KR101027735B1 - System and method for using optic line in common for difference communication services - Google Patents

Abstract

PURPOSE: A system for using an optical line of a different communication service is provided to maximize the use efficiency of system resources assigned to the optical line. CONSTITUTION: An optical line terminal(210) converts a wired communication signal into an optical signal. A remote node(220) branches off the optical signal to a plurality of optical paths. An optical main unit(230) transmits the wired communication signal and a wireless communication signal to the optical paths. An optical network terminal(250) demultiplexes the wired communication signal. The demultiplexed wired communication signal is transmitted to wired communication subscribers.

Description

Optical fiber sharing system of heterogeneous communication service and its operation method {SYSTEM AND METHOD FOR USING OPTIC LINE IN COMMON FOR DIFFERENCE COMMUNICATION SERVICES}

The present invention relates to an optical signal transmission system, and more particularly, to an optical sharing system for providing heterogeneous communication services and a method of operating the same.

Gigabit Ethernet Passive Optical Network (GE-PON), one of the optical signal transmission systems, uses multiple remote network terminals (ONTs) in one optical line termination (OLT) using a remote node (RN). Connect it. The GE-PON is a subscriber network structure that forms a distributed topology of a tree structure.

GE-PON is a FTTH (Fiber To The Home) technology that provides Gigabit Ethernet through an optical subscriber network, and can provide hundreds of Mbps high-speed multimedia services to general subscribers through one optical network. It is a feature that is less expensive than WDM-PON. It is a technology that realizes communication speed of 1Gbps through a public line network using optical cable, and it is attracting attention as a technology that greatly improves the communication speed of Internet connection service (FTTH) by optical cable.

By applying Gigabit Ethernet by conventional LAN, Ethernet frame is transmitted / received as it is from telephone station to home. As the conventional optical access technology used ATM in this section, the speed was limited to 100 Mbps due to the overhead of conversion. With the introduction of GE-PON, it is possible to provide 1Gbps bidirectional services.

1 is a block diagram of a general passive optical subscriber network system.

As shown in FIG. 1, a GE-PON (Gigabit Ethernet-passive optical network) includes a fiber optic termination (OLT 110), a remote node (RN 120), The optical distribution unit (ODN 130, Optical Distribution Network) of the Remote Node and the optical network termination device (ONT 140, Optical Network Terminal) on the subscriber side.

The passive equipment of the passive optical subscriber network in which the optical distribution unit 130 is located is composed of a single wavelength optical cable, a passive optical splitter, a connector, and a splice.

Active network devices such as the optical fiber terminator 110 or the plurality of optical network terminators 140 are located at both ends of the passive optical subscriber network. The optical fiber terminal terminating unit 110 multiplexes an optical signal input from the transmitter 111 for generating and transmitting a downlink optical signal, a receiver 113 for receiving an uplink optical signal, and an optical signal input from the transmitter 111, and a remote node ( And an optical multiplexing / demultiplexing unit 112 for demultiplexing the uplink optical signal input through the output to the receiver 113. At this time, the light multiplexing / demultiplexing is performed on the basis of the optical wavelength.

As shown in FIG. 1, the optical fiber terminator 140 includes a plurality of optical fiber terminators 140_1, a second optical fiber terminator 140_2, ..., and an n-th optical fiber terminator 140_n. consist of.

The first optical network termination device 140_1 generates a first uplink optical signal and transmits it, a transmitter 140_1B for receiving a downlink optical signal, a receiver 140_1C for receiving a downlink optical signal, and a first upward optical signal input from the transmitter 140_ 1B. Multiplexing and outputting to the remote node 120, and demultiplexing the downlink optical signal input through the remote node 120 and outputs to the receiving unit (140_ 1C) comprises a multiplexer / demultiplexer (140_1A) .

Similar to the first optical termination device 140_1, the n-th optical termination device 140_n includes a transmitter 140_nB for generating and transmitting an nth upward optical signal, a receiver 140_nC for receiving a downward optical signal, and the transmitter Optical multiplexing / multiplexing the n-th upward optical signal input from 140_nB and outputting to the remote node 120 and demultiplexing the downward optical signal input through the remote node 120 and outputting to the receiving unit 140_nC And a demultiplexer 140_nA.

