应用层通信任务调度模型

为了提高混合组网环境下的各类气象数据收集和分发效率,研究了通信任务调度问题,根据各类数据传输的时效性要求和可利用的通信资源,提出了一种综合考虑负载均衡和优先权影响的应用层通信任务调度模型(简称LBP模型).该模型以当前可利用通信资源的剩余容量为权值,同时考虑不同业务数据的优先级和通信量要求,按照从高到低的次序选择合适的信道,将并发的数据流量分配到多条通信信道上进行传输,完成数据通信服务,必要时允许抢占.基于LBP模型设计了相应的任务调度器,实验表明该方法能提高现有网络资源的利用率.

Scheduling model for communication task of application layer

To enhance the efficiency of various meteorological data collecting and distributing in mixed networking environment,the scheduling problem of communication task has been researched.According to the time-validity of various meteorological data and available communication resources,a communication task scheduling model worked on application layer is presented,which takes into account both factors,load balance and priority(LBP).This model takes the available residual bandwidth of communication resources as the weight,considers the priority and traffic of the business data,and selects the suitable channel in terms of priorities from high to low.By means of the scheduling method the concurrent data traffic might be distributed to multiple channels and the data transfer service can be finished.Based on the LBP model,a task scheduler is designed,and the performance test is given.