Communication control device and information processing method

Abstract

To provide a communication device and an information processing method that appropriately reduce inter-link interference.SOLUTION: In a wireless communication system, when a communication device simultaneously transmits and receives data signals between other communication devices using multiple links, the communication device acquires first interference information from the other communication devices regarding interference between links occurring in the other communication devices, and determines transmission parameters to be used by the other communication devices to transmit the data signals on the basis of the first interference information and second interference information regarding interference between links occurring in the communication device.SELECTED DRAWING: Figure 11

Description

Technical Field

[0001] The present technology particularly relates to a communication device and an information processing method that can appropriately reduce interference between Links.

Background Art

[0002] In order to cope with the recent increase in data traffic, an increase in data capacity and an improvement in maximum throughput in a wireless LAN (Local Area Network) are required.

[0003] As one of the realization methods, for example, Multi-Link Operation (hereinafter referred to as MLO) that performs communication using a plurality of frequency bands simultaneously, as disclosed in Patent Document 1, has attracted attention. It is expected that MLO will be standardized in the next-generation standard of IEEE802.11.

[0004] In an MLO terminal, which is a terminal capable of communication by MLO, it is important to appropriately perform an operation of simultaneously transmitting and receiving data on each Link. Hereinafter, the operation of an MLO terminal that simultaneously transmits and receives data using a plurality of Links as appropriate is referred to as an STR (Simultaneously Tx And Rx) operation.

[0005] For example, when a certain MLO terminal transmits data using two Links, Link A and Link B, Link A can achieve a higher PHY rate than Link B, and thus, the data transmission on Link A may end earlier than the data transmission on Link B. This is caused by differences in the MCS (Modulation and Coding Scheme) and bandwidth that can be used for each Link.

[0006] In such a case, from the perspective of the transmitting MLO terminal, it is desirable to receive the Block Ack first on Link A and then start data transmission again on Link A while continuing data transmission on Link B.

[0007] Also, due to the STR operation, full duplex communication such as, for example, when a radio base station performs UL (Up Link) communication with terminal B using Link B while performing DL (Down Link) communication with terminal A using Link A becomes possible.

[0008] In this way, the MLO terminal can achieve more efficient MLO communication by performing the STR operation.

Prior Art Documents

Patent Documents

[0009]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0010] When performing the STR operation in an MLO terminal, inter-Link interference within the device becomes a problem. For example, when a certain MLO terminal starts transmitting another signal on Link B while receiving a signal on Link A, the transmission signal of Link B may enter the receiving section of Link A as an interference signal and deteriorate the quality of the signal being received on Link A.

[0011] Although it is common to adopt a hardware configuration for reducing inter-Link interference, not all MLO terminals can sufficiently remove inter-Link interference by the hardware configuration. The degree of influence of inter-Link interference will greatly depend on the implementation of the MLO terminal.

[0012] This technology has been made in view of such a situation and enables appropriate reduction of inter-Link interference.

Means for Solving the Problems

[0013] The communication device according to the first aspect of the present technology acquires first interference information regarding interference between links that occurs in the other communication device when simultaneously transmitting and receiving data signals using a plurality of links with the other communication device from the other communication device, and based on the first interference information and second interference information regarding interference between links that occurs in the communication device, includes a communication control unit that determines transmission parameters used by the other communication device for transmitting data signals.

[0014] The communication device according to the second aspect of the present technology transmits first interference information regarding interference between links that occurs when simultaneously transmitting and receiving data signals using a plurality of links with the other communication device to the other communication device, and acquires transmission parameters used by the other communication device for transmitting data signals, which are determined by the other communication device based on the first interference information and second interference information regarding interference between links that occurs in the other communication device.

[0015] In the first aspect of the present technology, when simultaneously transmitting and receiving data signals using a plurality of links with the other communication device, first interference information regarding interference between links that occurs in the other communication device is acquired from the other communication device, and based on the first interference information and second interference information regarding interference between links that occurs in the communication device, transmission parameters used by the other communication device for transmitting data signals are determined.

[0016] In the second aspect of the present technology, when simultaneously transmitting and receiving data signals using a plurality of links with the other communication device, first interference information regarding interference between links that occurs is transmitted to the other communication device, and transmission parameters used by the other communication device for transmitting data signals, which are determined by the other communication device based on the first interference information and second interference information regarding interference between links that occurs in the other communication device, are acquired.

Brief Description of the Drawings

[0017]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Figure 11

Figure 12

Figure 13

Figure 14

Figure 15

Figure 16

Figure 17

Figure 18

Embodiments for Carrying Out the Invention

[0018] Hereinafter, embodiments for carrying out the present technology will be described. The description will be carried out in the following order. 1. Configuration of the communication system 2. Regarding Link - to - Link interference 3. First Embodiment: Transmission parameter control using Trigger Frame 4. Second Embodiment: Transmission parameter control using MLO Parameter Set 5. Others

[0019] <<Configuration of the communication system>> FIG. 1 is a diagram showing a configuration example of a communication system according to an embodiment of the present technology.

[0020] The communication system in FIG. 1 is composed of an AP (Access Point) which is a base station and a STA (STAtion) which is a communication terminal operating as a slave device. Although indicated by a circle in FIG. 1, the STA is a device having a wireless communication function by wireless LAN, such as a smartphone, a tablet terminal, a PC, or a TV.

[0021] As shown by the arrows in FIG. 1, the data communication between the AP and the STA is performed by MLO communication that simultaneously uses a plurality of Links, namely Link A and Link B. That is, the AP and the STA are MLO terminals capable of MLO communication.

[0022] By MLO communication, for example, DL communication from the AP to the STA and UL communication from the STA to the AP are performed simultaneously. The data transmitted from the AP to the STA is DL DATA, and the data transmitted from the STA to the AP is UL DATA.

[0023] The channels used as Link A / Link B are channels in any of the frequency bands of 920 MHz band, 2.4 GHz band, and 5 GHz band that are currently allocated as unlicensed bands. Channels in other frequency bands such as 6 GHz band, for which allocation to the unlicensed band is expected in the future, may also be used as Link A / Link B.

[0024] It is also possible to perform MLO communication using channels in different bands as Links, such that one of Link A and Link B is a channel in the 2.4 GHz band and the other is a channel in the 5 GHz band. That is, each Link is composed of a channel in any of the bands regardless of the band.

[0025] MLO communication using three or more Links may be performed between the AP and the STA.

[0026] Note that the system configuration targeted by this technology is not limited to the configuration shown in FIG. 1. This technology is applicable to any communication system configuration as long as there are a plurality of base stations and communication terminals with established connections exist around each base station. The positional relationship of each device is also not limited as long as the above conditions are satisfied.

[0027] FIG. 2 is a block diagram showing a configuration example of a communication device.

