​METHOD, APPARATUS AND SYSTEM FOR RECEIVING OR TRANSMITTING SIGNAL
​TECHNICAL FIELD
[0001]
​The present invention relates to the field of communications, and in particular, to a signal receiving or sending method, apparatus, and system.
​BACKGROUND OF THE INVENTION
[0002]
​In a New Radio (5G-NR, 5G-New Radio) system of a fifth generation mobile communication technology, signal transmission of a portion of the service needs to be met at the same time, and requirements for low latency and high reliability are met at the same time. These services include, distributed power system control, smart factories, and remote driving, among others. At present, existing communication systems cannot meet the requirements of these services for high reliability. Therefore, it is necessary to further enhance the reliability of data transmission on the basis of existing communication systems.
[0003]
​On the other hand, the 5G-NR system provides a beam management mechanism based on a Transmission configuration indicator (TCI) state in order to better adapt to transmitting data in a high frequency band.. Specifically, for downlink data Transmission, the network device may configure a physical downlink shared channel (PDSCH) in each downlink Bandwidth Part (BWP) by using Radio Resource Control (RRC) signaling​The TCI state table of the Physical Downlink Shared Channel is 128 entries.. In addition, the network device may use a Media Access Control Control Unit (MAC-CE) signaling to indicate a subset of one of the TCI state tables, an upper limit of the subset of the subset is 8 for a PDSCH scheduled by Downlink Control Information (DCI), the DCI may have a TCI domain, and a size of the TCI field is 3 bits.​The 8 states indicated by the 3 bits are in one-to-one correspondence with 8 entries in the subset of the TCI state tables.. Therefore, the terminal may determine the TCI state used for receiving the corresponding PDSCH according to the indication of the TCI field in the DCI, that is, receive Quasi co-location (QCL) hypothesis parameters used by the corresponding PDSCH.
[0004]
​It should be noted that the above description of the technical background is only for a clear and complete explanation of the technical solutions of the present invention, and it is convenient for a person skilled in the art to understand.. The above technical solutions are not considered to be known to those skilled in the art only because these solutions are set forth in the background section of the present invention.
[0005]
​SUMMARY OF THE INVENTION
[0006]
​In general, a signal in a communication system transmits an indication of discretion of control information. Therefore, the enhancement of the control information can improve the reliability of signal transmission to a great extent.. At present, the main method for increasing the reliability of the control information is to reduce the size of the control information under the condition of using the same time-frequency resource and transmission power. The reason is that when the bit of the control information is reduced, more bits can be used for redundant coding of the channel under the same condition, thereby improving the reliability of the control channel.. In addition, in order to meet the requirements of 5G-NR in the future for different levels of high reliability, the size (number of bits) of the control information may change appropriately according to service requirements.
[0007]
​The inventor finds that, for the above control information, it may schedule the terminal to perform downlink signal reception, and may also schedule the terminal to perform uplink signal transmission. However, when downlink signal scheduling is performed on the control information, how to indicate a QCL assumption of a corresponding downlink signal, how to indicate a spatial relationship of a corresponding uplink signal when uplink signal scheduling is performed on the control information, and how to indicate a path loss reference signal for power control used by a corresponding uplink signal when uplink signal scheduling is performed on the control information, and there is no explicit solution.
[0008]
​In addition, it is assumed that the subcarrier spacing corresponding to the downlink control information (DCI) is K DCI, and the subcarrier spacing corresponding to the physical downlink shared channel (PDSCH)/physical uplink shared channel (PUSCH) scheduled by the DCI is K data.. The subcarrier spacing between them is based on whether K DCI is not determined based on K DCI or K data.​At the same time, since the Scheduling Offset needs to be compared with the terminal capability corresponding to the Scheduling Offset, the subcarrier spacing corresponding to the terminal capability is based on K DCI or K Data.
[0009]
​In order to solve at least one of the above problems or to solve other similar problems, embodiments of the present invention provide a signal receiving or sending method, apparatus and system
[0010]
​According to a first aspect of the embodiments of the present invention, there is provided a signal receiving or sending method, the method being applied to a terminal device, the method comprising:
[0011]
​receiving, by a terminal device, downlink control information sent by a network device, where a field of the downlink control information satisfies at least one of the following conditions:
[0012]
​if the downlink control information is used to schedule a downlink signal, the frequency domain resource allocation field of the downlink control information is less than the domain of the frequency domain resource allocation of the DCI Format 1_0;
[0013]
​if the downlink control information is used to schedule an uplink signal, the frequency domain resource allocation field of the downlink control information is less than the domain of the frequency domain resource allocation of the DCI format 0_0;
[0014]
​A domain resource allocation field is less than 4 bits;
[0015]
​Domain of modulation and coding scheme is less than 5 bits;
[0016]
​a domain of the HARQ process number is less than 4 bits;
[0017]
​The domain of the redundancy version is less than 2 bits;
[0018]
​a domain of the PUCCH resource indicator is less than 3 bits;
[0019]
​the field of the PDSCH-to-HARQ feedback timing indicator is less than 3 bits; and
[0020]
​A field of downlink assignment index is less than 2 bits;
[0021]
​The terminal device receives or transmits a signal scheduled by the downlink control information according to a spatial direction indication of the downlink control information.
[0022]
​According to a second aspect of the embodiments of the present invention, there is provided a signal receiving or sending method, the method being applied to a network device, the method comprising:
[0023]
​sending, by a network device, downlink control information to a terminal device, where a field of the downlink control information satisfies at least one of the following conditions:
[0024]
​if the downlink control information is used to schedule a downlink signal, the frequency domain resource allocation field of the downlink control information is less than the domain of the frequency domain resource allocation of the DCI Format 1_0;
[0025]
​if the downlink control information is used to schedule an uplink signal, the frequency domain resource allocation field of the downlink control information is less than the domain of the frequency domain resource allocation of the DCI format 0_0;
[0026]
​A domain resource allocation field is less than 4 bits;
[0027]
​Domain of modulation and coding scheme is less than 5 bits;
[0028]
​a domain of the HARQ process number is less than 4 bits;
[0029]
​The domain of the redundancy version is less than 2 bits;
[0030]
​a domain of the PUCCH resource indicator is less than 3 bits;
[0031]
​the field of the PDSCH-to-HARQ feedback timing indicator is less than 3 bits; and
[0032]
​A field of downlink assignment index is less than 2 bits;
[0033]
​The downlink control information has a spatial direction indication, and the terminal device instructs to receive or transmit the signal scheduled by the downlink control information according to the spatial direction of the downlink control information.
[0034]
​According to a third aspect of the embodiments of the present invention, there is provided a signal receiving or sending apparatus, the apparatus being configured to a terminal device, the apparatus comprising:
[0035]
​a receiving unit, configured to receive downlink control information sent by a network device, where a field of the downlink control information satisfies at least one of the following conditions:
[0036]
​if the downlink control information is used to schedule a downlink signal, the frequency domain resource allocation field of the downlink control information is less than the domain of the frequency domain resource allocation of the DCI Format 1_0;
[0037]
​if the downlink control information is used to schedule an uplink signal, the frequency domain resource allocation field of the downlink control information is less than the domain of the frequency domain resource allocation of the DCI format 0_0;
[0038]
​A domain resource allocation field is less than 4 bits;
[0039]
​Domain of modulation and coding scheme is less than 5 bits;
[0040]
​a domain of the HARQ process number is less than 4 bits;
[0041]
​The domain of the redundancy version is less than 2 bits;
[0042]
​a domain of the PUCCH resource indicator is less than 3 bits;
[0043]
​the field of the PDSCH-to-HARQ feedback timing indicator is less than 3 bits; and
[0044]
​A field of downlink assignment index is less than 2 bits;
[0045]
​a processing unit, configured to receive or transmit a signal scheduled by the downlink control information according to a spatial direction indication of the downlink control information.
