Exemplary embodiments relate to a data transmitter and a data receiver for the telegram splitting transmission method. Some exemplary embodiments relate to an efficient use of a single-channel receiver for receiving multi-channel transmission. Some exemplary embodiments relate to a system for the digital transmission of data via a radio transmission system, the transmitted data being able to be transmitted in a plurality of sub-frequency channels of the entire available bandwidth. Embodiments are particularly suitable when using the so-called "Telegram Splitting Multiple Access" access method.

"Telegram splitting multiple access" (TSMA) is known from DE 10 2011 082 098 B4. In TSMA, the transmission of a message (data packet) is divided into a plurality of short sub-data packets (bursts), between each of which there are different lengths of non-transmission The sub-data packets are distributed according to a pseudo-random principle both over time and over the available frequency channels, which is shown schematically in FIG.

In detail, FIG. 1 shows in a diagram an exemplary assignment of the transmission channel when transmitting a message using Telegram Splitting Multiple Access (TSMA). As can be seen in FIG. 1, the plurality of sub-data packets 142 can be transmitted both in time and over a number of frequency channels.

Es wurde in [G. Kilian, M. Breiling, H. H. Petkov, H. Lieske, F. Beer, J. Robert, and A. Heuberger, "Increasing Transmission Reliability for Telemetry Systems Using Telegram Splitting," IEEE Transactions on Communications, vol. 63, no. 3, pp. 949-961 , Mar. 2015] gezeigt, dass mit dem TSMA-Verfahren eine größere Kapazität in der Datenübertragung erzielt werden kann als bei Übertragung eines Datenpakets in einem zusammenhängenden Block, d.h. ohne Aufteilung in Sub-Datenpakete. Um eine möglichst große Systemkapazität zu erhalten, sollten möglichst viele unterschiedliche Zeit-Frequenz-Sprungmuster (Hopping-Pattern) eingesetzt werden [DE 10 2017 206 236 A1]. Die Gesamtzahl der verwendeten Zeit-Frequenz-Sprungmuster muss dabei endlich sein und einem vorab bekannten Vorrat an Zeit-Frequenz-Sprungmustern entstammen.

In a transmission system with uncoordinated, random channel access by the participants (random multiple access), the data receiver at TSMA does not know in advance which time-frequency hopping pattern is used by a data transmitter. Therefore, the data receiver must observe the entire frequency band (consisting of several frequency channels) over a sufficiently long period of time and (for example by correlating the received signal with pilot symbol sequences known to it) recognize the occurrence of a time-frequency hopping pattern.

This has two drawbacks. First (problem A), the data receiver must always have a receiving unit that can receive several frequency channels at the same time. A multi-channel receiver is therefore required, ie the bandwidth of the receiver must extend at least over the entire bandwidth of the frequency hopping pattern and thus over several TSMA frequency channels. Second (problem B), the data receiver must expect the start of a transmission at any time. Since the time-frequency hopping pattern used is unknown beforehand, the reception signal must be correlated at every possible transmission start time with regard to each potential hopping pattern. This requires a comparatively high computing / processing power in the receiver.

The present invention is therefore based on the object of providing a concept which makes it possible to receive a TSMA transmission even with simple receivers.

This problem is solved by the independent claims.

Advantageous further developments can be found in the dependent claims.

Embodiments provide a data transmitter that is designed to split data into a plurality of sub-data packets and to transmit the plurality of sub-data packets in a distributed manner in accordance with a time / frequency hopping pattern, wherein there are transmission pauses between the sub-data packets in which is not transmitted, the data transmitter being designed to transmit a synchronization sub-data packet on a fixed synchronization frequency channel, the synchronization frequency channel and frequency channels in which the plurality of sub-data packets are transmitted in accordance with the time / frequency hopping pattern , are different.

Bei Ausführungsbeispielen kann der Datensender ausgebildet sein, um die Mehrzahl von Sub-Datenpaketen entsprechend eines Zei Frequenzsprungmusters verteilt auf zumindest zwei Frequenzkanälen eines Frequenzbands zu senden. Beispielsweise können die Mehrzahl von Sub-Datenpaketen entsprechend des Zei Frequenzsprungmusters auf zumindest zwei Frequenzkanälen einer Mehrzahl von Frequenzkanälen des Frequenzbands verteilt gesendet werden. Hierbei kann die Anzahl an Sub-Datenpaketen gleich, kleiner oder größer der Anzahl an Frequenzkanälen des Frequenzbands sein, wobei, unabhängig von der Anzahl an Sub-Datenpakten und unabhängig von der Anzahl an Frequenzkanälen, es Frequenzkanäle geben kann, in denen kein Sub-Datenpaket, genau ein Sub-Datenpaket oder mehr als ein Sub-Datenpaket gesendet wird.

In embodiments, the synchronization frequency channel can be a dedicated frequency channel of the frequency band. For example, the frequency band can have a plurality of frequency channels, wherein one frequency channel (or more than one frequency channel) of the plurality of frequency channels (exclusively) can be used for the transmission of the synchronization sub-data packet, while the other frequency channels of the plurality of frequency channels of the frequency band can be used for the transmission of the plurality of sub-data packets.

For example, the frequency band can have a plurality of frequency channels (for example 25 frequency channels in carriers from UCG_C0 to UCG_C24), it being possible for one frequency channel of the plurality of frequency channels of the frequency band to be used for the transmission of the synchronization sub-data packet ^ synchronization frequency channel; eg UCG_C24), while the other frequency channels of the frequency band can be used for the transmission of the plurality of sub-data packets (eg UCG-C0 to UCG_C23).

In exemplary embodiments, the synchronization sub-data packet can have information about the time / frequency hopping pattern.

In exemplary embodiments, the synchronization sub-data packet can contain the information about the time / frequency hopping pattern in at least one

a data field within the synchronization sub-data packet;

at least part of error protection data;

- At least part of a synchronization sequence for synchronizing the

Synchronization sub-data packets in a data receiver;

a jump pattern according to which the synchronization sub-data packet is distributed over at least two synchronization sub-data packets and is distributed in time and frequency;

a jump pattern between the transmission of the synchronization sub-data packet and a repeated transmission of the synchronization sub-data packet;

a data rate of the synchronization sub-data packet;

a channel code of the synchronization sub-data packet;

a code rate of the synchronization sub-data packet;

a modulation alphabet of the synchronization sub-data packet;

a type of modulation of the synchronization sub-data packet;

a frequency offset of the synchronization sub-data packet;

a time offset of the synchronization sub-data packet; and

a quartz tolerance of the data transmitter on which the synchronization sub-data packet depends;

exhibit.

In exemplary embodiments, the synchronization sub-data packet can be sent synchronized in time with the plurality of sub-data packets.

In exemplary embodiments, the data transmitter can be designed to send the synchronization sub-data packet ahead of the plurality of sub-data packets.

In exemplary embodiments, the data transmitter can be designed to encode the data channel and to divide it into the plurality of sub-data packets in such a way that only a second group of sub-data packets is required for decoding the data if the data are successfully transmitted, and for one erroneous transmission by a combination of a first group of sub-data packets and the second group of sub-data packets a higher code gain is achieved, the data transmitter being designed to time the first group of sub-data packets ahead of the second group of sub-data packets send, and wherein the data transmitter is designed to send the synchronization sub-data packet after the first group of sub-data packets and before the second group of sub-data packets.

In exemplary embodiments, the data transmitter can be designed to send the synchronization sub-data packet instead of one sub-data packet of the plurality of sub-data packets.

In exemplary embodiments, the synchronization sub-data packet can be one of the plurality of sub-data packets.

In exemplary embodiments, the synchronization sub-data packet can have a synchronization sequence for synchronization of the synchronization sub-data packet in a data receiver.

In exemplary embodiments, the data transmitter can be designed to transmit only (exclusively) the synchronization sub-data packet into the synchronization frequency channel.

In exemplary embodiments, the data transmitter can be designed to send the synchronization sub-data packet with a different bandwidth than the plurality of sub-data packets.

In exemplary embodiments, the data transmitter can be designed to send the synchronization sub-data packet at a different symbol rate than the plurality of sub-data packets.

In exemplary embodiments, the data transmitter can be designed to send the synchronization sub-data packet with a different type of modulation than the plurality of sub-data packets.

In exemplary embodiments, the data transmitter can be designed to send the synchronization sub-data packet with a different transmission power than the number of sub-data packets.

In exemplary embodiments, the data transmitter can be designed to provide the synchronization sub-data packet with a different channel coding or a channel coding with a different error protection than the plurality of sub-data packets.

In exemplary embodiments, the synchronization frequency channel and the frequency channels in which the plurality of sub-data packets are transmitted can be channels of a frequency band that is assigned to the data transmitter.

In embodiments, the synchronization frequency channel and the frequency channels in which the plurality of sub-data packets are sent can be channels of different frequency bands.

In exemplary embodiments, the data transmitter can be designed to repeatedly transmit the synchronization sub-data packet.

In exemplary embodiments, the data transmitter can be designed to divide the synchronization sub-data packet into at least two synchronization sub-data packets and to transmit them at a time interval, so that there are transmission pauses between the synchronization sub-data packets, in which are not broadcast.

In exemplary embodiments, the data transmitter can be designed to send the at least two synchronization sub-sub data packets in different dedicated synchronization frequency channels.

In exemplary embodiments, the data transmitter can be designed to send the at least two synchronization sub-data packets in the different dedicated synchronization frequency channels with different transmission powers.

In exemplary embodiments, the data transmitter can be designed to send the at least two synchronization sub-sub-data packets with different transmission frequencies within the bandwidth of the same synchronization frequency channel.

In embodiments, one of the at least two synchronization sub-data packets can have a synchronization sequence, a second of the at least two synchronization sub-data packets having information about the time / frequency hopping pattern with which the plurality of sub-data packets are transmitted become.

In exemplary embodiments, the synchronization sub-data packet can have activation information by means of which a data receiver can determine whether the data which are sent by means of the plurality of sub-data packets are intended for the data receiver or are intended for further processing in the data receiver

In exemplary embodiments, the activation information can be at least one

an indicator that indicates whether the data should be received;

address information of the data transmitter or information derived therefrom; an address information of a group of data transmitters to which the data transmitter is assigned, or information derived therefrom;

- Address information of the data receiver or information derived therefrom; and

an address information of a group of data receivers to which the data receiver is assigned, or information derived therefrom.

In exemplary embodiments, the synchronization sub-data packet can have configuration information for receiving the plurality of sub-data packets.

In exemplary embodiments, the configuration information can be at least one of a data rate;

- a channel code;

a code rate;

a modulation alphabet;

a type of modulation;

a pilot sequence;

- a frequency offset;

a time offset; and

a quartz tolerance.

Further exemplary embodiments provide a data transmitter which is designed to divide data into a plurality of sub-data packets and to transmit the plurality of sub-data packets in accordance with a time / frequency hopping pattern in a plurality of frequency channels, between the sub-data packets There are transmission pauses in which there is no transmission, the data transmitter being designed to carry out a synchronization sub-data packet on a synchronization which is fixed relative to the frequency channels in which the plurality of sub-data packets are transmitted in accordance with the time / frequency hopping pattern. Frequency channel to send.

