KR20120081274A - Transmitter and receiver of fiber optical transmission system and method for mapping data thereof - Google Patents

Abstract

The present invention relates to a transmitter, a receiver, and a data mapping method for an optical relay, and simultaneously transmits a plurality of communication signals generated from different networks. Through this, it is possible to reduce the investment cost by transmitting mobile communication and wired communication to the destination in an efficient way, so it is possible to transmit signals for multiple network methods using one SFP, and data using digital signal processing of optical repeater Data can be converted by applying compression algorithms without modification of the digital signal processing without adding optical wavelength or changing the optical frame, so it can be applied to existing digital optical repeaters to secure stable signals without problems of device resources and signal delay. can do.

Description

Transmitter and receiver of fiber optical transmission system and method for mapping data according to optical relay

The present invention relates to a transmitter, a receiver, and a data mapping method for an optical relay, and more particularly, to a transmitter, a receiver, and an optical relay for simultaneously transmitting a plurality of communication signals generated from different networks. It relates to a data mapping method.

With the development of mobile communication and the development of terminal specifications, mobile communication terminals have become a necessity belonging to modern people beyond the scope of simple communication devices or information providing devices, and are evolving into total entertainment devices.

In general, a mobile communication network transmits a signal from a base station to a terminal and uses a repeater to solve the shadow area. One of these repeaters, the digital optical repeater, includes a main hub unit (MHU) that receives signals from a base station and a remote optical unit (ROU) that performs a relay function at a lower stage. It performs communication service to transmit data to the shadow area.

In particular, the digital optical repeater according to the currently operating mobile communication service uses a digital frame to map a code division multiple access (CDMA) signal and a wide code division multiple access (WCDMA) signal to a 3Gbs optical line. . Here, the optical repeater samples the CDMA signal and the WCDMA signal at 14 bits of 100 MHz, converts them into 187.5 MHz 16 bits, and transmits them to map the digital frame.

However, in order to simultaneously transmit CDMA signals, WCDMA signals, and 1Gbps Ethernet signals using 3Gbps optical lines, the cost of the small form factor pluggable (SFP) should be increased to 4.5Gbps, which is a price increase factor. .

In order to solve such a conventional problem, an object of the present invention is to provide a transmitter, a receiver and a data mapping method for optical relay that can simultaneously transmit communication signals generated in different networks without changing the SFP.

In addition, an object of the present invention is to convert the downsampled by converting an analog signal corresponding to a signal for a wireless network and a signal for a wired network to a digital signal, to sequentially transmit the downsampled signal, and to receive the mapped signal To separate the mapped signals, upsample the separated signals according to data rates, and convert the upsampled digital signals into analog signals, and a transmitter, a receiver, and a data mapping method thereof for an optical relay. I would like to.

In accordance with an aspect of the present invention, a transmission apparatus for an optical relay includes a plurality of analog to digital converters (ADCs) for converting a signal for at least one or more wireless network schemes into digital signals, And a plurality of sampling rate converters (SRCs) for downsampling digital signals and signals according to a wired network, and signal mapping units for sequentially mapping the downsampled signals to optical signals.

In addition, in the transmitting apparatus for optical relay according to the present invention, the SRC is characterized in that the sampling of the digital signal for the at least one wireless network system and the signal for the wired network system, and mapping the sampled signal sequentially .

In addition, in the transmitter for the optical relay according to the present invention, the SRC is characterized in that the digital conversion of the signal for the wireless network method and the wired network method to a predetermined frequency and bit rate, respectively.

In the transmission apparatus for optical relay according to the present invention, the signal mapping unit downsamples a signal for each network system at a predetermined frequency and a bit rate while maintaining a predetermined data rate.

In addition, in the transmitting apparatus for optical relay according to the present invention, the signal mapping unit is characterized in that to sequentially map the signal for each network system.

In addition, in the transmitter for optical relay according to the present invention, the signal mapping unit is characterized in that for transmitting a signal for each network method at a constant light speed.

The receiving apparatus for optical relay according to an exemplary embodiment of the present invention includes a signal demapping unit for sequentially separating and demapping optical signals into signals corresponding to a plurality of network schemes, and data of the demapped signals according to respective network schemes. And a plurality of ADCs for reconstructing a signal for a wireless network scheme among the plurality of SRCs and upsampled signals while maintaining the rate.

In addition, in the receiving apparatus for optical relay according to the present invention, the signal demapping unit receives an optical signal, sequentially demaps the signals for a plurality of network schemes, and samples the demapped signals.

In addition, the receiving device for optical relay according to the present invention, the de-mapping unit is characterized in that for sequentially demapping the signals for a plurality of network systems.

In addition, in the receiver for optical relay according to the present invention, the SRC is characterized in that upsampling signals for a plurality of network schemes at a predetermined frequency and bit rate while maintaining a predetermined data rate.

In the cloud computing system according to an embodiment of the present invention, a plurality of ADCs for converting a signal for at least one or more wireless network schemes into a digital signal, a plurality of SRCs for downsampling signals according to a digital signal and a wired network scheme; A transmission device including a signal mapping unit for sequentially mapping down-sampled signals into optical signals, a signal demapping unit for sequentially separating and demapping optical signals into signals corresponding to a plurality of network methods, and demapping signals Including a receiving device consisting of a plurality of SRC upsampled while maintaining the data rate according to each network method and a plurality of ADCs to recover the signal for the wireless network method of the upsampled signal to transmit data as an optical signal It is characterized by.

