KR100701899B1 - Apparatus and method of processing Digital Multimedia Broadcasting signal in mobile communication system - Google Patents

Abstract

The present invention minimizes facility costs for providing DMB services by processing DMB (Digital Multimedia Broadcasting) signals through base stations and optical relay stations of existing mobile communication systems. Disclosed are a method and apparatus for processing digital multimedia broadcasting signals of a mobile communication system capable of eliminating shadow areas.

Description

Apparatus and method of processing Digital Multimedia Broadcasting signal in mobile communication system             

1 is a block diagram illustrating an optical relay station used in a general mobile communication system.

2 is a block diagram illustrating a connection between a general base station and an optical relay station.

3 is a block diagram illustrating a mobile communication system according to a preferred embodiment of the present invention.

4 is a block diagram illustrating a DMB signal processing apparatus of a mobile communication system according to a preferred embodiment of the present invention.

5 is a flowchart showing step by step a control procedure of a mobile communication system according to an embodiment of the present invention;

<Description of Symbols for Main Parts of Drawings>

100: base station

110: BTS (Base Transceiver Station)

120: master

130: DMB (Digital Multimedia Broadcasting) master processing unit

131: coupler unit 132: all-optical signal conversion unit

133: DMB receiving amplifier 200: optical relay station

210: repeater 220: slave

230: DMB slave processing unit 231: decoupler unit

232: optical / electric signal converter 233: DMB transmitter

300: mobile terminal 400: DMB terminal

The present invention relates to a method and apparatus for processing digital multimedia broadcasting signals in a mobile communication system. More particularly, the present invention relates to digital multimedia broadcasting of a mobile communication system capable of processing DMB signals through respective devices of an existing mobile communication system. A signal processing method and apparatus are provided.

The base station system, which is a equipment for processing traffic for providing a mobile communication service in a mobile communication system, is very expensive and takes a method of processing traffic through a relay station.

That is, in terms of communication traffic in the mobile communication system, most of the subscribers are concentrated in a part of the total area for providing the mobile communication service (for example, a large city or a densely populated area), and the communication traffic is concentrated. Very little traffic is generated in the remaining area (eg, highways, mountainous areas).

Therefore, in a mobile communication system, a base station that requires a lot of installation and maintenance costs in order to expand coverage that provides a low-cost mobile communication service for major areas such as highways and mountainous areas where traffic is low but coverage is important in terms of coverage. It is more efficient to use a relay station instead. In addition, a relay station is used to provide a mobile communication service while eliminating the blanket area caused by the topographical influence.

1 is a block diagram illustrating an optical relay station used in a general mobile communication system.

As shown in FIG. 1, an optical relay station 20 having similar coverage to each of the base stations 11 and 12 is connected to an adjacent base station 11 through an optical cable.

The base stations 11 and 12 transmit a mobile communication signal received from a control station (not shown) to each mobile terminal 30 within the coverage, or transmit a mobile communication signal received from each mobile terminal 30 to the control station. By transmitting, a call for providing a mobile communication service to each mobile terminal is established.

The base stations 11 and 12 convert the base station signal corresponding to the mobile communication signal into an optical signal when the mobile terminal 30 to transmit the mobile communication signal received from the control station is included in the coverage of the optical relay station 20. Then, the base station signal converted into an optical signal through the optical cable is transmitted to the optical relay station (20).

The optical relay station 20 converts an optical signal received through an optical cable into a base station signal of an RF signal method and transmits the signal to a corresponding mobile terminal 30, and converts the base station signal received from the mobile terminal 30 into an optical signal, Transmission to the base station 11 through the optical cable.

The base station 11 converts an optical signal received from the optical relay station 20 through an optical cable into a base station signal and transmits the RF signal to a control station, thereby allowing the mobile terminal 30 to be included in the coverage of the optical relay station 20. Provides mobile communication services through.

2 is a block diagram illustrating a connection between a general base station and an optical relay station.