[0046]
​According to a fourth aspect of the embodiments of the present invention, there is provided a signal receiving or transmitting apparatus, the apparatus being configured in a network device, the apparatus comprising:
[0047]
​a sending unit, configured to send downlink control information to a terminal device, where a field of the downlink control information satisfies at least one of the following conditions:
[0048]
​if the downlink control information is used to schedule a downlink signal, the frequency domain resource allocation field of the downlink control information is less than the domain of the frequency domain resource allocation of the DCI Format 1_0;
[0049]
​if the downlink control information is used to schedule an uplink signal, the frequency domain resource allocation field of the downlink control information is less than the domain of the frequency domain resource allocation of the DCI format 0_0;
[0050]
​A domain resource allocation field is less than 4 bits;
[0051]
​Domain of modulation and coding scheme is less than 5 bits;
[0052]
​a domain of the HARQ process number is less than 4 bits;
[0053]
​The domain of the redundancy version is less than 2 bits;
[0054]
​a domain of the PUCCH resource indicator is less than 3 bits;
[0055]
​the field of the PDSCH-to-HARQ feedback timing indicator is less than 3 bits; and
[0056]
​A field of downlink assignment index is less than 2 bits;
[0057]
​The downlink control information has a spatial direction indication, and the terminal device instructs to receive or transmit the signal scheduled by the downlink control information according to the spatial direction of the downlink control information.
[0058]
​According to a fifth aspect of the embodiments of the present invention, there is provided a signal receiving or sending method, the method being applied to a terminal device, the method comprising:
[0059]
​receiving, by a terminal device, downlink control information sent by a network device, where the downlink control information includes a scheduling offset;
[0060]
​receiving, by the terminal device, a downlink signal scheduled by the downlink control information, or sending an uplink signal scheduled by the downlink control information according to a spatial direction indication corresponding to the scheduling offset or a path loss reference signal corresponding to the scheduling offset; and
[0061]
​The threshold corresponding to the scheduling offset and the scheduling offset is determined based on one of the following seed carrier spacing:
[0062]
​receiving the subcarrier spacing for the reception of the DCI;
[0063]
​receiving a subcarrier spacing for the downlink signal scheduled by the downlink control information for the reception of the PDSCH scheduled by the DCI; and
[0064]
​sending the subcarrier spacing for the uplink signal scheduled by the downlink control information for the transmission of the PUSCH scheduled by the DCI.
[0065]
​According to a sixth aspect of the embodiments of the present invention, there is provided a signal receiving or sending method, the method being applied to a network device, the method comprising:
[0066]
​sending, by a network device, downlink control information to a terminal device, where the downlink control information includes a scheduling offset; the scheduling offset corresponds to a spatial direction indication or a corresponding path loss reference signal, and the downlink control information is used by the terminal device to receive a downlink signal scheduled by the downlink control information according to a spatial direction indication corresponding to the scheduling offset or according to a path loss reference signal corresponding to the scheduling offset, or send an uplink signal scheduled by the downlink control information;
[0067]
​The threshold corresponding to the scheduling offset and the scheduling offset is determined based on a subcarrier spacing below:
[0068]
​a subcarrier spacing for receiving the downlink control information;
[0069]
​receiving a subcarrier spacing of the downlink signal scheduled by the downlink control information; and
[0070]
​The subcarrier spacing of the uplink signal scheduled by the downlink control information is sent.
[0071]
​According to a seventh aspect of the embodiments of the present invention, there is provided a signal receiving or sending apparatus, the apparatus being configured to a terminal device, the apparatus comprising:
[0072]
​a receiving unit, configured to receive downlink control information sent by a network device, where the downlink control information includes a scheduling offset;
[0073]
​a processing unit, configured to receive, according to a spatial direction corresponding to the scheduling offset or a path loss reference signal corresponding to the scheduling offset, a downlink signal scheduled by the downlink control information, or send an uplink signal scheduled by the downlink control information;
[0074]
​The threshold corresponding to the scheduling offset and the scheduling offset is determined based on one of the following seed carrier spacing:
[0075]
​receiving the subcarrier spacing for the reception of the DCI;
[0076]
​receiving a subcarrier spacing for the downlink signal scheduled by the downlink control information for the reception of the PDSCH scheduled by the DCI; and
[0077]
​sending the subcarrier spacing for the uplink signal scheduled by the downlink control information for the transmission of the PUSCH scheduled by the DCI.
[0078]
​According to an eighth aspect of the embodiments of the present invention, there is provided a signal receiving or transmitting apparatus, the apparatus being configured in a network device, the apparatus comprising:
[0079]
​a sending unit, configured to send downlink control information to a terminal device, where the downlink control information includes a scheduling offset; the scheduling offset corresponds to a spatial direction indication or a corresponding path loss reference signal, and the downlink control information is used by the terminal device to receive a downlink signal scheduled by the downlink control information according to a spatial direction indication corresponding to the scheduling offset or according to a path loss reference signal corresponding to the scheduling offset, or send an uplink signal scheduled by the downlink control information;
[0080]
​The threshold corresponding to the scheduling offset and the scheduling offset is determined based on a subcarrier spacing below:
[0081]
​a subcarrier spacing for receiving the downlink control information;
[0082]
​receiving a subcarrier spacing of the downlink signal scheduled by the downlink control information; and
[0083]
​The subcarrier spacing of the uplink signal scheduled by the downlink control information is sent.
[0084]
​According to a ninth aspect of the embodiments of the present disclosure, a terminal device is provided, wherein the terminal device includes the apparatus according to the third aspect or the seventh aspect.
[0085]
​According to a tenth aspect of the embodiments of the present disclosure, a network device is provided, wherein the network device includes the apparatus according to the fourth aspect or the eighth aspect.
[0086]
​According to an eleventh aspect of the embodiments of the present invention, there is provided a communication system, the communication system comprising the terminal device according to the ninth aspect and the network device according to the tenth aspect.
[0087]
​According to other aspects of the embodiments of the present invention, a computer readable program is provided, wherein when the program is executed in a terminal device, the program causes a computer to perform the method according to the first aspect or the fifth aspect in the terminal device.
[0088]
​According to other aspects of the embodiments of the present disclosure, a storage medium storing a computer readable program is provided, wherein the computer readable program causes a computer to perform the method according to the first aspect or the fifth aspect in a terminal device.
[0089]
​According to other aspects of the embodiments of the present invention, a computer readable program is provided, wherein when the program is executed in a network device, the program causes a computer to perform the method according to the second aspect or the sixth aspect in the network device.
[0090]
​According to other aspects of the embodiments of the present invention, a storage medium storing a computer readable program is provided, wherein the computer readable program causes a computer to perform the method according to the second aspect or the sixth aspect in a network device.
[0091]
​The beneficial effects of the embodiments of the present invention are that according to at least one aspect of the embodiments of the present invention, the terminal device and the network device can transmit or receive corresponding signals using accurate power and spatial directions, thereby improving the reliability of signal reception or transmission.
[0092]
​With reference to the following description and drawings, specific embodiments of the invention are disclosed in detail, indicating the manner in which the principles of the invention may be employed. It should be understood that the embodiments of the present invention are not limited in scope. Within the spirit and the scope of the appended claims, embodiments of the invention include many changes, modifications, and equivalents.
[0093]
​Features described and/or illustrated for one embodiment may be used in the same or similar manner in one or more other embodiments, combined with features in other embodiments, or substituted for features in other embodiments.
[0094]
​It should be emphasized that the term "comprising/comprising" when used herein refers to the presence of features, integers, steps or components, but does not preclude the presence or addition of one or more other features, integers, steps or components.
​BRIEF DESCRIPTION OF THE DRAWINGS
[0095]
​Elements and features described in one or more embodiments of the invention may be combined with elements and features illustrated in one or more other figures or embodiments. In addition, in the drawings, like reference numerals designate corresponding parts in several drawings, and may be used to indicate corresponding components used in more than one embodiment.
