Child-mother type far-end radio frequency unit and method for realizing indoor deep coverage thereof

Abstract

The embodiment of the invention discloses a child-mother type far-end radio frequency unit and method for realizing indoor deep coverage thereof. The child-mother type far-end radio frequency units are connected through network cables and are connected to an expansion unit through the network cables or photoelectric composite cables. The expansion unit is connected to a baseband processing unit through an optical cable. The child-mother type far-end radio frequency unit comprises a radio frequency capacity type mother unit which is used for receiving and transmitting digital baseband signals of a baseband processing unit. The radio frequency coverage type subunit is used for receiving the intermediate frequency signal of the radio frequency capacity type mother unit, converting the intermediate frequency signal into a radio frequency signal, and transmitting the radio frequency signal to a built-in antenna of the radio frequency capacity type mother unit after passing through the filter amplifier. More than two external antenna interfaces are arranged in the radio frequency capacity type mother unit, and the external antenna interfaces are used for being externally connected with more than two radio frequency coverage type subunits through network cables. Through the child-mother type far-end radio frequency unit, the line loss can be reduced, and the coverage requirement can be met. In addition, implementation and maintenance are convenient, capacity expansion is easy, and overall manufacturing cost is low.

Description

technical field [0001] The invention relates to the technical field of mobile communication, in particular to a mother-son-mother type remote radio frequency unit and a method for realizing deep indoor coverage thereof. Background technique [0002] Indoor deep coverage has been covered by traditional distributed antenna systems (Distributed Antenna Systems, DAS). In the 2G / 3G era, DAS can fully meet the needs of voice and low-speed connection services. However, in the 4G era, the increase in unlimited data packages has led The crazy growth of user traffic has brought pressure on the expansion of the existing DAS network. The traditional DAS aims at coverage. Due to the improvement and rapid growth of capacity, the arrival of the 5G era, and the use of indoor high-frequency bands, the development of traditional DAS is limited. Therefore, in the 4G era, a new type of indoor digital distributed base station (Digital IndoorSystem, DIS) has been gradually adopted for coverage. ...

AI Technical Summary

Problems solved by technology

[0005] The present invention provides a parent-child type remote radio frequency unit and its method for realizing indoor deep coverage, in order to solve the problems in the prior art that multiple indoor sub-antennas are externally connected to the RU, that is, the small distribution method realizes indoor deep coverage, in order to achieve coverage Indicators to ensure the continuous coverage of the long-term evolution voice bearer indoors, resulting in the loss of external devices and feeders consumed in the transmission path, and the problem of difficult installation and maintenance

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