Four Network Sharing Indoor Coverage System

Mobile communication operator of network coverage, capacity, quality is the key to gaining a competitive advantage factor network coverage, network capacity, network quality essentially embodies the mobile network service levels, China Mobile, China Unicom, China Netcom, telecom network optimization by rough-turned to the fine-type network optimization, good coverage of the indoor area is currently the subject of network optimization. Indoor distributed system is optimized for indoor coverage an important source of indoor coverage mainly:large buildings, car parks, office buildings, hotels, stations, airports, shopping malls, stadiums, shopping malls, high-rise buildings.Indoor coverage is an important part of the overall wireless network, construction of indoor distribution system that exploits the absorb traffic, improve user experience, increase user stickiness. In a four-network integration business development background, GSM, TD-SCDMA and TD-LTE, WLAN equipped different coverage capabilities and business scenes, long-term coexistence. Technical design of indoor distribution system need to be integrated and taken into account, how to make the distribution system is full and rational use of resources, avoid duplication, repetitive construction, and interaction between systems.This paper starts from the GSM, TD-SCDMA, TD-LTE, WLAN four network technology standard, through the inter-system spurious, blocking, intermodulation interference theoretical analysis, inter-system interference calculated minimum coupling loss MCL, and take limits; With space loss model, link budget analysis models classified under four different scenarios come to a shared indoor distribution network construction can be a reference model; Create a reference model closer to the actual building needs of operators, to ensure the construction of multi-system does not repeat, do not waste, maximize control interference and ensure optimal network quality information and detailed guidance to follow norms, network construction investment efficiency optimization. The completion of this project for the construction of4G communications indoor distribution provides a model to follow the principles and design, effective use of existing operators indoor distribution system, energy savings and investment provides the technical means available, to enhance the operator’s market competitiveness, prospects are optimistic.