A downlink wireless resource allocation algorithm for vehicle-road communication

Abstract

The present invention provides a vehicle-road communication downlink wireless resource allocation system, which includes a service flow input module and a service classifier connected to the service flow input module for classifying the service flow; the service classifier is connected to the first A scheduling module and a second scheduling module, the first scheduling module is used for differentiated scheduling of real-time business flows, and the second scheduling module is used for scheduling non-real-time business flows; the first scheduling module is also connected to the second scheduling module, so that the priority scheduling of real-time Service flow, when the real-time service flow is scheduled and there are remaining wireless resources, start scheduling non-real-time service flow. The algorithm algorithm of the present invention not only satisfies the requirements of channel perception, but also satisfies the delay QoS guarantee of real-time service flow, taking into account the priority of traffic safety-related service flow and the fair scheduling of other concurrent real-time service flows, ensuring throughput and fairness Index and QoS support the balance among the three.

Description

Technical field [0001] The invention belongs to intelligent transportation, and relates to vehicle-to-road communication, and in particular to a TD-LTE-based vehicle-to-road communication downlink wireless resource allocation algorithm. Background technique [0002] Currently, vehicle-to-road communications are mostly based on IEEE 802.11 technology or 2.5G / 3G mobile communication network technology. The coverage of base stations of these communication systems is limited, vehicle-mounted equipment needs to switch roadside equipment frequently, and the network bandwidth does not support parallel real-time transmission of high-quality data. Compared with the above technologies, LTE has larger base station coverage, better spectrum efficiency, and higher transmission rate. my country's TD-LTE has been commercialized. In a typical vehicle-to-road communication system, it can provide practical solutions for the information interaction between people, vehicles and roads in the transpo...

AI Technical Summary

Problems solved by technology

[0006] In view of the problems existing in the prior art, the purpose of the present invention is to provide a TD-LTE-based downlink wireless resource allocation algorithm for vehicle-to-road communication, which solves the problem that the downlink wireless resource allocation algorithm of vehicle-to-road communication in the prior art cannot be used for driving safety. Related data streams are prioritized for scheduling to ensure driving safety; at the same time, it solves the problem that the QoS requirements of other data streams generated during the differential scheduling of real-time data streams are difficult to guarantee; and it also solves the problem of existing The problem that the technology cannot make corresponding supplementary adjustments to the channel after the perceived channel quality changes

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