According to an embodiment of the present invention, a data mapping method for optical relay includes sampling each signal corresponding to a plurality of network schemes, sequentially mapping a plurality of sampled signals, and converting the mapped signals into optical signals. Characterized in that it comprises the step of transmitting.

In addition, the data mapping method for optical relay according to the present invention, before the step of sampling, further comprising the step of converting a signal corresponding to a wireless network method of the signal corresponding to a plurality of network methods to a digital signal It features.

In the data mapping method for optical relaying according to the present invention, the sampling may include downsampling a signal for at least one wireless network method and a signal for a wired network method.

According to an embodiment of the present invention, a data mapping method for optical relaying includes receiving an optical signal, separating a signal sequentially mapped a plurality of signals corresponding to a plurality of network schemes from the optical signal, and separating the plurality of separated signals. Sampling each of the signals while maintaining the data rate according to the network scheme.

In addition, the data mapping method for optical relay according to the present invention, after the step of sampling, characterized in that it further comprises the step of converting the signal for the wireless network method of the sampled signal to a digital signal to restore.

In the data mapping method for optical relaying according to the present invention, the sampling may include upsampling a signal for each network scheme.

In addition, in the data mapping method for optical relay according to the present invention, a plurality of signals corresponding to a plurality of network schemes of the wireless network scheme including one or more of CDMA, WCDMA, GSM, GPRS, HSDPA, HSUPA and LTE The signal is characterized in that the signal of the wireless network method including one of a cable modem, Ethernet and DSL.

According to the present invention, it is possible to transmit a signal for a plurality of network methods using a single SFP while reducing the investment cost by transmitting signals according to a mobile communication method and a wired communication method to an destination in an efficient manner, You can make the most of your services.

In addition, by applying the data compression algorithm using the digital signal processing of the optical repeater, data can be converted into the digital signal repeater without modification of the digital signal processing without adding wavelength or changing the optical frame. In addition, because it is a simple digital signal processing, it is possible to obtain a stable signal without problems of device resources and signal delay.

In addition, the optical repeater enables the installation of a base station that can be remotely connected because the idle capital is reduced, the network can be efficiently configured with the lowest cost, the maintenance cost is reduced, and the flexibility of the base station site selection is improved.

In addition, it is possible to optimize the system by redistributing channels according to call volume, thus maximizing customer satisfaction through the best call quality.

In addition, due to the diversification of the transmission and reception contacts, it is possible to eliminate the large building shadow area.

1 is a block diagram showing an optical relay system according to an embodiment of the present invention.
2 is a block diagram illustrating a detailed configuration of a donor unit and a remote unit according to an exemplary embodiment of the present invention.
3 is a block diagram illustrating a configuration of a mapping apparatus according to an embodiment of the present invention.
4 is a flowchart illustrating a process of receiving data in a data mapping method of an optical relay system according to an exemplary embodiment of the present invention.
5 is a flowchart illustrating a process of transmitting data in a data mapping method of an optical relay system according to an exemplary embodiment of the present invention.
6 and 7 are exemplary diagrams for describing a data mapping method of an optical relay system according to an exemplary embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description and the accompanying drawings, detailed description of well-known functions or constructions that may obscure the subject matter of the present invention will be omitted. In addition, it should be noted that like elements are denoted by the same reference numerals as much as possible throughout the drawings.

The terms or words used in the specification and claims described below should not be construed as being limited to ordinary or dictionary meanings, and the inventors are appropriate as concepts of terms for explaining their own invention in the best way. It should be interpreted as meanings and concepts in accordance with the technical spirit of the present invention based on the principle that it can be defined. Therefore, the embodiments described in the present specification and the configurations shown in the drawings are merely the most preferred embodiments of the present invention, and not all of the technical ideas of the present invention are described. Therefore, It is to be understood that equivalents and modifications are possible. Hereinafter, a terminal according to an embodiment of the present invention will be described as a representative example of a mobile communication terminal connected to a communication network capable of transmitting and receiving data through an optical repeater, but the terminal is not limited to the mobile communication terminal, all information communication devices, multimedia It can be applied to various terminals such as a terminal, a wired terminal, a fixed terminal, and an Internet Protocol (IP) terminal. In addition, the terminal may be advantageously used when the mobile terminal having various mobile communication specifications such as a mobile phone, a portable multimedia player (PMP), a mobile internet device (MID), a smart phone, and an information communication device. have.

The wireless network method according to the embodiment of the present invention is CDMA, WCDMA, Global System for Mobile communication (GSM), General Packet Radio Service (GPRS), High Speed downlink Packet Access (HSDPA), High Speed Uplink Packet Access (HSUPA), And an access scheme such as Long Term Evolution (LTE). In addition, the wired network method according to an embodiment of the present invention may include a connection method such as a cable modem (Modem), Ethernet and Digital Subscriber Line (DSL).

