KR100719467B1 - Outside relay system - Google Patents

Abstract

The present invention relates to an outdoor relay system for providing a communication service outdoors. The outdoor relay system includes a first relay device and at least one second relay device. The first relay device converts or amplifies the first frequency signal to generate a second frequency signal, and transmits the generated second frequency signal. The second relay device converts or amplifies a second frequency signal transmitted from the first relay device to generate a third frequency signal, and transmits the generated third frequency signal to the terminal. Here, the first relay device and the second relay device are installed outdoors in a dense building area. In the outdoor relay system, since the relay devices are connected to the wiring between the poles, a separate line is not required to connect the relay devices. Thus, the installation cost of the relay system is reduced.

Relay, Hub, Remote, Outdoor

Description

Outdoor relay system {OUTSIDE RELAY SYSTEM}

1 is a perspective view showing a conventional relay system.

2A is a view schematically showing an outdoor relay system according to a first embodiment of the present invention.

FIG. 2B conceptually illustrates the outdoor relay system of FIG. 2A.

2C is a perspective view illustrating a communication process of a remote unit.

3 is a block diagram illustrating relay apparatuses of the present invention.

4 is a plan view illustrating a gain adjusting process of the second relay apparatus according to an exemplary embodiment of the present invention.

5 is a diagram illustrating an outdoor relay system according to a second preferred embodiment of the present invention.

6 is a diagram illustrating a relay system according to a third preferred embodiment of the present invention.

The present invention relates to an outdoor relay system, and more particularly to an outdoor relay system for providing a communication service in the outdoors.

The relay system refers to a system for relaying between the terminals to enable smooth communication between the terminals. In particular, in an area where buildings are concentrated, there is an area (hereinafter, referred to as a "shading area") in which radio waves are blocked by a building or the like. In these shaded areas, radio waves are not well received at the receiving terminal, so that the call is not possible or the call quality is poor. Therefore, in densely populated areas, relay devices were installed inside each building to improve communication services.

1 is a perspective view showing a conventional relay system.

Referring to FIG. 1, hubs 102 and remote units 106 are installed in a building.

The hub 102 is a relay device and transmits a frequency signal transmitted from a base station or an optical relay station through a donor antenna 104 to the remote units 106.

Each of the remote units 106 transmits the frequency signal transmitted from the hub 102 to the destination terminal located in the corresponding area through a service antenna 108. However, in the case of a multi-storey building, since there are many interlayer propagation obstacles, the remote unit 106 is separately installed for each floor as shown in FIG. 1. In addition, the hub 102 and each of the remote units 106 are electrically connected through a communication line, for example, a coaxial cable. Therefore, many coaxial cables were required to install such a relay system. In addition, separate communication lines have been installed to transmit communication signals from the optical relay station or the base station to the hub 102. Therefore, the cost required for installing the relay system was excessive.

It is an object of the present invention to provide a relay system capable of expanding the communication service area while reducing the installation cost.

In order to achieve the above object, the outdoor relay system according to a preferred embodiment of the present invention includes a first relay device and at least one second relay device. The first relay device converts or amplifies the first frequency signal to generate a second frequency signal, and transmits the generated second frequency signal. The second relay device converts or amplifies a second frequency signal transmitted from the first relay device to generate a third frequency signal, and transmits the generated third frequency signal to the terminal. Here, the first relay device and the second relay device are installed outdoors in a dense building area.

An outdoor relay system according to another preferred embodiment of the present invention includes a hub and at least one remote unit. The hub converts or amplifies the first frequency signal to generate a second frequency signal, and transmits the generated second frequency signal. The remote unit converts or amplifies the second frequency signal transmitted from the first relay device to generate a third frequency signal, and transmits the generated third frequency signal to a terminal located indoors. Here, some of the hubs are installed in the wiring between the poles in a dense area of the building, the other hub portion is installed on the poles, the remote unit is installed on the wiring, the hub is the gain of the remote unit To control.

The outdoor relay device according to the preferred embodiment of the present invention includes a first sub relay device and a second sub relay device. The first sub relay apparatus communicates with a remote unit. The second sub relay device is connected to the first sub relay device. Here, the first sub relay device is installed on the wiring between the poles located outdoors, the second sub relay device is installed on the pole.

