容迟与容断网络中的路由协议

作为一种新型的端到端存储转发网络体系结构,容迟与容断网络(delay and disruption tolerant network)具有间歇连接、频繁割裂、时延极高、非对称的数据速率、较高的误码率、异构互连等特点,传统的Internet、移动Ad Hoc网络和传感网的路由协议难以有效应用在容迟与容断网络中,容迟与容断网络路由面临新的挑战.在简要介绍了容迟与容断网络的基本特性和路由协议设计挑战之后,提出了路由协议评估指标.然后从单播路由、组播路由和选播路由3个方面介绍了容迟与容断网络路由协议的研究进展,最后对主要路由协议进行了综合比较,并指出了未来的研究方向.

Routing Protocols for Delay and Disruption Tolerant Networks

As newly proposed end-to-end, store-and-forward networks, delay and disruption tolerant networks (DTN) are characterized by intermittent connectivity, frequent partitions, extremely high latency, asymmetric data rates, high error rates, heterogeneous interconnection, etc. Hence, traditional routing protocols for Internet, mobile ad hoc networks and wireless sensor networks, are difficult to be applied efficiently in DTN scenarios, and routing in DTN faces many new challenges. After briefly describing the fundamental characteristics of DTN and the major challenges in designing routing protocols, the metrics used to evaluate the DTN routing protocols are proposed. Next, research on routing protocols for DTN is comprehensively summarized and deeply analyzed in this paper, including unicast routing, multicast routing, and anycast routing. Finally, the main routing protocols are compared, and the open issues for the future research are also pointed out to motivate new research and development in the field of DTN.