Multilink Capability Negotiation for WLAN Link Selection
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Solution Overview
Problem
Existing wireless local area network (WLAN) systems 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 in WLAN systems, then communication efficiency is improved, but device complexity increases
Solution Approach 1:
The patent segments the communication system into multiple independent links, each with its own capability negotiation process. The AP and STA negotiate capabilities separately for each link identifier, allowing the system to achieve high multi-link productivity while managing complexity through modular, link-by-link negotiation rather than treating the entire multi-link system as a single complex entity.
2Productivity
If link selection information is exchanged between AP and STA, then optimal link utilization is achieved, but information exchange overhead increases
Solution Approach 1:
The patent extracts link selection information as a distinct element from the overall capability negotiation. The AP transmits channel information including link identifiers, and the STA responds with link selection information indicating preferred links. This extracted information exchange mechanism enables optimal link utilization while minimizing overhead by only transmitting essential link selection data rather than redundant capability information.
Solution Approach 2:
The capability negotiation including link selection occurs during the association phase, before actual data transmission begins. By performing the information exchange about link preferences and capabilities in advance, the system establishes optimal link configurations beforehand, eliminating the need for continuous information exchange during data transmission and thus reducing overall information overhead.
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.