Further exemplary embodiments provide a data receiver which is designed to receive data which is distributed over a plurality of sub-data packets and is distributed in accordance with a time / frequency hopping pattern, wherein there are transmission pauses between the sub-data packets in which no transmission takes place, the data receiver being designed to receive a synchronization sub-data packet on a fixed (dedicated) synchronization frequency channel, the synchronization frequency channel and frequency channels in which the plurality of sub-data packets are mainly transmitted according to the time / frequency hopping pattern , are different.

In exemplary embodiments, the synchronization sub-data packet can have information about the time / frequency hopping pattern with which the plurality of sub-data packets are transmitted, wherein the data receiver can be designed to transmit the plurality of sub-data packets using the information about to receive the time / frequency hopping pattern.

In exemplary embodiments, the data receiver can be designed to extract the information about the time / frequency hopping pattern from at least one

a data field within the synchronization sub-data packet;

at least part of error protection data;

at least part of a synchronization sequence for synchronization of the synchronization sub-data packet in a data receiver;

a hopping pattern according to which the synchronization sub-data packet is sent divided over at least two synchronization sub-data packets in time and frequency;

a jump pattern between the transmission of the synchronization sub-data packet and a repeated transmission of the synchronization sub-data packet;

a data rate of the synchronization sub-data packet;

a channel code of the synchronization sub-data packet;

a code rate of the synchronization sub-data packet;

a modulation alphabet of the synchronization sub-data packet;

a type of modulation of the synchronization sub-data packet;

a frequency offset of the synchronization sub-data packet;

a time offset of the synchronization sub-data packet; and

a quartz tolerance of the data transmitter on which the synchronization sub-data packet depends;

to extract.

In exemplary embodiments, the synchronization sub-data packet can be transmitted synchronized in time with the plurality of sub-data packets, and the data receiver can be designed to receive the plurality of sub-data packets synchronized in time with the synchronization sub-data packet.

In exemplary embodiments, the data receiver can be designed to receive the synchronization sub-data packet before the plurality of sub-data packets.

In exemplary embodiments, the data can be channel-coded and divided into the plurality of sub-data packets in such a way that only a second group of sub-data packets is required for decoding the data if the latter are successfully transmitted, and if the transmission is incorrect due to a combination of a first one Group of sub-data packets and the second group of sub-data packets, a higher code gain is achieved, the first group of sub-data packets being transmitted before the second group of sub-data packets, and the synchronization sub-data packet after the first Group of sub-data packets and is transmitted before the second group of sub-data packets, the synchronization sub-data packet providing information about the time / frequency hopping pattern,with which the second group of sub-data packets is transmitted, wherein the data receiver can be designed to receive the second group of sub-data packets using the information about the time frequency hopping pattern.

In exemplary embodiments, the data receiver can be designed to combine and decode the second group of sub-data packets in order to obtain the data.

In exemplary embodiments, a reception bandwidth of the data receiver can be smaller than a bandwidth over which the plurality of sub-data packets are distributed in accordance with the time / frequency hopping pattern in the frequency channels of the frequency band.

In exemplary embodiments, the data receiver can have a receiving unit which is designed to output hard-decided bits.

In embodiments, the data receiver may be a single-channel receiver that can receive only one frequency channel of a plurality of frequency channels of a frequency band at the same time, the data receiver being configured to switch between the frequency channels of the frequency band in accordance with the information about the time-frequency hopping pattern to the plurality of sub -To receive data packets that are transmitted according to the time / frequency hopping pattern on the respective frequency channels.

In embodiments, the data receiver may be configured to monitor the synchronization frequency channel in order to receive the synchronization sub-data packet, the data receiver being configured to switch between the frequency channels of the frequency band according to the information after receipt of the synchronization sub-data packet switch over the time / frequency hopping pattern to receive the plurality of sub-data packets that are transmitted according to the time / frequency hopping pattern on the respective frequency channels.

In exemplary embodiments, the synchronization sub-data packet can have a synchronization sequence for synchronization of the synchronization sub-data packet in a data receiver, wherein the data receiver can be designed to transmit the synchronization sub-data packet using a

Detect reference synchronization sequence in a receive data stream.

In exemplary embodiments, the data receiver can be designed to receive only (exclusively) the synchronization sub-data packet on the synchronization frequency channel.

In exemplary embodiments, the data receiver can be designed to receive the synchronization sub-data packet with a lower bandwidth than the plurality of sub-data packets.

In exemplary embodiments, the data receiver can be designed to receive the synchronization sub-data packet using a different type of modulation than the plurality of sub-data packets.

In exemplary embodiments, the synchronization sub-data packet can be sent with a different transmission power than the plurality of sub-data packets.

In exemplary embodiments, the synchronization sub-data packet can be provided with a different channel coding or a channel coding with a different error protection than the plurality of sub-data packets.

In exemplary embodiments, the synchronization frequency channel and the frequency channels in which the plurality of sub-data packets are transmitted can be channels of a frequency band which is assigned to the data transmitter and the data receiver.

In embodiments, the synchronization frequency channel and the frequency channels in which the plurality of sub-data packets are sent can be channels of different frequency bands.

In exemplary embodiments, the synchronization sub-data packet can be transmitted repeatedly, wherein the data receiver can be designed to receive the plurality of sub-data packets based on at least one of the repeatedly transmitted synchronization sub-data packets or a combination of the repeatedly transmitted synchronization sub-data packets to recieve.

In the case of exemplary embodiments, the synchronization sub-data packet can be divided into at least two synchronization sub-data packets and transmitted at a time interval, so that there are transmission pauses between the synchronization sub-data packets during which no transmission takes place.

In exemplary embodiments, the data receiver can be designed to receive the at least two synchronization sub-sub data packets on different dedicated synchronization frequency channels.

In exemplary embodiments, the at least two synchronization sub-sub data packets can be transmitted on the different dedicated synchronization frequency channels with different transmission powers.

In exemplary embodiments, the data receiver can be designed to receive the at least two synchronization sub-data packets within the bandwidth of the same synchronization frequency channel with different transmission frequencies.

In exemplary embodiments, the data receiver can be designed to receive and combine the at least two synchronization sub-data packets in order to obtain the synchronization sub-data packet.

In exemplary embodiments, one of the at least two synchronization sub-data packets can have a synchronization sequence, wherein a second of the at least two synchronization sub-data packets can have information about the time / frequency hopping pattern with which the plurality of sub-data packets are sent, wherein the data receiver can be designed to detect the first of the at least two synchronization sub-sub-data packets using a reference synchronization sequence in a receive data stream, and based on a known time / frequency interval between the at least two synchronization sub-packets. Sub-data packets to receive the at least one further synchronization part-sub-data packet in order to obtain the information about the time frequency hopping pattern.

In exemplary embodiments, the synchronization sub-data packet can have activation information by means of which a data receiver can determine whether the data that are sent by means of the plurality of sub-data packets are intended for the data receiver, wherein the data receiver can be designed to use the activation information to determine whether the data sent by means of the plurality of sub-data packets is intended for the data receiver and, if the data are intended for the data receiver, to receive the plurality of sub-data packets.

In exemplary embodiments, the activation information can be at least one

an indicator that indicates whether the data should be received;

address information of the data transmitter or information derived therefrom; an address information of a group of data transmitters to which the data transmitter is assigned, or information derived therefrom;

an address information of the data receiver or information derived therefrom; and

an address information of a group of data receivers to which the data receiver is assigned, or information derived therefrom.

In exemplary embodiments, the synchronization sub-data packet can have configuration information for receiving the plurality of sub-data packets,

wherein the data receiver can be designed to receive the plurality of sub-data packets in accordance with the configuration information.

In exemplary embodiments, the configuration information can be at least one of - a data rate;

a channel code;

a code rate;

a modulation alphabet;

a type of modulation;

- a pilot sequence;

a frequency offset;

a time offset; and

a quartz tolerance.

In exemplary embodiments, the data receiver can be a data receiver that can receive data at the same time only on one frequency channel.

Further exemplary embodiments provide a data receiver which is designed to receive data which is distributed over a plurality of sub-data packets and is distributed in accordance with a time / frequency hopping pattern in a plurality of frequency channels, transmission pauses being present between the sub-data packets, in which transmission is not carried out, the data receiver being designed to receive a synchronization sub-data packet on a synchronization frequency channel which is fixed relative to the frequency channels in which the plurality of sub-data packets are transmitted in accordance with the time / frequency hopping pattern.

Further exemplary embodiments provide a repeater which is designed to receive data distributed over a plurality of sub-data packets in accordance with a time / frequency hopping pattern, in order to receive a plurality of received sub-data packets, with the plurality of sub-data packets there are transmission pauses in which there is no transmission, the repeater being designed to transmit the data repeatedly by sending out a plurality of repeated sub-data packets in accordance with a repeated time / frequency hopping pattern, wherein between the plurality of repeated sub-packets Data packets are paused during which there is no transmission.

In exemplary embodiments, the repeater can be designed to retransmit the plurality of received sub-data packets in sub-data packet manner in order to send the plurality of repeated sub-data packets.

In embodiments, the repeater may be configured to combine and decode the plurality of received sub-data packets to obtain the data, and the repeater may be configured to re-encode the data and divide it between the plurality of repeated sub-data packets .

In embodiments, the repeater may be configured to combine and decode the plurality of received sub-data packets to obtain the data, wherein the repeater may be configured to re-encode the data and information derived therefrom to the plurality of repeated ones Split sub-data packets.

In exemplary embodiments, the data can be encoded and distributed over the plurality of sub-data packets in such a way that, in the case of an error-free transmission, only a first group of sub-data packets of the plurality of sub-data packets is required for successful decoding of the data, and that for a faulty one Decoding by a combination of the first group of sub-data packets and a second group of sub-data packets an increased code gain is achieved, wherein the repeater can be designed to decode the first group of received sub-data packets and, if the decoding is successful was to re-encode the data and to split and transmit it at least to a first group of repeated sub-data packets, even before a last sub-data packet of the plurality of sub-data packets was received.

In exemplary embodiments, the repeater can be designed to decode the first group of received sub-data packets and, if the decoding was unsuccessful, to combine and combine the first group of received sub-data packets with the second group of received sub-data packets decode to obtain and re-encode the data and split it between the plurality of repeated sub-data packets.

In exemplary embodiments, the repeater can be designed to divide the data into the plurality of repeated sub-data packets in such a way that a number of the repeated sub-data packets is less than a number of the sub-data packets or received sub-data packets.

In exemplary embodiments, the repeater can be designed to re-encode the data in such a way and to divide it up among the plurality of repeated sub-data packets in such a way that the plurality of sub-data packets and the plurality of repeated sub-data packets can be at least partially combined on the receiver side by one to achieve higher code gain.

In embodiments, the repeater can be designed to transmit the plurality of repeated sub-data packets in accordance with the repeated time / frequency hopping pattern in such a way that the time / frequency hopping pattern and the repeated time / frequency hopping pattern result in a combined time / frequency hopping pattern that is common to the receiver is receivable.

In embodiments, the repeater may be configured to receive a synchronization sub-data packet on a fixed (dedicated) synchronization frequency channel, the synchronization frequency channel and frequency channels in which the plurality of sub-data packets are mainly transmitted according to the time frequency hopping pattern , are different.

In exemplary embodiments, the repeater can be designed to retransmit the synchronization sub-data packet or a newly generated synchronization sub-data packet on the fixed synchronization frequency channel or another fixed synchronization frequency channel.

