Multi-Link Capability Negotiation for Efficient WLAN Link Selection
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Solution Overview
Problem
Existing wireless local area network (WLAN) technologies face challenges in optimizing communication efficiency through multi-link capabilities, particularly in the context of emerging standards like IEEE 802.11be (EHT), where efficient link selection and negotiation are lacking.
Innovation Solution
A method for stations (STAs) to negotiate multi-link capabilities by exchanging channel information and link selection details with access points (APs), allowing for optimal link utilization in multi-link transmission/reception.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multi-link capabilities are implemented without standardized negotiation methods, then communication flexibility and potential throughput are improved, but device complexity and implementation difficulty increase
Solution Approach 1:
The capability negotiation process is segmented into distinct phases: capability advertisement in beacon/probe frames, capability response in association requests, and link selection based on negotiated parameters. This segmentation allows each device to process multi-link information in manageable steps rather than handling all complexity simultaneously.
Solution Approach 2:
Capability negotiation is performed in advance during the association phase, before actual data transmission begins. The AP and STA exchange capability information frames to pre-establish which links are available and what features are supported, so that subsequent data transmission can proceed without real-time negotiation overhead.
2Measurement precision
If comprehensive capability information is exchanged between AP and STA, then link selection accuracy and communication optimization are improved, but information overhead and negotiation time increase
Solution Approach 1:
The capability information is extracted and organized into specific field structures within existing IEEE 802.11 management frames. Rather than creating entirely new communication protocols, the patent extracts capability data into structured elements that can be carried within standard beacon, probe, and association frames, minimizing additional overhead.
Solution Approach 2:
The capability negotiation mechanism is designed to work across multiple IEEE 802.11 standards and frame types. The same capability information structure can be used in beacon frames for broadcast negotiation, probe frames for directed negotiation, and association frames for confirmation, making the system universally applicable without requiring separate protocols for different scenarios.
Data Source
AI summary
In a wireless local area network (LAN) system, a station (STA) receives, from an access point (AP), channel information related to a multilink, and the channel information may include link identifier information of a plurality of links included in the multilink. The STA transmits, to the AP, link selection information on the basis of the channel information, and the link selection information may include information related to whether the STA can use each of the plurality of links, and information related to whether the STA uses each of the plurality of links for data transmission.