tailieunhanh - Các mạng UTMS và công nghệ truy cập vô tuyến P7

Logically deploying 3G networks implies dimensioning and implementing corresponding elements within a geographical area, where an operator would desire to offer advanced mobile communications services, . voice, mobile Internet, video-telephony, etc. In the preceding chapters we have outlined the service requirements and technical specifications of the UMTS solution. In this chapter we aim to describe the application of the proposed solutions and go through the process of designing a network to provide UMTS services. . | The UMTS Network and Radio Access Technology Air Interface Techniques for Future Mobile Systems Jonathan P. Castro Copyright 2001 John Wiley Sons Ltd Print ISBN 0-471-81375-3 Online ISBN 0-470-84172-9 H Deploying 3G Networks Background Logically deploying 3G networks implies dimensioning and implementing corresponding elements within a geographical area where an operator would desire to offer advanced mobile communications services . voice mobile Internet video-telephony etc. In the preceding chapters we have outlined the service requirements and technical specifications of the UMTS solution. In this chapter we aim to describe the application of the proposed solutions and go through the process of designing a network to provide UMTS services. Before describing the results of a field study with reference-parameters based on real scenarios we provide the necessary principles for dimensioning and implementing a 3G network using UMTS technology. We then present results of dimensioning and introduce the functional capabilities of the selected elements. Network Dimensioning Principles Figure identifies non-exhaustively the major areas to dimension a 3G network. It summarizes the essential tasks to obtain the necessary count of elements for implementation and network deployment. Input of requirements Dimensioning tasks Results Coverage of available terrain or region Transmission area Urban suburban rural etc. Radio propagation Macro- micro- pico- or hierarchical-cell environment I Capacity levels Types of tr affic and services duality of service Blocking probability service availability Network performance Efficiency tradeoffs Capacity and coverage calculations Network performance measurements and evaluation Radio network transmission dimensioning Core network transmission dimensioning Radio and CN transmission integration Network optimization Number of RNC centres Number of base station BS sites BS configurations options Choice of radio resource management