WO2022079992A1 - 端末、通信装置及び通信方法 - Google Patents
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/04—TPC
- H04W52/06—TPC algorithms
- H04W52/14—Separate analysis of uplink or downlink
- H04W52/146—Uplink power control
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/022—Site diversity; Macro-diversity
- H04B7/024—Co-operative use of antennas of several sites, e.g. in co-ordinated multipoint or co-operative multiple-input multiple-output [MIMO] systems
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/04—TPC
- H04W52/18—TPC being performed according to specific parameters
- H04W52/24—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters
- H04W52/242—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters taking into account path loss
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/04—TPC
- H04W52/18—TPC being performed according to specific parameters
- H04W52/24—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters
- H04W52/243—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters taking into account interferences
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W74/00—Wireless channel access
- H04W74/002—Transmission of channel access control information
- H04W74/006—Transmission of channel access control information in the downlink, i.e. towards the terminal
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W84/00—Network topologies
- H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
- H04W84/10—Small scale networks; Flat hierarchical networks
- H04W84/12—WLAN [Wireless Local Area Networks]
Definitions
- This disclosure relates to terminals, communication devices and communication methods.
- 802.11ax As a successor to the IEEE (the Institute of Electrical and Electronics Engineers) 802.11 standard 802.11ax (hereinafter referred to as “11ax”), 802.11be (hereinafter referred to as “11be”) technical specifications have been formulated. There is.
- IEEE 802.11-19 / 1102r0 A unified transmission procedure for multi-AP coordination, July 2019 IEEE 802.11-20 / 1040r1, Coordinated Spatial Reuse: Extension to Uplink, July 2020 IEEE P802.11ax / D6.0, November 2019
- the non-limiting examples of the present disclosure contribute to the provision of terminals, communication devices, and communication methods capable of improving the efficiency of transmission power control in uplink cooperative communication.
- the terminal includes a control circuit that determines the transmission power of the uplink based on a plurality of signals received from a plurality of sources that perform cooperative communication of the uplink, and the determined transmission. It is provided with a transmission circuit that performs uplink transmission by electric power.
- the efficiency of transmission power control in uplink cooperative communication can be improved.
- DL Downlink
- UL Uplink
- UL Uplink
- UL Uplink
- C-SR Coordinated spatial reuse
- MAC Medium Access Control
- PSR Trigger Type Parameterized spatial reuse
- STA Block diagram showing a partial configuration example of a terminal
- AP AccessPoint
- STA configuration Diagram showing an example of AP and STA placement
- DL communication communication from AP to STA
- UL communication communication from STA to AP
- the forms of cooperative communication include, for example, a form in which two APs cooperate to perform DL communication together (hereinafter referred to as "DL-DL communication”) and a form in which two APs cooperate to perform UL communication together (hereinafter referred to as "DL-DL communication”).
- DL-DL communication a form in which two APs cooperate to perform UL communication together
- DL-DL communication a form in which two APs cooperate to perform UL communication together
- UL-UL communication has been studied (see, for example, Non-Patent Document 1).
- FIG. 1 is a diagram showing an operation example of DL-DL communication.
- AP1 which is a master AP that controls cooperative communication, transmits a trigger frame (for example, Slave TF) instructing the start of cooperative communication to AP2 and AP3, which are slave APs. Then, AP1, AP2, and AP3 cooperate with each other to transmit downlink data Data1, Data2, and Data3, respectively.
- a trigger frame for example, Slave TF
- FIG. 2 is a diagram showing an operation example of UL-UL communication.
- AP1 which is a master AP transmits a trigger frame (for example, Slave TF) instructing the start of cooperative communication, as in FIG.
- AP1, AP2, and AP3 each transmit a trigger frame (for example, Basic TF) instructing uplink transmission.
- AP1, AP2, and AP3 cooperate with each other to receive uplink data Data1, Data2, and Data3, respectively.
- C-SR Coordinated spatial reuse
- FIG. 3 is a diagram showing an operation example of UL-UL communication.
- FIG. 3 illustrates an example of operation to which C-SR is applied (see, for example, Non-Patent Document 2).
- FIG. 3 shows, for example, operation examples of AP1, AP2, STA1-1, STA1-2, STA2-1, and STA2-2.
- STA1-1 and STA1-2 are STAs connected to AP1 (or also referred to as components of AP1's Basic Service Set (BSS)).
- STA2-1 and STA2-2 are STAs (or BSS components of AP2) connected to AP2.
- AP1 and AP2 may be included in a cooperative set (for example, APcandidateset) which is a group of AP candidates that perform cooperative communication.
- BSS Basic Service Set
- Associate the operation of STA connecting to AP in BSS.
- AP1 for example, called Master AP or Sharing AP
- AP1 that controls cooperative communication.
- AP1 for example, called Master AP or Sharing AP
- the path loss between STA and AP (between STA and AP) included in the cooperative set (AP candidate set) is the Slave AP (or Slave AP) whose cooperative communication is controlled.
- Shared AP may notify AP1 which is a Master AP (or Sharing AP).
- AP1 transmits a C-SR announcement (C-SR-A) frame to AP2.
- C-SR-A C-SR announcement
- AP1 and AP2 each transmit a trigger frame (Trigger frame) to the associated STA. Then, AP1 and AP2 cooperate to receive uplink data from STA1-1, STA1-2, STA2-1, and STA2-2, respectively.
- Trigger frame Trigger frame
- a trigger frame for notifying the transmission control information and the transmission timing to the STA is transmitted and received.
- Slave TF, Basic TF shown in FIGS. 1 and 2, and C-SR-A shown in FIG. 3 are one of the trigger frames.
- FIG. 4 is a diagram showing an example of the type of Medium Access Control (MAC) frame in 11ax.
- FIG. 4 shows the changes in the values changed in 11ax.
- the contents shown in FIG. 4 are the contents shown in Table 9-1 of Non-Patent Document 3.
- the trigger frame instructing UL communication in 11ax is a field containing common information addressed to the STA to be triggered (hereinafter referred to as "Common info field”) and a field containing information addressed to individual STAs (hereinafter referred to as “Common info field”).
- Common info field a field containing common information addressed to the STA to be triggered
- Common info field a field containing information addressed to individual STAs
- Common info field hereinafter referred to as "Common info field”
- User info field a field containing information addressed to individual STAs
- FIG. 5 is a diagram showing an example of the format of Common info field.
- the format shown in FIG. 5 is, for example, the same as the format shown in Figure 9-64b of Non-Patent Document 3.
- FIG. 5 shows a plurality of subfields included in the Common info field format.
- the Common info field includes, for example, APTXPower (information indicating the transmission power value from the AP to the STA) as information related to transmission power control.
