一种节点权重自适应调整的DTN拥塞控制  

An adaptive role-based congestion control for DTN

作　　者：陶勇[1,2] 龚正虎[2] 

机构地区：[1]国家行政学院电子政务研究中心,北京100089 [2]国防科学技术大学计算机学院,湖南长沙410073

出　　处：《计算机工程与科学》2013年第1期52-56,共5页Computer Engineering & Science

基　　金：国家自然科学基金资助项目(60973127);湖南省自然科学基金资助项目(09JJ3123)

摘　　要：由于部署、位置等原因,DTN中各均质节点在通信中的角色和作用存在差异,采取保管传输通信模式,热点区域的节点会因缓存过早耗尽而导致网络拥塞。提出了一种考虑节点自身作用的路由算法ARBR,每个节点根据网络负载状况,自主调整自身权重参数,各节点仅接收优先级不低于自身的节点数据,从而有效利用网络局部连通性,对网络中关键节点的流量进行抑制。仿真结果表明,ARBR缓解了瓶颈节点拥塞,利用随机连接的通信机会,有效提高了网络吞吐率。Homogeneous nodes in DTN are different in the role and contribution in the communica- tion, as the deployment of location and other reasons. As a result of the custody transfer mode of com- munication, the hotspot node buffer is prematurely exhausted, leading to congestion. In this paper, we present an Adaptive Role-Based Routing （ARBR） algorithm. With it, each node adjusts the priority pa- rameters itself according to the network load condition and only receives the data from those nodes with equal or larger priority, so the local connectivity is effectively used and the traffic near the key nodes can be suppressed. Simulation results show that, the ARBR can effectively alleviate the bottleneck node congestion, make full use of the random connection communication opportunities and improve the net- work throughput.

关 键 词：容迟容断网络 多路径路由 拥塞控制 节点优先级 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]