IP Library › Granted Patent US 12,356,338
Granted Patent B2
US 12,356,338 · App. 18/307,965 · Granted Jul 8, 2025

Clear channel assessment (CCA) threshold adaptation method

Inventors: Oghenekome Oteri (San Diego, CA); Pengfei Xia (San Diego, CA); Xiaofei Wang (North Caldwell, NJ); Hanqing Lou (Syosset, NY); Monisha Ghosh (Chicago, IL); Robert Olesen (Huntington, NY); Nirav B Shah (San Diego, CA); Frank LaSita (Long Beach, NY)
Assignee: InterDigital Patent Holdings, Inc.
H04W52/243H04W52/12H04W74/0808H04W84/12
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Quick Facts
Patent No.
US 12,356,338
App. No.
18/307,965
Granted
Jul 8, 2025
Kind
B2
Abstract

Methods and apparatuses are described herein for adapting clear channel assessment (CCA) thresholds with or without Transmit Power Control (TPC) are disclosed. An IEEE 802.11 station (STA) may dynamically calculate a STA specific transmit power control (TPC) value and a STA specific clear channel assessment (CCA) value based on a target TPC parameter and a target CCA parameter. The target TPC parameter and the target CCA parameter may be received from an IEEE 802.11 cluster head configured to control TPC and CCA for a plurality of STAs associated with the BSS. The target TPC parameter and the target CCA parameter also may be related. The STA may then determine whether a carrier sense multiple access (CSMA) wireless medium of a wireless local area network (WLAN) basic service set (BSS) is occupied or idle based on the STA specific CCA value.

Claims (26)

1. A method for use in a station (STA), the method comprising:

receiving, from an access point (AP) associated with a Basic Service Set (BSS), a transmit power control (TPC) clear channel assessment (CCA) constant for a wireless network comprising the BSS and a neighboring BSS, wherein the TPC CCA constant indicates a CCA threshold for a group of STAs associated with the neighboring BSS;

determining, based on the TPC CCA constant and a transmit power selected by the STA, a STA specific CCA threshold to be used by the STA; and

transmitting, based on the determined STA specific CCA threshold, to the AP, one or more frames.

2. The method of claim 1 , wherein a product of a linear unit of the transmit power and a linear unit of the STA specific CCA threshold is the TPC CCA constant.

3. The method of claim 1 , wherein the transmit power is less than or equal to a maximum transmit power of the STA.

4. The method of claim 1 , wherein the AP is an IEEE 802.11 cluster head configured to control TPC and CCA for a plurality of STAs associated with the BSS.

5. A station (STA) comprising:

a processor; and

a transceiver,

the processor and the transceiver configured to:

receive, from an access point (AP) associated with a Basic Service Set (BSS), a transmit power control (TPC) clear channel assessment (CCA) constant for a wireless network comprising the BSS and a neighboring BSS, wherein the TPC CCA constant indicates a CCA threshold for a group of STAs associated with the neighboring BSS;

determine, based on the TPC CCA constant and a transmit power selected by the STA, a STA specific CCA threshold to be used by the STA; and

transmit, based on the determined STA specific CCA threshold, to the AP, one or more frames.

6. The STA of claim 5 , wherein a product of a linear unit of the transmit power and a linear unit of the STA specific CCA threshold is the TPC CCA constant.

7. The STA of claim 5 , wherein the transmit power is less than or equal to a maximum transmit power of the STA.

8. The STA of claim 5 , wherein the AP is an IEEE 802.11 cluster head configured to control TPC and CCA for a plurality of STAs associated with the BSS.

9. An access point (AP) comprising:

a processor; and

a transceiver,

the processor and the transceiver configured to:

transmit, to a station (STA) associated with a Basic Service Set (BSS), a transmit power control (TPC) clear channel assessment (CCA) constant for a wireless network comprising the BSS and a neighboring BSS, wherein the TPC CCA constant indicates a CCA threshold for a group of STAs associated with the neighboring BSS; and

receive a frame, from the STA, and transmitted based on a STA specific CCA threshold.

10. The AP of claim 9 , wherein a product of a linear unit of the transmit power and a linear unit of the STA specific CCA threshold is the TPC CCA constant.

11. The AP of claim 9 , wherein the transmit power is less than or equal to a maximum transmit power for the STA.

12. The AP of claim 9 , wherein the AP is an IEEE 802.11 cluster head configured to control TPC and CCA for a plurality of STAs associated with the BSS.

Continuity (7)
Continuation 17335734 · Jun 1, 2021
Continuation 16820986 · Mar 17, 2020
Continuation 16275046 · Feb 13, 2019
Continuation 15797886 · Oct 30, 2017
Continuation 15021634
Provisional Application 61877699 · Sep 13, 2013
Related Publication 20240089866A1 · Mar 14, 2024
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