In exemplary embodiments, the synchronization sub-data packet can have activation information by means of which the repeater can determine whether the data which are sent by means of the plurality of sub-data packets are to be sent repeatedly, the repeater being able to be configured to use the Activation information to determine whether the data sent using the plurality of sub-data packets should be repeatedly sent out and, if the data is sent out repeatedly, to receive the plurality of sub-data packets and using the plurality of repeated sub-packets -Send data packets again.

In exemplary embodiments, the activation information can be at least one

an indicator that indicates whether the data should be received;

address information of the data transmitter or information derived therefrom; an address information of a group of data transmitters to which the data transmitter is assigned, or information derived therefrom;

an address information of the data receiver or information derived therefrom;

- Address information of a group of data receivers to which the data receiver is assigned, or information derived therefrom;

a counter that indicates how often the data has already been sent repeatedly.

In exemplary embodiments, the repeater can be designed to update the activation information and to send out the updated activation information with the synchronization sub-data packet.

In embodiments, the received time / frequency hopping pattern and the repeated time / frequency hopping pattern may be the same or different.

In exemplary embodiments, the repeater can be designed to transmit the plurality of repeated sub-data packets in a different frequency band than the plurality of received sub-data packets were received.

In exemplary embodiments, the synchronization sub-data packet can have information about the time / frequency hopping pattern with which the plurality of sub-data packets are transmitted, and the repeater can be designed to transmit the plurality of sub-data packets using the information about to receive the time / frequency hopping pattern.

In exemplary embodiments, the repeater can be designed to extract the information about the time / frequency hopping pattern from at least one

a data field within the synchronization sub-data packet;

at least part of error protection data;

- At least part of a synchronization sequence for synchronizing the

Synchronization sub-data packets in a repeater;

a hopping pattern according to which the synchronization sub-data packet is sent divided over at least two synchronization sub-data packets in time and frequency;

a jump pattern between the transmission of the synchronization sub-data packet and a repeated transmission of the synchronization sub-data packet;

a data rate of the synchronization sub-data packet;

a channel code of the synchronization sub-data packet;

a code rate of the synchronization sub-data packet;

a modulation alphabet of the synchronization sub-data packet;

a type of modulation of the synchronization sub-data packet;

a frequency offset of the synchronization sub-data packet;

a time offset of the synchronization sub-data packet; and

a quartz tolerance of the data transmitter on which the synchronization sub-data packet depends;

to extract.

In exemplary embodiments, the synchronization sub-data packet can be temporal

are sent synchronized to the plurality of sub-data packets, wherein the repeater can be designed to receive the plurality of sub-data packets synchronized in time with the synchronization sub-data packet.

In exemplary embodiments, the repeater can be designed to receive the synchronization sub-data packet before the plurality of sub-data packets.

In exemplary embodiments, the data can be channel-coded and divided into the plurality of sub-data packets in such a way that only a second group of sub-data packets is required for decoding the data if the latter are successfully transmitted, and if the transmission is incorrect due to a combination of a first one Group of sub-data packets and the second group of sub-data packets, a higher code gain is achieved, the first group of sub-data packets being transmitted before the second group of sub-data packets, and the synchronization sub-data packet after the first Group of sub-data packets and before the second group of sub-data packets is transmitted, the synchronization sub-data packet

Information about the time / frequency hopping pattern with which the second group of sub-data packets is transmitted, wherein the repeater can be designed to receive the second group of sub-data packets using the information about the time / frequency hopping pattern.

In embodiments, the repeater can be designed to combine and decode the second group of sub-data packets in order to obtain the data.

In exemplary embodiments, a reception bandwidth of the repeater can be smaller than a bandwidth over which the plurality of sub-data packets are distributed in accordance with the time / frequency hopping pattern in the frequency channels of the frequency band.

In exemplary embodiments, the repeater can have a receiving unit which is designed to output hard-decided bits.

In embodiments, the repeater can be a single-channel receiver that can receive only one frequency channel of a plurality of frequency channels of a frequency band at the same time, wherein the repeater can be designed to switch between the

Switch frequency channels of the frequency band in accordance with the information about the time / frequency hopping pattern to receive the plurality of sub-data packets corresponding to the respective time / frequency hopping pattern

Frequency channels are transmitted.

In embodiments, the repeater can be configured to monitor the synchronization frequency channel in order to receive the synchronization sub-data packet, the repeater being configured to correspond between the frequency channels of the frequency band after the reception of the synchronization sub-data packet

Switching information about the time / frequency hopping pattern to receive the plurality of sub-data packets that are transmitted according to the time / frequency hopping pattern on the respective frequency channels.

In exemplary embodiments, the synchronization sub-data packet can be a

Have synchronization sequence for synchronization of the synchronization sub-data packet in a repeater, wherein the repeater can be designed to

Synchronization sub-data packet using a

Detect reference synchronization sequence in a receive data stream.

In embodiments, the repeater can be designed to on the

Synchronization frequency channel only (exclusively) to receive the synchronization sub-data packet.

In exemplary embodiments, the repeater can be designed to receive the synchronization sub-data packet with a lower bandwidth than the plurality of sub-data packets.

In embodiments, the repeater can be configured to receive the synchronization sub-data packet using a different type of modulation than the plurality of sub-data packets.

In exemplary embodiments, the synchronization sub-data packet can be sent with a different transmission power than the plurality of sub-data packets.

In exemplary embodiments, the synchronization sub-data packet can be provided with a different channel coding or a channel coding with a different error protection than the plurality of sub-data packets.

In embodiments, the synchronization frequency channel and

Frequency channels in which the plurality of sub-data packets are transmitted can be channels of a frequency band that is assigned to the data transmitter and the repeater.

In embodiments, the synchronization frequency channel and

Frequency channels in which the plurality of sub-data packets are sent are channels of different frequency bands.

In exemplary embodiments, the synchronization sub-data packet can be transmitted repeatedly, the repeater being able to be configured to transmit the plurality of sub-data packets based on at least one of the repeatedly transmitted data packets

Receive synchronization sub-data packets or a combination of the repeatedly transmitted synchronization sub-data packets.

In the case of exemplary embodiments, the synchronization sub-data packet can be divided into at least two synchronization sub-data packets and transmitted at a time interval, so that there are transmission pauses between the synchronization sub-data packets during which no transmission takes place.

In exemplary embodiments, the repeater can be designed to receive the at least two synchronization sub-data packets on different dedicated synchronization frequency channels.

In exemplary embodiments, the at least two synchronization sub-sub data packets can be transmitted on the different dedicated synchronization frequency channels with different transmission powers.

In exemplary embodiments, the repeater can be designed to transmit the at least two synchronization sub-sub-data packets within the same bandwidth

Receive synchronization frequency channel with different transmission frequencies.

In exemplary embodiments, the repeater can be designed to receive and combine the at least two synchronization sub-data packets in order to do this

Obtain synchronization sub-data packet.

In exemplary embodiments, one of the at least two synchronization sub-data packets can have a synchronization sequence, wherein a second of the at least two synchronization sub-data packets can have information about the time / frequency hopping pattern with which the plurality of sub-data packets are sent, wherein the repeater can be configured to use the first of the at least two synchronization sub-data packets

Detect reference synchronization sequence in a receive data stream, and based on a known time / frequency interval between the at least two

Synchronization part-sub-data packets to receive the at least one further synchronization part-sub-data packet in order to obtain the information about the time frequency hopping pattern.

In exemplary embodiments, the synchronization sub-data packet can be a

Have activation information, by means of which a repeater can determine whether the data that are sent by means of the plurality of sub-data packets are intended for the repeater or data receiver, wherein the repeater can be designed to use the activation information to determine whether the data , which are sent by means of the plurality of sub-data packets, are intended for the repeater or data receiver, and in order, if the data are intended for the repeater or data receiver, to receive the plurality of sub-data packets.

In exemplary embodiments, the activation information can be at least one of - an indicator that indicates whether the data should be received;

address information of the data transmitter or information derived therefrom; an address information of a group of data transmitters to which the data transmitter is assigned, or information derived therefrom;

address information of the data receiver or repeater or information derived therefrom; and

- An address information of a group of data recipients, the

Data receiver is assigned, or information derived from it.

In exemplary embodiments, the synchronization sub-data packet can be a

Have configuration information for receiving the plurality of sub-data packets, wherein the repeater can be designed to receive the plurality of sub-data packets in accordance with the configuration information.

In exemplary embodiments, the configuration information can be at least one of a data rate;

- a channel code;

a code rate;

a modulation alphabet;

a type of modulation;

a pilot sequence;

- a frequency offset;

a time offset; and

a quartz tolerance.

In embodiments, the repeater can be a repeater that can receive data at the same time only on one frequency channel.

Further exemplary embodiments provide a method for sending data. The method comprises a step of dividing the data into a plurality of sub-data packets. Furthermore, the method comprises a step of transmitting the plurality of sub-data packets distributed in accordance with a time / frequency hopping pattern, wherein there are transmission pauses between the sub-data packets in which there is no transmission. The method further comprises a step of transmitting a synchronization sub-data packet on a fixed (dedicated) synchronization frequency channel, the synchronization frequency channel and frequency channels in which the plurality of sub-data packets are mainly transmitted according to the time / frequency hopping pattern, are different.

Further exemplary embodiments provide a method for receiving data which are distributed over a plurality of sub-data packets and which are distributed in accordance with a time / frequency hopping pattern, wherein there are transmission pauses between the sub-data packets in which no transmission takes place. The method comprises a step of receiving the plurality of sub-data packets. The method further comprises a step of receiving a synchronization sub-data packet on a fixed (dedicated) synchronization frequency channel, the synchronization frequency channel and frequency channels in which the plurality of sub-data packets are mainly transmitted according to the time / frequency hopping pattern, are different.

Further exemplary embodiments provide a method for the repeated transmission of data which are distributed over a plurality of sub-data packets and are distributed in accordance with a time / frequency hopping pattern, wherein there are transmission pauses between the sub-data packets in which no transmission takes place. The method comprises a step of receiving the plurality of sub-data packets. The method further comprises a step of repeatedly transmitting the data by transmitting a plurality of repeated sub-data packets in accordance with a repeated time / frequency hopping pattern, wherein there are transmission pauses between the plurality of repeated sub-data packets in which no transmission takes place.

Embodiments of the present invention enable the use of single-channel receivers (= very inexpensive data receivers) and receive the advantage of the comparatively large data transmission capacity of the TS MA process, which is caused by the use of pseudo-random time-frequency hopping patterns.

Embodiments of the present invention simultaneously make it possible to avoid the disadvantages mentioned at the outset of a relatively complex multi-channel receiver (high bandwidth) and the required high computing power (correlation with regard to all theoretically possible time-frequency hopping patterns).

In exemplary embodiments, the first or a very early or any specific sub-data packet of the data transmission (1) can be sent on a fixed, previously known frequency channel, and (2) contain information about the time-frequency hopping pattern used (below).

In exemplary embodiments, this data packet is referred to as a synchronization sub-data packet.

In exemplary embodiments, the data receiver can be equipped with a single-channel receiver, which detects on the previously known frequency channel (1) the synchronization sub-data packet (which was unknown to it), (2) determines its content (ie at least the information about the time-frequency hopping pattern used in the subsequent sub-data packets is obtained) and then (3) receives the subsequent sub-data packets in accordance with the time-frequency hopping pattern and feeds them for further processing.