[0096]
​The accompanying drawings are included to provide a further understanding of the embodiments of the present invention, and constitute a part of the specification, and are used to exemplify the embodiments of the present disclosure, and explain the principles of the present disclosure together with the text description.. Obviously, the drawings in the following description are merely some embodiments of the present disclosure, and those skilled in the art can obtain other drawings according to these drawings without creative efforts.. In the drawings:
[0097]
​FIG. 1 is a schematic diagram of a communication system according to an embodiment of the present invention;
[0098]
​FIG. 2 is a schematic diagram of a signal receiving or sending method according to Embodiment 1;
[0099]
​FIG. 3 is a schematic diagram of a signal receiving or sending method according to Embodiment 2;
[0100]
​FIG. 4 is a schematic diagram of a signal receiving or sending method according to Embodiment 3;
[0101]
​FIG. 5 is a schematic diagram of a signal receiving or sending method according to Embodiment 4;
[0102]
​FIG. 6 is a schematic diagram of a signal receiving or transmitting apparatus according to Embodiment 5;
[0103]
​FIG. 7 is a schematic diagram of a signal receiving or transmitting apparatus according to Embodiment 6;
[0104]
​FIG. 8 is a schematic diagram of a signal receiving or transmitting apparatus according to Embodiment 7;
[0105]
​FIG. 9 is a schematic diagram of a signal receiving or transmitting apparatus according to Embodiment 8;
[0106]
​FIG. 10 is a schematic diagram of a terminal device according to Embodiment 9;
[0107]
​FIG. 11 is a schematic diagram of a network device according to Embodiment 10.
​DETAILED DESCRIPTION OF THE EMBODIMENTS
[0108]
​The foregoing and other features of the invention will become apparent from the following description with reference to the accompanying drawings.. In the specification and drawings, specific embodiments of the present invention are specifically disclosed, which illustrate some embodiments in which the principles of the invention may be employed, and it is to be understood that the invention is not limited to the embodiments described, but on the contrary, the invention includes all modifications, variations, and equivalents falling within the scope of the appended claims.
[0109]
​In the embodiments of the present disclosure, the terms "first", "second" and the like are used to distinguish different elements from names, but do not indicate the spatial arrangement or chronological order of these elements, etc. and these elements should not be limited by these terms. The term "and/or" includes any and all combinations of one or more of the associated listed terms. The terms "comprising," " including, " "having," and the like refer to the presence of stated features, elements, elements, or components, but do not preclude the presence or addition of one or more other features, elements, elements, or components.
[0110]
​In the embodiments of the present invention, the singular forms "a", "the" and the like include plural forms and should be construed broadly to mean "a" or "a type" and not to limit the meaning of "an"; in addition, the term "the" should be understood to include both the singular and the plural as well, unless the context clearly indicates otherwise. In addition, the term "according to" should be understood as "based at least in part on. The term" based on "should be understood as" based at least in part on. " Unless the context clearly dictates otherwise.
[0111]
​In the embodiments of the present disclosure, the term "communication network" or "wireless communication network" may refer to a network conforming to any communication standard, such as Long Term Evolution (LTE), enhanced Long Term Evolution (LTE-A, LTE-Advanced), Wideband Code Division Multiple Access (WCDMA), Wideband Code Division Multiple Access (WCDMA), High Speed Packet Access (HSPA), High-Speed Packet Access (HSPA), etc.
[0112]
​In addition, the communication between devices in the communication system may be performed according to a communication protocol at any stage, for example, may include, but is not limited to, the following communication protocols: 1G (Generation), 2G, 2.5 G, 2.75 G, 3G, 4G, 4.5 G, and future 5G, New Radio (NR, New Radio, etc.), and/or other communication protocols currently known or future to be developed.
[0113]
​In the embodiment of the present invention, the term "network device" refers to a device in a communication system for accessing a terminal device to a communication network and providing a service for the terminal device. The network device may include, but is not limited to, a base station (BS), an access point (AP), a transmission reception point (TRP), a transmission reception point (AP), a broadcast transmitter, a mobility management entity (MME), a mobile management entity (RNC), a gateway, a server, a radio network controller (RNC), and a radio network controller (RNC).​For example, the Base Station Controller (BSC) and the Base Station Controller (BSC), etc.
[0114]
​The base station may include, but is not limited to, a Node B (NodeB or NB), an evolved Node B (eNodeB or eNB), and a 5G base station (GMS), and the like, and may further include a Remote Radio Head (RRH), a Remote Radio Unit (RRU), a Remote Radio Unit (RRU), a relay or a low power node (eg, a Femto, a Pico, etc.). And the term "base station" may include some or all of their functionalities, each of which may provide communication coverage for a particular geographic area. The term "cell" may refer to a base station and/or its coverage area, depending on the context in which the term is used
[0115]
​In the embodiment of the present invention, the term "user equipment" (UE) refers to a device that accesses a communication network through a network device and receives a network service, and may also be referred to as a "terminal device" (TE).. The terminal device may be fixed or mobile, and may also be referred to as a mobile station (MS), a terminal, a user, a subscriber station (SS), an access terminal (AT), a station, etc.
[0116]
​The terminal device may include, but is not limited to, a Cellular Phone, a Personal Digital Assistant (PDA), a wireless modem, a wireless communication device, a handheld device, a machine-type communication device, a laptop computer, a cordless telephone, a smartphone, a smart watch, a Digital camera, etc.
[0117]
​For another example, in a scenario such as an Internet of Things (Internet of Things), a terminal device may also be a machine or a device for monitoring or measuring, for example, may include, but is not limited to, a machine-type communication (MTC) terminal, a vehicle-mounted communication terminal, a device-to-device (D2D) terminal, a machine-to-machine (M2M) terminal, and the like.
[0118]
​The following describes the scenarios of the embodiments of the present disclosure by way of example, but the embodiments of the present disclosure are not limited thereto.
[0119]
​FIG. 1 is a schematic diagram of a communication system according to an embodiment of the present disclosure, and schematically illustrates a case in which a terminal device and a network device are used as an example, as shown in FIG. 1, the communication system 100 May include the network device 101 and the terminal device 102 for simplicity, and FIG. 1 illustrates only one terminal device as an example.. The network device 101 is, for example, a network device gNB in an NR system.
[0120]
​In the embodiments of the present disclosure, existing services or future implementations may be implemented between the network device 101 and the terminal device 102. For example, these services include, but are not limited to: Enhanced Mobile Broadband (Enhanced Mobile Broadband), Large-Scale Machine Type Communication (MWU), Massive Machine Type Communication (URLLC), and High Reliability Low Latency Communication (URLLC), etc.
[0121]
​In the embodiment of the present disclosure, the terminal device 102 May send data to the network device 101, for example, using the grant-free transmission mode. The network device 101 May receive data sent by the one or more terminal devices 102 and feed back information, such as acknowledgement (ACK) information or non-acknowledgement (NACK) information, to the terminal device 102, and the terminal device 102 May confirm the end transmission process according to the feedback information, or may further perform new data transmission, or may perform data retransmission.
[0122]
​In the embodiments of the present disclosure, for convenience of description, the control information is referred to using compact DCI.. Specifically, the size of a part of the domain of the compact DCI may be smaller than the basic control information in the NR system (for example, DCI format 0_0, 0_1, 1_0, 1_1). In addition, the size of a portion of the domain of the compact DCI is configurable.
[0123]
​In the embodiments of the present disclosure, if not specifically stated, the uplink signal includes: an uplink data signal (such as a PUSCH), a sounding reference signal (such as an SRS), a random access signal (such as a PRACH), etc. The downlink signal comprises: a downlink data signal (such as a PDSCH), a downlink control signal (such as a PDCCH), a reference signal (such as a channel state information reference signal (CSI-RS), a synchronization signal block (SSB)), etc.
[0124]
​In the embodiment of the present invention, the scheduling offset refers to the time interval/offset between the control information and the signal scheduled by the control information.
