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US-20260129585-A1 - ACCESS POINT, TERMINAL, AND COMMUNICATION METHOD

US20260129585A1US 20260129585 A1US20260129585 A1US 20260129585A1US-20260129585-A1

Abstract

This access point is provided with a control circuit which, on the basis of transmission power control-related information received from another access point, generates a parameter relating to uplink transmission power control, and a transmission circuit which transmits a control signal that includes said parameter.

Inventors

  • Tomofumi Takata
  • Yoshio Urabe
  • Takashi Iwai
  • Lei Huang

Assignees

  • PANASONIC INTELLECTUAL PROPERTY CORPORATION OF AMERICA

Dates

Publication Date
20260507
Application Date
20251230
Priority Date
20200525

Claims (20)

  1. 1 . An access point, comprising: a receiver, which, in operation, receives a transmission power control parameter from another access point in a negotiation with the another access point; and a transmitter, which, in operation, transmits information indicating transmission power of the another access point which is determined based on the transmission power control parameter.
  2. 2 . The access point according to claim 1 , wherein the access point transmits capability information of the access point to the another access point and receives capability information of the another access point from the another access point.
  3. 3 . The access point according to claim 1 , wherein the transmission power control parameter includes minimum transmit power of the another access points.
  4. 4 . The access point according to claim 1 , wherein the another access point receives the information indicating the transmission power of the another access point and transmits a Physical layer convergence procedure Protocol Data Unit (PPDU) based on the information indicating the transmission power of the another access point.
  5. 5 . The access point according to claim 1 , comprising: control circuitry, which, in operation, generates a parameter relating to uplink transmission power control, based on the transmission power control parameter, wherein the transmitter, in operation, transmits a control signal including the generated parameter relating to uplink transmission power control.
  6. 6 . The access point according to claim 5 , wherein the parameter relating to uplink transmission power control includes information on a downlink transmission power that is determined, for each of a plurality of terminals, corresponding to a type of uplink communication control.
  7. 7 . The access point according to claim 6 , wherein, the control signal includes common information including information common to the plurality of terminals and terminal-specific information specific to each of the plurality of terminals, the common information includes a common value relating to the downlink transmission power and common to the plurality of terminals, and the terminal-specific information includes an offset value for the common value.
  8. 8 . The access point according to claim 6 , wherein, the control signal includes common information including information common to the plurality of terminals and terminal-specific information specific to each of the plurality of terminals, the common information includes information on a plurality of the downlink transmission powers, and the terminal-specific information includes an index associated with the plurality of downlink transmission powers.
  9. 9 . The access point according to claim 5 , wherein the parameter relating to uplink transmission power control includes information on a downlink transmission power for each access point relating to uplink communication control.
  10. 10 . The access point according to claim 5 , wherein, the parameter relating to uplink transmission power control includes information on a target received signal strength of the access point in uplink communication control, a bit size corresponding to the information on the target received signal strength varies between a case of performing the uplink communication control in coordination between the access point and the another access point and a case of not performing the uplink communication control in coordination between the access point and the another access point.
  11. 11 . An access point, comprising: a receiver, which, in operation, receives a transmission power control parameter from another access point; and control circuitry, which, in operation, sets transmission power based on the transmission power control parameter.
  12. 12 . The access point according to claim 11 , wherein the transmission power control parameter includes transmission power of the another access point.
  13. 13 . The access point according to claim 11 , wherein the access point transmits capability information of the access point to the another access point and receives capability information of the another access point from the another access point.
  14. 14 . The access point according to claim 11 , wherein the access point indicates minimum transmit power of the access points in a negotiation with the another access point.
  15. 15 . The access point according to claim 11 , wherein the access point transmits a Physical layer convergence procedure Protocol Data Unit (PPDU) using the transmission power.
  16. 16 . The access point according to claim 11 , wherein the transmission power control parameter includes transmission power limitation information.
  17. 17 . A communication method for an access point, the communication method comprising: receiving a transmission power control parameter from another access point in a negotiation with the another access point; and transmitting information indicating transmission power of the another access point which is determined based on the transmission power control parameter.
  18. 18 . The communication method according to claim 17 , wherein the access point transmits capability information of the access point to the another access point and receives capability information of the another access point from the another access point.
  19. 19 . The communication method according to claim 17 , wherein the transmission power control parameter includes minimum transmit power of the another access points.
  20. 20 . The communication method according to claim 17 , wherein the another access point receives the information indicating the transmission power of the another access point and transmits a Physical layer convergence procedure Protocol Data Unit (PPDU) based on the information indicating the transmission power of the another access point.