- FIG. 6 is a diagram showing an example of the format of User info field.
- the format shown in FIG. 6 is the same as the format shown in Figure 9-64d of Non-Patent Document 3.
- FIG. 6 shows a plurality of subfields included in the User info field format.
- the User info field includes, for example, UL Target RSSI (information regarding the target received signal strength of the AP in the uplink; also referred to as UL Target Receive Power) as information related to transmission power control.
- UL Target RSSI information regarding the target received signal strength of the AP in the uplink; also referred to as UL Target Receive Power
- FIG. 7 shows an example of the value included in the subfield (hereinafter, simply referred to as Trigger Type) indicated as “Trigger Type” of Common info field.
- Trigger Type the value included in the subfield indicated as “Trigger Type” of Common info field.
- the table shown in FIG. 7 is, for example, the same as Table 9-31b of Non-Patent Document 3.
- FIG. 8 is a diagram showing an operation example of PSR-based spatial reuse.
- the content shown in FIG. 8 is the content shown in Figure 26-13 of Non-Patent Document 3.
- a certain AP may transmit a Trigger frame PSR Reception Physical layer convergence protocol Data Unit (PSRR PPDU).
- PSRR PPDU Trigger frame PSR Reception Physical layer convergence protocol Data Unit
- the Common Info field in the PSRR PPDU (eg, a field common to multiple STAs) may contain the value specified by UL spatial reuse.
- the STA different from the STA under BSS is a value specified by UL spatial reuse included in PSRR PPDU, and
- the uplink transmission power may be calculated based on the path loss measured using the PSRR PPDU.
- the STA under OBSS may transmit an uplink signal (for example, PSR Transmission PPDU (PSRT PPDU)) based on the calculated transmission power.
- PSRT PPDU PSR Transmission PPDU
- the STA associated with the AP (for example, STA under BSS or also referred to as BSS STA) is based on the information regarding the uplink transmission power specified by the PSRR PPDU which is the Trigger frame.
- An uplink signal (for example, High Efficiency Trigger-based PPDU (HE TB PPDU)) may be transmitted.
- HE TB PPDU High Efficiency Trigger-based PPDU
- transmission power control in UL-UL communication has not been sufficiently studied.
- AP1 which is the master AP
- the amount of information in the communication between APs can be increased.
- the wireless communication system includes at least two APs and one STA.
- FIG. 9 is a block diagram showing a partial configuration example of STA10.
- the STA 10 shown in FIG. 9 includes a control unit 11 and a transmission unit 12.
- the control unit 11 (for example, corresponding to a control circuit) receives an uplink transmission power based on a plurality of signals (for example, Trigger frame) received from a plurality of sources (for example, AP) that perform uplink cooperative communication. To decide.
- the transmission unit 12 (corresponding to, for example, a transmission circuit) performs uplink transmission with the determined transmission power.
- FIG. 10 is a block diagram showing an example of the AP according to the present embodiment.
- the AP 100 shown in FIG. 10 has a transmission packet generation unit 101, a radio transmission / reception unit 102, a reception packet decoding unit 103, and a control signal generation unit 104.
- the transmission packet generation unit 101 generates a transmission packet from, for example, transmission data from a processing unit of an upper layer (not shown) and data generated by the control signal generation unit 104 (for example, control information), and wirelessly generates the generated packet. It is output to the transmission / reception unit 102.
- the wireless transmission / reception unit 102 converts the transmission packet input from the transmission packet generation unit 101 into a wireless transmission signal, and transmits the wireless transmission signal via the antenna.
- the wireless transmission / reception unit 102 receives the wireless reception signal, converts the wireless reception signal into a reception packet, and outputs the reception packet to the reception packet decoding unit 103.
- the received packet decoding unit 103 decodes the received packet and outputs the received data input from the wireless transmission / reception unit 102 to a processing unit of a higher layer (not shown). Alternatively, the received packet decoding unit 103 decodes the received packet and outputs the control information to the control signal generation unit 104.
- the control signal generation unit 104 generates control information based on the transmission data, the control information input from the reception packet decoding unit 103, and at least one of the internal states, and the generated control information is transmitted to the transmission packet generation unit 101. Output to.
- the control signal generation unit 104 may generate control information regarding triggers, associations, or data communications.
- FIG. 11 is a block diagram showing an example of STA according to the present embodiment.
- the STA 200 shown in FIG. 11 has a transmission packet generation unit 201, a radio transmission / reception unit 202, a reception packet decoding unit 203, a path loss measurement unit 204, a control signal generation unit 205, and a transmission power control unit 206.
- control unit 11 shown in FIG. 9 includes at least one of the transmission packet generation unit 201, the reception packet decoding unit 203, the path loss measurement unit 204, the control signal generation unit 205, and the transmission power control unit 206 shown in FIG. May include.
- the transmission unit 12 shown in FIG. 9 may include the radio transmission / reception unit 202 shown in FIG.
- the transmission packet generation unit 201 generates a transmission packet from, for example, transmission data from a processing unit of an upper layer (not shown) and data generated by the control signal generation unit 205 (for example, control information), and wirelessly generates the generated packet. Output to the transmitter / receiver 202.
- the wireless transmission / reception unit 202 converts the transmission packet input from the transmission packet generation unit 201 into a wireless transmission signal, and transmits the wireless transmission signal via the antenna.
- the wireless transmission / reception unit 202 receives the wireless reception signal, converts the wireless reception signal into a reception packet, and outputs the reception packet to the reception packet decoding unit 203 and the path loss measurement unit 204.
- the received packet decoding unit 203 decodes the received packet and outputs the received data input from the wireless transmission / reception unit 202 to a processing unit of a higher layer (not shown). Alternatively, the received packet decoding unit 203 decodes the received packet and outputs the control information to the path loss measuring unit 204, the control signal generation unit 205, and the transmission power control unit 206.
- the path loss measuring unit 204 is based on, for example, the received power measurement value of the received packet input from the wireless transmission / reception unit 202 and the transmission power of the AP100 included in the control information input from the received packet decoding unit 203.
- the path loss between the AP100 and the STA200 is measured, and information about the path loss is output to the control signal generation unit 205 and the transmission power control unit 206.
- the control signal generation unit 205 generates control information based on transmission data, control information input from the received packet decoding unit 203, information on path loss input from the path loss measurement unit 204, and at least one of the internal states. Then, the generated control information is output to the transmission packet generation unit 201.
- the transmission power control unit 206 is an uplink in the wireless transmission / reception unit 202 based on the information on the transmission power included in the control information input from the received packet decoding unit 203 and the information on the path loss input from the path loss measurement unit 204. Controls the transmission power of.
- FIG. 12 is a diagram showing an example of UL-UL communication that cooperates based on the C-SR method.
