Vehicle-road communication downlink wireless resource distribution algorithm

Abstract

The invention provides a vehicle-road communication downlink wireless resource distribution system, comprising a business flow input module and a business classifier connected with the business flow input module. The business classifier is used for classifying business flows. The business classifier is connected with a first scheduling module and a second scheduling module. The first scheduling module is used for scheduling real-time business flows in a differentiate manner. The second scheduling module is used for scheduling non-real-time business flows. The first scheduling module is also connected with the second scheduling module, so that the real-time business flows are enabled to have the priority in scheduling. When the real-time business flows are scheduled and wireless resources are surplus, the scheduling of the non-real-time business flows is started. According to the algorithm provided by the invention, channel sensing requirements are met, time delay QoS (Quality of Service) guarantee of the real-time business flow is provided, the priority of business flows related to traffic safety and the fair scheduling of concurrent real-time business flows are both considered, and the balance among the throughput, the fair index and the QoS support is ensured.

Description

technical field [0001] The invention belongs to intelligent transportation and relates to vehicle-road communication, in particular to a TD-LTE-based downlink wireless resource allocation algorithm for vehicle-road communication. Background technique [0002] At present, vehicle-road communication is mostly based on IEEE 802.11 technology or 2.5G / 3G mobile communication network technology. The base stations of these communication systems have limited coverage, vehicle-mounted equipment needs to frequently switch roadside equipment, and 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-road communication system, it can provide a practical solution for the information interaction between people, vehicles and roads in the transportation syste...

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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