Description

TECHNICAL FIELD The present disclosure relates to an access point, a terminal, and a communication method. BACKGROUND ART Establishment of technical specifications of the Institute of Electrical and Electronics Engineers (IEEE) 802.11be (hereinafter referred to as “11be”) has been undergoing as a succeeding standard of IEEE 802.11ax (hereinafter referred to as “11ax”) which is a standard of IEEE 802.11. In 11be, Multi-AP (MAP) coordination (e.g., also referred to as “coordinated communication”) has been discussed in which a plurality of access points (each also referred to as “base station” and will be referred to as “Access Point (AP)” hereinafter) and a plurality of terminals (each also referred to as “Station (STA)”) perform coordinated data transmission and reception in downlink and uplink (e.g., see Non-Patent Literature (hereinafter referred to as “NPL”) 1, 2, or 3). CITATION LIST Non Patent Literatures NPL 1 IEEE 802.11-19/1903r0, Uplink Coordinated Multi-AP NPL 2 IEEE 802.11-20/0056r0, Preparations for Coordinated OFDMA NPL 3 IEEE 802.11-20/0617r0, Multi-AP Operation-Basic Definition NPL 4 IEEE P802.11ax/D6.0, November 2019 NPL 5 IEEE 802.11-19/1582r2, Coordinated AP Time/Frequency Sharing in a Transmit Opportunity in 11be NPL 6 IEEE 802.11-19/1961r1, Multi-AP Group Establishment, 2020 Jan. 2 NPL 7 IEEE 802.11-19/1972r1, Operation of Virtual BSS for Multi-AP Coordination, 2019 Nov. 5 SUMMARY OF INVENTION However, methods of controlling a transmission power in radio communication such as a wireless local area network (WLAN) have not been sufficiently discussed. One non-limiting and exemplary embodiment facilitates providing an access point, a terminal, and a communication method each capable of flexibly controlling an uplink transmission power per terminal. An access point according to an exemplary embodiment of the present disclosure includes: control circuitry, which, in operation, generates a parameter relating to uplink transmission power control, based on information on transmission power control received from another access point; and transmission circuitry, which, in operation, transmits a control signal including the parameter. It should be noted that general or specific embodiments may be implemented as a system, an apparatus, a method, an integrated circuit, a computer program, a storage medium, or any selective combination thereof. According to an exemplary embodiment of the present disclosure, it is possible to flexibly control an uplink transmission power per terminal. Additional benefits and advantages of the disclosed embodiments will become apparent from the specification and drawings. The benefits and/or advantages may be individually obtained by the various embodiments and features of the specification and drawings, which need not all be provided in order to obtain one or more of such benefits and/or advantages. BRIEF DESCRIPTION OF DRAWINGS FIG. 1 illustrates an exemplary procedure of coordinated communication; FIG. 2 illustrates an exemplary format of a Common Info field; FIG. 3 illustrates an exemplary format of a User Info field; FIG. 4 illustrates an exemplary target received signal strength indicator (RSSI); FIG. 5 illustrates an exemplary Trigger type; FIG. 6 illustrates an example of uplink multi-AP coordination; FIG. 7 illustrates an exemplary coordinated AP (CAP) transmission (Tx) phase; FIG. 8 illustrates a configuration example of a radio communication system and an example of resource allocation; FIG. 9 is a block diagram illustrating a configuration example of part of an AP; FIG. 10 is a block diagram illustrating a configuration example of part of an STA; FIG. 11 is a block diagram illustrating a configuration example of the AP; FIG. 12 is a block diagram illustrating a configuration example of the STA; FIG. 13 is a sequence diagram illustrating an example of uplink coordinated communication processing; FIG. 14 illustrates an example of resource allocation; FIG. 15 illustrates examples of a Common Info field and a User Info field according to Example 1; FIG. 16 illustrates an exemplary User Info field according to Example 1; FIG. 17 illustrates examples of a Common Info field and a User Info field according to Example 2; FIG. 18 illustrates other examples of the Common Info field and the User Info field according to Example 2; FIG. 19 illustrates an exemplary Common Info field according to Switching Method 1; FIG. 20 illustrates an exemplary Trigger type according to Switching Method 4; FIG. 21 illustrates an exemplary Trigger type according to Switching Method 5; FIG. 22 illustrates an exemplary Trigger type according to Switching Method 6; FIG. 23 illustrates an example of Trigger Dependent Common Info according to Switching Method 6; FIG. 24 illustrates examples of a Common Info field and a User Info field according to Example 3; FIG. 25 illustrates other examples of the Common Info field and the User Info field according to Example 3; FIG. 26 illustrates an exempl