TID-to-Link Mapping for Multi-Link BSR Scheduling
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Solution Overview
Problem
The IEEE 802.11ax standard faces challenges in meeting high user requirements for throughput, low jitter, and low latency due to the introduction of multi-link cooperation, particularly in implementing the buffer status report (BSR) mechanism for efficient scheduling.
Innovation Solution
A data transmission method and apparatus that introduces a BSR mechanism through multi-link (ML) cooperation, enabling a multi-link transmit end to send BSR signaling to a multi-link receive end, allowing for accurate scheduling based on a TID-to-link mapping relationship, using request and response messages to negotiate and set up this mapping, and incorporating BSR signaling formats that include various fields to determine service buffer sizes and types.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multi-link cooperation is introduced to improve throughput and reduce latency, then service transmission performance is improved, but scheduling complexity increases
Solution Approach 1:
The patent implements a buffer status report (BSR) mechanism where the transmit end feeds back buffer status information to the receive end through BSR signaling. This feedback enables the receive end to make informed scheduling decisions across multiple links, resolving the scheduling complexity issue while maintaining high throughput benefits of multi-link cooperation.
Solution Approach 2:
The patent segments the scheduling problem by introducing TID-to-link mapping relationships that associate specific traffic identifiers with specific links. This segmentation allows independent scheduling decisions for different traffic flows on different links, reducing overall scheduling complexity while improving service transmission rate through parallel operations.
2Measurement precision
If BSR mechanism is implemented for accurate scheduling, then scheduling precision is improved, but signaling overhead increases
Solution Approach 1:
The patent changes the parameter representation by encoding buffer status information in a compact format within BSR signaling. Instead of transmitting detailed buffer status data, the system uses scaled queue size indicators and TID-to-link mapping parameters, reducing signaling overhead while maintaining scheduling precision through the essential parameters needed for decision-making.
3Measurement precision
If TID-to-link mapping negotiation is performed, then service buffer size determination accuracy is improved, but negotiation time increases
Solution Approach 1:
The patent performs TID-to-link mapping negotiation in advance during the association or reassociation phase, before actual data transmission begins. This preliminary action ensures that the mapping relationships and buffer size determinations are established beforehand, eliminating negotiation delays during time-critical data transmission while maintaining accurate service buffer size determination.
Data Source
AI summary
This application provides data transmission methods and apparatuses, to introduce a buffer status report (BSR) mechanism through multi-link (ML) cooperation, to improve performance of scheduling a station by an ML device. In an example method, a multi-link transmit end determines BSR signaling sent to a multi-link receive end, where the BSR signaling can enable the multi-link receive end to schedule a station of the multi-link transmit end over one or more links. Further, the multi-link transmit end sends the B SR signaling to the multi-link transmit end over the one or more links. This introduces a BSR mechanism through ML cooperation.