The remote node (RN, 120) including the optical splitter 130 is a case where the optical signal transmitted through the passive optical subscriber network is a downlink optical signal, that is, an optical signal input from the optical path terminator 110. The optical signal inputted to the optical network termination device 140 is divided by the number and transmitted to each optical network termination device 140 through the optical fiber. In addition, when the optical signal transmitted through the passive optical subscriber network is an uplink optical signal, that is, when the optical signal input from each optical network terminator 140, it is combined with the optical fiber terminator 110 through one optical fiber To pass).

Passive optical subscriber networks are typically applied to subscriber-side optical termination devices in a point-to-multi-tree structure using a single fiber.

Conventionally, passive optical subscriber network has been able to provide various communication services (e.g., on-demand high-definition video service, HDTV broadcasting, high-speed Internet service, mobile communication service, etc.) quickly, but each communication service has a different optical path equipment and resource equipment. Since it had to be allocated, it was very expensive to construct the optical fiber for service provision.

In addition, since it is difficult to operate several communication services in one communication line, there is a problem that the efficiency of using the system and the optical line is inferior.

SUMMARY OF THE INVENTION An object of the present invention is to provide an optical path sharing system and a method of operating the same, which provide at least two or more communication services in one optical network such as a passive optical subscriber network.

Additional features and advantages of the invention will be set forth in the description which follows, and in part will be apparent from the description, or may be learned by practice of the invention. The objectives and other advantages of the present invention will be realized and attained by the structure particularly pointed out in the claims, as well as the following description and the annexed drawings.

The optical line sharing system according to the present invention is implemented to operate at least two or more heterogeneous communication services in a single optical fiber facility, thereby greatly reducing the economic cost of optical fiber construction and equipment purchase.

In addition, it is designed to operate several communication services in one optical network, maximizing the utilization efficiency of the optical path and system resources assigned to the optical path.

1 is a block diagram of a typical passive optical subscriber network system.
Fig. 2 is a block diagram of the optical path sharing system according to the first embodiment of the present invention.
Figure 3 is a block diagram of a GE-PON system showing in more detail OMU and ORU in accordance with a first embodiment of the present invention.
4 is a flow diagram of forward signal transmission of the optical fiber sharing system according to the first embodiment of the present invention;
Fig. 5 is a flow diagram of reverse signal transmission of the optical fiber sharing system according to the first embodiment of the present invention.
Fig. 6 is a block diagram of the optical path sharing system according to the second embodiment of the present invention.
7 is a flow diagram of forward signal transmission of the optical fiber sharing system according to the second embodiment of the present invention;
8 is a flowchart for reverse signal transmission of the optical fiber sharing system according to the second embodiment of the present invention.
*** Explanation of symbols for main parts of drawing ***
110, 210, 310: optical line terminator 120, 220, 320, 360: remote node
130: optical distribution unit 140, 250, 350: optical network termination device
230, 330: optical main unit 240, 340: optical remote unit

In order to achieve the above object, the optical path sharing system according to the present invention, in the forward communication service of the passive optical subscriber network,

An optical path terminator for receiving a wired communication signal from a network and converting the optical signal into an optical signal, a remote node for splitting an optical signal of the optical path terminator into a plurality of optical paths, and the optical path terminator received through the remote node An optical main unit multiplexing and transmitting a wireless communication signal received through a wired communication signal and an antenna to a plurality of optical paths; And an optical subunit which detects a wireless communication signal and wirelessly transmits it to a mobile terminal, and an optical network terminator that receives and demultiplexes the wired communication signal and delivers the subscriber to the wired communication signal.

In order to achieve the above object, the optical path sharing method according to the present invention, in the forward communication service of the passive optical subscriber network,

In the optical main unit, receiving a wired communication signal of the optical fiber termination device through a remote node and receiving a wireless communication signal through an antenna, and in the optical main unit, a plurality of the received wired communication signal and wireless communication signal Multiplexing and transmitting the optical signal to the optical path of the optical subunit, detecting the wired communication signal and the wireless communication signal from the received signal when the signal is received from the optical main unit, and detecting the detected signal from the optical subunit And transmitting the wired communication signal to the optical network termination device and wirelessly transmitting the detected wireless communication signal to the mobile terminal.

Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.

FIG. 2 is a block diagram of the optical path sharing system according to the first embodiment of the present invention.

