Design And Implementation Of TD-SCDMA Indoor Distribution System In High Telephone Traffic Building

For a long time, indoor places have been major sites for wireless communication business and indoor telephone traffic takes up at least 70%. With the coming of mobile Internet era, this tendency has become increasingly obvious. Indoor wireless communication system has become an important link in mobile communication industry chain, and indoor network coverage and capacity is becoming more and more difficult to satisfy the ever-increasing users’ demands. Indoor distribution system is a natural extension of mobile communication network, so operators need to make special effort to create network which bears high-speed data traffic and strengthen indoor deep coverage and telephone traffic absorbing capacity.This thesis is based on TD-SCDMA(Time Division-Synchronous Code Division Multiple Access)technology basis and it introduces indoor distribution system of high telephone traffic building. Construction of indoor distribution system is a complicated systems engineering, involving multiple links such as planning, survey, design, project implementation, acceptance check, testing, optimizing, maintenance and so on, and information source, RPT (Repeater), passive device, antenna feed system as well as parameter optimization will all have direct influences on network quality of indoor distribution system. The author has completed the following work:(1) establishing on specific project cases, surveying the scenes, choosing and adopting BBU(Building Baseband Unit)+RRU (Remote Radio Unit)optical fiber distribution mulching method according to the survey information of the cases; determining location and number of BBU, RRU and antennas on each level as well as specific wires and routes according to the plane distribution provided by manufacturers and pointing out matters needing attention of indoor distribution system coverage projection implementation. (2) Aiming at properties of this project case, designing unique testing project. According to actual test results of coverage testing, capacity and link quality testing, switch test and coverage effect testing, optimizing the project case with pertinence. (3) Based on this project case, elaborating indoor distribution system interference investigation and positioning thinking as well as how to adopt targeted interference treatment measures.This thesis makes use of TD-SCDMA technology, combines specific high telephone traffic project case and makes a set of integrate indoor distribution system solution projection from design to implementation and from testing to optimization. Outdoor 3G network is advanced enough, so currently what needs development most is indoor 3G network. Construction of high-rise buildings has brought whole new challenges to cities when it brings economic development, hoping to make excellent network coverage, high-standard signal quality and super-maximal signal capacity.