基于McWiLL的软交换技术在专网中的应用研究

发布时间：2018-05-19 06:44

本文选题：McWiLL + 软交换技术　；参考：《哈尔滨工程大学》2013年硕士论文

【摘要】：本文从网络构架，，关键技术和空中接口等几个方面，深入系统的研究了多载波无线信息本地环路（McWiLL，Multucarrier Wireless Information Local Loop）通信系统标准相关技术。针对McWiLL系统中关键技术之一的软交换技术目前在专网中服务质量进一步提升的瓶颈问题，本文总结了当前解决软交换QoS的主要方法及各自的优缺点，从吞吐量、时延等指标对系统性能的影响分析入手，尝试将COPS协议融合到经典的SIP协议中继而形成修正的新协议，并在NS平台上对系统性能进行了仿真，仿真结果表明，新协议可有效解决原SIP中时延抖动大及吞吐量受限的问题。为软交换技术在专网的进一步应用提供了技术储备。本文首先理论分析了McWiLL它是作为一项自主研发，具有完全自主知识产权的宽带无线通信技术，是为行业专网和公网量身定做的无线接入系统。进一步阐述了McWiLL的基本原理及性能，基于McWiLL的软交换技术采用的是SIP协议，本文针对软交换系统中可采用的几种协议，进行了呼叫流程比较。建立了有线+无线的普遍性模型，从吞吐量性能上分析了McWiLL中的软交换采用SIP协议的缘由。从而分析了在软交换各主流协议中，SIP协议所占的优势。其次，理论分析了解决软交换协议的服务质量问题，并从仿真角度出发，修正一种提高软交换服务质量的COPS-SIP协议，该修正协议与传统SIP协议相比具有较好的提升服务质量能力。本文从理论上分析了基于McWiLL的软交换通信系统采用SIP协议的优势，并通过NS平台仿真网络的吞吐量，验证采用SIP协议的软交换网络性能更好。其次研究了在软交换系统下的服务质量QoS提升问题，通过仿真验证COPS-SIP修正协议可有效解决网络延时长及抖动范围大的问题，在不提升传输丢包率的前提下，可提高网络吞吐能力，为提高话音、视频、多媒体等通信服务质量提供了新思路。
[Abstract]:Based on the network architecture, key technology and air interface, this paper studies the standard related technologies of multi-carrier wireless information local loop (McWiLL) Multucarrier Wireless Information Local Loop) communication system. Aiming at the bottleneck problem of softswitch technology, which is one of the key technologies in McWiLL system, to further improve the quality of service in private network, this paper summarizes the main methods of solving softswitch QoS and their respective advantages and disadvantages, from the throughput. Based on the analysis of the effect of delay and other indexes on the performance of the system, this paper attempts to merge the COPS protocol into the classical SIP protocol and then form a new modified protocol, and simulates the performance of the system on NS platform. The simulation results show that, The new protocol can effectively solve the problems of high delay jitter and limited throughput in the original SIP. It provides technical reserve for the further application of softswitch technology in private network. Firstly, this paper theoretically analyzes that McWiLL is a broadband wireless communication technology with complete independent intellectual property rights, which is a wireless access system tailored for industry private network and public network. The basic principle and performance of McWiLL are further expounded. The softswitch technology based on McWiLL uses SIP protocol. This paper compares the call flow of several kinds of protocols that can be used in softswitch system. The universal model of wired wireless is established, and the reason why softswitch in McWiLL adopts SIP protocol is analyzed in terms of throughput performance. The advantages of SIP in softswitch protocols are analyzed. Secondly, the quality of service (QoS) problem of softswitch protocol is analyzed theoretically, and a modified COPS-SIP protocol is modified from the point of view of simulation. Compared with the traditional SIP protocol, the modified protocol has a better capability of improving QoS. This paper theoretically analyzes the advantage of using SIP protocol in softswitch communication system based on McWiLL, and verifies that the performance of softswitch network using SIP protocol is better by simulating the throughput of network on NS platform. Secondly, the quality of service (QoS) enhancement problem in softswitch system is studied. The simulation results show that the COPS-SIP correction protocol can effectively solve the problem of long delay and wide jitter range, without increasing the transmission packet loss rate. It can improve the network throughput and provide a new way to improve the quality of communication such as voice, video, multimedia and so on.
【学位授予单位】：哈尔滨工程大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TN92

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