- FIG. 12 shows, for example, a set (cooperative set) including AP1, AP2, STA1, and STA2.
- STA1 exists within the coverage area of AP1 and associates with AP1.
- STA2 exists within the coverage area of AP2 and associates with AP2.
- the associated AP of STA1 is AP1 and the associated AP of STA2 is AP2.
- UL communication from STA1 to AP1 and UL communication from STA2 to AP2 are coordinated by the C-SR method.
- AP1 is an AP (for example, Master AP or Sharing AP) that is arranged in the cooperative set and controls the cooperative set (or cooperative communication).
- AP2 is an AP (eg, Slave AP or Shared AP) that is placed in the cooperative set and controlled by the Master AP.
- STA1 is present at a position where it is highly possible that it cannot receive the packet from AP2 while it can receive the packet from AP1. In this case, in STA1, the received power of the packet from AP2 tends to be low.
- STA2 exists at a position where packets from both AP1 and AP2 can be received, for example.
- the received power of the packet from AP1 tends to be high.
- UL-UL communication may be executed in the cooperative set after the initial setting of the cooperative set shown in FIG. 12 and after STA1 associates with AP1 and STA2 associates with AP2.
- FIG. 13 is a diagram showing an example of a UL-UL communication sequence in the cooperative set shown in FIG.
- AP1 and AP2 transmit, for example, a beacon.
- the beacon may be transmitted, for example, at regular intervals. Further, the beacon may contain, for example, information regarding the transmission power value of each of AP1 and AP2.
- STA1 and STA2 After receiving the beacon from each AP, STA1 and STA2 measure the path loss between STA and AP based on the transmission power value of the AP included in the beacon and the received power measured using the beacon. It's okay.
- STA1 notifies AP1, which is an associated AP, of a Report packet containing information on the measured path loss, for example.
- STA2 notifies AP2, which is an associated AP, of a Report packet containing information on the measured path loss, for example.
- STA2 may notify AP2 of the path loss between STA2-AP1 and the path loss between STA2-AP2 by a Report packet.
- AP1 specifies the frequency band received by AP2 for AP2 by, for example, the Multi-AP Trigger frame (MAPTF) instructing the start of cooperative transmission.
- MAPTF Multi-AP Trigger frame
- AP2 calculates the transmission power value (UL transmission power) of STA2 based on, for example, the path loss between STA2-AP1 and the path loss between STA2-AP2 included in the Report packet from STA2. AP2 notifies STA2 of a Trigger frame containing information on the calculated transmission power value of STA2, for example.
- STA2 transmits a DATA packet, for example, based on the transmission power value specified by the Trigger frame from AP2.
- the transmission power value of STA2 is calculated by AP2, which is an associated AP of STA2.
- the path loss value used for calculating the transmission power value of STA2 is measured based on the beacon from each AP100 (for example, AP1 and AP2) received by STA2 and transmitted to AP2 which is an associated AP of STA2. Will be done. In other words, the path loss value measured by STA2 does not have to be sent to AP1 which is not STA2's associated AP.
- AP2 which is a Shared AP in cooperative communication, does not have to notify AP1, which is a Sharing AP, of path loss related to STA2 (for example, path loss between STA2-AP1 and path loss between STA2-AP2). ..
- the amount of information in the communication between APs can be reduced in the transmission power control of UL communication, so that the efficiency of transmission power control in cooperative communication can be improved.
- AP1 has a transmission power value (UL transmission power value) of STA1 based on information on path loss included in the Report packet from STA1 (for example, path loss between STA1-AP1 and path loss between STA1-AP2). ), And notify STA1 of the Trigger frame containing the calculated transmission power value of STA2.
- the STA1 may transmit a DATA packet, for example, based on the transmission power value specified by the Trigger frame from AP1.
- the STA200 may spontaneously transmit, for example, a Report packet.
- the STA200 may send a Report packet based on the latest beacon.
- the STA 200 may respond (eg, send a Report packet) to the Report packet request of the AP100, for example.
- the STA200 may transmit, for example, a set of an identifier of the AP100 (for example, AP-ID) and a path loss value corresponding to the AP100, and the Report of the AP100.
- the path loss value with and from the AP100 corresponding to the AP-ID specified in the packet request may be transmitted in the Report packet.
- the signal used for the measurement of the path loss is not limited to the beacon, for example, a null data packet (NDP: NullDataPacket). ) May be.
- NDP NullDataPacket
- the STA 200 may notify the AP 100 of the received power, and the AP 100 may calculate the path loss in the STA 200 based on the notified received power.
- the path loss between the AP100 and the STA200 may be set to the maximum value of the path loss or the minimum value of the received power and notified to the associated AP. good.
- the transmission power value is notified from AP2 to STA2 by the Trigger frame
- the information notified by the Trigger frame is not limited to the transmission power value.
- AP2 notifies (or specifies) a value obtained by subtracting the path loss between STA2-AP2 from the calculated transmission power value (hereinafter, referred to as, for example, Expected receive power) to STA2. You may.
- STA2 can handle the expected received power in the same way as UL Target RSSI in FIG. 6 to determine the transmission power.
- STA2 determines the path loss between AP2-STA2 based on the transmission power information of AP2 (corresponding to APTXPower in FIG.
- the Trigger frame included in the Trigger frame transmitted from AP2 and the received power of Trigger frame in STA2.
- the transmission power can be determined from the calculated path loss and the expected received power. Therefore, when notifying the expected received power using the Trigger frame format of FIG. 6, it is preferable to set the value of the expected received power in the UL Target RSSI field.
- the UL Target RSSI field may be diverted to, for example, UL Expected Receive Power field to indicate the expected received power. This makes it possible to use the Trigger frame in the format shown in FIG. 6 for both cooperative communication and communication different from cooperative notification without adding a field.
- AP1 may specify the transmission power of STA1 as a preset (or limited) value.
- the Sharing AP may notify the Shared AP (for example, AP2 in FIG. 13) of the allowable interference power (also referred to as Acceptable Maximum Interference Level) by MAPTF.
- the Shared AP may set the transmission power of the STA200, for example, based on the notified allowable interference power.
- the Shared AP can set the transmission power of the STA 200 associated with the Shared AP in consideration of the interference with the Sharing AP, so that the accuracy of the transmission power control can be improved.
- FIG. 14 is a diagram showing an example of a format in which a field of allowable interference power is added to the Common info field of MAPTF.
- the Sharing AP notifies the Shared AP of one allowable interference power by the MAPTF. Therefore, for example, when the setting for a plurality of STA200s is specified by the Trigger frame following the MAPTF, the allowable interference power specified by the MAPTF is the value of any one of the allowable interference powers for the STA200 (for example,). , Minimum value).
