Partial Sensing Windows for Reliable NR D2D Resource Selection
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently selecting resources for device-to-device (D2D) communication, particularly in new radio (NR) systems, due to constraints in channel environments and the need for improved resource allocation methods to support vehicular communication services like autonomous driving and augmented reality.
Innovation Solution
A partial sensing method is introduced, where a sensing window is determined based on transmission and reception resource reservation periods, allowing for the exclusion of overlapping resources and enabling efficient selection of resources for D2D communication, including the configuration of first and second sensing windows for full and partial sensing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If full sensing is performed for resource selection in D2D communication, then resource allocation reliability is improved, but sensing overhead and complexity increase
Solution Approach 1:
The patent divides the sensing window into multiple sub-windows (first sensing window and second sensing window) with different sensing requirements. The first sensing window uses full sensing for reliable resource selection, while the second sensing window uses partial sensing to reduce overhead. This segmentation allows the system to balance between reliability and complexity by applying different sensing strategies to different time periods.
Solution Approach 2:
The patent implements partial sensing in the second sensing window where not all resources are fully sensed. Instead of performing complete sensing on every resource candidate, the system performs selective sensing on a subset of resources, reducing the overall sensing overhead while still maintaining acceptable resource allocation reliability through the combination of full and partial sensing results.
2Manufacturing precision
If sensing window is extended to improve resource selection accuracy, then resource allocation precision is improved, but time consumption increases
Solution Approach 1:
The sensing window is segmented into multiple sub-windows with different durations and sensing depths. The first sensing window has a shorter duration with full sensing for immediate resource selection, while the second sensing window extends further in time but uses partial sensing. This segmentation allows the system to achieve good resource selection accuracy without requiring the entire extended window to be fully sensed, thus reducing total sensing time.
Solution Approach 2:
In the extended second sensing window, the system performs partial sensing rather than complete sensing on all resources. This means that while the sensing window is extended to provide more resource candidates and improve selection accuracy, the actual sensing effort is reduced by only partially sensing the resources in this extended period, thereby limiting the time consumption increase.
3Reliability
If resource reservation period is increased to support vehicular services, then service reliability is improved, but resource allocation flexibility decreases
Solution Approach 1:
The patent implements dynamic resource reservation where the resource reservation period can be adjusted based on service requirements and channel conditions. The system supports both long reservation periods for reliable vehicular services and shorter periods for flexible resource allocation. This dynamic approach allows the same D2D communication system to adapt to different service scenarios, maintaining service reliability when needed while preserving allocation flexibility when conditions allow.
Data Source
AI summary
The present disclosure relates to a partial sensing method and apparatus for device-to-device (D2D) communication in a wireless communication system. Disclosed is a method of selecting a resource for D2D communication based on partial sensing in a wireless communication system, the method including receiving a transmission resource reservation period and a reception resource reservation period from a base station through upper layer signaling; determining a selection window; determining a sensing window for partial sensing based on the selection window, based on the transmission resource reservation period; excluding an overlapping resource through sensing in the determined sensing window; and performing transmission by selecting a resource for transmitting control information and data in the selection window based on the excluded resource information. The reception resource reservation period received through upper layer signaling may be set to a limited value based on the transmission resource reservation period.