Base station signal monitoring system and method

Abstract

To provide a system and method of monitoring a base station signal.SOLUTION: A base station signal monitoring system includes: a plurality of optical transmission devices configured to transmit a base station signal; a measuring device configured to measure the base station signal according to a preset method; and a switch device, connected to the plurality of optical transmission devices and the measuring device, and configured to switch connections between a plurality of input ports and a plurality of output ports so that the base station signal is transmitted from one of the optical transmission devices to another of the optical transmission devices or the measuring device.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a base station signal monitoring system and method. [Background technology]

[0002] The term "fronthaul" refers to a link connecting a digital data processing device (eg, a Digital Unit (DU)) of a base station and a remote radio signal processing device (eg, a Radio Unit (RU)) in a radio access network for mobile communications.

[0003] In the case of existing active fronthaul equipment based on WDM (Wavelength Division Multiplexing) used for data distribution in the fronthaul, the equipment only performed Optical-Electrical-Optical (OEO) conversion and 3R (Reamplification, Retiming, Reshaping) processing on signals from base station equipment (DU, RU, etc.) and transmitted them to other equipment. Therefore, to change the connection between the client side signal and the WDM side signal, an administrator must visit the site in person and release and change the OJC (Optical Jumper Code) connected to each device.

[0004] In addition, in order to measure or monitor base station signals transmitted and received through base station equipment, a manager must personally visit the site and connect a measuring device to the equipment. For example, in order to measure base station signals transmitted and received through a base station antenna, a manager must visit the site where the antenna is installed, form a tap in a cable connected to the antenna, install a splitter in the tap, and then connect a measuring device. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] US Patent Application Publication No. 2018 / 0234200 Summary of the Invention [Problem to be solved by the invention]

[0006] The problem to be solved by the present invention is to provide a base station signal monitoring system and method capable of remotely monitoring a base station signal without the visit of an administrator.

[0007] The technical problems to be solved by the technical idea of ​​the present invention are not limited to the problems mentioned above, and other problems not mentioned will be clearly understood by those skilled in the art from the following description. [Means for solving the problem]

[0008] According to one aspect of the present invention, there is provided a base station signal monitoring system comprising: a plurality of optical transmission devices that transmit base station signals; a measurement device that measures the base station signals in a predetermined manner; and a switch device connected to the plurality of optical transmission devices and the measurement device, and switching connections between a plurality of input ports and a plurality of output ports so that the base station signal is transmitted from one of the plurality of optical transmission devices to another of the plurality of optical transmission devices or to the measurement device.

[0009] According to an exemplary embodiment, the switch device receives a base station signal transmission request from the measurement device, switches connections between the multiple input ports and the multiple output ports, and transmits at least a portion of the base station signal corresponding to the base station signal transmission request to the measurement device.

[0010] According to an exemplary embodiment, the switch device receives a base station signal transmission request from the measurement device, replicates at least a portion of the base station signal corresponding to the base station signal transmission request, and transmits the replicated signal to the measurement device.

[0011] According to an exemplary embodiment, the base station signal monitoring system further includes a server connected to the switch device and transmitting change information to the switch device for changing the connection state between the multiple input ports and the multiple output ports, and the switch device controls the connection between the multiple input ports and the multiple output ports in accordance with the change information.

[0012] According to another aspect of the present invention, a switch device is provided comprising: a plurality of input ports respectively connected to a plurality of optical transmission devices; a plurality of output ports each connected to one of the plurality of optical transmission devices and a measurement device; a switch for switching connections between the plurality of input ports and the plurality of output ports so that a base station signal is transmitted from one of the plurality of optical transmission devices to another of the plurality of optical transmission devices or the measurement device; and a switch controller for controlling the switch in accordance with predetermined connection information.

[0013] According to an exemplary embodiment, the switch device further includes a communication modem that receives a base station signal transmission request from the measurement device, and the switch controller controls the switch so that at least a portion of the base station signal corresponding to the base station signal transmission request is transmitted to the measurement device.