- the allowable interference power may be notified in the User info field of MAPTF.
- the permissible interference power may be individually specified for the AP100, individually for the frequency band, or individually for the STA200.
- FIG. 15 is a diagram showing an example of a format in which the allowable interference power is individually specified for the AP100 or the frequency band.
- "AP-ID" shown in FIG. 15 is an identifier that specifies AP100.
- the AP-ID may be included in AID12, which is the identifier of STA200 shown in FIG. 6, and AP-ID may be used instead of AID12.
- FIG. 16 is a diagram showing an example of a format in which the allowable interference power is individually specified for the STA 200.
- the information regarding the allowable interference power may be included in the STA info field (information field individual to the STA) in the User info field.
- the AP100 determines the transmission power of the STA200 based on the path loss measured in the STA200.
- the STA 200 determines the transmission power based on the path loss.
- UL- is coordinated based on the C-SR method by AP100 (for example, AP1 and AP2) and STA200 (for example, STA1 and STA2) shown in FIG.
- AP100 for example, AP1 and AP2
- STA200 for example, STA1 and STA2
- An example of UL communication will be described.
- FIG. 17 is a diagram showing an example of a UL-UL communication sequence in the cooperative set shown in FIG.
- AP1 which is a Sharing AP specifies a frequency band received by AP2 with respect to AP2 which is a Shared AP, for example, by MAPTF.
- the MAP TF may include, for example, the UL spatial reuse information shown in FIG. 5, or the allowable interference power described in the first embodiment.
- STA1 and STA2 can also receive MAPTF.
- AP1 and AP2 transmit, for example, a Trigger frame containing information on transmission power control to STA1 and STA2.
- Information related to transmission power control includes, for example, APTXPower (information indicating the transmission power value from AP to STA) shown in FIG. 5 and UL Target RSSI (target reception signal strength of AP100 in the uplink) shown in FIG. Information about) may be included.
- Transmission power candidates (hereinafter referred to as "TxPowerOBSS") may be calculated.
- STA2 may calculate transmission power candidates based on MAPTF by the same processing as PSR-based spatial reuse shown in FIG.
- STA2 may calculate the uplink transmission power candidate TxPowerOBSS based on the value specified by UL spatial reuse included in MAPTF and the path loss measured using MAPTF.
- Transmission power candidates may be calculated based on the received power (for example, referred to as "RxPower") measured using the Trigger frame (including Power and UL Target RSSI). ..
- RxPower Transmission power candidate
- STA2 may calculate the transmission power candidate TxPowerBSS according to the following equation (1). For example, (AP TX power --RxPower) in Eq. (1) corresponds to the path loss between STA2-AP2.
- TxPowerBSS (AP TX Power --RxPower) + UL Target RSSI (1)
- the STA200 transfers the uplink transmission power based on the plurality of signals (for example, MAPTF and Triggerframe) received from the plurality of sources (for example, AP1 and AP2) that perform the uplink cooperative communication. It is determined, and uplink transmission is performed using the determined transmission power.
- the plurality of signals for example, MAPTF and Triggerframe
- the plurality of sources for example, AP1 and AP2
- the transmission power value of STA2 is calculated by STA2. Further, for example, the path loss value used for calculating the transmission power value of STA2 is measured based on the trigger frame transmitted from a plurality of AP100s (for example, AP1 and AP2) received by STA2. Thus, for example, the path loss value measured by STA2 does not have to be transmitted to AP100 (eg AP1 and AP2).
- AP100 eg AP1 and AP2
- AP2 which is a Shared AP has a path loss related to STA2 (for example, a path loss between STA2-AP1) with respect to AP1 which is a Sharing AP.
- path loss between STA2-AP2 does not have to be notified.
- STA2 does not have to notify AP2 of the path loss related to STA2.
- the amount of information in the communication between APs can be reduced in the transmission power control of UL communication, so that the efficiency of transmission power control in cooperative communication can be improved.
- the STA200 receives a packet (for example, the timing immediately before) closer to the transmission timing of the DATA packet (for example, in FIG. 17, the MAP from AP1).
- the transmission power is set using the path loss measured based on TF and Trigger frame from AP2. By setting the transmission power, the period from the path loss measurement to the packet transmission becomes shorter, so that it becomes easier to follow the fluctuation of the path loss due to, for example, the movement of the shield or the STA200, and the accuracy of the transmission power control can be improved.
- TxPowerBSS is a transmission power value set based on the path loss between STA2 and AP2, which is an associated AP of STA2, and the parameter notified by the Trigger frame from AP2.
- TxPowerBSS is a transmission power value (for example, a desired transmission power value) expected for communication between STA2-AP2.
- TxPowerOBSS is, for example, a transmission power value set based on UL spatial reuse included in MAPTF from AP1 different from STA2's associated AP.
- the parameters specified by UL spatial reuse may include values for permissible interference power.
- TxPowerOBSS is, for example, the transmit power acceptable for UL transmission in STA2.
- the signal transmitted by STA2 with a transmit power exceeding TxPowerOBSS can interfere with AP1.
- the STA2 can set the transmission power of the uplink with TxPowerOBSS as the upper limit, for example, so that the accuracy of the transmission power control in the uplink can be improved.
- the STA200 existing at a position where packets from a plurality of AP100s can be received is an uplink that suppresses interference with a plurality of AP100s performing cooperative communication based on the received packets from each of the plurality of AP100s. Transmission power control can be performed appropriately.
- STA2 may set, for example, TxPowerBSS as the transmission power of the DATA packet. If STA2 does not receive MAPTF, the path loss based on MAPTF, for example, the path loss between STA2-AP1 is expected to be larger than when STA2 receives MAPTF, so the transmission power of STA2. Is set to TxPowerBSS, but it is expected that the effect of interference from STA2 uplink transmission on AP1 will be small.
- the STA200 existing at a position where a packet from a part of the AP100 (for example, associated AP) can be received among the plurality of AP100s performing cooperative communication is based on the packet from the part of the AP100. It is possible to appropriately control the transmission power of the uplink in consideration of the AP100 that performs the uplink communication.
- STA1 may set a transmission power (for example, a value similar to TxPowerBSS) based on the Trigger frame from AP1.
- a transmission power for example, a value similar to TxPowerBSS
- STA2 calculates TxPowerOBSS when MAPTF from AP1 (for example, OBSS) is received. In other words, STA2 does not have to calculate TxPowerOBSS if it does not receive MAPTF from AP1 (eg OBSS). Therefore, for example, the STA 200 may receive the allowable interference power (also referred to as Acceptable Maximum Interference Level) notified by the MAP TF from the Sharing AP (for example, AP1 in FIG. 17). Information on the allowable interference power may be included in the Common info field of the MAP TF (or Trigger frame) as shown in FIG. 14, and the MAP TF (or Trigger frame) as shown in FIG. It may be included in the User info field of, and as shown in FIG. 16, it may be included in the STA info field in the User info field.
