Inter-UE Coordination Resource Configuration for Sidelink Reliability
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Solution Overview
Problem
Current wireless communication systems, particularly in 5G NR, face challenges in efficiently coordinating sidelink communications between user equipment (UEs) due to resource allocation conflicts and hidden node issues, leading to reduced performance and reliability in autonomous sidelink operations.
Innovation Solution
The implementation of an inter-UE coordination mechanism that allows UEs to transmit and receive inter-UE coordination messages using dedicated or non-dedicated resources, enabling effective resource selection and avoidance of conflicts through suitable or non-suitable resource indication, thereby improving sidelink communication reliability and efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If autonomous sidelink operations are implemented without inter-UE coordination, then device complexity and operation autonomy are improved, but resource allocation conflicts and hidden node issues increase leading to reduced reliability
Solution Approach 1:
The patent introduces an inter-UE coordination message as an intermediary communication mechanism between transmitting and receiving UEs. This message carries resource allocation information and coordination data that mediates the autonomous operations, allowing UEs to share resource usage information and avoid conflicts while maintaining operational autonomy. The coordination message acts as a mediator that resolves hidden node issues and resource conflicts without requiring centralized control.
2Reliability
If dedicated resources are allocated for inter-UE coordination messages, then coordination reliability is improved, but resource overhead and system complexity increase
Solution Approach 1:
The patent enables coordination messages to be transmitted using existing sidelink resources that can serve multiple purposes. The same physical sidelink channels and resource pools used for data transmission are also utilized for coordination message exchange. This multi-functional use of resources allows reliable coordination communication without dedicating separate exclusive resources, thereby reducing resource overhead while maintaining coordination reliability.
3Measurement precision
If inter-UE coordination messages are transmitted frequently, then resource selection accuracy and collision avoidance are improved, but transmission overhead and energy consumption increase
Solution Approach 1:
The patent implements periodic transmission of inter-UE coordination messages at configured intervals rather than continuous or frequent transmission. This periodic action allows UEs to exchange resource allocation information and coordination data at regular intervals, maintaining adequate resource selection accuracy and collision avoidance while significantly reducing the overall transmission overhead and energy consumption compared to frequent continuous messaging.
Data Source
AI summary
Aspects presented herein may enable a UE to transmit or broadcast inter-UE coordination information to one or more UEs based on a set of dedicated-resources or a set of non-dedicated resources. In one aspect, a first UE configures one or more resources in a set of dedicated resources or in a set of non-dedicated resources for a transmission of an inter-UE coordination message, the inter-UE coordination message being associated with at least one of a first stage SCI format or a second stage SCI format. The first UE transmits the inter-UE coordination message via the one or more resources in the set of dedicated resources or in the set of non-dedicated resources.