[0014] According to an exemplary embodiment, the switch device further includes a communication modem that receives a base station signal transmission request from the measurement device, and the switch controller duplicates at least a portion of a base station signal corresponding to the base station signal transmission request and controls at least one of the switch and the communication modem so that at least a portion of the duplicated base station signal is transmitted to the measurement device.

[0015] According to an exemplary embodiment, the switch device further includes a communication modem that receives change information for changing a connection state between the plurality of input ports and the plurality of output ports from a server to which it is connected, and the switch controller controls the switch in accordance with the change information.

[0016] According to yet another aspect of the present invention, an optical transmission device is provided, comprising: a plurality of signal processors each processing a plurality of base station signals in a predetermined manner; a plurality of laser modules each connected to the plurality of signal processors and converting the plurality of base station signals output from the plurality of signal processors into optical signals; a switch switching the connection between the plurality of signal processors and the plurality of laser modules so that each of the plurality of base station signals is input to a corresponding one of the plurality of laser modules; and a switch controller controlling the switch in accordance with predetermined connection information.

[0017] According to an exemplary embodiment, the optical transmission device further includes a communication modem that receives a base station signal transmission request from a connected measurement device, and the switch controller controls the switch so that at least a portion of the base station signals corresponding to the base station signal transmission request among the plurality of base station signals are transmitted to the measurement device.

[0018] According to an exemplary embodiment, the optical transmission device further includes a communication modem that receives a base station signal transmission request from a connected measurement device, and the switch controller duplicates at least a portion of a base station signal corresponding to the base station signal transmission request among the plurality of base station signals, and controls at least one of the switch and the communication modem so that at least a portion of the duplicated base station signal is transmitted to the measurement device.

[0019] According to an exemplary embodiment, the optical transmission device further includes a communication modem that receives change information for changing a connection state between the plurality of signal processors and the plurality of laser modules from a server to which it is connected, and the switch controller controls the switch in accordance with the change information. Effect of the Invention

[0020] According to the present invention, there is provided a base station signal monitoring system and method that can remotely monitor base station signals without the visit of an administrator.

[0021] The effects obtained by the embodiments according to the technical concept of the present invention are not limited to the effects mentioned above, and other effects not mentioned will be clearly understood by those skilled in the art from the following description. [Brief description of the drawings]

[0022] [Figure 1] 1 is a configuration diagram of a base station signal monitoring system according to one embodiment of the present invention. [Diagram 2] 1 is a block diagram of an optical transmission device according to an embodiment of the present invention; [Diagram 3] 1 is a block diagram of a switch device according to an embodiment of the present invention; [Figure 4] 1 is a configuration diagram of a base station signal monitoring system according to another embodiment of the present invention. [Diagram 5] FIG. 13 is a block diagram illustrating the configuration of an optical transmission device according to another embodiment of the present invention. BEST MODE FOR CARRYING OUT THEINVENTION

[0023] The technical idea of ​​the present invention can be modified in various ways and can have various embodiments, and therefore, specific embodiments are illustrated in the drawings and will be described in detail. However, this is not intended to limit the technical idea of ​​the present invention to the specific embodiments, and it should be understood that the technical idea of ​​the present invention includes all modifications, equivalents, and alternatives included in the scope of the technical idea of ​​the present invention.

[0024] In describing the technical concept of the present invention, if a detailed description of the related known art is deemed to unnecessarily obscure the gist of the present invention, the detailed description will be omitted. In addition, numbers (e.g., 1, 2, etc.) used in the description of this specification are merely identification symbols for distinguishing one component from another.

[0025] In addition, when a component is referred to as being "coupled" or "connected" to another component in this specification, it should be understood that the component may be directly coupled or connected to the other component, but unless specifically stated to the contrary, it may also be coupled or connected via another component in between.

[0026] In addition, terms such as "module", "device" and "child" used in this specification refer to a unit that processes at least one function or operation, and this is embodied as hardware or software, or a combination of hardware and software, such as a processor, microprocessor, microcontroller, CPU (Central Processing Unit), GPU (Graphics Processing Unit), APU (Accelerate Processor Unit), DSP (Drive Signal Processor), ASIC (Application Specific Integrated Circuit) or FPGA (Field Programmable Gate Array).