[0028] The communication device 1 whose configuration is shown in FIG. 2 also includes the AP and the STA in FIG. 1. The AP and the STA each have the same configuration as that shown in FIG. 2. Note that the communication device 1 may be configured as a part of a device (for example, a communication module or a communication chip, etc.) that constitutes the AP or the STA.

[0029] As shown in FIG. 2, the communication device 1 includes antennas 11A and 11B, wireless communication units 12A and 12B, and a wireless signal processing unit 13. The wireless signal processing unit 13 includes a storage unit 21, a communication control unit 22, a data processing unit 23, data processing units 24A and 24B, and wireless interface units 25A and 25B.

[0030] The storage unit 21 of the wireless signal processing unit 13 stores various information for use by the communication control unit 22. For example, the inter-Link interference information acquired from other communication devices 1 is stored in the storage unit 21. The inter-Link interference information will be described later.

[0031] The communication control unit 22 is configured as a control device for a processor such as a CPU (Central Processing Unit) or a microprocessor, and controls the overall operation of the communication device 1. For example, the communication control unit 22 outputs control information to be notified to other communication devices 1 to the data processing unit 23.

[0032] For example, in the communication control unit 22 of the communication device 1 operating as an AP, based on its own inter-Link interference information and the inter-Link interference information acquired from the communication device 1 operating as a STA, the transmission parameters used by itself and the transmission parameters used by other communication devices 1 are determined. The control information output from the communication control unit 22 to the data processing unit 23 includes the transmission parameters determined by the communication control unit 22.

[0033] The data processing unit 23 (Upper) mainly performs sequence management of the transmission data supplied from the outside and the control information for other communication devices 1 supplied from the communication control unit 22. The data processing unit 23 allocates data signals to each of Link A and Link B.

[0034] In addition, the data processing unit 23 reads the sequence numbers of the received signals supplied from the data processing units 24A and 24B, and allocates the received data and the control information transmitted from other communication devices 1. The received data acquired by the data processing unit 23 is output to the outside.

[0035] The data processing units 24A and 24B (Lower) each generate a transmission signal by modulating the transmission data supplied from the data processing unit 23, and output the signal to the wireless interface units 25A and 25B. The transmission signal of Link A generated by the data processing unit 24A is supplied to the wireless interface unit 25A, and the transmission signal of Link B generated by the data processing unit 24B is supplied to the wireless interface unit 25B.

[0036] Also, the data processing units 24A and 24B each demodulate the reception signal supplied from the wireless interface units 25A and 25B, and output the received data to the data processing unit 23. The received data demodulated by the data processing unit 24A is supplied to the data processing unit 23 as the received data of Link A, and the received data demodulated by the data processing unit 24B is supplied to the data processing unit 23 as the received data of Link B.

[0037] The wireless interface units 25A and 25B each convert a digital signal into an analog signal by performing D / A conversion on the transmission signal supplied from the data processing units 24A and 24B. The wireless interface units 25A and 25B output the transmission analog signal obtained by performing D / A conversion to the wireless communication units 12A and 12B.

[0038] Also, the wireless interface units 25A and 25B each convert an analog signal into a digital signal by performing A / D conversion on the reception signal supplied from the wireless communication units 12A and 12B. The wireless interface units 25A and 25B output the digital signal obtained by performing A / D conversion to the data processing units 24A and 24B as the reception signal.

[0039] The wireless communication units 12A and 12B perform RF processing on the transmission analog signal supplied from the wireless interface units 25A and 25B, and transmit the signal as a wireless signal from the antennas 11A and 11B.

[0040] Further, the wireless communication units 12A and 12B generate received analog signals by performing RF processing on the wireless signals supplied from the antennas 11A and 11B, and output the signals to the wireless interface units 25A and 25B.

[0041] The wireless signal processing unit 13 is realized by, for example, one IC. Instead of all the processing units constituting the wireless signal processing unit 13 being realized by one IC, they may be realized by a plurality of ICs. For example, the wireless interface units 25A and 25B may be realized by an IC different from the IC including other processing units.

[0042] <<Regarding Inter-Link Interference>> FIG. 3 is a diagram for explaining inter-link interference.

[0043] Here, it is assumed that the AP and the STA perform data communication using two links, Link A and Link B, respectively.

[0044] When the AP uses both Link A and Link B for transmitting DL DATA to the STA, inter-link interference does not pose a major problem.

[0045] On the other hand, when the AP receives UL DATA using Link A and transmits DL DATA using Link B, as shown by the arrow #1, the signal transmitted from the wireless communication unit 12B of the AP may cause inter-link interference to the wireless communication unit 12A. In this case, the quality of the received signal of the UL DATA deteriorates in the wireless communication unit 12A.

[0046] Similarly, when the STA uses both Link A and Link B for transmitting UL DATA to the AP, inter-link interference does not pose a major problem.

[0047] On the other hand, when the STA receives DL DATA using Link B and transmits UL DATA using Link A, as shown by arrow #2, the signal transmitted from the wireless communication unit 12A of the STA may cause inter-link interference with the wireless communication unit 12B. In this case, the quality of the received signal of the DL DATA deteriorates in the wireless communication unit 12B.

[0048] When such inter-link interference occurs within the device, the STR operation, which is an operation of simultaneously transmitting and receiving using multiple Links, may become impossible.

[0049] Here, for example, if the AP reduces the transmission power of Link B, the inter-link interference within the AP with respect to Link A is reduced. Also, if the modulation method of the UL communication used in the STA is changed or the coding rate is lowered (by changing the MCS), the possibility of the AP receiving and demodulating the signal of the UL communication increases even in a situation where inter-link interference occurs within the AP.

[0050] In this way, if each MLO terminal can correctly set the transmission parameters of each Link, it is possible to reduce inter-link interference and perform the STR operation normally in both the AP and the STA. Note that the transmission parameters include the transmission power value, MCS, etc.

[0051] As will be described later, in the communication system of FIG. 1, an exchange is performed for each MLO terminal to correctly set the transmission parameters of each Link.

[0052] FIG. 4 is a diagram showing an example of parameters representing the characteristics of MLO communication.

[0053] When UL communication is performed using Link A and DL communication is performed using Link B, as shown in FIG. 4, TxPow AP_B , PL AP_B2A , PL AP2STA_B , TxPow STA_A , PLSTA_A2B , PL AP2STA_A MLO communication is represented by six parameters. Each parameter represents the following content.

[0054] · TxPow AP_B : Transmission power of Link B at the AP (dBm) · PL AP_B2A : Propagation loss of interference between Link B and Link A at the AP (dB) · PL AP2STA_B : Propagation loss of Link B between the AP and the STA (dB) · TxPow STA_A : Transmission power of Link A at the STA (dBm) · PL STA_A2B : Propagation loss of interference between Link A and Link B at the STA (dB) · PL AP2STA_A : Propagation loss of Link A between the AP and the STA (dB)

[0055] Conversely, when DL communication is performed using Link A and UL communication is performed using Link B, TxPow AP_A , PL AP_A2B , PL AP2STA_A , TxPow STA_B , PL STA_B2A , PL AP2STA_B MLO communication is represented by six parameters. Each parameter represents the following content.

