Managing SCRI Timer Inconsistencies During SRNS Relocation
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Solution Overview
Problem
During serving radio network subsystem (SRNS) relocation and radio link control (RLC) re-establishment procedures in wireless communication systems, the signaling connection release indication (SCRI) message with cause is mishandled due to timer inconsistencies and interruptions, leading to battery inefficiencies and increased network load.
Innovation Solution
A method and system that involve receiving and interpreting reconfiguration messages to manage timers and associated variables, including resetting, restarting, or ceasing timers based on specific conditions, to ensure accurate handling of SCRI messages during SRNS relocation and RLC re-establishment, thereby preventing timer-related issues.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the mobile device continues with the previous timer status during SRNS relocation, then the timer control is simple, but the PS domain signaling connection status mismatches between mobile device and network
Solution Approach 1:
The mobile device checks the UMI message in advance during SRNS relocation to determine whether fast dormancy is supported by the target RNC. Based on this preliminary check, the device proactively adjusts the timer status before initiating SCRI message transmission, preventing status mismatch with the network
Solution Approach 2:
The mobile device uses feedback from the UMI message (which indicates whether the target RNC supports fast dormancy) to dynamically adjust its timer behavior. This feedback mechanism ensures the device's timer status aligns with the network's actual capabilities, resolving the consistency issue
2Use of energy by moving object
If the SCRI message with cause is transmitted during SRNS relocation, then the battery efficiency is improved, but the network load increases due to timer value mismatches
Solution Approach 1:
The mobile device performs preliminary checking of the UMI message during SRNS relocation to determine fast dormancy support status before transmitting SCRI messages. This preliminary action ensures timer values are correctly synchronized, allowing battery-efficient operations without causing network load increases from timer mismatches
3Reliability
If the RLC re-establishment procedure is performed during SRNS relocation, then the connection reliability is improved, but the SCRI message is lost and the mobile device remains in battery inefficient state
Solution Approach 1:
The mobile device maintains continuous monitoring of timer status and fast dormancy support information throughout the RLC re-establishment procedure. This continuous action ensures that when re-establishment completes, the device can immediately resume proper timer control and transition to battery-efficient state, preventing unnecessary delays
Solution Approach 2:
The device uses feedback mechanisms to track the completion status of RLC re-establishment and adjusts its state accordingly. By monitoring whether fast dormancy is supported and maintaining appropriate timer status through the re-establishment process, the device ensures it transitions to battery-efficient state as soon as connection reliability is restored
Data Source
AI summary
A method in a wireless communication system is provided. The method includes receiving a reconfiguration message, and stopping and resetting a timer inhibiting a mobile device from transmitting a signaling connection release indication message while the timer is running and clearing any value associated with the timer if the received reconfiguration message is for radio bearer reconfiguration and a new universal mobile telecommunications system terrestrial radio access network (UTRAN) radio network temporary identifier (U-RNTI) is included.