[0027] It is to be noted that the components in this specification are merely classified according to the main function of each component. That is, two or more components described below may be combined into one component, or one component may be divided into two or more components according to further subdivided functions. It goes without saying that each component described below may perform some or all of the functions of other components in addition to its own main function, and some of the main functions of each component may be exclusively performed by other components.

[0028] Hereinafter, various embodiments according to the technical concept of the present invention will be described in detail.

[0029] FIG. 1 is a configuration diagram of a base station signal monitoring system according to one embodiment of the present invention, FIG. 2 is a block configuration diagram of an optical transmission device according to one embodiment of the present invention, and FIG. 3 is a block configuration diagram of a switch device according to one embodiment of the present invention.

[0030] Referring to Fig. 1, a base station signal monitoring system 100 according to an embodiment of the present invention includes n COTs (Central Office Terminals) 110-1 to 110-n, n RTs (Remote Terminals) 120-1 to 120-n, a switch device 130, a measurement device 140, and a server 150 (where n is a natural number). For convenience of explanation, Fig. 1 shows an embodiment in which the number of COTs and RTs is equal and one COT and one RT are connected to each other, but the technical idea of ​​the present invention is not limited thereto. The number of COTs and RTs and the structure in which they are connected to each other may vary.

[0031] Each of the n COTs 110-1 to 110-n is connected to at least one of the n RTs 120-1 to 120-n. The COTs and RTs connected to each other are connected through optical cables to form an optical transmission network through their interconnection. Of the COTs and RTs connected to each other, the COT is connected to a part of the base station that performs digital processing, for example, at least one DU (Digital Unit) or BBU (BaseBand Unit), in a fronthaul segment of the radio access network architecture, and the RT is connected to a part of the base station that performs radio processing, for example, at least one RU (Radio Unit) or RRH (Remote Radio Head). However, the present invention is not limited thereto, and of the COTs and RTs connected to each other, the COT may be connected to at least one macro cell RU, and the RT may be connected to at least one small cell RU. Depending on various fronthaul topologies of the radio access network architecture, the connection targets and interconnection structures of the COTs and RTs may be variously modified.

[0032] The switch device 130 is connected to the n COTs 110-1 to 110-n. The switch device 130 and each of the n COTs 110-1 to 110-n are connected by an optical cable.

[0033] The switch device 130, the measurement device 140, and the server 150 are connected by a network 170. The network 170 can be applied regardless of the type of communication network as long as it can connect the switch device 130, the measurement device 140, and the server 150. Therefore, the network 170 is one or more of the Internet, an intranet, an optical communication network, and a mobile network.

[0034] 1 shows an example of application of the base station monitoring system 100 to an optical transmission network, which is a sub-network constituting a fronthaul segment of a radio access network architecture, but the technical idea of ​​the present invention is not limited thereto. It is clear that the technical idea of ​​the present invention is also applicable to optical transmission networks such as midhaul and backhaul segments of a radio access network architecture, and further to FTTx solutions and in-building solutions.

[0035] The operation of each component of the base station signal monitoring system 100 according to an embodiment of the present invention will now be described in more detail.

[0036] First, the COTs 110-1 to 110-n (hereinafter collectively referred to as '110') are devices that multiplex base station signals and transmit them to one or more connected RTs (one or more of 120-1 to 120-n). For example, the COT 110 receives m base station signals (where m is a natural number) from a DU (not shown) and converts them into a WDM signal. The COT 110 also transmits the WDM signal to one or more connected RTs (one or more of 120-1 to 120-n) through an optical cable. That is, the COT 110 receives m base station signals, converts them into optical signals of different wavelengths, and transmits the optical signals to one or more connected RTs (one or more of 120-1 to 120-n). Meanwhile, the base station signal is a baseband signal according to a fronthaul link standard such as Common Public Radio Interface (CPRI), Open Base Station Architecture Initiative (OBSAI), or Open Radio equipment Interface (ORI).

[0037] The COT 110 transmits the m base station signals to a switch device 130 .

[0038] 2, the COT 110 according to one embodiment of the present invention includes m signal processors 210-1 through 210-m, m laser modules 220-1 through 220-m, and a multiplexer 230.

