星地混合网信令协议的扩展及其原型实现研究

发布时间：2018-05-30 20:49

本文选题：星地混合网络 + 通用多协议标签交换(GMPLS)　；参考：《西安电子科技大学》2016年硕士论文

【摘要】：星地混合网络具有覆盖范围广、通信距离远、地理条件限制小、组网灵活和易于实现等优点,是新一代通信系统的发展方向之一。在这种一体化融合网络中,信令系统是不可缺少的一部分。但是,相对于地面网络,星地混合网络具有卫星信道时延大与误码率偏高、星上资源有限和星上处理能力偏低等缺点,这对星地混合网络的信令系统提出了更高的要求。因此,有必要对星地混合网络的信令系统进行研究,提出适应卫星特殊环境的信令方案。本文首先通过分析卫星网络和地面网络的优势及其不足,概述星地混合网络,并介绍星地混合网络信令系统的研究状况和发展趋势;其次,比较已广泛使用的基于流量工程的资源预留协议(RSVP-TE)和基于约束路由的标签分发协议(CR-LDP),结合星地混合网络对多种交换类型和资源预留的功能需求,说明RSVP-TE信令协议更适合于星地混合网络,然后从标签交换通道(LSP)的建立、信令消息及对象等方面对其进行详细介绍;最后,基于RSVP-TE信令协议,本文主要完成以下工作:(1)针对卫星网络时延大,误码率偏高和卫星交换节点处理能力有限的特点,改进星上信令处理方案中标签交换路由器(LSR)和标签边缘路由器(LER)的功能结构;扩展应用于地面网络的RSVP-TE信令协议中的部分消息,包括设计用于建立嵌套LSP的多粒度分层标签对象和多粒度分层标签请求对象的结构、精简信令消息中的对象;给出多粒度LSPs(MG-LSPs)并行建立的信令流程,并分析信令消息传递过程中产生的时延。(2)根据RSVP-TE协议原型系统的功能要求,设计与实现信令系统框架中的RSVP-TE信令协议模块。在分析消息结构及消息格式的基础上,给出详细的信令消息处理流程,并采用C/C++编程语言实现这一处理流程。(3)从基本的RSVP协议、MG-LSPs的建立以及标记交换等方面测试RSVP-TE协议原型系统的功能,并对测试结果进行分析。
[Abstract]:The space-ground hybrid network has the advantages of wide coverage, long communication distance, small geographical constraints, flexible networking and easy implementation. It is one of the development directions of the new generation communication system. In this integrated network, signaling system is an indispensable part. However, compared with the terrestrial network, the satellite channel delay and bit error rate are high, the on-board resources are limited and the on-board processing capacity is low, which puts forward higher requirements for the signalling system of the satellite-ground hybrid network. Therefore, it is necessary to study the signaling system of the satellite-ground hybrid network and propose a signaling scheme suitable for the special environment of the satellite. Firstly, by analyzing the advantages and disadvantages of satellite network and terrestrial network, this paper summarizes the satellite and ground hybrid network, and introduces the research status and development trend of satellite and ground hybrid network signaling system. Comparing the widely used resource reservation protocol based on traffic engineering (RSVP-TEP) and the label distribution protocol (CR-LDP) based on constrained routing, combining with the functional requirements of multiple switching types and resource reservation in satellite and ground hybrid networks, It is explained that RSVP-TE signaling protocol is more suitable for satellite / ground hybrid network, then it is introduced in detail from the aspects of label switching channel (LSP), signaling message and object. Finally, based on RSVP-TE signaling protocol, it is introduced in detail. This paper mainly completes the following work: (1) in view of the characteristics of the satellite network with large delay, high bit error rate and limited processing capacity of the satellite switching node, the functional structure of the tag switching router (LSRR) and the label edge router (Ler) in the on-board signaling processing scheme is improved. Some messages in RSVP-TE signaling protocol applied to terrestrial network are extended, including the structure of multi-granularity hierarchical tag object and multi-granularity hierarchical tag request object for establishing nested LSP, and the object in signaling message is reduced. The signalling flow of multi-granularity LSPsM MG-LSPs) is presented, and the delay. 2) according to the functional requirements of the RSVP-TE protocol prototype system, the RSVP-TE signaling protocol module in the signaling system framework is designed and implemented. Based on the analysis of message structure and message format, a detailed process of signaling message processing is given. The C / C programming language is used to realize the function of the RSVP-TE prototyping system from the aspects of the basic RSVP protocol, the establishment of MG-LSPs and the label exchange, and the test results are analyzed.
【学位授予单位】：西安电子科技大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：TN927

【参考文献】