D2D Resource Pool Sharing in V2X Communication
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Solution Overview
Problem
In vehicle-to-everything (V2X) communication systems, terminal devices using different transmission modes face challenges in selecting appropriate transmission resources and reducing interference in the communication system, particularly with the introduction of shared resource pools in Release-15 of the 3GPP protocol.
Innovation Solution
A method for sharing a resource pool in device-to-device (D2D) communication, where terminal devices receive configuration information and downlink control information from a network device to determine and select a target resource pool for data transmission, allowing devices using different transmission modes to share resources and reduce interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If terminal devices using transmission mode 3 and transmission mode 4 share a resource pool, then resource utilization rate is improved, but interference between different transmission modes increases
Solution Approach 1:
The shared resource pool is segmented into multiple candidate resource pools, and the network device dynamically indicates which specific pool the terminal should use through DCI. This segmentation allows different transmission modes to access different subsets of resources, reducing mutual interference while maintaining overall resource utilization.
Solution Approach 2:
The patent implements dynamic resource pool selection where the network device can flexibly indicate different target resource pools to terminals based on current system conditions, traffic patterns, and interference levels. This dynamic adjustment optimizes the balance between resource utilization and interference management.
2Loss of time
If terminal devices independently select transmission resources, then transmission latency is reduced, but resource selection complexity increases
Solution Approach 1:
The network device acts as an intermediary that provides pre-configured candidate resource pools and dynamically indicates the target pool through DCI. This intermediary approach guides terminal devices in resource selection, reducing the complexity of independent resource selection while maintaining low latency through efficient resource access.
3Adaptability or versatility
If multiple candidate resource pools are configured, then resource selection flexibility is improved, but device complexity for managing multiple pools increases
Solution Approach 1:
The patent extracts the complexity of managing multiple resource pools from the terminal device and places it in the network device. The terminal only needs to receive configuration information and DCI indications, while the network device handles the complex management and selection logic, reducing terminal device complexity while maintaining flexibility.
Data Source
AI summary
Disclosed are a method for sharing a resource pool in device to device (D2D) communication, a terminal device and a network device. The method includes that: a terminal device determines a plurality of candidate resource pools; the terminal device determines a target resource pool of the terminal device for data transmission from the plurality of candidate resource pools according to an indication of a network device; and the terminal device performs the data transmission in the target resource pool. Therefore, the terminal devices using different transmission modes can select appropriate transmission resources for transmitting data and reducing interference in a communication system.