V2X Control Channel Resource Mapping to Reduce Interference
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Solution Overview
Problem
Existing V2X communication technologies face challenges in achieving low-latency data transmission with efficient resource utilization and minimizing interference between terminal devices.
Innovation Solution
A method for coordinating the transmission resources of control and data channels by determining a first frequency domain resource for data channels and a second frequency domain resource for control channels, optimizing their placement to improve demodulation performance and reduce interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If frequency domain resources for control and data channels are independently allocated, then resource allocation flexibility is improved, but interference between channels increases and transmission efficiency decreases
Solution Approach 1:
The patent merges the frequency domain resource allocation of control channels and data channels by establishing a correspondence relationship between their resource sets. The control channel's frequency domain resource is determined based on the data channel's resource, ensuring coordinated allocation that reduces interference while maintaining flexibility through the mapping relationship.
2Productivity
If transmission resources for control and data channels are coordinated, then transmission efficiency is improved, but resource allocation complexity increases
Solution Approach 1:
The patent implements a feedback mechanism where the control channel's frequency domain resource is determined based on the data channel's resource allocation. This feedback-based coordination ensures efficient resource utilization while the systematic approach to resource determination manages complexity through structured resource mapping.
3Loss of time
If low-latency transmission is implemented in V2X communication, then communication responsiveness is improved, but resource utilization efficiency decreases
Solution Approach 1:
The patent applies preliminary action by pre-establishing the correspondence relationship between control channel and data channel frequency domain resources. This pre-coordination of resource allocation enables low-latency transmission while maintaining high resource utilization efficiency through optimized frequency domain resource management.
Data Source
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AI summary
Embodiments of this application provide a communication resource determining method and apparatus, which may be applied to the internet of vehicles, for example, V2X, LTE-V, and V2V, or may be applied to fields such as D2D, intelligent driving, and an intelligent and connected vehicle. The method includes: determining, by a first device, a first frequency domain resource, where the first frequency domain resource is a frequency domain resource occupied by a data channel, and a frequency bandwidth of the first frequency domain resource is N frequency domain units; determining a second frequency domain resource based on a frequency bandwidth of a first channel and the first frequency domain resource, where the frequency bandwidth of the first channel is M frequency domain units, and the second frequency domain resource is a subset of the first frequency domain resource, where M ≤ N, and M and N are positive integers; and sending, by the first device, the first channel on the second frequency domain resource. According to the method and the apparatus, a frequency domain resource of a control channel can be flexibly determined based on a frequency bandwidth, to reduce interference between receivers while ensuring data transmission efficiency.