Multi-Link Coordination for Avoiding NSTR Wireless Link Pairs
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Solution Overview
Problem
In multi-link operation (MLO) wireless systems, the formation of non-simultaneous transmission and reception (NSTR) link pairs between stations and access points reduces the effectiveness of communication links, as existing solutions like signaling a doze state are inadequate for periodic peer-to-peer (P2P) traffic.
Innovation Solution
A station indicates the existence of P2P links and the associated time periods to an access point (AP), allowing the AP to avoid forming NSTR link pairs by directing the station to alternative channels using enhanced Target Wake Time (TWT) mechanisms.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a station establishes multiple communication links for multi-link operation, then communication bandwidth and data throughput are improved, but the risk of forming NSTR link pairs increases which reduces link effectiveness
Solution Approach 1:
The station performs preliminary actions by indicating P2P link establishment and associated time periods to the AP before NSTR conflicts occur. The AP uses this advance information to pre-coordinate channel assignments and prevent NSTR link pair formation, ensuring link effectiveness is maintained while allowing multiple communication links to operate for high throughput.
2Productivity
If the station operates on P2P links during specific time periods, then peer-to-peer communication efficiency is improved, but NSTR link pairs may form causing interference and reducing overall system performance
Solution Approach 1:
The station provides feedback to the AP by indicating P2P link establishment and time periods. The AP uses this feedback to adjust channel assignments and coordinate transmissions, preventing NSTR interference while maintaining P2P communication efficiency. The feedback mechanism enables continuous optimization of link configurations.
3Adaptability or versatility
If the AP allows stations to establish multiple links without coordination, then network flexibility and adaptability are improved, but channel congestion and ineffective link pairs increase
Solution Approach 1:
The AP acts as an intermediary that coordinates between stations establishing multiple links. By receiving P2P link indication information and managing channel assignments centrally, the AP enables network flexibility while preventing channel congestion and NSTR conflicts, thus reducing overall system complexity despite allowing multiple links.
Data Source
AI summary
Certain aspects of the present disclosure provide a method for wireless communication at a first station. The method generally includes establishing at least one communication link with a second station and transmitting, to a first MLD, an indication of the communication link and a time period in which the first station will operate on the communication link.