2, the base station 10 and the optical relay station 20 are connected by an optical cable, and the base station 10 is a base transceiver station (BTS) for processing mobile communication signals received from a control station (not shown) ( 10a) and a master 10b for converting the base station signal corresponding to the mobile communication signal of the RF signal type into an optical signal and transmitting the optical signal to the optical relay station 20 through an optical cable.

In addition, the optical relay station 20 includes a slave 20b for converting an optical signal received from the base station 10 into a base station signal of an RF signal method.

Then, the slave 20b of the optical relay station 20 converts the received base station signal into an optical signal and transmits it to the base station 10 through the optical cable.

The master 10b of the base station 10 converts the received optical signal into a base station signal of an RF signal method and transmits the received optical signal to the BTS 10a, and the BTS 10a transmits the received base station signal to the control station. The mobile communication service is provided to the mobile terminal 30 included in the coverage of 20.

As shown in FIG. 2, the base station 10 and the optical relay station 20 are connected in a master / slave manner, and the optical relay station 20 does not have a call processing capability. The base station signal is relayed to the base station 10 connected by the optical cable.

As described above, the mobile communication system is a mobile communication in the radio shadow area that is inevitably generated due to a place, a terrain, a feature, etc., where a small amount of call cannot receive the mobile communication service by the base station 10 at a low cost through the optical relay station 20. The service is provided.

Meanwhile, according to the development of broadcasting technology and the demand of various multimedia broadcasting services of consumers, the concept of digital multimedia broadcasting (DMB) has been introduced.

DMB (Digital Multimedia Broadcasting) is a concept of mobile broadcasting service. In order to improve the disadvantage that it is difficult to watch broadcasting service while moving in the conventional analog system, it is possible to move high quality on up to 7-inch screen based on digital technology. It is to provide a broadcast service. Such DMB can provide compact disk (CD) level sound quality and data service, and encompasses all audio, video and data services.

DMB service can be classified into terrestrial DMB method and satellite DMB method according to transmission media, and terrestrial DMB method is a concept of multimedia broadcasting for mobile reception using channels such as VHF Nos. 8 and 12, which are currently empty. If you split it, you get three blocks, which use two to four channels of audio per block or three to four channels of audio per video.

Unlike the terrestrial DMB method, the satellite DMB method uses a satellite to broadcast multimedia, and the urban area with low reception rate uses a kind of repeater called a gap filler. The satellite DMB system will operate 39 channels, including 11 videos, 25 audios, and 3 data, and will mainly serve mobile terminals.

However, in order to provide a DMB service, a separate DMB repeater must be installed, which causes a problem in that subscribers to be provided with the DMB service have to pay a fee corresponding to the DMB repeater and a separate installation cost.

Therefore, there is a need to find a way to provide consumers with low cost DMB services that are increasing in interest today. That is, a method of providing a DMB service to consumers by interworking with an existing mobile communication system should be sought.

Accordingly, an object of the present invention is to solve the shadow area of the DMB service that is inevitably generated by processing the DMB signal through the base station and the optical relay station of the existing mobile communication system, and to provide the facility cost for providing the DMB service. The present invention provides a method and apparatus for processing digital multimedia broadcasting signals in a mobile communication system.

