Sidelink Discovery Resource Pools for Lower UE Power Use
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Solution Overview
Problem
Existing sidelink discovery procedures in 5G NR lack a defined channel, leading to inefficient power consumption due to repeated resource selection and scanning for discovery messages, especially in scenarios involving relay UE selection.
Innovation Solution
Implementing a dedicated discovery resource pool and predefined time periods for sidelink discovery messages, along with MAC layer configurations to prioritize and restrict discovery traffic, allowing UEs to enter power save mode when not in use.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If UEs perform repeated resource selection and scanning for discovery messages in existing sidelink procedures, then discovery coverage is maintained, but power consumption increases
Solution Approach 1:
The network pre-configures UEs with discovery resource pools and associated parameters before sidelink discovery operations. This preliminary configuration enables UEs to efficiently perform discovery by knowing in advance which resources to monitor, eliminating the need for repeated resource selection and reducing scanning overhead, thus maintaining discovery coverage while reducing power consumption
Solution Approach 2:
The patent implements periodic discovery message transmissions and monitoring within predefined resource pools. By establishing regular periodic intervals for discovery operations rather than continuous scanning, the system maintains adequate discovery coverage while allowing UEs to enter power save modes between periodic intervals, significantly reducing overall power consumption
2Reliability
If UEs continuously monitor for discovery messages, then discovery reliability is improved, but battery life decreases
Solution Approach 1:
The system implements periodic monitoring of discovery messages within predefined resource pools rather than continuous monitoring. UEs monitor for discovery messages at scheduled intervals and can enter power save modes between monitoring periods, maintaining adequate discovery reliability while extending battery life by reducing the duration of active reception
Solution Approach 2:
The network autonomously configures discovery resource pools and monitoring parameters for UEs, eliminating the need for UEs to continuously perform resource selection and scanning. This self-service configuration enables UEs to operate more efficiently with reduced battery consumption while maintaining discovery reliability through network-optimized resource allocation
Data Source
AI summary
A user equipment (UE) is configured to transmit a discovery message for a sidelink connection. The UE receives a discovery message configuration, wherein the discovery message configuration includes at least one parameter dedicated to transmitting a discovery message for the second connection, transmits the discovery message as a broadcast and receives a signal from the further UE regarding the discovery message, wherein the second connection is a sidelink connection.