Millimeter-Wave Sidelink Resource Selection for Fast Beam Sweeping
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Solution Overview
Problem
Current vehicle-to-everything (V2X) technologies primarily using the sub-6G frequency band struggle to meet the demands of ultra-large throughput, ultra-low latency, and ultra-high reliability, and lack support for sidelink millimeter wave communications, which are essential for future autonomous driving and high-mobility environments.
Innovation Solution
A resource selection method and apparatus for beam sweeping in the millimeter wave frequency band, enabling fast beam alignment and communication link establishment by determining a candidate resource set, selecting a transmission resource, and transmitting a beam sweeping channel to another device, with feedback mechanisms for beam power measurement and reporting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If sub-6G frequency band is used for V2X communication, then device complexity is reduced, but throughput and reliability are insufficient for future autonomous driving requirements
Solution Approach 1:
The patent transitions from sub-6G frequency band to millimeter wave frequency band (30-300 GHz), changing the fundamental operating parameter to achieve ultra-large throughput and ultra-high reliability required for future V2X applications
2Productivity
If millimeter wave frequency band is used, then throughput and reliability are improved, but propagation loss increases due to short wavelength
Solution Approach 1:
The patent adds a spatial dimension to the traditional two-dimensional time-frequency resource allocation by introducing beam dimension. This enables directional transmission and reception, concentrating energy in specific directions to overcome propagation loss while maintaining high throughput
Solution Approach 2:
The patent implements dynamic beam adjustment mechanisms where devices can switch between different beams based on channel conditions, mobility state, and traffic requirements, allowing the system to adapt to changing propagation conditions in real-time
3Loss of energy
If beam-based communication is implemented, then propagation loss is compensated through directional beams, but resource selection complexity increases due to added beam dimension
Solution Approach 1:
The patent segments the resource selection process into distinct phases: initial beam sweeping to establish beam pairs, followed by resource selection within the selected beam dimension. This segmentation simplifies the overall complexity by breaking down the three-dimensional resource selection into manageable steps
Solution Approach 2:
The patent performs preliminary beam sweeping and beam pair establishment before resource selection. By pre-determining the optimal beam dimension, the system reduces the complexity of subsequent resource allocation decisions, as devices only need to select resources within the already-established beam context
4Reliability
If beam sweeping is performed for beam alignment, then communication link establishment is improved, but time consumption increases
Solution Approach 1:
The patent implements periodic beam sweeping where devices systematically cycle through different beam directions in a predetermined sequence. This periodic structure allows for efficient beam alignment by covering all necessary directions in a time-efficient manner, balancing thoroughness with speed
Solution Approach 2:
The patent employs partial beam sweeping strategies where devices perform beam sweeping only when necessary (e.g., when channel conditions change or connections need re-establishment) rather than continuously. This reduces time consumption while maintaining reliable link establishment when needed
Data Source
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AI summary
The present application relates to the technical field of communications, and provides a resource selection method and apparatus, and a device. The method comprises: determining a first candidate resource set for beam scanning; selecting a first transmission resource in the first candidate resource set; and sending a beam scanning channel to a second device on the first transmission resource.