[0056] · TxPow AP_A : Transmission power of Link A at the AP (dBm) · PL AP_A2B : Propagation loss of interference between Link A and Link B at the AP (dB) · PL AP2STA_A : Propagation loss of Link A between the AP and the STA (dB) · TxPow STA_B : Transmission power of Link B at the STA (dBm) · PL STA_B2A : Propagation loss of interference between Link B and Link A at the STA (dB) ·PL AP2STA_B : Propagation loss (dB) in Link B between AP and STA

[0057] When MLO communication shown in FIGS. 3 and 4 is performed, the respective Signal-to-Interference Ratios (SIRs) of Link A at the AP and Link B at the STA, which are one of the reception quality indicators, are expressed by the following equations (1) and (2).

Equation

Equation

[0058] Also, when the transmission parameter TxPow is excluded from equations (1) and (2), the following equation (3) is obtained.

Equation

[0059] Therefore, if the values of each variable on the right side of equation (3) are known, it becomes possible to obtain the sum of the SIR of Link A at the AP and the SIR of Link B at the STA.

[0060] Utilizing this, for example, the AP, which is either the AP or the STA, determines the transmission parameters of both the AP and the STA according to the following procedure.

[0061] Step 1: Use equation (3) to determine the target SIRs of the AP and the STA. Step 2: Use equations (1) and (2) to determine TxPow AP_B and TxPow STA_A . Step 3: Determine the optimal MCS of Link B used by the AP and the optimal MCS of Link A used by the STA from the target SIRs.

[0062] The target SIR in step (1) is the sum of the SIR of Link A in the AP and the SIR of Link B in the STA. The target SIR must be equal to or less than the value obtained by Equation (3) (SIR AP_A + SIR STA_B ).

[0063] The target SIRs of the AP and the STA are determined, for example, by presetting the SIR value of either one of them and obtaining the SIR value of the other from Equation (3). The target SIRs of the AP and the STA may be determined by simply bisecting the sum of the SIRs of the AP and the STA.

[0064] When the result obtained by Equation (3) is not a sufficient value, control can also be performed such that the STR operation is not carried out.

[0065] Note that by calculating using the SINR with added Noise instead of the SIRs in the above equations (1) to (3), it becomes possible to more accurately determine the transmission parameters. In this case, the Noise amounts of each Link of the AP and the STA are measured in advance, and the calculations of each equation are performed using the Noise amounts. When the Noise amount is small compared to the degree of interference, it is also possible to obtain accurate transmission parameters by using the SIR.

[0066] From the above, if either the AP or the STA knows the propagation losses of Link A and Link B and the propagation losses of the interference between Links in each of the AP and the STA, it can determine the transmission parameters used for the STR operation.

[0067] The propagation losses of Link A and Link B can be obtained using existing protocols such as Measurement and Sounding.

[0068] On the other hand, regarding the propagation losses of the interference between Links in each of the AP and the STA, it is necessary to newly notify (transmit and receive) them as communication parameters.

[0069] In addition, a mechanism for notifying the transmission parameters determined by one party to the other party is required.

[0070] In the following, as methods for controlling transmission parameters during STR operation, including notification of propagation loss of Link - to - Link interference, the following two methods will be described in order. · First Embodiment: Transmission Parameter Control Using Trigger Frame · Second Embodiment: Transmission Parameter Control Using MLO Parameter Set

[0071] <<First Embodiment: Transmission Parameter Control Using Trigger Frame>> <Example of Sequence> FIG. 5 is a diagram showing a sequence in transmission parameter control using a Trigger Frame.

[0072] The upper part of FIG. 5 shows the transmission and reception contents of Link A and Link B at the AP, and the lower part shows the transmission and reception contents of Link A and Link B at the STA. The same applies to FIGS. 13 and 15 described later.

[0073] As shown by the double - headed arrow below FIG. 5, the transmission parameter control using a Trigger Frame is composed of two phases: the MLO Setup Phase and the MLO Tx Phase.

[0074] · MLO Setup Phase In the MLO Setup Phase, the exchange of Multi - Link Elements is performed between the AP and the STA. The Multi - Link Element includes Link - to - Link interference information, which is information representing the power of Link - to - Link interference.

[0075] The Multi-Link Element is an element used for the MLO terminal to notify the MLO's Capability information. The Capability information includes information about MLO by the wireless communication units 12A and 12B.

[0076] The Multi-Link Element is transmitted using predetermined frames such as Beacon Frame, DMG Beacon Frame, (Re)Association Request Frame, (Re)Association Response Frame, Probe Response Frame. The Beacon Frame and DMG Beacon Frame are notification signals. Also, the (Re)Association Request Frame, (Re)Association Response Frame, and Probe Response Frame are signals used at the time of connection.

[0077] In the example of FIG. 5, as shown by arrow #11, from the AP to the STA, using Link A, a Multi-Link Element including the inter-link interference information of Link A in the AP is transmitted. The inter-link interference information of Link A transmitted from the AP using Link A represents, in the AP, the power of the inter-link interference that Link A receives from Link B.

[0078] Also, as shown by arrow #12, from the STA to the AP, using Link A, a Multi-Link Element including the inter-link interference information in the STA is transmitted. The inter-link interference information of Link A transmitted from the STA using Link A represents, in the STA, the power of the inter-link interference that Link A receives from Link B.

[0079] As shown by arrow #13, from the AP to the STA, a Multi-Link Element including the inter-link interference information of Link B in the AP is transmitted using Link B. The inter-link interference information of Link B transmitted from the AP using Link B represents, at the AP, the power of the inter-link interference that Link B receives from Link A.

[0080] As shown by arrow #14, from the STA to the AP, a Multi-Link Element including the inter-link interference information of Link B in the STA is transmitted using Link B. The inter-link interference information of Link B transmitted from the STA using Link B represents, at the STA, the power of the inter-link interference that Link B receives from Link A.

[0081] By exchanging the Multi-Link Element, the AP and the STA can share the inter-link interference information with each other.

[0082] Note that a single frame may contain multiple Multi-Link Elements. In this case, the multiple Multi-Link Elements are described in the frame in a predetermined order. Each of the multiple Multi-Link Elements contains BSS information (such as band, channel, BSSID, etc.) including the inter-link interference information of a different link.

[0083] For example, when the AP transmits a frame including multiple Multi-Link Elements using a certain link, the STA can sequentially refer to the Multi-Link Elements described in the frame from the beginning and attempt to connect using a link different from the link used for transmitting the frame based on the BSS information.