In the outdoor relay system according to the present invention, since the relay devices are connected to the wiring between the poles, a separate communication line for connecting the relay devices is not required. Therefore, the installation cost of the relay system can be reduced.

In addition, in the outdoor relay system according to the present invention, since only one second relay device and one service antenna can provide a communication service to a terminal located in a multi-storey building, the number of second relay devices and service antennas can be reduced. .

In addition, in the relay system of the present invention, since the second relay apparatus located outdoors provides a communication service wirelessly to a terminal located indoors, the communication service area can be expanded.

Moreover, in the relay system of the present invention, since some of the components of the first relay device are installed on the pole, immediate repair in case of failure is possible.

Hereinafter, with reference to the accompanying drawings will be described in detail preferred embodiments of the outdoor relay system according to the present invention.

FIG. 2A is a diagram schematically illustrating an outdoor relay system according to a first preferred embodiment of the present invention, and FIG. 2B is a diagram conceptually illustrating the outdoor relay system of FIG. 2A. 2C is a perspective view illustrating a communication process of a remote unit.

Referring to FIG. 2A, the outdoor relay system of the present invention is a relay system used in a dense building area, and includes a first relay device 202 and at least one second relay device 206.

The first relay device 202 receives a first frequency signal transmitted from a central management unit or an apparatus such as an optical repeater, a base station, etc., located outside the dense building through a donor antenna 204, and receives the received The first frequency signal is converted or amplified to generate a second frequency signal. Then, the first relay device 202 transmits the generated second frequency signal to the second relay device 206. Here, the frequency signal is a signal having a predetermined frequency and includes multimedia data such as voice data. For example, when the frequency signal is used in a mobile communication system, the frequency signal has a frequency of about 1.8 kHz.

In addition, the first relay device 202 is installed in the communication line 210 between the communication line support units 200, such as electric poles, as shown in Figure 2a. Here, the communication line 210 is a line capable of communication, and the communication line support unit 200 is a member supporting the communication line 210. However, hereinafter, the communication line support 200 and the communication line 210 for the convenience of explanation, each of the electric poles and wiring that exist in a large number of building dense areas.

The first relay device 202 according to an embodiment of the present invention is a hub.

Although not mentioned above, the first relay device 202 transmits a signal transmitted from the second relay device 206 to the central management unit or another relay device through the donor antenna 204. In addition, the first relay device 202 may supply power to the second relay device 206.

The second relay device 206 converts or amplifies the second frequency signal transmitted from the first relay device 202 via the wiring 210 to generate a third frequency signal. Thereafter, the second relay device 206 wirelessly transmits the generated third frequency signal to the terminal located in the building 214 as shown in FIG. 2C through the service antenna 208. . Here, the terminal is a device capable of transmitting and receiving data, such as a mobile communication terminal, a personal digital assistant (PDA).

In addition, the second relay device 206 is provided in the wiring 210 as shown in FIG. 2A. In this case, since the intensity of the third frequency signal is adjustable, the second relay device 206 may provide a communication service to the entire multi-story building 214, as shown in FIG. 2C.

The second relay device 206 according to an embodiment of the present invention is a remote unit.

Referring to FIG. 2B, the second relay devices 206 are respectively connected to the distributors 212, and the frequency signal transmitted from the first relay device 202 is passed through the distributors 212 to the second relay devices. 206 is sent. In this case, since the frequency signal is transmitted to the second relay devices 206 through the wiring 210, the strength of the frequency signal reaching the second relay device located at the rear end is the second relay device located at the front end. Is less than the strength of the frequency signal to reach. Accordingly, the relay system according to an embodiment of the present invention sets the distribution ratio of the distributors 212 differently as shown in FIG. 2B. For example, if a frequency signal corresponding to 100% strength is output from the first relay device 202, each of the distributors 212 transmits a frequency signal corresponding to 20% power to the corresponding second relay device and then 80 The frequency signal corresponding to% is transmitted to the divider of the next stage. Thus, each second relay device 206 can receive a frequency signal of similar strength.

