LTE (Long Term Evolution) base station system, cell merging method and cell splitting method

Abstract

The present invention provides an LTE (Long Term Evolution) base station system, a cell merging method and a cell splitting method. According to the LTE (Long Term Evolution) base station system, the cell merging method and the cell splitting method, an LTE base station digital unit is split into a digital parent unit and digital child units; the digital parent unit is responsible for the processing of an LTE layer 2 and layers above the LTE layer 2; the digital child units are responsible for the processing of an LTE layer 1; and the digital child units and radio frequency modules constitute remote-end modules of the LTE (Long Term Evolution) base station system of the present invention; the digital parent unit constitutes the near-end module of the LTE (Long Term Evolution) base station system of the present invention; the near-end module communicates with the emote end modules through a standard IP network, and therefore, deployment and expansion can be facilitated; related devices, modules or algorithms for optical communication, signal conversion, signal compression / decompression and so on are not required to be adopted, and therefore, technical complexity is low, and costs are low; and the remote-end modules independently perform demodulation and decoding, and therefore, the problem of ground noise rise caused by signal merging in the prior art can be solved.

Description

technical field [0001] The present invention relates to the technical field of communication, and more specifically, relates to an LTE base station system and a cell merging and splitting method. Background technique [0002] At present, according to the theory of electromagnetic propagation, the higher the frequency band, the worse the signal propagation ability and the higher the penetration loss, and the 4GLTE (fourth generation cellular communication system) signal is usually located in the high frequency band (for example, the frequency range of Band38 is 2570MHz-2620MHz) , so that the 4G signal of the outdoor macro base station has weak indoor coverage, and indoor coverage blind spots are prone to appear. On the other hand, most of the 4G services take place indoors, and the macro base station covers a large area, and its wireless resources are shared by a large number of users, which makes the user experience poor, especially in densely populated hotspot areas. [00...

AI Technical Summary

Problems solved by technology

[0002] At present, according to the theory of electromagnetic propagation, the higher the frequency band, the worse the signal propagation ability and the higher the penetration loss, and the 4GLTE (fourth generation cellular communication system) signal is usually located in the high frequency band (for example, the frequency range of Band38 is 2570MHz-2620MHz) , so that the 4G signal of the outdoor macro base station has weak indoor coverage, and indoor coverage blind spots are prone to appear.

On the other hand, most of the 4G services take place indoors, and the macro base station has a large coverage area, and its wireless resources are shared by a large number of users, so the experience for a single user is poor, especially in densely populated hotspot areas

[0003] Deploying small base stations indoors can enhance indoor coverage and improve user experience in hotspot areas, but small base stations face the following problems when deployed indoors: 1) Limited coverage

The indoor environment is complex, there are many compartments in the building, and materials such as walls and glass seriously attenuate the signal, and the effect of blind patch coverage is greatly reduced

2) Pilot pollution

Existing technology 1 has the following defects: it is necessary to increase the modules and devices related to optical communication, and the cost is increased; for baseband signal compression and decompression processing, it is necessary to add FPGA and other devices and implement corresponding algorithms, which increases the cost and complexity; Merging can easily lead to an increase in the noise floor, resulting in an increase in the bit error rate

The second existing technology has the following defects: it is necessary to add modules and devices such as intermediate frequency signal conversion, replication, and transmission, which increases the difficulty and cost of implementation; the combination of multiple uplink signals is likely to increase the noise floor, resulting in an increase in the bit error rate

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