Research On Network Survivability And Its Application In Stock Trading Network

The Internet and other communication networks play a more important role in our life and we become much more dependent on networks. The malfunction in network will cause a temporary hold up to the network and a short time inconveniences to the user. Especially in the communication networks for certain area such as financial and stock trading, the malfunction will not only break their major business but also cause irretrievable loss to the network user, even bring unfavorable influence to the society. For this reason, an intensive research to the network survivability and the theory and operational approach to improve network survivability are important topics in network technology.On the basis of existing research, this paper has made an intensive research to the network survivability measure, survivable network design problem, network survivability theory applied in stock trading communication networks and the approach to improve network survivability of important key nodes. In this paper, we present an original algorithm of designing survivable network, and achieve a good result in real application using the theory combined with practical experience.In the beginning, the research background of this topic is introduced, and the definition of network survivability is given. As two major research areas of network survivability, the research content of survivable network design and network capacity optimization are summarized and introduced in detail.On the basis of this, factors which affecting the network survivability are intensively analyzed. According to deferent kinds of complicated network structure, a series of measure index of network survivability are designed in the purpose of quantitatively analyzing survivability of deferent kinds of network structure.Constructing a minimum cost network satisfying certain survivability requirements is the main target of survivable network design (SND) problem.In order to solve the SND problem with connectivity and hop constraint, an original spanning-tree optimization (STO) algorithm is designed which is able to solve the STO problem efficiently. The algorithm is useful and operational not only in planning and designing of large scope network but also in expanding and optimization of existing network. Given further research and development with investment in network expanding, the algorithm is valuable for practical application.The research achievement of network survivability is successfully used in construction of stock trading communication network. With continuous development of stock market, the securities business has achieved more contribution to the national economy and stronger influence. With its specialty, the securities business demands higher survivability to communication network. Constructing a communication network with high survivability is of great importance to the development of stock market. In this paper, the network structures of securities companies are introduced and analyzed. With the changing of trading pattern in securities companies, the demand of inner communication networks under different pattern is analyzed and the topological structure of network is advised.As the kernel of the China stock market, Shanghai Stock Exchange (SSE) plays an important role in it. And the communication network of SSE is also the kernel of the stock trading communication networks. In this paper, this network was intensively analyzed from the angel of network survivability. We discuss the characteristic, analysis the topological structure, and give some advices to expand business usage on the network.When the topological structure of the whole network has reached a fairly survivability, the survivable construction of important key nodes in network should not be ignored. After the analysis with networks of securities companies and SSE, the planning of Stock Technology Building network which is designed by the author is introduced in detail as an engineering example. During the planning and designing of access network and communication system of the whole building, using the research achievement of network survivability combined with practical measures concluded from long time working experience, the author systematically improved the survivability of important key nodes from many angels and achieved a good result.In the end, the main content and research achievement of this paper are concluded. The tendency of the research area is analyzed and forecasted.