In order to achieve the above object, a mobile communication system according to an embodiment of the present invention includes a reception amplification unit for amplifying a digital multimedia broadcasting (DMB) signal according to a predetermined predetermined amplification rate, and the DMB signal amplified by the reception amplification unit. A first signal converter converting a first optical signal, a second signal converter converting a base station signal for providing a mobile communication service into a second optical signal, and the first signal converter and the second signal converter A base station including a coupler unit configured to transmit a plurality of optical signals generated by mixing a plurality of optical signals converted by each; A decoupler unit for classifying the multiple optical signals received from the coupler unit of the base station into a plurality of optical signals according to an optical wavelength, and a third unit converting the third optical signal classified by the decoupler unit into a base station signal which is an RF signal A signal converter, a fourth signal converter for converting the fourth optical signal classified by the decoupler into a DMB signal as an RF signal, and a repeater for transmitting the base station signal converted by the third signal converter to a terminal within coverage A relay station including a transmitter for transmitting the DMB signal converted by the fourth signal converter to a terminal within coverage; And an optical cable connected to the coupler portion of the base station and the decoupler portion of the relay station to transmit the multiple optical signals to the decoupler portion.
The coupler unit generates the multiple optical signal according to the respective optical signals according to a wavelength division multiplexing technique.
The coupler unit generates the multiple optical signals by setting different optical wavelengths of the optical signals.
Each signal converter converts an electrical signal of a radio frequency (RF) signal method into an optical signal.
A base station of a mobile communication system according to an embodiment of the present invention includes a reception amplifying unit for receiving a DMB signal for providing a digital multimedia broadcasting (DMB) service and amplifying a predetermined amplification rate; A first optical signal converter converting the DMB signal amplified by the reception amplifier into an optical signal; A second optical signal conversion unit converting a base station signal for providing a mobile communication service into an optical signal; And generating a plurality of optical signals by the first optical signal converter and the second optical signal converter according to a wavelength division multiplexing technique, and then transmitting the multiple optical signals to the relay station through an optical cable. It includes a coupler portion.
A relay station of a mobile communication system according to an embodiment of the present invention classifies a multiple optical signal received from the base station through the optical cable into an optical signal corresponding to a base station signal and a digital multimedia broadcasting (DMB) signal according to an optical wavelength. part; A third optical signal converter converting an optical signal corresponding to the base station signal classified by the decoupler into an RF signal; A fourth optical signal converter converting an optical signal corresponding to the DMB signal classified by the decoupler into an RF signal; A repeater for transmitting the base station signal converted by the third optical signal converter to a terminal within coverage; And a transmitter for transmitting the DMB signal converted by the fourth optical signal converter to a terminal within coverage.
In accordance with another aspect of the present invention, there is provided a method of processing a digital multimedia broadcasting signal of a mobile communication system, the method comprising: receiving, by the base station, a DMB signal for providing a digital multimedia broadcasting (DMB) service; Converting, by the base station, the received DMB signal into a first optical signal; After converting a base station signal for providing a mobile communication service into a second optical signal, the first optical signal and the second optical signal are mixed to generate a multiple optical signal, and the generated multiple optical signal is Transmitting to the relay station; The relay station classifying the received multiple optical signal into the first optical signal and the second optical signal; And converting the first optical signal, which is the relay station, into the DMB signal, converting the second optical signal into the base station signal, and transmitting the second optical signal to the terminal included in the coverage.
In the method of processing a digital multimedia broadcasting signal of a relay station according to an embodiment of the present invention, in a signal processing method of a relay station connected to a base station through an optical cable in a mobile communication system, a multi-optical signal received from the base station through the optical cable is converted into an optical wavelength. Classifying the signal into an optical signal corresponding to a base station signal and a digital multimedia broadcasting (DMB) signal; Converting an optical signal corresponding to the classified base station signal and a DMB signal into respective RF signals; Transmitting an RF signal corresponding to the base station signal and the DMB signal to a terminal within coverage; Converting a base station signal received from a terminal included in the coverage into an optical signal; And transmitting the converted optical signal to the base station through the optical cable.

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Other objects and features of the present invention in addition to the above object will be apparent from the description of the embodiments with reference to the accompanying drawings.

Hereinafter, with reference to Figures 3 and 5 attached to a preferred embodiment of the present invention will be described in detail.

3 is a block diagram illustrating a mobile communication system according to a preferred embodiment of the present invention.

As shown in FIG. 3, the base station 100 and the optical relay station 200 are connected through an optical cable, and the mobile terminal 300 and the DMB terminal 400 are located within the coverage of the base station 100 and the optical relay station 200. ) Is connected wirelessly.

