IEEE 802.11 Multi-Link Synchronization Recovery With Trigger Frames
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Solution Overview
Problem
In Multi-Link communication, when transmission in one link ends early, communication apparatuses that cannot perform parallel transmission and reception lose synchronization, leading to inefficiencies and potential loss of high-quality communication services.
Innovation Solution
A communication apparatus requests assistance for synchronization recovery by transmitting a frame that designates a specific timing for synchronization recovery, allowing the apparatus to maintain high-quality communication by synchronizing multiple wireless links effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If transmission is performed in a plurality of links simultaneously, then communication speed is improved, but synchronization is lost when one link ends early
Solution Approach 1:
The communication apparatus transmits a trigger frame in advance to request synchronization recovery assistance from the other apparatus. This preliminary action allows the system to prepare for synchronization recovery before actual desynchronization occurs, enabling timely intervention to maintain synchronization across multiple links.
Solution Approach 2:
The system establishes a feedback mechanism where the communication apparatus monitors synchronization status across links and sends trigger frames to request assistance when desynchronization is detected. This feedback loop enables dynamic adjustment and recovery of synchronization without waiting for complete failure.
2Reliability
If the communication apparatus waits for a predetermined time after transmission ends, then reception processing can be performed, but communication efficiency is reduced
Solution Approach 1:
Instead of passively waiting for a predetermined time, the communication apparatus actively transmits trigger frames to request synchronization recovery assistance. This preliminary action initiates the recovery process earlier, reducing the waiting time and improving overall communication efficiency while ensuring reliable reception processing.
3Device complexity
If parallel transmission and reception are not executed, then device complexity is reduced, but communication efficiency is limited
Solution Approach 1:
The communication apparatus implements self-service by autonomously monitoring synchronization status and transmitting trigger frames to request assistance when needed. This self-service mechanism enables the system to maintain communication efficiency without requiring complex external synchronization management, balancing device complexity with productivity.
Data Source
AI summary
A communication apparatus for performing wireless communication complying with an IEEE 802.11 standard that performs communication by establishing a first wireless link and a second wireless link with another communication apparatus controls, in a case where transmission of a second frame in the second wireless link ends while transmitting a first frame in the first wireless link in a state in which the communication unit transmits frames so that a first timing at which a frame transmitted in the first wireless link ends is synchronized with a second timing at which a frame transmitted in the second wireless link ends, the communication unit to transmit, to the other communication apparatus in the first wireless link, a predetermined frame that requests assistance for recovery of the synchronization from the other communication apparatus and includes information capable of designating a timing of recovering the synchronization.