- allowable interference power also referred to as Acceptable Maximum Interference Level
- the transmission power of the STA2 may be set based on the allowable interference power included in the MAPTF.
- the transmission power control using the allowable interference power for example, the Shared AP can set the transmission power of the STA 200 associated with the Shared AP in consideration of the interference with the Sharing AP, so that the accuracy of the transmission power control can be improved.
- the method of calculating the transmission power candidate TxPowerBSS based on the Trigger frame from the associated AP is not limited to the method based on the equation (1), and may be another method. Further, in STA200, the method of calculating the transmission power candidate TxPowerOBSS based on the Trigger frame (for example, MAPTF) from the AP different from the associated AP is not limited to the method based on PSR-based spatial reuse, for example, and other methods can be used. good. For example, the calculation methods of TxPowerBSS and TxPowerOBSS may be common or different.
- the cooperative communication by two AP100s has been described, but the number of AP100s that perform cooperative communication may be three or more. In this embodiment, a case where the number of AP100s is three will be described as an example.
- FIG. 18 is a diagram showing an example of UL-UL communication that cooperates based on the C-SR method.
- FIG. 18 shows, for example, a set (cooperative set) including AP1, AP2, AP3, STA1, STA2, and STA3.
- STA1 exists within the coverage area of AP1 and associates with AP1.
- STA2 exists within the coverage area of AP2 and associates with AP2.
- STA3 exists within the coverage area of AP3 and associates with AP3.
- the associated AP of STA1 is AP1
- the associated AP of STA2 is AP2
- the associated AP of STA3 is AP3.
- UL communication from STA1 to AP1, UL communication from STA2 to AP2, and UL communication from STA3 to AP3 are coordinated by the C-SR method.
- AP1 is an AP (for example, referred to as Master AP or Sharing AP) that is arranged in the cooperative set and controls the cooperative set (or cooperative communication).
- AP2 and AP3 are APs (for example, called Slave AP or Shared AP) that are arranged in the cooperative set and controlled by the Master AP.
- FIG. 18 shows an example of coordinated transmission including a plurality of Shared APs (or Slave APs).
- the lower the transmission power of STA2 and STA3 is set (in other words, the limitation), the less the influence of interference from STA2 and STA3 on AP1 can be reduced.
- the lower the transmission power of STA1 and STA3 is set (in other words, limited), the less the influence of interference from STA1 and STA3 on AP2 can be reduced.
- AP3 exists at a position that is not easily affected by interference from STA1 and STA2.
- STA1 is present at a position where, for example, it is possible to receive a packet from AP1, but it is highly likely that it will not receive a packet from AP2 or AP3. In this case, in STA1, the received power of the packet from AP2 or AP3 tends to be low.
- STA2 exists at a position where packets from both AP1 and AP2 can be received, for example. In this case, in STA2, the received power of the packet from AP1 tends to be high. Further, in FIG. 18, STA3 exists at a position where, for example, each packet of AP1, AP2, and AP3 can be received. In this case, in STA3, the received power of packets from AP1 and AP2 tends to be high.
- UL-UL communication may be executed in the cooperative set after the initial setting of the cooperative set shown in FIG. 18, and after STA1 associates with AP1, STA2 associates with AP2, and STA3 associates with AP3.
- FIG. 19 is a diagram showing an example of a UL-UL communication sequence in the cooperative set shown in FIG.
- AP1 which is a Sharing AP specifies a frequency band which each of AP2 and AP3 receives for AP2 and AP3 which are Shared APs by MAPTF, for example, as in the second embodiment.
- the MAP TF may include, for example, the UL spatial reuse information shown in FIG. 5, or the allowable interference power described in the first embodiment.
- STA1, STA2 and STA3 can also receive MAPTF.
- AP1 and AP2 transmit a Trigger frame containing information on transmission power control to STA1 and STA2, for example, as in the second embodiment.
- the information related to the transmission power control includes, for example, APTXPower (information indicating the transmission power value from the AP to the STA) shown in FIG. 5 and UL Target RSSI (uplink link) shown in FIG. 6, as in the second embodiment.
- APTXPower information indicating the transmission power value from the AP to the STA
- UL Target RSSI uplink link
- STA1 and STA2 may set the transmission power by, for example, the same operation as in the second embodiment.
- the AP3 transmits the Trigger frame to the STA3 at a transmission timing different from the transmission timing of the Trigger frame of the AP2, for example.
- AP3 may transmit a Trigger frame after a certain interval (for example, Short Inter Frame Space (SIFS)) from the Trigger frame of AP2.
- SIFS Short Inter Frame Space
- the packet length of the Trigger frame of AP2 (referred to as TriggerLength) is notified by MAPTF, and AP3 may transmit the Triggerframe after (SIFS + TriggerLength + SIFS) from MAPTF.
- the resources in the time domain of the Trigger frame transmitted from multiple Shared APs may be different from each other.
- TxPowerOBSS1 transmission power candidate
- STA3 may measure path loss using, for example, MAPTF and calculate TxPowerOBSS1 based on the measured path loss and the value specified by UL spatial reuse.
- the STA3 may calculate the transmission power candidate based on the MAP TF by the same processing as the PSR-based spatial reuse shown in FIG.
- TxPowerOBSS2 a transmission power candidate based on the Trigger frame.
- the STA3 may measure the path loss using, for example, a Trigger frame, and calculate TxPowerOBSS2 based on the measured path loss and the value specified by UL spatial reuse. For example, the STA3 may calculate the transmission power candidate based on the Trigger frame from the AP2 different from the associated AP by the same processing as the PSR-based spatial reuse shown in FIG.
- TxPowerBSS transmission power candidate
- STA3 is, for example, information on transmission power control included in the Trigger frame (including, for example, APTXPower and ULTargetRSSI), and received power measured using the Triggerframe (for example, referred to as "RxPower"). Based on this, TxPowerBSS may be calculated. For example, STA3 may calculate the transmission power candidate TxPowerBSS according to the above-mentioned equation (1).
- TxPow transmission power of the uplink signal (for example, DATA packet) according to the following equation (3) based on a plurality of transmission power candidates TxPowerOBSS1, TxPowerOBSS2 and TxPowerBSS. It's okay.
- TxPow min (TxPowerOBSS1, TxPowerOBSS2, TxPowerBSS) (3)
- the STA200 transmits the uplink based on the plurality of signals (for example, MAPTF and Trigger frame) received from the plurality of sources (for example, AP1, AP2 and AP3) that perform the uplink cooperative communication.