[0084] Also, the STA can refer to the Multi-Link Element including the BSS information of that Link in the order of Links not affected by the inter-Link interference based on its own inter-Link interference information and attempt to make a connection.

[0085] That is, the STA can select the Multi-Link Elements including the BSS information of Links different from the Link used for frame transmission in any order and attempt to make a connection to the AP based on the BSS information described in the selected Multi-Link Elements.

[0086] On the other hand, the AP can arrange the Multi-Link Elements in the order of Links not affected by the inter-Link interference based on its own inter-Link interference information and transmit a frame including a plurality of Multi-Link Elements. The Multi-Link Element including the BSS information of the Link least affected by the inter-Link interference will be described at the head of the arrangement of the plurality of Multi-Link Elements. The rearrangement of the Multi-Link Elements is performed, for example, according to the control by the communication control unit 22 of the AP.

[0087] When the AP controls the whole, that is, when the AP determines both the transmission parameters of the AP and the transmission parameters of the STA, the inter-Link interference information of the AP may not be included in the Multi-Link Element transmitted by the AP. In this case, the inter-Link interference information of the AP will not be notified to the STA.

[0088] Note that the inter-Link interference information may not be defined as the information within the element. For example, the inter-Link interference information may be defined as the information included in any one of the Control Frame, Action Frame, and Management Frame. That is, it is possible to include the inter-Link interference information in various types of information transmitted and received between the AP and the STA.

[0089] ·MLO Tx Phase In the MLO Tx Phase, data is transmitted and received between the AP and the STA using two links, Link A and Link B.

[0090] At this time, the AP includes the STR Trigger Frame in the transmitted data and notifies the STA of the transmission parameters of the STA during the STR operation. The STR Trigger Frame is used for the AP to notify the STA of the transmission parameters of the STA.

[0091] In the example of FIG. 5, as shown by arrow #21, transmission data including the STR Trigger Frame is transmitted from the AP to the STA using Link A. The STR Trigger Frame transmitted using Link A includes the transmission parameters used when the STA transmits data to the AP using Link A.

[0092] Also, as shown by arrow #22, transmission data including the STR Trigger Frame is transmitted from the AP to the STA using Link B. The STR Trigger Frame transmitted using Link B includes the transmission parameters used when the STA transmits data to the AP using Link B.

[0093] Note that the transmitted data is composed of a PPDU (PLCP Protocol Data Unit) with a PHY Header added to the head of a plurality of frames including the STR Trigger Frame. In FIG. 5, a continuous strip of transmitted data represents one PPDU. The STR Trigger Frame is arranged in the hatched part of the PPDU.

[0094] After the AP sends an STR Trigger Frame to the STA using Link A, as shown by arrow #23, the STA sends a Block Ack (BA) to the AP using Link A. The transmission of the Block Ack is performed using the transmission parameters included in the STR Trigger Frame. The STR Trigger Frame sent from the AP to the STA includes transmission parameters and serves as an induction signal that induces the STA to transmit a BA using the transmission parameters notified by the STR Trigger Frame.

[0095] After the STA sends a Block Ack to the AP using Link A, as shown by arrow #24, the AP sends transmission data to the STA using Link A.

[0096] In FIG. 5, after the AP transmits data to the STA, as shown by arrows #25 and #26, the STA transmits a Block Ack to the AP using Link A and Link B. If permitted by the AP, the STA can also transmit data other than the Block Ack to the AP. For example, when data transmission is permitted by a Trigger Frame, the STA can start transmitting UL DATA using the transmission parameters for the STR operation.

[0097] Also, in FIG. 5, while the AP receives inter-link interference from Link A, it can perform the carrier sense operation defined in the IEEE 802.11 standard using Link B and detect other signals. As will be described later, the AP determines the transmission power of Link A so as to reduce the inter-link interference with Link B and performs the carrier sense operation using Link B.

[0098] ·Data Structure of the Multi-Link Element FIG. 6 is a diagram showing an example of the data structure of a Multi-Link Element used in the MLO Setup Phase.

[0099] The Multi-Link Element has a data structure based on the Multi-Band Element defined in IEEE802.11-2016. At the beginning of the Multi-Link Element, an Element ID indicating that it is a Multi-Link Element is described.

[0100] In the Multi-Link Control field, a Link Interference Info. Present subfield is defined as shown in the lower part of FIG. 6. Also, as shown in the middle part of FIG. 6, Link Interference Info. is defined at the end of the Multi-Link Element.

[0101] The Link Interference Info. Present subfield indicates whether Link Interference Info. is included in the Multi-Link Element.

[0102] For example, a value of 1 in the Link Interference Info. Present subfield represents that Link Interference Info. is included in the Multi-Link Element. On the other hand, a value of 0 in the Link Interference Info. Present subfield represents that Link Interference Info. is not included in the Multi-Link Element.

[0103] Link Interference Info. is the above-mentioned Link Interference Level.

[0104] Link interference information indicates the power of inter-link interference at the STA, which is received by Link B when, for example, a signal is transmitted from the STA to the AP at the maximum transmission power using Link A specified by the Band ID, Operating Class, and Channel Number within the Multi-Link Element. The power indicated by the Link Interference Info. is shown as a binary integer, for example, in units of dBm.

[0105] Also, when the power indicated by the Link Interference Info. is 0, it means that the STA can perform STR operations without the need for the AP to control the STA's transmission parameters. On the other hand, when the Link Interference Info. is 255 (the maximum value in 8-bit representation), it means that the STA cannot perform STR operations.

[0106] Note that the data structure of the Multi-Link Element is not limited to the structure shown in FIG. 6. It is possible to adopt various structures that include frequency information (including band and channel) of other links and link interference information as the data structure of the Multi-Link Element.

[0107] For example, it is possible to adopt as the data structure of the Multi-Link Element a structure that includes the start / end Band ID or Channel Number of the frequency band and in which common link interference information is described for a section of a certain frequency band (up to W52 / 53 or W56, etc.).

[0108] Regarding the link interference information, it may be shown in hierarchical units instead of in integer units of power.

[0109] A field indicating that the STR operation is impossible may be provided separately from the field of the inter - Link interference information. If each field of the BSS information, frequency information, and inter - Link interference information is included, other fields may not be provided in the Multi - Link Element.

[0110] · Data structure of the STR Trigger Frame FIG. 7 is a diagram showing an example of the data structure of the STR Trigger Frame used in the MLO Tx Phase.

[0111] The STR Trigger Frame has a data structure based on the Trigger Frame defined in P802.11ax_D4.0. At the beginning of the STR Trigger Frame, a MAC header including Frame Control is arranged.

[0112] At the beginning of the Common Info field following the MAC header, the Trigger Type is described as shown by the circle in the middle of FIG. 7. As a new Trigger Type, STR Trigger is defined. Also, within the Trigger Dependent User Info in the User Info field, STR MCS and STR Target RSSI are newly defined.