Meanwhile, in the exemplary embodiment of the present invention, CDMA, WCDMA, and LTE will be described as typical access methods of a wireless network method, and Ethernet will be described as a typical access method of a wired network method. However, the wireless network method and the wired network method are not limited to the connection method described, and the access method according to the various network methods described above may be applied.

1 is a block diagram showing an optical relay system according to an embodiment of the present invention.

Referring to Figure 1, Optical relay system 100 according to an embodiment of the present invention is composed of an optical repeater 10, optical cable 40 and the base station 50. In this case, the optical repeater 10 may include a remote unit 30, and the base station 50 may include a donor unit 20.

The optical relay system 100 converts a radio frequency (RF) signal and a signal for a wired network method for a wireless network method received from the base station 50 into an optical signal and transmits the signal to the remote unit 30. Remote unit for converting and amplifying the optical signal received from the base station 50 and the donor unit 20 including a wireless network method and a signal for a wired network method to provide a communication service for the user ( The optical repeater 10 includes 30). At this time, the donor part 20 and the remote part 30 are connected via an optical cable. That is, the optical relay system 100 is composed of a donor unit 20 connected to the base station 50 and a repeater located in the center of the service area (shading area) to be expanded, and down-link ) And up-link operation. At this time, the optical relay system 100 receives the high frequency signal transmitted from the base station 50 in the forward operation to prevent the loop back phenomenon of the input / output due to the spill-over from the donor unit 20. The signal is converted into a signal and transmitted to the remote unit 30 to cover the shadow area. Then, the remote unit 30 converts the received optical signal into a signal for the original wireless network method transmitted by the base station and a signal for the wired network method and provides it to the subscriber.

The donor unit 20 and the remote unit 30 executing the function according to the present invention will be described in detail.

The donor unit 20 may convert an analog signal corresponding to a signal for a plurality of wireless network methods into an analog-to-digital converter (ADC) and convert it into a digital signal. Here, the donor part 20 adjusts the bit rate of the signal for the wireless network. In addition, the donor unit 20 downsamples the signal whose bit rate is converted. At this time, the donor unit 20 downsamples while maintaining the data rate of the optical signal.

The donor unit 20 sequentially maps downsampled signals. Thereafter, the donor unit 20 may transmit a signal for a wireless network and a signal for a wired network as a 3Gbps optical signal.

The remote unit 30 receives the optical signal from the donor unit 20. Here, the remote unit 30 deframes the received optical signal to separate the original signal, that is, signals for a plurality of wireless networks and Ethernet signals. In this case, the remote unit 30 may sequentially demap the CDMA signal, the WCDMA signal, the LTE signal, and the 1 Gbps Ethernet signal.

The remote unit 30 samples the separated signals by maintaining the data rate. The remote unit 30 then converts the signal for the wireless network from the upsampled digital signal into an analog signal.

In addition, the remote unit 30 converts a signal for a wireless network received from at least one terminal into a digital signal. The remote unit 30 adjusts bit rates of the converted digital signal and the Ethernet signal.

The remote unit 30 downsamples the signal of which the bit rate is converted, and sequentially maps the downsampled signal. Here, the remote unit 30 may downsample while maintaining the data rate. The remote unit 30 sequentially generates signals of 3 Gbps by mapping signals for a wireless network and signals for a wired network. Thereafter, the remote unit 30 optically transmits the mapped signal to the donor unit 20.

The donor unit 20 receives an optical signal from the remote unit 30. Here, the donor 20 deframes the optical signal to separate the signal and the Ethernet signal for the sequentially mapped wireless network method.

The donor unit 20 upsamples the separated signals at a data rate. At this time, the donor 20 upsamples the separated signals while maintaining the respective data rates. Then, the donor unit 20 may convert a signal for a wireless network type into an analog signal among the upsampled digital signals.

Through this, it is possible to reduce the investment cost by transmitting mobile communication and wired communication to the destination in an efficient way, and to transmit signals for multiple networks using one SFP, and to provide services by utilizing the existing infrastructure to the maximum. Can be. In addition, by applying a data compression algorithm using the digital signal processing of the optical repeater, data can be converted into the digital signal repeater without modification of the digital signal processing without adding wavelength or changing the optical frame. Because of the simple digital signal processing, a stable signal can be obtained without problems of device resources and signal delay. In addition, since the optical repeater reduces idle capital, enables efficient network configuration of minimum cost, maintenance cost reduction, and flexibility in selecting a base station site, it is possible to install a base station that can be remotely connected. In addition, it is possible to optimize the system by redistributing channels according to the call volume, thus maximizing customer satisfaction by maintaining the best call quality. In addition, due to the diversification of the transmission and reception contacts, it is possible to eliminate the large building shadow area.

In addition, the data optical relay system 100 according to the present invention is applicable to the field of cloud computing. In general, cloud computing refers to information technology (IT) resources, such as hardware (servers, storage, networks, etc.), software (databases, security, web servers, etc.), services, data, etc., which are virtualized using Internet technologies. It refers to a technology that serves on demand. According to an embodiment of the present invention, a cloud computing system applied to a data transmission technology may optically transmit data to a terminal through a mapping device. That is, in the cloud computing system, data at the request of the terminal is optically transmitted through the mapping device. In this case, the mapping apparatus converts signals for a plurality of network schemes into digital signals, downsamples each data of the converted signals, and sequentially maps the downsampled signals. Thereafter, the mapping apparatus optically transmits the mapped signal to the terminal.

