Sidelink Frequency Resource Selection for IoV Bandwidth Efficiency
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Solution Overview
Problem
Current communication systems for Internet of Vehicles face challenges in efficiently managing bandwidth, leading to high terminal device performance requirements and potential waste of resources, as terminals cannot occupy the maximum 400 MHz bandwidth simultaneously and must support a wide range of frequencies, which increases costs and reduces performance.
Innovation Solution
A sidelink communication method that allows terminal devices to dynamically adjust and select frequency domain resources, such as Bandwidth Parts (BWP) or carriers, based on current traffic volume and service requirements, enabling adaptive bandwidth allocation and efficient resource utilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If all terminals are required to support the maximum 400 MHz bandwidth, then the system can provide sufficient bandwidth for sidelink communication, but the performance requirements on terminals become high, increasing UE cost
Solution Approach 1:
The 400 MHz bandwidth is segmented into multiple Bandwidth Parts (BWPs), each with different bandwidth sizes (e.g., 5 MHz, 10 MHz, 20 MHz, 40 MHz, 80 MHz, 160 MHz, 320 MHz). Terminals can be allocated specific BWPs based on their capabilities and service requirements, rather than requiring all terminals to support the full 400 MHz bandwidth. This segmentation allows cost-effective terminals to operate with smaller bandwidths while still providing options for high-performance terminals that need larger bandwidths.
Solution Approach 2:
The system dynamically changes the bandwidth parameter by configuring different BWP sizes and positions for different terminals or different time periods. A terminal can be switched between different BWPs based on traffic conditions and service requirements, allowing the bandwidth parameter to be adjusted without changing the terminal's hardware capabilities. This enables terminals to operate at optimal performance levels for their specific needs.
2Adaptability or versatility
If a terminal uses a sampling rate corresponding to the 400 MHz bandwidth, then the terminal can handle maximum bandwidth, but there is waste of performance when the terminal cannot occupy the entire bandwidth
Solution Approach 1:
The system implements dynamic BWP configuration where the terminal's active bandwidth is adjusted in real-time based on current service requirements and traffic conditions. Instead of using a fixed high sampling rate corresponding to 400 MHz, the terminal dynamically switches between different BWP configurations with appropriate sampling rates. This dynamic adaptation ensures the terminal uses only the necessary performance level for current needs, eliminating performance waste while maintaining the capability to handle maximum bandwidth when required.
3Ease of operation
If terminals are allocated fixed bandwidth resources, then resource allocation is simple, but resource utilization efficiency decreases when traffic volume varies
Solution Approach 1:
The system uses dynamic BWP configuration to adjust the bandwidth resources allocated to terminals based on real-time traffic conditions and service requirements. When traffic volume is low, terminals are configured with smaller BWPs to reduce resource consumption. When traffic volume increases or service requirements change, terminals can be switched to larger BWPs to meet the increased demand. This dynamic approach maintains relatively simple allocation procedures while significantly improving resource utilization efficiency compared to fixed bandwidth allocation.
Data Source
AI summary
A sidelink communication method includes: obtaining, by a first terminal device, at least one frequency domain resource of the first terminal device which is used for sidelink communication; and determining, by the first terminal device, a first frequency domain resource from the at least one frequency domain resource.