Hereinafter, the relay system of the present invention and the conventional relay system will be compared.

In conventional relay systems, hubs and remote units have been installed inside buildings to provide communication services in shadowed areas that exist in dense areas of buildings. Here, a separate communication line had to be newly installed for the electrical connection between the hub and the remote unit. In addition, since one remote unit cannot serve other floors except the corresponding floor, a remote unit had to be installed in each floor. Therefore, the installation of the communication line was required a lot, so the installation cost of the relay system was excessively required. In addition, since the remote unit is installed indoors and the service range is constantly limited, it is not possible to provide a communication service to a terminal existing outdoors.

On the other hand, in the relay system of the present invention, the relay devices 202 and 206 are installed outdoors to provide a communication service in a shaded area existing in a dense building area. In particular, since the relay devices 202 and 206 are connected to the wiring between poles which are installed nationwide, a separate communication line for electrically connecting the relay devices 202 and 206 is not required. In addition, since the second relay device 206 is installed outdoors, it is possible to provide a communication service using only one service antenna 208 unlike the conventional relay system. Thus, the installation cost of the relay system has been reduced. In addition, since the second relay device 206 is located outdoors and wirelessly provides communication services indoors, it is possible to provide excellent quality communication services to both indoor and outdoor terminals.

In the relay system according to another embodiment of the present invention, the relay devices 202 and 206 are mounted in the booster, respectively, and the boosters in which the relay devices 202 and 206 are mounted are connected to the wiring 210. . Thus, the relay devices 202 and 206 are securely protected. Of course, the boosters may include relays 202 and 206 as well as corresponding distributors. In addition, since the public is unlikely to think that the boosters include relay devices 202 and 206, the complaint case can be reduced.

3 is a block diagram illustrating relay apparatuses of the present invention.

Referring to FIG. 3, the first relay device 202 may include a first RF module 300, a first network management system 302, a first transceiver 304, a battery 306, and a power supply. Device 308.

The second relay device 206 includes a second transceiver 310, a second RF module 312 and a second network manager 314.

The first RF module 300 converts or amplifies the first frequency signal input through the donor antenna 204 to generate the second frequency signal, and transmits the generated second frequency signal to the first transceiver 304. To send).

Subsequently, the first transceiver 304 transmits the transmitted second frequency signal to the second transceiver 310.

Subsequently, the second transceiver 310 transmits the transmitted second frequency signal to the second RF module 312.

Thereafter, the second RF module 312 converts or amplifies the transmitted second frequency signal to generate the third frequency signal, and transmits the generated third frequency signal to the terminal through the service antenna 208. send.

The second network manager 314 detects a state of the second relay device 206 and transmits an NMS signal having the detected information to the first network manager 302 through the transceivers 310 and 304.

In this case, the first network manager 302 analyzes the transmitted NMS signal and manages the overall operation of the second relay device 206 under the control of the central management unit or according to a predetermined program according to the analysis.

In the relay system according to another embodiment of the present invention, the battery 306 and the power supply 308 are not included in the first relay device 202 and may exist as separate devices.

4 is a plan view illustrating a gain adjusting process of the second relay apparatus according to an exemplary embodiment of the present invention. However, for convenience of description, the first relay device 202 and the second relay device 206 will be referred to as hubs and remote units, respectively.

Referring to FIG. 4, the remote unit 206 transmits a first NMS signal having its own state information to the hub 202.

Subsequently, the hub 202 analyzes the transmitted first NMS signal, and transmits a first status information signal having information on the analysis to the central management unit 400. Of course, the hub 202 according to another embodiment of the present invention may immediately transmit the received first NMS signal to the central management unit 400 without analyzing the transmitted first NMS signal.

Subsequently, the central management unit 400 analyzes the first state information signal or the first NMS signal to determine the state of the remote unit 206.

Thereafter, the central management unit 400 determines whether to adjust the gain of the remote unit 206 according to the determination.

Since the remote environments of the remote units are all different, the remote units may not have the same output strength for normal communication service. In addition, when the surrounding environment of the remote unit is changed, the intensity of the signal output from the remote unit should be changed.