In addition, the cloud computing system may receive data from the terminal at an optical speed through the mapping device. That is, the mapping apparatus deframes the optical signal received from the terminal, and then sequentially separates the mapped signals, and upsamples the separated signals by maintaining the data rates. The mapping apparatus may then convert the upsampled digital signal into an analog signal and restore the signal for a plurality of network schemes.

2 is a block diagram illustrating a detailed configuration of a donor unit and a remote unit according to an exemplary embodiment of the present invention.

Referring to FIG. 2, the donor part 20 including the first transmitter 21 and the first receiver 22, the second transmitter 31, and the second receiver 32 according to an exemplary embodiment of the present invention are configured. Consisting of a remote unit 30. Hereinafter, a case in which the CDMA signal and the WCDMA signal are transmitted together with the Ethernet signal or the LTE signal and the WCDMA signal are transmitted together with the Ethernet signal when the speed of the optical line is 3 Gbps will be described as an example.

The donor unit 20 needs to reduce the sampling rate as much as possible in order to reduce the existing data rate. Here, the donor portion 20 actually has a data rate of 2.8 Gbps in a 3 Gbps digital frame. Therefore, the donor part 20 digitally converts into 75 bits 12 bits. For example, if the signal according to the wireless network method is a CDMA signal and the WCDMA signal, and the signal according to the wired network method is an Ethernet signal, the converted signal will be CDMA 75 MHz 12 bits, WCDMA 75 MHz 12 bits, 1 Gbps Ethernet 125 MHz 8 bits. Can be. In addition, when the signal according to the wireless network method is an LTE signal and the WCDMA signal, and the signal according to the wired network method is an Ethernet signal, the converted signal may be LTE 75 MHz 12 bits, WCDMA 75 MHz 12 bits, 1 Gbps Ethernet 125 MHz 8 bits. . In other words, the total data rate is 2.8 Gbps.

The first transmitter 21 of the donor unit 20 converts signals for a plurality of wireless network systems into digital signals. Here, the first transmitter 21 may convert the ADC input analog signal into a digital signal. The donor 20 adjusts the bit rate of the converted digital signal and the Ethernet signal. For example, when a signal based on a wireless network method is a CDMA signal and a WCDMA signal, and a signal based on a wired network method is an Ethernet signal, the first transmitter 21 transmits the CDMA signal to 75 MHz 12 bits and the WCDMA signal to 75 MHz 12 bits. To digital conversion. Further, when the signal according to the wireless network method is an LTE signal and the WCDMA signal, and the signal according to the wired network method is an Ethernet signal, the first transmitter 21 transmits the LTE signal to 75 MHz 12 bits and the WCDMA signal to 75 MHz 12 bits digital. To convert.

The first transmitter 21 downsamples the converted signal. For example, the first transmitter 21 may downsample the CDMA signal to 25 MHz 36 bits, the WCDMA signal to 25 MHz 36 bits, and the 1 Gbps Ethernet signal to 25 MHz 40 bits while maintaining a data rate of 2.8 Gbps. In addition, the first transmitter 21 may downsample the LTE signal to 25 MHz 36 bits, the WCDMA signal to 25 MHz 36 bits, and the 1 Gbps Ethernet signal to 25 MHz 40 bits while maintaining a data rate of 2.8 Gbps.

The first transmitter 21 sequentially maps the downsampled signal. For example, when a signal based on a wireless network method is a CDMA signal and a WCDMA signal, and a signal based on a wired network method is an Ethernet signal, the first transmitter 21 sequentially maps the CDMA signal, WCDMA signal, and 1 Gbps Ethernet signal. do. In addition, when the signal according to the wireless network system is an LTE signal and the WCDMA signal, and the signal according to the wired network system is an Ethernet signal, the first transmitter 21 sequentially maps the LTE signal, WCDMA signal and 1 Gbps Ethernet signal. Thereafter, the first transmitter 21 may transmit the CDMA signal, the WCDMA signal, the LTE signal, and the 1 Gbps Ethernet signal to the second receiver 32 of the remote unit 30 at a 3 Gbps optical speed.

The second receiver 32 receives an optical signal from the first transmitter 21 of the donor 20. Here, the second receiver 32 deframes the optical signal to sequentially separate the signal for the original wireless network and the Ethernet signal. In this case, the second receiver 32 sequentially demaps the CDMA signal, the WCDMA signal, and the 1 Gbps Ethernet signal when the signal according to the wireless network method is the CDMA signal and the WCDMA signal, and the signal according to the wired network method is the Ethernet signal. can do. Further, when the signal according to the wireless network method is an LTE signal and the WCDMA signal, and the signal according to the wired network method is an Ethernet signal, it is possible to sequentially demap the LTE signal, WCDMA signal and 1 Gbps Ethernet signal.

The second receiver 32 upsamples the separated signals at a data rate. For example, the second receiver 32 upsamples the CDMA signal to 75Mhz 12 bits, the WCDMA signal to 75Mhz 12bits, and the 1Gbps Ethernet signal to 125Mhz 8bits. In addition, the second receiver 32 upsamples the LTE signal to 75 MHz 12 bits, the WCDMA signal to 75 MHz 12 bits, and the 1 Gbps Ethernet signal to 125 MHz 8 bits. Thereafter, the second receiver 32 may convert a signal for a wireless network type into an analog signal among the upsampled digital signals.

