Technical field
[0001]
　The present disclosure relates to a communication device and a communication method.
Background technique
[0002]
　In recent years, the spread of the IEEE (Institute of Electrical and Electronics Engineers) 802.11 wireless LAN, which is representative (Local Area Network) is progressing. In addition, it is also increasing wireless LAN enabled products along with it.
[0003]
　Here, wireless LAN products, for example, an access point (hereinafter, also referred to as AP (Access Point).) And the station (hereinafter, also referred to as STA (Station).) Are classified into. The downlink (hereinafter, DL (Downlink) and also referred to.) Communications from AP called communication to STA, and the uplink (hereinafter, also referred to as UL (Uplink).) Communication line from STA called communication to the AP divide.
[0004]
　With the increase in wireless LAN products as described above, since the number of STA is also increasing, there is a possibility that the incidence of frames (packets) collisions in the uplink communication is enhanced.
[0005]
　In contrast, in Patent Document 1, by transmitting the frame using the channel STA which has received the predetermined frame, such as a group polling from the AP is notified in the predetermined frame, a communication multiplex a UL transmission method is disclosed. Thus, the collision of the UL transmission frame can be suppressed.
CITATION
Patent Literature
[0006]
Patent Document 1: JP-T 2015-511077 Patent Publication
Summary of the Invention
Problems that the Invention is to Solve
[0007]
　However, the communication method disclosed in Patent Document 1, UL transmission STA is controlled by the notification from the AP, a method belonging to the so-called control access method. Therefore, STA performs any UL transmission, UL communication of the so-called random access method has not been subject.
[0008]
　In the present disclosure, which can suppress a decrease in communication efficiency in the UL communication at the random access scheme, it proposes a new and improved communication apparatus and a communication method.
Means for Solving the Problems
[0009]
　According to the present disclosure, transmits a radio communication resource information selectable resource is identified from a plurality of resources as uplink resources, and the attribute information about the transmission of the second frame, the first frame containing the receiving the second frame sent in response to the first frame, a communication unit, a communication device is provided.
[0010]
　Further, according to the present disclosure, the received wireless communication resource information selectable resource is identified from a plurality of resources as uplink resources, and the attribute information about the transmission of the second frame, the first frame containing the , transmitting the second frame in response to the first frame, a communication unit, a communication device is provided.
[0011]
　Further, according to the present disclosure, transmits a radio communication resource information selectable resource is identified from a plurality of resources as uplink resources, and the attribute information about the transmission of the second frame, the first frame containing the it and comprises, receiving a second frame sent in response to the first frame, the communication method is provided.
[0012]
　Further, according to the present disclosure, receives a radio communication resource information selectable resource is identified from a plurality of resources as uplink resources, and the attribute information about the transmission of the second frame, the first frame containing the it and comprises, and transmitting the second frame in response to the first frame, the communication method is provided.
Effect of the invention
[0013]
　According to the present disclosure described above, a communication apparatus and communication method capable of suppressing the lowering of the communication efficiency in the UL communication at the random access method is provided. Incidentally, the above effect is not necessarily restrictive, with the above effects, or instead of the above effects, any effects shown herein, or other effects that may be grasped from the description, it may be achieved.
BRIEF DESCRIPTION OF THE DRAWINGS
[0014]
Is a diagram illustrating a configuration example of a communication system according to an embodiment of FIG. 1 the present disclosure.
Is a diagram illustrating an example frame exchange sequence in FIG. 2 conventional UL communication.
Is a block diagram showing an example of the AP and STA in the schematic functional configuration according to the first embodiment of FIG. 3 present disclosure.
It is a block diagram showing an example of a schematic functional configuration of a radio communication apparatus according to the first embodiment of FIG. 4 present disclosure.
It is a diagram for explaining an example of allocation and use of resources in the communication performed by the AP and STA according to [5] The present embodiment.
It is a diagram for explaining another example of the allocation and use of resources in the communication performed by the AP and STA according to [6] The present embodiment.
7 is a diagram showing a configuration example of a trigger frame according to the present embodiment.
8 is a flowchart conceptually showing a process of an AP according to the present embodiment.
9 is a flowchart conceptually showing a process of a STA according to the present embodiment.
It is a diagram for explaining an example of allocation and use of resources in the communication performed by the AP and STA according to a first modification of FIG. 10 embodiment.