In the case of exemplary embodiments, the data receiver can manage with less computation effort, since it only detects the (1) (at an unknown time) transmitted data packet, (2) determines its content (ie at least the information about the time frequency used in the subsequent sub-data packets Jump pattern obtained) and then (3) receives the subsequent sub-data packets according to the time-frequency jump pattern and feeds them for further processing.

Embodiments of the present invention are described in more detail with reference to the accompanying figures. Show it:

1 shows a diagram of an exemplary assignment of the transmission channel when transmitting a message using Telegram Splitting Multiple Access (TSMA);

2 shows a schematic block diagram of a system with a data transmitter and a data receiver;

3 shows a diagram of an exemplary assignment of the transmission channel when transmitting a plurality of sub-data packets in accordance with a time and frequency hopping pattern;

Fig. 4 in a diagram shows an exemplary assignment of the transmission channel in the transmission of a plurality of sub-data packets according to a time / frequency hopping pattern on different frequency channels and the transmission of a synchronization sub-data packet on a fixed, dedicated synchronization frequency channel, according to one Embodiment;

5 shows in a diagram an exemplary assignment of the transmission channel during the transmission of a plurality of sub-data packets according to a time / frequency hopping pattern on different frequency channels and the transmission of a synchronization sub-data packet on a fixed, dedicated synchronization frequency channel, according to a another embodiment; and

Fig. 6 is a schematic block diagram of a system with a data transmitter and a repeater and a transmission channel between data transmitter repeaters.

In the following description of the exemplary embodiments of the present invention, elements that are the same or have the same effect are provided with the same reference symbols in the figures, so that their description is interchangeable.

Before exemplary embodiments of the present invention are described in detail, the communication system on which the invention is based is first described in more detail by way of example with reference to FIGS. 2 and 3. However, it should be pointed out that the communication system explained with reference to FIGS. 2 and 3 is only shown or described by way of example and is in no way to be interpreted restrictively. Rather, the communication system is presented in a highly abstract manner in order to explain the underlying principles in a simple and understandable manner.

FIG. 2 shows a schematic block diagram of an exemplary communication system with a data transmitter 00 and a data receiver 110.

Data transmitter 100 may be configured to split data 120 (or a data packet with data 120) into a plurality of sub-data packets 142 and to distribute the plurality of sub-data packets 142 in time and / or frequency using a jump pattern 140 to send.

The data receiver 1 10 can be designed to receive the plurality of sub-data packets 142 in order to receive the data which are distributed over the plurality of sub-data packets and are distributed in time and / or frequency in accordance with the jump pattern 140 .

As shown by way of example in FIG. 2, the data transmitter 100 can have a transmission device (or transmission module, or transmitter) 102 that is designed to transmit the data 120. The transmission device 102 can be connected to an antenna 104 of the data transmitter 100. The data transmitter 100 can furthermore have a receiving device (or receiving module, or receiver) 106, which is designed to receive data. The receiving device 106 can be connected to the antenna 104 or a further (separate) antenna of the data transmitter 100. The data transmitter 100 can also have a combined transceiver.

The data receiver 1 10 can have a receiving device (or receiving module, or receiver) 1 16, which is designed to receive data 120. The receiving device 1 16 can be connected to an antenna 1 14 of the data receiver 1 10. Furthermore, the data receiver 1 10 can have a transmission device (or transmission module, or transmitter) 1 12, which is designed to transmit data. The transmitting device 1 12 can be connected to the antenna 1 14 or a further (separate) antenna of the data receiver 1 10. The data receiver 1 10 can also have a combined transceiver.

In embodiments, the data transmitter 100 can be a sensor node, while the data receiver 110 can be a base station. A communication system typically comprises at least one data receiver 110 (base station) and a multiplicity of data transmitters (sensor nodes, such as, for example, heating meters). Of course, it is also possible for the data transmitter 100 to be a base station, while the data receiver 110 is a sensor node. Furthermore, it is possible for both the data transmitter 100 and the data receiver 110 to be 10 sensor nodes. It is also possible that both the data transmitter 100 and the data receiver 110 are 10 base stations.

The data transmitter 100 and the data receiver 110 can be designed to send or receive the data 120 using the telegram splitting method (TS method). In this case, a telegram or data packet 120 is divided into a plurality of sub-data packets (or sub-data packets, or sub-packets) 142 and the sub-data packets 142 are distributed in time and / or frequency in accordance with the jump pattern 140 from the data transmitter 100 to the data receiver 1 10 transmitted, the data receiver 1 10 reassembling (or combining) the sub-data packets in order to obtain the data packet 120. The sub-data packets 142 can each contain only a part of the data packet 120, so that the sub-data packets 142 are each shorter than the data packet 120.

The data packet 120 can also be channel-coded, so that not all sub-data packets 142, but only a part of the sub-data packets 142, are required for error-free decoding of the data packet 120.

As already mentioned, the temporal distribution of the plurality of sub-data packets 142 can take place in accordance with a time and / or frequency hopping pattern.

A time jump pattern can specify a sequence of transmission times or transmission time intervals (jumps) with which the sub-data packets are sent. For example, a first sub-data packet can be sent at a first transmission time (or in a first transmission time slot) and a second sub-data packet at a second transmission time (or in a second transmission time slot), the first transmission time and the second transmission time being different. The time jump pattern can define (or specify or specify) the first transmission time and the second transmission time. Alternatively, the time jump pattern can indicate the first transmission time and a time interval between the first transmission time and the second transmission time. Of course, the time jump pattern can also only indicate the time interval between the first time and the second time of transmission. There may be transmission pauses between the sub-data packets in which there is no transmission. The sub-data packets can also overlap in time (overlap).

A frequency hopping pattern can specify a sequence of transmission frequencies or transmission frequency hops with which the sub-data packets are sent. For example, a first sub-data packet with a first transmission frequency (or in a first frequency channel) and a second sub-data packet with a second transmission frequency (or in a second frequency channel) can be transmitted, the first transmission frequency and the second transmission frequency being different. The frequency hopping pattern can define (or specify or specify) the first transmission frequency and the second transmission frequency. Alternatively, the frequency hopping pattern can indicate the first transmission frequency and a frequency spacing (transmission frequency hopping) between the first transmission frequency and the second transmission frequency. Of course, the frequency hopping pattern can also only indicate the frequency spacing (transmission frequency hopping) between the first transmission frequency and the second transmission frequency. Furthermore, the frequency hopping pattern can indicate the frequency channels or a sequence of frequency channels in which the sub-data packets are sent.

Of course, the plurality of sub-data packets 142 can also be transmitted from the data transmitter 100 to the data receiver 110 in a manner distributed both in time and in frequency. The distribution of the plurality of sub-data packets in time and in frequency can take place according to a time and frequency hopping pattern. A time and frequency hopping pattern can be the combination of a time hopping pattern and a frequency hopping pattern, ie a sequence of transmission times or transmission time intervals with which the sub-data packets are transmitted, transmission frequencies (or transmission frequency jumps) being assigned to the transmission times (or transmission time intervals).

The time and / or frequency hopping pattern can have a plurality of hops, the plurality of hops each specifying a transmission time and / or a transmission frequency (or a transmission time heap or transmission frequency jump) according to which the plurality of sub-data packets 142 can be transmitted.

FIG. 3 shows in a diagram an exemplary assignment of the transmission channel during the transmission of a plurality of sub-data packets 142 in accordance with a time and frequency hopping pattern. The ordinate describes the frequency and the abscissa the time.

As can be seen in FIG. 3, the data packet 120 can, for example, be divided into n = 7 sub-data packets 142 and transmitted according to a time and frequency hopping pattern distributed in time and frequency from the data transmitter 100 to the data receiver 110.

As can also be seen in FIG. 3, a synchronization sequence 144 can also be divided between the plurality of sub-data packets 142, so that the plurality of sub-data packets 1 2, in addition to data (data symbols in FIG. 3) 146, are each a part of the Synchronization sequence (synchronization symbols in Fig. 3) 144 included.

Detailed exemplary embodiments of the data transmitter 100 and the data receiver 110 are described in more detail below.

1. TSMA method with Synchronisatjons sub-data packet

In embodiments, the data transmitter 100 may be configured to transmit a synchronization sub-data packet 160 on a fixed, dedicated synchronization frequency channel 162, the fixed, dedicated synchronization frequency channel and frequency channels 164 in which the plurality of sub-data packets 142 4 are transmitted in accordance with the time / frequency hopping pattern 140, as shown in FIG.

In embodiments, the data receiver 110 may be configured to receive the synchronization sub-data packet 160 on the fixed, dedicated synchronization frequency channel 162, the fixed, dedicated synchronization frequency channel and the frequency channels 164 in which the plurality of sub-data packets 142 transmitted according to the time / frequency hopping pattern 140 are different, as shown in FIG. 4.

4 shows in a diagram an exemplary assignment of the transmission channel between data transmitter 100 and data receiver 110 during the transmission of a plurality of sub-data packets 142 according to a time / frequency hopping pattern 140 distributed over time and on different frequency channels 164 and the transmission of one Synchronization sub-data packet 160 on a fixed, dedicated synchronization frequency channel 162, according to an embodiment.

As can be seen in FIG. 4, in exemplary embodiments the synchronization sub-data packet 160 can be transmitted, for example, in time before the plurality of sub-data packets 142.

In exemplary embodiments, the synchronization sub-data packet 160 can have information about the time / frequency hopping pattern 140 with which the plurality of sub-data packets 142 are transmitted. The data receiver 110 can be designed to receive the plurality of sub-data packets 142 using the information about the time / frequency hopping pattern 142.

For example, the information about the time / frequency hopping pattern can be the time / frequency hopping pattern itself, such as transmission times (or transmission time intervals) and corresponding frequency channels (or frequency channel hops) of the plurality of sub-data packets, based on which the data receiver 1 10 has the plurality of sub-data packets 142 can receive or localize in a receive data stream.

Of course, the information about the time frequency hopping pattern can also be information derived from the time frequency hopping pattern, on the basis of which the data receiver 110 can determine the time frequency hopping pattern.

Furthermore, it is possible that the time frequency hopping pattern 140 is already known to the data receiver 110. In this case, the information about the time / frequency hopping pattern can be, for example, a point in time and / or a frequency channel at which the transmission of the plurality of sub-data packets 142 in accordance with the time / frequency hopping pattern 140 begins. Furthermore, the information about the time / frequency hopping pattern can be, for example, a time interval or a frequency channel spacing between the synchronization sub-data packet 160 and the time / frequency hopping pattern 140 or one of the sub-data packets (for example the first sub-data packet).

In exemplary embodiments, the synchronization sub-data packet 160 can use at least one of the information about the time frequency hopping pattern 140

a data field within the synchronization sub-data packet; at least part of error protection data;

at least part of a synchronization sequence for synchronization of the synchronization sub-data packet in a data receiver;

a jump pattern according to which the synchronization sub-data packet is distributed over at least two synchronization sub-data packets and is distributed in time and frequency;

a jump pattern between the transmission of the synchronization sub-data packet and a repeated transmission of the synchronization sub-data packet;

a data rate of the synchronization sub-data packet;

a channel code of the synchronization sub-data packet;

a code rate of the synchronization sub-data packet;

a modulation alphabet of the synchronization sub-data packet; a type of modulation of the synchronization sub-data packet;

a frequency offset of the synchronization sub-data packet;

a time offset of the synchronization sub-data packet; and

a quartz tolerance of the data transmitter on which the synchronization sub-data packet depends;

exhibit.

