Ad hoc网络中的简单跨层流控机制

Simple Cross-layer Flow Control Scheme in Ad hoc Network

为了提高Ad hoc网络中传输层协议的性能,基于跨层思想设计了一种简单可行的跨层流控机制。该机制结合网络层路由反馈、传输层协议和应用层速率自适应调节,通过跨层信息交互,应用层可根据网络层反馈的路由信息来调节业务的发送速率,将网络负载维持在合理的水平以最大化网络吞吐量。计算机模拟评价表明该机制能改善基于UDP和TCP的业务性能,在网络负载较低的情况下效果尤为明显。

In order to improve performance of transport protocols in Ad hoc network, a simple flow control scheme based on cross-layer idea is designed. This flow control technique integrates routing feedback of network layer, transport protocol and rate adaptive adjustment of application. By exchanging cross-layer information, application can adjust its sending rate according to routing information fed back by network layer, keeping network load at reasonable level to maximize network throughput. The scheme is evaluated by using computer simulation, and simulation results show it can improve performance of services based on UPD and TCP, especially in case of low network load.