[0125]
​For example, for a PDCCH and an uplink data signal (PUSCH) scheduled by the PDCCH, the scheduling offset refers to a time domain interval/offset between the PDCCH and the PUSCH scheduled by the PDCCH. This time domain interval/offset may be a slot, a symbol level, but is not limited thereto
[0126]
​For another example, for a PDCCH and a downlink data signal (PDSCH) scheduled by the PDCCH, the scheduling offset refers to a time domain interval/offset between the PDCCH and the PDSCH scheduled by the PDCCH.. This time domain interval/offset may be a slot, a symbol level, but is not limited thereto
[0127]
​For another example, for a PDCCH and an aperiodic channel state information reference signal (CSI-RS) activated by the PDCCH, the scheduling offset refers to a time domain interval/offset between the PDCCH and the CSI-RS activated by the PDCCH.. This time domain interval/offset may be a slot, a symbol level, but is not limited thereto
[0128]
​In addition, due to different sizes of scheduling offsets, different terminal device behaviors may be corresponding. Therefore, there is a need for a threshold corresponding to the scheduling offset to distinguish the behavior of the terminal device.. The size of the threshold may be determined according to the terminal capability reported by the terminal device to the network device.
[0129]
​For example, for the downlink signal, the threshold may be the shortest time when the terminal device receives the downlink control data (PDCCH) from receiving the downlink control data (PDCCH) to the downlink signal (eg, PDSCH) scheduled by the PDCCH. The time may be an absolute time, eg, 2 ms, or may be in units of symbols or slots, and may be related to subcarrier spacing. For example, the terminal device may indicate that each subcarrier spacing is one value of a minimum OFDM symbol number of 60 kHz and 120 kHz as the threshold above, for 60 kHz, the threshold may be 7, 14, or 28 symbols, which may be 14 or 28 symbols for 120 kHz.
[0130]
​For example, for the uplink signal, the threshold may be the shortest time when the terminal device receives the downlink control data (PDCCH) from receiving the downlink control data (PDCCH) to the uplink signal (eg, PUSCH) scheduled by the PDCCH. The time may be an absolute time, eg, 2 ms, or may be in units of symbols or slots, and may be related to subcarrier spacing. For example, the terminal device may indicate that each subcarrier spacing is one value of a minimum OFDM symbol number of 60 kHz and 120 kHz as the threshold above, for 60 kHz, the threshold may be 7, 14, or 28 symbols, which may be 14 or 28 symbols for 120 kHz.
[0131]
​In the embodiment of the present invention, the threshold is also referred to hereinafter as a preset threshold.
[0132]
​Various embodiments of the present disclosure will be described below with reference to the accompanying drawings.. These embodiments are exemplary only, and are not intended to limit the present invention.
[0133]
​Embodiment 1
[0134]
​The present embodiment provides a signal receiving or sending method, which is applied to a terminal device.. FIG. 2 is a schematic diagram of a signal receiving or sending method according to an embodiment, and referring to FIG. 2, the method includes:
[0135]
​Step 201: A terminal device receives downlink control information sent by a network device, where a field of the downlink control information satisfies at least one of the following conditions (briefly referred to as a first condition): if the downlink control information is used to schedule a downlink signal, a frequency domain resource assignment field of the downlink control information is less than a domain of a frequency domain resource allocation of DCI Format 1_0. If the downlink control information is used to schedule an uplink signal, the frequency domain resource allocation field of the downlink control information is less than the domain of the frequency domain resource allocation of the DCI format 0_0.​; the domain of the time domain resource assignment is less than 4 bits; the domain of the modulation and coding scheme is less than 5 bits; the domain of the HARQ process number is less than 4 bits; the domain of the redundancy version is less than 2 bits; and the domain of the PUCCH resource indicator is less than 3 bits.​; the field of the PDSCH-to-HARQ feedback timing indicator (PDSCH-to-HARQ_feedback timing indicator) is less than 3 bits; and the domain of the downlink assignment index is less than 2 bits;
[0136]
​Step 202: The terminal device receives or transmits a signal scheduled by the downlink control information according to a spatial direction indication of the downlink control information.
[0137]
​In this embodiment, the downlink control information is the aforementioned Compact DCI, and the Compact DCI may be a new DCI format, for example, DCI Format 0_2 or DCI Format 1_2, DCI Format 0_2 is used to schedule uplink data (PUSCH), and DCI Format 1_2 is used to schedule downlink data (PDSCH).​As described above, the size of a portion of the domain of the compact DCI may be less than the basic control information in the NR system, and the terminal device may receive or transmit the signal scheduled by the downlink control information according to the spatial direction of the downlink control information, so that the terminal device and the network device can receive or transmit the corresponding signal in an accurate spatial direction, thereby improving the reliability of signal reception or transmission.
[0138]
​In this embodiment, the frequency domain resource allocation field is used to indicate the frequency domain position where the signal scheduled by the downlink control information is located; time domain resource allocated by the time domain resource is used to indicate a time domain position where the data scheduled by the downlink control information is located. The domain of the HARQ process number is used to indicate the HARQ process corresponding to the signal scheduled by the downlink control information; the domain of the redundancy version is used to indicate a redundancy version corresponding to the signal scheduled by the downlink control information; and the domain of the PUCCH resource indicator is used to indicate the PUCCH resource associated with the HARQ feedback corresponding to the signal scheduled by the downlink control information.​The field of the PDSCH-to-HARQ feedback timing indicator is used to indicate a time domain interval between the signal scheduled by the downlink control information and the HARQ feedback corresponding to the signal; and a domain indication of the downlink assignment index (a serving cell, a PDCCH monitoring occasion) pair has a cumulative number, where the (serving cell, the PDCCH monitoring occasion) is used for PDSCH reception or SPS PDSCH release associated with DCI for PDSCH scheduling. The specific meaning of each domain May refer to the prior art, and the description is omitted here.
[0139]
​In this embodiment, as shown in FIG. 2, the method may further include:
[0140]
​Step 203: The terminal device sends the uplink signal scheduled by the downlink control information according to a path loss reference signal indication (path loss reference signal indication) of the downlink control information.
[0141]
​In this embodiment, the terminal device sends the uplink signal scheduled by the downlink control information according to the path loss reference signal of the downlink control information, and the terminal device can transmit the corresponding signal using the accurate power, thereby improving the reliability of signal transmission.
[0142]
​In this embodiment, the order of execution of the step 202 and the step 203 is not limited, and according to the scheduling condition of the uplink signal and/or the downlink signal, step 202 May be performed first, step 203 May be performed first, step 203 May be performed first, step 202 May be performed, or step 202 and step 203 May be performed synchronously.
[0143]
​In this embodiment, in one embodiment of step 202, the signal scheduled by the downlink control information is a downlink signal, a PDSCH, a CSI-RS, an SSB and the like as described above, and the spatial direction indication is a QCL assumption on the downlink signal, or an indication of a TCI state of the downlink signal.
[0144]
​In this embodiment, if the downlink control information does not include the TCI domain, and the scheduling offset corresponding to the downlink control information is greater than or equal to a preset threshold, the terminal device may receive the downlink signal according to one of the following QCL assumptions or TCI states:
[0145]
​receive a TCI state or QCL assumption corresponding to a control resource set (CORESET) of the downlink control information;
[0146]
​a TCI state or QCL assumption corresponding to a default control resource set (CORESET); and
[0147]
​a default TCI state for downlink signal indication.
[0148]
​In this embodiment, the default CORESET is, for example, CORESET # 0, or in a cell where the downlink control information is located, the CORESET with the smallest ID in the BWP is activated, which is not limited in this embodiment.
[0149]
​In this embodiment, the default TCI state for the downlink signal indication may be configured, for example, by the high-layer signaling configuration and/or one or more entries activated by the MAC signaling to indicate the first one of the entries of the TCI state of the downlink signal.. For example, the higher layer signaling refers to an RRC signaling TCI-Ttaateskodak Odak Odak IDST, the RRC signaling is a plurality of TCI states configured for a downlink signal (eg, PDSCH), and the default TCI state may be a first.​In addition, the MAC-CE signaling may activate a TCI state indicated by a portion of the TCI-StateStAddModList, and the default TCI state may be the first one of the TCI states activated by the MAC-CE signaling.. The above is merely an example, and the present embodiment is not limited thereto.
[0150]
​In this embodiment, if the downlink control information includes the TCI domain, and the scheduling offset corresponding to the downlink control information is greater than or equal to the preset threshold, the terminal device may receive the downlink signal according to the TCI state indicated by the TCI domain.
