Terminal Device Sidelink Resource Selection Excluding Network Allocations
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Solution Overview
Problem
In device-to-device (D2D) communication systems, particularly in IoV and NR-V2X, the challenge is to avoid simultaneous transmission of resources allocated by the network and autonomously selected resources by the terminal device, as they do not support simultaneous transmission of both types of resources in the same slot, leading to resource collision and inefficient use of shared resource pools.
Innovation Solution
The terminal device determines a first transmission resource set that excludes resources allocated by the network, allowing it to autonomously select a transmission resource without overlapping with network-allocated resources, and reports this information to the network device to prevent resource collisions, thereby enabling simultaneous operation in both modes without resource conflicts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the terminal device uses both network-allocated resources and autonomously selected resources in the same slot, then the spectral efficiency is improved, but resource collision occurs and transmission reliability deteriorates
Solution Approach 1:
The patent segments the transmission resource selection process into two distinct phases: first, the terminal device determines a first transmission resource set excluding network-allocated resources; second, the terminal device selects a second transmission resource from the first transmission resource set. This segmentation prevents overlap between network-allocated and autonomously selected resources, resolving the resource collision issue while maintaining high spectral efficiency through proper resource utilization.
Solution Approach 2:
The patent applies preliminary action by having the terminal device determine the first transmission resource set before final resource selection. The terminal device proactively identifies and excludes network-allocated resources from the autonomous selection pool, ensuring that no resource collision occurs. This preliminary filtering action enables the terminal to safely utilize both resource types in different slots without interference.
2Ease of operation
If the terminal device autonomously selects transmission resources without excluding network-allocated resources, then the ease of operation is improved, but resource collision occurs and transmission quality deteriorates
Solution Approach 1:
The patent extracts network-allocated resources from the pool of available transmission resources. The terminal device determines a first transmission resource set by removing network-allocated resources from the resource selection window, then performs autonomous selection from the remaining resources. This extraction ensures that autonomous selection does not conflict with network-allocated resources, maintaining both ease of operation and transmission quality.
Solution Approach 2:
The patent introduces an intermediary mechanism in the form of the first transmission resource set, which acts as a mediator between network-allocated resources and autonomously selected resources. This intermediary structure allows the terminal to independently perform autonomous selection while automatically avoiding network-allocated resources, thus ensuring transmission quality without compromising operational ease.
3Reliability
If the terminal device excludes network-allocated resources from autonomous selection, then resource collision is prevented, but the device complexity increases
Solution Approach 1:
The patent merges the resource exclusion logic and selection logic into a unified process. The terminal device determines the first transmission resource set by excluding network-allocated resources, then directly selects from this filtered set. This merging of operations simplifies the overall resource processing complexity while effectively preventing resource collision between network-allocated and autonomously selected resources.
Data Source
AI summary
A method for resource processing is provided. The method includes the following. A terminal device determines a first transmission resource set in a resource selection window. The first transmission resource set does not include a transmission resource in a slot in which a first transmission resource allocated to the terminal device by a network device is located, and a transmission resource in the first transmission resource set is used by the terminal device for transmission of a sidelink (SL) service. Other methods for resource processing and devices are further provided.