The mobile terminal 300 is a terminal receiving a mobile communication service by exchanging a base station signal through a base station 100 and an optical relay station 200, and the DMB terminal receives a DMB signal according to a terrestrial DMB method or a satellite DMB method. The terminal receives the DMB service.

The mobile terminal 300 and the DMB terminal 400 may provide different functions to the subscriber or provide the mobile communication service and the DMB service to the subscriber at the same time. That is, the DMB service function may be additionally implemented in the mobile terminal 300 to provide the DMB service while the mobile communication service is provided, or the mobile communication service function may be additionally implemented in the DMB terminal 400.

The base station 100 transmits a mobile communication signal received from a control station (not shown) to the mobile terminal 300 or the optical relay station 200, or a mobile communication signal received from the mobile terminal 300 or the optical relay station 200. Send to the control station.

The optical relay station 200 transmits the base station signal received from the base station 100 to the mobile terminal 300 included in the coverage, or transmits the base station signal received from the mobile terminal 300 to the control station through the base station 100. send. In addition, the optical relay station 200 transmits the received DMB signal to the DMB terminal 400 included in the coverage.

4 is a block diagram illustrating a DMB signal processing apparatus of a mobile communication system according to an embodiment of the present invention.

Referring to FIG. 4, the base station 100 and the optical relay station 200 are connected through an optical cable, and the base station 100 includes a base transceiver station (BTS) 110, a master 120, and a DMB master processing unit ( 130, and the DMB master processing unit 130 includes a coupler unit 131, an all-optical signal converter 132, and a DMB reception amplifier unit 133.

The optical relay station 200 includes a repeater 210, a slave 220, and a DMB slave processing unit 230. The DMB slave 230 includes a decoupler unit 231 and an optical / electric signal converter. 232 and a DMB sending section 233.

The DMB master processing unit 130 receives the DMB signal and amplifies it at a predetermined width ratio, and then converts the DMB signal of the RF signal method into an optical signal. The DMB master processing unit 130 mixes the DMB signal converted into the optical signal and the base station signal converted into the optical signal in the master 120 and transmits the mixed signal to the optical relay station 200 through the optical cable.

That is, the DMB reception amplifier 133 of the DMB master processor 130 receives the DMB signal and amplifies the received DMB signal according to a predetermined amplification rate.

There are two types of DMB system: terrestrial DMB and satellite DMB. Terrestrial DMB uses the frequency bands of 204 MHz to 210 MHz and 180 NHz to 186 MHz. Use the frequency band of.

Accordingly, the DMB reception amplifier 133 may include a reception module capable of receiving both terrestrial DMB signals and satellite DMB signals, or may include a reception module capable of receiving respective DMB signals, respectively. The DMB signals can be amplified at different amplification rates or at the same amplification rates.

The pre / optical signal converter 132 converts the DMB signal of the RF signal method amplified by the DMB reception amplifier 133 into an optical signal. That is, the all-optical signal converter 132 converts the DMB signal, which is an electrical signal, into an optical signal.

The coupler unit 131 mixes a base station signal converted into an optical signal by the master 120 and a DMB signal converted into an optical signal by the pre / optical signal converter 132 to coexist with the base station signal and the DMB signal together. Generates multiple optical signals, and transmits to the optical relay station 200 through the optical cable.

In this case, the coupler unit 131 may have a different optical wavelength or frequency band so that the base station signal converted into the optical signal by the master 120 and the DMB signal converted into the optical signal by the pre / optical signal converter 132 are not mixed. It is desirable to mix according to weights to produce multiple optical signals.

For example, the coupler unit 132 may generate a multiple optical signal by having a base station signal converted into an optical signal having a frequency band of 11 GHz and a DMB signal converted into an optical signal having a frequency band of 22 GHz.

In addition, the coupler unit 131 may mix the base station signal and the DMB signal converted into the optical signal according to a wavelength division multiplexing technique to generate one multiple optical signal.