[0151]
​For example, the code point of the TCI domain is mapped to the first 2N TCI states in the TCI state activated by the MAC CE signaling one by one, where N is the number of bits of the TCI domain, N > 0, for example, assuming that the size of the TCI domain is 2 bits, then the TCI field has four code points, ie, ‘ 00', ‘ 01', ‘ 10', ‘ 11 '. If the 8 TCI states activated by the MAC-CE are TCI # 0, TCI # 1, TCI # 1, TCI # 1, TCI # 1. For example, the mapping relationship between the TCI domain and the eight TCI states is: ‘ 00'→ TCI # 0, ‘ 01'→ TCI # 1, ‘ 10'→ TCI # 2, ‘ 11'→ TCI # 3​When the TCI field in the DCI is ‘ 00', the terminal device receives the downlink signal according to the TCI # 0. Therefore, the terminal device may determine the TCI state indicated by the TCI domain according to the mapping relationship, and then receive the downlink signal according to the TCI state.
[0152]
​For another example, the mapping relationship between the TCI state of the TCI domain and the TCI state activated by the MAC CE signaling is determined according to the RRC signaling.. For example, assuming that the size of the TCI domain is 2 bits, then the TCI field has four code points, ie, ‘ 00', ‘ 01', ‘ 10', ‘ 11 '. Assuming that the eight TCI states activated by the MAC-CE are TCI # 0, TCI # 1, TCI # 1, TCI # 1. If the TCI field in the DCI is ‘ 00', the terminal device receives the downlink signal according to the TCI # 3 if the TCI domain in the DCI is ‘ 00'.​In addition, the indication information corresponding to the code points ‘ 00', ‘ 01', ‘ 10', ‘ 11'in the RRC signaling may be 0,1,2, 3 respectively; TCI state TCI # 0, TCI # 1. The indication information corresponding to the TCI state # 7 is 0, 1. Step 7: The terminal device may determine the mapping relationship according to the RRC signaling, determine the TCI state indicated by the TCI domain according to the mapping relationship, and then receive the downlink signal according to the TCI state.
[0153]
​In this embodiment, if the scheduling offset corresponding to the downlink control information is less than the preset threshold, whether the downlink control information includes the TCI domain or not, and the terminal device may receive the downlink signal according to a default TCI state or QCL assumption.
[0154]
​For example, the default TCI state or QCL assumption is the same as the TCI state or QCL assumption of the CORESET with the smallest ID in the latest slot, the CORESET is associated with one monitored search space in the recent slot, and the CORESET is located on the active BWP of the current serving cell.
[0155]
​In this embodiment, the scheduling offset and the preset threshold may be determined based on one of the following seed carrier intervals:
[0156]
​receiving the subcarrier spacing for the reception of the DCI;
[0157]
​receiving the subcarrier spacing for the downlink signal scheduled by the downlink control information (the subcarrier spacing for the reception of PDSCH scheduled by the DCI).
[0158]
​In this embodiment, since the scheduling offset and the subcarrier spacing based on the preset threshold are specified, the problem of behavior blurring of the terminal device when performing the corresponding operation is avoided.
[0159]
​In this embodiment, in another embodiment of step 202, the signal scheduled by the downlink control information is an uplink signal, such as a PUSCH, an SRS, a PRACH, etc. and the spatial direction indication is an indication of spatial relation of the uplink signal.
[0160]
​In this embodiment, if the downlink control information does not include an SRI field, the terminal device may send the uplink signal according to one of the following spatial relationships or spatial domain filters:
[0161]
​A default Physical Uplink Control Channel (PUCCH) resource spatial relationship;
[0162]
​a spatial relationship corresponding to a default sounding reference signal (SRS) resource; and
[0163]
​SPATIAL DOMAIN FILTER FOR RECEIVING DOWNLINK CONTROL INFORMATION
[0164]
​In this embodiment, the default PUCCH resource may be a PUCCH resource with a minimum ID in the cell for transmitting the uplink signal, and the present embodiment is not limited thereto.
[0165]
​In this embodiment, the default SRS resource is, for example, an SRS resource with a minimum ID in the SRS resource set, which is not limited in this embodiment.. Here, the SRS resource set may be an SRS resource set associated with the uplink signal transmission, for example, an SRS resource set for corresponding PUSCH transmission.
[0166]
​In this embodiment, if the downlink control information includes the SRI domain, the terminal device may transmit the uplink signal according to the spatial relationship associated with the SRS resource indicated by the SRI field.
[0167]
​For example, the code point of the SRI field and the first 2N SRS resources in the SRS resource set associated with the transmission of the uplink signal are mapped on an one-to-one basis, where N is the number of bits of the SRI field, and N > 0. Therefore, the terminal device may determine the SRS resource indicated by the SRI domain according to the mapping relationship, and then send the uplink signal according to the spatial relationship associated with the SRS resource.
[0168]
​For another example, the mapping relationship between the code point of the SRI field and the SRS resource in the SRS resource set associated with the transmission of the uplink signal is determined according to the RRC signaling.. Therefore, the terminal device may determine the mapping relationship according to the RRC signaling, and determine the SRS resource indicated by the SRI domain according to the mapping relationship, and then send the uplink signal according to the spatial relationship associated with the SRS resource.
[0169]
​In this embodiment, in another embodiment of step 202, the signal scheduled by the downlink control information is an uplink signal, such as a PUSCH, an SRS, a PRACH, etc. and the spatial direction indication is an indication of spatial relation of the uplink signal.
[0170]
​In this embodiment, if the downlink control information does not include an SRI field, and the scheduling offset corresponding to the downlink control information is greater than or equal to a preset threshold, the terminal device may send the uplink signal according to one of the following spatial relationships or spatial domain filters:
[0171]
​A default Physical Uplink Control Channel (PUCCH) resource spatial relationship;
[0172]
​a spatial relationship corresponding to a default sounding reference signal (SRS) resource; and
[0173]
​SPATIAL FILTER FOR RECEIVING DOWNLINK CONTROL INFORMATION
[0174]
​In this embodiment, the default PUCCH resource may be a PUCCH resource with a minimum ID in an activated UL BWP for transmitting the uplink signal, and the present embodiment is not limited thereto.
[0175]
​In this embodiment, the default SRS resource is, for example, an SRS resource with a minimum ID in the SRS resource set, which is not limited in this embodiment.. Here, the SRS resource set may be an SRS resource set associated with the uplink signal transmission, for example, an SRS resource set for corresponding PUSCH transmission.
[0176]
​In this embodiment, if the downlink control information includes the SRI field, and the scheduling offset corresponding to the downlink control information is greater than or equal to a preset threshold, the terminal device may send the uplink signal according to the spatial relationship corresponding to the SRS resource indicated by the SRI field.
[0177]
​For example, the code point of the SRI field and the first 2N SRS resources in the SRS resource set associated with the transmission of the uplink signal are mapped one by one, where N is the number of bits of the SRI domain, N > 0, for example, assuming that the size of the SRI field is 2 bits, there are four code points in the SRI field, that is, ‘ 00', ‘ 01', ‘ 10', ‘ 11 '. If there are 8 SRS resources in the SRS resource set, SRS # 0, SRS # 1. For example, the mapping relationship between the SRI field and the eight SRS resources is: ‘ 00'→ SRS # 0, ‘ 01'→ SRS # 1, ‘ 10'→ SRS # 2, ‘ 11'→ SRS # 3​When the SRI field in the DCI is ‘ 00', the terminal device sends an uplink signal according to the SRS # 0. Therefore, the terminal device may determine the SRS resource indicated by the SRI domain according to the mapping relationship, and then send the uplink signal according to the spatial relationship associated with the SRS resource.
