Extended eDRX Cycle Configuration for Reduced Capability UEs
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Solution Overview
Problem
Current 5G mobile communication systems face challenges in efficiently managing reduced capability user equipment (UE) with limited bandwidth and energy constraints, particularly in supporting extended discontinuous reception (eDRX) beyond 10.24 seconds, which affects paging monitoring operations in radio resource control (RRC) inactive modes.
Innovation Solution
A method where a UE and a base station exchange capability messages to support eDRX longer than 10.24 seconds, allowing for optimized paging monitoring operations by determining and configuring appropriate eDRX cycles and release messages to enhance energy efficiency and performance in RRC inactive states.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If extended eDRX cycles longer than 10.24 seconds are implemented in RRC inactive mode, then energy efficiency is improved, but device complexity increases due to capability management requirements
Solution Approach 1:
The patent changes the DRX cycle parameter from the standard maximum of 10.24 seconds to extended values (20.48 seconds, 40.96 seconds, 81.92 seconds, or 163.84 seconds) specifically for RRC inactive mode. This parameter extension allows reduced capability UEs to achieve better energy efficiency by sleeping longer between paging monitoring occasions, directly resolving the energy consumption issue while maintaining manageable complexity through standardized parameter sets.
2Adaptability or versatility
If reduced capability UEs support extended eDRX cycles, then operational capabilities are enhanced, but communication efficiency deteriorates due to longer paging intervals
Solution Approach 1:
The patent applies local quality by implementing extended eDRX cycles specifically for reduced capability UEs in RRC inactive mode, rather than universally. The base station identifies reduced capability UEs through capability messages and configures extended DRX parameters only for these devices. This allows enhanced operational capabilities for target devices while maintaining standard communication efficiency for other UEs, resolving the contradiction through selective application.
3Duration of action of stationary object
If extended eDRX cycles are configured for RRC inactive UEs, then battery life is extended, but paging monitoring reliability may deteriorate
Solution Approach 1:
The patent implements dynamic eDRX cycle configuration where the base station can adaptively select from multiple extended cycle options (20.48s, 40.96s, 81.92s, 163.84s) based on UE capability, network conditions, and service requirements. The configuration is not fixed but can be adjusted through RRC release messages and subsequent updates, allowing the system to optimize between battery life extension and paging monitoring reliability in different scenarios.
Data Source
AI summary
The disclosure relates to a 5G or 6G communication system to support a data transmission rate higher than before. The disclosure provides a method performed by a user equipment (UE) in a wireless communication system. The method comprises receiving, from a base station, a UE capability request message, transmitting, to the base station, a UE capability message including first information indicating support of an extended discontinuous reception (eDRX), which is longer than 10.24 seconds, in a radio resource control (RRC) inactive, receiving, from the base station, a radio resource control (RRC) release message including paging information determined based on the first information indicating support of the eDRX longer than 10.24 seconds, and performing, based on the paging information included in the RRC release message, a paging monitoring operation in the RRC inactive.