Interference Reporting and Resource Adjustment in V2X
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Solution Overview
Problem
Existing LTE D2D systems fail to meet the low delay and high reliability requirements of cooperative vehicle-infrastructure communication systems due to limitations in interference management and resource allocation, particularly in scenarios where vehicle nodes move rapidly and experience spatial multiplexing issues.
Innovation Solution
A method and apparatus for reporting interference, which includes receiving interference indication information, determining affected nodes, and adjusting resources based on position information to alleviate interference, allowing for timely resource adjustments and improved spatial multiplexing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If existing LTE D2D resource allocation methods are used, then general fairness and channel utilization are maintained, but low delay and high reliability requirements cannot be satisfied
Solution Approach 1:
The base station proactively allocates different resources to transmitting nodes based on predicted interference relationships before interference actually occurs. By using position information to pre-judge potential interference and assigning orthogonal resources in advance, the system ensures high reliability for safety-critical communications without requiring complex real-time interference management.
Solution Approach 2:
The base station acts as an intermediary that collects position information from transmitting nodes, calculates interference relationships, and coordinates resource allocation. This centralized mediation simplifies the interference management complexity by providing a single point of control that can optimally allocate resources based on global position information.
2Reliability
If resource allocation is adjusted frequently to address interference, then reliability improves, but delay increases
Solution Approach 1:
Resources are allocated based on position information before transmission begins, preventing interference proactively rather than reacting to it. This eliminates the need for frequent post-interference adjustments, thereby maintaining low delay while ensuring high reliability through pre-configured orthogonal resources.
3Measurement precision
If position information is collected and processed, then resource allocation precision improves, but system complexity increases
Solution Approach 1:
The base station serves as an intermediary that centralizes the collection and processing of position information. Transmitting nodes simply report their positions to the base station, which then calculates interference relationships and determines resource allocation. This distributes complexity appropriately, maintaining high measurement precision while avoiding excessive complexity at the node level.
Data Source
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AI summary
Disclosed are an interference reporting and resource adjustment method and apparatus, the method comprising: a node reporting, when determining that there is interference, interference indication information to a base station, wherein the interference indication information comprises: an interfered resource, and a signal to interference and noise ratio; after receiving the interference indication information, the base station determining, when it is determined that there is interference according to the signal to interference and noise ratio, the other nodes using the interfered resource; and adjusting a resource used by the other nodes, so as to avoid interference. By means of the present invention, resource collision can be reduced, so that the resource adjustment efficiency of a communication system is improved, and the requirements for applications with characteristics of low time delay and high reliability can be met.