TID-to-Link Mapping for Accurate Multi-Link BSR Scheduling
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Solution Overview
Problem
The IEEE 802.11ax standard faces challenges in meeting user requirements for high throughput, low jitter, and low latency due to the difficulty in integrating a buffer status report (BSR) mechanism for multi-link (ML) cooperation, necessitating improvements in scheduling performance for ML devices.
Innovation Solution
A data transmission method and apparatus that introduces a BSR mechanism through ML cooperation, enabling multi-link transmit and receive ends to negotiate and establish a traffic identifier-to-link (TID-to-link) mapping relationship, allowing for accurate determination and transmission of BSR signaling to improve scheduling performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If IEEE 802.11ax standard is used with OFDMA technology, then service transmission rate is improved, but scheduling performance for multi-link devices deteriorates due to lack of BSR mechanism
Solution Approach 1:
The patent segments the buffer status reporting by dividing it into per-TID (Traffic Identifier) buffer status reports for each link. This allows the multi-link device to report buffer status separately for each TID-to-link mapping, enabling the access point to perform precise scheduling decisions for uplink OFDMA resources based on the specific buffer status of each traffic stream on each link.
Solution Approach 2:
The patent introduces a new dimension to the buffer status reporting mechanism by adding link identification to the traditional BSR structure. The BSR signaling now includes both TID information and link information, creating a multi-dimensional reporting structure that enables the access point to understand which buffer corresponds to which link, thereby improving scheduling accuracy in multi-link scenarios.
2Reliability
If BSR mechanism is introduced for multi-link cooperation, then scheduling performance is improved, but device complexity increases
Solution Approach 1:
The patent applies preliminary action by establishing TID-to-link mapping relationships before buffer status reporting occurs. The multi-link device and access point negotiate and configure the mapping between traffic identifiers and specific links in advance, so that when buffer status reporting is needed, the device can directly report based on the pre-established mapping without complex real-time decision-making.
Solution Approach 2:
The patent implements partial action by reporting buffer status only for those TIDs that have data to transmit on each link. Instead of reporting buffer status for all possible TIDs on all links, the device selectively reports only the relevant buffer statuses, reducing the signaling overhead and complexity while still providing sufficient information for effective scheduling.
3Measurement precision
If TID-to-link mapping negotiation is performed, then BSR signaling accuracy is improved, but communication overhead increases
Solution Approach 1:
The patent changes the parameters of the BSR signaling by incorporating link identification information into the buffer status report structure. The BSR now includes TID fields, link identifier fields, and buffer size fields, transforming the traditional single-dimension BSR into a multi-parameter report that accurately reflects the buffer status across multiple links and traffic streams.
Data Source
AI summary
This application provides data transmission methods, computer-readable storage media, and an apparatus. An example method includes: determining a traffic identifier-to-link (TID-to-link) mapping relationship; and sending mapping information which indicates the TID-to-link mapping relationship, wherein the mapping information comprises a TID bitmap field and N link identifier bitmap fields, N is a positive integer, wherein a bit whose value is 1 in the TID bitmap field indicates that a TID identified by a position of the bit whose value is 1 in the TID bitmap field corresponds to one of the N link identifier bitmap fields, a bit whose value is 1 in a link identifier bitmap field indicates that a TID corresponding to the link identifier bitmap field is mapping to a link identified by a position of the bit whose value is 1 in the link identifier bitmap field.