Relay UE Paging Coordination Using DRX for Remote UE Reception
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently providing services due to the increased demand for high-speed data and the need for flexible air-interface designs to support diverse UE capabilities and use cases, particularly in 5G networks operating at higher frequencies, where beamforming and MIMO techniques are employed to mitigate propagation loss and increase transmission distance.
Innovation Solution
A method and apparatus for determining reference signal availability and transmitting/receiving paging messages by relay UE, involving the identification of paging occasions based on DRX cycles, offsets, and search spaces, using DCI via PDCCH addressed to P-RNTI, to facilitate efficient communication between base stations and remote UEs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If relay UE monitors paging for remote UE continuously, then reliability of paging reception is improved, but power consumption increases
Solution Approach 1:
The relay UE monitors paging messages periodically based on DRX (Discontinuous Reception) cycles rather than continuously. The network configures paging cycles that allow the relay UE to wake up at specific intervals to check for paging messages for remote UEs, then go back to sleep mode. This periodic monitoring maintains reliable paging reception while significantly reducing power consumption compared to continuous monitoring.
2Adaptability or versatility
If paging configuration includes multiple parameters (DRX cycle, offset, search space), then adaptability to different UE capabilities is improved, but device complexity increases
Solution Approach 1:
The paging configuration structure is designed to be universal and applicable to multiple types of UEs (direct UEs and remote UEs via relay UEs) with different capabilities. The same configuration framework handles various scenarios including different DRX cycles, offsets, and search spaces without requiring separate complex configurations for each UE type. This multi-functional approach maintains adaptability while managing complexity through a unified design.
3Ease of operation
If relay UE transmits paging configuration to remote UE, then ease of operation is improved, but loss of information may occur
Solution Approach 1:
The system implements feedback mechanisms where the relay UE receives acknowledgment and status information from the remote UE after transmitting paging configurations. This feedback loop ensures that the paging information is accurately transmitted and received, allowing the network to verify information integrity and adjust configurations if necessary, thereby preventing information loss while maintaining operational simplicity.
Data Source
AI summary
In an exemplary embodiment, a method performed by a relay user equipment (UE) in a wireless communication system is provided. The method comprising: receiving, from a base station (BS), a paging configuration including at least one of a number of total paging frame, a number of paging occasion for a paging frame, an offset for paging frame, a first DRX cycle of a remote UE, or paging search space; transmitting, to a remote UE, the paging configuration; receiving, from the remote UE, information related the remote UE including at least one of identity of the remote UE, paging identity of the remote UE or a second DRX cycle of the remote UE; identifying a paging occasion of the remote UE based on the information related the remote UE and the paging configuration; and monitoring the paging occasion of the remote UE for receiving a paging message for the remote UE.