In addition, the second transmitter 31 according to the embodiment of the present invention converts a signal for a wireless network method received from at least one terminal into a digital signal. For example, the second transmitter 31 digitally converts the CDMA signal into 75 MHz 12 bits, the WCDMA 75 MHz 12 bits, and the 1 Gbps Ethernet signal into 125 MHz 8 bits. In addition, the second transmitter 31 may digitally convert an LTE signal into 75Mhz 12 bits, a WCDMA 75Mhz 12bit, and a 1Gbps Ethernet signal into 125Mhz 8bit.

The second transmitter 31 downsamples the converted signal and sequentially maps the downsampled signal. For example, the second transmitter 31 downsamples a CDMA signal to 25 MHz 36 bits, a WCDMA signal to 25 MHz 36 bits, and a 1 Gbps Ethernet signal to 25 MHz 40 bits while maintaining a data rate of 2.8 Gbps. In addition, the second transmitter 31 may downsample the LTE signal to 25 MHz 36 bits, the WCDMA signal to 25 MHz 36 bits, and the 1 Gbps Ethernet signal to 25 MHz 40 bits while maintaining a data rate of 2.8 Gbps. The second transmitter 31 sequentially maps the CDMA signal, the WCDMA signal, the LTE signal, and the 1 Gbps Ethernet signal. Thereafter, the second transmitter 31 optically transmits the mapped signal to the first receiver 22 of the donor unit 20.

The first receiver 22 receives the optical signal from the second transmitter 31 of the remote unit 30. Here, the first receiver 22 deframes the optical signal to sequentially separate the signal for the original wireless network and the Ethernet signal. For example, when the signal according to the wireless network method is a CDMA signal and a WCDMA signal, and the signal according to the wired network method is an Ethernet signal, the first receiver 22 sequentially processes the CDMA signal, WCDMA signal, and 1 Gbps Ethernet signal. Can be de-mapped. Further, when the signal according to the wireless network method is an LTE signal and the WCDMA signal, and the signal according to the wired network method is an Ethernet signal, it is possible to sequentially demap the LTE signal, WCDMA signal and 1 Gbps Ethernet signal.

The first receiver 22 upsamples the separated signals at a data rate. For example, the first receiver 22 upsamples the separated signal to the CDMA signal 75Mhz 12 bits, the WCDMA signal to 75Mhz 12 bits, and the 1Gbps Ethernet signal to 125Mhz 8 bits while maintaining the respective data rates. In addition, the first receiver 22 upsamples the separated signal to the LTE signal 75 MHz 12 bits, the WCDMA signal to 75 MHz 12 bits, and the 1 Gbps Ethernet signal to 125 MHz 8 bits while maintaining the respective data rates. Then, the first receiver 22 may convert a signal for a wireless network method into an analog signal among the upsampled digital signals.

3 is a block diagram illustrating a configuration of a mapping apparatus according to an embodiment of the present invention.

Referring to FIG. 3, the mapping apparatus 60 according to an exemplary embodiment of the present invention includes a signal mapping unit 71, an ADC 72a and 72b, and a transmitter 70 and signal demapping which are configured of the SRCs 73a to 73c. It consists of a receiving unit 80 composed of a unit 81, ADCs 82a and 82b, and SRCs 83a to 83c.

 The transmitter 70 converts a signal for a wireless network method of the base station 50 into a digital signal. Here, the transmitter 70 may convert the analog signals input from the ADCs 72a and 72b into digital signals. For example, when a signal based on a wireless network method is a CDMA signal and a WCDMA signal, and a signal based on a wired network method is an Ethernet signal, the receiver 80 digitally converts a CDMA signal into 75 MHz 12 bits and a WCDMA signal into 75 MHz 12 bits. do. In addition, when the signal according to the wireless network method is an LTE signal and the WCDMA signal, and the signal according to the wired network method is an Ethernet signal, the receiver 80 may digitally convert the LTE signal into 75Mhz 12-bit, WCDMA signal into 75Mhz 12-bit have.

The transmitter 70 downsamples the converted signal. For example, the transmitter 70 downsamples a CDMA signal to 25 MHz 36 bits, a WCDMA signal to 25 MHz 36 bits, and a 1 Gbps Ethernet signal to 25 MHz 40 bits while maintaining a data rate of 2.8 Gbps. In addition, the transmitter 70 downsamples the LTE signal to 25 MHz 36 bits, the WCDMA signal to 25 MHz 36 bits, and the 1 Gbps Ethernet signal to 25 MHz 40 bits while maintaining a data rate of 2.8 Gbps. That is, the transmitter 70 may downsample the data in the sample rate converter (SRC) 73a to 73c (SRC) blocks to convert the CDMA signal and the WCDMA signal into 25 MHz 36 bits and the 1 Gbps Ethernet signal into 25 MHz 40 bits. In addition, the transmitter 70 may down-sample data from the SRCs 73a to 73c to convert the LTE signal and the WCDMA signal into 25 MHz 36 bits and the 1 Gbps Ethernet signal into 25 MHz 40 bits.

