Multi-Link Error Recovery Timing Management
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Solution Overview
Problem
Multi-link devices face interference issues during simultaneous transmission and reception due to transmission power leakage, limiting their ability to support simultaneous operations on multiple links and degrading network performance when recovering from transmission failures on primary links.
Innovation Solution
Implementing a method that manages the timing of synchronous transmissions on secondary links to avoid interference during error recovery, including terminating secondary TXOPs upon detecting failures on primary links, performing backoff procedures, and aligning PPDU transmissions to minimize in-device coexistence interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multi-link devices operate on multiple bands concurrently to increase bandwidth, then network throughput is improved, but in-device coexistence interference occurs due to transmission power leaking between links
Solution Approach 1:
The patent segments the multi-link operation into primary link and secondary link roles, with the primary link handling data transmission and the secondary link providing recovery capability. This segmentation allows the system to manage interference by controlling which link operates at which power level and when transmissions occur, thereby maintaining throughput while reducing IDC interference.
Solution Approach 2:
The patent implements preliminary error detection and recovery mechanisms by establishing a secondary link that is pre-configured to provide recovery capability. Before transmission failures occur, the system sets up the secondary link with appropriate power levels and timing constraints, enabling proactive interference management and reliable error recovery without compromising primary link performance.
2Productivity
If a secondary wireless link is used only when a primary wireless link is in use, then link aggregation efficiency is improved, but network performance degrades when transmission failure occurs on the primary link
Solution Approach 1:
The patent introduces the secondary link as an intermediary for error recovery operations. When transmission failure occurs on the primary link, the secondary link acts as a mediator to receive and process recovery transmissions without causing interference to the primary link, thereby maintaining both link aggregation efficiency and reliable error recovery performance.
Solution Approach 2:
The patent applies preliminary anti-action by implementing timing constraints and power level controls on the secondary link before transmission failures occur. These pre-established constraints prevent the secondary link from interfering with primary link recovery operations, ensuring that error recovery performance is maintained while preserving link aggregation efficiency during normal operation.
3Adaptability or versatility
If simultaneous transmission and reception is enabled on multiple links, then communication flexibility is improved, but transmission power leakage causes interference between links
Solution Approach 1:
The patent applies local quality by assigning different operational characteristics to different links: the primary link operates with higher power levels and data transmission priority, while the secondary link operates with controlled power levels and timing constraints to provide recovery capability. This localized differentiation allows simultaneous operation on multiple links while minimizing power leakage interference through link-specific parameter optimization.
Data Source
AI summary
Embodiments of the present invention provide improved multi-link operation over for recovering from a transmission failure on a primary link. During synchronous transmission on the NSTR pair of links, a transmission failure of an MPDU may happen on either link of the NSTR pair of links. Error recovery can be performed when an AP MLD is operating on the NSTR pair of links. When a transmission failure is detected, error recovery can be performed, and the timing of a synchronous transmission on the other wireless link can be managed to advantageously avoid IDC interference and improve performance of the wireless network.