[0178]
​For another example, the mapping relationship between the code point of the SRI field and the SRS resource in the SRS resource set associated with the transmission of the uplink signal is determined according to the RRC signaling.. For example, assuming that the size of the SRI field is 2 bits, then the SRI field has four code points, ie, ‘ 00', ‘ 01', ‘ 10', ‘ 11 '. It is assumed that there are 8 SRS resources in the SRS resource set, SRS # 0, SRS # 1, SRS # 1, SRS # 1. (SRS) # 7​If the RRC signaling is configured with ‘ 00'→ SRS # 3, ‘ 01'→ SRS # 5, ‘ 10'→ SRS # 7, ‘ 11'→ SRS # 1, the terminal device sends an uplink signal according to the SRS # 3 when the SRI field in the DCI is ‘ 00 '. In addition, the indication information corresponding to the code points ‘ 00', ‘ 01', ‘ 10', ‘ 11'in the RRC signaling may be 0,1,2, 3 respectively; SRS resource SRS # 0, SRS # 1, SRS # 1. The indication information corresponding to the SRS resource # 7 is 0, 1. 7​Therefore, the terminal device may determine the mapping relationship according to the RRC signaling, and determine the SRS resource indicated by the SRI domain according to the mapping relationship, and then send the uplink signal according to the spatial relationship associated with the SRS resource.
[0179]
​In this embodiment, if the scheduling offset corresponding to the downlink control information is less than the preset threshold, whether the downlink control information includes the SRI field or not, and the terminal device may send the uplink signal according to the spatial relationship or the spatial domain filter corresponding to the nearest uplink transmission.. The uplink transmission may be at least one of the following uplink signals: PUSCH, PUCCH, SRS, PRACH, and this embodiment is not limited thereto, for example, the uplink transmission may include only PUSCH and/or PUCCH.
[0180]
​In this embodiment, the scheduling offset and the preset threshold may be determined based on one of the following seed carrier intervals:
[0181]
​receiving the subcarrier spacing for the reception of the DCI;
[0182]
​receiving the subcarrier spacing for the uplink signal scheduled by the downlink control information (the subcarrier spacing for the reception of PUSCH scheduled by the DCI).
[0183]
​In this embodiment, since the scheduling offset and the subcarrier spacing based on the preset threshold are specified, the problem of behavior blurring of the terminal device when performing the corresponding operation is avoided.
[0184]
​In this embodiment, in one embodiment of step 203, if the downlink control information does not include the SRI field, or if the downlink control information includes the SRI field but does not configure the mapping relationship between the SRI and the corresponding path loss reference signal,
[0185]
​If the spatial relationship is applicable, the path loss reference signal may be one of a spatial relationship reference signal corresponding to a default physical uplink control channel (PUCCH) resource, a spatial relationship reference signal corresponding to a default sounding reference signal (SRS) resource, and a reference signal related to a TCI state or QCL assumption corresponding to the downlink control information.. Therefore, the terminal device may send the uplink signal scheduled by the downlink control information according to the reference signal.
[0186]
​If the spatial relationship is not applicable, the path loss reference signal may be a default path loss reference signal. Therefore, the terminal device may send the uplink signal scheduled by the downlink control information according to the default reference signal.
[0187]
​In this embodiment, the default PUCCH resource is, for example, the PUCCH resource with the minimum ID on the UL BWP activated in the cell corresponding to the uplink signal (sending the cell of the uplink signal), which is not limited in this embodiment.
[0188]
​In this embodiment, the default SRS resource is, for example, an SRS resource with a minimum ID in the SRS resource set, which is not limited in this embodiment.. Here, the SRS resource set may be an SRS resource set associated with the uplink signal transmission, for example, an SRS resource set for corresponding PUSCH transmission.
[0189]
​In this embodiment, the default path loss reference signal is, for example, an ID = 0 reference signal, and this embodiment is not limited thereto.
[0190]
​In this embodiment, if the downlink control information includes the SRI field, and the mapping relationship between the SRI and the corresponding path loss reference signal is configured, the terminal device may send the uplink signal according to the path loss reference signal indicated by the SRI field.
[0191]
​For example, the mapping relationship between the code point of the SRI domain and the path loss reference signal is determined according to the RRC signaling.. For example, assuming that the size of the SRI field is 2 bits, then the SRI field has four code points, ie, ‘ 00', ‘ 01', ‘ 10', ‘ 11 '. It is assumed that there are eight path loss reference signals, which are PL-RS # 0, PL-RS # 1. If the SRI field in the DCI is ‘ 00', the terminal device sends an uplink signal according to the PL-RS # 3 when the SRI field in the DCI is ‘ 00'.​In addition, the indication information corresponding to the code points ‘ 00', ‘ 01', ‘ 10', ‘ 11'in the RRC signaling may be 0,1,2, and 3, respectively; in the RRC signaling, the path loss reference signal PL-RS # 0, PL-RS # 1. The indication information corresponding to the PL-RS # 7 is 0, 1. Step 7: The terminal device may determine the mapping relationship according to the RRC signaling, and determine a path loss reference signal indicated by the SRI field according to the mapping relationship between the indication content of the SRI field and the SRI and the corresponding path loss reference signal, and then send the uplink signal according to the path loss reference signal.
[0192]
​In this embodiment, in another embodiment of step 203, if the downlink control information does not include the SRI field, or if the downlink control information includes the SRI field but does not configure the mapping relationship between the SRI and the corresponding path loss reference signal,
[0193]
​If the spatial relationship is applicable, and the scheduling offset is greater than or equal to a preset threshold, the path loss reference signal may be one of the following: a default physical uplink control channel (PUCCH) resource, a spatial relationship reference signal, a default sounding reference signal (SRS) resource, a spatial relationship reference signal, and a reference signal related to the TCI state or QCL assumption corresponding to the downlink control information.. Therefore, the terminal device may send the uplink signal scheduled by the downlink control information according to the reference signal.
[0194]
​On the other hand, if the spatial relationship is applicable, however, the scheduling offset is less than a preset threshold, the path loss reference signal may be a reference signal related to a spatial relationship or spatial domain filter of the nearest uplink transmission. Therefore, the terminal device may send the uplink signal scheduled by the downlink control information according to the reference signal.
[0195]
​If the spatial relationship is not applicable, the path loss reference signal may be a default path loss reference signal. Therefore, the terminal device may send the uplink signal scheduled by the downlink control information according to the default path loss reference signal.
[0196]
​In this embodiment, the default PUCCH resource is, for example, the PUCCH resource with the minimum ID on the UL BWP activated in the cell corresponding to the uplink signal (sending the cell of the uplink signal), which is not limited in this embodiment.
[0197]
​In this embodiment, the default SRS resource is, for example, an SRS resource with a minimum ID in the SRS resource set, which is not limited in this embodiment.. Here, the SRS resource set may be an SRS resource set associated with the uplink signal transmission, for example, an SRS resource set for corresponding PUSCH transmission.
[0198]
​In this embodiment, the uplink transmission may be at least one of the following uplink signals: PUSCH, PUCCH, SRS, PRACH, and this embodiment is not limited thereto, for example, the uplink transmission may include only PUSCH and/or PUCCH.
[0199]
​In this embodiment, the default path loss reference signal is, for example, an ID = 0 reference signal, and this embodiment is not limited thereto.
[0200]
​In this embodiment, if the downlink control information includes the SRI field, and the mapping relationship between the SRI and the corresponding path loss reference signal is configured, the terminal device may send the uplink signal according to the path loss reference signal indicated by the SRI field.
[0201]
​For example, the mapping relationship between the code point of the SRI domain and the path loss reference signal is determined according to the RRC signaling.. For example, assuming that the size of the SRI field is 2 bits, then the SRI field has four code points, ie, ‘ 00', ‘ 01', ‘ 10', ‘ 11 '. It is assumed that there are eight path loss reference signals, which are PL-RS # 0, PL-RS # 1. If the SRI field in the DCI is ‘ 00', the terminal device sends an uplink signal according to the PL-RS # 3 when the SRI field in the DCI is ‘ 00'.​In addition, the indication information corresponding to the code points ‘ 00', ‘ 01', ‘ 10', ‘ 11'in the RRC signaling may be 0,1,2, and 3, respectively; in the RRC signaling, the path loss reference signal PL-RS # 0, PL-RS # 1. The indication information corresponding to the PL-RS # 7 is 0, 1. Step 7: The terminal device may determine the mapping relationship according to the RRC signaling, and determine a path loss reference signal indicated by the SRI field according to the mapping relationship between the indication content of the SRI field and the SRI and the corresponding path loss reference signal, and then send the uplink signal according to the path loss reference signal.