[0113] FIG. 8 is a diagram showing an example of the value of the Trigger Type subfield.

[0114] As underlined in FIG. 8, the Trigger Type subfield value = 8 is defined as the value indicating the STR Trigger.

[0115] FIG. 9 is a diagram showing an example of the User Info field of the STR Trigger Frame.

[0116] At the end of the User Info field, Trigger Dependent User Info is described as enclosed in a circle. As described above, STR MCS and STR Target RSSI are included in Trigger Dependent User Info. Other subfields within the User Info field are the same as those defined in P802.11ax.

[0117] Figure 10 is a diagram showing an example of subfields included in the Trigger Dependent User Info subfield in the STR Trigger Frame.

[0118] As shown in Figure 10, the Trigger Dependent User Info subfield defines an STR MCS subfield and an STR Target RSSI subfield.

[0119] The STR MCS is described in the STR MCS subfield. The STR MCS represents the MCS information of the EHT TB PPDU as information regarding the modulation method used when performing the STR operation.

[0120] The STR Target RSSI is described in the STR Target RSSI subfield. The STR Target RSSI represents the expected average received power of the EHT TB PPDU at the antenna terminal point of the AP when performing the STR operation. In other words, the STR Target RSSI is information specifying the transmission power of the STA. The resolution of the expected power value is in 1 dB units. Details of the expected average received power of the EHT TB PPDU are specified in P802.11ax_D4.0.

[0121] When performing an STR operation using an STR Trigger Frame having the data structure as described above, transmission parameters used during the STR operation are notified. On the other hand, when not performing the STR operation, as in the conventional case, transmission parameters of the EHT TB PPDU are notified using the User Info field. The STR Trigger Frame also includes transmission parameters used when not performing the STR operation.

[0122] By including the transmission parameters for the case of performing the STR operation and the transmission parameters for the case of not performing the STR operation in the STR Trigger Frame, the AP does not need to pre-determine whether to perform the STR operation and change the description content of the frame according to the determination result.

[0123] Note that the information included in the Trigger Dependent User Info is not limited to the above two pieces of information. For example, other parameters such as FEC and DCM may be newly defined as transmission parameters for the STR operation and included in the Trigger Dependent User Info.

[0124] Also, regarding Length, CS Required, BW, etc. included in the Common Info field (Figure 7), the transmission parameters for the STR operation may be included in the Trigger Dependent Common Info. For example, when notifying the transmission parameters used when the STA transmits a Block Ack in the STR Trigger Frame, in addition to the above-described STR MCS and STR Target RSSI, the parameters notified in the MU-BAR variant may be included in the STR Trigger Frame.

[0125] Also, the STR MCS and STR Target RSSI may be included, for example, in the TRS Control field defined in P802.11ax_D4.0.

[0126] <Operation of Each Device> Here, the operations of the AP and STA when controlling transmission parameters using the Trigger Frame will be described.

[0127] The processes shown in FIGS. 11 and 12 are the processes of the AP and STA in the MLO Tx Phase. By performing the MLO Setup Phase, the mutual link interference information is shared between the AP and the STA.

[0128] ·Operation of AP First, referring to the flowchart of FIG. 11, the communication process of the AP will be described.

[0129] In step S1, the communication control unit 22 of the AP acquires the transmission right of, for example, Link A.

[0130] In step S2, the communication control unit 22 of the AP determines whether there is a possibility of performing the STR operation.

[0131] For example, based on whether Link B is in the Busy state (whether the NAV Timer is set) until the transmission on Link A for which the transmission right has been acquired ends, it is determined whether there is a possibility of performing the STR operation. If Link B is in the Busy state until the transmission on Link A ends, it is determined that there is no possibility of performing the STR operation.

[0132] Based on the content of the Multi-Link Element exchanged between the AP and the STA, it may be determined whether there is a possibility of performing the STR operation. For example, if the power of the interference between links in the STA is higher than the threshold value, it is determined that there is no possibility of performing the STR operation.

[0133] If it is determined in step S2 that there is no possibility of performing the STR operation, in step S3, the communication control unit 22 of the AP determines the transmission parameters of Link A and Link B used by the AP itself without considering the influence of link interference.

[0134] On the other hand, if it is determined in step S2 that there is a possibility of performing the STR operation, the process proceeds to step S4. In step S4, the communication control unit 22 of the AP determines the transmission parameters of Link A and Link B based on the inter-Link interference information acquired from the STA and its own inter-Link interference information. Here, the transmission parameters of the AP itself and the STA are determined using the above equations (1) to (3).

[0135] In step S5, the communication control unit 22 of the AP determines whether it is necessary to have the STA control the transmission parameters of Link A during the transmission on Link B. This determination is made in consideration of the STR operation of the AP that receives the signal on Link A.

[0136] If it is determined in step S5 that it is necessary to have the STA control the transmission parameters, in step S6, the communication control unit 22 of the AP adds the STR Trigger Frame to the transmission data.

[0137] In step S7, the communication control unit 22 of the AP starts data transmission to the STA using Link A. If the STR Trigger Frame is added in step S6, the STR Trigger Frame is transmitted to the STA, and thereby the transmission parameters are notified.

[0138] On the other hand, if it is determined in step S5 that there is no need to have the transmission parameters controlled, the process of step S6 is skipped. In this case, data transmission to the STA is started using Link A in step S7 without adding the Trigger Frame.

[0139] For example, even if the AP transmits data to be transmitted with the maximum power using Link A, if there is no impact on the reception of data in Link B, it is determined that there is no need to have the transmission parameters controlled. When the frequencies of the channels used as Link A and the frequencies of the channels used as Link B are far apart, the interference between the Links is reduced.

[0140] Similarly, when the transmission parameters of Link A and Link B are determined in step S3 without considering the impact of interference between the Links, in step S7, data transmission to the STA is started using Link A.

[0141] Although not shown in FIG. 11, after this, when the AP acquires the transmission right of Link B, the AP will start data transmission on Link B using the previously determined transmission parameters.

[0142] Note that when it is determined based on the interference information between the Links that there is no possibility of performing the STR operation, the start of data transmission using Link A of the STA may be delayed.

[0143] · Operations of the STA Next, with reference to the flowchart of FIG. 12, the communication process of the STA will be described.

[0144] In step S11, the communication control unit 22 of the STA, for example, ends the reception of the data signal on Link A.

[0145] In step S12, the communication control unit 22 of the STA determines whether or not an STR Trigger Frame is included in the received data signal.

[0146] When it is determined in step S12 that the STR Trigger Frame is included, in step S13, the communication control unit 22 of the STA determines whether or not it is receiving a data signal on Link B.

[0147] If it is determined in step S13 that a data signal is being received on Link B, the process proceeds to step S14.

