Sidelink Resource Selection Using AI and DRX Coordination
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Solution Overview
Problem
Conventional sidelink communication systems face challenges such as half-duplex problems, hidden-node issues, and resource collisions, particularly in mode-2 resource selection, and the introduction of discontinuous reception (DRX) technology complicates resource selection by requiring consideration of multiple terminal devices' DRX configurations and assistance information (AI).
Innovation Solution
A method for sidelink communication where a terminal device receives AI from other devices and determines a target terminal device and/or transmission resources based on the received AI and DRX configurations to optimize resource selection, using predefined rules and conditions to improve communication efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If terminal devices autonomously select resources from a resource pool (mode-2), then spectrum efficiency and transmission delay are improved, but resource collision and hidden-node problems occur
Solution Approach 1:
The patent implements a terminal coordination mechanism where terminals exchange assistance information (AI) containing resource selection criteria, channel state information, and reception status. This feedback loop enables coordinated resource selection, reducing collisions while maintaining autonomous mode-2 operation efficiency
Solution Approach 2:
The patent introduces assistance information as an intermediary medium between terminals. This AI carries coordination data that mediates resource selection decisions, allowing terminals to make informed autonomous choices without direct network control, thus resolving the contradiction between autonomy and coordination
2Use of energy by moving object
If discontinuous reception (DRX) technology is introduced to save energy, then energy efficiency is improved, but resource selection complexity increases
Solution Approach 1:
The patent applies preliminary action by having transmitting terminals send assistance information about their DRX configurations and resource preferences in advance. Receiving terminals use this pre-provided information to make coordinated resource selections during their active DRX periods, simplifying real-time decision-making while maintaining energy efficiency
Solution Approach 2:
The patent uses feedback mechanisms where terminals share DRX configuration information and reception status. This enables receiving terminals to predict when transmitting terminals will be active, reducing resource selection complexity by eliminating the need for continuous monitoring and complex real-time coordination
3Measurement precision
If assistance information from multiple terminals is collected, then coordination accuracy is improved, but information processing complexity increases
Solution Approach 1:
The patent extracts and prioritizes only the most critical elements from assistance information, such as resource selection criteria, channel state indicators, and reception status. By focusing on essential data rather than processing all available information, terminals achieve accurate coordination while minimizing processing complexity
Solution Approach 2:
The patent applies local quality by having terminals selectively process assistance information based on their specific needs and current state. Each terminal extracts and processes only the relevant portions of AI from other terminals, rather than uniformly processing all information, thus reducing overall system complexity while maintaining coordination accuracy
Data Source
AI summary
A method for sidelink (SL) communication is provided. The method includes the following. A terminal device receives assistance information (AI) transmitted by one or more other terminal devices. The terminal device determines a target terminal device and/or a transmission resource used for SL message transmission based on at least one of: the received AI, or a discontinuous reception (DRX) configuration of each other terminal device.