[0202]
​In this embodiment, the scheduling offset and the preset threshold may be determined based on one of the following seed carrier intervals:
[0203]
​receiving the subcarrier spacing for the reception of the DCI;
[0204]
​receiving the subcarrier spacing for the uplink signal scheduled by the downlink control information (the subcarrier spacing for the reception of PUSCH scheduled by the DCI).
[0205]
​In this embodiment, since the scheduling offset and the subcarrier spacing based on the preset threshold are specified, the problem of behavior blurring of the terminal device when performing the corresponding operation is avoided.
[0206]
​In this embodiment, the foregoing spatial relationship is applicable to configuring a spatial relationship or configuring a TCI state associated with a QCL Type-D.. For example, the default physical uplink control channel (PUCCH) resource configures a reference signal for representing a spatial relationship (UE is provided spatial setting by PUCCH-Spatialrelationinfo for the default PUCCH resource); for example,​The default sounding reference signal (SRS) resource configures a reference signal for representing a spatial relationship (UE is provided a spatial setting by SRS-Spatialrelationinfo for the default PUCCH resource).. In this embodiment, the spatial relationship may also refer to that the TCI state or QCL assumption corresponding to the downlink control information is related to the QCL Type-D, that is, the TCI state associated with the downlink control signal is configured with the reference signal of the QCL Type-D, and then it is considered that the spatial relationship is applicable.​In other words, when the PUCCH is used as an example, only when the PUCCH is configured with a reference signal for representing a spatial relationship, the PUCCH can only be selected as a path loss reference signal. The above is only illustrated by taking the PUCCH as an example, and for other signals, the situation is similar.
[0207]
​In this embodiment, the foregoing spatial relationship is not applicable to indicate that the path loss reference signal is not configured with a spatial relationship or a TCI state associated with the QCL Type.
[0208]
​In this embodiment, as described above, the size of a part of the domain of the downlink control information (Compact DCI) is configurable, for example, the number of bits corresponding to at least one domain of the downlink control information is configurable:
[0209]
​an antenna port (S);
[0210]
​Transmission Configuration Indication;
[0211]
​Rate matching indicator;
[0212]
​an SRS request (SRS request);
[0213]
​PRB bundling size indicator (PRB bundling size indicator);
[0214]
​a carrier indicator;
[0215]
​a CSI request (CSI request);
[0216]
​ZP CSI-RS triggered (ZP CSI-RS);
[0217]
​a beta offset indicator;
[0218]
​SRS resource indicator;
[0219]
​Repetition Factor; and
[0220]
​priority indication.
[0221]
​The antenna port is configured to indicate an antenna port associated with the signal scheduled by the downlink control information, and the number of bits may be configurable, for example, may be configured in a range of 0-2 bits or less; the transmission configuration indication is used to indicate a QCL assumption managed by the downlink signal scheduled by the downlink control information, and the number of bits may be configurable, for example, may be configured in a range of 0-3 or less. The rate matching indicator is used to indicate which time-frequency resources are avoided by the signal scheduled by the downlink control information, and the number of bits may be configurable, for example, may be configured in a range of 0-2 bits or less; and the SRS request is used for triggering transmission of aperiodic SRS resources, and the number of bits may be configurable.​For example, it may be configured in a range of 0-3 bits or less; the PRB bundling size indicator is used to indicate the precoding granularity of the signal scheduled by the downlink control information, and the number of bits may be configurable, for example, may be configured in a range of 0-1 bits or less. The carrier indicator is used to indicate a cell where the signal scheduled by the downlink control information is located, and the number of bits may be configurable, for example, may be configured in a range of 0-3 bits or less. The CSI request is used to trigger transmission of the aperiodic CSI report, and the number of bits may be configurable, for example, may be configured in a range of 0-3 bits or less; and the ZP CSI-RS trigger is used to trigger a zero power CSI-RS, and the number of bits thereof May be configurable.​For example, it may be configured in a range of 0-2 bits or less; the beta offset indicator is used to indicate the size or proportion of the time-frequency resources occupied by the uplink multiplexing information, that is, the multiplexed information (UCI), and the number of bits may be configurable, for example, may be configured in a range of 0-2 bits or less. The SRS resource indicator is configured to indicate an SRS resource associated with the signal scheduled by the downlink control information, and the number of bits may be configured in a range of 0-4 bits or less; and the repetition factor is used to indicate the number of repetitions of the signal scheduled by the downlink control information, and the number of bits may be configurable, for example, may be configured in a range of 0-2 bits or less.​The priority indication is used to indicate the priority of the signal scheduled by the downlink control information, and the number of bits may be configurable, for example, may be configured in a range of 0-3 bits or less. The specific meaning of each domain May refer to the prior art, and the description is omitted here.
[0222]
​According to the embodiments of the present invention, the terminal device and the network device can transmit or receive corresponding signals using accurate power and spatial directions, thereby improving the reliability of signal reception or transmission.
[0223]
​Embodiment 2
[0224]
​This embodiment provides a signal receiving or sending method, which is applied to a network device, which is a process corresponding to the network side of the method of Embodiment 1, and the same content as Embodiment 1 is not repeated.
[0225]
​FIG. 3 is a schematic diagram of a signal receiving or sending method according to an embodiment, and as shown in FIG. 3, the method includes:
[0226]
​Step 301: The network device sends downlink control information to the terminal device, the field of the downlink control information satisfying at least one of the first condition, and regarding the first condition, it has been described in detail in Embodiment 1, and the content thereof is incorporated herein, and details are not described herein again.
[0227]
​In one embodiment, the downlink control information has a spatial direction indication, and the terminal device may instruct to receive or transmit the signal scheduled by the downlink control information according to the spatial direction.
[0228]
​For example, the signal scheduled by the downlink control information is a downlink signal, and the spatial direction is indicated as an indication of a QCL assumption or a TCI state of the downlink signal.
[0229]
​For another example, the signal scheduled by the downlink control information is an uplink signal, and the spatial direction indicates an indication of a spatial relationship of the uplink signal.
[0230]
​In another embodiment, the downlink control information has a path loss reference signal indication, and the terminal device may instruct to send the uplink signal scheduled by the downlink control information according to the path loss reference signal.
[0231]
​In this embodiment, the number of bits corresponding to at least one domain of the downlink control information is configurable, specifically as described in Embodiment 1, and the description is omitted here.
[0232]
​According to the embodiments of the present invention, the terminal device and the network device can transmit or receive corresponding signals using accurate power and spatial directions, thereby improving the reliability of signal reception or transmission.

​Claims

​[Claim 1]
​A signal receiving or transmitting apparatus, the apparatus being configured in a terminal device, wherein the apparatus comprises: a receiving unit, configured to receive downlink control information sent by a network device, where a field of the downlink control information satisfies at least one of the following conditions: if the downlink control information is used to schedule a downlink signal, a domain of the frequency domain resource allocation of the downlink control information is less than a domain of frequency domain resource allocation of DCI Format 1_0. If the downlink control information is used to schedule an uplink signal, the frequency domain resource allocation field of the downlink control information is less than the domain of the frequency domain resource allocation of the DCI format 0_0; the domain of the time domain resource allocation is less than 4 bits; and the domain of the modulation and coding scheme is less than 5 bits.​the domain of the HARQ process number is less than 4 bits; the domain of the redundancy version is less than 2 bits; the domain of the PUCCH resource indicator is less than 3 bits; the field of the PDSCH-to-HARQ feedback timing indicator is less than 3 bits; and the domain of the downlink assignment index is less than 2 bits; and the processing unit is configured to receive or transmit the signal scheduled by the downlink control information according to the spatial direction indication of the downlink control information.
