Remote UE RRC Relay Timer Configuration for PC5 Connection
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Solution Overview
Problem
There is a need for a procedure and timer for performing RRC connection through a relay UE by a remote UE in sidelink communication, as existing methods may improperly consider RRC connection failures due to insufficient time allocation for relay UE connection.
Innovation Solution
The remote UE selects a relay UE, establishes a PC5 connection, and transmits a message related to RRC connection with a base station, using timers that differ from those used in direct RRC connection procedures, including a second timer with a larger value to ensure adequate time for relay UE connection establishment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the remote UE uses the same timer as direct RRC connection procedure, then the timer value is kept simple and consistent, but the RRC connection may be improperly considered failed due to insufficient time for relay UE connection establishment
Solution Approach 1:
The patent applies local quality by configuring different timer values for different connection scenarios. Specifically, when a relay UE is selected, a first timer value is used, while when no relay UE is selected, a second timer value is used. This allows the system to optimize timer settings for each specific situation rather than using a single generic value, thereby improving connection reliability without excessive overall complexity.
Solution Approach 2:
The patent implements dynamics by making the timer value adaptive based on the connection scenario. The timer configuration changes dynamically depending on whether a relay UE is selected or not. This dynamic adjustment ensures that the timer is appropriately sized for the actual connection establishment time requirements in each scenario, preventing premature connection failure detection.
2Duration of action of moving object
If a larger timer value is used for relay UE connection, then sufficient time is ensured for connection establishment, but the time for other operations may be reduced
Solution Approach 1:
The patent segments the timer configuration into different scenarios: a first timer value for relay UE connection and a second timer value for direct connection. This segmentation allows each timer to be optimized for its specific purpose without affecting the other scenarios, thus ensuring sufficient time for relay connection while preventing time loss in other operations through appropriate timer selection.
Data Source
AI summary
An embodiment relates to an operation method of a remote user equipment (UE) in a wireless communication system, including selecting a relay UE by the remote UE, establishing PC5 connection with the relay UE by the remote UE, and transmitting a message related to Radio Resource Control (RRC) connection to the relay UE by the remote UE, and in this case, the remote UE initiates one or more timers related to RRC connection with a base station (BS), and the one or more timers are different from a first timer used when the remote UE performs a direct RRC connection procedure with the BS.