一种基于QoS的空间延迟/中断容忍网络拥塞控制方法  

QoS Based Congestion Control for Space Delay/Disruption Tolerant Networks

作　　者：时文丰 高德云[1] 周华春[1] 

机构地区：[1]北京交通大学电子信息工程学院,北京100044

出　　处：《电子与信息学报》2016年第11期2982-2986,共5页Journal of Electronics & Information Technology

基　　金：国家863计划(2015AA015702);国家自然科学基金(61271202);国家973计划(2013CB329101)

摘　　要：为缓解网络拥塞对空间延迟/中断容忍网络产生的影响,该文提出一种基于Qo S的网络拥塞控制算法。该算法包括接触拥塞判断和基于Qo S的数据转发两种机制,分别从接触剩余可用容量和节点剩余存储空间两方面对每一段接触的拥塞程度进行预测,将接触划分为不同的拥塞等级。在计算路由时,以整段路径中所包含接触的最高拥塞等级为该路径的拥塞等级,并根据该拥塞等级发送不同优先级的数据。实验表明,基于Qo S的拥塞控制算法可以提高低优先级数据的传递率并在节点存储空间不足时降低最高优先级数据的传递时延。In order to alleviate the influence of network congestion in space delay/disruption tolerant networks, a QoS based congestion control algorithm is proposed in this paper. The algorithm consists of contact congestion forecasting scheme and QoS based data forwarding scheme. The contacts are divided into different congestion levels according to their residual available capacity and nodes＇ storage resource. The congestion level of forwarding path calculated by routing is decided by the highest congestion level of contacts consisted in the path and different priority data will be forwarded according to the path congestion level. Experiment shows that QoS based algorithm could improve the transmission rate of data with lower priority and reduce the delivery delay of highest priority data when the node storage space is insufficient.

关 键 词：空间延迟容忍网络 拥塞控制 路径拥塞等级 基于QoS的转发 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]