Remote UE Sidelink Paging With DRX for Low-Power Synchronization
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Solution Overview
Problem
The challenge of efficiently paging remote UEs with low power consumption and synchronization in wireless communication networks, particularly in scenarios involving relaying devices, has not been adequately addressed.
Innovation Solution
Implementing a repetitive discontinuous reception (DRX) scheme for paging messages over sidelink communication between a remote wireless device and a relaying device, allowing for efficient power management and synchronization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If continuous reception monitoring is used for paging messages, then paging reliability is improved, but power consumption increases
Solution Approach 1:
The patent implements discontinuous reception (DRX) cycles where the remote UE periodically wakes up to monitor paging messages on the sidelink and then returns to sleep mode. This periodic monitoring approach maintains paging reliability by ensuring the UE checks for messages at regular intervals while dramatically reducing power consumption compared to continuous monitoring. The network can page the remote UE during these periodic wake-up intervals.
2Use of energy by moving object
If discontinuous reception scheme is used for paging, then power consumption is reduced, but synchronization difficulty increases
Solution Approach 1:
The relaying UE acts as an intermediary between the network and the remote UE for synchronization purposes. The relaying UE maintains synchronization with the network continuously and transfers this synchronization information to the remote UE during their periodic communication intervals. This allows the remote UE to operate in discontinuous reception mode while maintaining proper synchronization through the intermediary relaying UE.
Solution Approach 2:
The system performs preliminary synchronization actions by having the relaying UE establish and maintain synchronization with the network in advance. The synchronization parameters and timing information are prepared and transferred to the remote UE before the remote UE enters sleep mode, enabling the remote UE to quickly resume synchronization upon waking without requiring continuous monitoring.
3Reliability
If direct network connection is used for remote UE, then communication reliability is improved, but coverage area is limited
Solution Approach 1:
The patent introduces a relaying UE as an intermediary device that extends network coverage to remote UEs located in coverage holes or distant areas. The relaying UE, which has a direct connection to the network, forwards communication signals between the network and remote UEs that cannot establish direct connections. This intermediary approach maintains communication reliability while significantly expanding the effective coverage area of the network.
Data Source
AI summary
A method for paging performed by a remote wireless communications device, such as a remote UE. The remote wireless communications device is configured to communicate with a radio access node, via a relaying device, such as a relaying UE. The method comprises monitoring for a paging message on a sidelink between the remote wireless communications device and the relaying device in accordance with a repetitive discontinuous reception scheme, such as a DRX scheme, of the remote wireless communications device. The method may further comprise receiving (904) the paging message on the sidelink in accordance with the repetitive discontinuous reception scheme of the remote wireless communications device.