Design And Implementation Of Resource Node In Crbt System Suppoting IP Bearing

Along with the development of telecommunication industry, telecommunication technology and telecommunication market is more and more matured and standardized which also lead to a more fierce competition in this field. The mobile operator also faces the same problem in such an atmosphere. On the other side, telecommunication and IP technology is going to fusion, at this time, next generation core network base on soft switch and IP technology is becoming the first choice for the mobile operator.To satisfy the rapid growth of services and welcome the coming of 3G generation, GSM system in China Mobile is evolving to IP bearing step by step. IP means change the current circuit based core network to IP based soft switch system. IP bearing network is a telecommunication network using IP technology. As a production for evolving to IP gerneration, IP bearing network is the fusion of traditional telecommucation technology and IP technology. It possesses the flexability of Internet and the stablility, alibility and managability of telecommunication network. It can bear voice, data and video and providing the same service quality as traditional network and also has a value-add value chain. The most markable charater of IP bearing network is that it introduce the telecommunication network concept into the traditional IP technology.Color ring back tone service is one of the most important value add service in china mobile. In order to adapt to the trend of evolving to IP bearing network, according to the standard provided by China Mobile, this article mainly discuss how to implement the IP bearing network for resource node in the color ring back tone system. Color ring back tone system supporting IP bearing should has the ability to access TDM bearing network and IP bearing network at the same time; should support voice in AMR at 12.2 rate and G711 format; should support out band and in band number receiving function in IP R4 network. And for the resource node, it should have the ability to send the message to media gateway and communicate with media gateway using NbUP protocol under the control of control node in color ring back tone system.This artile will provide three different designs of the resource node base on the different voice board. Firstly, this artile introduce the background of this assay including the color ring back tone system and IP bearing network in China Mobile. Then this article describes the technical details base on the comparation of IP bearing color ring back tone system architecture and the old one. These details including the site access technology between MPLS VPN network, BICC and NbUP protocol and the implement of resource node such as play voice work flow, module design, class design. After that, this article also describes the network atchitectrue of these three kinds of implementation. At last, this article describes the test part.The following is the general idea of each chapter in this artile:Chapter 1: Introduce the base concept of color ring back tone system.Chapter 2: Introduce the position, architecture and service bearing of IP bearing network in China Mobile.Chapter 3: Describe the implementation of resource node and MPLS VPN network and BICC and NbUP protocol. Then, introduce the design of resource node from the service work flow, module view, class relationship and test. At last, this article describes the three different kind of network architecture.Chapter 4: Describe the test part of resource node supporting IP bearing, including test environment, test content, and test result.Chapter 5: The prospect of the IP bearing color ring back tone system and the resource node in this system.