DSRC Resource Allocation via Base Station Intermediary
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Solution Overview
Problem
The existing DSRC technology for vehicle communications suffers from low resource efficiency due to its variable frame length, leading to increased transmission delays, especially in scenarios with high vehicle density, which is inadequate for ensuring safe vehicle communication.
Innovation Solution
A vehicle communications terminal equipped with both a DSRC module and a cellular mobile communications module, connected via an interface, allows for controlled resource allocation through a base station, enabling flexible configuration and congestion control by broadcasting DSRC spectrum parameters and managing resource allocation requests.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If DSRC technology is used for vehicle-to-vehicle communication, then direct wireless communication between vehicles can be implemented, but transmission delay increases beyond 100ms in high-density scenarios
Solution Approach 1:
The patent introduces a base station as an intermediary to manage and coordinate DSRC resource allocation. The base station receives resource allocation requests from vehicle terminals, determines optimal resource allocation, and sends control messages back to terminals. This intermediary coordination mechanism reduces transmission delays in high-density scenarios by preventing contention and optimizing resource distribution across the network.
Solution Approach 2:
The patent dynamically changes resource allocation parameters (such as time slots, frequency channels, and spatial resources) based on network conditions and vehicle density. The base station adjusts these parameters in real-time to optimize communication performance, ensuring that transmission delays remain below 100ms even when vehicle density increases, thereby maintaining communication reliability.
2Adaptability or versatility
If variable frame length is used in DSRC physical layer, then flexibility in data transmission is achieved, but resource efficiency decreases and contention increases
Solution Approach 1:
The patent implements dynamic resource allocation where the base station assigns specific time slots, frequency channels, and spatial resources to different vehicles based on their communication needs. This dynamic assignment allows the system to maintain flexibility in data transmission while improving resource efficiency by preventing waste and reducing contention, as each vehicle receives precisely the resources it needs for its specific transmission requirements.
3Ease of operation
If contention process is required for each data packet transmission, then fair resource access is ensured, but time is wasted and transmission delay increases
Solution Approach 1:
The patent implements preliminary resource allocation where the base station pre-assigns time slots, frequency channels, and spatial resources to vehicles before actual data transmission occurs. This preliminary action eliminates the need for contention processes during actual transmission, as vehicles can immediately use their assigned resources without waiting or competing. The base station continuously monitors and re-allocates resources as needed, maintaining fairness while eliminating contention delays.
Data Source
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AI summary
The present invention is applicable to the field of the Internet of Vehicles, and provides a method for controlling DSRC resource allocation, a base station, and a vehicle communications terminal. The vehicle communications terminal includes a dedicated short range communications DSRC module and a cellular mobile communications module. The DSRC module and the cellular mobile communications module are connected to each other by using an interface. The DSRC module is configured to be in a wireless connection to a DSRC module in another vehicle communications terminal to implement wireless communication between vehicles. The cellular mobile communications module is configured to: receive a resource allocation control message for the DSRC module from a base station, forward the resource allocation control message to the DSRC module by using the interface, and receive a resource allocation request message that is forwarded by the DSRC module to the cellular mobile communications module by using the interface and is therefore sent by the cellular mobile communications module to the base station. According to the present invention, a base station can control a DSRC resource, and flexibly adjust a resource configuration parameter, thereby implementing DSRC congestion control, and adjusting a configuration according to a scenario.