Access point (AP) controlled uplink RTS/CTS configuration and disablement

Patent metadata

Field	Value
Publication number	US-10588152-B2
Application number	US-201916252314-A
Country	US
Kind code	B2
Filing date	Jan 18, 2019
Priority date	Aug 25, 2015
Publication date	Mar 10, 2020
Grant date	Mar 10, 2020

Abstract

The present disclosure provides techniques for configuring the utilization of request-to-send/clear-to-send (RTS/CTS) protocol procedures based on varying conditions at the STA. For example, an AP may identify one or more conditions, when satisfied, may trigger the STA to either enable or disable uplink (UL) transmissions associated with a RTS/CTS protocol procedure. In some aspects, an AP may determine a transmit opportunity (TXOP) threshold for an STA and may determine whether to broadcast a message having the TXOP threshold to multiple STAs including the STA or unicast the message to the STA. An STA may receive a message from an AP having a TXOP threshold and may replace, based on an indication in the received message, a current TXOP threshold in the STA with the TXOP threshold in the received message. The STA may transmit an UL RTS frame in response to a determination that a planned TXOP duration satisfies the TXOP threshold.

First claim

What is claimed is:

1. A method for wireless communication at an access point (AP), comprising:
determining a transmit opportunity (TXOP) threshold for a station (STA) associated with the AP;
identifying one or more conditions for triggering one of disabling or enabling uplink (UL) transmissions of a request-to-send/clear-to-send (RTS/CTS) protocol at the STA, wherein:
the one or more conditions further comprises a planned TXOP duration satisfying or not satisfying the TXOP threshold;
the planned TXOP duration satisfying the TXOP threshold triggers the enabling of the UL transmissions of the RTS/CTS protocol at the STA;
the planned TXOP duration not satisfying the TXOP threshold triggers the disabling of the UL transmissions of the RTS/CTS protocol at the STA;

determining to broadcast a message having the TXOP threshold to one or more STAs including the STA or to unicast the message to the STA;
transmitting the message according to the determination to broadcast the message or to unicast the message; and
transmitting a configuration message to the STA, the configuration message including configuration information indicating the one or more conditions.

2. The method of claim 1 , wherein:
identifying the one or more conditions comprises identifying a time window or a channel to disable the UL transmissions of the RTS/CTS protocol at the STA; and
the configuration message includes the configuration information indicating the time window or the channel.

3. The method of claim 1 , wherein the message includes an information element (IE) having the TXOP threshold.

4. The method of claim 1 , wherein the one or more conditions include a disabling condition in which a link quality parameter is greater than a predetermined link quality threshold.

5. The method of claim 4 , wherein:
the link quality parameter is a RSSI and the predetermined link quality threshold is a RSSI threshold, or
the link quality parameter is a MCS index value and the predetermined link quality threshold is a RSSI threshold.

6. The method of claim 1 , wherein the one or more conditions include a disabling condition in which a collision parameter is less than a predetermined collision threshold.

7. A method for wireless communication at a station (STA), comprising:
receiving, from an access point (AP), a message having a transmit opportunity (TXOP) threshold;
receiving, from the AP, a configuration message including configuration information indicating one or more conditions for triggering one of disabling or enabling uplink (UL) transmissions of a request-to-send/clear-to-send (RTS/CTS) protocol at the STA, wherein:
the one or more conditions further comprises a planned TXOP duration satisfying or not satisfying the TXOP threshold;
the planned TXOP duration satisfying the TXOP threshold triggers the enabling of the UL transmissions of the RTS/CTS protocol at the STA;
the planned TXOP duration not satisfying the TXOP threshold triggers the disabling of the UL transmissions of the RTS/CTS protocol at the STA; and

configuring the STA based on the configuration information provided in the configuration message.

8. The method of claim 7 , wherein receiving the configuration message from the AP comprises replacing, based on an indication in the configuration message, a current TXOP threshold in the STA with the TXOP threshold in the message.

9. The method of claim 8 , wherein the message is a broadcast message from the AP, and the indication is a single bit in the broadcast message that is a common indication to replace the current TXOP threshold with the TXOP threshold in the broadcast message.

10. The method of claim 8 , wherein the message is a broadcast message from the AP, and the indication is a bitmap in the broadcast message where one set bit in the bitmap identifies the STA as a specific STA for which the current TXOP threshold is to be replaced with the TXOP threshold in the broadcast message.

11. The method of claim 8 , wherein the message is a unicast message and the current TXOP threshold in the STA is a previously broadcast TXOP threshold to be replaced with the TXOP threshold in the unicast message.

12. The method of claim 7 , wherein the message includes an uplink (UL) request-to-send/clear-to-send (RTS/CTS) control information element (IE) having the TXOP threshold.

13. The method of claim 7 , further comprising:
determining that the planned TXOP duration satisfies the TXOP threshold; and
transmitting an UL RTS protocol in response to a determination that the planned TXOP duration satisfies the TXOP threshold.

14. An station (STA) for wireless communication, comprising:
a memory;
a transceiver; and
a processor operatively coupled to the memory and the transceiver, wherein the processor is configured to:
receive, via the transceiver from an access point (AP), a message having a transmit opportunity (TXOP) threshold;
receive, via the transceiver from the AP, a configuration message including configuration information indicating one or more conditions for triggering one of disabling or enabling uplink (UL) transmissions of a request-to-send/clear-to-send (RTS/CTS) protocol at the STA, wherein:
the one or more conditions further comprises a planned TXOP duration satisfying or not satisfying the TXOP threshold;
the planned TXOP duration satisfying the TXOP threshold triggers the enabling of the UL transmissions of the RTS/CTS protocol at the STA;
the planned TXOP duration not satisfying the TXOP threshold triggers the disabling of the UL transmissions of the RTS/CTS protocol at the STA; and

configure the STA based on the configuration information provided in the configuration message.

15. The STA of claim 14 , wherein in response to receiving the configuration message from the AP the processor is further configured to replace, based on an indication in the configuration message, a current TXOP threshold in the STA with the TXOP threshold in the message.

16. The STA of claim 15 , wherein the message is a broadcast message from the AP, and the indication is a single bit in the broadcast message that is a common indication to replace the current TXOP threshold with the TXOP threshold in the broadcast message.

17. The STA of claim 15 , wherein the message is a broadcast message from the AP, and the indication is a bitmap in the broadcast message where one set bit in the bitmap identifies the STA as a specific STA for which the current TXOP threshold is to be replaced with the TXOP threshold in the broadcast message.

18. The STA of claim 15 , wherein the message is a unicast message and the current TXOP threshold in the STA is a previously broadcast TXOP threshold to be replaced with the TXOP threshold in the unicast message.

19. The STA of claim 14 , wherein the message includes an uplink (UL) request-to-send/clear-to-send (RTS/CTS) control information element (IE) having the TXOP threshold.

20. The STA of claim 14 , wherein the processor is further configured to:
determine that the planned TXOP duration satisfies the TXOP threshold; and
transmit an UL RTS protocol in response to a determination that the planned TXOP duration satisfies the TXOP threshold.

Assignees

• Qualcomm Inc

Inventors

• Zhou Yan
• Barriac Gwendolyn Denise
• Cherian George
• Merlin Simone
• Asterjadhi Alfred
• Tian Qingjiang
• Ding Gang

Classifications

• H04W74/006 Primary

  in the downlink, i.e. towards the terminal · CPC title

• H04W84/12

  WLAN [Wireless Local Area Networks] · CPC title

• H04W74/0816 Primary

  with collision avoidance · CPC title