[0039] Each of the m signal processors (hereinafter, collectively referred to as '210') processes a base station signal received from a DU (not shown). The signal processor 210 receives a base station signal, performs serial-to-parallel conversion, and outputs the signal, and includes known components such as a small form factor pluggable (SFP), a serializer, an FPGA, and a serial / parallelizer (SerDes).

[0040] Each of the M laser modules (hereinafter collectively referred to as '220') generates an optical signal of a corresponding wavelength with the base station signal output from the signal processor 210. For example, the laser module 220 generates an optical signal of a first wavelength λ1 through an optical signal of an m-th wavelength λ2 through an m-th wavelength λ3 through an m-th wavelength λ4 through an m-th wavelength λ5 through an m-th wavelength λ6 through an m-th wavelength λ7 through an m-th wavelength λ8 through an m-th wavelength λ9 through an m-th wavelength λ10 through an m-th wavelength λ11 through an m-th wavelength λ12 through an m-th wavelength λ13 through an m-th wavelength λ14 through an m-th wavelength λ15 through an m-th wavelength λ16 through an m-th wavelength λ17 through an m-th wavelength λ18 through an m-th wavelength λ19 through an m-th wavelength λ110 through an m- m Since the laser diode can output a laser beam, the laser controller has a known configuration such as a laser diode and a laser controller.

[0041] The optical signals generated by the m laser modules 220 are multiplexed through a multiplexer 230 and transmitted to at least one of the RTs 120-1 through 120-n.

[0042] Meanwhile, the base station signal output from each signal processor 210 is duplicated or branched and transmitted to the switch device 130. For example, the signal output from each signal processor 210 is tapped through a T-Drop and transmitted to the switch device 130.

[0043] In FIG. 2, it is assumed that the base station signal output from each signal processor 210 (i.e., the base station signal before being input to each laser module 220) is transmitted to the switch device 130, but the base station signal (i.e., the optical signal) output from each laser module 220 may also be transmitted to the switch device 130.

[0044] 1, RTs 120-1 through 120-n (hereinafter collectively referred to as '120') are devices located at cell sites. The RTs 120 are connected to the COTs 110 and transmit base station signals received from the COTs 110 to RUs (not shown).

[0045] The switch device 130 switches the base station signals received from the n COTs 110 connected thereto.

[0046] With further reference to FIG. 3, the switch device 130 includes an input port 310 , an output port 320 , a switch 330 , a communication modem 340 , and a switch controller 350 .

[0047] The input port 310 is configured for connection to one or more optical transmission devices (e.g., COT 110, etc.). The input port 310 receives a base station signal from the optical transmission device to which it is connected. For example, the input port 310 is a communication port to which an optical cable is connected.

[0048] The output port 320 is configured to connect to one or more optical transmission devices (e.g., COT 110, etc.), the measurement device 140, and / or the server 150 through the network 170. The output port 320 outputs the base station signal received through the input port 310 to the connected optical transmission device, and transmits the signal to the measurement device 140 and / or the server 150 through the network 170. For example, the output port 320 is also a communication port to which an optical cable is connected.

[0049] The switch 330 is configured to switch the connection between the input port 310 and the output port 320. The switch 330 performs a switching operation under the control of the switch controller 350. The input port 310 and the output port 320 are connected to each other according to pre-stored connection information. The connection information is information on the connection relationship between the input port 310 and the output port 320, and is information that is set and stored in a pre-stored storage space (not shown). For example, assuming that the input port 310 and the output port 320 each have three ports, the connection information includes related information such that the first input port is connected to the first output port, the second input port is connected to the second output port, and the third input port is connected to the third output port. In the above example, it is assumed that the number of ports of the input port 310 and the output port 320 is equal, but it goes without saying that the number of ports may be different.

[0050] The switch 330 can be any type of switch that can reconfigure the connection between the input port 310 and the output port 320, and therefore can be a crosspoint switch or a packet switch.

[0051] The communication modem 340 is configured to be connectable to the network 170 , and the communication modem 340 enables the switch device 130 to transmit and receive data to and from the measuring device 140 and / or the server 150 .

