Research And Plan On Local Telecommunication Optical Transmission Equipment Network

With the licensing of China telecom 3G, under the uniform arrangement and assignment, the telecom operators are prepared to optimize the network and promote the quality, thus paving the way for the construction of network for the future users to shape the new business capability as quickly as possible, to promote the users to take the first chance in the fierce competition of mobile telecom market and to realize the anticipated aims of networks, business and users promotion. Nowadays the business demands have switched from relying mainly on the original fix-net business to the cooperation of fixed-net business and mobile business. It becomes the most crucial for Changchun telecom network development how to found a basic network of input of seamless broad-band and differential bearing.Firstly, the thesis focuses on the background and necessity of the local optical transmission equipment networking. Under the great background of the licensing of China telecom 3G, the telecom operators are prepared to optimize the network and promote the quality, thus paving the way for the construction of network for the future users to shape the new business capability as quickly as possible, to promote the users to take the first chance in the fierce competition of mobile telecom market and to realize the anticipated aims of networks, business and users promotion. With the deepening of transmission task and the beginning of all-round business operation, the business demands have switched from relying mainly on the original fix-net business to the cooperation of fixed-net business and mobile business. It becomes the most crucial for Changchun telecom network development how to found a basic network of input of seamless broad-band and differential bearing.Secondly, it comes that the further gradually increase of the number of 10G layers is needed as the beginning of every layer of the five nuclear nodes requires at least 10G broadwidth. At the gathering level, 622 M interface rate cannot meet the needs of business development because of the gradual increase of access broadwidth. The 2.5G and 10G convergence will become the main body of future net construction. The main bearer at access layer is the 3G base stations of mobile network, each of which owns 8 2M, if one interface has 10, it needs the broadwidth of 160M, going beyond the rate limit of 155M. It is advised to build 622 broadwidth with the base station of more than 10 interfaces.Thirdly, the thesis proposes the current situation and problem of telecom local optical transmission equipment network as well as the principles and ideas of construction. The former core layer has one ZTE 10Gb/s circuit, and the slot makes so full use that it cannot afford the requirement of newly-found mobile data circuit. The thesis introduces the advancement, security and inflexibility and high efficiency of maintenance, on which the author presents the construction ideas.Furthermore the author lists some known techniques of local network transmission equipment network. It is critical that which transmission techniques supports the above questions. There are SDH,MSTP,OTN,ASON,DWDM and so on, each of which has its own application. Now the Topologic structure of the circuit network is the widest used, because it has the ability to cure itself. The MSTP based on SDH is the most proper to serve as the fusing interface of network edge to support the mixing business, especially the mixing business based on TDM. DWDM can organize and transmit the different wave lengths simultaneously. Compared with the traditional SDH, the intelligelizing optical network has the following features: supporting the automatic business assignment of interface to interface; supporting the topologic automatic seeking; supporting the security of Mesh group network, increasing the existence of network; supporting the differentiation to determine the needed protection levels; supporting the flow limit to adjust the network topologic according to the requirement of business. Instant and active adjustment of the topologic network realizes the best assignment of network resources. OTN is the best platform to bear broadwidth IP business and represents the developing direction of the next generation network with the combination of the advantages of SDH, the expansion of DWDM as well as transmission and exchange.Finally it introduces the project of telecom local optical transmission equipment network. The local telecom ought to take three levels of network structure, that is, the core layer, the convergence layer and the access layer, and the convergence layer and the core layer must take the topologic with the circuit and the grid; the access layer must take the circuit as a main part. According to the business requirements and wireless interfaces, the core layer and the convergence layer take ASON intelligenzing network as a method of protection and the access layer uses the biometric single-direction circuit as the protection method according to the business needs and the arrangements of the current network resources and wireless interfaces.