Direction-Aware Radio Resource Selection for V2X Sidelink
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Solution Overview
Problem
Current radio resource selection methods for sidelink communication in V2X scenarios face challenges due to high mobility and the complexity of performing beam-based sensing on multiple beams simultaneously, leading to potential interference and reduced system performance.
Innovation Solution
A method for a first device to receive a radio transmission from a third device, determine the expected radio resources and direction of the transmission, and select or transmit a radio resource set based on this information to optimize communication with a second device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If beam-based sensing is performed on multiple beams simultaneously to improve spatial reuse and reduce interference, then the system performance is improved, but the device complexity and difficulty of detecting and measuring increase
Solution Approach 1:
The patent segments the beam-based sensing process by having different devices perform sensing on different beams. Specifically, a first device performs sensing on a first beam while a second device performs sensing on a second beam, dividing the complex multi-beam sensing task across multiple devices rather than requiring one device to handle all beams simultaneously
Solution Approach 2:
The patent introduces a spatial dimension to the resource selection process by considering beam directions. Devices determine directions of received transmissions and use this directional information to select resources, adding the spatial/angular dimension to the traditional frequency-time resource selection
2Productivity
If beamforming techniques are used to steer signal transmission towards intended receivers and avoid interference, then spatial reuse is improved and data throughput increases, but the difficulty of detecting and measuring and device complexity increase
Solution Approach 1:
The patent implements feedback mechanisms where devices transmit indications of their selected resources and beam directions to other devices and network entities. This feedback allows transmitting devices to adjust their beamforming and resource selection based on received interference information, creating a closed-loop system that optimizes throughput while managing complexity
Solution Approach 2:
Devices perform beam-based sensing and determine resource sets before actual data transmission occurs. By pre-selecting resources based on sensed beam conditions and transmitting resource selection indications in advance, the system prepares the beamforming parameters beforehand, reducing the complexity during actual data transmission
Data Source
AI summary
According to an example aspect of the present invention, there is provided a method for a first device, comprising: receiving a first radio transmission from a third device; determining, based on the received first radio transmission, at least one radio resource expected to be used for communication by the third device; determining a first direction from which the first radio transmission from the third device is received at the first device; determining a radio resource set based on the determined at least one radio resource and the determined first direction; and selecting one or more radio resources from the determined radio resource set for communication with a second device or transmitting the determined radio resource set to the second device or a network entity.