- the power is determined, and uplink transmission is performed using the determined transmission power.
- the transmission power value of STA3 is calculated by STA3.
- the path loss value used for calculating the transmission power value of STA3 is measured based on the trigger frame transmitted from a plurality of AP100s (for example, AP1, AP2 and AP3) received by STA3.
- AP100s for example, AP1, AP2 and AP3
- the path loss value measured by STA3 does not have to be transmitted to AP100 (eg, AP1, AP2 and AP3).
- AP2 and AP3 which are Shared APs (for example, AP100 different from the AP that controls cooperative communication), do not notify AP1, which is a Sharing AP, of the path loss related to STA2 and STA3. good.
- STA2 and STA3 do not have to notify AP2 and AP3 of the path loss related to STA2 and STA3.
- the amount of information in the communication between APs can be reduced in the transmission power control of UL communication, so that the efficiency of transmission power control in cooperative communication can be improved even when the number of APs is 3 or more. ..
- STA3 may perform transmission power control based on TxPowerOBSS1 and TxPowerBSS (for example, the same operation as STA2 shown in FIG. 17 of the second embodiment). Further, for example, when STA3 does not receive MAPTF of AP1, STA3 may perform transmission power control based on TxPowerOBSS2 and TxPowerBSS. Further, for example, in FIG. 19, when STA3 does not receive the MAPTF from AP1 and the Trigger frame from AP2, STA3 may set, for example, TxPowerBSS as the transmission power of the DATA packet.
- the transmission order of the Trigger frame in the Shared AP may be the order specified by the User info field of the MAP TF.
- the transmission order of the Trigger frame shown in FIG. 19 may be set.
- the Trigger frames of AP2 and AP3 are transmitted at different timings (in other words, resources in different time domains)
- the Trigger frames of AP2 and AP3 are different resources in a certain domain. It may be sent.
- the Trigger frames of AP2 and AP3 may be transmitted in different frequency bands (resources in different frequency domains).
- the time resources (or timings) at which the Trigger frames of AP2 and AP3 are transmitted may be the same or different. This allows STA3 to measure the path loss between STA3-AP2, for example, based on the Trigger frame from AP2.
- the number of Shared APs may be three or more.
- the resources to which the Trigger frame of three or more Shared APs are transmitted may be different from each other in at least one of the time domain and the frequency domain, for example.
- the STA200 can measure the path loss between each Shared AP, for example, based on the Trigger frame from a plurality of Shared APs.
- the allocated frequency band of the Trigger frame of AP3 may be different from the allocated frequency band of DATA of STA1 and STA2.
- the allocated frequency band of DATA of STA1 and STA2 may be different from the allocated frequency band of DATA of STA1 and STA2.
- the transmission power of the Trigger frame of AP3 may be controlled based on the bus loss between AP1 and AP3 by MAPTF and the bus loss between AP2 and AP3 by the Trigger frame transmitted by AP2. ..
- This transmission power control enables transmission power control that suppresses interference of AP1 and AP2 with DATA reception for the Trigger frame of AP3.
- STA3 calculates TxPowerOBSS1 when MAPTF from AP1 (for example, OBSS) is received. In other words, STA3 does not have to calculate TxPowerOBSS1 if it does not receive MAPTF from AP1 (eg OBSS). Therefore, for example, the STA 200 may receive the allowable interference power (also referred to as Acceptable Maximum Interference Level) notified by the MAP TF from the Sharing AP (for example, AP1 in FIG. 19). Information on the allowable interference power may be included in the Common info field of the MAP TF (or Trigger frame) as shown in FIG. 14, and the MAP TF (or Trigger frame) as shown in FIG. It may be included in the User info field of, and as shown in FIG. 16, it may be included in the STA info field in the User info field.
- allowable interference power also referred to as Acceptable Maximum Interference Level
- TxPowerSelect information regarding the validity and invalidity of the transmission power control operation based on a plurality of signals (for example, referred to as "TXPowerSelect") may be notified to the STA200 by the Trigger frame.
- TxPowerSelect may be instructed by Reserved (B63) of Commoninfofield shown in FIG.
- TXPowerSelect may be based on, for example, path loss.
- the STA200 enables and disables transmission power control based on a plurality of signals based on the received packet type (for example, Trigger Type of Common info field shown in FIG. 5) instead of TXPowerSelect. You may judge. For example, when the STA200 receives a packet whose Trigger Type is MAP TF from an AP different from the associated AP, the transmission power based on a plurality of signals in the TXOP period specified in the UL Length or MAP TF preamble shown in FIG. Control may be enabled. Thereby, the operation period of the transmission power control based on a plurality of signals can be set (or limited).
- the format of the Common info field of MAP TF may be the format shown in FIG. 20 instead of the format shown in FIG.
- the format of the User info field of MAP TF may be the format shown in FIG. 21 instead of the format shown in FIG.
- the information regarding the Trigger frame shown in FIG. 22 may be set instead of the information regarding the Trigger Type shown in FIG. 7 (for example, a table). ..
- Trigger Type Multi-AP is added as compared with FIG. 7.
- the UL / DL Flag shown in FIG. 20 may be added to the Trigger Dependent Common Info shown in FIG.
- the AID 12 shown in FIG. 6 may be changed to the AP ID shown in FIG. 21 (for example, an identifier indicating the notification destination Shared AP).
- MAPType and MAPTypeDependentInfo are assigned to values that are unused during C-SR in MAPTF shown in FIG. 6 (for example, ULHE-MCS, etc.) or TriggerDependentUserInfo. good.
- the format of MAPTF may be different from the format of Triggerframe.
- FIG. 23 is a diagram showing an example of the format of the MAP Trigger frame.
- the fact that the frame type is "MAP Trigger” may be specified by, for example, "Type” and "Subtype” included in the "Frame Control" field.
- FIG. 24 is a diagram showing an example of the type of MAC frame specified by Type and Subtype.
- FIG. 24 is a table in which "MAP Trigger" is added to the type of MAC frame shown in FIG. 4, for example.
- the "Common Info” field may indicate common information among the Shared APs that communicate with each other, and the "Per AP info” field may indicate individual information to the Shared APs that communicate with each other.
- “Length” may indicate the DATA transmission / reception period including Ack transmission / reception of Sharing AP
- BW may indicate the frequency band transmitted / received by Sharing AP and Shared AP
- “TX Power” may indicate the transmission power value of MAPTF
- "UL / DL Flag” may indicate a flag indicating the transmission direction (UL communication or DL communication) of DATA of Sharing AP.
- the “AP ID” may indicate an identifier indicating the notification destination Shared AP, and the “Resource Allocation” can use the corresponding Shared AP.
