Relay Reselection Timer for Sidelink Path Failure Recovery
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In sidelink-based relay communication, existing technologies face challenges in robust and efficient relay selection and service continuity, particularly when an established multi-hop path fails, leading to disturbances during relay reselection and potential loss of end-to-end protocol contexts.
Innovation Solution
A method for relay reselection is introduced, where a UE activates a timer upon detecting a failed path, transmits a discovery message, and inactivates the timer upon receiving an acceptance message, allowing for the reestablishment of a new path while maintaining end-to-end protocol contexts to ensure service continuity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If relay reselection is performed when a path fails, then service continuity is improved, but protocol context loss occurs during reselection
Solution Approach 1:
The patent applies preliminary action by starting a timer immediately when path failure is detected, before the actual relay reselection process begins. This timer prepares the system to handle protocol context preservation by establishing a time-bound window for reselection operations, ensuring that context information is maintained throughout the reselection process rather than being lost.
Solution Approach 2:
The patent uses an intermediary mechanism in the form of a timer that mediates between path failure detection and relay reselection execution. This timer acts as a buffer that allows the system to transition smoothly from the failed path state to the reselection state while preserving protocol contexts, preventing direct context loss that would occur without this intermediate timing mechanism.
2Reliability
If timer-based relay reselection is implemented, then data continuity is improved, but device complexity increases
Solution Approach 1:
The patent applies parameter changes by introducing a timer with specific duration parameters that control the relay reselection process. By adjusting timer values and states (active/inactive), the system manages data continuity without requiring complex architectural changes. The timer parameter serves as a simple control mechanism that orchestrates the reselection process while maintaining data flow.
3Productivity
If discovery messages are transmitted during reselection, then relay selection efficiency is improved, but message loss occurs when path is failed
Solution Approach 1:
The patent applies preliminary anti-action by using the timer to prevent premature transmission of discovery messages when the communication path is still in a failed state. The timer ensures that discovery messages are only transmitted after the system is ready to receive and process them, counteracting the potential harm of message loss that would occur if messages were sent during an active path failure condition.
Data Source
AI summary
The present disclosure relates to a method and apparatus for relay transmission. The method is performed by a first UE. The method comprises activating a first timer after a first path to a second UE determined as failed; transmitting a first discovery message; and inactivating the first timer upon receipt of a first acceptation message responsive to the first discovery message.