Service convergence is an important characteristic of NGN(Next Generation Networking). How to integrate the service
capabilities of telecommunication network and Internet. At first, this article puts forward the concepts and characteristics
of SOA (Service-Oriented Architecture) and Web Service, then discusses relationship between them. Secondly,
combined with five kinds of Service Provision in NGN, A service platform architecture design of NGN and a service
development mode based on SOA are brought up. At last, a specific example is analyzed with BPEL (Business Process
Execution Language) in order to describe service development flow based on SOA for NGN.
This paper introduces the basic conceptions and key technology of the Ajax and some popular frameworks in the J2EE
architecture, try to integrate all the frameworks into a new framework. The developers can develop web applications
much more convenient by using this framework and the web application can provide a more friendly and interactive
platform to the end users. At last an example is given to explain how to use the new framework to build a web-based
management system of the softswitch network.
Along with the development of information society, the requirement of high speed, large capacity transport system is more and more important. 40 Gb/s based optical transport system could provide more high speed and more large capacity information transport. So it is development trend of optical transmission system. In this paper, the research and development progress of 40 Gb/s (STM-256) SDH optical transmission system and 80×40 Gb/s DWDM system in China have been introduced, including Key technologies of 40 Gb/s optical signal transport and some test results of 40 Gb/s SDH optical system and 80×40 Gb/s DWDM system have been showed.
As we all know, the increasing speed of data traffic is exceeding gradually from voice in today’s communication network. The main reason is the explosive of Internet. The controversy with IP over ATM/SDH/Optical becomes hotter and hotter, Many people in the telecommunication field are doubt: HOW LONG WOULD SDH/SONET BE PROLONGED? WHAT KIND OF SDH EQUIPMENTS COULD BE USED IN THE NETWORK? With the analysis from several aspects: services in the network, new development with SDH technology, market in transport equipment, This paper is considered that the SDH with some new features would be predominant transport technology in the recent years.
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