本文選題：乘客信息系統(tǒng) + 以太網(wǎng)環(huán)網(wǎng)�。� 參考：《中國科學(xué)院大學(xué)(中國科學(xué)院工程管理與信息技術(shù)學(xué)院)》2017年碩士論文

【摘要】：乘客信息系統(tǒng),簡稱PIS(Passenger Information System),是現(xiàn)代軌道交通中越來越重要的系統(tǒng)之一。通過PIS系統(tǒng),能夠讓地鐵乘客在乘車過程中,得到通知公告、實(shí)時(shí)消息等,也能夠讓司機(jī)更好地掌握列車乘客的實(shí)時(shí)動(dòng)態(tài)。車載PIS系統(tǒng)主要包括廣播通信子系統(tǒng)、信息顯示和媒體播放子系統(tǒng)和CCTV視頻監(jiān)控子系統(tǒng)。隨著媒體、監(jiān)控信息的數(shù)字化、高清化,車載PIS系統(tǒng)需要越來越大的傳輸帶寬。近些年來,以太網(wǎng)技術(shù)飛速發(fā)展,已經(jīng)成為PIS系統(tǒng)傳輸數(shù)據(jù)的主流鏈路層協(xié)議,搭建冗余型網(wǎng)絡(luò)結(jié)構(gòu)是應(yīng)用于PIS系統(tǒng)的以太網(wǎng)交換機(jī)的必要條件。在車載PIS系統(tǒng)中,以太網(wǎng)鏈路層多數(shù)采用鏈路聚合、單環(huán)形網(wǎng)絡(luò)提供保護(hù)。根據(jù)IEC61375-3-4協(xié)議中關(guān)于ECN(Ethernet Consist Network)網(wǎng)絡(luò)拓?fù)涞慕榻B發(fā)現(xiàn),以太網(wǎng)梯形環(huán)網(wǎng)拓?fù)涞娜哂啾Ｗo(hù)性更高,為系統(tǒng)鏈路層提供了更好的可靠性。本文設(shè)計(jì)了一種應(yīng)用于車載PIS系統(tǒng)的以太網(wǎng)環(huán)網(wǎng)協(xié)議,該協(xié)議既可以搭建單環(huán)網(wǎng)拓?fù)?也可以搭建梯形環(huán)網(wǎng)拓?fù)�。并且基于二層以太網(wǎng)交換機(jī)平臺(tái),實(shí)現(xiàn)了該環(huán)網(wǎng)協(xié)議。本論文完成的主要工作如下:(1)設(shè)計(jì)一種環(huán)網(wǎng)協(xié)議,支持單環(huán)形拓?fù)渚W(wǎng)絡(luò)和梯形環(huán)網(wǎng)拓?fù)?(2)實(shí)現(xiàn)該環(huán)網(wǎng)協(xié)議,且網(wǎng)絡(luò)收斂時(shí)間小于50ms;(3)將該環(huán)網(wǎng)協(xié)議應(yīng)用在車載PIS系統(tǒng)中。本文設(shè)計(jì)實(shí)現(xiàn)了以太網(wǎng)環(huán)網(wǎng)協(xié)議,支持搭建單環(huán)拓?fù)渚W(wǎng)絡(luò)和梯形環(huán)拓?fù)渚W(wǎng)絡(luò)。當(dāng)鏈路變化時(shí),以太網(wǎng)網(wǎng)絡(luò)的收斂時(shí)間在50ms之內(nèi),大大地提高了系統(tǒng)鏈路層的冗余保護(hù)性,為日益重要的車載PIS系統(tǒng)提供更加可靠的以太網(wǎng)網(wǎng)絡(luò)連接。
[Abstract]:Passenger Information system (PIS(Passenger Information system) is one of the more and more important systems in modern rail transit. Through the PIS system, the subway passengers can be notified, real-time messages and so on in the process of riding, and the driver can also better grasp the real-time dynamics of train passengers. Vehicle PIS system mainly includes broadcast communication subsystem, information display and media playback subsystem and CCTV video monitor subsystem. With the digitalization and high definition of the media and monitoring information, the on-board PIS system needs more and more bandwidth. With the rapid development of Ethernet technology in recent years, Ethernet has become the mainstream link layer protocol for data transmission in PIS systems. Building redundant network structure is a necessary condition for Ethernet switches used in PIS systems. In on-board PIS system, the Ethernet link layer mostly adopts link aggregation, and the single ring network provides protection. According to the introduction of ECN(Ethernet Consist Network network topology in IEC61375-3-4 protocol, it is found that the redundancy protection of Ethernet trapezoidal ring network topology is higher, which provides better reliability for the system link layer. In this paper, an Ethernet ring network protocol for vehicular PIS system is designed. This protocol can not only build a single loop topology, but also a trapezoidal ring network topology. And based on layer 2 Ethernet switch platform, the ring network protocol is implemented. The main work of this thesis is as follows: (1) A ring network protocol is designed, which supports single ring topology network and trapezoidal ring network topology / 2). The network convergence time is less than 50 Ms / 3) and the ring network protocol is applied to the vehicle PIS system. In this paper, the Ethernet ring network protocol is designed and implemented to support the construction of single ring topology network and trapezoidal ring topology network. When the link changes, the convergent time of Ethernet network is within 50ms, which greatly improves the redundancy protection of system link layer, and provides more reliable Ethernet network connection for the increasingly important vehicular PIS system.
【學(xué)位授予單位】：中國科學(xué)院大學(xué)(中國科學(xué)院工程管理與信息技術(shù)學(xué)院)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TP393.11;U270.38

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