GE-PON system according to the present invention using a 1 × N RN (Remote Node, 220) in one optical fiber terminal (OLT 210, Optical Line Termination) multiple optical network termination device (ONT 250, Optical Network Terminal) and the downstream data frame (for example, Internet Rx optical signal) transmitted from the optical fiber terminal (OLT) 210 to the optical main unit (OMU 230, Optical Main Unit). It is distributed to a plurality of optical network terminators (ONT 250_ # 1 to 250_ # n) and mobile communication terminals (not shown) through an optical remote unit (ORU 240). The optical path terminator (OLT) 210 is located at the root of the tree structure and plays a central role in providing information to each subscriber in the access network.

The present invention relates to a mobile communication Rx of an optical main unit (OMU) 230 for transmitting a downstream data frame (eg, an Internet Rx optical signal) transmitted from the optical path terminator (OLT) 210. Mobile communication with multiple optical network termination devices (ONT, 250_ # 1 ~ 250_ # n) via an optical remote unit (ORU 240) (or 'optical subunit') in combination with an optical signal Distributing data frames to terminals (not shown), and conversely, upstream data frames transmitted from a plurality of optical network termination devices (ONT) 250_ # 1 to 250_ # n and mobile communication terminals (not shown). The optical main unit (OMU) 230 and the optical remote unit (ORU 240, Optic Remote Unit) through a remote node (RN 220, Remote Node).

The optical fiber terminator 210 generates a data frame downstream of the Internet signal received from the network, converts it into an optical signal, and outputs the converted data frame.

When the remote node 220 transmits a data frame (for example, an Internet Rx optical signal) downstream from the optical fiber terminator (OLT) 210, the remote node 220 splits the transmitted data frame to the optical fiber. Each of the N optical signal coupling separation device stages 234C_ # 1 to 234C_ # n constituting the main unit OMU 230 is distributed. When receiving an upstream data frame from the optical signal coupling separation device stages 234C_ # 1 to 234C_ # n of the optical main unit OMU 230, the transmitted data frames are combined to terminate the optical path. To the device (OLT) 210.

The plurality of optical network termination devices (ONT, 250_ # 1 to 250_ # n) mean a device such as an optical Internet terminal that can be used in a passive optical network (PON) including a network terminal (NT). do.

3 is a block diagram of a GE-PON system showing in more detail an optical main unit (OMU) and an optical remote unit (ORU) in accordance with a first embodiment of the present invention.

As shown in FIG. 3, the optical main unit 200 is largely comprised of a wireless signal processor 232 and an optical multiplexer / demultiplexer 234.

The radio signal processor 232 generates a digital frame signal of the mobile communication Rx signal received through the antenna. Then, the mobile communication Tx signal applied from each branch (for example, optical signal coupling separation device stages 234C_ # 1 to 234C_ # n) is de-framed and transmitted through an antenna. For convenience of explanation, the signal transmitted in the forward direction (going from the OLT side to the ONT end) flow is called a mobile communication Rx signal or the Internet Rx signal, and the signal transmitted in the reverse direction (going from the ONT end to the OLT side) flow is a mobile communication signal. Tx signal or internet Tx signal.

The radio signal processor 232 may include a first RF signal input / output unit 232A for transmitting and receiving a radio signal (Radio Frequency signal) to and from a base station, and a second RF signal input / output for transmitting and receiving a radio signal (Radio Frequency signal) to and from a mobile terminal. The RF signal received through the unit 232B and the first RF signal input / output unit 232A (or the second RF signal input / output unit 232B) is converted into an IF (Intermediate Frequency) signal or an IF signal is converted into an RF signal. The RF / IF signal conversion unit 232C and the IF signal (analog signal) of the RF / IF signal conversion unit 232C to convert the digital signal or convert the digital IF signal to an analog signal to convert the RF / IF signal. The analog / digital signal converter 232D and the digital signal of the analog / digital signal converter 232D, which are transmitted to the unit 232C, are framed or each optical signal coupling separation device stage 234C_ # 1 to 234C_ # n After summing the electrical digital signal applied from It consists of a digital signal processing unit 232E.

The optical multiplexer / demultiplexer 234 includes an all-optical converter 234A, an optical distributor 234B, and N optical signal coupling separation device stages 234C_ # 1 to 234C_ # n. The all-optical converter 234A converts the electrical signal output from the wireless signal processor 232 into an optical signal. The light distribution unit 234B distributes the optical signal of the all-optical conversion unit 234A to each of the optical signal coupling separation device stages 234C_ # 1 to 234C_ # n.

