TDLS Discovery Across Multi-Link Radios for Low-Latency WLAN
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Solution Overview
Problem
Existing wireless local area network (WLAN) technologies face challenges in supporting delay-sensitive applications like augmented reality, robotics, and unmanned vehicles due to high latency and low throughput, which are not adequately addressed by conventional single-link operations.
Innovation Solution
Implementing enhanced multi-link multi-radio (EMLMR) operations with non-access point (non-AP) and access point (AP) multi-link devices (MLDs) to establish multiple links, enabling tunneled direct link setup (TDLS) discovery processes through sequential frame transmissions across multiple radio links.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional single-link operation is used, then device complexity is reduced, but throughput is insufficient and latency is high
Solution Approach 1:
The patent segments the wireless communication system into multiple independent links between non-AP MLD and AP MLD, where each link can operate autonomously. This segmentation allows parallel data transmission across multiple links, thereby increasing overall throughput while managing complexity through modular link management.
Solution Approach 2:
The patent transitions from single-link operation to multi-link operation by adding the dimension of multiple simultaneous communication paths. This dimensional expansion enables parallel frame exchanges across different links, significantly improving throughput and reducing latency for delay-sensitive applications.
2Loss of time
If conventional single-link operation is used, then system simplicity is maintained, but latency is high for delay-sensitive applications
Solution Approach 1:
By segmenting communication into multiple parallel links, the patent enables simultaneous frame exchanges, thereby reducing the time required for data transmission. This segmentation allows delay-sensitive applications to utilize multiple paths concurrently, minimizing overall latency.
Solution Approach 2:
The patent ensures continuous useful action by maintaining multiple active links that can operate simultaneously without interruption. This continuity allows parallel processing of data frames across links, eliminating idle time and reducing latency for time-critical applications.
3Reliability
If TDLS discovery is performed on a single link, then channel access is simplified, but discovery reliability is low when peer STA is not responding
Solution Approach 1:
The patent segments the TDLS discovery process into multiple independent attempts across different links. If discovery fails on one link, the process continues on other links, thereby improving reliability through diversified discovery paths while managing complexity through structured sequential execution.
Solution Approach 2:
The patent performs preliminary actions by attempting TDLS discovery on multiple links in sequence before concluding failure. This preliminary exploration across multiple channels increases the probability of successful discovery by exploiting alternative paths before giving up.
4Productivity
If multiple links are established for parallel communication, then throughput increases, but coordination complexity increases
Solution Approach 1:
The patent segments the multi-link system into independent link units that can operate autonomously for frame exchanges. This segmentation simplifies coordination by allowing each link to function independently while contributing to overall throughput, reducing the complexity of inter-link coordination.
Data Source
AI summary
A wireless communication network includes an access point (AP) multi-link device (MLD) and a non-AP MLD. In an enhanced multi-link multi-radio (EMLMR) mode, a non-AP MLD may sequentially transmit one or more TDLS discovery request frames to an AP MLD to discover a TDLS peer STA via different EMLMR links. The AP MLD may transmit an initial frame via an EMLMR link to trigger TDLS discovery request frame from the non-AP MLD.