Radio Link Detection for Secondary Path Switching
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Solution Overview
Problem
Existing communication technologies result in unnecessary Radio Resource Control (RRC) reestablishment processes and terminal devices falling into an idle state when a radio link fails, leading to disrupted communication.
Innovation Solution
A method and apparatus that detect a second radio link's quality if the first radio link fails, allowing communication to continue over the second link without performing RRC reestablishment on the first link, thereby reducing unnecessary processes and maintaining normal operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the terminal device performs RRC reestablishment when the first radio link fails, then the terminal device attempts to restore communication, but this results in unnecessary RRC reestablishment processes and may cause the terminal device to fall into an idle state
Solution Approach 1:
The terminal device pre-configures a second radio link with the same access network device before the first radio link fails. When failure is detected, the device can immediately switch to the pre-configured second link without initiating RRC reestablishment, thus avoiding unnecessary protocol overhead and state transitions while maintaining communication reliability
Solution Approach 2:
The second radio link serves as an intermediary communication path between the terminal device and the access network device. When the first link fails, this alternative path enables continuous communication without requiring the device to enter idle state or perform complex reestablishment procedures
2Reliability
If the terminal device switches to RRC idle state when the first radio link fails, then the terminal device protects itself from communication errors, but this disrupts normal communication operation
Solution Approach 1:
The terminal device pre-configures a second radio link that can immediately take over when the first link fails. This preliminary preparation eliminates the need to switch to idle state, thereby maintaining both communication reliability and continuous operation without disruption
Solution Approach 2:
The terminal device changes the communication parameter from using the first radio link to using the second radio link when failure is detected. This parameter switch enables the device to maintain connected state and continuous communication while preserving reliability by avoiding the failed link
Data Source
AI summary
A link detection method and an apparatus are provided. The link detection method includes: determining that a first radio link to an access network device fails; detecting a second radio link to the access network device, to determine whether the second radio link fails; and if determining that the second radio link does not fail, communicating with the access network device over the second radio link. If it is determined that the first radio link fails, the second radio link may be further detected. If the second radio link does not fail, the second radio link may continue to be used in communication, and RRC reestablishment does not need to be performed on the first radio link. This reduces an unnecessary RRC reestablishment process, and a terminal device does not need to fall back to an RRC idle state, so that the terminal device can continue to work normally.