NR Sidelink Partial Sensing for Efficient D2D Resource Allocation
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Solution Overview
Problem
Existing wireless communication systems lack a detailed solution for resource allocation in device-to-device (D2D) communication, particularly in the new radio (NR) system, which is essential for vehicle-to-everything (V2X) services, and there is a need for efficient partial sensing methods to select and configure resources for sidelink data transmission.
Innovation Solution
A partial sensing method and device for D2D communication that involves receiving sidelink control information, determining exclusion candidates, and excluding overlapping resources from the sensing procedure to efficiently allocate resources in the NR sidelink.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If full sensing method is used for resource selection in D2D communication, then resource allocation reliability is improved, but device complexity and energy consumption increase
Solution Approach 1:
The sensing procedure is segmented into two distinct methods: full sensing for high reliability scenarios and partial sensing for reduced complexity scenarios. The patent divides the resource pool into sensing resources and non-sensing resources, allowing UEs to select appropriate sensing depth based on service requirements, thus resolving the contradiction between reliability and complexity.
Solution Approach 2:
The patent introduces partial sensing as a compromise between full sensing and no sensing. Instead of requiring complete sensing of all resources, partial sensing examines only a subset of resources based on priority levels and service types, reducing device complexity while maintaining adequate resource allocation reliability for critical communications.
2Measurement precision
If full sensing procedure is performed for all resources, then resource selection accuracy is improved, but energy consumption and time delay increase
Solution Approach 1:
The patent segments resources into priority-based categories (high priority, medium priority, low priority) and applies different sensing depths to each category. High priority resources receive comprehensive sensing for accurate selection, while lower priority resources use reduced sensing, thereby maintaining overall accuracy while significantly reducing energy consumption.
Solution Approach 2:
Different sensing precision levels are applied to different resource regions based on local requirements. Critical resources requiring high reliability (e.g., safety-related V2X communications) receive full sensing with high measurement precision, while non-critical resources use partial sensing, optimizing the balance between accuracy and energy usage across the resource pool.
3Reliability
If comprehensive sensing of all resources is performed, then resource allocation reliability is improved, but communication latency increases
Solution Approach 1:
The patent performs preliminary classification of resources into priority categories before the actual sensing process. By pre-identifying high-priority resources that require comprehensive sensing, the system focuses sensing efforts only where needed, reducing overall sensing time while maintaining reliability for critical communications.
Solution Approach 2:
Instead of uniformly sensing all resources comprehensively, the patent applies partial sensing to non-critical resources and full sensing only to critical resources. This selective approach maintains resource allocation reliability for time-sensitive communications while minimizing unnecessary sensing time delays for less urgent transmissions.
Data Source
AI summary
The present disclosure relates to a method and device for determining a resource to be sensed for device-to-device (D2D) communication in a wireless communication system. A method of performing sensing for device-to-device (D2D) communication in a wireless communication system according to an aspect of the present disclosure may include receiving, by a first user equipment (UE), sidelink control information (SCI) in slot m; determining a first exclusion candidate based on a reception power measurement value of a data channel corresponding to the SCI; determining slot m+Gap in which the same data as in the slot m is transmitted; determining a second exclusion candidate based on the slot m+Gap; excluding a resource in which the first and second exclusion candidates and a candidate to be sensed overlap from a resource to be sensed; and performing sensing on the resource to be sensed.