本文選題：McWiLL + 軟交換技術(shù)�。� 參考：《哈爾濱工程大學(xué)》2013年碩士論文

【摘要】：本文從網(wǎng)絡(luò)構(gòu)架，，關(guān)鍵技術(shù)和空中接口等幾個(gè)方面，深入系統(tǒng)的研究了多載波無(wú)線信息本地環(huán)路（McWiLL，Multucarrier Wireless Information Local Loop）通信系統(tǒng)標(biāo)準(zhǔn)相關(guān)技術(shù)。針對(duì)McWiLL系統(tǒng)中關(guān)鍵技術(shù)之一的軟交換技術(shù)目前在專網(wǎng)中服務(wù)質(zhì)量進(jìn)一步提升的瓶頸問(wèn)題，本文總結(jié)了當(dāng)前解決軟交換QoS的主要方法及各自的優(yōu)缺點(diǎn)，從吞吐量、時(shí)延等指標(biāo)對(duì)系統(tǒng)性能的影響分析入手，嘗試將COPS協(xié)議融合到經(jīng)典的SIP協(xié)議中繼而形成修正的新協(xié)議，并在NS平臺(tái)上對(duì)系統(tǒng)性能進(jìn)行了仿真，仿真結(jié)果表明，新協(xié)議可有效解決原SIP中時(shí)延抖動(dòng)大及吞吐量受限的問(wèn)題。為軟交換技術(shù)在專網(wǎng)的進(jìn)一步應(yīng)用提供了技術(shù)儲(chǔ)備。 本文首先理論分析了McWiLL它是作為一項(xiàng)自主研發(fā)，具有完全自主知識(shí)產(chǎn)權(quán)的寬帶無(wú)線通信技術(shù)，是為行業(yè)專網(wǎng)和公網(wǎng)量身定做的無(wú)線接入系統(tǒng)。進(jìn)一步闡述了McWiLL的基本原理及性能，基于McWiLL的軟交換技術(shù)采用的是SIP協(xié)議，本文針對(duì)軟交換系統(tǒng)中可采用的幾種協(xié)議，進(jìn)行了呼叫流程比較。建立了有線+無(wú)線的普遍性模型，從吞吐量性能上分析了McWiLL中的軟交換采用SIP協(xié)議的緣由。從而分析了在軟交換各主流協(xié)議中，SIP協(xié)議所占的優(yōu)勢(shì)。其次，理論分析了解決軟交換協(xié)議的服務(wù)質(zhì)量問(wèn)題，并從仿真角度出發(fā)，修正一種提高軟交換服務(wù)質(zhì)量的COPS-SIP協(xié)議，該修正協(xié)議與傳統(tǒng)SIP協(xié)議相比具有較好的提升服務(wù)質(zhì)量能力。 本文從理論上分析了基于McWiLL的軟交換通信系統(tǒng)采用SIP協(xié)議的優(yōu)勢(shì)，并通過(guò)NS平臺(tái)仿真網(wǎng)絡(luò)的吞吐量，驗(yàn)證采用SIP協(xié)議的軟交換網(wǎng)絡(luò)性能更好。其次研究了在軟交換系統(tǒng)下的服務(wù)質(zhì)量QoS提升問(wèn)題，通過(guò)仿真驗(yàn)證COPS-SIP修正協(xié)議可有效解決網(wǎng)絡(luò)延時(shí)長(zhǎng)及抖動(dòng)范圍大的問(wèn)題，在不提升傳輸丟包率的前提下，可提高網(wǎng)絡(luò)吞吐能力，為提高話音、視頻、多媒體等通信服務(wù)質(zhì)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.
【學(xué)位授予單位】：哈爾濱工程大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2013
【分類號(hào)】：TN92

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