[0148] In step S14, the communication control unit 22 of the STA determines transmission parameters based on the transmission parameter information included in the Trigger Dependent User Info within the User Info field of the STR Trigger Frame. The transmission parameter information is the above-described STR MCS and STR Target RSSI determined at the AP as the transmission parameters to be used by the STA (Fig. 10). In this way, the STA acquires the transmission parameters based on the transmission parameter information included in the Trigger Dependent User Info. Further, the communication control unit 22 of the STA starts transmitting a data signal to the AP using Link A.

[0149] Even if a data signal is being received on Link B, if it is known from the Length information or the like that the reception of the data signal on Link B ends when data transmission is started using Link A, the transmission of the data signal to the AP may be started in step S15.

[0150] If other transmission parameters are included in the Trigger Dependent User Info, the communication control unit 22 of the STA determines the transmission parameters accordingly.

[0151] Regarding information not included in the Trigger Dependent User Info, the communication control unit 22 of the STA determines the transmission parameters based on the information included in the User Info field. If there are also parameters in the STR Trigger Dependent Common, the transmission parameters are also determined according to those parameters.

[0152] On the other hand, if it is determined in step S13 that no data signal is being received on Link B, the process proceeds to step S15.

[0153] In step S15, the communication control unit 22 of the STA determines transmission parameters based on the transmission parameter information included in the User Info field of the STR Trigger Frame, and starts transmitting a data signal to the AP using Link A.

[0154] On the other hand, if it is determined in step S12 that the STR Trigger Frame is not included in the data signal from the AP, the process proceeds to step S16.

[0155] In step S16, the communication control unit 22 of the STA determines whether no data signal is being received on Link B or whether the STR operation is possible.

[0156] If it is determined in step S16 that no data signal is being received on Link B or that the STR operation is possible, then in step S17, the communication control unit 22 of the STA starts transmitting a data signal on Link A using the transmission parameters determined by itself.

[0157] On the other hand, if it is determined in step S16 that a data signal is being received on Link B and that the STR operation is not possible, then in step S18, the communication control unit 22 of the STA waits for the transmission of a data signal on Link A. At this time, the transmission parameters may be determined based on the transmission parameter information indicated by the most recently received Trigger Frame, and data transmission may be started using those transmission parameters.

[0158] In this way, in the STA, the transmission parameters to be used are determined according to the states of the wireless communication units 12A and 12B.

[0159] <Modification Example> FIG. 13 is a diagram showing another sequence in transmission parameter control using a Trigger Frame.

[0160] The sequence shown in FIG. 13 is different from the sequence shown in FIG. 5 in that, during the MLO Setup Phase, the exchange of Multi-Link Elements between the AP and the STA is performed only on one Link, for example, Link A, instead of being performed on each of Link A and Link B.

[0161] In the example of FIG. 13, as shown by arrow #51, a Multi-Link Element including link interference information at the AP is transmitted from the AP to the STA using Link A. Also, as shown by arrow #52, a Multi-Link Element including link interference information at the STA is transmitted from the STA to the AP using Link A.

[0162] FIG. 14 is a diagram showing an example of the data structure of the Multi-Link Element in which transmission and reception are performed in the sequence of FIG. 13.

[0163] The data structure shown in FIG. 14 is different from the structure shown in FIG. 6 in that, as shown in the middle of FIG. 14, a Reverse Link Interference Info. subfield is added at the end of the Multi-Link Element.

[0164] When a Multi-Link Element having the data structure of FIG. 14 is transmitted using Link A, the Link Interference Info. Subfield includes information regarding the power of the link interference from Link B to Link A. Also, the Reverse Link Interference Info. subfield includes information regarding the link interference power from Link A to Link B.

[0165] In this way, it is also possible to describe the inter-link interference information of Link A and the inter-link interference information of Link B in one Multi-Link Element so that the inter-link interference information can be notified.

[0166] <<Second Embodiment: Transmission Parameter Control Using MLO Parameter Set>> <Example of Sequence> FIG. 15 is a diagram showing a sequence in transmission parameter control using an MLO Parameter Set.

[0167] The sequence shown in FIG. 15 is different from the sequence shown in FIG. 5 in that an MLO Parameter Set Element is transmitted from the AP to the STA between the MLO Setup Phase and the MLO Tx Phase. The MLO Parameter Set Element is an element used to notify the transmission parameters of the STA. In the MLO Tx Phase, the STR Trigger Frame is not transmitted.

[0168] In the example of FIG. 15, after the transmission and reception of the Multi-Link Element in the MLO Setup Phase, as shown by arrows #101 and #102, the MLO Parameter Set Element is transmitted from the AP to the STA using Link A and Link B.

[0169] The MLO Parameter Set Element is transmitted using a predetermined frame such as a Beacon Frame, a DMG Beacon Frame, a (Re)Association Request Frame, or a (Re)Association Response Frame. In an Infrastructure BSS, the MLO Parameter Set Element is used by the AP to control the transmission parameters of the STA during the STR operation.

[0170] When a frame containing an MLO Parameter Set Element is transmitted multiple times, at the STA, the MLO Parameter Set Element included in the most recently received frame is used to update the transmission parameters.

[0171] Note that the information included in the MLO Parameter Set Element may be defined as information of frames other than the element. For example, it is possible to define the information included in the MLO Parameter Set Element as information included in any of a Control Frame, an Action Frame, and a Management Frame.

[0172] Figure 16 is a diagram showing a configuration example of the MLO Parameter Set Element.

[0173] As shown in Figure 16, the MLO Parameter Set Element includes STR MCS and STR Target RSSI. As described with reference to Figure 10, STR MCS and STR Target RSSI are transmission parameters used when performing the STR operation.

[0174] <Operation of Each Device> Here, the operations of the AP and the STA during transmission parameter control using the MLO Parameter Set will be described.

[0175] The processes shown in Figures 17 and 18 are processes performed by the AP and the STA after the MLO Setup Phase. By performing the MLO Setup Phase, link interference information between the AP and the STA is shared.

[0176] ·Operation of AP First, with reference to the flowchart of Figure 17, the communication process of the AP will be described.

[0177] The processes of steps S21 to S25 in FIG. 17 are the same as the processes of steps S1 to S4 and S7 in FIG. 11, respectively. That is, the transmission of the STR Trigger Frame is not performed. Redundant explanations will be omitted as appropriate.

[0178] In step S21, the communication control unit 22 of the AP acquires the transmission right of, for example, Link A.

[0179] In step S22, the communication control unit 22 of the AP determines whether there is a possibility of performing the STR operation.

[0180] If it is determined in step S22 that there is no possibility of performing the STR operation, in step S23, the communication control unit 22 of the AP determines the transmission parameters of Link A and Link B used by the AP itself without considering the influence of inter-link interference.