- the frequency band may be indicated, "MAPType” may indicate a cooperative method, and "MAPTypeDependentInfo” may indicate information corresponding to the cooperative method indicated by MAPType.
- MAPType examples include C-SR, Joint Transmissions (JT), Coordinated Beamforming (CBF), and Coordinated Orthogonal Frequency Division Multiple Access (C-OFDMA).
- JT Joint Transmissions
- CBF Coordinated Beamforming
- C-OFDMA Coordinated Orthogonal Frequency Division Multiple Access
- APTypeDependentInfo may be set to the allowable interference power described in the first embodiment when UL / DLFlag is UL communication, and UL / DL may be set.
- Flag is DL communication
- the maximum transmission power of Shared AP may be set.
- the allowable interference power and the maximum are not limited to this. It may be in a format that notifies both transmission power.
- MAPTypeDependentInfo when MAPType indicates C-OFDMA may be set without information.
- the validity and invalidity of the transmission power control based on the plurality of transmission power candidates described in the second embodiment and the third embodiment may be switched based on the MAP Type.
- the MAP Type is C-SR
- the operation of the transmission power control based on multiple transmission power candidates is enabled
- the MAP Type is different from the C-SR
- the transmission power based on multiple transmission power candidates is set.
- the control operation may be disabled.
- the present invention is not limited to this, and the allowable interference power (for example, "maximum transmission power-" The path loss between the Shared AP and the Shared AP ") may be notified.
- the STA200 may associate with a plurality of AP100s.
- the STA200 notifies the plurality of associated APs of the path loss based on the signals from the plurality of APs 100 including the plurality of associated APs, and the plurality of associated APs control the transmission power of the STA200. You may.
- the STA 200 may control the uplink transmission power based on the signals from the plurality of APs 100 including the plurality of associated APs.
- the present disclosure is not limited to this.
- the sources of the plurality of signals used for the transmission power control of the STA in the second and third embodiments are not limited to the AP.
- some of the plurality of APs may be replaced with STA.
- the present disclosure may be applied when one or more APs and one or more STAs perform cooperative communication with another STA.
- the present disclosure may be applied when two or more STAs perform cooperative communication with another STA.
- each signal (each packet) in the above-described embodiment is an example, and the present disclosure is not limited to this.
- Each functional block used in the description of the above embodiment is partially or wholly realized as an LSI which is an integrated circuit, and each process described in the above embodiment is partially or wholly. It may be controlled by one LSI or a combination of LSIs.
- the LSI may be composed of individual chips, or may be composed of one chip so as to include a part or all of functional blocks.
- the LSI may include data input and output.
- LSIs may be referred to as ICs, system LSIs, super LSIs, and ultra LSIs depending on the degree of integration.
- the method of making an integrated circuit is not limited to LSI, and may be realized by a dedicated circuit, a general-purpose processor, or a dedicated processor. Further, an FPGA (Field Programmable Gate Array) that can be programmed after the LSI is manufactured, or a reconfigurable processor that can reconfigure the connection and settings of the circuit cells inside the LSI may be used.
- FPGA Field Programmable Gate Array
- the present disclosure may be realized as digital processing or analog processing.
- the communication device may include a wireless transceiver and a processing / control circuit.
- the wireless transceiver may include a receiver and a transmitter, or them as a function.
- the radio transceiver (transmitter, receiver) may include an RF (Radio Frequency) module and one or more antennas.
- the RF module may include an amplifier, an RF modulator / demodulator, or the like.
- Non-limiting examples of communication devices include telephones (mobile phones, smartphones, etc.), tablets, personal computers (PCs) (laptops, desktops, notebooks, etc.), cameras (digital stills / video cameras, etc.).
- Digital players digital audio / video players, etc.
- wearable devices wearable cameras, smart watches, tracking devices, etc.
- game consoles digital book readers
- telehealth telemedicines remote health Care / medicine prescription
- vehicles with communication functions or mobile transportation automobiles, planes, ships, etc.
- combinations of the above-mentioned various devices can be mentioned.
- Communication devices are not limited to those that are portable or mobile, but are all types of devices, devices, systems that are not portable or fixed, such as smart home devices (home appliances, lighting equipment, smart meters or or Includes measuring instruments, control panels, etc.), vending machines, and any other "Things” that can exist on the IoT (Internet of Things) network.
- smart home devices home appliances, lighting equipment, smart meters or or Includes measuring instruments, control panels, etc.
- vending machines and any other “Things” that can exist on the IoT (Internet of Things) network.
- Communication includes data communication by a combination of these, in addition to data communication by a cellular system, a wireless LAN system, a communication satellite system, etc.
- the communication device also includes devices such as controllers and sensors that are connected or connected to communication devices that perform the communication functions described in the present disclosure.
- devices such as controllers and sensors that are connected or connected to communication devices that perform the communication functions described in the present disclosure.
- controllers and sensors that generate control and data signals used by communication devices that perform the communication functions of the communication device.
- Communication devices also include infrastructure equipment that communicates with or controls these non-limiting devices, such as base stations, access points, and any other device, device, or system. ..
- the terminal includes a control circuit that determines the transmission power of the uplink based on a plurality of signals received from a plurality of sources that perform cooperative communication of the uplink, and the determined transmission. It is equipped with a transmission circuit that performs uplink transmission by electric power.
- control circuit determines the uplink transmission power based on a plurality of transmission power candidates based on each of the plurality of signals.
- the plurality of signals include a trigger frame instructing the uplink transmission.
- the plurality of signals include a trigger frame instructing the start of the cooperative communication.
- the source access point to which the terminal connects is a second access point among the plurality of source access points, which is different from the first access point that controls the cooperative communication. Is.
- At least one resource in the time domain and frequency domain of the trigger frame, which is the signal transmitted from the plurality of second access points, is different from each other.
- control circuit determines whether or not to determine the transmission power based on the plurality of signals based on the information contained in at least one of the plurality of signals. ..
- the information is included in a common information field of the trigger frame, which is at least one signal.
- the information is the type of trigger frame that is the at least one signal.
- a receiving circuit for receiving information regarding the allowable interference power is further provided, and the control circuit determines the transmission power based on the allowable interference power.
- the information regarding the allowable interference power is included in the common information field of the trigger frame, which is at least one of the plurality of signals.
- the information regarding the allowable interference power is included in the user information field of the trigger frame, which is at least one of the plurality of signals.
- the information regarding the allowable interference power is included in a field individual to the terminal in the user information field.
- the communication device includes a transmission circuit for transmitting information regarding cooperative communication, and a reception circuit for receiving uplink transmission, which is transmitted based on the information regarding cooperative communication. , The transmission power of the uplink transmission is determined based on the information about the cooperative communication.
