WO2018059345A1

WO2018059345A1 - Tma, method and tower site for combining rru signal

Info

Publication number: WO2018059345A1
Application number: PCT/CN2017/103134
Authority: WO
Inventors: 龚兰平; 崔亚楠
Original assignee: 华为技术有限公司
Priority date: 2016-09-29
Filing date: 2017-09-25
Publication date: 2018-04-05
Also published as: CN107888203A

Abstract

Disclosed in the present invention are a tower mounted amplifier (TMA), a method and a tower site for combining a radio remote unit (RRU) signal, which can realize the combination of an RRU signal and a base transceiver station (BTS) signal with low costs and low insertion loss. The TMA comprises: a first module, a second module, a first port, a second port, and an antenna port connected to both the first module and the second module. The first module is connected to the first port, the first port being connected to a BTS, and the first module is used for processing a downlink signal from the BTS inputted by the first port. The second module is connected to the second port, the second port being connected to an RRU, and the second module is used for filtering a downlink signal from the RRU inputted by the second port. The antenna port is connected to an antenna, and is used for combining the downlink signal from the BTS processed by the first module and the downlink signal from the RRU processed by the second module and then transmitting same by means of the antenna.

Description

TMA, method and tower site for combined RRU signals

This application claims priority to Chinese Patent Application No. 201610864576.1, entitled "TMA, Method and Tower Site for Combined RRU Signals", filed on September 29, 2016, the entire contents of which are hereby incorporated by reference. The citations are incorporated herein by reference.

Technical field

The present invention relates to the field of communications technology, and more particularly to TMA, methods and tower sites for combining RRU signals.

Background technique

With the rapid increase in mobile users and the increasing number of high-rise buildings, traffic density and coverage requirements are also rising. In order to meet the above requirements, the number of frequency bands supported by operators has been increasing. Due to the increase in the number of frequency bands, the limited carrying capacity of the tower site has become an urgent problem to be solved.

At present, in most of the operators' towers, one sector has one or two antennas and a small number of RadioRemote Units (RRUs). Referring to FIG. 1 , in the prior art, in order to realize that the tower station carries multiple frequency bands, a combiner (Combiner, COM) is added on the antenna side of the Tower Mounted Amplifier (TMA), as shown in FIG. 1 . The combiner has three ports, the first end of the combiner is connected to the antenna (Antenna, ANT), the second end of the combiner is connected to the TMA, and the third end of the combiner is connected to the RRU on the tower, TMA The other end of the RRU is connected to a Base Transceiver Station (BTS), and the other end of the RRU is connected to a Baseband Processing Unit (BBU). Therefore, the BTS signal and the RRU signal can be combined to the same antenna through the above-mentioned tower site. However, this practice increases the combiner and the jumper, thus increasing the cost and causing deterioration of the downstream insertion loss, and the construction is complicated.

Summary of the invention

It is an object of the present invention to provide a TMA, method and tower station for combining RRU signals that enable a combination of downlink signals from the RRU and downstream signals from the BTS at low cost and low insertion loss.

The object of the invention is achieved by the following technical solutions:

In a first aspect, an embodiment of the present invention provides a TMA for combining RRU signals, including: a first module, a second module, a first port, a second port, and a first module connected to the first module An antenna port connected to the second module, the first module is connected to the first port, the first port is connected to the BTS, the second module is connected to the second port, and the second port is connected to the RRU Connected, the antenna port is connected to the antenna. The first module is configured to process a downlink signal from the BTS input by the first port, and the second module is configured to filter a downlink signal from the RRU input by the second port. The antenna port is configured to combine the downlink signal from the BTS processed by the first module and the downlink signal from the RRU processed by the second module, and then transmit through the antenna. Therefore, the TMA provided by the embodiment of the present invention only needs to add a second module and a second port in the original TMA structure, the cost is low, the construction is relatively simple, and the combination loss can be effectively reduced without using a combiner, and the integration can be realized. The RRU downlink signal from the road and the downlink signal from the BTS.

In a possible implementation manner, when the antenna port inputs signals received by the antenna to the first module and the second module, respectively, the first module inputs the antenna port. Processing is sent to the BTS An uplink signal, and the uplink signal sent to the BTS is output to the BTS through the first port, and the second module filters the signal input by the antenna port to obtain the uplink signal sent to the RRU. And outputting the uplink signal sent to the RRU to the RRU through the second port. Therefore, the TMA provided by the embodiment of the present invention can separate the uplink signal destined for the RRU and the uplink signal sent to the BTS from the signal received by the antenna.

In a possible implementation manner, the second module includes a filter, the filter is a band pass filter, or a low pass filter, or a band stop filter, or a high pass filter; the filter, And performing filtering processing on the downlink signal from the RRU input by the second port, and filtering a signal input by the antenna port to obtain the uplink signal sent to the RRU. Therefore, the second module added in the TMA can be implemented by common filters at a lower cost.