Each of the N optical signal coupling device stages (for example, 234C_ # 1) constituting the optical multiplexing / demultiplexing unit 234 is a mobile communication applied from the optical distribution unit 234B to use one light path. Rx mobile communication Rx between the first optical signal combining / separating unit 234C_ # 1A and the first optical signal combining / separating unit 234C_ # 1A which loads the Rx optical signal into a designated optical path (e.g., optical path # 1). A second optical signal combination / adding additionally loads the Internet Rx optical signal of the optical path terminator (OLT) 210 applied through the remote node 220 to the optical path carrying the optical signal (for example, optical path # 1) It consists of a separating part 234C_ # 1B.

When the optical signal is received from the optical remote unit ORU (240_ # 1), the second optical signal combining / separating unit 234C_ # 1B separates the Internet Tx optical signal from the received optical signal and the remote node ( It is transmitted to the optical path terminator (OLT, 210) through the RN, 220.

The first optical signal combiner / separator 234C_ # 1A separates the mobile communication Tx optical signal from the optical signal received from the optical remote unit ORU (240_ # 1).

In addition, each of the N optical signal coupling device stages 234C_ # 1 to 234C_ # n converts the mobile communication Tx optical signal separated by the first optical signal coupling / separation unit 234C_ # 1A into an electrical signal. And a photoelectric conversion unit 234C_ # 1C to 234C_ # nC to transmit to the wireless signal processor 232.

The all-optical converter 234A generates a continuous digital optical signal by the continuous all-optical conversion. Preferably, the mobile communication Tx light signal and the Rx light signal have different wavelengths.

The optical remote unit ORU (eg, 240_ # 1) is largely composed of an optical signal coupling separation device 244 and a wireless signal processing unit 242.

When the output signal of the optical main unit (OMU) 230 is received, the optical signal coupling separation device 244 separates the Internet Rx optical signal from the received output signal and transmits the optical Rx optical signal to a corresponding optical network termination device. .

The wireless signal processor 242 de-frames the mobile communication Rx signal separated from the output signal of the optical main unit (OMU) 230 and wirelessly transmits the decoded Rx signal to the corresponding mobile communication terminal.

When the output signal of the optical main unit (OMU) 230 is received, the optical signal coupling separation device 244 separates the Internet Rx optical signal from the received output signal and transfers the optical Rx optical signal to a corresponding optical network termination device. A first optical signal combiner / separator 244A, a second optical signal combiner / separator 244B for separating a mobile communication Rx optical signal from the received output signal, and the separated mobile communication Rx optical signal It consists of the photoelectric conversion part 244C which converts into an electrical signal.

The optical signal coupling separation device 244 also includes an all-optical conversion unit 244D for converting an electrical signal (for example, a mobile communication Tx signal) applied from the wireless signal processing unit 242 into an optical signal.

The wireless signal processor 242 includes a digital signal processor 242E which de-frames an output signal (eg, a mobile communication Rx signal) of the photoelectric converter 242C-> 244C, and the digital signal processor 242E. The analog / digital signal converter 242D converts the output signal of the signal into an analog signal and transmits it to the RF / IF signal converter 242C, and the analog signal IF input from the analog / digital signal converter 242D. An RF / IF signal converter 242C for converting an (Intermediate Frequency) signal into an RF signal and transmitting the RF signal to an RF signal input / output unit 242B, or converting an RF signal received through an antenna into an IF signal. And an RF signal input / output unit 242B for transmitting and receiving a radio signal (Radio Frequency signal) with the mobile terminal.

As described above, each component of the radio signal processor 242 functionally performs the same operation as the radio signal processor 232 of the optical main unit OMU 230.

4 is a flowchart of a forward signal transmission of the optical path sharing system according to the first embodiment of the present invention.

As shown in FIG. 4, the optical fiber sharing system according to the first embodiment of the present invention includes a downstream data frame (for example, an Internet Rx optical signal) of an optical line termination (210). Distributed output to n optical paths through a remote node (RN 220, Remote Node) of × N. In addition, the data frames (eg, Internet Rx optical signals) distributed down and output are transmitted to the optical main units OMU 230 through respective optical paths # 1 to #n. )

The optical main unit OMU 230 receives the Internet Rx optical signals through the respective optical paths # 1 to #n, and moves through the wireless signal processor 232 as shown in FIG. 3. Receive the communication Rx signal.

