With the rapid speed of network backbone upgrading，various broadband access technologies have begun to emerge. Currently there are some access technologies such as XDSL，cable modem，ethernet access，wireless access and fiber access technologies. These access technologies have their own characteristics and weaknesses. The broadband fixed wireless access technology is more adapted with the development of broadband access trends and needs.

On the basis of telecom service move to maturity，the traditional fixed-line business is difficult to acclimate requirements of the times，growth rate of which falls rapidly．This article discusses on the development space and value-added business of fixed telephone．Value-added business is provided for the fixed phone users to improve the ARPU and increase corporate profits．

Multiple-Input Multiple-Output technique is one of the most promising breakthroughs in communication systems．In this paper，the effect of spatial correlation based on SCM (Spatial Channel Model) on MIMO channel capacity is studied and simulated from the aspect of angle spread and antenna spacing．

In this paper，the development of mobile communication system is introduced first，and the concept and function of 3G is described secondly，then the deployment of 3G is also introduced，and suggestions on the network deployment of the most typical system of 3G—WCDMA system are proposed at last．

ZigBee is a new short-range wireless communication standard for wireless personal networks．In this paper，we present the security essentials of the latest ZigBee Specification．We explain the key concepts，Trust Center，CCM* mode．In addition，we present a procedural description of how the security services and analysis SKKE and MEA protocols

The paper analyzes the current situation of GIS industry，illustrates the advantages of Silverlight technology over the other existing technologies in GIS solution，and in the meantime，realizes a reusable GIS component．It contains one module SilverlightMapSuiteCore．dll which is used for map rendering，and another module SilverlightEdition．dll which is used for user interaction．Both of these two modules are very flexible，so the customers can build their own applications by consuming and overwriting them，at last，we depict a vehicle tracking system which is developed based on this component to provide reference for the customer who have similar requirements．

In the paper the characters of current controlled conveyor and ideal modle are introduced． The design principles and methods of current controlled conveyor and current controlled conveyor with negetive intrinsic resistance are elaborated based on analyzing the translinear loop and the mixed translinear loop．

This paper proposes a solution of services and sales system based on data sharing mechanism in China．We study the current situations of China’s telecommunication enterprises’operations and existing supporting systems．Our solution includes functional structure，content and mechanisms of data sharing，and in-depth analysis of economic and social benefits of such systems．

PRA technology with the high data transfer rate and the advantages of the small switches is applied more and more widely．If users are using 1240 switches to enable the community "one-stop service"，PRA techniques can be applied through the Q．931 protocol implemented on the switch S-1240．We discuss the issues those are summed up while the S-1240 switches and the "one-stop service” are connected and debug in this text．

With the rapid development of communication and network technology，Web-based distance education system has begun to widely used，and the virtual learning community can provide a total solution for the individual learning and independent study，the article describes the definition of virtual learning communities， database and system architecture，discussing key technologies of system design，implementation in detail．

The technology of mobile communication service is analyzed in this paper，the map data is organized through mobile svg，the map service is provised through mobile phone with j2me，the mobile phone map service is designed based on j2me/mobile svg，and the key technology is analyzed．

CRBT is the personal value-added services which is the key project of telecommunications company．In practical engineering design，how to calculate treatment capacity of CRBT，how can both guarantee service complete smoothly and save money for the telecommunication operator，have become the key point of the CRBT．Aiming to these problems，the article explains the technology of CRBT service，the calculation model and method of server treatment capacity．

This article introduces the combination of computer and the medical diagnostic imaging, and describes the performance of the computer technology in the development and application of imaging diagnosis．The medical image remote diagnosis system based on B / S mode is developed, using the Web technology and combining with PACS (Picture Archiving and Communication System). The system can achieve the on-line remote diagnosis of image，and online communication with experts and consultation functions．

This paper introduces the LDP Graceful Restart technology based on the distributed router structure and combined with some high reliability technology。Graceful restart technology can keep the forwarding state changing gracefully and minimize the negative effect on the transient routing flap after the system restarting。LDP Graceful Restart minimizes the instability of the MPLS network because of the restart of LDP。At last，a scheme to implement the LDP Graceful Restart based on the distributed router is present。

It often has large amounts of data transmission between nodes of distributed flight simulation，and the generic Ethernet can’t meet requirements of real-time．In order to exchange the data between nodes in predictable time and meet requirements of real-time，one real-time network solution based on reflective memory network was presented in this paper．The reflective memory network with other traditional network was compared，and finally it was adopted．

Firstly the causes of harmonic in the power system are described，then the harm of harmonic is introduced，and several harmonic control measures and their advantages and disadvantages are discussed．Finally several harmonic control application examples are given for telecommunication operators controlling harmonic to provide a reference．

With the development of the urbanization and the rapid changes in national needs，how to adjust the cost of car spare parts inventory management，thereby significantly reducing the cost of automobile automotive supply chain become a vital issue．This paper analyzes the supply chain，design，combination of ABC classification and the classification of CVA classification inventory management．It also recommends the establishment of information sharing，based on the genetic algorithm to determine the safety stock，order point and order quantity to optimize spare parts inventory to reduce vehicle costs．

Following the rapid development of the high-performance computer application，some problems of the large scale application weren’t solved in the single computer or the single group of computer systems．So it needs all kinds of the high-performance computer systems which have the distributional geography and the heterogeneous systems．They are connected with the high-speed network．Grid technology can solve the high-performance computing application．Grid technology research both at home and abroad is outlined．The wide application and the future development of grid technology are pointed out．

In this article，the basic principle of Minimum Shift Keying system is studied with modulation of MSK．A design scheme of Minimum Shift Keying signal modulation based on FPGA is proposed．The whole design is implemented on FPGA based on the development platform MAX+PLUS II with VHDL source code．Based on the result of the simulation，the modulation of MSK signal is right．