The central management unit 400 may determine that the corresponding remote unit 206 may provide a normal communication service regardless of the surrounding environment state through the first state information signal, and may not change the gain of the remote unit 206. Do not.

On the other hand, the central management unit 400 may determine that it is necessary to change the strength, that is, the gain, of the signal of the corresponding remote unit 206 due to the influence of the surrounding environment through the first state information signal.

Subsequently, the central management unit 400 transmits the determination signal having the determination and the information on the determination to the hub 202.

Subsequently, the hub 202 amplifies the intensity of the output signal, that is, the second frequency signal, in accordance with the transmitted determination signal. Hub 202 then transmits the amplified second frequency signal to remote unit 206. Therefore, since the intensity of the second frequency signal received by the remote unit 206 is different from the existing intensity, the intensity of the third frequency signal output from the remote unit 206 is amplified. In other words, the gain of the remote unit 206 is changed.

The hub 202 according to another embodiment of the present invention may transmit a gain control signal to the remote unit 206 according to the transmitted determination signal. In this case, the remote unit 206 changes its gain in accordance with the transmitted gain control signal. Thus, the intensity of the third frequency signal output from the remote unit 206 is changed.

Subsequently, the above-mentioned procedure is repeatedly performed.

The relay system of the present invention provides a normal communication service through the above process.

5 is a diagram illustrating an outdoor relay system according to a second preferred embodiment of the present invention.

Referring to FIG. 5, the relay system of the present invention includes a first relay device 502 and a second relay device 506.

Since the relay devices 502 and 506 perform the same functions as the components of the first embodiment, the following description of the functions is omitted.

The first relay device 502 includes a first sub relay device 502a and a second sub relay device 502b.

The first sub relay device 502a includes components in which the failure of the first relay device 502 is less likely to occur, and the second sub relay device 502b frequently occurs in the first relay device 502. Includes components that become

Thereafter, the second sub relay apparatus 502b, in which a breakdown frequently occurs, is provided at the lower end of the pole 500. Therefore, when the second sub relay apparatus 502b fails, immediate repair is possible.

For example, referring to FIG. 3, the first sub relay apparatus 502a includes a first RF module 300 and a first transceiver unit 304, and the second sub relay apparatus 502b includes a first network. A management unit 302, a battery 306, and a power supply 308.

Of course, it will be apparent to those skilled in the art that the design of the first relay device 502 may vary depending on the situation, and that such changes do not affect the scope of the present invention.

6 is a diagram illustrating a relay system according to a third preferred embodiment of the present invention.

Referring to FIG. 6, the relay system of the present invention includes a first relay device 602, a second relay device 604, and an extender 606.

Since the relay devices 602 and 604 perform the same functions as the components of the first embodiment, the description thereof will be omitted.

The expansion device 606 extends the connection distance between the first relay device 602 and the second relay device 604. For example, the second relay device located at the rear end may be far from the first relay device 602 so that the frequency signal output from the first relay device 602 may not reach the second relay device. In this case, the expansion device 606 serves to amplify and transmit the frequency signal transmitted from the first relay device 602 to the second relay device 604. Accordingly, the relay system of the present invention can provide a communication service in a wider range.

Hereinafter, the installation method of the expansion device 606 will be described in detail, for example. Here, suppose that the output of the first relay device 602 is 15 dBm, and the communication line loss is 1 dB / 10 m. In addition, let the value lost during transmission from the distributor (eg, 3: 7 distributor) to the second relay device 604 be 6 dB, and the value lost while passing through the distributor be 2 dB. In addition, when a signal having a value between -30 dBm and 0 dBm is input to the second relay device 604, it is assumed that the second relay device 604 detects the input signal and performs normal operation.

Hereinafter, for convenience of description, the first relay device 602 and the second relay device 604 are referred to as hubs and remote units, respectively, and the remote units 204 are connected in series from the hub 602.

When the first remote unit closest to the hub 602 is 120m away from the hub 602, the first input value input to the first remote unit is expressed by Equation 1 below.

1st input value = 15dBm (output value of hub 602)-12dB (communication line loss)-6dB (value lost while transmitting from the first splitter to the first remote unit) = -3dBm

As shown in Equation 1, since the input value (-3dBm) input to the first remote unit is located between −30 dBm and 0 dBm, the first remote unit may perform a normal operation.