The radio signal processor 232 of the optical main unit OMU 230 receives an RF signal (eg, a mobile communication Rx signal) through the first or second RF signal input / output unit 232A or 232B. In addition, RF / IF signal conversion, analog / digital signal conversion, and digital signal processing are performed on the received RF signal (eg, mobile communication Rx signal) to perform mobile communication Rx electrical digital frame signal. Create

Thereafter, the mobile communication Rx electrical digital frame signal is transmitted to the optical multiplexing / demultiplexing unit 234 and converted into an optical signal (mobile communication Rx optical signal) by the all-optical conversion unit 234A. In operation S120, the light distribution unit 234B is distributed to and transmitted to the N optical signal coupling separation device stages 234C_ # 1 to 234C_ # n. (S130)

When the N optical signal coupling separation device stages 234C_ # 1 to 234C_ # n respectively transmit the mobile communication Rx optical signals from the optical distribution unit 234B, the N optical signal coupling separation device stages 234C_ # 1 to 234C_ # n transmit the mobile communication Rx optical signals to the designated optical paths (eg, : Put on light path # 1). Further, the Internet Rx optical signal distributed from the optical line termination device 210 is additionally loaded on the optical path (for example, optical path # 1) on which the mobile communication Rx optical signal is carried. The mobile communication Rx optical signal and the Internet Rx optical signal on the optical path # 1 are transmitted to the optical remote unit ORU # 1 at a remote location.

Once the optical signal arrives from the optical main unit (OMU) 230, the optical remote unit (e.g. ORU # 1) first detects the Internet Rx optical signal and delivers it to the optical network terminator (e.g. ONT # 1). . In operation S140, the mobile communication Rx optical signal is detected and converted into an electrical mobile communication Rx signal through photoelectric conversion.

The wireless signal processor 242 of the optical remote unit ORU # 1 performs digital signal processing (deframing), digital / analog signal conversion, and IF / RF signal conversion on the mobile communication Rx signal converted into the electrical signal. By performing the following steps, a radio transmitting RF signal (eg, a mobile communication Rx signal) is generated. Then, the antenna is wirelessly transmitted to the corresponding mobile communication terminal through the antenna. (S150)

5 is a flow diagram of reverse signaling of an optical path sharing system according to a first embodiment of the present invention.

As shown in FIG. 5, the optical network terminators ONT # 1 to ONT # n of the optical path sharing system according to the present invention transmit an upstream data frame (eg, an Internet Tx optical signal) through an optical line. Each one passes to the corresponding optical remote unit (ORU # 1 to ORU # n). (S210)

The optical remote units ORU # 1 to ORU # n receive the Internet Tx optical signals through the optical path, and receive the mobile communication Tx signal through the wireless signal processing unit 242 as shown in FIG. .

The radio signal processor 242 of the optical remote unit (ORU) 240 receives the RF signals of the mobile communication terminals through the RF signal input / output unit 242B. In addition, RF / IF signal conversion, analog / digital signal conversion, and digital signal processing are performed on the received RF signal (eg, mobile communication Tx signal) to generate a mobile communication Tx frame signal. .

Thereafter, the mobile communication Tx frame signal is transmitted to the optical signal coupling separation device 244, and is converted into an optical signal (mobile communication Tx optical signal) by the all-optical converter 244D. In operation S220, the second optical signal combining / separating unit 244B of the optical remote unit ORU 240_ # 1 mounts the converted mobile communication Tx optical signal on a designated optical path (eg, optical path # 1). In addition, the first optical signal combiner / separator 244A further includes an Internet Tx optical signal transmitted from the optical network terminator (for example, ONT # 1) to which the mobile communication Tx optical signal is loaded. To # 1). The mobile communication Tx optical signal and the Internet Tx optical signal on the optical path # 1 are transmitted to an optical main unit (OMU) 230 located at a remote location. (S230)

When the optical signal is received from the remote units ORU # 1 to ORU # n, the optical main unit 230 has the optical paths # 1 to #n separated by branches # 1 to #n. A signal is continuously received from each optical remote unit ORU # 1 to ORU # n.

Once the optical signal is received from the optical remote units ORU # 1 to ORU # n, the optical multiplexing / demultiplexing unit 234 of the optical main unit OMU 230 transmits a mobile communication Tx optical signal from the received optical signal. Signal and internet Tx optical signal.

