Sidelink Resource Sensing for Interference-Aware D2D Allocation
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently managing sidelink resource allocation for device-to-device (D2D) communication, particularly in scenarios where multiple wireless devices need to share resources without causing interference.
Innovation Solution
A method for wireless devices to perform sidelink transmissions by receiving configuration parameters for sensing windows, selecting candidate resources through sensing procedures, and excluding resources based on RSRP, ensuring efficient resource selection and transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple wireless devices share sidelink resources for D2D communication, then resource utilization increases, but interference between devices increases
Solution Approach 1:
The patent performs sensing during a first sensing window before resource selection to identify available resources and predict future resource availability. This preliminary sensing action allows devices to select resources that are less likely to cause interference, resolving the contradiction between high resource utilization and interference reduction.
Solution Approach 2:
The patent implements a feedback mechanism where resource selection is based on sensed RSRP values from other devices. Devices continuously monitor the channel and adjust their resource selection based on this feedback, enabling dynamic avoidance of interfering resources while maintaining high utilization of available resources.
2Measurement precision
If sensing window duration is increased to improve resource selection accuracy, then measurement precision improves, but time consumption increases
Solution Approach 1:
The patent divides the sensing process into two distinct sensing windows: a first sensing window for initial resource selection and a second sensing window for resource re-evaluation. This segmentation allows the system to balance measurement precision and time consumption by performing different types of sensing at different stages rather than using a single long sensing period.
Solution Approach 2:
The first sensing window performs preliminary sensing to identify candidate resources before the actual transmission occurs. This preliminary action captures sufficient channel state information for accurate resource selection without requiring the entire sensing duration to extend through the transmission period, thus reducing overall time loss.
Data Source
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Figure 3
AI summary
A wireless device may select, based on a first sensing procedure, a first candidate resource set for one or more sidelink transmissions. The wireless device may trigger a second sensing procedure, for the one or more sidelink transmissions, based on one or more first resources of the first selected candidate resource set. The wireless device may select, for the one or more sidelink transmissions and based on the second sensing procedure, a second candidate resource set of the first selected candidate resource set. The wireless device may transmit the one or more sidelink transmissions via one or more second resources of the second candidate resource set.