Link Failure Recovery in Wireless Networks
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Solution Overview
Problem
In next-generation wireless networks, when a radio link failure occurs between user equipment and a secondary serving cell, unnecessary information interaction and resource wastage occur due to re-establishment of signaling radio bearers and security activation with the primary serving cell, even if no failure exists between the user equipment and the primary base station.
Innovation Solution
A method and apparatus where the primary base station receives failure report information from the user equipment or secondary base station, acquires necessary identifiers for DRB reconfiguration, and sends reconfiguration messages to the user equipment or secondary base station to reconfigure the DRB without re-establishing signaling radio bearers or security with the primary base station.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the signaling radio bearer is re-established and security is reactivated between user equipment and primary base station when secondary serving cell link fails, then the link failure recovery process is standardized and reliable, but unnecessary information interaction increases and network resources are wasted
Solution Approach 1:
The patent segments the failure recovery process into two distinct paths: one for primary serving cell failures (involving signaling radio bearer re-establishment) and another for secondary serving cell failures (involving only DRB reconfiguration). This segmentation allows the system to apply appropriate recovery actions based on the specific failure type, avoiding unnecessary signaling for secondary cell failures while maintaining reliability for primary cell failures.
Solution Approach 2:
The patent applies different recovery quality characteristics to different failure scenarios. For secondary serving cell failures, a lightweight DRB reconfiguration approach is applied locally without triggering full signaling radio bearer re-establishment. For primary serving cell failures, the complete recovery process with security reactivation is applied. This local quality differentiation resolves the contradiction by matching the recovery intensity to the actual failure severity.
2Ease of operation
If the signaling radio bearer re-establishment process is executed for secondary serving cell failures, then the recovery process follows established procedures, but the complexity of information interaction increases
Solution Approach 1:
The patent segments the recovery procedures into standardized templates: a complete recovery template for primary cell failures and a simplified DRB-only reconfiguration template for secondary cell failures. The network device identifies the failure type and selects the appropriate template, maintaining ease of operation through standardization while reducing complexity by avoiding unnecessary steps in secondary cell failure scenarios.
3Loss of energy
If DRB reconfiguration is performed without signaling radio bearer re-establishment for secondary serving cell failures, then network resource utilization efficiency improves, but the recovery process becomes more complex and less standardized
Solution Approach 1:
The patent implements preliminary action by pre-configuring multiple recovery templates in the network device, each optimized for specific failure scenarios. The appropriate template is selected and executed based on the detected failure type. This preliminary preparation allows the simplified DRB reconfiguration process for secondary cell failures to proceed efficiently without ad-hoc complexity, as the process flow is predetermined and standardized.
Data Source
AI summary
Embodiments of the present disclosure disclose a link failure recovery method and apparatus. The method includes: first receiving, by a primary base station, failure report information sent by a user equipment, acquiring, according to the failure report information, an identifier of a data radio bearer (DRB) that needs to be reconfigured, and reconfiguring a parameter for the DRB that needs to be reconfigured; and then sending, by the primary base station, a first reconfiguration message to the user equipment, so that the user equipment reconfigures a failed DRB according to the first reconfiguration message. The present disclosure is applicable to the field of communications systems.