In a possible implementation manner, when the number of the first modules is greater than or equal to 2, all the first modules share the first port. Therefore, the number of ports can be saved and the construction complexity can be reduced.

In a second aspect, an embodiment of the present invention provides an iron tower site, including the TMA, the BTS, the RRU, the antenna, and the BBU according to the first aspect; wherein the antenna is connected to an antenna port of the TMA; Connected to the first port of the TMA; the RRU has one end connected to the second port of the TMA and the other end connected to the BBU. Therefore, the tower station provided by the embodiment of the invention can realize the combination of the RRU signal and the BTS signal at low cost and low insertion loss, and realize that the tower station carries multiple frequency bands.

In a third aspect, an embodiment of the present invention provides a method for combining RRU signals, including: a first module in a TMA processes a downlink signal from a BTS input by a first port; and a second module in the TMA The downlink signal from the RRU input by the second port is filtered. The antenna port in the TMA combines the downlink signal from the BTS processed by the first module and the downlink signal from the RRU processed by the second module, and then transmits through the antenna. Therefore, the method provided by the embodiment of the present invention can implement the RRU downlink signal from the combined path and the downlink signal from the BTS.

In a possible implementation manner, the method further includes:

When the antenna port in the TMA inputs signals received by the antenna to the first module and the second module, respectively, the first module in the TMA inputs to the antenna port The signal processing obtains the uplink signal sent to the BTS, and outputs the uplink signal sent to the BTS to the BTS through the first port; the second module in the TMA inputs the antenna port The signal filtering process obtains the uplink signal sent to the RRU, and outputs the uplink signal sent to the RRU to the RRU through the second port. Therefore, the method provided by the embodiment of the present invention can separate the uplink signal destined for the RRU and the uplink signal sent to the BTS from the signal received by the antenna.

DRAWINGS

1 is a schematic structural view of a conventional iron tower site in the background art of the present invention;

2 is a schematic structural diagram of a conventional TMA according to an embodiment of the present invention;

3 is a schematic structural diagram of a TMA for combining RRU signals according to an embodiment of the present invention;

4 is a schematic diagram of a specific connection relationship of a TMA for a combined RRU signal according to an embodiment of the present invention;

FIG. 5 is a schematic structural diagram of an iron tower station according to an embodiment of the present invention; FIG.

6 is a schematic diagram of a specific connection relationship of a tower site in an embodiment of the present invention;

7 is a schematic diagram of a dual-frequency TMA structure of a combined f3 frequency band in an iron tower station including an antenna according to an embodiment of the present invention;

FIG. 8 is a schematic diagram of a dual-frequency TMA structure of a combined f3 frequency band in an iron tower station including two antennas according to an embodiment of the present invention.

detailed description

The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

First, a brief introduction to the structure of the traditional TMA. Referring to Figure 2, the conventional TMA includes an antenna port (ANT0) and a BTS port (BTS 0). One end of the ANT0 is connected to the antenna, the other end is connected to the f1 filter and the f2 prefilter, and the other of the f1 filter One end is connected to BTS 0, the other end of the f2 prefilter is connected to a Low-Noise Amplifier (LNA), the other end of the LNA is connected to the f2 post filter, and the other end of the f2 post filter is paranoid. The circuit and lightning protection device are indirectly connected to BTS 0. The other parts of the circuit in Figure 2 are the configuration circuit and the protection circuit. The BTS downlink signal corresponds to the f1 frequency band, and the BTS downlink signal input through the BTS0 is filtered by the f1 filter, and then transmitted through the ANT0 connected antenna; the BTS uplink signal corresponds to the f2 frequency band, and the BTS uplink signal input through the ANT0 passes through the f2 The pre-filter performs filtering processing, and then is amplified by the LNA, and finally filtered by the f2 post filter, and then output to the BTS through the BTS0.

It can be seen from the above that the main function of the traditional TMA is to solve the uplink and downlink unbalanced coverage of the base station system and improve the uplink data rate.

An embodiment of the present invention provides a TMA for combining RRU signals. Referring to FIG. 3, the method includes: a first module and a second module, a first port, a second port, and a first module connected to the second module. The antenna port to which the module is connected;

The first module is connected to the first port, and the first port is connected to the BTS, and the first module is configured to process the downlink signal from the BTS input by the first port.

The second module is connected to the second port, and the second port is connected to the RRU, and the second module is configured to filter the downlink signal from the RRU input by the second port.

The antenna port is connected to the antenna, and is configured to combine the downlink signal from the BTS processed by the first module and the downlink signal from the RRU processed by the second module, and then transmit through the antenna.

