Extended DRX Paging for RRC Inactive RedCap Terminals
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently supporting reduced capability UEs (RedCap UEs) due to their limited performance, particularly in accessing and obtaining system information from New Radio cells, which is crucial for IoT applications.
Innovation Solution
A method and apparatus for RedCap UEs to receive system information by utilizing search space 0 (SS #0) and control resource set 0 (CORESET #0) in the initial bandwidth part (IBWP) to access and monitor paging occasions, with specific configurations for CORESET and SS indices indicated by a 4-bit index, enabling efficient power management and reduced bandwidth usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If RedCap UEs use standard 5G system information acquisition methods, then they can access New Radio cells, but the process is complex and consumes excessive power for reduced capability terminals
Solution Approach 1:
The patent extracts and utilizes existing system information (MIB and SIB1) that is already broadcast in Search Space 0 and Control Resource Set 0 for RedCap UE access, rather than requiring RedCap UEs to go through the complete standard system information acquisition process. This extraction approach simplifies the access procedure while reducing power consumption.
Solution Approach 2:
The patent makes the existing Search Space 0 and Control Resource Set 0, originally designed for general system information broadcast, serve the additional function of providing access information for RedCap UEs. This multi-functionality eliminates the need for separate information structures, simplifying the process for reduced capability terminals.
2Reliability
If RedCap UEs monitor multiple paging cycles (first and second paging cycles from AMF, third and fourth from base station), then they can receive all relevant paging information, but determining the reference DRX cycle becomes complex
Solution Approach 1:
The patent implements a feedback mechanism where the terminal determines support for extended DRX and feeds back this capability information to the network. The network then provides appropriate paging cycle configurations based on this feedback, simplifying the terminal's task to only monitor the configured reference DRX cycle rather than managing multiple paging cycles independently.
Solution Approach 2:
The patent changes the parameter configuration approach by introducing a reference DRX cycle that consolidates multiple paging cycle parameters. Instead of requiring the terminal to handle four separate paging cycle parameters (first, second, third, and fourth paging cycles), the system transforms these into a unified reference DRX cycle configuration that the terminal simply monitors.
Data Source
AI summary
A method and apparatus for monitoring paging in a mobile communication system are provided. Method for monitoring paging includes receiving a first message including first paging cycle and second paging cycle from the AMF, receiving a second message including third paging cycle and fourth paging cycle from the base station, receiving a system information including an information related to the support of extended DRX, determining a reference DRX cycle and monitoring paging occasion based on the reference DRX cycle.