EP-4740621-A1 - RESTRICTED TARGET WAKE TIME IN WIRELESS NETWORKS

Abstract

A non-access point multi-link device (non-AP MLD) in a wireless network, the non-AP MLD comprising a memory and a processor coupled to the memory, the processor is configured to: establish a membership for a restricted target wake time (R-TWT) schedule with an access point (AP) for a set of traffic identifiers (TIDs); transmit, to the AP, one or more frames corresponding to one or more TIDs that belongs to the set of TIDs within a service period (SP); transmit, to the AP, an indication indicating pending traffic with a TID that does not belong to the first set of TIDs; receive, from the AP, an indication indicating acceptance of transmission of the pending traffic; and transmit, to the AP, one or more frames corresponding to the TID that does not belong to the first set of TIDs.

Inventors

• SHAFIN, Rubayet
• NG, BOON LOONG

Assignees

• Samsung Electronics Co., Ltd.

Dates

Publication Date

20260513

Application Date

20241107

Claims (15)

1. A station, STA, in a wireless network, the STA comprising: a memory; and a processor coupled to the memory, the processor configured to: establish a membership for a restricted target wake time, R-TWT, schedule with an access point, AP, for a set of traffic identifiers, TIDs; transmit, to the AP, one or more frames corresponding to one or more TIDs that belong to the set of TIDs within a service period, SP; transmit, to the AP, an indication indicating pending traffic with a TID that does not belong to the set of TIDs; receive, from the AP, an indication indicating acceptance of transmission of the pending traffic; and transmit, to the AP, one or more frames corresponding to the TID that does not belong to the set of TIDs.
2. The STA of claim 1, wherein the indication indicating the pending traffic with the TID that does not belong to the set of TIDs is included within a buffer status report.
3. The STA of claim 1 or claim 2, wherein the indication indicating the pending traffic with the TID that does not belong to the set of TIDs is included within a request frame that includes a request to allow transmission of the pending traffic.
4. The STA of any one of the preceding claims, wherein the indication indicating the acceptance is received from the AP within a response frame that allows transmission of the pending traffic.
5. The STA of any one of the preceding claims, wherein the set of TIDs is associated with latency sensitive traffic.
6. The STA of any one of the preceding claims, wherein the TID that does not belong to the set of TIDs is associated with latency tolerant traffic.
7. The STA of any one of the preceding claims, wherein: the processor is further configured to receive, from the AP, a trigger frame that solicits transmission of the pending traffic; and the one or more frames corresponding to the TID that does not belong to the set of TIDs is transmitted in response to the trigger frame.
8. An access point, AP, in a wireless network, the AP comprising: a memory; and a processor coupled to the memory, the processor configured to: establish a membership for a restricted target wake time, R-TWT, schedule with a station, STA, for a set of traffic identifiers, TIDs; receive, from the STA, one or more frames corresponding to one or more TIDs that belongs to the set of TIDs within a service period, SP; receive, from the STA, an indication indicating pending traffic with a TID that does not belong to the set of TIDs; transmit, to the STA, an indication indicating acceptance of transmission of the pending traffic; and receive, from the STA, one or more frames corresponding to the TID that does not belong to the set of TIDs.
9. The AP of claim 8, wherein the indication indicating the pending traffic with the TID that does not belong to the set of TIDs is included within a buffer status report.
10. The AP of claim 8 or claim 9, wherein the indication indicating the pending traffic with the TID that does not belong to the set of TIDs is included within a request frame that includes a request to allow transmission of the pending traffic.
11. The AP of any one of claims 8 to 10, wherein the indication indicating the acceptance is transmitted to the STA within a response frame that allows transmission of the pending traffic.
12. The AP of any one of claims 8 to 11, wherein the set of TIDs is associated with latency sensitive traffic.
13. The AP of any one of claims 8 to 12, wherein the TID that does not belong to the set of TIDs is associated with latency tolerant traffic.
14. The AP of any one of claims 8 to 13, wherein: the processor is further configured to transmit, to the STA, a trigger frame that solicits transmission of the pending traffic; and the one or more frames corresponding to the TID that does not belong to the set of TIDs is received in response to the trigger frame.
15. A computer-implemented method for communication by a station, STA, in a wireless network, comprising: establishing a membership for a restricted target wake time, R-TWT, schedule with an access point (AP) for a set of traffic identifiers, TIDs; transmitting, to the AP, one or more frames corresponding to one or more TIDs that belongs to the set of TIDs within a service period, SP; transmitting, to the AP, an indication indicating pending traffic with a TID that does not belong to the set of TIDs; receiving, from the AP, an indication indicating acceptance of transmission of the pending traffic; and transmitting, to the AP, one or more frames corresponding to the TID that does not belong to the set of TIDs.

