Multi-Link TIM Mechanism for Wireless Data Retrieval
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Solution Overview
Problem
Current wireless communication systems using Traffic Indication Maps (TIM) face inefficiencies in multi-link configurations, particularly in managing Traffic Identifiers (TIDs) to links, leading to overhead and delayed data retrieval for non-Access Point (AP) stations due to incomplete link and TID information.
Innovation Solution
The implementation of a multi-link TIM mechanism that combines TIM, link bitmap, and TID bitmap information to efficiently indicate buffered data and recommended links for non-AP stations, allowing for full TID information dissemination and optimized multi-link operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a traditional TIM mechanism is used in multi-link configurations, then the implementation is simpler, but the data retrieval efficiency is reduced due to incomplete link and TID information
Solution Approach 1:
The patent combines the traditional TIM mechanism with link bitmap and TID bitmap information into a unified multi-link TIM structure. This merging allows non-AP stations to receive complete information about buffered data across multiple links and TIDs in a single TIM element, thereby improving data retrieval efficiency without requiring separate signaling mechanisms for each link.
Solution Approach 2:
The patent segments the TIM information by introducing separate link bitmap and TID bitmap fields within the multi-link TIM structure. This segmentation allows the system to provide detailed information about which links have buffered data and which TIDs are associated with each link, enabling more efficient and targeted data retrieval by non-AP stations.
2Productivity
If multi-link TIM information is fully disseminated, then communication efficiency is improved, but the overhead is increased
Solution Approach 1:
The multi-link TIM structure serves multiple functions simultaneously: it indicates buffered data presence (traditional TIM function), identifies specific links with buffered data (link bitmap), and specifies TIDs associated with each link (TID bitmap). This multi-functionality allows complete information dissemination without requiring separate signaling mechanisms, thereby improving communication efficiency while managing overhead through consolidation.
3Adaptability or versatility
If link bitmap and TID bitmap information are added to TIM, then complete information is provided for optimized multi-link operation, but the TIM structure complexity increases
Solution Approach 1:
The patent adds new dimensions to the traditional TIM structure by incorporating link bitmap and TID bitmap fields. These additional dimensions provide granularity at the link level and TID level, enabling optimized multi-link operation and better adaptability. The structured organization of these additional fields manages the complexity increase through systematic information arrangement.
Data Source
AI summary
For example, a beacon, e.g., which may be communicated from an Access point (AP) Multi-Link Device (MLD) to a non-AP MLD, may be configured according to a multi-link Traffic Indication Map (TIM) mechanism. For example, the beacon may include a TIM bitmap including a bit set to “1” to indicate buffered traffic for the non-AP MLD. For example, the beacon may include a link bitmap corresponding to the non-AP MLD. For example, the link bitmap corresponding to the non-AP MLD may include a plurality of bits corresponding to a respective plurality of links for the non-AP MLD. For example, a bit in the link bitmap may be set to “1” to indicate a link for retrieving one or more buffered Bufferable Units (BUs) for the non-AP MLD.