In embodiments, the synchronization sub-data packet 160 may instead of on a fixed, dedicated synchronization frequency channel, also on a synchronization relative to the frequency channels 164 in which the plurality of sub-data packets 142 are transmitted in accordance with the time / frequency hopping pattern 140 Frequency channel 162 are transmitted.

In other words, the synchronization frequency channel 162 can also be fixed relative to the remaining hopping pattern 140, but not independently of it in a dedicated channel. For example in dual-band mode, where the synchronization is transmitted on two different channels without repetition (receiver can either listen to only one channel or must receive both in parallel). So it is possible that either the dedicated channel is used or is sent relative to the rest of the hopping pattern.

5 shows in a diagram an exemplary assignment of the transmission channel between data transmitter 100 and data receiver 110 during the transmission of a plurality of sub-data packets 142 according to a time / frequency hopping pattern 140 distributed over time and on different frequency channels 164 and the transmission of a synchronization Sub-data packet 160 on a fixed, dedicated synchronization frequency channel 162, according to a further exemplary embodiment.

In exemplary embodiments, the data transmitter 100 can be designed to subject the data to channel coding and to divide it into the plurality of sub-data packets 142 in such a way that only a second group 172 of sub-data packets 142 is required to decode the data if they are successfully transmitted , and that a higher code gain is achieved in the event of an incorrect transmission by a combination of a first group 170 of sub-data packets and the second group 172 of sub-data packets. The data transmitter 100 can be designed to send the first group 170 of sub-data packets 142 ahead of the second group 172 of sub-data packets 142, wherein the data transmitter 100 can be configured

In exemplary embodiments, the data receiver 110 can be designed to transmit the synchronization sub-data packet 160 on the dedicated, fixed synchronization

Receive frequency channel 162 to obtain the time hopping pattern information and to receive the second group 172 of sub-data packets 142 using the time hopping pattern information 140. Furthermore, the data receiver can be designed to combine and decode the second group of sub-data packets in order to obtain the data.

In exemplary embodiments, the data receiver 110 can be an inexpensive data receiver 110.

For example, a reception bandwidth of the data receiver 110 can be smaller than a bandwidth over which the plurality of sub-data packets 142 are distributed in accordance with the time / frequency hopping pattern 140 in the frequency channels of the frequency band.

For example, data receiver 110 may be a single channel receiver that can receive only one frequency channel of the plurality of frequency channels of frequency band 166 at a time. Thus, the data receiver 110 may be configured to monitor the synchronization frequency channel 162, to receive the synchronization sub-data packet 160 and, after receiving the synchronization sub-data packet 160, between the frequency channels 164 of the frequency band 166 in accordance with the information to switch over the time / frequency hopping pattern 140 to receive the plurality of sub-data packets 142 which are transmitted in accordance with the time / frequency hopping pattern 140 on the respective frequency channels.

In exemplary embodiments, the synchronization sub-data packet 160 can use a receiver that has a low computing power or whose reception bandwidth is smaller than the bandwidth of the telegram splitting signal. As a result, the receiver switches the carrier frequencies when the Telegram splitting signal is received.

In exemplary embodiments, the data receiver 110 (or a radio chip (receiving unit) of the data receiver) can be a so-called hard decision receiver, which is designed to deliver hard-decided bits. The data receiver 110 is thus unable to perform a partial extraction of a frequency channel of the frequency band from the entire received data stream. Rather, the data receiver can only receive on one frequency channel at a time.

A so-called low-performance receiver can thus be used in exemplary embodiments. This uses (for example exclusively) the synchronization sub-data packet 160 for the detection of the telegrams. As a result, less bandwidth is required for detection and the receiver can become less expensive. If a synchronization sub-data packet 160 is received, the receiver switches its carrier frequency between the subsequent sub-data packets in accordance with the signaled time / frequency hopping pattern in order to be able to receive the telegram.

In contrast, a so-called high-performance receiver does not use the synchronization sub-data packet or only as additional information for detecting the telegrams (or a plurality of sub-data packets 142). This results in a higher probability of detection, but a receiver is required which can permanently receive the signal in full bandwidth.

Further exemplary embodiments are described below.

In exemplary embodiments, a TSMA method can be preceded by a first sub-data packet (synchronization sub-data packet 160) on a frequency channel 162 known in advance to the receiver 110, in which the time-frequency hopping pattern 1 0 of subsequent sub-data packets 142 is transmitted , are used.

In exemplary embodiments, a synchronization sub-data packet 160 can be transmitted in a TSMA-based transmission system for the transmission of data packets 142 on a frequency channel 162 known in advance to the receiver 110, which contains information about the time-frequency hopping pattern 140 (hereinafter) sub- Contains data packets 142.

In exemplary embodiments, the transmission of the synchronization sub-data packet 160 can take place on a fixed (not only “previously known”) frequency channel 162 or only on fewer channels than the otherwise used channels.

In embodiments, the synchronization sub-data packet 160 may be one

Synchronization sequence included, the receiver 1 10 a time, frequency and

Phase synchronization and detection of the synchronization sub-data packet enables.

In exemplary embodiments, in order to minimize interference from other subscribers, the frequency channel 162 on which the synchronization sub-data packet 160 is transmitted cannot be used to transmit further (subsequent) sub-data packets 142 (also not by other subscribers).

In exemplary embodiments, the bandwidth of the frequency channel 162 for the synchronization sub-data packet 160 can deviate from the bandwidth of the frequency channels 164 of the subsequent sub-data packets 142. In particular, a lower bandwidth than the available receiver bandwidth can be selected for the transmission of the synchronization sub-data packet 160, in order to take into account potential deviations in the transmission frequency of the transmitters (oscillator inaccuracy).

In the case of exemplary embodiments, a different type of modulation can be used for the synchronization sub-data packet 160, which is simpler and possibly more tolerant to frequency offset, such as a spreading method.

In exemplary embodiments, transmission duration, transmission power, modulation capacity, type of modulation, pilot sequence (synchronization sequence) and coding protection and coding type for the synchronization sub-data packet 160 may differ from the corresponding features of the following sub-data packets 142.

In exemplary embodiments, the synchronization sub-data packet 160 can be transmitted with increased transmission power and / or higher coding protection.

In exemplary embodiments, the synchronization sub-data packet 160 can be transmitted in a different frequency band than the other sub-data packets 142. As a result, it can be transmitted, for example, in a frequency band in which radiation can be emitted with higher power, but which is too narrow-band to offer the desired total transmission capacity.

In exemplary embodiments, the first sub-data packet (synchronization sub-data packet 160) can be repeated one or more times before the transmission of the subsequent data packets 142 in order to increase the reception probability (the number and spacing of the repetitions are known to the receiver).

In exemplary embodiments, the first sub-data packet (synchronization sub-data packet 160) can be divided into a number of sub-sub-data packets.

The first sub-data packet (synchronization sub-data packet 160) can in turn be divided into a number of sub-sub-data packets (TSMA principle), wherein transmission pauses of different lengths can occur between the sub-sub-data packets (pure time jump pattern). The sub-sub data packets can also contain previously known frequency hopping patterns within the bandwidth of the assigned frequency channel in addition to the above-mentioned time hopping patterns in the receiver.

In the case of a division of the first sub-data packet (synchronization sub-data packet 160) into a plurality of sub-sub-data packets, the transmission of the sub-sub-data packets can not only be carried out on different sub-frequencies within that provided for synchronization sub-data packets Frequency channels take place, but also on different frequency channels. A first partial-sub data packet can be transmitted, for example, in a frequency band or frequency channel with a higher permissible transmission power, so that the detection probability of the receiver 110 is improved. The transmission of the first sub-sub-data packet (synchronization sub-data packet 160) can take place with a fixed, previously known waveform, ie without any transmitter-specific information.

2. Activation information in the synchronization sub-data packet.

During the time in which a single-channel data receiver in a TSMA-based transmission system completely receives a message with a time-frequency hopping pattern (ie "follows" the hopping patterns), reception on other frequency channels than the currently selected one is not possible the receiver 1 10 blocks during this time for the reception of data packets from other transmitters, which is disadvantageous if the data packet just received is irrelevant for the receiver.

In order to ensure at the earliest possible point in time that a transmitted data packet is actually relevant for the receiver 110, a synchronization sub-data packet (synchronization sub-data packet 160) sent first or early is used in addition to the information about the time frequency This pattern information is used by the receiver 110 to decide whether the subsequent sub-data packets 142 of the transmitter 100 are received or ignored (so that it can continue to be ready to receive synchronization sub-data packets 160 of other transmitters). The willingness to receive is significantly increased.

The activation information of the first sub-data packet (synchronization sub-data packet 160) can have the following properties:

• General information, such as a general indicator (flag), whether the following sub-data packets should be received;

· Sender-specific information, for example the sender can transmit explicit information about his identity (e.g. sender ID);

• transmitter group-specific information, for example the transmitter can transmit information about its affiliation with a specific group of transmitters / subscribers (for example transmitter group ID);

· Sender-specific or group-specific information using the hash function, for example, the sender can transmit a hash using his sender ID.

Only if the above-mentioned features match a corresponding list that is stored in the data receiver 110, are the data packets completely received and, if appropriate, further activities triggered (see explanations on “repeaters” in the next section).

In an equivalent manner, the activation information can be designed in such a way that only a specific individual recipient or a recipient group is addressed.

A combination of transmitter and receiver-specific information can also be transmitted, so that an assignment between transmitters or transmitter groups and receivers or receiver groups can take place.

In addition to the activation information, the first sub-data packet (or synchronization sub-data packet 160) can also contain further information that configures the subsequent TSMA-based transmission:

• data rate

• Channel code and code rate

• Modulation alphabet or type of modulation

· Pilot sequence

• Information about frequency offset and / or time offset

• Quartz tolerances

3. Repeater functionality.

In exemplary embodiments, the data receiver 1 10 can be a repeater 1 10, which is designed to split data that is divided into a plurality of sub-data packets 142

are distributed in accordance with a time frequency hopping pattern 140, in order to receive a plurality of received sub-data packets, wherein there are transmission pauses between the plurality of sub-data packets during which transmission is not possible, wherein the repeater 110 can be formed, to repeatedly transmit the data by sending out a plurality of repeated sub-data packets in accordance with a repeated time / frequency hopping pattern, wherein there are transmission pauses between the plurality of repeated sub-data packets in which no transmission takes place.

In other words, the data receiver 110 can have the function of a “repeater” which processes the data received from an original data transmitter 100 and retransmits it. This may be necessary if the signal of the data transmitter 100 at the actual data receiver no longer matches that for the strength required for error-free reception.

FIG. 6 shows a schematic block diagram of a system with a data transmitter 100 and a repeater 110 and a transmission channel 11 between data transmitter 100 and repeater 110. In other words, FIG. 6 shows the basic repeater function. In this case, the data transmitter 100 sends a signal 602 and, based on the signal 603 received by the repeater, the information contained in the transmitted data 601 is recovered, processed and retransmitted (forwarded signal 604).