[0052] The switch controller 350 is a component that controls the overall operation of the switch device 130. The switch controller 350 controls the connection between the input port 310 and the output port 320 to be changed. For example, when an administrator operates the server 150 to transmit information for changing the connection state between the input port 310 and the output port 320 (hereinafter, referred to as "change information"), the connection state is changed accordingly. More specifically, the server 150 transmits the generated change information to the communication modem 340 through the network 170, and the communication modem 340 outputs the change information to the switch controller 350. The switch controller 350 analyzes the change information, and controls the switch 330 according to the analysis result to change the connection between the input port 310 and the output port 320 according to the change information. For example, the change information includes information that the first input port is connected to the third output port and the third input port is connected to the first output port, which is different from the connection relationship between the three input ports and the output ports in the above example.

[0053] The switch device 130 detects a base station signal corresponding to a request from an administrator or the like from among the plurality of received base station signals, and transmits the detected base station signal to the measuring device 140 and / or the server 150 .

[0054] An administrator or the like transmits information requesting transmission of one of the m base station signals input to the switch device 130 (hereinafter referred to as a 'base station signal transmission request') to the communication modem 340. The base station signal transmission request is generated by the measuring device 140 according to the operation of the measuring device 140 by the administrator, or is generated by the server 150 according to the operation of the server 150 by the administrator, and then transmitted to the communication modem 340. When the communication modem 340 receives the base station signal transmission request, it outputs it to the switch controller 350.

[0055] When the switch controller 350 receives the base station signal transmission request, the switch controller 350 transmits a part or the whole of the base station signal corresponding to the base station signal transmission request to the measuring device 140 and / or the server 150 .

[0056] It is assumed that the base station signal corresponding to the base station signal transmission request is the first base station signal. In this case, the switch controller 350 controls the switch 330 so that the first base station signal input to the switch 330 is transmitted to the measurement device 140. Under the control of the switch controller 350, the switch 330 connects the input port 310 to which the first base station signal is input and the output port 320 connected to the measurement device 140.

[0057] Alternatively, when the switch controller 350 receives a base station signal transmission request, it copies a base station signal corresponding to the base station signal transmission request and transmits the copied base station signal to the measurement device 140 and / or the server 150 .

[0058] It is assumed that the base station signal corresponding to the base station signal transmission request is the first base station signal. In this case, the switch controller 350 controls the switch 330 so that at least a portion of the first base station signal input to the switch 330 is duplicated. In this case, the switch 330 includes a configuration capable of at least partially duplicating the input signal. In addition, under the control of the switch controller 350, the switch 330 outputs the duplicated first base station signal to the output port 320 connected to the measurement device 140.

[0059] Depending on the embodiment, switch controller 350 controls switch 330 to output the replicated first base station signal to communication modem 340, and controls communication modem 340 to transmit the replicated first base station signal to measurement equipment 140 and / or server 150.

[0060] 1 again, the measurement device 140 receives a base station signal (i.e., a part / all or a duplicated signal of the base station signal transmitted from the switch device 130 in response to a base station signal transmission request) from the switch device 130. The measurement device 140 measures the received base station signal to determine the quality of the base station signal. The configuration and operation of the measurement device 140 for measuring the base station signal will be apparent to those skilled in the art, and detailed description thereof will be omitted.

[0061] The server 150 manages / controls and monitors the measurement device 140 connected through the network 170. For example, the server 150 transmits a base station signal transmission request to the measurement device 140, causing the measurement device 140 to receive and measure the base station signal. In another example, the server 150 receives information on the base station signal measurement result from the measurement device 140 and manages it. That is, the server 150 receives the measurement result from the measurement device 140 and determines whether the base station signal is normally transmitted and received.

[0062] The server 150 receives a base station signal directly from the switch device 130 connected thereto through the network 170, measures the received base station signal, and judges whether the signal is being transmitted and received normally.

[0063] In addition, the server 150 generates change information corresponding to the operation of the administrator. The server 150 transmits the generated change information to the switch device 130 through the network 170, and controls the switch device 130 to change the connection between the input port 310 and the output port 320.