[0181] On the other hand, if it is determined in step S22 that there is a possibility of performing the STR operation, in step S24, the communication control unit 22 of the AP determines the transmission parameters of Link A and Link B based on the inter-link interference information acquired from the STA and its own inter-link interference information. Here, using the above equations (1) to (3), the transmission parameters of the AP itself and the STA are determined.

[0182] After determining the transmission parameters in step S23 or step S24, in step S25, the communication control unit 22 of the AP starts data transmission to the STA using Link A. If the transmission parameters of the AP itself and the STA are determined in step S24, before data transmission, the transmission parameters of the STA are notified from the AP to the STA using the MLO Parameter Set as appropriate.

[0183] · Operation of the STA Next, with reference to the flowchart of FIG. 18, the communication process of the STA will be described.

[0184] In step S31, the communication control unit 22 of the STA ends the reception of the data signal on, for example, Link A.

[0185] In step S32, the communication control unit 22 of the STA determines whether it is receiving a data signal on Link B.

[0186] If it is determined in step S32 that a data signal is being received on Link B, in step S33, the communication control unit 22 of the STA starts transmitting a data signal to the AP using Link A with the transmission parameters specified in the last received MLO Setup Element.

[0187] On the other hand, if it is determined in step S32 that a data signal is not being received on Link B, in step S34, the communication control unit 22 of the STA starts transmitting a data signal on Link A using the transmission parameters determined by itself.

[0188] In this way, it is possible to use the MLO Parameter Set to notify the transmission parameters.

[0189] <<Others>> · Application examples In the above, the case where the number of Links used for MLO communication is two has been mainly described, but MLO communication may be performed using three or more Links.

[0190] In this case, the formula used to determine the transmission parameters becomes more complex compared to the above formulas (1) to (3), but it is possible to calculate the transmission parameters based on the propagation loss and the inter-Link interference information in the same way as in the case of using two Links. Regarding information such as BSSID, Operating Class, Channel Number, and Band ID included in FIGS. 6 and 14, a plurality of them may be included in the same element.

[0191] Although the transmission parameters in the STR operation have been mainly described, the present technology is also applicable to other controls.

[0192] For example, when starting to transmit a data signal on Link A, due to the influence of inter-link interference, it may not be possible to sufficiently detect the signal by carrier sense using Link B. Even in such a case, by appropriately determining the transmission parameters of Link A based on inter-link interference information, etc., it becomes possible to improve the success probability of carrier sense of Link B.

[0193] Although the case where the AP notifies the STA of the transmission parameters during the STR operation has been described, the STA may also notify the AP of the transmission parameters. In this case, the STA will control the transmission parameters during the STR operation of the AP.

[0194] When the STA controls the transmission parameters during the STR operation of the AP, the same processing as the above-described processing of the AP is performed by the STA. Conversely, the same processing as the above-described processing of the STA is performed by the AP.

[0195] In this way, it is possible to control the transmission parameters during the STR operation by various communication devices other than the AP.

[0196] Information indicating that the transmission parameters notified from the AP are being applied to the STR operation may be included in the transmission data transmitted from the STA to the AP. The STA will notify the AP that the STR operation is being performed using the transmission parameters determined by the AP.

[0197] To transmit information indicating that the transmission parameters are being applied to the STR operation, for example, a 1-bit field may be reserved in the SIG of the Preamble or in the Control Field.

[0198] ·Regarding the effects In an MLO terminal capable of performing data transmission using a plurality of Links, by exchanging in advance the interference between each Link on the transmission side and the reception side, it becomes possible to determine transmission parameters that are not affected by the interference between Links that occurs during the STR operation.

[0199] Also, for example, even when the data transmission times of Link A and Link B do not match and the data transmission of Link A ends first, the transmission side can receive a Block Ack on Link A while continuing to transmit a data signal on Link B. As a result, operations that cause overhead, such as shortening the transmission time of Link B or padding Link A until the data transmission of Link B ends, become unnecessary.

[0200] According to the transmission parameter control using a Trigger Frame as the first embodiment, the AP can notify and set appropriate transmission parameters to the receiving STA by inserting a Trigger Frame for Multi-Link into the transmission data.

[0201] Also, by including the transmission parameters when the STR operation is not performed together with the transmission parameters for the STR operation in the Trigger Frame and notifying them, it becomes unnecessary to control the transmission parameters for the normal operation when the STR operation is not performed. That is, when the STR operation is not performed in the STA, the AP does not need to notify the STA of the transmission parameters for the normal operation separately from the transmission parameters for the STR operation.

[0202] According to the transmission parameter control using an MLO Parameter Set as the second embodiment, the AP can control the transmission parameters of the STA without adding information (frames) for each data transmission by setting the transmission parameters in advance before starting data transmission using Multi-Link.

[0203] This technology has a wide range of applications and can be implemented with few changes from the existing IEEE802.11 specifications.

[0204] · Example of a program The above-described series of processes can be executed either by hardware or by software. When the series of processes is executed by software, the program constituting the software is installed from a program recording medium into a computer in which the program is incorporated into dedicated hardware, or a general-purpose personal computer or the like.

[0205] The program executed by the computer may be a program in which processing is performed in time series in the order described in this specification, or a program in which processing is performed in parallel or at a necessary timing such as when a call is made.

[0206] In this specification, a system means a collection of a plurality of components (devices, modules (parts), etc.), and it does not matter whether all the components are in the same housing. Therefore, a plurality of devices housed in separate housings and connected via a network, and a single device in which a plurality of modules are housed in one housing are both systems.

[0207] Note that the effects described in this specification are merely examples and are not limiting, and there may be other effects.

[0208] The embodiments of this technology are not limited to the above-described embodiments, and various changes can be made without departing from the gist of this technology.

[0209] <Example of configuration combination> This technology can also have the following configuration.