- the terminal determines the transmission power of the uplink based on the plurality of signals received from the plurality of sources that perform the uplink cooperative communication, and the determination is made. Uplink transmission is performed by the transmission power.
- the communication device transmits information on cooperative communication, receives uplink transmission transmitted based on the information on cooperative communication, and transmits power of the uplink transmission. Is determined based on the information regarding the cooperative communication.
- One embodiment of the present disclosure is useful for wireless communication systems.
- Control unit 12 Transmitter unit 100 AP 101,201 Transmission packet generation unit 102,202 Wireless transmission / reception unit 103,203 Received packet decoding unit 104,205 Control signal generation unit 204 Path loss measurement unit 206 Transmission power control unit
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Abstract
Description
11beでは、例えば、複数のアクセスポイント(「基地局」とも呼ばれる、以下、「AP(Access Point)」と呼ぶ)と端末(例えば、non-AP STA(station)とも呼ばれる、以下「STA」と呼ぶ)との間においてデータを送受信するMulti-AP (MAP) coordination(以下「協調通信」と呼ぶ)の適用が検討されている。
[無線通信システムの構成例]
本開示の一実施例に関わる無線通信システムは、少なくとも2つのAPと1つのSTAとを含む。
図10は、本実施の形態に係るAPの一例を示すブロック図である。図10に示すAP100は、送信パケット生成部101と、無線送受信部102と、受信パケット復号部103と、制御信号生成部104と、を有する。
図11は、本実施の形態に係るSTAの一例を示すブロック図である。図11に示すSTA200は、送信パケット生成部201と、無線送受信部202と、受信パケット復号部203と、パスロス測定部204と、制御信号生成部205と、送信電力制御部206と、を有する。
以下では、一例として、AP100及びSTA200によるUL-UL通信での協調の例について説明する。図12は、C-SR方式に基づいて協調するUL-UL通信の例を示す図である。
本実施の形態に係る基地局及び端末の構成例は、例えば、一部の機能が実施の形態1と異なり、他の機能は実施の形態1と同様でよい。
TxPowerBSS = (AP TX Power - RxPower) + UL Target RSSI (1)
TxPow=min(TxPowerOBSS, TxPowerBSS) (2)
本実施の形態に係る基地局及び端末の構成例は、例えば、一部の機能が実施の形態1と異なり、他の機能は実施の形態1と同様でよい。
TxPow=min(TxPowerOBSS1, TxPowerOBSS2, TxPowerBSS) (3)
実施の形態2及び実施の形態3では、STA200が、複数のAP100からの信号に基づいて、上りリンクの送信電力制御を行う場合について説明した。バリエーション1では、例えば、複数の信号に基づく送信電力制御の動作の有効及び無効をAP100が指示してもよい。
実施の形態1、実施の形態2及び実施の形態3において、MAP TFのCommon info fieldのフォーマットは、図5に示すフォーマットの代わりに、図20に示すフォーマットでもよい。また、MAP TFのUser info fieldのフォーマットは、図6に示すフォーマットの代わりに、図21に示すフォーマットでもよい。また、MAP TFにおいて図20及び図21に示すフォーマットが適用される場合、図7に示すTrigger Typeに関する情報(例えば、テーブル)の代わりに、図22に示すTrigger frameに関する情報が設定されてもよい。
11 制御部
12 送信部
100 AP
101,201 送信パケット生成部
102,202 無線送受信部
103,203 受信パケット復号部
104,205 制御信号生成部
204 パスロス測定部
206 送信電力制御部
Claims (16)
- 上りリンクの協調通信を行う複数の送信元から受信した複数の信号に基づいて、前記上りリンクの送信電力を決定する制御回路と、
前記決定された送信電力によって上りリンク送信を行う送信回路と、
を具備する端末。 - 前記制御回路は、前記複数の信号それぞれに基づく複数の送信電力候補に基づいて、前記上りリンクの送信電力を決定する、
請求項1に記載の端末。 - 前記複数の信号には、前記上りリンク送信を指示するトリガーフレームが含まれる、
請求項1に記載の端末。 - 前記複数の信号には、前記協調通信の開始を指示するトリガーフレームが含まれる、
請求項1に記載の端末。 - 前記端末が接続する送信元のアクセスポイントは、前記複数の送信元であるアクセスポイントのうち、前記協調通信を制御する第1のアクセスポイントと異なる第2のアクセスポイントである、
請求項1に記載の端末。 - 複数の前記第2のアクセスポイントから送信される前記信号であるトリガーフレームの時間領域及び周波数領域の少なくとも一方のリソースは互いに異なる、
請求項5に記載の端末。 - 前記制御回路は、前記複数の信号のうち少なくとも一つの信号に含まれる情報に基づいて、前記複数の信号に基づく前記送信電力の決定を行うか否かを判断する、
請求項1に記載の端末。 - 前記情報は、前記少なくとも一つの信号であるトリガーフレームの共通情報フィールドに含まれる、
請求項7に記載の端末。 - 前記情報は、前記少なくとも一つの信号であるトリガーフレームのタイプである、
請求項7に記載の端末。 - 許容干渉電力に関する情報を受信する受信回路、をさらに具備し、
前記制御回路は、前記許容干渉電力に基づいて、前記送信電力を決定する、
請求項1に記載の端末。 - 前記許容干渉電力に関する情報は、前記複数の信号のうち少なくとも一つの信号であるトリガーフレームの共通情報フィールドに含まれる、
請求項10に記載の端末。 - 前記許容干渉電力に関する情報は、前記複数の信号のうち少なくとも一つの信号であるトリガーフレームのユーザ情報フィールドに含まれる、
請求項10に記載の端末。 - 前記許容干渉電力に関する情報は、前記ユーザ情報フィールド内の端末に個別のフィールドに含まれる、
請求項12に記載の端末。 - 協調通信に関する情報を送信する、送信回路と、
前記協調通信に関する情報に基づいて送信された、上りリンク送信を受信する、受信回路と、を具備し、
前記上りリンク送信の送信電力は、前記協調通信に関する情報に基づいて決定される、
通信装置。 - 端末は、
上りリンクの協調通信を行う複数の送信元から受信した複数の信号に基づいて、前記上りリンクの送信電力を決定し、
前記決定された送信電力によって上りリンク送信を行う、
通信方法。 - 通信装置は、
協調通信に関する情報を送信し、
前記協調通信に関する情報に基づいて送信された、上りリンク送信を受信し、
前記上りリンク送信の送信電力は、前記協調通信に関する情報に基づいて決定される、
通信方法。
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US20230422179A1 (en) | 2023-12-28 |
JPWO2022079992A1 (ja) | 2022-04-21 |
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