NR V2X Discontinuous Reception Resource Allocation
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Solution Overview
Problem
In the NR V2X mode, User Equipment (UE) fails to effectively acquire time-frequency resources for transmission due to not considering Discontinuous Reception (DRX) during resource allocation, leading to incomplete sensed information and potential transmission failures.
Innovation Solution
A method that involves receiving information to determine an active time in a time-resource pool, monitoring target signaling in a time-resource sub-pool, and transmitting a radio signal using a parameter set chosen based on measurements in the time-resource sub-pool, with two candidate parameter sets selected based on the sub-pool's length to avoid information incompleteness and improve transmission success.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If UE performs sensing without considering DRX, then sensing speed is improved, but sensed information becomes incomplete leading to transmission failure
Solution Approach 1:
The patent applies preliminary action by having the UE perform sensing operations during the DRX active period before resource allocation decisions are made. The UE senses for available resources in advance (during active time) and stores this information, then uses this pre-acquired information for resource allocation decisions, ensuring both speed and reliability of the sensing process.
2Loss of information
If UE monitors all time-resource pools continuously, then sensed information completeness is improved, but power consumption increases
Solution Approach 1:
The patent applies periodic action by having the UE monitor time-resource pools only during specific active periods defined by DRX configuration. Instead of continuous monitoring, the UE performs periodic sensing during active times when transmissions are expected, and remains in low-power state during inactive periods, thus reducing power consumption while maintaining information completeness.
3Productivity
If UE selects time-frequency resources without DRX consideration, then resource acquisition speed is improved, but transmission reliability deteriorates
Solution Approach 1:
The patent applies preliminary action by performing resource sensing and evaluation during the DRX active period before the actual transmission time. The UE pre-determines suitable time-frequency resources and stores this information, then quickly selects from pre-processed options during transmission, maintaining both speed and reliability of resource acquisition.
Data Source
AI summary
The present disclosure provides a method and device used for wireless communications with discontinuous reception. A first node receives first information, and the first information is used for determining an active time in a first time-resource pool; monitors a target signaling in a first time-resource sub-pool; and transmits a first radio signal in a first time-frequency resource block; wherein a first parameter set is used for determining the first time-frequency resource block, the first time-resource sub-pool belongs to the active time in the first time-resource pool, and the first parameter set is one of a first candidate parameter set or a second candidate parameter set; the first candidate parameter set is determined based on a measurement performed in the first time-resource sub-pool. The present disclosure considers the influence of discontinuous reception on resource election, which can improve chances of successful transmission.