Multi-Carrier Resource Pool Configuration for V2V Half-Duplex Constraints
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Solution Overview
Problem
Current V2V communication technologies face challenges with half-duplex constraints, leading to detection latency and reliability issues, which are inadequate for the high reliability and low latency requirements of 5G Internet of Vehicles, especially in scenarios with high vehicle density.
Innovation Solution
A communication method and apparatus that configures multiple carriers and resource pools for inter-terminal communication, allowing terminals to send and receive messages on multiple resource units based on determined operation modes, thereby overcoming half-duplex constraints and improving message detection reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If time-frequency hopping is used to resolve half-duplex constraint, then terminals can discover each other, but discovery latency increases and depends on period duration
Solution Approach 1:
The patent segments the communication resources by dividing them into multiple resource pools associated with different carriers. Each resource pool contains resource units that can be independently allocated to terminals. This segmentation allows terminals to simultaneously transmit on one carrier and receive on another carrier, eliminating the half-duplex constraint without requiring time-frequency hopping, thus reducing discovery latency while maintaining detection reliability.
2Reliability
If multiple carriers are configured for inter-terminal communication, then half-duplex constraint is overcome and message detection reliability improves, but device complexity increases
Solution Approach 1:
The patent introduces a network device as an intermediary that centrally manages and configures multiple carriers and resource pools for inter-terminal communication. The network device assigns specific resource pools to different terminals and coordinates their usage, allowing terminals to operate on multiple carriers without directly managing the complexity of carrier configuration themselves. This intermediary approach enables reliable message detection across multiple carriers while distributing the complexity management to the network infrastructure.
Data Source
AI summary
Embodiments of the present invention disclose a communication method and a communications apparatus. In the communication method, a network-side device determines a resource configuration policy. The network-side device determines an operation mode of a terminal based on the resource configuration policy; broadcasts information about a plurality of configured resource pools and the operation mode, so that the terminal performs sending based on the configured one or more resource pools; and determines, based on the operation mode, that the terminal sends information on one or more resource units of the plurality of resource pools. According to the communication method and the communications apparatus provided in the specific embodiments of the present invention, the one or more resource pools are configured for a plurality of carriers for inter-terminal communication, so that the terminal can send a message on the one or more resource pools of the plurality of carriers.