本文選題：集中分布式 + SIP協(xié)議　； 參考：《電子科技大學(xué)》2014年碩士論文

【摘要】：會(huì)議在人類(lèi)政治、經(jīng)濟(jì)、文化及軍事活動(dòng)起著舉足輕重的作用,隨著社會(huì)的發(fā)展,會(huì)議成為人與人之間越來(lái)越重要的信息交流方式,而電話(huà)會(huì)議以其經(jīng)濟(jì)、便捷、高效等優(yōu)點(diǎn)被廣泛的使用。在實(shí)際使用過(guò)程中,參加電話(huà)會(huì)議的成員往往具有局部集中廣域分布特點(diǎn),本文將這種網(wǎng)絡(luò)簡(jiǎn)稱(chēng)為集中分布式網(wǎng)絡(luò)。常用的端用戶(hù)混合模式和集中混合模式有各自的缺點(diǎn):端用戶(hù)混合模式對(duì)終端能力要求較高,網(wǎng)絡(luò)中語(yǔ)音數(shù)據(jù)冗余,帶寬使用效率低,容易引起局部網(wǎng)絡(luò)擁塞;集中混合模式對(duì)服務(wù)器性能要求較高,不能避免局部網(wǎng)絡(luò)擁塞,帶寬使用效率不高。這兩種模式不能適應(yīng)集中分布式網(wǎng)絡(luò)的特點(diǎn)。另外,當(dāng)前對(duì)參會(huì)人數(shù)要求也越來(lái)越多,端用戶(hù)混合模式和集中混合模式受到混音器性能的限制逐漸不能滿(mǎn)足要求。本文在深入研究了集中分布式網(wǎng)絡(luò)特點(diǎn)、SIP協(xié)議、H.248/megaco協(xié)議以及混合模型的基礎(chǔ)上,設(shè)計(jì)和實(shí)現(xiàn)了一種基于SIP的分級(jí)混合的電話(huà)會(huì)議系統(tǒng)。本文的主要研究?jī)?nèi)容和所做的工作主要包含以下幾個(gè)方面:1)研究SIP協(xié)議標(biāo)準(zhǔn),通過(guò)對(duì)SIP協(xié)議擴(kuò)展,實(shí)現(xiàn)了分級(jí)電話(huà)會(huì)議創(chuàng)建、管理以及關(guān)閉功能的信令控制;2)研究實(shí)現(xiàn)了H.248/megaco協(xié)議在分級(jí)電話(huà)會(huì)議系統(tǒng)中的媒體控制機(jī)制,實(shí)現(xiàn)了分級(jí)電話(huà)會(huì)議系統(tǒng)媒體和信令分離,業(yè)務(wù)和媒體分離,使系統(tǒng)具有很強(qiáng)的靈活性和易擴(kuò)展性;3)研究對(duì)比現(xiàn)有電話(huà)會(huì)議混合模型特點(diǎn),提出并實(shí)現(xiàn)了適合分級(jí)電話(huà)會(huì)議系統(tǒng)的分級(jí)混合模型,分擔(dān)了混和器處理負(fù)荷,避免傳輸重復(fù)的媒體數(shù)據(jù),提高了帶寬使用效率;4)對(duì)分級(jí)電話(huà)會(huì)議系統(tǒng)進(jìn)行了主要的功能、性能測(cè)試,對(duì)項(xiàng)目所完成的結(jié)果進(jìn)行了評(píng)估,驗(yàn)證了系統(tǒng)的有效性和優(yōu)越性。
[Abstract]:The conference plays an important role in the political, economic, cultural and military activities of human beings. With the development of the society, the conference has become an increasingly important means of information exchange between people, and the teleconference is economical and convenient. The advantages of high efficiency are widely used. In the process of practical use, the members participating in teleconference often have the characteristic of local centralized wide area distribution. In this paper, this kind of network is referred to as centralized distributed network. The common end-user mixed mode and centralized mixed mode have their own disadvantages: the end-user mixed mode requires high terminal capability, the voice data in the network is redundant, the bandwidth is low, and the local network congestion is easy to be caused; The centralized hybrid mode requires high server performance, can not avoid the local network congestion, bandwidth use efficiency is not high. These two models can not adapt to the characteristics of centralized distributed networks. In addition, there are more and more demands on the number of attendees, and the performance of mixers can not meet the requirements of end-user mixing mode and centralized mixing mode. Based on the in-depth study of the SIP protocol H.248 / megaco protocol and the hybrid model, a hierarchical hybrid teleconferencing system based on SIP is designed and implemented in this paper. The main research content and work of this paper mainly include the following several aspects: 1) study the standard of SIP protocol. By extending the SIP protocol, we realize the establishment of hierarchical teleconference. The media control mechanism of H.248/megaco protocol in hierarchical teleconferencing system is studied and realized. The separation of media and signaling, service and media separation are realized in hierarchical teleconference system. So that the system has strong flexibility and extensibility. (3) comparing the characteristics of the existing teleconference hybrid model, a hierarchical hybrid model suitable for the hierarchical teleconference system is proposed and implemented, which shares the processing load of the mixer. Avoiding the transmission of duplicate media data and improving the bandwidth efficiency. The main functions and performance tests of the hierarchical teleconferencing system are carried out. The results of the project are evaluated and the effectiveness and superiority of the system are verified.
【學(xué)位授予單位】：電子科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類(lèi)號(hào)】：TN916.6

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本文編號(hào)：1888595