US-12628087-B2 - Terminal, communication device, and communication method

US12628087B2US 12628087 B2US12628087 B2US 12628087B2US-12628087-B2

Abstract

This terminal comprises: a control circuit that determines, on the basis of a plurality of signals received from a plurality of transmission sources that carry out uplink cooperative communication, the uplink transmission power; and a transmission circuit that carries out uplink transmission via the determined transmission power.

Inventors

Hiroyuki Kanaya
Takashi Iwai
Tomofumi Takata
Yoshio Urabe
Taichi MIURA

Assignees

PANASONIC INTELLECTUAL PROPERTY CORPORATION OF AMERICA

Dates

Publication Date: 20260512
Application Date: 20210812
Priority Date: 20201015

Claims (14)

1 . A terminal, comprising: control circuitry, which, in operation, determines transmission power of an uplink based on a first signal received from a first transmission source and a second signal received from a second transmission source, the first transmission source and the second transmission source performing coordinated communication of the uplink; and transmission circuitry, which, in operation, performs uplink transmission with the determined transmission power, wherein the control circuitry, in operation, determines the transmission power of the uplink based on a first information included in the first signal and a second information included in the second signal.
2 . The terminal according to claim 1 , wherein the control circuitry determines the transmission power of the uplink based on a first transmission power candidate and a second transmission power candidate that are based on the first signal and the second signal, respectively.
3 . The terminal according to claim 1 , wherein each of the first signal and the second signal includes a trigger frame that indicates the uplink transmission.
4 . The terminal according to claim 1 , wherein each of the first signal and the second signal includes a trigger frame that indicates initiation of the coordinated communication.
5 . The terminal according to claim 1 , wherein the first transmission source and the second transmission source are respectively a first access point (AP 1 ) and a second access point (AP 2 ), and the terminal is associated with the second access point (AP 2 ) different from the first access point (AP 1 ) that controls the coordinated communication.
6 . The terminal according to claim 5 , wherein resources for trigger frames are different from each other in at least one of a time domain and/or a frequency domain, the trigger frames being signals transmitted from a plurality of the second access points (AP 2 s ).
7 . The terminal according to claim 1 , wherein the control circuitry decides whether to determine the transmission power based on the first signal and the second signal, based on information included in at least one of the first signal or the second signal.
8 . The terminal according to claim 7 , wherein the information is included in a common information field of a trigger frame that is at least one of the first signal or the second signal.
9 . The terminal according to claim 7 , wherein the information is a type of a trigger frame that is at least one of the first signal or the second signal.
10 . The terminal according to claim 1 , further comprising reception circuitry, which, in operation, receives information on acceptable interference power, wherein the control circuitry determines the transmission power based on the acceptable interference power.
11 . The terminal according to claim 10 , wherein the information on the acceptable interference power is included in a common information field of a trigger frame that is at least one of the first signal or the second signal.
12 . The terminal according to claim 10 , wherein the information on the acceptable interference power is included in a user information field of a trigger frame that is at least one of the first signal or the second signal.
13 . The terminal according to claim 12 , wherein the information on the acceptable interference power is included in a field individual for the terminal in the user information field.
14 . A communication method, comprising: determining, by a terminal, transmission power of an uplink based on a first signal received from a first transmission source and a second signal received from a second transmission source, the first transmission source and the second transmission source performing coordinated communication of the uplink, and performing, by the terminal, uplink transmission with the determined transmission power, wherein the transmission power of the uplink is determined based on a first information included in the first signal and a second information included in the second signal.

Description

TECHNICAL FIELD The present disclosure relates to a terminal, a communication apparatus, and a communication method. BACKGROUND ART The technical specification of the Institute of Electrical and Electronics Engineers (IEEE) 802.11be (hereinafter, referred to as “11be”) has been developed as the successor standard of 802.11ax (hereinafter, referred to as “11ax”), which is a standard of IEEE 802.11. In 11be, application of cooperated communication of an uplink (UL) has been discussed. CITATION LIST Non-Patent Literature NPL 1 IEEE 802.11-19/1102r0, A unified transmission procedure for multi-AP coordination, July 2019 NPL 2 IEEE 802.11-20/1040r1, Coordinated Spatial Reuse: Extension to Uplink. July 2020 NPL 3 IEEE P802.11ax/D6.0. November 2019 SUMMARY OF INVENTION There is scope for further study, however, on a method for transmission power control in coordinated communication of the uplink. One non-limiting and exemplary embodiment of the present disclosure facilitates providing a terminal, a communication apparatus, and a communication method each capable of enhancing efficiency of transmission power control in coordinated communication of the uplink. A terminal according to an embodiment of the present disclosure includes: control circuitry, which, in operation, determines transmission power of an uplink based on a plurality of signals received from a plurality of transmission sources performing coordinated communication of the uplink; and transmission circuitry, which, in operation, performs uplink transmission with the determined transmission power. It should be noted that a general or specific embodiment 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 embodiment of the present disclosure, efficiency of transmission power control in coordinated communication can be enhanced. 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 operation of Downlink (DL)-DL communication; FIG. 2 illustrates an exemplary operation of Uplink (UL)-UL communication; FIG. 3 illustrates an exemplary operation of Coordinated spatial reuse (C-SR); FIG. 4 illustrates exemplary types of a Medium Access Control (MAC) frame; FIG. 5 illustrates an exemplary format of a Common info field: FIG. 6 illustrates an exemplary format of a User info field; FIG. 7 illustrates exemplary Trigger Types: FIG. 8 illustrates an exemplary operation of Parameterized spatial reuse (PSR)-based spatial reuse: FIG. 9 is a block diagram illustrating an exemplary configuration of a part of a terminal (STA: Station); FIG. 10 is a block diagram illustrating an exemplary configuration of an access point (AP: Access Point); FIG. 11 is a block diagram illustrating an exemplary configuration of the STA; FIG. 12 illustrates an exemplary placement of APs and STAs: FIG. 13 is a sequence diagram illustrating exemplary UL-UL communication according to Embodiment 1: FIG. 14 illustrates an exemplary format of a Multi-AP (MAP) Trigger frame; FIG. 15 illustrates another exemplary format of the Multi-AP (MAP) Trigger frame: FIG. 16 illustrates still another exemplary format of the Multi-AP (MAP) Trigger frame; FIG. 17 is a sequential diagram illustrating exemplary UL-UL communication according to Embodiment 2; FIG. 18 illustrates an exemplary placement of APs and STAs; FIG. 19 is a sequential diagram illustrating exemplary UL-UL communication according to Embodiment 3; FIG. 20 illustrates an exemplary Common info field of the MAP Trigger frame; FIG. 21 illustrates an exemplary User info field of the MAP Trigger frame; FIG. 22 illustrates exemplary Trigger Types: FIG. 23 illustrates an exemplary format of the MAP Trigger frame; and FIG. 24 illustrates exemplary types of the MAC frame. DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. [Coordinated Communication] In 11be, for example, application of Multi-AP (hereinafter, referred to as “MAP”) coordination (hereinafter, referred to as “coordinated communication”) has been discussed, in which data transmission and reception between a plurality of access points (also referred to as “base station”, hereinafter, referred to as AP) and a plurality of terminals (also referred to as “non-AP station (STA)”, hereinafter, referred to as “STA”) is performed. Communication modes include communication from AP to STA (hereinafter, referred to as “DL communication”) and communication from STA to AP (hereinafter, referred to as “UL communication”). For the coordina