延迟容忍网络中基于不同转发行为路由策略研究

在延迟容忍网络(DTN)中，大多数已有的路由算法在整个数据传输过程中采用单一的数据转发行为。本文提出了一种基于人类移动模式设计不同数据转发行为的路由策略。该策略将个体移动划分为两种状态：一种是Normal状态，另外一种为Small状态，在Normal状态时，采用三因素标准来严格选取中继节点，在Small状态时，采用小范围洪泛来降低端到端延迟。仿真结果表明该策略与传统策略相比可有效提高路由效率。

A Routing Policy using different forwarding behaviors for Delay Tolerant Networks

In delay-tolerant networks (DTN), most routing algorithms employ a single forward behavior during the entire data transfer process. This paper proposes a routing policy based on human mobility patterns (HMP) that uses two different forwarding behaviors. HMP classifies individual movement as two types: normal movement and small movement. In normal movement, we use three key factors to select strictly-defined relay nodes. In small movement, small flooding behavior is used to reduce end-to-end delay. The simulation results show that HMP improves routing efficiency as compared with traditional schemes.