Wireless Extension Link Recovery Without Anchor Link Switchback
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Solution Overview
Problem
Existing wireless communication systems face inefficiencies in recovering lost wireless communication links established via anchor links in different frequency bands, particularly for millimeter wave extension links, often requiring communication switchbacks that incur delays and inefficiencies.
Innovation Solution
Implementing recovery mechanisms such as periodic beacon-based, distributed short beacon-based, STA-initiated fast, and monitored-link flexible procedures to recover millimeter wave extension links directly in the extension band without reverting to anchor links, utilizing training sequences and beacon intervals for efficient link restoration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If link recovery is performed by switching back to anchor links, then network connectivity can be maintained, but link switch delays and waiting times increase
Solution Approach 1:
The patent extracts the link recovery process from the anchor link frequency band and performs it directly in the extension link frequency band. This separation allows the recovery mechanism to operate independently on the extension link without requiring communication switchbacks to anchor links, thereby eliminating the time delay associated with frequency band switching while maintaining network connectivity.
Solution Approach 2:
The patent implements preliminary actions by establishing beamforming training configurations and training sequence parameters in advance during normal operation. When link failure occurs, these pre-configured parameters enable immediate recovery through direct training sequence transmission in the extension band, avoiding the need for time-consuming reconfiguration and anchor link switchbacks.
2Loss of time
If direct link recovery in extension band is implemented, then link switch delays are reduced, but system complexity increases
Solution Approach 1:
The patent creates a universal link recovery mechanism that can operate directly in the extension band using the same training sequence procedures used during initial link establishment. This multi-functional approach reuses existing beamforming training infrastructure and parameters across different frequency bands, reducing the need for separate recovery-specific hardware or protocols and thereby limiting the increase in system complexity.
3Speed
If training sequences are transmitted in extension band for recovery, then recovery speed increases, but energy consumption increases
Solution Approach 1:
The patent applies partial action by transmitting training sequences selectively only when link failure is detected, rather than continuously. The recovery process uses targeted training sequence transmissions in the extension band at specific moments of need, achieving fast recovery speed while minimizing unnecessary energy consumption that would result from continuous or excessive training transmissions.
Data Source
AI summary
This disclosure provides wireless communication methods, components, devices and systems for link recovery in wireless communication networks. Some aspects more specifically relate to the recovery of lost wireless communication links for which initial link establishment has been aided by communications over anchor links of different frequency bands than those of the lost wireless communication links. According to some aspects, a recovery mechanism can be implemented that enables involved devices to recover such “extension” links using communications over their associated frequency bands, without needing to revert to communication over their corresponding anchor links. In some examples, such a recovery mechanism can be implemented to enable recovery of a millimeter wave (mmWave) extension link of a non-standalone mmWave basic service set (BSS) without needing to revert to communication over a sub-7 GHz anchor link.