Possible functions of the repeater 1 10 with TSMA-based transmission are described below.

In exemplary embodiments, the repeater 110 can be designed to retransmit the plurality of received sub-data packets 142 sub-data packet by packet in order to transmit the plurality of repeated sub-data packets.

In other words, in exemplary embodiments, the data of the sub-data packets 142 can be repeated sub-data packet-wise (ie sub-data packet for sub-data packet). It is not necessary to decode the entire data packet (which is distributed over the plurality of sub-data packets 142). The minimum delay introduced by repeater 110 consists in the duration of the respective sub-data packet 142, which are received and demodulated individually by repeater 110. Based on the estimated reception symbols, a new transmission signal is generated by modulation in the repeater 1 10.

The repeater 1 10 does not necessarily have to decode the content of the entire data packet.

In embodiments, repeater 110 may be configured to combine and decode the plurality of received sub-data packets 142 to obtain the data, and to re-encode the data and divide it between the plurality of repeated sub-data packets.

In other words, in exemplary embodiments, the repeater 110 can only transmit the sub-data packets after all sub-data packets 142 of the data transmitter 100 have been received and the entire data packet (which is distributed over the plurality of sub-data packets 1 2) has been decoded (repeated plurality of sub-data packets) begin. The minimum delay introduced by the repeater 110 consists of the duration of the entire data packet or at least the duration of the number of sub-data packets that are at least necessary for successful decoding. The repeater 1 10 decodes the transmitted data completely and generates a new transmission signal on the basis of the new coding and modulation.

In exemplary embodiments, the data can be encoded and distributed to the plurality of sub-data packets 142 such that, in the event of an error-free transmission, only a first group of sub-data packets of the plurality of sub-data packets 142 is required for the successful decoding of the data, and in that error-prone decoding, a combination of the first group of sub-data packets 142 and a second group of sub-data packets 142 results in an increased code gain. In this case, the repeater 110 can be designed to decode the first group of received sub-data packets 142 and, if the decoding was successful, to re-encode the data and to split and transmit it at least to a first group of repeated sub-data packets ,

In other words, in the case of exemplary embodiments, for example in the case of good reception conditions, the message (which is distributed over the plurality of sub-data packets 142) can be decoded as soon as part of the sub-data packets 142 is received. This can be used by repeater 110 to send the remaining sub-data packets 142 of the initial transmission superimposed on the repeater signal. This can reduce the channel occupancy, since the channel is partially overlaid by both transmissions. After the superimposed transmission of the remaining sub-data packets

the sub-data packets received and decoded by repeater 1 10 can optionally be sent out.

In embodiments, the repeater 110 may be configured to combine and decode the plurality of received sub-data packets 142 to receive the data, and to re-encode the data and information derived therefrom onto the plurality of repeated sub-data packets split up.

In other words, in the case of exemplary embodiments, information about the symbols received can also be generated and then passed on. So not the reconstructed symbols of the sub-data packets or the entire decoded telegram, but other information derived from the received symbols (eg "Compress and Forward").

In exemplary embodiments, the repeater 110 can be designed to re-encode the data in such a way and to divide it into the plurality of repeated sub-data packets in such a way that the plurality of sub-data packets 142 and the plurality of repeated sub-data packets can be at least partially combined with one another on the receiver side to get a higher code gain. Furthermore, the repeater 110 can be designed to send out the plurality of repeated sub-data packets in accordance with the repeated time / frequency hopping pattern such that the time / frequency hopping pattern 140 and the repeated time frequency hopping pattern result in a combined time / frequency hopping pattern that is common to the receiver is receivable.

In other words, the repeated sub-data packets can be transmitted in such a way that, together with the original transmission (ie the plurality of sub-data packets), they again result in a jump pattern. This makes it possible to provide an original transmission that the repeater 110 received with additional parity information if it is assumed that a usable part of the original transmission still arrives at the data receiver.

In contrast to the actual receiver of the data (e.g. a base station), the repeater 1 10 does not necessarily have to repeat all or the majority of the signals it receives, but in particular the signals of the transmitters which, in the actual data receiver, do not have the strength required for error-free transmission arrive. The "activation information" (see section 2) is of central importance for this, since it allows the repeater 1 10 to only repeat the signals of certain data transmitters and thus not to load the entire system with unnecessary load.

3.1 Basic function

In exemplary embodiments, a repeater 110 can receive the subsequent sub-data packets on the basis of the information about the time-frequency hopping pattern 140 transmitted in the first sub-data packet (synchronization sub-data packet 160). To do this, he only needs a one-channel receiver (effort saving, cost reduction), which is set according to the hopping pattern to the frequency channels used in each case.

In exemplary embodiments, the repeater can receive the signal belonging to a sub-data packet, demodulate it and estimate the symbols contained therein and generate a new transmission signal on the basis of the estimated symbols. This signal can be sent as a sub-data packet (with a time delay) (variant with lower latency) without the need for cross-sub-packet processing (such as decoding the entire data packet).

In exemplary embodiments, the repeater can receive all or the majority of the signal sequences belonging to an entire data packet, estimate from them all or the majority of the reception symbols belonging to the data packet and decode the entire data packet. In the event of successful decoding, the source data of the transmitter now present are re-encoded and modulated. A corresponding data packet, consisting of a plurality of sub-data packets, can be sent (time-delayed) (variant with higher latency, but better reception security). If a data packet is not decoded correctly, the repeater does not send it out.

In embodiments, the repeater can send the sub-data packets with the same or a different time-frequency hopping pattern as the data transmitter.

In exemplary embodiments, the repeater 110 cannot retransmit all sub-data packets, but only a part of the sub-data packets (load reduction with good reception conditions).

In exemplary embodiments, the repeater 110 can transmit the first sub-data packet (synchronization sub-data packet 160) on a different frequency channel than the data transmitter.

In exemplary embodiments, the repeater 100 cannot transmit the first sub-data packet (synchronization sub-data packet 160), but the subsequent sub-data packets.

In exemplary embodiments, the repeater can modify the information of the first sub-data packet before it is sent (see also section 3, exemplary embodiment with the

"Repetition flag / counter").

In exemplary embodiments, the repeater can transmit the sub-data packets 142 in a different frequency band than the data transmitter.

3.2 Activation / control of the repeater function

In the case of exemplary embodiments, analogous to section 2, the activation information contained in the first sub-data packet (synchronization sub-data packet 160) can be used to decide whether the received data packet is transmitted by the repeater 110.

In exemplary embodiments, the repeater 1 10 can thus be configured such that only the packets (data packet which is transmitted divided over the plurality of sub-data packets 142) of selected individual transmitters (data transmitter 100) or a defined group of transmitters are repeater 110 be repeated.

In exemplary embodiments, the first sub-data packet (synchronization sub-data packet 160) can additionally contain information as to whether or how often the entire packet (data packet that is transmitted divided over the plurality of sub-data packets 142) has already been repeated. If a packet is repeated by a repeater, the associated information in the first sub-data packet (synchronization sub-data packet 160) is modified accordingly.

In exemplary embodiments, the repeater 110 can use the information in the first sub-data packet (synchronization sub-data packet 160) to create a list of receivable transmitters. The list is created on the basis of the transmitter ID, transmitter group ID or a hash function (see section 2) and transmitted to a control unit (eg base station). On the basis of this information, the control unit informs the repeater of the data transmitters for which the transmitted packets are to be repeated.

Although some aspects have been described in connection with a device, it goes without saying that these aspects also represent a description of the corresponding method, so that a block or a component of a device is also to be understood as a corresponding method step or as a feature of a method step. Analogously, aspects that have been described in connection with or as a method step also represent a description of a corresponding block or detail or feature of a corresponding device. Some or all of the method steps can be carried out by a hardware apparatus (or using a H a rdwa re apparatus), such as a microprocessor, a programmable computer or an electronic circuit.

A signal coded according to the invention, such as an audio signal or a video signal or a transport stream signal, can be stored on a digital storage medium or can be transmitted on a transmission medium such as a wireless transmission medium or a wired transmission medium, for example the Internet

The encoded audio signal according to the invention can be stored on a digital storage medium or can be transmitted on a transmission medium, such as a wireless transmission medium or a wired transmission medium, such as the Internet.

Depending on the specific implementation requirements, exemplary embodiments of the invention can be implemented in hardware or in software. The implementation can be carried out using a digital storage medium such as a floppy disk, DVD, Blu-ray disc, CD, ROM, PROM, EPROM, EEPROM or FLASH memory, hard disk or other magnetic or optical memory are carried out, on which electronically readable control signals are stored, which can cooperate with a programmable computer system or cooperate in such a way that the respective method is carried out. The digital storage medium can therefore be computer-readable.

Some exemplary embodiments according to the invention thus comprise a data carrier which has electronically readable control signals which are able to communicate with a

programmable computer system to cooperate such that one of the methods described herein is performed.

In general, exemplary embodiments of the present invention can be implemented as a computer program product with a program code, the program code being effective to carry out one of the methods when the computer program product runs on a computer.

The program code can, for example, also be stored on a machine-readable medium.

Other embodiments include the computer program for performing one of the methods described herein, the computer program being stored on a machine readable medium.

In other words, one exemplary embodiment of the method according to the invention is thus a computer program which has a program code for performing one of the methods described here when the computer program runs on a computer.

A further exemplary embodiment of the method according to the invention is thus a data carrier (or a digital storage medium or a computer-readable medium) on which the computer program for carrying out one of the methods described herein is recorded. The data carrier, the digital storage medium or the computer-readable medium are typically objective and / or non-transitory or non-temporary.

A further exemplary embodiment of the method according to the invention is thus a data stream or a sequence of signals which represents the computer program for performing one of the methods described herein. The data stream or the sequence of signals can, for example, be configured to be transferred via a data communication connection, for example via the Internet.

Another exemplary embodiment includes a processing device, for example a computer or a programmable logic component, which is configured or adapted to carry out one of the methods described herein.

Another embodiment includes a computer on which the computer program for performing one of the methods described herein is installed.

A further exemplary embodiment according to the invention comprises a device or a system which is designed to transmit a computer program for carrying out at least one of the methods described herein to a receiver. The transmission can take place electronically or optically, for example. The receiver can be, for example, a computer, a mobile device, a storage device or a similar device. The device or the system can comprise, for example, a file server for transmitting the computer program to the recipient.

In some embodiments, a programmable logic device (e.g., a field programmable gate array, an FPGA) can be used to perform some or all of the functionality of the methods described herein. In some embodiments, a field programmable gate array may cooperate with a microprocessor to perform one of the methods described herein. Generally, in some embodiments, the methods are performed by any hardware device. This can be a universally usable hardware such as a computer processor (CPU) or hardware specific to the method, such as an ASIC.

For example, the devices described herein can be implemented using a hardware apparatus, or using a computer, or using a combination of a hardware apparatus and a computer.

The devices described herein, or any components of the devices described herein, may at least partially be implemented in hardware and / or in software (computer program).

For example, the methods described herein may be implemented using hardware equipment, or using a computer, or using a combination of a hardware apparatus and a computer.

The methods described herein, or any components of the methods described herein, can be performed at least in part by hardware and / or software.