11 is a diagram showing a configuration example of a trigger frame according to a first modification of the present embodiment.
It is a diagram for explaining an example of resource allocation in a communication performed by the AP and STA according to a second embodiment of FIG. 12 the present disclosure.
13 is a diagram showing a configuration example of a trigger frame according to the present embodiment.
14 is a diagram showing an example of a transmission setting conditions included in Condition Parameter field of the trigger frame transmitted in the present embodiment.
Is a diagram illustrating an example of information included in the Frequency the Map Field of the trigger frame transmitted in FIG. 15A] present embodiment.
Is a diagram illustrating an example of information included in the Timing the Map Field of the trigger frame transmitted in FIG. 15B] present embodiment.
Is a diagram illustrating an example of information contained in the Spatial the Map Field of the trigger frame transmitted in FIG. 15C] present embodiment.
16 is a diagram for explaining an example of frame sequence for the communication performed by the AP and STA according to the present embodiment.
17 is a diagram showing an example of a configuration of a response UL frame according to the present embodiment.
18 is a flowchart conceptually showing a sub-area determination process of an AP according to the present embodiment.
19 is a flowchart conceptually showing a communication process with STA of AP according to the present embodiment.
FIG. 20 is a flowchart conceptually showing a communication process with STA of AP according to the present embodiment.
21 is a block diagram showing an example of a schematic configuration of a smart phone.
22 is a block diagram showing an example of a schematic configuration of a car navigation system.
FIG. 23 is a block diagram showing an example of a schematic configuration of a wireless access point.
DESCRIPTION OF THE INVENTION
[0015]
　Reference will now be described in detail preferred embodiments of the present disclosure. In the specification and the drawings, components having substantially the same function and structure are a repeated explanation thereof by referring to the figures.
[0016]
　Further, in the present specification and drawings, a plurality of structural elements having substantially the same functional configuration may be distinguished by affixing a different number after the same reference numerals. For example, distinguished as a substantially more components having the same functions, such as STA 20 # A and STA 20 # B as needed. However, substantially when it is not necessary to distinguish the same functional configuration are denoted by the same reference numeral. For example, when it is not necessary to distinguish between the STA 20 # A and STA 20 # B is simply referred to as STA 20.
[0017]
　The description will be made in the following order.
　1. Issues Overview and prior art communication system according to an embodiment of the present disclosure
　2. First Embodiment (UL transmission control based on the resource
　　area) 2-1. Configuration of the apparatus
　　2-2. Technical features
　　2-3. Processing of the device
　　2-4. Summary of first embodiment
　　2-5. Modification
　3. Second Embodiment (the collection of information related to UL transmission using sub-area)
　　3-1. Configuration of the apparatus
　　3-2. Technical features
　　3-3. Processing of the device
　　3-4. Summary of the second embodiment
　4. Application Example
　5. Conclusion
[0018]
　<1. Description of the prior art problems of a communication system according to an embodiment of the present disclosure>
　First, with reference to FIG. 1, will be described problem summary and the prior art of a communication system according to an embodiment of the present disclosure. Figure 1 is a diagram showing a configuration example of a communication system according to an embodiment of the present disclosure.
[0019]
　Communication system, and a communication device 10 and the plurality of communication devices 20. The communication device 10 and the communication device 20 has a wireless communication function, to communicate with each other. For example, the communication device 10 operates as AP, the communication device 20 operates as a STA. Hereinafter, it refers to the communication apparatus 10 also AP 10, also referred to as a communication device 20 STA 20. Therefore, in the communication system, both DL communications and UL communications can take place.
[0020]
　For example, the communication system, as shown in FIG. 1, may be configured in AP10 and more STA20 # 1 ~ 20 # 4. AP10 and STA20 # 1 ~ 20 # 4 is connected via a wireless communication to transmit and receive directly the frame to each other. For example, AP 10 transmits a DL frame destined for each of the STA20 # 1 ~ 20 # 4. Moreover, STA 20 each of # 1 to 20 # 4, respectively transmit the UL frame destined to AP 10.
[0021]
　Here, the transmission of the UL frame may be performed in a random access method. Referring to FIG 2, a description will be given of the transmission of the conventional UL frame. Figure 2 is a diagram illustrating an example frame exchange sequence in a conventional UL communication.
