Extended DRX Paging for System Information Updates
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current wireless communication systems face challenges in efficiently transmitting system information with an extended Discontinuous Reception (DRX) cycle, leading to unnecessary power consumption and potential delays in acquiring updated system information.
Innovation Solution
A method and apparatus for a user equipment (UE) configured with an extended DRX (eDRX) cycle, where the UE receives a paging message indicating system information modification within an active time, determines whether to receive the updated information by comparing the active time with the modification period, and only receives the system information in the next modification period when necessary, thereby optimizing power usage and reducing unnecessary data acquisition.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the UE continuously monitors system information updates, then the system information is always up-to-date, but power consumption increases
Solution Approach 1:
The UE employs extended DRX cycles to periodically wake up and check for system information updates instead of continuous monitoring. The UE wakes up at specific intervals defined by the eDRX cycle length, checks for paging messages indicating SI modifications, and returns to sleep mode, thereby significantly reducing power consumption while maintaining update awareness.
Solution Approach 2:
The network autonomously notifies the UE of system information modifications through paging messages containing SI modification indicators. The UE does not need to actively query for updates but instead passively receives notifications, reducing its operational burden and power consumption while ensuring it receives updates promptly.
2Loss of time
If the UE wakes up frequently to check for system information updates, then update timeliness is improved, but battery life decreases
Solution Approach 1:
The extended DRX mechanism establishes longer periodic wake-up intervals for checking system information updates. Instead of frequent short-interval wake-ups, the UE wakes up less frequently but at predictable intervals, reducing overall battery consumption while maintaining acceptable update timeliness through the periodic nature of the checks.
3Reliability
If the UE monitors every modification period, then no system information updates are missed, but unnecessary data acquisition occurs
Solution Approach 1:
The solution extracts only the essential notification signal (paging message with SI modification indicator) from the complete system information transmission process. The UE monitors for this specific indicator rather than acquiring the entire system information data, allowing it to detect updates without unnecessarily downloading full SI data when no changes exist.
Solution Approach 2:
The network provides feedback to the UE through paging messages that indicate whether system information has been modified. This feedback mechanism allows the UE to make informed decisions about whether to acquire updated system information, avoiding unnecessary data acquisition when the feedback indicates no changes.
Data Source
AI summary
The present specification proposes a method for receiving system information by a user equipment (UE) configured with an extended discontinuous reception (eDRX) in a wireless communication system. Specifically, the method includes the step of receiving a paging message including an indicator indicating system information modification in a modification period within an active time of the eDRX; determining whether to receive the system information by comparing the active time with the modification period; and receiving the system information in a next modification period when it is determined to receive the system information.