Multi-Connectivity Link Recovery With Conditional Cell Switching
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing communication networks face inefficiencies in managing conditional handover procedures during radio link failures, leading to increased signaling overhead and delayed recovery times in multi-connectivity scenarios, particularly in dual connectivity scenarios.
Innovation Solution
Implementing a mechanism to control the timing of link failure recovery and conditional cell change procedures, including the use of timers and conditional cell change execution conditions, to optimize the handover process and reduce unnecessary signaling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If conditional cell change procedure is executed during link failure recovery, then connection restoration speed is improved, but signaling overhead increases
Solution Approach 1:
The network pre-configures conditional cell change parameters and candidate target cells before link failure occurs. When failure happens, the UE can immediately execute the pre-prepared cell change without additional signaling for target cell selection, thus speeding up restoration while minimizing signaling overhead.
Solution Approach 2:
The patent implements dynamic timer management where the T316 timer is conditionally stopped or restarted based on whether conditional cell change is configured. This dynamic adjustment optimizes the balance between fast restoration and signaling efficiency by adapting the recovery procedure to the specific configuration state.
2Loss of time
If timer T316 is stopped during conditional cell change, then handover timing is optimized, but recovery procedure complexity increases
Solution Approach 1:
The patent applies different timer management strategies based on the specific configuration scenario. When conditional cell change is configured, timer T316 is stopped to allow seamless handover; when not configured, the timer continues normally. This localized adaptation optimizes handover timing for each scenario without requiring complex universal procedures.
3Adaptability or versatility
If multiple timer values are configured for different scenarios, then procedure adaptability is improved, but device complexity increases
Solution Approach 1:
Multiple timer values are pre-configured by the network based on different scenarios (conditional cell change enabled/disabled, intra-NR or inter-RAT handover). The UE simply selects the appropriate pre-configured value based on the current scenario, achieving high adaptability without requiring complex real-time calculation or selection logic.
Data Source
AI summary
An apparatus for use by a communication element or function configured to conduct a multi-connectivity communication in a communication network in which at least two communication links are used to at least two different cells formed by at least one network element or function for forming a communication path, the apparatus comprising at least one processing circuitry, and at least one memory for storing instructions to be executed by the processing circuitry, wherein the at least one memory and the instructions are configured to, with the at least one processing circuitry, cause the apparatus at least: to determine that a link failure recovery procedure for a first communication link with a first cell is conducted, to detect that a condition for performing a conditional cell change procedure for a second communication link to a second cell is met, which is to be conducted during the link failure recovery procedure for the first communication link, to execute a processing for controlling a timing for conducting at least one of the link failure recovery procedure for the first communication link and the conditional cell change procedure for the second communication link, and to conduct at least one of the link failure recovery process procedure and the conditional cell change procedure according to a result of the processing for controlling the timing.