The transmitter 70 sequentially maps downsampled signals. For example, the transmitter 70 sequentially maps the CDMA signal, the WCDMA signal, the LTE signal, and the 1 Gbps Ethernet signal through the signal mapping unit 71. Then, the signal mapping unit 71 may transmit a CDMA signal, a WCDMA signal, an LTE signal, and a 1 Gbps Ethernet signal at a 3 Gbps optical speed.

The receiver 80 receives an optical signal from the transmitter 70. Here, the receiver 80 deframes the mapped signal to separate the signal for the original wireless network and the Ethernet signal. For example, the receiver 80 may sequentially demap the CDMA signal, the WCDMA signal, the LTE signal, and the 1 Gbps Ethernet signal through the signal demapping unit 81.

The receiver 80 upsamples the separated signals by maintaining the data rates. For example, the receiver 80 upsamples the separated signals to 75Mhz 12 bits, WCDMA to 75Mhz 12 bits, and 1Gbps Ethernet signals to 125Mhz 8 bits by maintaining respective data rates. In addition, the receiver 80 may upsample the separated signals to 75Mhz 12 bits, WCDMA to 75Mhz 12 bits, and 1Gbps Ethernet signals to 125Mhz 8 bits by maintaining respective data rates. That is, the receiver 80 upsamples the data in the SRCs 83a to 83c, respectively, and converts the CDMA signal and the WCDMA signal into 75 MHz 12 bits and the 1 Gbps signal into 125 MHz 8 bits. In addition, the receiver 80 may up-sample data from the SRCs 83a to 83c to convert the LTE signal and the WCDMA signal into 75 MHz 12 bits and the 1 Gbps signal into 125 MHz 8 bits. Then, the receiver 80 converts the digital signal corresponding to the signal for the wireless network method upsampled by the ADCs 82a and 82b into an analog signal.

Through this, it is possible to reduce the investment cost by transmitting mobile communication and wired communication to the destination in an efficient way, and it is possible to transmit signals for multiple network methods using one SFP, and to provide services by utilizing the existing infrastructure to the maximum. can do. In addition, by applying a data compression algorithm using the digital signal processing of the optical repeater, data can be converted into the digital signal repeater without modification of the digital signal processing without adding wavelength or changing the optical frame. Because of the simple digital signal processing, a stable signal can be obtained without problems of device resources and signal delay. In addition, since the optical repeater reduces idle capital, enables efficient network configuration with minimum cost, maintenance cost reduction, and flexibility of base station site selection, centralized base station installation capable of remote connection is possible. In addition, it is possible to optimize the system by redistributing channels according to the call volume, so that the highest quality can be maintained, maximizing customer satisfaction. In addition, due to the diversification of the transmission and reception contacts, it is possible to eliminate the large building shadow area.

4 is a flowchart illustrating a data receiving process in a data mapping method of an optical relay system according to an exemplary embodiment of the present invention.

Referring to FIG. 4, in the data mapping method of the optical relay system 100 according to an exemplary embodiment of the present invention, the optical repeater 10 converts signals for a wireless network method of a plurality of base stations 50 in step S11 into digital signals. To convert. Here, the optical repeater 10 may convert the ADC input analog signal into a digital signal. For example, when the signal according to the wireless network method is a CDMA signal and the WCDMA signal, and the signal according to the wired network method is an Ethernet signal, the optical repeater 10 is a 75Mhz 12-bit CDMA signal, 75Mhz 12-bit, WCDMA signal, Digitally converts 1Gbps Ethernet signals to 125Mhz 8-bit In addition, when the signal according to the wireless network method is an LTE signal and the WCDMA signal, and the signal according to the wired network method is an Ethernet signal, the optical repeater 10 is a 75Mhz 12-bit LTE signal, WMDMA signal 75Mhz 12-bit, 1Gbps Ethernet Digitally convert the signal to 125Mhz 8-bit.

The optical repeater 10 downsamples the signal converted in step S13. For example, the optical repeater 10 downsamples a CDMA signal to 25 MHz 36 bits, a WCDMA signal to 25 MHz 36 bits, and a 1 Gbps Ethernet signal to 25 MHz 40 bits while maintaining a data rate of 2.8 Gbps. In addition, the optical repeater 10 downsamples LTE signals to 25 MHz 36 bits, WCDMA signals to 25 MHz 36 bits, and 1 Gbps Ethernet signals to 25 MHz 40 bits while maintaining a data rate of 2.8 Gbps. That is, the optical repeater 10 may downsample the data in the SRC block to convert the CDMA signal or the LTE signal and the WCDMA signal into 25 MHz 36 bits, and the 1 Gbps Ethernet signal into 25 MHz 40 bits.

The optical repeater 10 sequentially maps the downsampled signal in step S15. For example, the optical repeater 10 sequentially maps a CDMA signal, a WCDMA signal, and a 1 Gbps Ethernet signal, a signal for a wireless network method, to a wireless network method. In addition, the optical repeater 10 sequentially maps an LTE signal, a signal for a wireless network method, a WCDMA signal, and a 1 Gbps Ethernet signal for a wired network method.