​[Claim 2]
​The apparatus according to claim 1, wherein the processing unit is further configured to send an uplink signal scheduled by the downlink control information according to a path loss reference signal indication (path loss reference signal indication) of the downlink control information.
​[Claim 3]
​The apparatus according to claim 1, wherein the signal scheduled by the downlink control information is a downlink signal, and the spatial direction is indicated as an Indication of a QCL assumption or a Transmission Configuration Indication (TCI) state of the downlink signal.
​[Claim 4]
​The apparatus according to claim 3, wherein the downlink control information does not include a TCI domain, and a scheduling offset corresponding to the downlink control information is greater than or equal to a preset threshold. Receiving, by the processing unit, the downlink signal according to one of the following QCL assumptions or TCI states: receiving a TCI state or QCL assumption corresponding to a control resource set (CORESET) corresponding to the downlink control information; a TCI state or QCL assumption corresponding to a default control resource set (CORESET); and a default TCI state for downlink signal indication.
​[Claim 5]
​The apparatus according to claim 3, wherein the downlink control information comprises a TCI domain, and a scheduling offset corresponding to the downlink control information is greater than or equal to a preset threshold; and the processing unit receives the downlink signal according to a TCI state indicated by the TCI domain.
​[Claim 6]
​The apparatus according to claim 3, wherein a scheduling offset corresponding to the downlink control information is less than a preset threshold; and the processing unit receives the downlink signal according to a default TCI state or QCL assumption.
​[Claim 7]
​The apparatus according to claim 3, wherein the scheduling offset corresponding to the downlink control information and a preset threshold are determined based on one of: a subcarrier spacing for the reception of the DCI; and a subcarrier spacing for the downlink signal scheduled by the downlink control information (the subcarrier spacing for the reception of PDSCH scheduled by the DCI).
​[Claim 8]
​The apparatus according to claim 5, wherein a mapping relationship between a code point of the TCI domain and a first 2N TCI states in a TCI state activated by a MAC CE signaling, wherein N is a number of bits of the TCI domain and N > 0; or, a mapping relationship between a code point of the TCI domain and a TCI state activated by a MAC CE signaling is determined according to an RRC signaling.
​[Claim 9]
​The apparatus according to claim 1, wherein the signal scheduled by the downlink control information is an uplink signal, and the spatial direction indicates an indication of a spatial relationship of the uplink signal.
​[Claim 10]
​The apparatus according to claim 9, wherein the downlink control information does not include an SRI field; and the processing unit sends the uplink signal according to one of the following spatial relationships or spatial domain filters: a spatial relationship of a default physical uplink control channel (PUCCH) resource; a spatial relationship corresponding to a default sounding reference signal (SRS) resource; and a spatial domain filter for receiving the downlink control information.
​[Claim 11]
​The apparatus according to claim 9, wherein the downlink control information comprises an SRI field; and the processing unit sends the uplink signal according to a spatial relationship associated with the SRS resource indicated by the SRI field.
​[Claim 12]
​The apparatus according to claim 9, wherein the downlink control information does not include an SRI field, and a scheduling offset corresponding to the downlink control information is greater than or equal to a preset threshold. The processing unit sends the uplink signal according to one of the following spatial relationships or spatial domain filters: a spatial relationship of a default physical uplink control channel (PUCCH) resource; a spatial relationship corresponding to a default sounding reference signal (SRS) resource; and a spatial domain filter for receiving the downlink control information.
​[Claim 13]
​The apparatus according to claim 9, wherein the downlink control information comprises an SRI field, and a scheduling offset corresponding to the downlink control information is greater than or equal to a preset threshold; and the processing unit sends the uplink signal according to a spatial relationship corresponding to the SRS resource indicated by the SRI field.
​[Claim 14]
​The apparatus according to claim 9, wherein the scheduling offset corresponding to the downlink control information is less than a preset threshold; and the processing unit sends the uplink signal according to a spatial relationship or a spatial domain filter corresponding to the nearest uplink transmission.
​[Claim 15]
​The apparatus according to claim 2, wherein the downlink control information does not include an SRI field, or the downlink control information includes an SRI field but does not configure a mapping relationship between the SRI and the corresponding path loss reference signal: if the spatial relationship is applicable, the path loss reference signal is one of a spatial relationship reference signal corresponding to a default physical uplink control channel (PUCCH) resource, a spatial relationship reference signal corresponding to a default sounding reference signal (SRS) resource, and a reference signal related to a TCI state or QCL assumption corresponding to the downlink control information. If the spatial relationship is not applicable, the path loss reference signal is a default path loss reference signal.
​[Claim 16]
​The apparatus according to claim 2, wherein the downlink control information does not include an SRI field, or the downlink control information includes an SRI field but does not configure a mapping relationship between the SRI and the corresponding path loss reference signal: if the spatial relationship is applicable, and the scheduling offset is greater than or equal to a preset threshold, the path loss reference signal is one of a spatial relationship reference signal corresponding to a default physical uplink control channel (PUCCH) resource, a default sounding reference signal (SRS) resource, a spatial relationship reference signal, and a reference signal related to a TCI state or QCL assumption corresponding to the downlink control information.​If the spatial relationship is applicable, and the scheduling offset is less than a preset threshold, the path loss reference signal is a reference signal related to a spatial relationship or a spatial domain filter of the nearest uplink transmission; if the spatial relationship is not applicable, the path loss reference signal is a default path loss reference signal.
​[Claim 17]
​The apparatus according to claim 2, wherein the downlink control information comprises an SRI field, and a mapping relationship between the SRI and the corresponding path loss reference signal is configured; and the processing unit sends the uplink signal according to the path loss reference signal indicated by the SRI field.
​[Claim 18]
​The apparatus of claim 1, wherein the number of bits corresponding to at least one domain of the downlink control information is configurable: an antenna port; a transmission configuration indicator; a rate matching indicator; an SRS request; a PRB bundling size indicator; a carrier indicator; a CSI request; a ZP CSI-RS trigger; a beta offset indicator; an SRS resource indicator; a repetition factor; and a priority indication.
​[Claim 19]
​A signal receiving or transmitting apparatus, the apparatus being configured in a network device, wherein the apparatus comprises: a sending unit, configured to send downlink control information to a terminal device, the domain of the downlink control information satisfying at least one of the following conditions: if the downlink control information is used to schedule a downlink signal, a domain of the frequency domain resource allocation of the downlink control information is less than a domain of a frequency domain resource allocation of the DCI Format 1_0. If the downlink control information is used to schedule an uplink signal, the frequency domain resource allocation field of the downlink control information is less than the domain of the frequency domain resource allocation of the DCI format 0_0; the domain of the time domain resource allocation is less than 4 bits; and the domain of the modulation and coding scheme is less than 5 bits.​the domain of the HARQ process number is less than 4 bits; the domain of the redundancy version is less than 2 bits; the domain of the PUCCH resource indicator is less than 3 bits; the field of the PDSCH-to-HARQ feedback timing indicator is less than 3 bits; and the domain of the downlink assignment index is less than 2 bits; and the downlink control information has a spatial direction indication, and the terminal device instructs to receive or transmit the signal scheduled by the downlink control information according to the spatial direction of the downlink control information.
​[Claim 20]
​A signal receiving or transmitting apparatus, the apparatus being configured to a terminal device, the apparatus comprising: a receiving unit, configured to receive downlink control information sent by a network device, where the downlink control information includes a scheduling offset. A processing unit, configured to receive a downlink signal scheduled by the downlink control information according to a spatial direction corresponding to the scheduling offset or a path loss reference signal corresponding to the scheduling offset, or send an uplink signal scheduled by the downlink control information, wherein the threshold corresponding to the scheduling offset and the scheduling offset is determined based on one of the following seed carrier intervals.​receiving a subcarrier spacing for the reception of the DCI by the downlink control information; and receiving a subcarrier spacing for the downlink signal scheduled by the downlink control information for the reception of the PDSCH schedule by the DCI.​a subcarrier spacing for the uplink signal scheduled by the downlink control information (the subcarrier spacing for the transmission of the PUSCH scheduled by the DCI).