DRX Control Unit for Sidelink Resource Sensing
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Solution Overview
Problem
In wireless communication systems, particularly in NR sidelink communication, there is a challenge in reducing power consumption and resource collisions during inter-terminal direct communication, especially when terminals autonomously determine resources for transmission without continuous monitoring.
Innovation Solution
A terminal is equipped with a reception unit for sensing in a resource pool, a control unit for performing Discontinuous Reception (DRX) and determining resources based on sensing results, and a transmission unit for data transmission using the determined resources, with the control unit managing sensing operations during DRX inactivity times based on a chosen sensing method.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If continuous sensing is performed in resource pool, then resource collision is reduced, but power consumption increases
Solution Approach 1:
The patent implements periodic sensing operation where the terminal performs sensing only during specific intervals (on-duration timer periods) rather than continuously. The sensing is scheduled periodically based on DRX configuration, allowing the terminal to switch between active sensing states and sleep states, thus reducing power consumption while maintaining adequate resource collision avoidance through periodic resource pool monitoring.
Solution Approach 2:
The patent dynamically adjusts sensing behavior based on communication state. When a PSCCH signal is detected, the terminal transitions from sleep mode to active sensing mode, performing sensing operations only when necessary. This dynamic adaptation allows the system to balance between power saving during idle periods and reliable resource selection during active communication periods.
2Use of energy by moving object
If DRX is applied for power saving, then power consumption is reduced, but sensing capability during inactivity time is limited
Solution Approach 1:
The patent performs preliminary sensing actions during active periods before entering DRX sleep mode. The terminal senses the resource pool and identifies suitable resources while active, then maintains this resource selection during the subsequent DRX inactivity period. This preliminary action ensures that sensing capability is maintained through prior detection, allowing power saving during inactivity without complete loss of sensing functionality.
Solution Approach 2:
The patent uses feedback from PSCCH signal detection to trigger sensing operations. When a terminal detects a PSCCH signal during DRX operation, it provides feedback that activates sensing in the inactivity period. This feedback mechanism ensures sensing capability is restored when needed, balancing power saving with reliable resource selection based on real-time communication conditions.
Data Source
AI summary
A terminal includes: a reception unit configured to receive a signal from another terminal and to perform sensing in a resource pool; a control unit configured to perform DRX (Discontinuous reception) in the resource pool, and determine a resource to be used for transmission, based on a result of the sensing; and a transmission unit configured to perform data transmission to the another terminal using the determined resource. The control unit determines an operation of sensing in DRX inactivity time, based on a sensing method.