[0210] (1) When simultaneously transmitting and receiving data signals using a plurality of Links with another communication device, obtain first interference information regarding interference between Links occurring in the other communication device from the other communication device, and based on the first interference information and second interference information regarding interference between Links occurring in the communication device, determine transmission parameters used by the other communication device for transmitting data signals, and include a communication control unit Communication device (2) Further include a plurality of wireless communication units that transmit and receive data signals to and from the other communication device using different Links respectively The communication control unit transmits an element including the second interference information and Capability information regarding communication in the plurality of wireless communication units to the other communication device The communication device according to (1) above (3) The communication control unit transmits a notification signal that is a frame including one or more of the elements, or a signal used at connection, to the other communication device The communication device according to (2) above (4) The communication control unit rearranges the plurality of elements according to the second interference information The communication device according to (2) or (3) above (5) The communication control unit generates an element including information regarding interference between Links received by the wireless communication unit that transmits a data signal as the second interference information The communication device according to any one of (2) to (4) above (6) The communication control unit generates an element including information regarding interference between Links received by the wireless communication unit that transmits a data signal and information regarding interference between Links received by another wireless communication unit that transmits a data signal The communication device according to any one of (2) to (5) above (7) When the communication control unit simultaneously transmits and receives data signals, it determines the transmission parameters used by the other communication device and notifies the other communication device of the same. The communication device according to any one of (2) to (6). (8) The communication control unit determines, as the transmission parameters, information regarding a modulation method and information regarding transmission power. The communication device according to (7). (9) The communication control unit generates an induction frame that includes the transmission parameters and induces the other communication device to transmit a data signal using the transmission parameters. The communication device according to (7) or (8). (10) The communication control unit generates a notification signal that is a frame including the transmission parameters, or a signal used at the time of connection. The communication device according to any one of (7) to (9). (11) Based on the first interference information and the second interference information, the communication control unit determines the transmission parameters of the communication device to be used when simultaneously transmitting and receiving data signals in a plurality of the wireless communication units. The communication device according to any one of (2) to (10). (12) A communication device When simultaneously transmitting and receiving data signals using a plurality of Links with another communication device, acquires first interference information regarding interference between Links occurring in the other communication device from the other communication device, Based on the first interference information and second interference information regarding interference between Links occurring in the communication device, determines transmission parameters used by the other communication device for transmitting a data signal. An information processing method. (13) When transmitting and receiving data signals simultaneously using multiple Links with another communication device, it transmits first interference information regarding interference between the Links that occurs to the other communication device, and acquires transmission parameters used for transmitting a data signal, which are determined by the other communication device based on the first interference information and second interference information regarding interference between the Links that occurs in the other communication device. It includes a communication control unit. Communication device. (14) The communication control unit acquires the transmission parameters included in an induction frame that induces transmission of a data signal using the transmission parameters. The communication device according to (13) above. (15) It further includes a plurality of wireless communication units that transmit and receive data signals to and from the other communication device using different Links respectively. The communication control unit determines the transmission parameters to be used according to the states of the plurality of wireless communication units. The communication device according to (14) above. (16) When transmitting and receiving data signals simultaneously, the communication control unit transmits a data signal using the transmission parameters included in the induction frame. The communication device according to (14) above. (17) The communication control unit acquires the transmission parameters included in a notification signal that is a frame including the transmission parameters, or the transmission parameters included in a signal used at connection. The communication device according to any one of (13) to (16) above. (18) The communication control unit transmits a data signal using the last acquired transmission parameters. The communication device according to any one of (13) to (17) above. (19) The communication device When transmitting and receiving data signals simultaneously using multiple Links with another communication device, it transmits first interference information regarding interference between the Links that occurs to the other communication device. Obtain transmission parameters used for transmitting a data signal, which are determined by the other communication device based on the first interference information and second interference information regarding interference between Links occurring in the other communication device. Information processing method.

Explanation of symbols

[0211] 1 Communication device, 11A, 11B Antenna, 12A, 12B Wireless communication unit, 13 Wireless signal processing unit, 21 Storage unit, 22 Communication control unit, 23 Data processing unit, 24A, 24B Data processing unit, 25A, 25B Wireless interface unit

Claims

1. When simultaneously transmitting and receiving data signals using a plurality of Links with another communication device, obtain first interference information regarding interference between the Links occurring in the other communication device from the other communication device, and based on the first interference information and second interference information regarding interference between the Links occurring in the communication device, a communication control unit that determines transmission parameters used by the other communication device for transmitting data signals. Communication device.

2. Further includes a plurality of wireless communication units that transmit and receive data signals to and from the other communication device using different Links respectively, The communication control unit transmits an element including the second interference information and Capability information regarding communication in the plurality of wireless communication units to the other communication device. The communication device according to claim 1.

3. The communication control unit transmits a notification signal that is a frame including one or more of the elements, or a signal used at connection to the other communication device. The communication device according to claim 2.

4. The communication control unit rearranges the plurality of elements according to the second interference information. The communication device according to claim 2.

5. The communication control unit generates an element including information regarding interference between the Links received by the wireless communication unit that transmits the data signal as the second interference information. The communication device according to claim 2.

6. The communication control unit generates an element including information regarding interference between the Links received by the wireless communication unit that transmits the data signal and information regarding interference between the Links received by the other wireless communication unit that transmits the data signal. The communication device according to claim 2.

7. The communication control unit determines the transmission parameters used by the other communication device when simultaneously transmitting and receiving data signals, and notifies the other communication device. The communication device according to claim 1.

8. The communication control unit determines, as the transmission parameters, information regarding a modulation method and information regarding transmission power. The communication device according to claim 7.

9. The communication control unit generates an induction frame that includes the transmission parameters and induces the other communication device to transmit a data signal using the transmission parameters. The communication device according to claim 7.

10. The communication control unit generates a notification signal that is a frame including the transmission parameters, or a signal used at connection. The communication device according to claim 7.

11. The communication control unit determines transmission parameters of the communication device to be used when simultaneously transmitting and receiving data signals in a plurality of the wireless communication units based on the first interference information and the second interference information. The communication device according to claim 2.

12. When a communication device simultaneously transmits and receives data signals using a plurality of Links with another communication device, obtains first interference information regarding interference between the Links occurring in the other communication device from the other communication device, and determines transmission parameters used by the other communication device for transmitting a data signal based on the first interference information and second interference information regarding interference between the Links occurring in the communication device. Information processing method.

13. When simultaneously transmitting and receiving data signals using a plurality of Links with another communication device, transmits first interference information regarding interference between the Links that occurs to the other communication device, and obtains transmission parameters used for transmitting a data signal, which are determined by the other communication device based on the first interference information and second interference information regarding interference between the Links occurring in the other communication device, and includes a communication control unit. Communication device.

14. The communication control unit obtains the transmission parameters included in an induction frame that induces transmission of a data signal using the transmission parameters. The communication device according to claim 13.

15. Further includes a plurality of wireless communication units that transmit and receive data signals to and from the other communication device using different Links respectively, and the communication control unit determines the transmission parameters to be used according to the states of the plurality of wireless communication units. The communication device according to claim 14.

16. When simultaneously transmitting and receiving a data signal, the communication control unit transmits the data signal using the transmission parameters included in the induction frame. The communication device according to claim 14.

17. The communication control unit obtains the transmission parameters included in a notification signal that is a frame including the transmission parameters, or the transmission parameters included in a signal used at the time of connection. The communication device according to claim 13.

18. The communication control unit transmits a data signal using the last obtained transmission parameters. The communication device according to claim 13.

19. When a communication device When simultaneously transmitting and receiving data signals using a plurality of Links with another communication device, transmit first interference information regarding interference between the Links that occurs to the other communication device. Obtain transmission parameters used for transmitting data signals, which are determined by the other communication device based on the first interference information and second interference information regarding interference between the Links that occurs in the other communication device. An information processing method.

Images