Research On Construction Scheme Of TD-LTE Indoor Coverage

Since december2013the issue of Chinese4G operating license,ChinaMobile began construction of a large number of TD-LTE network.Themaindata oriented business TD-LTE,covered outdoor Acer station can notmeet the future development needs of customers,the indoor coverconstructionis particularly important,China Mobile is also theattention focus.In this paper,from the basic knowledge of TD-LTE,introduces theLTE network architecture and related.According to the relevant statedepartments approved the frequency resources and TD-SCDMA networkfrequency usage,TD-LTE indoor part of the working frequency is2350~2370MHz,leads to TD-LTE frame structure and OFDMA,MIMO,interferencesuppression and so on several key technology of TD-LTE.The technology is mature,also need to be applied in the scene.Indoor distribution coverage is mainly refers to the outdoor Acerstation can not penetrate buildings through distributed antenna systemto realize the indoor coverage. Indoor distribution system is to eachlocal signal source uniformly distributed inside the buildings, torealize the indoor coverage, thuscomprehensively addressed thecommunication quality of service inside the building, to develop highquality indoor mobile communication area. For TD-LTE system, smartantenna outdoor applications cannot be used in the indoor coveragesystem,these factors lead to obvious differences with the systemperformance and macro cellular indoor coverage system.Because of the distribution system in public a distribution systemindoor fournetwork collaboration, in the absence of LTE, often is tosatisfy a system ofindoor distribution structure combining various other standard,need a lot ofimprovement; calculation of coupled withcapacity expansion, therectification; meet the transformation of eachbusiness type isolation requirements the original distribution system;after several years of construction has been in a disastrous state,this time in LTE signals, the above described work need to do it again,the key is whether to stand up tothe transformation of the originaldistribution system. How to build theoperators to become the imminentproblem of TD-LTE indoor distribution system.This paper introduces the general principle of China Mobile TD-LTEindoor distribution system construction, how to select the initialconstruction ofindoor distribution property and project planningindicators, such as the common reference signal level value (RSRP),signal to interference and noise ratio (RS-SINR), signal leakageinspection requirements and system.Source construction from the sourceselection and configuration, frequency allocation, power allocation tothe RRU connection configuration requires one one states; focuses onthe construction scheme of distribution systemthe author met at work,in the project should be how to choose the centralized approach, ifneed to change the original indoor distribution system will be how totransform the details, such as the improvement andconstruction schemeof passive devices the. After the handover of regional planning andthe isolation requirements, detailed calculate the antennapower system,which provides an important basis for the design ofdistribution systemof follow-up.Finally, use the method introduced the distribution system commonlyuseddesign software–tian yue design software combined with a typicalcase,designed a set of TD-LTE indoor distribution system. In this paper, it’s suitable for the technical personnel concernedabout the TD-LTE industry development and the development of4Gtechnology, andpersonnel engaged in engineering TD-LTE design reference.