That is, the N optical signal coupling separation device stages 234C_ # 1 to 234C_ # n constituting the optical multiplexing / demultiplexing unit 234 first detect an Internet Tx optical signal to provide a remote node (RN, 220). Through the optical fiber terminator (OLT, 210). In operation S240, the mobile communication Tx optical signal is detected and converted into an electrical mobile communication Tx signal through photoelectric conversion. The mobile communication Tx signals of the N optical signal coupling separation device stages 234C_ # 1 to 234C_ # n converted into electrical signals are transmitted to the wireless signal processor 232.

The digital signal processor 232E of the wireless signal processor 232 de-frames these signals when the mobile communication Tx signals are received from the N optical signal coupling separation device stages 234C_ # 1 to 234C_ # n. (summing) the output. The wireless signal processor 232 performs digital / analog signal conversion and IF / RF signal conversion to generate a radio transmitting RF signal (eg, a mobile communication Tx signal). Then, the antenna is wirelessly transmitted to the base station through the antenna. (S250)

When the optical main unit (OMU) 230 detects the Internet Tx optical signal and transmits it to the remote node (RN, 220), the optical main unit (OMU) 230 transmits a signal according to a time division multiplex (TDM) scheme of a burst mode. The optical main unit (OMU) 230 according to the present embodiment is allocated a time interval for transmitting an optical signal, and divides the optical signal into a predetermined size. The optical signal of the divided size is transmitted to the remote node (RN, 220).

Fig. 6 is a block diagram of the optical path sharing system according to the second embodiment of the present invention.

In the optical path sharing system according to the second embodiment of the present invention, as shown in FIG. 6, 1 between the optical path terminators OLT 310 and the optical network terminators ONT 350_ # 1 to 350_ # n. When the remote node (RN) of xN has a two-stage system structure, the optical main unit (OMU) 330 and the optical remote unit stage (ORU, 340) are disposed between the remote nodes (RN), respectively. Thus, the optical fiber sharing system of mobile communication service and Internet service and its operation method are implemented.

Operation and configuration of the optical main unit (OMU) 330 and the light source unit (ORU, 340A_1 ~ 340A_n, 340B_1 ~ 340B_n, ... 340M_1 ~ 340M_n) of the present embodiment is the first embodiment of the present invention. Is identical to the optical main unit OMU 230 and each light source unit OROR 240_ # 1 to 240_ # n.

7 is a flowchart of a forward signal transmission of the optical path sharing system according to the second embodiment of the present invention.

As shown in Figs. 6 and 7, the optical fiber sharing system according to the second embodiment of the present invention has a downstream data frame (eg, Internet Rx optical fiber) of an optical line termination 310. Signal is distributed to n optical paths through a 1 × N remote node (RN # 1 320, Remote Node). The distributed down stream data frames (eg, Internet Rx optical signals) are transmitted to the optical main units OMU 330 through respective optical paths # 1 to #n. (S310)

The optical main unit (OMU) 330 receives the Internet Rx optical signals through the respective optical paths # 1 to #n, while receiving the mobile communication Rx signal through the wireless signal processor as in the first embodiment. The mobile communication Rx optical signal is generated by performing certain processes (for example, RF / IF signal conversion, analog / digital signal conversion, digital signal processing (framing), all-optical conversion, etc.). (S320)

Then, through the optical distribution unit, the mobile communication Rx optical signal and the Internet Rx optical signal provided from the optical path terminator (OLT) 310 are loaded in the respective optical paths # 1 to #n, and then the remote node RN #. 2 (360_1 ~ 360_n)). (S330)

When each of the remote nodes RN # 2 360 receives an optical signal from the optical main unit OMU 330, the remote node splits the received optical signal into N optical paths, and then each optical remote unit again. Send to (340). (S340)

Thereafter, the optical remote units 340A_1 to 340A_n, 340B_1 to 340B_n,... 340M_1 to 340M_n, when an optical signal of the remote node RN # 2 360 is received, first from the received optical signal, the Internet. The Rx optical signal is detected and transmitted to the corresponding optical end devices 350A_1 to 350A_n, 350B_1 to 350B_n, 350M_1 to 350M_n. (S350) Then, the mobile communication Rx optical signal is detected and electrically moved through photoelectric conversion. Converts to communication Rx signal.