Description

RESTRICTED TARGET WAKE TIME IN WIRELESS NETWORKS This disclosure relates generally to a wireless communication system, and more particularly to, for example, but not limited to, restricted target wake time (TWT) operations in wireless networks. Wireless local area network (WLAN) technology has evolved toward increasing data rates and continues its growth in various markets such as home, enterprise and hotspots over the years since the late 1990s. WLAN allows devices to access the internet in the 2.4 GHz, 5GHz, 6GHz or 60 GHz frequency bands. WLANs are based on the Institute of Electrical and Electronic Engineers (IEEE) 802.11 standards. IEEE 802.11 family of standards aims to increase speed and reliability and to extend the operating range of wireless networks. WLAN devices are increasingly required to support a variety of delay-sensitive applications or real-time applications such as augmented reality (AR), robotics, artificial intelligence (AI), cloud computing, and unmanned vehicles. To implement extremely low latency and extremely high throughput required by such applications, multi-link operation (MLO) has been suggested for the WLAN. The WLAN is formed within a limited area such as a home, school, apartment, or office building by WLAN devices. Each WLAN device may have one or more stations (STAs) such as the access point (AP) STA and the non-access-point (non-AP) STA. The MLO may enable a non-AP multi-link device (MLD) to set up multiple links with an AP MLD. Each of multiple links may enable channel access and frame exchanges between the non-AP MLD and the AP MLD independently, which may reduce latency and increase throughput. The description set forth in the background section should not be assumed to be prior art merely because it is set forth in the background section. The background section may describe aspects or embodiments of the present disclosure. FIG. 1 illustrates an example of a wireless network in accordance with an embodiment. FIG. 2a illustrates an example of AP in accordance with an embodiment. FIG. 2b illustrates an example of STA in accordance with an embodiment. FIG. 3 illustrates an example of multi-link communication operation in accordance with an embodiment. FIG. 4 illustrates multi-link discovery and setup in accordance with an embodiment. FIG. 5 illustrates an example of channel under-utilization during restricted TWT SP in accordance with an embodiment. FIG. 6 illustrates transmitting a buffer status report (BSR) during R-TWT SP in accordance with an embodiment. FIG. 7 illustrates a response to BSR transmission during R-TWT SP in a non-trigger-based R-TWT SP in accordance with an embodiment. FIG. 8 illustrates a request rejection in accordance with an embodiment. FIG. 9 illustrates a request acceptance in accordance with an embodiment. FIG. 10 illustrates triggering non-R-TWT TID frame transmission in accordance with an embodiment. FIG. 11 illustrates triggering another STA during the R-TWT SP in accordance with an embodiment. FIG. 12 illustrates a flow chart of an example process by an STA requesting permission to transmit for a new TID in accordance with an embodiment. FIG. 13 illustrates a flow chart of an example process by an AP receiving a request from an STA to transmit to a new TID in accordance with an embodiment. In one or more implementations, not all of the depicted components in each figure may be required, and one or more implementations may include additional components not shown in a figure. Variations in the arrangement and type of the components may be made without departing from the scope of the subject disclosure. Additional components, different components, or fewer components may be utilized within the scope of the subject disclosure. The detailed description set forth below, in connection with the appended drawings, is intended as a description of various implementations and is not intended to represent the only implementations in which the subject technology may be practiced. Rather, the detailed description includes specific details for the purpose of providing a thorough understanding of the inventive subject matter. As those skilled in the art would realize, the described implementations may be modified in various ways, all without departing from the scope of the present disclosure. Accordingly, the drawings and description are to be regarded as illustrative in nature and not restrictive. Like reference numerals designate like elements. The following description is directed to certain implementations for the purpose of describing the innovative aspects of this disclosure. However, a person having ordinary skill in the art will readily recognize that the teachings herein can be applied in a multitude of different ways. The examples in this disclosure are based on WLAN communication according to the Institute of Electrical and Electronics Engineers (IEEE) 802.11 standard, including IEEE 802.11be standard and any future amendments to t