Thereafter, the optical repeater 10 may transmit a signal mapped according to a plurality of network schemes at a 3 Gbps optical speed in step S17. For example, the optical repeater 10 may transmit a CDMA signal, a WCDMA signal, and a 1 Gbps Ethernet signal at a 3 Gbps optical speed. In addition, the optical repeater 10 may transmit an LTE signal, a WCDMA signal and a 1 Gbps Ethernet signal at a 3 Gbps optical speed.

5 is a flowchart illustrating a data transmission process in a data mapping method of an optical relay system according to an exemplary embodiment of the present invention.

Referring to FIG. 5, in the data mapping method of the optical relay system 100 according to an exemplary embodiment of the present invention, the optical repeater 10 deframes the optical signal received in step S21 and then sequentially separates the mapped signals. . For example, when the signal according to the wireless network method is a CDMA signal and the WCDMA signal, and the signal according to the wired network method is an Ethernet signal, the optical repeater 10 sequentially decodes the CDMA signal, WCDMA signal and 1 Gbps Ethernet signal. Map it. In addition, when the signal according to the wireless network method is an LTE signal and the WCDMA signal, and the signal according to the wired network method is an Ethernet signal, the optical repeater 10 sequentially demaps the LTE signal, WCDMA signal and 1 Gbps Ethernet signal. .

The optical repeater 10 upsamples each of the signals separated in step S23 by maintaining a data rate. For example, the optical repeater 10 upsamples the separated signal to 75Mhz 12 bits, the WCDMA signal to 75Mhz 12 bits, and the 1Gbps Ethernet signal to 125Mhz 8 bits by maintaining respective data rates. In addition, the optical repeater 10 may upsample the LTE signal to 75Mhz 12 bits, the WCDMA signal to 75Mhz 12bit, and the 1Gbps Ethernet signal to 125Mhz 8bit by maintaining separate data rates. That is, the optical repeater 10 upsamples the data in the SRC block to convert the CDMA signal into 75 MHz 12 bits, the WCDMA signal into 75 MHz 12 bits, and the 1 Gbps signal into 125 MHz 8 bits. In addition, the optical repeater 10 may upsample the data in the SRC block to convert the LTE signal into 75 MHz 12 bits, the WCDMA signal into 75 MHz 12 bits, and the 1 Gbps signal into 125 MHz 8 bits. Then, the optical repeater 10 converts the upsampled digital signal into an analog signal in step S25. That is, the optical repeater 10 may restore the signal and the Ethernet signal for the wireless network method. Thereafter, the optical repeater 10 may transmit the converted signal to a mobile communication terminal or a wired device.

6 and 7 are exemplary diagrams for describing a data mapping method of an optical relay system according to an exemplary embodiment of the present invention.

When the signal for the wireless network method according to an embodiment of the present invention is a CDMA signal and a WCDMA signal, the optical repeater 10 may convert the CDMA signal for the wireless network method received from the base station into 75 MHz 12 bits and the WCDMA signal into 75 MHz 12 bits. To convert. The optical repeater 10 downsamples the converted CDMA signal to 25Mhz 36 bits, the WCDMA signal to 25Mhz 36 bits, and the 1Gbps Ethernet signal, which is a signal for the wired network method, to 25Mhz 40bit while maintaining a data rate of 2.8Gbps. Thereafter, the optical repeater 10 may sequentially map a signal for a wireless network method and a signal for a wired network method. For example, as illustrated in FIG. 6, the optical repeater 10 may sequentially map a CDMA signal corresponding to a signal for a wireless network method, a WCDMA signal, and a 1 Gbps Ethernet signal corresponding to a signal for a wired network method. have.

The optical repeater 10 transmits a signal for a wireless network method and a signal for a wired network method at an optical speed. For example, as illustrated in FIG. 7, the optical repeater 10 may transmit a CDMA signal, a WCDMA signal, and a 1 Gbps Ethernet signal at a 3 Gbps optical speed.

In addition, when the signal for the wireless network method according to an embodiment of the present invention is the LTE signal and the WCDMA signal, the optical repeater 10 is a 75Mhz 12-bit LTE signal for the wireless network method received from the base station, WCDMA signal 75Mhz 12 Convert to bits. The optical repeater 10 downsamples the converted LTE signal to 25Mhz 36 bits, the WCDMA signal to 25Mhz 36 bits, and the 1Gbps Ethernet signal, which is a signal for the wired network method, to 25Mhz 40bit while maintaining a data rate of 2.8Gbps. Thereafter, the optical repeater 10 may sequentially map a signal for a wireless network method and a signal for a wired network method. Then, the optical repeater 10 transmits a signal for a wireless network method and a signal for a wired network method as an optical signal. That is, the optical repeater 10 may simultaneously transmit LTE signals, WCDMA signals and 1 Gbps Ethernet signals at a 3 Gbps optical speed.

It should be noted that the embodiments of the present invention disclosed in the present specification and drawings are only illustrative of specific examples for the purpose of understanding and are not intended to limit the scope of the present invention. It is apparent to those skilled in the art that other modifications based on the technical idea of the present invention can be carried out in addition to the embodiments disclosed herein.