The wavelength division multiplexing technique is a technique proposed to solve a terabit-class broadband transmission network, and is a technique of loading various kinds of signals from different places together on one optical cable, and improves communication capacity and speed. Each signal is transmitted at its own unique wavelength, which can carry up to 80 wavelengths or data channels on a single fiber.

That is, the coupler unit 131 sets the optical wavelength or frequency band of each optical signal differently to generate a WDM signal which is one multiple optical signal, and transmits the multiple optical signal to the optical relay station 200 through the optical cable. .

Meanwhile, the DMB slave processing unit 230 of the optical relay station 200 transmits the base station signal to the slave 220 after classifying the multiple optical signals received through the optical cable by different optical wavelengths or frequency bands, and the DMB signal is The DMB signal is converted into the DMB signal of the RF signal method and transmitted to the DMB terminal 400 included in the coverage.

The slave 220 converts the received optical signal into a base station signal of an RF signal type and transmits it to the repeater 210, and the repeater 210 transmits the base station signal to the mobile terminal 300 included in the coverage.

In addition, the repeater 210 transmits the base station signal received from the mobile terminal 300 included in the coverage to the slave 220, and the slave 220 converts the received base station signal into an optical signal to the DMB slave processor 230. To send).

The DMB slave processor 230 transmits the received optical signal to the base station 100 through the optical cable, so that the mobile terminal 300 included in the coverage of the optical relay station 200 can receive the mobile communication service. .

The decoupler unit 231 of the DMB slave processing unit 230 classifies a plurality of optical signals included in the multiple optical signals received through the optical cable by optical wavelength or frequency band.

According to an example, when the base station signal has a frequency band of 11 GHz and a DMB signal converted into an optical signal to have a frequency band of 22 GHz to generate a multiple optical signal, the decoupler unit 231 may have a frequency of 11 GHz. The optical signal received in the frequency band is transmitted to the slave 220, and the optical signal received in the 22 GHz frequency band is transmitted to the optical signal conversion unit 232.

The optical / electric signal converter 232 converts the optical signal received from the decoupler 231, that is, the DMB signal converted into the optical signal, into a DMB signal of an RF signal method. The optical / electrical signal converter 232 converts the optical signal into an electrical signal.

The DMB transmitter 233 transmits the DMB signal converted into the RF signal to the DMB terminal 400 included in the coverage.

5 is a flowchart illustrating a flow of a DMB signal processing method of a mobile communication system according to an exemplary embodiment of the present invention.

Referring to FIG. 5, the base station 100 amplifies a received terrestrial DMB signal or satellite DMB signal at a predetermined amplification rate (S100).

The base station 100 converts the received amplified RF signal type DMB signal into an optical signal (S110).

On the other hand, if the base station 100 includes the mobile terminal 300 to transmit the mobile communication signal received from the control station (not shown) within the coverage of the optical relay station 200, the base station signal corresponding to the mobile communication signal is an optical signal Convert to (S 120).

In addition, the base station 100 generates a multiple optical signal by mixing the DMB signal converted into an optical signal and the base station signal. Then, the base station 100 transmits the generated multiple optical signal to the optical relay station 200 through the optical cable (S 130).

According to an example, the DMB reception amplifier 133 of the base station 100 amplifies the received DMB signal according to a predetermined predetermined amplification ratio and transmits it to the pre / optical signal converter 132. The pre / optical signal converting unit 132 converts the received DMB signal into an optical signal and transmits it to the coupler unit 131.

If the mobile terminal 300 to transmit the mobile communication signal received from the control station is included in the coverage of the optical relay station 200, the BTS 110 transmits the mobile communication signal to the master 120 and the master 120. ) Converts a base station signal corresponding to the received mobile communication signal into an optical signal.

The coupler unit 131 mixes the optical signal converted by the master 120 and the optical signal converted by the pre / optical signal converter 132 according to the wavelength division multiplexing technique to generate a multiple optical signal. The coupler unit 131 transmits the multiple optical signals to the optical relay station 200 through the optical cable.

