基于代理的空间信息网多业务路由研究与仿真

发布时间：2018-01-07 04:37

本文关键词：基于代理的空间信息网多业务路由研究与仿真　出处：《东北大学》2014年硕士论文　论文类型：学位论文

【摘要】：随着卫星技术的迅速发展和应用,以卫星系统为核心的空间信息技术在政治、经济、军事等领域的战略地位日趋提高,为人们的生活及工作和带来了许多的便利,与国家利益联系日益紧密。空间信息网具备高动态变化的拓扑、长传输时延、节点的星上负荷及资源处理能力有限、严重的时延抖动等特点。路由技术作为组网技术的核心,当具有不同类型的业务需要传送时,能够满足不同业务的区分服务路由技术面临巨大挑战。由移动代理部署进行采集,交互路由信息,动态更新和维护路由表。在此基础上设计并实现多业务路由协议。方案包括路由发现、路由选择、路由维护三部分。依据业务的需求分为QOS业务(时延敏感、带宽敏感)和非QOS业务(尽最大努力交付型)。首先路由发现定义了以上不同类型业务的参数,根据应用的需求,针对时延敏感业务、带宽敏感业务、尽最大努力交付型等业务,寻找满足应用要求的且链路代价较小的路径；其次,针对QOS路由选择满足条件的多条路径中最优路径,动态调整路由,并为高QOS要求的特殊业务设计带宽预留机制,非QOS路由则选择满足要求的多条路径,实现通信过程负载均衡,降低网络的拥塞。可实现具备自配置、自适应及负载均衡能力的高效路由；最后,针对网络出现故障导致路由不可用时,采取主动维护路由方式。当有业务发送到节点时,故障节点拒绝接收消息并发给移动代理一个错误消息标识,移动代理根据之前的路由缓存进行截短路由或完全重路由。采用NS2网络模拟软件对所设计的算法仿真测试。验证算法的有效性和抗毁性。仿真结果表明,基于代理的空间信息网多业务路由方案能够适应网络状况,满足不同业务的服务质量需求,实现通信过程负载均衡,提高路由容错性,降低网络的拥塞,且在端到端时延、平均归一化吞吐量、节能、网络吞吐率等方面具有良好的性能。
[Abstract]:With the rapid development and application of satellite technology, spatial information technology in satellite system as the core in the political, economic, military and other fields of strategic position increasingly improved, has brought a lot of convenience for people's life and work and, more closely with national interests. The topological space information network with high dynamic, long transmission time delay, limited load and resource processing capacity of nodes on the satellite, the delay jitter characteristics seriously. Routing technology as the core network technology, when having different types of business needs to be transmitted, can satisfy the DiffServ routing technology industry service is facing enormous challenges. The deployment of mobile agents to collect routing information, interactive, dynamic update and maintain the routing table. On the basis of the design and implementation of multi service routing protocol scheme including routing discovery, routing and routing maintenance. The three part according to business needs For business is divided into QOS (delay sensitive, bandwidth sensitive) and non QOS (best effort delivery type). The first routing parameters defined above that different types of services, according to the needs of the application, for delay sensitive services, bandwidth sensitive services, best effort delivery type business, looking for the path to meet the application requirements and the smaller the link cost; secondly, according to the optimal path to meet the conditions of the QOS routing path, dynamic routing, and reservation mechanism for the special business design of high bandwidth requirements of QOS, non QOS routing select multiple paths to meet the requirements of the implementation of the communication process, load balancing, network congestion can be reduced. Achieve with self configuration, efficient routing and adaptive load balancing ability; finally, in view of the network failure caused the route is not available, take the initiative to maintain routing. When the business is sent to the node, The fault node receives the message and sent to the mobile agent to an error message identification, mobile agent routing or truncated complete rerouting according to the routing cache before. Using NS2 network simulation software to test the algorithm simulation design. The effectiveness and survivability to verify the algorithm. The simulation results show that the routing scheme for space information network agent can adapt to the network conditions based on multi service, satisfy the QoS requirements of different services, the realization of the communication process to improve the routing load balancing, fault tolerance, and reduce the network congestion, and the end-to-end delay, the average normalized throughput, energy saving, good performance of network throughput.

【学位授予单位】：东北大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TN927.2

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