Next, assume that a second remote unit located after the first remote unit is 150m from the hub 602. In this case, the second input value input to the second remote unit is expressed by Equation 2 below.

2nd input = 15 dBm (output of hub 602)-12 dB (communication line loss)-2 dB (value lost while passing through the first divider)-3 dB (communication line loss)-6 dB (second from the second divider) 2 Loss value during transmission to the remote unit) = -8 dBm

As shown in Equation 2, since the input value (-8 dBm) input to the first remote unit is located between −30 dBm and 0 dBm, the second remote unit may perform a normal operation.

Subsequently, assume that the third remote unit located after the second remote unit is 200 m from the hub 602. In this case, the third input value input to the third remote unit is expressed by Equation 3 below.

3rd input = 15dBm (output of hub 602)-12dB (communication line loss)-2dB (value lost while passing the first splitter)-3dB (communication line loss)-2dB (passing the second divider Value lost during operation)-5 dB (communication line loss)-6 dB (value lost during transmission from the third splitter to the third remote unit) = -15 dBm

As shown in Equation 3, since the input value (-15 dBm) input to the third remote unit is located between -30 dBm and 0 dBm, the second remote unit can perform a normal operation.

Next, assume that a fourth remote unit located after the third remote unit is at a distance of 330 m from the hub 602. In this case, the fourth input value input to the fourth remote unit is expressed by Equation 4 below.

4th input = 15 dBm (output of hub 602)-12 dB (communication line loss)-2 dB (value lost while passing the first splitter)-3 dB (communication line loss)-2 dB (passing the second divider) Value lost during operation)-5 dB (communication line loss)-2 dB (value lost while passing through the third distributor) -13 dB (communication line loss)-6 dB (loss during transmission from the fourth distributor to the fourth remote unit) Value) = -30dBm

As shown in Equation 4, since the input value input to the fourth remote unit is -30 dB and is located between -30 dBm and 0 dBm, the fourth remote unit operates normally. However, since the remote units located after the fourth remote unit exceed the input range, the desired operation cannot be performed. Therefore, in the relay system of the present invention, the expansion device 606 is installed near the position corresponding to the limit input range of the remote unit. In this case, since the expansion device 606 amplifies the input signal, the signal output from the expansion device 606 may have, for example, 15 dBm, so that the distance from the hub 602 to the remote unit 604 is Is expanded. That is, the input range of the expansion device 606 may be set from, for example, -24 dBm to a predetermined range (for example, -44 dBm).

In short, the relay system of the present invention can determine the location where the expansion device 606 should be installed using the above method.

Preferred embodiments of the present invention described above are disclosed for purposes of illustration, and those skilled in the art having various ordinary knowledge of the present invention may make various modifications, changes, and additions within the spirit and scope of the present invention. Additions should be considered to be within the scope of the following claims.

As described above, in the outdoor relay system according to the present invention, since the relay devices are connected to the wiring between the poles, a separate communication line for connecting the relay devices is not required. Therefore, there is an advantage that the installation cost of the relay system is reduced.

In addition, in the outdoor relay system according to the present invention, since only one second relay device and one service antenna can provide a communication service to a terminal located in a multi-storey building, the number of second relay devices and service antennas can be reduced. There is an advantage.

In addition, in the relay system of the present invention, since the second relay device located outdoors provides a communication service wirelessly to a terminal located indoors, there is an advantage that the communication service area is extended.

Moreover, in the relay system of the present invention, since some of the components of the first relay device are installed on the pole, there is an advantage that immediate repair is possible in case of failure.