The optical remote unit (ORU) performs digital signal processing (de-framing), digital / analog signal conversion, and IF / RF signal conversion on the mobile communication Rx signal converted into the electrical signal. Generates a radio transmitting RF signal (eg, mobile communication Rx signal). Then, the antenna is wirelessly transmitted to the corresponding mobile communication terminal through the antenna. (S360)

8 is a flowchart of reverse signaling of an optical fiber sharing system according to a second embodiment of the present invention.

6 and 8, the optical fiber termination devices 350A_1 to 350A_n, 350B_1 to 350B_n,... 350M_1 to 350M_n of the optical fiber sharing system according to the present invention are upstream data frames (e.g., : Internet Tx optical signal) is transmitted to the corresponding optical remote units 340A_1 to 340A_n, 340B_1 to 340B_n, 340M_1 to 340M_n through the optical lines, respectively. (S410)

The light emitting units 340A_1 to 340A_n, 340B_1 to 340B_n,... 340M_1 to 340M_n receive the Internet Tx optical signals through an optical path, and, as in the first embodiment, through the wireless signal processor, the mobile communication Tx. Receives a signal, and performs certain processes (eg, RF / IF signal conversion, analog / digital signal conversion, digital signal processing (framing), all-optical conversion, etc.) to generate a mobile communication Tx optical signal. (S420)

Then, the mobile communication Tx optical signal and the Internet Tx optical signal provided from the optical network terminators 350A_1 to 350A_n, 350B_1 to 350B_n,... 350M_1 to 350M_n are loaded on respective optical paths, and then the remote node RN # 2 ( 360_1 ~ 360_n)). In this case, the process of transferring the mobile communication Tx optical signal and the Internet Tx optical signal to each of the optical paths to the remote node (RN # 2 (360_1 to 360_n)) is performed by time division multiplexing in burst mode (Burst mode). TDM) method. Each light source unit (ORU, 340) according to the present embodiment is allocated a time interval for transmitting the optical signal, and divides the optical signal into a predetermined size. The optical signal of the divided size is transmitted to the remote node (RN # 2 360).

When each of the remote nodes RN # 2 360 receives an optical signal from the optical remote unit ORU 340, the remote nodes RN # 2 combine the signals of the multiple optical paths and load them in one optical path, and then the optical main unit 330 again. Send it out. In this case, the optical signal is combined by the optical wavelength division multiplexing (WDM).

Thereafter, when the optical signal is received from the remote node # 2 (RN # 2 360), the optical main unit (OMU) 330 detects a mobile communication Tx optical signal and an Internet Tx optical signal from the received optical signal. At this time, the mobile communication Tx optical signal is a TDM signal.

The optical main unit (OMU) 330 first detects and transmits the Internet Tx optical signal to the optical path terminator (OLT) 310 through the remote node # 1 (RN # 1, 320). In operation S450, the mobile communication Tx optical signal is detected and converted into an electrical mobile communication Tx signal through photoelectric conversion.

The wireless signal processor of the optical main unit (OMU) 330 performs digital signal processing (de-framing), digital / analog signal conversion, and IF / RF signal conversion on the converted mobile communication Tx signal. Generates a radio transmitting RF signal (eg, mobile communication Rx signal). Then, the antenna is wirelessly transmitted to the base station through the antenna. (S460)

Although the present invention refers to a mobile communication service & internet service as a heterogeneous communication service, various wired / wireless multimedia communication services such as on-demand high definition video service, HDTV broadcasting, high speed multimedia service, and video response service can be applied.

Although the present invention has been described with reference to the embodiment (s) shown in the drawings, this is merely exemplary, and various modifications can be made therefrom by those skilled in the art, and the embodiments described above ( It will be appreciated that all or some of these may be optionally combined. Accordingly, the true scope of the present invention should be determined by the technical idea of the appended claims.

The optical line sharing system according to the present invention is implemented to operate at least two or more heterogeneous communication services in one optical fiber facility, thereby greatly reducing the economic cost of optical fiber construction and equipment purchase.

In addition, it is designed to operate several communication services in one optical network, maximizing the utilization efficiency of the optical path and system resources assigned to the optical path.

