Sidelink Resource Coordination During DRX Active Time
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Solution Overview
Problem
Current sidelink communication systems face issues with high interference and transmission failures due to terminal devices autonomously selecting resources from pre-configured pools, leading to reduced transmission performance.
Innovation Solution
A sidelink communication method involving terminal devices exchanging assistance information to indicate preferred, non-preferred, or conflicting resources, particularly during active times of discontinuous reception (DRX) operations, to enhance resource selection coordination.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If terminal devices autonomously select resources from pre-configured pools, then device complexity and ease of operation are improved, but transmission reliability deteriorates due to high interference and transmission failures
Solution Approach 1:
The patent implements a feedback mechanism where terminal devices exchange assistance information indicating preferred and non-preferred resources. The receiving terminal provides feedback about resources it prefers or avoids, and the transmitting terminal uses this feedback to select transmission resources, thereby reducing interference and improving reliability while maintaining autonomous operation
Solution Approach 2:
The patent introduces assistance information as an intermediary element that mediates resource selection between terminals. This intermediary carries preference indicators that guide resource selection without requiring direct network control, resolving the contradiction between autonomous operation and reliable transmission
2Device complexity
If terminal devices autonomously select resources from pre-configured pools, then device complexity is reduced, but transmission performance deteriorates due to large interference
Solution Approach 1:
Terminals exchange feedback information about preferred and non-preferred resources, allowing each terminal to adjust its resource selection to avoid interference with others while maintaining simple autonomous operation
Solution Approach 2:
The patent changes the parameter space by introducing preference indicators in assistance information. Terminals select resources based on these preference parameters rather than random selection, reducing interference while keeping the selection process simple
3Use of energy by moving object
If assistance information is transmitted outside active time of DRX operation, then energy consumption is reduced, but transmission reliability deteriorates due to missed information
Solution Approach 1:
The patent schedules assistance information transmission to occur during the active time of DRX operation, which is predetermined and planned in advance. This ensures the receiving terminal is awake and ready to receive the information, guaranteeing reliable delivery without requiring continuous operation
Solution Approach 2:
The patent aligns assistance information transmission with the periodic active time intervals of DRX operation. By transmitting during these predetermined periodic windows when the terminal is naturally active, the system ensures reliable reception while maintaining energy-efficient discontinuous operation
Data Source
AI summary
Provided in the embodiments of the present disclosure are a sidelink communication method and a communication device. The method includes transmitting, by a first terminal device, assistance information to a second terminal device in a first time interval, wherein the assistance information is configured to indicate a resource set, and the resource set comprises one or more of: a resource preferred by the first terminal device, a resource not preferred by the first terminal device or a conflicting resource; wherein the first time interval is in an active time of a discontinous reception (DRX) operation of the second terminal device.