The above-described embodiments are merely illustrative of the principles of the present invention. It is to be understood that modifications and variations in the arrangements and details described herein will be apparent to those skilled in the art. Therefore, it is intended that the invention be limited only by the scope of the following claims and not by the specific details presented based on the description and explanation of the exemplary embodiments herein.

Claims

Data transmitter which is designed to divide data into a plurality of sub-data packets and to transmit at least a part of the plurality of sub-data packets in accordance with a time-frequency hopping pattern, wherein there are transmission pauses between the sub-data packets in which no transmission takes place ;

the data transmitter being designed to transmit a synchronization sub-data packet on a fixed synchronization frequency channel;

wherein the synchronization frequency channel and frequency channels in which the plurality of sub-data packets are mainly transmitted according to the time / frequency hopping pattern are different.

A data transmitter as claimed in the preceding claim, wherein the synchronization sub-data packet has information about the time / frequency hopping pattern.

A data transmitter according to the preceding claim, wherein the synchronization sub-data packet comprises the information about the time frequency hopping pattern in at least one

a data field within the synchronization sub-data packet;

at least part of error protection data;

at least part of a synchronization sequence for synchronization of the synchronization sub-data packet in a data receiver;

a jump pattern according to which the synchronization sub-data packet is distributed over at least two synchronization sub-data packets and is distributed in time and frequency;

a jump pattern between the transmission of the synchronization sub-data packet and a repeated transmission of the synchronization sub-data packet;

a data rate of the synchronization sub-data packet;

a channel code of the synchronization sub-data packet;

a code rate of the synchronization sub-data packet;

a modulation alphabet of the synchronization sub-data packet;

a type of modulation of the synchronization sub-data packet;

a frequency offset of the synchronization sub-data packet;

a time offset of the synchronization sub-data packet; and

a quartz tolerance of the data transmitter on which the synchronization sub-data packet depends;

having.

4. Data transmitter according to one of the preceding claims, wherein the synchronization sub-data packet is transmitted synchronized in time with the plurality of sub-data packets.

5. Data transmitter according to one of the preceding claims 1 to 4, wherein the data transmitter is designed to transmit the synchronization sub-data packet in time before the plurality of sub-data packets.

6. Data transmitter according to one of the preceding claims 1 to 4, wherein the data transmitter is designed to encode the data channel and to divide it into the plurality of sub-data packets in such a way that only a second group of sub-data packets upon successful transmission of the same Decoding of the data is required, and a higher code gain is achieved in the event of an incorrect transmission by a combination of a first group of sub-data packets and the second group of sub-data packets;

wherein the data transmitter is configured to transmit the first group of sub-data packets in time before the second group of sub-data packets, and wherein the data transmitter is configured to transmit the synchronization sub-data packet after the first group of sub-data packets and before to send the second group of sub-data packets.

7. Data transmitter according to one of the preceding claims, wherein the data transmitter is designed to send the synchronization sub-data packet instead of a sub-data packet of the plurality of sub-data packets.

8. Data transmitter according to one of the preceding claims, wherein the synchronization sub-data packet is one of the plurality of sub-data packets.

9. Data transmitter according to one of the preceding claims, wherein the synchronization sub-data packet a synchronization sequence

Has synchronization of the synchronization sub-data packet in a data receiver.

Data transmitter according to one of the preceding claims, wherein the data transmitter is designed to transmit only the synchronization sub-data packet in the synchronization frequency channel.

Data transmitter according to one of the preceding claims, wherein the data transmitter is designed to transmit the synchronization sub-data packet with a different bandwidth than the plurality of sub-data packets.

Data transmitter according to one of the preceding claims, wherein the data transmitter is designed to transmit the synchronization sub-data packet at a different symbol rate than the plurality of sub-data packets.

Data transmitter according to one of the preceding claims, wherein the data transmitter is designed to transmit the synchronization sub-data packet with a different modulation type than the plurality of sub-data packets.

Data transmitter according to one of the preceding claims, wherein the data transmitter is designed to transmit the synchronization sub-data packet with a different transmission power than the plurality of sub-data packets.

Data transmitter according to one of the preceding claims, wherein the data transmitter is designed to provide the synchronization sub-data packet with a different channel coding or a channel coding with a different error protection than the plurality of sub-data packets.

Data transmitter according to one of the preceding claims, wherein the synchronization frequency channel and the frequency channels in which the plurality of sub-data packets are transmitted are channels of a frequency band which is assigned to the data transmitter.

17. Data transmitter according to one of the preceding claims, wherein the synchronization frequency channel and the frequency channels in which the plurality of sub-data packets are transmitted are channels of different frequency bands.

18. Data transmitter according to one of the preceding claims, wherein the data transmitter is designed to repeatedly transmit the synchronization sub-data packet.

19. Data transmitter according to one of the preceding claims, wherein the data transmitter is designed to transmit the synchronization sub-data packet to at least two

Split synchronization sub-sub-data packets and send them at a time interval, so that there are pauses between the synchronization sub-sub-data packets in which there is no transmission.

20. Data transmitter according to the preceding claim, wherein the data transmitter is designed to send the at least two synchronization sub-sub-data packets in different dedicated synchronization frequency channels.

21. Data transmitter according to the preceding claim, wherein the data transmitter is designed to transmit the at least two synchronization sub-sub-data packets in the different dedicated synchronization frequency channels with different transmission powers.

22. Data transmitter according to one of the preceding claims 19 to 21, wherein the data transmitter is designed to transmit the at least two synchronization sub-sub-data packets within the bandwidth of the same synchronization frequency channel with different transmission frequencies.

23. Data transmitter according to one of the preceding claims 19 to 22, wherein one of the at least two synchronization sub-sub-data packets is one

Has synchronization sequence, and wherein a second of the at least two synchronization sub-sub-data packets has information about the time / frequency hopping pattern with which the plurality of sub-data packets are sent.

24. Data transmitter according to one of the preceding claims, wherein the synchronization sub-data packet has activation information by means of which a data receiver can determine whether the data sent by means of the plurality of sub-data packets is intended for the data receiver or for further processing are provided in the data receiver

A data transmitter as claimed in the preceding claim, wherein the activation information is at least one of

an indicator that indicates whether the data should be received;

an address information of the data transmitter or one derived from it

Information;

an address information of a group of data transmitters to which the data transmitter is assigned, or information derived therefrom;

an address information of the data receiver or information derived therefrom; and

an address information of a group of data receivers to which the data receiver is assigned, or information derived therefrom.

Data transmitter according to one of the preceding claims, wherein the synchronization sub-data packet has configuration information for receiving the plurality of sub-data packets.

A data transmitter according to the preceding claim, wherein the configuration information is at least one of

a data rate;

a channel code;

a code rate;

a modulation alphabet;

a type of modulation;

a pilot sequence;

a frequency offset;

a time offset; and

a quartz tolerance.

Data transmitter which is designed to divide data into a plurality of sub-data packets and to transmit the plurality of sub-data packets in accordance with a time-frequency hopping pattern in a plurality of frequency channels, wherein there are transmission pauses between the sub-data packets in which there are not is sent;

the data transmitter being designed to transmit a synchronization sub-data packet on a synchronization frequency channel which is fixed relative to the frequency channels in which the plurality of sub-data packets are transmitted in accordance with the time frequency hopping pattern.

Data receiver which is designed to receive data which is distributed over a plurality of sub-data packets and is transmitted in accordance with a time-frequency hopping pattern, wherein there are transmission pauses between the sub-data packets in which transmission is not carried out;

wherein the data receiver is designed to receive a synchronization sub-data packet on a fixed synchronization frequency channel;

wherein the synchronization frequency channel and frequency channels in which the plurality of sub-data packets are mainly transmitted in accordance with the time frequency hopping pattern are different.

A data receiver as claimed in the preceding claim, wherein the synchronization sub-data packet comprises information about the time frequency hopping pattern with which the plurality of sub-data packets are transmitted;

wherein the data receiver is designed to receive the plurality of sub-data packets using the information about the time-frequency hopping pattern.

A data receiver according to the preceding claim, wherein the data receiver is configured to extract the information about the time frequency hopping pattern from at least one

a data field within the synchronization sub-data packet;

at least part of error protection data;

at least part of a synchronization sequence for synchronization of the synchronization sub-data packet in a data receiver;

a hopping pattern according to which the synchronization sub-data packet is sent divided over at least two synchronization sub-data packets in time and frequency;

a jump pattern between the transmission of the synchronization sub-data packet and a repeated transmission of the synchronization sub-data packet;

a data rate of the synchronization sub-data packet;

a channel code of the synchronization sub-data packet;

a code rate of the synchronization sub-data packet;

a modulation alphabet of the synchronization sub-data packet; a type of modulation of the synchronization sub-data packet;

a frequency offset of the synchronization sub-data packet;

a time offset of the synchronization sub-data packet; and

a quartz tolerance of the data transmitter on which the synchronization sub-data packet depends;

to extract.

32. Data receiver according to one of the preceding claims, wherein the synchronization sub-data packet is transmitted synchronized in time with the plurality of sub-data packets;

wherein the data receiver is designed to receive the plurality of sub-data packets synchronized in time with the synchronization sub-data packet.

33. Data receiver according to one of the preceding claims 29 to 32, wherein the data receiver is designed to receive the synchronization sub-data packet before the plurality of sub-data packets.

34. Data receiver according to one of the preceding claims 29 to 32, wherein the data are channel-coded and are divided into the plurality of sub-data packets in such a way that only a second group of sub-data packets is required for successful transmission of the same to decode the data, and that in the event of an incorrect transmission, a combination of a first group of sub-data packets and the second group of sub-data packets results in a higher code gain;

wherein the first group of sub-data packets is transmitted before the second group of sub-data packets, and wherein the synchronization sub-data packet is transmitted after the first group of sub-data packets and before the second group of sub-data packets;

wherein the synchronization sub-data packet has information about the time / frequency hopping pattern with which the second group of sub-data packets is transmitted;

the data receiver being designed to receive the second group of sub-data packets using the information about the time / frequency hopping pattern.

35. Data receiver according to the preceding claim, wherein the data receiver is designed to combine and decode the second group of sub-data packets to obtain the data.

36. Data receiver according to one of the preceding claims, wherein a reception bandwidth of the data receiver is smaller than a bandwidth over which the plurality of sub-data packets are distributed in accordance with the time frequency hopping pattern in the frequency channels of the frequency band.

37. Data receiver according to one of the preceding claims, wherein the data receiver has a receiving unit which is designed to output hard-decided bits.

38. Data receiver according to one of the preceding claims 30 to 37, wherein the data receiver is a single-channel receiver which can receive only one frequency channel of a plurality of frequency channels of a frequency band at the same time;

the data receiver being configured to switch between the frequency channels of the frequency band in accordance with the information about the time / frequency hopping pattern in order to receive the plurality of sub-data packets which are transmitted in accordance with the time / frequency hopping pattern on the respective frequency channels.

39. A data receiver according to the preceding claim, wherein the data receiver is configured to monitor the synchronization frequency channel in order to receive the synchronization sub-data packet;

and wherein the data receiver is configured to switch between the frequency channels of the frequency band according to the information about the time / frequency hopping pattern after receiving the synchronization sub-data packet to receive the plurality of sub-data packets

in accordance with the time / frequency control pattern on the respective frequency channels.