Claims (14)

In forward communication service of passive optical subscriber network,
An optical path terminator for receiving a wired communication signal from a network and converting the optical signal into an optical signal;
A remote node for branching the optical signal of the optical path terminator to a plurality of optical paths;
An optical main unit for multiplexing and transmitting a wired communication signal of the optical path terminator received through the remote node and a wireless communication signal received through an antenna to a plurality of optical paths;
An optical sub-unit which detects a wired communication signal from a received signal and transmits it to an optical network termination device when a signal is received from the optical main unit, and detects a wireless communication signal and wirelessly transmits it to a mobile terminal;
Receiving the wired communication signal and demultiplexed, and then comprises an optical network termination device for transmitting to subscribers,
When reverse communication of the passive optical subscriber network is performed,
The optical sub unit receives a wired communication signal from the optical network termination device, receives a wireless communication signal from a mobile terminal, and transmits the optical communication signal to the optical main unit through an optical path.
When the optical main unit receives a signal from the optical sub unit, the optical main unit detects a wired communication signal from the received signal and transmits the signal to the optical fiber terminator through the remote node, detects a wireless communication signal, and transmits it to a wireless communication network, Since the optical path is separated for each branch, the optical path sharing system, characterized in that to receive the signal from each branch continuously. delete delete delete The optical main unit of claim 1,
And when a signal is received from the optical subunit, detects a wired communication signal from the received signal and transmits the wired communication signal to the remote node according to a time division multiplex (TDM) scheme in a burst mode. The optical main unit of claim 1, wherein the optical main unit includes:
A wireless signal processor for generating a digital frame signal of a wireless communication signal received through an antenna;
And an optical multiplexing / demultiplexing unit converting the generated digital frame signal into an optical signal and multiplexing the same, and transmitting the multiplexed digital signal to the optical path along with a wired communication signal of the optical fiber terminator. The method of claim 6, wherein the wireless signal processing unit
RF signal input and output unit for transmitting and receiving an RF signal with the base station;
An RF / IF signal converter for converting the RF signal into an IF signal;
An analog / digital signal converter for converting the analog IF signal into a digital signal;
And a digital signal processor configured to frame the digital signal to generate an electrical mobile communication Rx signal. The method of claim 1, wherein the optical sub unit
An optical signal coupling separation device that separates a wired communication signal from the received output signal and transmits it to the optical network termination device when the output signal of the optical main unit is received;
And a wireless signal processing unit which de-frames a wireless communication signal separated from an output signal of the optical main unit, and then wirelessly transmits it to a mobile terminal. In forward communication service of passive optical subscriber network,
Receiving, at the optical main unit, a wired communication signal of an optical fiber terminator through a remote node and a wireless communication signal through an antenna;
Transmitting, by the optical main unit, the received wired communication signal and the wireless communication signal by multiplexing on a plurality of optical paths;
Detecting, at an optical subunit, the wired communication signal and a wireless communication signal in a received signal when a signal is received from the optical main unit;
Transmitting, by the optical subunit, the detected wired communication signal to an optical network terminator, and wirelessly transmitting the detected wireless communication signal to a mobile terminal;
When reverse communication of the passive optical subscriber network is performed,
Receiving, by the optical subunit, a wired communication signal from the optical network terminator and a wireless communication signal from a mobile terminal to transmit to the optical main unit through an optical path;
In the optical main unit, if a signal is received from the optical sub-unit, detecting a wired communication signal from the received signal, and transmits the signal to the optical fiber terminal through the remote node, and detects the wireless communication signal and transmits it to the wireless communication network It is made, including
The optical main unit is a light path sharing method, characterized in that for receiving the signal from each branch because the optical path is separated for each branch. delete delete In forward communication service of passive optical subscriber network,
An optical main unit for multiplexing and transmitting a wired communication signal of the optical path termination device received through the first remote node and a wireless communication signal received through the antenna to a plurality of optical paths;
A second remote node for branching and transmitting the received signal to a plurality of optical paths when a signal of the optical main unit is received;
When the signal of the second remote node is received, and detects the wired communication signal from the received signal and transmits to the optical network termination device, and the optical sub-unit for detecting and transmitting the wireless communication signal to the mobile terminal, characterized in that it comprises a Fiber Channel Sharing System. The optical subunit of claim 12, wherein when the reverse communication of the passive optical subscriber network is performed,
And receiving a wired communication signal from the optical network termination device and receiving a wireless communication signal from a mobile terminal, and transmitting the wired communication signal to the second remote node through the optical path. The method of claim 13, wherein the optical sub unit,
And transmitting the wired communication signal and the wireless communication signal to the second remote node according to a time division multiplex (TDM) scheme.

Images