容迟网络编码节点状态感知的数据转发策略

网络编码能够有效地提高容迟网络(delay tolerant networks,DTNs)的资源利用率,但需根据网络状态及时地调整编码节点的数量。提出一种编码节点状态感知的容迟网络数据转发策略,根据当前网络规模,以分布式的方式估计最优化编码节点数量,然后综合考虑节点社会属性及可用资源,动态选取编码节点,在实现可靠数据转发的同时,保证了较低的开销。仿真结果表明,所提出策略极大地降低了网络负载,并有效提高数据的成功投递率,优化了网络资源。

Coding nodes based state-aware data forwarding strategy for delay tolerant networks

The application of network coding in delay tolerant networks(DTNs) can effectively improve the utilization of network resources, but it needs to adjust the number of coding nodes timely according to the network status. In order to optimize network resources, a data forwarding strategy for DTNs is proposed. According to the current network status, the number of required coding nodes can be estimated with the distributed manner. Moreover, to achieve reliable data forwarding with the lower overhead, the social property and available resources are considered for coding nodes selection. Results show that tour strategy decreases the network overhead ratio and increases the delivery ratio effectively; furthermore, the utilization of network resources is optimized dramatically.