In this case, the coupler unit 131 may have a different optical wavelength or frequency band so that the base station signal converted into the optical signal by the master 120 and the DMB signal converted into the optical signal by the pre / optical signal converter 132 are not mixed. It is preferable to generate a multi-optical signal by mixing according to the weight. According to an example, the coupler unit 132 may convert the base station signal into an optical signal in a frequency band of 11 GHz and a DMB signal converted into an optical signal in a 22 GHz frequency band. By generating a multi-optic signal can be generated.

On the other hand, the optical relay station 200 classifies the multiple optical signals received through the optical cable by optical wavelength or frequency band, and distinguishes the base station signal and the DMB signal (S 140).

The optical relay station 200 converts the divided base station signal into an RF signal and transmits it to the mobile terminal 300 included in the coverage (S 150), and converts the DMB signal into an RF signal, which is an electrical signal, to the DMB terminal 400. Send (S 160).

According to an example, the decoupler unit 231 of the DMB slave processing unit 230 classifies the plurality of optical signals included in the multiple optical signals received through the optical cable by optical wavelength or frequency band.

According to an example, the decoupler unit 231 of the optical relay station 200 transmits the optical signal received in the 11 GHz frequency band to the slave 220, and the optical signal received in the 22 GHz frequency band converts the optical / electric signal. Transfer to section 232.

The optical / electric signal converter 232 converts the optical signal received from the decoupler 231, that is, the DMB signal converted into the optical signal, into a DMB signal of an RF signal method, and transmits the DMB signal to the DMB transmitter 233. do.

The DMB transmitter 233 transmits the DMB signal converted into the RF signal to the DMB terminal 400 included in the coverage.

Meanwhile, the decoupler unit 231 transmits the base station signal to the slave 220, and the slave 220 converts the base station signal into an RF signal and transmits the signal to the repeater 210.

The repeater 210 transmits the received base station signal to the mobile terminal 300 included in the coverage.

As described above, the method and apparatus for processing digital multimedia broadcasting signals of a mobile communication system according to the present invention can relay DMB signals through a base station and an optical relay station established in an existing mobile communication system. There is an economic effect of not having to rent a separate building or optical cable to provide.

Those skilled in the art will appreciate that various changes and modifications can be made without departing from the technical spirit of the present invention. Therefore, the technical scope of the present invention should not be limited to the contents described in the detailed description of the specification but should be defined by the claims.

Claims (21)

