Sidelink Resource Selection Aligned With DRX Active Periods
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Solution Overview
Problem
The continuous monitoring of resources in sidelink communication systems for vehicle-mounted devices leads to high energy consumption, and the introduction of Discontinuous Reception (DRX) mechanisms can result in transmission performance issues due to terminals being in dormant states when data is sent.
Innovation Solution
A resource selection method that considers the Discontinuous Reception (DRX) configuration information of receiving devices to optimize resource selection, ensuring data transmission occurs during active DRX periods, thereby improving system performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If continuous monitoring is performed to ensure reliable data reception, then transmission reliability is improved, but energy consumption increases
Solution Approach 1:
The patent implements Discontinuous Reception (DRX) mechanism where terminals periodically switch between active monitoring states and dormant states. The network device configures DRX parameters including active time, inactivity timer, and cycle length, allowing terminals to monitor resources only during designated active periods rather than continuously, thus reducing energy consumption while maintaining reliable data reception through periodic monitoring.
2Use of energy by moving object
If DRX mechanism is introduced to reduce energy consumption, then terminal power usage is reduced, but transmission performance deteriorates due to dormant states
Solution Approach 1:
The network device performs preliminary configuration of DRX parameters before actual data transmission. By pre-configuring active time windows, inactivity timers, and cycle lengths, the network ensures that terminals are in active states when data needs to be transmitted, preventing performance degradation. The network can also pre-schedule resource allocations during active periods to ensure timely delivery.
Solution Approach 2:
The patent incorporates feedback mechanisms where the network device monitors terminal states and adjusts DRX configurations dynamically. Based on feedback about data arrival patterns, channel conditions, and terminal responsiveness, the network optimizes DRX parameters to balance power savings with transmission performance, ensuring terminals remain active when data is available while maximizing energy savings during idle periods.
3Device complexity
If resource selection ignores DRX configuration, then resource allocation is simplified, but data transmission may occur during dormant periods causing transmission failures
Solution Approach 1:
The network device acts as an intermediary that coordinates resource selection with terminal DRX states. Rather than requiring terminals to independently track multiple DRX configurations or perform complex timing calculations, the network device configures resource allocations that align with terminal active periods. This intermediary coordination simplifies the overall system complexity while ensuring transmissions occur only when terminals are in active states, maintaining high reliability.
Data Source
AI summary
The present application provides a resource selection method and a device, for use in sidelink communication. In a resource selection process, one or more resources used for sidelink transmission are selected according to DRX configuration information of one or more second devices, and sidelink data may be transmitted on the selected one or more resources.