# US 12,120,657 B2 · Method for transmit and receive power control in mesh systems > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,120,657 B2 - Document ID: US12120657B2 - Status: Granted - Kind: B2 - Application number: 18/369,529 - Filed: 2023-09-18 - Published: 2024-01-04 - Granted: 2024-10-15 - Earliest claimed: 2005-04-08 - Assignees: InterDigital Technology Corporation - Applicants: Interdigital Technology Corporation - Inventors: Marian Rudolf; Vincent Roy - Web page: https://patentgrep.com/patent/US12120657B2 ## CPC - H04W 72/0473: {the resource being transmission power} - H04W 4/06: Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services - H04W 52/18: TPC being performed according to specific parameters - H04W 52/362: {Aspects of the step size} - H04W 52/367: {Power values between minimum and maximum limits, e.g. dynamic range} - H04W 52/46: in multi-hop networks, e.g. wireless relay networks - H04W 84/18: Self-organising networks, e.g. ad-hoc networks or sensor networks - H04L 1/0001: {Systems modifying transmission characteristics according to link quality, e.g. power backoff (adaptive data allocation for multicarrier modulation H04L5/0044; controlling transmission power for radio systems H04W52/04)} - H04L 12/18: for broadcast or conference {, e.g. multicast} - H04L 27/2655: {Synchronisation arrangements} - H04W 52/146: {Uplink power control} - H04W 52/243: {taking into account interferences} - H04W 52/286: {during data packet transmission, e.g. high speed packet access [HSPA]} - H04W 52/50: at the moment of starting communication in a multiple access environment - H04W 52/54: Signalisation aspects of the TPC commands, e.g. frame structure - H04W 74/002: {Transmission of channel access control information} - H04W 84/12: WLAN [Wireless Local Area Networks] - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) ## Abstract A method and apparatus for controlling transmit power in a wireless local area network (WLAN). For example, a station may receive, from an access point (AP), a beacon frame that includes a field indicating a maximum transmission power for at least one of a plurality of operational bandwidth that the AP supports. The station may determine a transmission power for a signal to be transmitted to the AP based on the at least one of the plurality of operational bandwidths indicated in the received beacon. The station may then transmit the signal at the determined transmission power. ## Claims ### Claim 1 A method for use in a station (STA), the method comprising: receiving, from an access point (AP), an information element that indicates one or more maximum transmission powers associated with a plurality of operational bandwidths that the STA supports; and transmitting, to the AP, a signal in an operational bandwidth that the STA supports at a transmission power determined based on the indicated one or more maximum transmission powers in the received information element. ### Claim 2 (depends on 1) The method of claim 1, wherein the plurality of operational bandwidths includes at least a 20 MHz channel bandwidth and a 40 MHz channel bandwidth. ### Claim 3 (depends on 1) The method of claim 1, wherein the information element is included in a received beacon frame. ### Claim 4 (depends on 1) The method of claim 1, wherein the plurality of operational bandwidths includes simultaneously operable bandwidths. ### Claim 5 (depends on 1) The method of claim 1, further comprising: transmitting, to the AP, a probe request frame that includes an indicator indicating a plurality of operational bandwidths that the STA supports. ### Claim 6 (depends on 5) The method of claim 5, wherein the information element is included in a received probe response frame. ### Claim 7 A station (STA) comprising: a receiver configured to receive, from an access point (AP), an information element that indicates one or more maximum transmission powers associated with a plurality of operational bandwidths that the STA supports; and a transmitter configured to transmit, to the AP, a signal in an operational bandwidth that the STA supports at a transmission power determined based on the indicated one or more maximum transmission powers in the received information element. ### Claim 8 (depends on 7) The STA of claim 7, wherein the plurality of operational bandwidths includes at least a 20 MHz channel bandwidth and a 40 MHz channel bandwidth. ### Claim 9 (depends on 7) The STA of claim 7, wherein the information element is included in a received beacon frame. ### Claim 10 (depends on 7) The STA of claim 7, wherein the plurality of operational bandwidths includes simultaneously operable bandwidths. ### Claim 11 (depends on 7) The STA of claim 7, wherein the transmitter is further configured to transmit, to the AP, a probe request frame that includes an indicator indicating a plurality of operational bandwidths that the STA supports. ### Claim 12 (depends on 11) The STA of claim 11, wherein the information element is included in a received probe response frame. ### Claim 13 An access point (AP) comprising: a transmitter configured to transmit, to a station (STA), an information element that indicates one or more maximum transmission powers associated with a plurality of operational bandwidths that the STA supports; and a receiver configured to receive, from the STA, a signal in an operational bandwidth that the STA supports at a transmission power determined based on the indicated one or more maximum transmission powers in the transmitted information element. ### Claim 14 (depends on 13) The AP of claim 13, wherein the plurality of operational bandwidths includes at least a 20 MHz channel bandwidth and a 40 MHz channel bandwidth. ### Claim 15 (depends on 13) The AP of claim 13, wherein the information element is included in a transmitted beacon frame. ### Claim 16 (depends on 13) The AP of claim 13, wherein the plurality of operational bandwidths includes simultaneously operable bandwidths. ### Claim 17 (depends on 13) The AP of claim 13, wherein the receiver is further configured to receive, from the STA, a probe request frame that includes an indicator indicating a plurality of operational bandwidths that the STA supports. ### Claim 18 (depends on 17) The AP of claim 17, wherein the information element is included in a transmitted probe response frame.