Multi-Link WLAN TID Mapping With Implicit Link Assignment
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Solution Overview
Problem
Existing wireless LAN technologies face challenges in providing high-speed services for new multimedia applications and efficiently mapping traffic identifiers (TIDs) to links in multi-link devices (MLDs) without explicit indication.
Innovation Solution
A method for a multi-link device (MLD) that includes a communication module and a processor to transmit request frames for configuring TID-to-link mapping, with default or previously configured mappings applied for certain TIDs, and receive response frames to manage and implicitly determine mapping relationships.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If explicit TID-to-link mapping indication is used in multi-link devices, then mapping precision is improved, but signaling overhead and device complexity increase
Solution Approach 1:
The system enables MLDs to autonomously determine TID-to-link mapping relationships without requiring explicit signaling from the peer device. Each MLD maintains local mapping information and uses it to implicitly establish mappings, eliminating the need for complex explicit indication protocols while maintaining precise mapping control
Solution Approach 2:
Mapping relationships are pre-configured and stored in each MLD before communication occurs. When a TID needs to be transmitted, the MLD directly uses the pre-established mapping relationship without needing to negotiate or indicate the mapping at transmission time, reducing signaling overhead while maintaining mapping precision
2Reliability
If comprehensive TID-to-link mapping signaling is implemented, then mapping completeness is improved, but communication efficiency deteriorates due to increased overhead
Solution Approach 1:
The patent extracts only the essential mapping information that needs to be communicated between MLDs, while maintaining complete mapping relationships locally. Each MLD transmits only the necessary mapping indications for specific TIDs, rather than comprehensive mapping data, ensuring mapping completeness is achieved through local storage while communication efficiency is maintained through minimal signaling
Solution Approach 2:
Instead of signaling complete mapping relationships for all TIDs, the system uses partial indication where only specific TID-to-link mappings that need to be established or modified are signaled. The remaining mappings are inferred or maintained from previous configurations, reducing signaling overhead while ensuring necessary mapping completeness
Data Source
AI summary
Disclosed is a method by which a multi-link device (MLD) of a wireless communication system transmits a frame. The MLD transmits a request frame for mapping between a traffic identifier (TID) and a link, and the request frame can include: first mapping information for establishing a mapping relationship between one or more TIDs from among a plurality of TIDs and one or more links; and information related to the number of the one or more TIDs for which mapping with the one or more links is requested. Thereafter, the MLD can receive a response frame in response to the request frame, and first remaining TIDs that exclude the one or more TIDs from among the plurality of TIDs maintain, to be valid, a previously established mapping relationship with a link, or a default mapping relationship is applied, and, for the first remaining TIDs, a mapping relationship with a specific link may not be indicated by the first mapping information.