[0022]
　In a random access scheme, STA starts communication UL frame at an arbitrary timing. Also, other STA starts its UL communication after of the UL communication end. For example, as shown in FIG. 2, Uplink Data (hereinafter, also referred to as a ULD.) As a UL frame from one STA are transmitted, ACK (Acknowledgment) is transmitted from the AP as a response frame to the UL frame. Other STA is added from reception of the ACK to the time of a predetermined interframe space, for example, it starts to transmit the backoff (Back off) itself transmitted after a time ULD.
[0023]
　However, the number of STA increases, collisions UL frame is likely to occur. For example, the number of STA increases, the probability that STA overlap to start first UL communication becomes high. In addition, the higher the probability that the STA is duplicated to start the UL communication after the back-off. As a result, UL frame collide, wireless communication resources such as frequency (hereinafter, simply referred to as resources.) Utilization efficiency may decrease.
[0024]
　In contrast, it is conceivable such application of the method of communication for multi-user in the DL communication at the UL communication. For example, in a conventional wireless communication system, a method for transmitting a plurality of frames by a method of performing DL communication a plurality of STA as a target from the AP, to aggregation of multiple frames into one physical layer burst or more frames, the a method performing transmission using frequency division multiplexing or space division multiplexing. The method using the multiplexing of these by applying the UL communication, it is conceivable to transmit the UL frame at the same timing from a plurality of STA to the AP.
[0025]
　Here, multiplexing UL communications using a frame (hereinafter, UL multiplexing referred communicates with.), The setting of the communication parameters of the plurality of STA performing UL communication at the same time is important. For example, it is desirable that it is desirable, and the transmission time for each of the UL frame are synchronous to each UL frame transmitted from a plurality of STA is perpendicular to a separable respectively, for frequency or space. Otherwise, it can be difficult to correctly receive the respective UL frame in AP.
[0026]
　On the other hand, communication parameters are generally different by each STA. Specifically, the type or size of data to be transmitted by the UL communication is different. For example, data size, the data or frame attributes, different thousands octets width from a few octets.
[0027]
　Also, different modulation parameters used in the UL communication. For example, in a wireless communication system in a wireless LAN standard, a plurality of modulation rate and (modulation scheme) is provided, the communication apparatus on the transmission side each time a communication, selects a modulation rate that is determined optimal, selected data is transmitted using a modulation rate. Furthermore, depending on the distance of the AP and STA, available modulation rate changes. Then, it takes time to change the data transmission in accordance with the modulation rate.
[0028]
　The frequency channel as one of the communication parameters is, it may be more available in the same timing. For example, in a wireless communication system in a wireless LAN standard such as multiplexing technique using OFDM (Orthogonal Frequency Division Multiplexing), there is a channel bonding technique. The channel bonding technique, bandwidth by bundling a plurality of frequency channels is 20 MHz, for example, the bandwidth of 40 MHz, the bandwidth of 80 MHz, it is possible to perform frame transmitted using the bandwidth of 160 MHz.
[0029]
　Further, since it is often also the distance between the AP and the STA, not uniformly distributed, the communication parameter is tends to vary among the STA. For example, other modulation rate as described above, communication parameters such as transmission signal strength may vary depending on the distance between the AP and the STA.
[0030]
　Therefore, in the random access scheme, it is difficult to take matching of the communication parameters of each of the plurality of STA, as a result, the communication efficiency of the UL multiplex communication may be reduced. Further, a method of separately collecting the communication parameter is considered, will be the communication for the acquisition of the communication parameters is newly generated, also the communication efficiency of the UL multiplex communication may be reduced.
[0031]
　On the other hand, the control access system, due to resource allocation of UL transmission, UL communication request using polling or the like from the AP for each STA (hereinafter, also referred to as ULR (Uplink Request).) Whether the query row divide. Therefore, there is a case where the STA can not be transmitted the ULR until polling is performed, if the polling is not carried out can not perform transmission of the frame according to the ULR. Although it is conceivable that accepts ULR from STA without polling, in which case, without ULR frames are multiplexed, for transmission in time order, it decreases the resource use efficiency.
[0032]
　Thus, in the conventional communication techniques, the number of STA increases, in the UL communication of the random access method, frame collision may frequently. Moreover, it can be difficult to identify the communication parameters suitable for the UL communication of the random access method. As a result, the communication efficiency in UL communication is may decrease.