Data receiver according to one of the preceding claims, wherein the synchronization sub-data packet has a synchronization sequence for synchronization of the synchronization sub-data packet in a data receiver;

wherein the data receiver is configured to the synchronization sub-data packet using a reference synchronization sequence in one

Detect received data stream.

41. Data receiver according to one of the preceding claims, wherein the data receiver is designed to receive only the synchronization sub-data packet on the synchronization frequency channel.

42. Data receiver according to one of the preceding claims, wherein the data receiver is designed to receive the synchronization sub-data packet with a lower bandwidth than the plurality of sub-data packets.

43. Data receiver according to one of the preceding claims, wherein the data receiver is designed to receive the synchronization sub-data packet using a different type of modulation than the plurality of sub-data packets.

44. Data receiver according to one of the preceding claims, wherein the synchronization sub-data packet is transmitted with a different transmission power than the plurality of sub-data packets.

Data receiver according to one of the preceding claims, wherein the synchronization sub-data packet is provided with a different channel coding or a channel coding with a different error protection than the plurality of sub-data packets.

46. ​​Data receiver according to one of the preceding claims, wherein the synchronization frequency channel and the frequency channels in which the plurality of

Sub-data packets are transmitted, are channels of a frequency band that is assigned to the data transmitter and the data receiver.

47. Data receiver according to one of the preceding claims, wherein the synchronization frequency channel and the frequency channels in which the plurality of sub-data packets are transmitted are channels of different frequency bands.

48. Data receiver according to one of the preceding claims, wherein the synchronization sub-data packet is transmitted repeatedly;

wherein the data receiver is configured to receive the plurality of sub-data packets based on at least one of the repeatedly transmitted synchronization sub-data packets or a combination of the repeatedly transmitted synchronization sub-data packets.

49. Data receiver according to one of the preceding claims, wherein the synchronization sub-data packet is divided into at least two synchronization sub-data packets and transmitted at a time interval, so that there are transmission pauses between the synchronization sub-data packets, in which there is no transmission.

50. Data receiver according to the preceding claim, wherein the data receiver is designed to receive the at least two synchronization sub-sub-data packets on different dedicated synchronization frequency channels.

51. Data receiver according to the preceding claim 50, wherein the at least two synchronization sub-sub-data packets are transmitted on the different dedicated synchronization frequency channels with different transmission powers.

52. Data receiver according to the preceding claim 50, wherein the data receiver is designed to receive the at least two synchronization sub-sub-data packets within the bandwidth of the same synchronization frequency channel with different transmission frequencies.

53. Data receiver according to one of the preceding claims 49 to 52, wherein the data receiver is designed to receive and combine the at least two synchronization sub-data packets in order to obtain the synchronization sub-data packet.

53. Data receiver according to one of the preceding claims 49 to 53, wherein one of the at least two synchronization sub-data packets has a synchronization sequence, and wherein a second of the at least two synchronization sub-data packets has information about the time / frequency hopping pattern, with which the plurality of sub-data packets are sent;

wherein the data receiver is configured to use the first of the at least two synchronization sub-sub-data packets

Detect reference synchronization sequence in a receive data stream, and in order to receive the at least one further synchronization sub-sub data packet based on a known time / frequency spacing between the at least two synchronization sub-sub data packets, in order to obtain information about the time / frequency hopping pattern to obtain.

A data receiver according to any one of the preceding claims, wherein the synchronization sub-data packet has activation information by means of which a data receiver can determine whether the data which are transmitted by means of the plurality of sub-data packets are intended for the data receiver;

wherein the data receiver is designed to determine, based on the activation information, whether the data that are sent by means of the plurality of sub-data packets are intended for the data receiver and, if the data are intended for the data receiver, the plurality of sub-packets - Receive data packets.

A data receiver according to the preceding claim, wherein the activation information is at least one of

an indicator that indicates whether the data should be received;

an address information of the data transmitter or one derived from it

Information;

an address information of a group of data transmitters to which the data transmitter is assigned, or information derived therefrom;

an address information of the data receiver or information derived therefrom; and

an address information of a group of data receivers to which the data receiver is assigned, or information derived therefrom.

57. Data receiver according to one of the preceding claims, wherein the synchronization sub-data packet has configuration information for receiving the plurality of sub-data packets;

wherein the data receiver is designed to receive the plurality of sub-data packets in accordance with the configuration information.

58. Data receiver according to the preceding claim, wherein the configuration information is at least one of

a data rate;

a channel code;

a code rate;

a modulation alphabet;

a type of modulation;

a pilot sequence;

a frequency offset;

a time offset; and

a quartz tolerance.

59. Data receiver according to one of the preceding claims, wherein the data receiver is a data receiver that can receive data at the same time only on one frequency channel.

60. Data receiver, which is designed to receive data distributed over a plurality of sub-data packets distributed according to a time / frequency hopping pattern distributed in a plurality of frequency channels, wherein there are transmission pauses between the sub-data packets in which is not broadcast;

the data receiver being designed to receive a synchronization sub-data packet on a synchronization frequency channel which is fixed relative to the frequency channels in which the plurality of sub-data packets are transmitted in accordance with the time / frequency hopping pattern.

61. Repeater, which is designed to receive data distributed over a plurality of sub-data packets distributed in accordance with a time / frequency hopping pattern, to receive a plurality of received sub-data packets, between the plurality of sub-data packets There are transmission pauses in which there is no transmission;

wherein the repeater is designed to transmit the data repeatedly by sending a plurality of repeated sub-data packets in accordance with a repeated time / frequency hopping pattern, wherein there are transmission pauses between the plurality of repeated sub-data packets in which transmission is not carried out.

62. The repeater according to the preceding claim 61, wherein the repeater is designed to retransmit the plurality of received sub-data packets sub-data packet by packet in order to transmit the plurality of repeated sub-data packets.

63. The repeater according to the preceding claim 61, wherein the repeater is designed to combine and decode the plurality of received sub-data packets to obtain the data;

wherein the repeater is designed to re-encode the data and to divide it between the plurality of repeated sub-data packets.

64. The repeater according to the preceding claim 61, the repeater being designed to combine and decode the plurality of received sub-data packets to obtain the data;

the repeater being designed to re-encode the data and to divide information derived therefrom into the plurality of repeated sub-data packets.

65. Repeater according to the preceding claim 61, wherein the data is coded and distributed over the plurality of sub-data packets such that only a first group of sub-data packets of the plurality of sub-data packets are required for successful decoding of the data in the event of an error-free transmission and that in the case of a faulty decoding, a combination of the first group of sub-data packets and a second group of sub-data packets results in an increased code gain;

wherein the repeater is designed to decode the first group of received sub-data packets and, if the decoding was successful, the

To re-encode data and to divide and transmit at least a first group of repeated sub-data packets even before a last sub-data packet of the plurality of sub-data packets has been received.

65. The repeater according to the preceding claim 65, the repeater being designed to decode the first group of received sub-data packets and, if the decoding was unsuccessful, the first group of received sub-data packets with the second group of received sub-data packets. Combine and decode data packets to obtain and re-encode the data and split it into the plurality of repeated sub-data packets.

66. The repeater according to one of the preceding claims 63 to 66, wherein the repeater is designed to divide the data into the plurality of repeated sub-data packets in such a way that a number of the repeated sub-data packets is less than a number of the sub-data packets or received sub Data packets.

Repeater according to one of the preceding claims 63 to 67, wherein the repeater is designed to re-encode the data and divide it into the plurality of repeated sub-data packets in such a way that the plurality of sub-data packets and the plurality of repeated sub-data packets on the receiver side are at least partially combinable with one another in order to achieve a higher code gain.

A repeater according to the preceding claim, wherein the repeater is designed to transmit the plurality of repeated sub-data packets in accordance with the repeated time / frequency hopping pattern such that the time / frequency hopping pattern and the repeated time / frequency hopping pattern result in a combined time / frequency hopping pattern that can be received jointly by the receiver.

Repeater according to one of the preceding claims, wherein the repeater is designed to receive a synchronization sub-data packet on a fixed synchronization frequency channel;

wherein the synchronization frequency channel and frequency channels in which the plurality of sub-data packets are mainly transmitted according to the time / frequency hopping pattern are different.

Repeater according to the preceding claim, wherein the repeater is designed to transmit the synchronization sub-data packet again or a newly generated synchronization sub-data packet on the fixed synchronization frequency channel or another fixed synchronization frequency channel.

71. The repeater according to one of the preceding claims 70 to 71, wherein the synchronization sub-data packet has activation information by means of which the repeater can determine whether the data which are sent by means of the plurality of sub-data packets are to be transmitted repeatedly;

wherein the repeater is designed to determine on the basis of the activation information whether the data which are sent by means of the plurality of sub-data packets should be sent out repeatedly and, if the data are sent out repeatedly, the plurality of sub-data packets received and retransmitted using the plurality of repeated sub-data packets.

A repeater according to the preceding claim 72, wherein the activation information is at least one of

an indicator that indicates whether the data should be received;

an address information of the data transmitter or one derived from it

Information;

an address information of a group of data transmitters to which the data transmitter is assigned, or information derived therefrom;

an address information of the data receiver or one derived therefrom

Information;

address information of a group of data receivers to which the data receiver is assigned, or information derived therefrom;

a counter that indicates how often the data has already been sent repeatedly.

74. Repeater according to one of the preceding claims 72 to 73, the repeater being designed to update the activation information and to transmit the updated activation information with the synchronization sub-data packet.

75. Repeater according to one of the preceding claims, wherein the received time / frequency hopping pattern and the repeated time A frequency hopping pattern are the same or different.

76. Repeater according to one of the preceding claims, wherein the repeater is designed to transmit the plurality of repeated sub-data packets in a different frequency band than the plurality of received sub-data packets were received.

77. System with the following features:

a data transmitter according to any one of claims 1 to 28; and

a data receiver according to one of claims 29 to 60, and / or a repeater according to one of claims 61 to 76.

78. A method of sending data, comprising the following steps:

Splitting the data into a plurality of sub-data packets;

Sending the plurality of sub-data packets distributed according to a time / frequency hopping pattern, wherein there are transmission pauses between the sub-data packets in which there is no transmission;

Sending a synchronization sub-data packet on a fixed synchronization frequency channel, the synchronization frequency channel and frequency channels in which the plurality of sub-data packets are mainly transmitted according to the time / frequency hopping pattern being different.

79. A method for receiving data which is distributed over a plurality of sub-data packets and is distributed in accordance with a time frequency hopping pattern, wherein there are transmission pauses between the sub-data packets during which no transmission takes place, the method comprising the following steps:

Receiving the plurality of sub-data packets;

Receiving a synchronization sub-data packet on a fixed synchronization frequency channel, the synchronization frequency channel and frequency channels in which the plurality of sub-data packets are mainly transmitted according to the time / frequency hopping pattern being different.

80. A method for the repeated transmission of data which is distributed over a plurality of sub-data packets and is distributed in accordance with a time-frequency hopping pattern, wherein there are transmission pauses between the sub-data packets during which no transmission takes place, the method comprising the following steps:

Receiving the plurality of sub-data packets;

repeated transmission of the data by transmission of a plurality of repeated sub-data packets in accordance with a repeated time / frequency hopping pattern, wherein there are transmission pauses between the plurality of repeated sub-data packets in which no transmission takes place.

81. Computer program for performing a method according to one of the preceding claims.