MU-RTS TXOP Sharing Trigger Frame for 802.11be Resource Allocation
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Solution Overview
Problem
Current trigger frame designs in IEEE 802.11 Extremely High Throughput (EHT) or 802.11be do not effectively signal resource allocation for enhanced features such as multi-AP, multi-band/multi-link, 320 MHz bandwidth, and 16 spatial streams.
Innovation Solution
The proposed solution involves an enhanced trigger frame and its variants, which include a method where a first station receives a multi-user request-to-send (MU-RTS) transmission opportunity (TXOP) sharing trigger frame from an access point (AP). This frame indicates that the AP is sharing a TXOP with a second station and specifies the duration of the shared TXOP. The first station then transmits uplink frames within the indicated duration, which may include non-trigger based physical layer protocol data units (PPDUs) like clear-to-send (CTS) frames.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the current trigger frame design is used, then the structure is simple and backward compatible, but it cannot effectively signal resource allocation for enhanced features such as multi-AP, multi-band/multi-link, 320 MHz bandwidth, and 16 spatial streams
Solution Approach 1:
The trigger frame is segmented into multiple functional fields including Common Info field, User Info fields, and extension fields. Each field serves a specific purpose in signaling different aspects of resource allocation, allowing the frame to handle complex 802.11be features while maintaining a structured and manageable format
Solution Approach 2:
Specific signaling information for enhanced features is extracted into dedicated fields within the trigger frame structure. This includes fields for indicating resource unit allocation, spatial stream configuration, and bandwidth parameters, separating these critical signaling functions from the general frame structure
Solution Approach 3:
The trigger frame is designed with multi-functional fields that can accommodate different feature sets. The same frame structure can signal resource allocation for various scenarios including multi-AP coordination, multi-band operations, different bandwidth configurations, and multiple spatial streams, making it universally applicable across diverse 802.11be use cases
2Productivity
If TXOP sharing is implemented to enable multi-user communication, then resource utilization improves, but the trigger frame must include additional fields indicating sharing duration and user information
Solution Approach 1:
The trigger frame incorporates dynamic fields that can be adjusted based on the number of users sharing the TXOP and the duration of sharing. The User Info fields and duration indicators are configured adaptively to match the actual resource allocation scenario, allowing the frame structure to scale with the complexity of the sharing arrangement
Solution Approach 2:
The trigger frame uses configurable parameters including duration values, user identifiers, and resource allocation indicators that can be modified to reflect different TXOP sharing scenarios. These parameters enable the same frame structure to represent various sharing configurations without requiring fundamentally different frame formats
Data Source
AI summary
A method performed by a first station (STA) may compromise: receiving, from an access point (AP) that has an established transmission opportunity (TXOP) with a second STA, a multi-user request-to-send (MU-RTS) transmission opportunity (TXOP) sharing (TXS) trigger frame, wherein the MU-RTS TXS trigger frame includes: (i) an indication that the AP is sharing the TXOP established with the second STA with the first STA, and (ii) an indication of a duration of the shared TXOP; and transmitting, in response to the MU-RTS TXS trigger frame, one or more uplink (UL) frames within the duration of the shared TXOP indicated by the MU-RTS TXS trigger frame.