Relay Paging for RRC Status Alignment in Sidelink UEs
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Solution Overview
Problem
Conventional cellular networks face challenges in supporting high data rate services and proximity services due to limitations in aligning Radio Resource Control (RRC) statuses between network devices and remote user equipments (UEs), leading to inefficiencies in data transmission and increased battery consumption.
Innovation Solution
A method and apparatus for aligning RRC statuses by enabling terminal devices to listen to paging messages through relay nodes, allowing them to determine and adjust their RRC states, and release or establish configurations as needed to synchronize with the network device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the network device continuously monitors the RRC status of remote UE, then the RRC status alignment between network device and remote UE is improved, but the battery power consumption of user equipment increases
Solution Approach 1:
The relay UE acts as an intermediary between the network device and remote UE. The relay UE monitors the RRC status of remote UE and communicates this information to the network device, eliminating the need for continuous direct monitoring by the network device and reducing power consumption at the remote UE end.
Solution Approach 2:
The system performs preliminary status indication where the relay UE proactively provides RRC status information to the network device before the network device needs to act on it. This allows the network device to have up-to-date status information without continuous monitoring, reducing energy consumption.
2Reliability
If the network device sends frequent status synchronization messages, then the RRC status alignment is improved, but the data transmission efficiency decreases due to increased signaling overhead
Solution Approach 1:
The relay UE serves as a mediator that consolidates and transmits RRC status information efficiently. Instead of frequent direct communications between network device and remote UE, the relay UE collects status information and communicates it in a optimized manner, reducing signaling overhead and improving data transmission efficiency.
Solution Approach 2:
The system uses partial action by only transmitting RRC status information when changes occur, rather than continuous synchronization. The relay UE monitors status changes and only communicates necessary updates, reducing signaling overhead while maintaining adequate status alignment.
3Reliability
If the remote UE maintains connected state continuously, then the RRC status alignment is improved, but the battery power consumption increases
Solution Approach 1:
The system dynamically adjusts the RRC status of remote UE between connected, inactive, and idle states based on actual communication needs. The relay UE monitors whether communication is required and triggers status transitions accordingly, allowing remote UE to consume less power by entering lower-power states when communication is not needed, while maintaining status alignment through the relay UE's monitoring.
Data Source
AI summary
A communications method and apparatus. The method includes receiving first indication information, where the first indication information indicates the second terminal device to listen to a paging message for the first terminal device, and listening to the paging message sent by the network device for the first terminal device. The first terminal device communicates with the network device by using the second terminal device, and the first terminal device communicates with the second terminal device through a sidelink.