[0033]
　Accordingly, the present disclosure proposes a communication device capable of suppressing reduction in communication efficiency in the UL communication at random access method. The following will explain the details. Incidentally, in FIG. 1 as an example of a communication system, the communication system has been described an example composed of AP10 and STA 20, instead of AP10, one of the STA 20 with multiple direct links with other STA 20 it may be a communication device. In that case, the DL described above "simultaneous transmissions from one STA to multiple STA", UL described above may be read as "simultaneous transmissions from a plurality of STA to one STA". For convenience of explanation, each of the AP 10, STA 20 and the communication device 100 according to the first and second embodiments, as AP10-1 and AP10-2, denoted by the number corresponding to the embodiment to the end distinguish.
[0034]
　<2. First Embodiment (UL transmission control based on the resource area)>
　has been described above overview of a communication system according to an embodiment of the present disclosure. Next, a description will be given AP10-1 and STA20-1 according to the first embodiment of the present disclosure.
[0035]
　　<2-1. Configuration of Apparatus>
　First, with reference to FIG. 3, description is made about the functional structure of AP10-1 and STA20-1 according to the first embodiment of the present disclosure. Figure 3 is a block diagram showing an example of a schematic functional configuration of AP10-1 and STA20-1 according to the first embodiment of the present disclosure.
[0036]
　AP10-1 and STA20-1 (hereinafter, also referred to as like AP10-1.), As shown in FIG. 3, the wireless communication device 100-1, a wired communication device 202, the information input unit 204, the device control unit 206 and comprising information output unit 208.
[0037]
　Wireless communication device 100-1 performs wireless communication with AP10-1 or STA20-1. More specifically, the wireless communication device 100-1 performs wireless communication for data obtained from the device control unit 206. It will be described in detail later.
[0038]
　Wired communication device 202 communicates with an external device via a wired. Specifically, the wired communication device 202 is connected to the Internet, it communicates with an external device via the Internet. For example, wired communication unit 202 transmits via the Internet a data radio communication apparatus 100-1 is acquired by communication to an external device.
[0039]
　Information input unit 204 performs reception of input. Specifically, the information input unit 204 accepts information derived from user input or sensor. For example, the information input unit 204 may be input devices such as a keyboard or a touch panel. Further, the information input unit 204 converts a signal obtained from the image sensor to the image information.
[0040]
　Device control unit 206 generally controls operations such AP10-1. Specifically, the device control unit 206 controls the communication of the wireless communication device 100-1 or wired communication device 202. For example, the device control unit 206 causes the transmit data obtained from the information input unit 204 to the wireless communication device 100-1 or wired communication device 202, the data obtained by the communication of the wireless communication device 100-1 or wired communication device 202 is output to the information output unit 208.
[0041]
　Information output section 208 outputs the data. Specifically, the information output unit 208 outputs the data indicated from the device control unit 206. For example, the information output unit 208 may be a speaker or the like for audio output based on the display or voice information to be displayed and output on the basis of the image information.
[0042]
　　　(Configuration of Radio Communication Apparatus)
　Next, with reference to FIG. 4, a description is given of a functional configuration of the wireless communication device 100-1. Figure 4 is a block diagram showing an example of a schematic functional configuration of a radio communication apparatus 100-1 according to the first embodiment of the present disclosure.
[0043]
　Wireless communication device 100-1, as shown in FIG. 4, as the communication unit, a data processing unit 110, the control unit 120 and the wireless communication unit 130.
[0044]
　　　(Data processing unit)
　data processor 110, as shown in FIG. 4, an interface unit 111, transmission buffer 112, a transmission frame constructing section 113, a reception frame analysis section 114 and a receive buffer 115.
[0045]
　Interface unit 111 is an interface to be connected to another functional configuration other than the functional configuration described above in such AP10-1. Specifically, the interface unit 111 performs provision of received data reception of transmitted data from another functional configuration or to other functional configuration.
[0046]
　Transmission buffer 112 stores the data to be transmitted. Specifically, the transmission buffer 112 stores the data obtained by the interface unit 111.