A reception amplifier for amplifying a digital multimedia broadcasting (DMB) signal according to a predetermined predetermined amplification rate, a first signal converter for converting the DMB signal amplified by the reception amplifier into a first optical signal, and providing a mobile communication service A second signal converter for converting a base station signal into a second optical signal, and a plurality of signals generated by mixing a plurality of optical signals converted by each of the first signal converter and the second signal converter A base station including a coupler unit for transmitting an optical signal; A decoupler unit for classifying the multiple optical signals received from the coupler unit of the base station into a plurality of optical signals according to an optical wavelength, and a third unit converting the third optical signal classified by the decoupler unit into a base station signal which is an RF signal A signal converter, a fourth signal converter for converting the fourth optical signal classified by the decoupler into a DMB signal as an RF signal, and a repeater for transmitting the base station signal converted by the third signal converter to a terminal within coverage A relay station including a transmitter for transmitting the DMB signal converted by the fourth signal converter to a terminal within coverage; And And an optical cable connected to the coupler portion of the base station and the decoupler portion of the relay station to transmit the multiple optical signals to the decoupler portion. delete The method of claim 1, The coupler unit, And generating the multiple optical signals according to the respective optical signals according to a wavelength division multiplexing technique. The method of claim 1, The coupler unit, And generating the multiple optical signals by differently setting optical wavelengths of the optical signals. The method of claim 1, Each signal converter, A mobile communication system for converting an electrical signal of an RF (Radio Frequence) signal system into an optical signal. delete A base station of a mobile communication system connected to a relay station through an optical cable, A reception amplifying unit configured to receive a DMB signal for providing a DMB (Digital Multimedia Broadcasting) service and amplify it at a predetermined predetermined amplification rate; A first optical signal converter converting the DMB signal amplified by the reception amplifier into an optical signal; A second optical signal conversion unit converting a base station signal for providing a mobile communication service into an optical signal; And After generating the multiple optical signal by the wavelength division multiplexing technique of the plurality of optical signals converted by the first optical signal converter and the second optical signal converter to transmit to the relay station through the optical cable A base station of a mobile communication system comprising a coupler unit. The method of claim 7, wherein If the terminal to transmit the base station signal is included in the coverage, the base transceiver station for transmitting the base station signal to the terminal, and provides a mobile communication service to the terminal according to the signal received from the terminal included in the coverage (Base And a base station of the mobile communication system. The method of claim 8, The base transceiver station, And transmitting the base station signal to the second optical signal converting unit if the terminal for transmitting the base station signal is included in the coverage of the relay station. In a relay station of a mobile communication system connected to a base station via an optical cable, A decoupler unit for classifying a multiple optical signal received from the base station through the optical cable into an optical signal corresponding to a base station signal and a digital multimedia broadcasting (DMB) signal according to an optical wavelength; A third optical signal converter converting an optical signal corresponding to the base station signal classified by the decoupler into an RF signal; A fourth optical signal converter converting an optical signal corresponding to the DMB signal classified by the decoupler into an RF signal; A repeater for transmitting the base station signal converted by the third optical signal converter to a terminal within coverage; And And a transmitter for transmitting the DMB signal converted by the fourth optical signal converter to a terminal within coverage. The method of claim 10, The repeater, And a base station signal received from the terminal included in the coverage to the third optical signal converter. The method of claim 11, The third optical signal converter, And converting the base station signal received from the repeater into an optical signal and transmitting the optical signal to the base station. In the signal processing method of a mobile communication system comprising a base station and a relay station, Receiving, by the base station, a DMB signal for providing a digital multimedia broadcasting (DMB) service; Converting, by the base station, the received DMB signal into a first optical signal; After converting a base station signal for providing a mobile communication service into a second optical signal, the first optical signal and the second optical signal are mixed to generate a multiple optical signal, and the generated multiple optical signal is Transmitting to the relay station; The relay station classifying the received multiple optical signal into the first optical signal and the second optical signal; And And converting the first optical signal, which is the relay station, into the DMB signal, and converting the second optical signal into the base station signal and transmitting the converted optical signal to a terminal included in the coverage. Broadcast signal processing method. The method of claim 13, The multiple optical signal generation, A digital multimedia broadcasting signal processing method of a mobile communication system, characterized by generating according to a wavelength division multiplexing technique. The method of claim 13, The multiple optical signal generation, And generating and mixing the optical wavelengths of the optical signals differently from each other. The method of claim 13, The classification of the multiple optical signal, And classifying according to the optical wavelength of each optical signal included in the multiple optical signals received from the base station. The method of claim 13, And amplifying the received DMB signal according to a predetermined predetermined amplification rate. The method of claim 13, The conversion of the signal, And converting the RF signal into an optical signal or converting the optical signal into an RF signal. delete In the signal processing method of a relay station connected to a base station through an optical cable in a mobile communication system, Classifying the multiple optical signals received from the base station through the optical cable into optical signals corresponding to base station signals and digital multimedia broadcasting (DMB) signals according to optical wavelengths; Converting an optical signal corresponding to the classified base station signal and a DMB signal into respective RF signals; Transmitting an RF signal corresponding to the base station signal and the DMB signal to a terminal within coverage; Converting a base station signal received from a terminal included in the coverage into an optical signal; And And transmitting the converted optical signal to the base station through the optical cable. delete

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