[0064] FIG. 4 is a configuration diagram of a base station signal monitoring system according to another embodiment of the present invention, and FIG. 5 is a block diagram of an optical transmission device according to another embodiment of the present invention.

[0065] A base station signal monitoring system 400 according to another embodiment of the present invention illustrated in Fig. 4 differs from the base station signal monitoring system 100 illustrated in Fig. 1 in that it does not include a switch device 130. That is, the base station signal monitoring system 400 according to another embodiment of the present invention does not include a separate switch device 130, but includes a configuration for performing the function of the switch device 130 within each of COTs 410-1 to 410-n (hereinafter collectively referred to as '410').

[0066] 5, the COT 410 includes a COT switch 510, a COT communication modem 520, and a COT switch controller 530. The functions of the COT switch 510, the COT communication modem 520, and the COT switch controller 530 are similar to the functions of the switch 330, the communication modem 340, and the switch controller 350 of the switch device 130 in FIG.

[0067] That is, the COT switch 510 connects the m signal processors 210-1 to 210-m and the m laser modules 220-1 to 220-m according to connection information previously stored in a storage space (not shown) provided therein. The connection information in this example is information on the connection relationship between the m signal processors 210-1 to 210-m and the m laser modules 220-1 to 220-m, and is information previously set and stored in a storage space (not shown) provided therein. The connection information includes related information such that the first signal processor 210-1 is connected to the first laser module 220-1, the second signal processor 210-2 is connected to the second laser module 220-2, and the third signal processor 210-3 is connected to the third laser module 220-3. Also, as described above, the connection information can be changed in the future according to change information.

[0068] In addition, the COT communication modem 520 is configured to be connectable to the network 170, and via the COT communication modem 520, the COT switch device 510 receives data such as change information from the measurement device 140 and / or the server 150, and transmits base station signals, etc. to the measurement device 140 and / or the server 150.

[0069] The COT switch controller 530 controls the connection between the m signal processors 210-1 to 210-m and the m laser modules 220-1 to 220-m to be changed. This operation is the same as or similar to the method described for the change information with reference to FIG. 3, so a detailed description will be omitted.

[0070] In addition, the measurement device 140 generates information requesting transmission of one of the m base station signals input to the COT 110 (hereinafter, referred to as a 'base station signal transmission request'), and transmits the information to the COT communication modem 520. Upon receiving the base station signal transmission request, the COT communication modem 520 outputs the request to the COT switch controller 530.

[0071] When the COT switch controller 530 receives the base station signal transmission request, the COT switch controller 530 transmits a part or the whole of the base station signal corresponding to the base station signal transmission request to the measurement device 140 .

[0072] It is assumed that the base station signal corresponding to the base station signal transmission request is the first base station signal (i.e., the base station signal output from the first signal processor 210-1). In this case, the COT switch controller 530 controls the COT switch 510 so that the first base station signal input to the COT switch 510 is transmitted to the measurement device 140.

[0073] The COT switch 510 replicates the first base station signal under the control of the COT switch controller 530 and outputs it to the COT communication modem 520 , and the COT communication modem 520 transmits the first base station signal to the measurement device 140 .

[0074] Alternatively, the base station signal input to the COT switch 510 may be a signal that is output from each signal processor 210-1 to 210-m, and then a portion of the signal is coupled and input to the COT switch 510. The COT switch 510 transmits a base station signal corresponding to a base station signal transmission request to the measurement device 140 under the control of the COT switch controller 530.

[0075] As described above, the base station signal monitoring systems 100 and 400 according to an embodiment of the present invention include the switch devices 130 and 510 that can receive and switch base station signals from optical transmission devices (e.g., COTs, etc.), and the measurement device 140 remotely receives base station signals from the optical transmission devices 110 and 410, etc. through the switch devices 130 and 510 and analyzes the quality of the signals, etc. Therefore, according to the present invention, base station signals can be remotely monitored without the visit of an administrator.