The present invention is applied to various types of user devices such as mobile terminals, PMPs, PDAs, laptops, and MP3 players, and simultaneously transmits a plurality of communication signals generated from different networks, thereby making mobile and wired communications an efficient method. It is possible to reduce the investment cost by transmitting to the destination, and it is possible to transmit signals for multiple network methods using one SFP, and to provide services using the existing infrastructure to the maximum. In addition, by applying a data compression algorithm using the digital signal processing of the optical repeater, data can be converted into the digital signal repeater without modification of the digital signal processing without adding wavelength or changing the optical frame. Because of the simple digital signal processing, a stable signal can be obtained without problems of device resources and signal delay. In addition, since the optical repeater reduces idle capital, enables efficient network configuration with minimum cost, maintenance cost reduction, and flexibility of base station site selection, centralized base station installation capable of remote connection is possible. In addition, it is possible to optimize the system by redistributing channels according to the call volume, thus maintaining the highest quality, maximizing customer satisfaction. In addition, due to the diversification of the transmission and reception contacts, it is possible to eliminate the large building shadow area.

10: optical repeater 20: donor part
21: first transmitter 22: first receiver
30: remote unit 31: second transmitting unit
32: second receiving unit 40: optical cable
50: base station 60: mapping device
70: transmitting unit 71: signal mapping unit
72a, 72b: ADC 73a, 73b, 73c: SRC
80: receiver 81: signal demapping unit
82a, 82b: ADC 83a, 83b, 83c: SRC
100: optical relay system

Claims (18)

A plurality of analog to digital converters (ADCs) for converting signals for at least one wireless network scheme into digital signals;
A plurality of sampling rate converters (SRCs) for downsampling the converted digital signals and signals according to a wired network scheme; And
A signal mapping unit sequentially mapping the downsampled signal into an optical signal;
Transmitter for optical relay comprising a. The method of claim 1, wherein the SRC is
And a digital signal for the at least one wireless network scheme and a signal for the wired network scheme, and sequentially mapping the sampled signals. The method of claim 2, wherein the SRC is
And a digital conversion signal for the wireless network method and the wired network method at a predetermined frequency and bit rate, respectively. The method of claim 1, wherein the signal mapping unit
And downsampling a signal for each network scheme at a predetermined frequency and a bit rate while maintaining a predetermined data rate. The method of claim 4, wherein the signal mapping unit
Transmitter for optical relay, characterized in that for sequentially mapping the signal for each network scheme. The method of claim 5, wherein the signal mapping unit
Transmitting apparatus for optical relay, characterized in that for transmitting the signal for each of the network scheme at a constant light speed. A signal demapping unit for sequentially dividing and dimapping the optical signal into signals corresponding to a plurality of network methods;
A plurality of SRCs for upsampling the demapped signal while maintaining a data rate according to each network scheme; And
A plurality of ADCs for restoring a signal for a wireless network scheme among the upsampled signals;
Receiver for optical relay comprising a. The method of claim 7, wherein the signal demapping unit
And receiving the optical signal and sequentially demapping the signals into a plurality of network schemes, and sampling the de-mapped signals. The method of claim 7, wherein the signal demapping unit
Receiver for optical relay, characterized in that for sequentially demapping the signals for the plurality of network schemes. The method of claim 9, wherein the SRC is
And up-sampling signals for the plurality of network schemes at a predetermined frequency and bit rate while maintaining a preset data rate. A plurality of ADCs for converting a signal for at least one wireless network scheme into a digital signal, a plurality of SRCs for downsampling the digital signal and a wired network scheme, and the downsampled signals in sequence to an optical signal A transmitter including a signal mapping unit
A signal demapping unit for sequentially separating and demapping optical signals into signals corresponding to a plurality of network schemes, and a plurality of SRCs for upsampling the demapped signals while maintaining data rates according to respective network schemes; A cloud computing system, comprising: a receiver comprising a plurality of ADCs for restoring a signal for a wireless network method among upsampled signals; Sampling each signal corresponding to a plurality of network schemes;
Sequentially mapping the sampled plurality of signals; And
Transmitting the mapped signal as an optical signal;
Data mapping method for optical relay comprising a. The method of claim 12, wherein prior to the sampling step,
Converting a signal corresponding to a wireless network method into a digital signal among the signals corresponding to the plurality of network methods;
Data mapping method for optical relay, characterized in that it further comprises. 13. The method of claim 12, wherein said sampling is
And downsampling a signal for the at least one wireless network method and a signal for a wired network method. Receiving an optical signal;
Separating signals sequentially mapped to a plurality of signals corresponding to a plurality of network schemes from the optical signals; And
Sampling the separated plurality of signals while maintaining a data rate according to a network scheme;
Data mapping method for optical relay comprising a. The method of claim 15, wherein after the sampling step,
Converting and reconstructing a signal for a wireless network method among the sampled signals into a digital signal;
Data mapping method for optical relay, characterized in that it further comprises. The method of claim 15, wherein the sampling is
Up-sampling the signal for each network scheme. The method of claim 12 or 15, wherein the plurality of signals corresponding to the plurality of network schemes are
Signals corresponding to a wireless network method including at least one of CDMA, WCDMA, GSM, GPRS, HSDPA, HSUPA and LTE and a wired network method including one of a cable modem, Ethernet and DSL. Data mapping method.

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