AP-Coordinated P2P Transmission for NSTR Multi-Link WLANs
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Multi-link devices (MLDs) with non-simultaneous transmit and receive (NSTR) restrictions face performance degradation due to simultaneous operation of multiple links, leading to inefficient peer-to-peer (P2P) transmission in wireless local area networks (WLANs).
Innovation Solution
A wireless communication method involving an access point (AP) that determines a non-AP station (STA) for P2P transmission, utilizing a triggered TXOP sharing mechanism and synchronous transmission to manage link resources and reduce interference, especially for MLDs with NSTR link pairs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple links operate simultaneously in an MLD, then channel utilization and transmission opportunities increase, but interference and reception failures occur due to NSTR restrictions
Solution Approach 1:
The patent implements dynamic link management where the MLD alternates between transmitting and receiving on different links based on real-time conditions. The system dynamically selects which link to use for P2P transmission by evaluating NSTR restriction status, ensuring that transmission and reception operations are properly sequenced to avoid interference while maximizing channel utilization.
Solution Approach 2:
The patent introduces an intermediary mechanism through the AP that coordinates and manages P2P transmission between MLDs. The AP acts as a mediator that receives P2P traffic from one MLD and forwards it to the destination MLD, enabling reliable communication while the initiating MLD enters sleep mode to avoid NSTR conflicts. This intermediary approach allows the system to achieve both high productivity and reliability.
2Speed
If the initiating MLD remains active during P2P transmission, then response speed is fast, but energy consumption increases unnecessarily
Solution Approach 1:
The patent extracts the P2P transmission function from the initiating MLD by having the AP assume this role. The initiating MLD sends data to the AP, which then handles the transmission to the destination MLD. This allows the initiating MLD to enter sleep mode after sending data, extracting the continuous active transmission requirement and thereby reducing energy consumption while maintaining acceptable response speeds through the AP's intervention.
Solution Approach 2:
The patent implements preliminary action by having the initiating MLD send data to the AP in advance before entering sleep mode. The AP stores this data and transmits it to the destination MLD when appropriate, allowing the initiating MLD to be pre-active only when necessary to send data, rather than remaining continuously active. This preliminary transmission approach reduces overall energy consumption while maintaining response capability.
3Device complexity
If P2P transmission uses direct MLD-to-MLD communication, then channel overhead is reduced, but NSTR restrictions cause transmission failures
Solution Approach 1:
The patent introduces the AP as an intermediary in the P2P transmission path between MLDs. Instead of direct MLD-to-MLD communication that would be blocked by NSTR restrictions, the AP receives data from the initiating MLD and forwards it to the destination MLD. This intermediary approach adds some channel overhead but ensures transmission reliability by avoiding NSTR conflicts, as the AP is not subject to the same restriction constraints.
Data Source
AI summary
A wireless communication method includes that: an access point (AP) determines a second non-access point (non-AP) station (STA). The second non-AP STA is a receiver device that is to perform a peer-to-peer (P2P) transmission with a first non-AP STA. A non-access point station and an access point are also provided.