Remote UE Multi-Path Relay Timer Handling Without RRC Re-Establishment
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently managing path switching for multiple paths, particularly in scenarios requiring ultra-reliable and low-latency communications, such as vehicle-to-everything (V2X) applications, where unnecessary re-establishment operations can occur due to timer expiry, leading to inefficiencies.
Innovation Solution
A method and apparatus for operating a remote user equipment (UE) in a wireless communication system that involves transmitting and receiving data, receiving an RRCReconfiguration message for multi-path establishment, and sending an RRCReconfigurationComplete message upon a predetermined timer expiry without performing radio resource control (RRC) re-establishment, thereby avoiding unnecessary re-establishment operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a timer (T304/T420) is used for path switching in multi-path relay, then path switching can be managed with a standardized mechanism, but unnecessary re-establishment operations occur when the timer expires
Solution Approach 1:
The patent changes the parameter of timer expiry handling by introducing a new state (multi-path relay state) that modifies the default behavior. When the timer expires, instead of triggering re-establishment, the system checks whether multi-path relay is configured and maintains the connection if it is, thereby adapting the connection management behavior based on the operational state.
2Productivity
If traditional timer expiry handling is applied, then connection management follows standard procedures, but unnecessary re-establishment operations increase latency and reduce efficiency
Solution Approach 1:
The patent applies preliminary anti-action by pre-configuring the multi-path relay state and associated timer behavior before the timer expires. The system proactively prevents the harmful re-establishment operation from occurring by having the UE recognize the multi-path relay configuration and suppress the default re-establishment trigger when the timer expires, thereby avoiding unnecessary latency.
3Reliability
If re-establishment is performed upon timer expiry, then connection reliability is maintained through standard recovery procedures, but unnecessary operations occur in multi-path relay scenarios
Solution Approach 1:
The patent introduces dynamics by making the timer expiry behavior adaptive rather than static. The system dynamically adjusts the response to timer expiry based on the operational state: in traditional scenarios, re-establishment is triggered; in multi-path relay scenarios, the connection is maintained. This dynamic behavior allows the system to optimize for the specific operational context without adding unnecessary complexity to the overall mechanism.
Data Source
AI summary
An embodiment relates to an operation method of a remote user equipment (UE) related to multi-path relay in a wireless communication system, the method comprising: transmitting or receiving data to or from a base station by the remote UE; receiving an RRCReconfiguration message related to multi-path setup from the base station by the remote UE; and transmitting RRCReconfigurationComplete to the base station by the remote UE, wherein the remote UE initiates a predetermined timer on the basis of the reception of the RRCReconfiguration message and, on the basis of the expiration of the predetermined timer, the remote UE reports the expiration of the predetermined timer to the base station without performing RRC re-establishment.