Claims (17)

delete A hub for converting or amplifying a first frequency signal to generate a second frequency signal, and transmitting the generated second frequency signal; And At least one remote unit for converting or amplifying the second frequency signal transmitted from the hub to generate a third frequency signal, and transmits the generated third frequency signal to the terminal, And the hub and the remote unit are installed outdoors in a dense building area, and the hub controls the gain of the remote unit. A first relay device converting or amplifying a first frequency signal to generate a second frequency signal, and transmitting the generated second frequency signal; And At least one second relay device for generating a third frequency signal by converting or amplifying the second frequency signal transmitted from the first relay device, and transmitting the generated third frequency signal to the terminal, The first relay device and the second relay device are installed outdoors in a dense building area, the first relay device controls the gain of the second relay device, and at least one of the relay devices. The relay device is an outdoor relay system, characterized in that installed in the wiring between the poles located outdoors. 4. The outdoor relay system of claim 3, wherein at least one of the relay devices is installed in a booster, and the booster is installed in the wiring. A first relay device converting or amplifying a first frequency signal to generate a second frequency signal, and transmitting the generated second frequency signal; At least one second relay device for converting or amplifying a second frequency signal transmitted from the first relay device to generate a third frequency signal, and transmitting the generated third frequency signal to a terminal; And An extender for electrically connecting the first relay device and the second relay device, And the first relay device and the second relay device are installed outdoors in a dense building area, and the first relay device controls a gain of the second relay device. The apparatus of claim 5, wherein at least one of the relay devices is installed in a wiring between electric poles located outdoors. And the expansion device is also provided on the wiring line. delete A first relay device converting or amplifying a first frequency signal to generate a second frequency signal, and transmitting the generated second frequency signal; And At least one second relay device for generating a third frequency signal by converting or amplifying the second frequency signal transmitted from the first relay device, and transmitting the generated third frequency signal to the terminal, The first relay device and the second relay device are installed outdoors in a dense building area, the first relay device controls the gain of the second relay device, and the second relay devices are in series with each other. Outdoor relay system, characterized in that connected to the enemy. A first relay device converting or amplifying a first frequency signal to generate a second frequency signal, and transmitting the generated second frequency signal; And At least one second relay device for generating a third frequency signal by converting or amplifying the second frequency signal transmitted from the first relay device, and transmitting the generated third frequency signal to the terminal, The first relay device and the second relay device is installed outdoors in a dense building area, the first relay device controls the gain of the second relay device, the first relay device, An RF module for amplifying the first frequency signal; A transceiver for transmitting the second frequency signal to the second relay device; And Outdoor relay system, characterized in that it comprises a power supply for supplying power to the RF module and the transceiver. The outdoor relay system of claim 9, wherein the RF module and the transceiver are installed in wirings between poles located outdoors, and the power supply device is installed in the poles. The method of claim 10, wherein the first relay device, Including a network management unit for managing the second relay device, The network management unit is an outdoor relay system, characterized in that installed on the pole. A first relay device converting or amplifying a first frequency signal to generate a second frequency signal, and transmitting the generated second frequency signal; And At least one second relay device for generating a third frequency signal by converting or amplifying the second frequency signal transmitted from the first relay device, and transmitting the generated third frequency signal to the terminal, The first relay device and the second relay device are installed outdoors in a dense building area, the first relay device controls the gain of the second relay device, and the first relay device includes the first relay device. 2, the outdoor relay system, characterized in that to supply power to the relay device. A hub for converting or amplifying a first frequency signal to generate a second frequency signal, and transmitting the generated second frequency signal; And At least one remote unit for generating a third frequency signal by converting or amplifying the second frequency signal transmitted from the first relay device, and transmitting the generated third frequency signal to a terminal located indoors, Some of the hubs are installed in the wiring between the poles in a dense building area, the other hub portion is installed on the poles, the remote unit is installed on the wires, and the hub controls the gain of the remote unit. Outdoor relay system, characterized in that. A first sub relay apparatus communicating with the remote unit; And Including a second sub relay device connected to the first sub relay device, And the first sub relay apparatus is installed on a wire between poles located outdoors, and the second sub relay apparatus is installed on the pole. The method of claim 14, wherein the first sub relay device, And an RF module for converting or amplifying a first frequency signal input from the outside to generate a second frequency signal, and transmitting the generated second frequency signal to the remote unit. The method of claim 14, wherein the second sub relay device, And a power supply device for supplying power to the first sub relay device. The method of claim 14, wherein the second sub relay device, The outdoor relay device, further comprising a network management unit for controlling the gain of the remote unit.

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