[0076] Although the present invention has been described with reference to preferred embodiments thereof, those skilled in the art will understand that the present invention can be modified and changed in various ways without departing from the spirit and scope of the present invention as set forth in the following claims. [Explanation of symbols]

[0077] 100, 400: Base station signal monitoring system 110、410:COT(Central Office Terminal) 120: RT (Remote Terminal) 130: Switching device 140: Measuring equipment 150: Server

Claims

1. A plurality of first optical transmission devices each transmitting a plurality of base station signals to one or more second optical transmission devices; a measurement device for measuring one of the plurality of base station signals by a predetermined method; a switch device connected to the plurality of first optical transmission devices and the measurement device, and configured to switch connections between a plurality of input ports and a plurality of output ports so that the base station signal is transmitted from any one of the plurality of first optical transmission devices to the one or more second optical transmission devices or the measurement device; Each of the plurality of first optical transmission devices a signal processor for processing a base station signal in a predetermined manner; a laser module connected to the signal processor, the laser module converting the base station signal output from the signal processor into an optical signal; Equipped with The switch device is coupled between the signal processor and the laser module.

2. The base station signal monitoring system of claim 1, wherein the switch device receives a base station signal transmission request from the measurement device, switches connections between the multiple input ports and the multiple output ports, and transmits at least a portion of the base station signal corresponding to the base station signal transmission request to the measurement device.

3. The base station signal monitoring system of claim 1 , wherein the switch device receives a base station signal transmission request from the measurement device, replicates at least a portion of the base station signal corresponding to the base station signal transmission request, and transmits the replicated signal to the measurement device.

4. a server connected to the switch device and configured to transmit, to the switch device, change information for changing a connection state between the input ports and the output ports; 2. The base station signal monitoring system according to claim 1, wherein said switch device controls connections between said plurality of input ports and said plurality of output ports in accordance with said change information.

5. a plurality of input ports respectively coupled to a plurality of first optical transmission devices; a plurality of output ports, each of which is coupled to one of the one or more second optical transmission devices and the measurement device; a switch that switches connections between the plurality of input ports and the plurality of output ports so that a base station signal is transmitted from any one of the plurality of first optical transmission devices to one of the one or more second optical transmission devices or the measurement device; A switch controller that controls the switch in accordance with predetermined connection information, a switch device coupled between the signal processors of the first optical transmission devices and the laser modules of the first optical transmission devices; Switch device.

6. a communication modem for receiving a base station signal transmission request from the measuring device; Further equipped with The switch device of claim 5 , wherein the switch controller controls the switch such that at least a portion of the base station signal corresponding to the base station signal transmission request is transmitted to the measurement device.

7. a communication modem for receiving a base station signal transmission request from the measuring device, The switch device of claim 5, wherein the switch controller duplicates at least a portion of the base station signal corresponding to the base station signal transmission request, and controls at least one of the switch and the communication modem so that at least a portion of the duplicated base station signal is transmitted to the measurement device.

8. Further comprising a communication modem for receiving change information for changing a connection state between the plurality of input ports and the plurality of output ports, The switch device according to claim 5 , wherein the switch controller controls the switch in accordance with the change information.

9. a plurality of signal processors each configured to process a plurality of base station signals in a predetermined manner; a plurality of laser modules respectively connected to the plurality of signal processors, converting the plurality of base station signals output from the plurality of signal processors into optical signals, and transmitting the converted optical signals to at least one other optical transmission device; a switch configured to switch connections between the signal processors and the laser modules such that each of the base station signals is input to a corresponding one of the laser modules; a switch controller for controlling the switch according to predetermined connection information; a communication modem configured to receive a base station signal transmission request from a measurement device connected thereto; Equipped with The switch controller controls the switch such that at least a portion of the base station signal corresponding to the base station signal transmission request among the plurality of base station signals is transmitted to the measurement device.

10. The optical transmission device described in Claim 9, wherein the switch controller duplicates at least a portion of a base station signal among the plurality of base station signals that corresponds to the base station signal transmission request, and controls at least one of the switch and the communication modem so that at least the portion of the duplicated base station signal is transmitted to the measuring device.

11. The communication modem receives change information for changing a connection state between a plurality of input ports and a plurality of output ports from a server to which the communication modem is connected; The optical transmission device according to claim 9 , wherein the switch controller controls the switch in accordance with the change information.

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