NSTR Multi-Link Medium Access Recovery to Reduce Latency
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Medium access recovery procedures in non-simultaneous transmit and receive (NSTR) multi-link devices (MLD) and enhanced multi-link single radio (eMLSR) devices incur unnecessary delays due to medium blindness, affecting latency-sensitive applications like artificial reality systems.
Innovation Solution
Implement techniques to avoid or bypass medium access recovery procedures by decoding portions of received frames to determine synchronization durations, deferring channel access until specific conditions are met, and initiating recovery only when necessary.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If medium access recovery procedure is implemented for NSTR MLD, then channel access reliability is improved, but transmission latency increases
Solution Approach 1:
The patent applies preliminary action by having the first STA decode the legacy preamble of the downlink frame before the medium access recovery procedure is fully executed. This early decoding of duration information (L-SIG field) allows the system to determine the PPDU duration in advance and use this information to optimize the recovery timing, thereby reducing unnecessary delays while maintaining channel access reliability.
Solution Approach 2:
The patent implements dynamics by making the medium access recovery procedure adaptive rather than fixed. The system dynamically adjusts the recovery timing based on real-time conditions - specifically, whether the first STA can successfully decode the legacy preamble and determine the PPDU duration. This dynamic approach allows the system to skip the recovery procedure when conditions permit, reducing latency while maintaining reliability when needed.
2Reliability
If medium access recovery procedure is implemented for eMLSR STA, then channel synchronization is improved, but processing complexity increases
Solution Approach 1:
The patent applies the extraction principle by isolating the critical decoding function to only the legacy preamble (L-SIG field) rather than requiring decoding of the entire frame. This extraction of essential duration information from the preamble alone significantly reduces processing complexity while still providing sufficient data to determine PPDU duration and manage medium access recovery for eMLSR STAs.
Solution Approach 2:
The patent implements partial action by decoding only the necessary portion of the frame (the legacy preamble containing duration information) rather than the entire frame. This partial decoding approach provides sufficient information for medium access recovery while avoiding the excessive processing complexity that would result from full frame decoding, especially important for eMLSR STAs with multiple radios.
3Measurement precision
If full frame decoding is performed, then information accuracy is improved, but processing time increases
Solution Approach 1:
The patent extracts only the essential duration information from the legacy preamble (L-SIG field) rather than decoding the entire frame. This extraction provides accurate PPDU duration information needed for medium access recovery while significantly reducing processing time, as the legacy preamble is much shorter and requires less computational resources than full frame decoding.
Solution Approach 2:
The patent applies partial action by performing decoding only on the necessary portion of the frame (legacy preamble) to obtain duration information. This partial decoding achieves sufficient information accuracy for medium access control without the processing time penalty of full frame decoding, optimizing the trade-off between accuracy and speed.
Data Source
AI summary
A first device within a multi-link device having a plurality of wireless links including a first link and a second link, may include one or more processors configured to receive a first frame on the first link while communicating with a second device for transmission of a second frame on the second link. The one or more processors may decode a portion of the first frame to determine a first duration of no medium access. The one or more processors may determine, a second duration comprising a remaining transmission duration on the second link. The one or more processors may determine whether the first duration is greater than or equal to the second duration. In response to the first duration being greater than or equal to the second duration, the one or more processors may defer channel access on the first link until an end of the first duration.