Optionally, the antenna port is further configured to input signals received by the antenna to the first module and the second module, respectively.

The first module is further configured to process the signal input to the antenna port to obtain an uplink signal sent to the BTS, and output the uplink signal sent to the BTS to the BTS through the first port.

The second module is further configured to filter the signal input by the antenna port to obtain an uplink signal sent to the RRU, and output the uplink signal sent to the RRU to the RRU through the second port.

Optionally, the second module comprises a filter, the filter being a bandpass filter, or a low pass filter, or a band stop filter, or a high pass filter.

The filter in the second module is configured to filter the downlink signal from the RRU input by the second port, and filter the signal input by the antenna port to obtain an uplink signal sent to the RRU.

The first module in the embodiment of the present invention is used to implement the function of the traditional TMA, and the second module is configured to filter the downlink signal from the RRU, and pass the processed downlink signal from the RRU through the antenna port and the first module. The processed downlink signal from the BTS is combined and transmitted through the antenna, and the received signal including the uplink signal sent to the BTS and the uplink signal sent to the RRU is filtered to obtain an uplink signal to the RRU. Therefore, adopt The TMA provided by the embodiment of the invention adds a second module and a second port, has lower cost, is relatively simple to construct, and can reduce insertion loss without using a combiner, and can reduce cost, low construction complexity and low insertion loss. The RRU downlink signal from the BTS and the downlink signal from the BTS are combined, and the RRU uplink signal and the uplink signal sent to the BTS are separated.

The following description is made with reference to a specific embodiment. Referring to FIG. 4, the TMA includes a first module and a second module. The first module includes an f1 transmit bandpass filter 202, a f2 pre-receive filter 203, and a f2 post-receiver. Filter 204, LNA 301, and other configuration and protection circuits. The second module includes an f3 filter 201, wherein the f3 filter can be any of a low pass, a high pass, a band pass, and a band stop filter. The TMA may also include base

station side ports

102, 103 and antenna side port 101. The base station side port 102 corresponds to the first port in FIG. 3, the base station side port 103 corresponds to the second port in FIG. 3, and the antenna side port 101 corresponds to the antenna port in FIG.

The connection relationship of each component in the TMA is specifically: the port 101 is connected to the f3 filter 201, the f1 is used to transmit the bandpass filter 202, the end of the f2 pre-receive filter 203, the other end of the f3 filter 201 is connected to the port 103, and the f1 emission band The other end of the pass filter 202 is connected to the port 102, the other end of the f2 pre-reception filter 203 is connected to the input end of the LNA 301, the output end of the LNA 301 is connected to the end of the f2 post-receiving filter 204, and the f2 is followed by the receive filter 204. One end is connected to port 102.

Further, referring to FIG. 5, an embodiment of the present invention provides an iron tower site, a BTS, an RRU, an antenna, and a BBU;

An antenna connected to the antenna port of the TMA;

BTS, connected to the first port of the TMA;

The RRU has one end connected to the second port of the TMA and the other end connected to the BBU.

FIG. 6 is a schematic diagram of a specific connection relationship of an iron tower station according to an embodiment of the present invention, wherein the BBU is not shown. among them. The BTS can be located in the lower room of the tower site, while the RRU can be located on the tower site. The ANT is connected to the port 101 in the TMA shown in FIG. 4, the BTS is connected to the port 102, and the RRU is connected to the port 103.

The specific process of combining RRU signals in conjunction with FIG. 5 and FIG. 6 is as follows:

The downlink signal from the BTS input by the BTS through the port 102 is filtered by the f1 band pass filter, and the downlink signal from the RRU input by the RRU through the port 103 is filtered by the f3 filter, and the two processed signals are obtained. The downlink signal of the BTS and the downlink signal from the RRU are combined and output through the port 102, and radiated through the antenna.

The frequency of the downlink signal of the RRU is f3, and the frequency of the downlink signal of the BTS is f2. The downlink signal from the RRU and the downlink signal from the BTS are combined into one path by the above process.

The signals received by the antenna include an uplink signal sent to the RRU and an uplink signal sent to the BTS. The f2 pre-bandpass filter and the f3 filter are respectively input through the port 101, wherein the uplink signal destined for the RRU by the f3 filter is output to the RRU through the port 103, and is sent to the BTS through the f2 pre-bandpass filter. After the uplink signal is amplified by the LNA, the bandpass filter is passed through the f2, and finally the obtained uplink signal sent to the BTS is output to the BTS through the port 102.

The frequency of the uplink signal sent to the RRU is f3, and the frequency of the uplink signal sent to the BTS is f2. The uplink signal sent to the RRU and the uplink signal sent to the BTS are separated by the above process, and the uplink is sent to the RRU. The signal and the upstream signal sent to the BTS.

