D2D Partial Sensing for Low-Latency NR Resource Selection
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently managing resource allocation for device-to-device (D2D) communication, particularly in vehicular communication scenarios like V2X, where full sensing methods are resource-intensive and inefficient, especially in new radio (NR) systems.
Innovation Solution
A partial sensing method and apparatus are introduced to select resources for D2D communication, involving the determination of a selection window based on transmission and reception resource reservation periods, with partial sensing windows, and excluding overlapping resources to optimize resource usage.
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 system complexity and energy consumption increase significantly
Solution Approach 1:
The patent segments the sensing window into multiple sub-windows, where only certain sub-windows require full sensing while others use simplified sensing or random selection. This divides the complex full sensing process into manageable parts, reducing overall system complexity while maintaining reliability in critical resource selection phases.
Solution Approach 2:
The patent applies partial sensing by performing complete sensing only for a portion of the resource selection process (in specific sub-windows), while using simplified methods for other portions. This partial action approach maintains sufficient reliability for resource selection without requiring excessive sensing across all time intervals, thus reducing complexity.
2Reliability
If full sensing is performed for all resource selection, then resource collision is reduced, but latency increases due to extensive sensing requirements
Solution Approach 1:
The sensing window is divided into multiple sub-windows, allowing the system to perform sensing at segmented time intervals rather than continuously. This segmentation enables faster resource selection by only requiring full sensing in specific sub-windows, thereby reducing overall latency while maintaining collision avoidance through targeted sensing.
Solution Approach 2:
The patent implements periodic sensing at specific intervals (in certain sub-windows) rather than continuous sensing. This periodic action reduces the time required for resource selection by performing sensing only at necessary intervals, thus decreasing latency while still effectively avoiding resource collisions through regular monitoring.
3Adaptability or versatility
If transmission resource reservation period is extended, then resource allocation flexibility is improved, but sensing window configuration becomes more complex
Solution Approach 1:
The patent segments the sensing window into multiple sub-windows that can be independently configured. This segmentation allows the system to accommodate extended transmission resource reservation periods by distributing sensing requirements across multiple smaller intervals, thereby maintaining flexibility while simplifying the configuration complexity of each individual sub-window.
Solution Approach 2:
The patent enables dynamic configuration of sensing window parameters (such as sub-window positions and durations) based on the transmission resource reservation period. This dynamic adaptation allows the system to maintain optimal performance across different reservation period lengths without requiring complex static configuration, thus improving flexibility while managing complexity through adaptive behavior.
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.