[0047]
　Transmission frame constructing unit 113 generates a frame to be transmitted. Specifically, the transmission frame constructing unit 113 generates a frame based on the control information set by the data or control unit 120 is stored in the transmission buffer 112. The control information may be information such as the resource information according to the trigger frame to be described later. For example, the transmission frame constructing unit 113 generates a frame (or packet) from the data, the media access control frames generated: such as addition of additional and error detection code of the MAC header for the (MAC Media Access Control) processing is carried out.
[0048]
　Reception frame analysis section 114 analyzes the frame received. Specifically, the reception frame analysis section 114, acquires the data or control information included in the destination determination and the frame of the frame received by the wireless communication unit 130. For example, the reception frame analysis section 114, the frame to be received, the analysis of the MAC header, detection and correction of bit error, and to obtain data or the like by performing the reordering processing.
[0049]
　Reception buffer 115 stores the received data. Specifically, the receive buffer 115 stores the data acquired by the reception frame analysis section 114.
[0050]
　　　(Controller)
　controller 120, as shown in FIG. 4 comprises an operation control unit 121 and the signal control unit 122.

The scope of the claims
[Claim 1]
　It sends a radio communication resource information selectable resource is identified as an uplink resource of a plurality of resources, and the attribute information about the transmission of the second frame, the first frame comprising,
　for the first frame receiving the second frame to be transmitted as a response, a communication unit, a communication device.
[Claim 2]
　The communication unit receives the second frame based on the radio communication resource information included in the first frame, the communication apparatus according to claim 1.
[Claim 3]
　The second frame, based on the attribute information about the transmission of the second frame is transmitted using at least one resource is selected from the selectable resource specified from the radio communication resource information, the communication apparatus according to claim 1.
[Claim 4]
　The attribute information about the transmission of the second frame includes attribute information of the transmitting device that performs transmission of the second frame, the communication apparatus according to claim 1.
[Claim 5]
　Attribute information of the transmitting device comprises information relating to the presence or absence of up-link communications demand, the communication apparatus according to claim 4.
[Claim 6]
　The uplink communication request includes a data transmission request, the communication device according to claim 5.
[Claim 7]
　The uplink communication request includes a communication connection request, a communication device according to claim 5.
[8.]
　The second frame includes information relating to the contents of the up-link communications demand, the communication apparatus according to claim 5.
[Claim 9]
　Attribute information of the transmitting device comprises information relating to a communication state of the transmission device, a communication device according to claim 4.
[Claim 10]
　Wherein the communication condition includes information relating to the quality of the communication, the communication apparatus according to claim 9.
[Claim 11]
　Wherein the communication condition includes information relating to the state of the communication channel, the communication apparatus according to claim 9.
[Claim 12]
　The second frame includes information relating to the contents of the communication state of the transmission device, a communication device according to claim 9.
[Claim 13]
　The attribute information about the transmission of the second frame includes information relating to attributes of said second frame, the communication apparatus according to claim 1.
[Claim 14]
　Wherein the attribute of the second frame, including the frame type, the communication apparatus according to claim 13.
[Claim 15]
　Receiving a radio communication resource information selectable resource is identified as an uplink resource of a plurality of resources, and the attribute information about the transmission of the second frame, the first frame comprising,
　for the first frame transmitting the second frame as a response, a communication unit, a communication device.
[Claim 16]
　The communication unit based on the attribute information about the transmission of the second frame, the at least one of said second frame using the resources are selected from the selectable resource specified from the radio communication resource information transmitting communication device according to claim 15.
[Claim 17]
　Attribute information about the transmission of the second frame includes attribute information of the transmitting device that performs transmission of the second frame,
　the communication unit, when the attribute information of the device corresponds to the attribute information of the transmission device , transmitting the second frame, the communication apparatus according to claim 16.
[Claim 18]
　The attribute information about the transmission of the second frame includes information relating to attributes of said second frame,
　the communication unit of the frame attributes frame the second corresponding to the attribute of the second frame transmitting a frame, the communication apparatus according to claim 16.
[Claim 19]
　And transmitting the radio communication resource information selectable resource is identified as an uplink resource of a plurality of resources, and the attribute information about the transmission of the second frame, the first frame including,
　the first frame , receiving a second frame sent in response to
　including, a communication method.
[Claim 20]
　And receiving a radio communication resource information selectable resource is identified as an uplink resource of a plurality of resources, and the attribute information about the transmission of the second frame, the first frame including,
　the first frame and sending the second frame in response to
　including, a communication method.