In addition, when the number of the first modules is greater than or equal to 2, all of the first modules may share the first port. When the number of second modules is greater than or equal to 2, a second port may be configured for each second module.

Referring to FIG. 7 , a one-shot (1T1R), that is, an iron tower station including one antenna, a dual-frequency TMA structure diagram of the combined f3 frequency band, and the TMA shown in FIG. 6 can combine the downlink signals from the RRU in the f3 frequency band. And including two first modules, the uplink signals sent to the BTS corresponding to the two first modules and the downlink signals from the BTS are different in frequency bands, Don't be f2 and f1, f4 and f5, the control circuit and protection circuit in the two first modules can be shared.

Referring to FIG. 8, the two-way (2T2R), that is, the tower station including two antennas, the dual-frequency TMA structure of the combined f3 band, and the TMA shown in FIG. 7 can combine the downlink of the f3 band from the RRU. Signal, two TMAs are connected together, each TMA contains two first modules, and two TMAs can share control and protection circuits.

In summary, the TMA and the tower station provided by the embodiment of the present invention only need to add a second module and a second port in the original TMA structure, and only need to include one filter in the second module, so the cost is relatively high. Low, and the construction is relatively simple, and the use of the combiner can effectively reduce the insertion loss. Therefore, the downlink signal from the RRU and the downlink signal from the BTS can be combined at low cost, low construction complexity, and low insertion loss.

While the preferred embodiment of the invention has been described, it will be understood that Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and the modifications and

Those of ordinary skill in the art will appreciate that the elements and algorithm steps of the various examples described in connection with the embodiments disclosed herein can be implemented in electronic hardware or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the solution. A person skilled in the art can use different methods for implementing the described functions for each particular application, but such implementation should not be considered to be beyond the scope of the present invention.

It is apparent that those skilled in the art can make various modifications and variations to the embodiments of the invention without departing from the spirit and scope of the embodiments of the invention. Thus, it is intended that the present invention cover the modifications and modifications of the embodiments of the invention.

Claims

A tower amplifier TMA for combining a RRU signal of a radio remote unit, comprising: a first module, a second module, a first port, a second port, and connected to the first module and An antenna port connected to the second module; wherein

The first module is connected to the first port, the first port is connected to a base transceiver station BTS, and the first module is configured to input a downlink signal from the BTS input by the first port. Process

The second module is connected to the second port, the second port is connected to the RRU, and the second module is configured to filter the downlink signal from the RRU input by the second port;

The antenna port is connected to the antenna, and is configured to combine the downlink signal from the BTS processed by the first module and the downlink signal from the RRU processed by the second module, and then pass the antenna emission.
The TMA of claim 1 wherein:

The antenna port is further configured to: input signals received by the antenna to the first module and the second module, respectively;

The first module is further configured to: process the signal input to the antenna port to obtain the uplink signal sent to the BTS, and output the uplink signal sent to the BTS to the BTS by using the first port. ;

The second module is further configured to: perform signal filtering processing on the input of the antenna port to obtain the uplink signal sent to the RRU, and output the uplink signal sent to the RRU to the RRU through the second port. .
The TMA according to claim 2, wherein said second module comprises a filter, said filter being a band pass filter, or a low pass filter, or a band stop filter, or a high pass filter;

The filter is configured to perform filtering processing on the downlink signal from the RRU input by the second port, and perform filtering processing on a signal input by the antenna port to obtain the uplink signal sent to the RRU.
The TMA according to any one of claims 1 to 3, wherein when the number of the first modules is greater than or equal to 2, all the first modules share the first port.
An iron tower site, characterized by comprising the TMA, BTS, RRU, antenna and baseband processing unit BBU according to any one of claims 1-4;

The antenna is connected to an antenna port of the TMA;

The BTS is connected to the first port of the TMA;

The RRU has one end connected to the second port of the TMA and the other end connected to the BBU.
A method for combining RRU signals, comprising:

The first module in the tower amplifier TMA processes the downlink signal from the BTS input by the first port;

The second module in the TMA performs filtering processing on the downlink signal from the RRU input by the second port;

The antenna port in the TMA combines the downlink signal from the BTS processed by the first module and the downlink signal from the RRU processed by the second module, and then transmits through the antenna.
The method of claim 6 further comprising:

The antenna port in the TMA inputs signals received by the antenna to the first module and the second module, respectively;

The first module in the TMA processes the signal input to the antenna port to obtain the uplink signal sent to the BTS, and outputs the uplink signal sent to the BTS to the BTS through the first port. ;

Filtering the signal input by the second module in the TMA to the antenna port to obtain the sending to the RRU An uplink signal, and the uplink signal sent to the RRU is output to the RRU through the second port.