KR20100096357A - System for providing high speed internet service using passive optical network through existing mmf optical cables in apartment complexes - Google Patents

Abstract

The present invention relates to a passive optical subscriber network system for providing a high-speed Internet service by using a passive optical network (PON) technology using an MMF optical path installed in a multi-unit house.

To this end, a passive optical subscriber network (PON) system according to the present invention comprises a fiber optic terminator and a first remote node (RN) connected to the optical fiber terminator via an SMF optical beam and performing switching between single mode and multimode. Remote nodes, a plurality of second remote nodes RN connected to the first remote node through an MMF optical path, and performing multimode and single mode switching, and the second remote node RN via an SMF optical fiber. And a plurality of optical communication network units for transmitting a communication signal from the subscriber station to the second remote node and transmitting the broadcast or communication signal received from the second remote node to the subscriber station. It is done.

Description

SYSTEM FOR PROVIDING HIGH SPEED INTERNET SERVICE USING PASSIVE OPTICAL NETWORK THROUGH EXISTING MMF OPTICAL CABLES IN APARTMENT COMPLEXES}

The present invention relates to a passive optical network (PON) system for providing FTTH (Fiber to the Home) service. The present invention relates to a passive optical subscriber network system for providing an Internet service.

In general, the FTTH service is a high-speed data service by connecting an optical cable from a telephone station to a subscriber's home in a subscriber network environment to provide high-speed Internet service. The network configuration for providing such FTTH service can be classified into Home Run, AON (Active Optical Network), and PON (Passive Optical Network).

At present, high-speed Internet service providers provide high-speed Internet service using AON technology mainly to provide 100Mbps high-speed Internet service to apartment complexes such as apartments.

As described above, a system configuration for providing high-speed Internet service using the AON technology will be described with reference to FIG. 1.

Referring to FIG. 1, an AON system for providing high-speed Internet service includes an L3 switch 102 in a communication station 100, an L3 switch 112 located in a main distribution frame (MDF) 110, and a plurality of copper undergrounds. L2 switch (122, 124, 132) located in the, and includes a plurality of subscriber stations that are subscribers (140, 142).

At this time, the SMF is installed between the L3 switch 102 and the L3 switch 112 located in the MDF 110, and between the L3 switch 112 and the L2 switches 122, 124, and 132 in the basement 120 and 130. SMF or MMF is installed. In addition, a UTP cable is installed between the L2 switches 122, 124, and 132 in the basement 120 and 130 and the subscriber terminals of the subscriber stations 140 and 142. Here, the underground basement means one underground basement in the same house as the apartment. For example, 101, 102,... In an apartment consisting of 110 buildings, an L2 switch is installed in the basement of each building.

As such, both the SMF and the MMF can be installed in the L3 switch 112 located in the MDF 110, which is an optical path section in the apartment, and the L2 switch 122, 124, and 132 in the underground 120 and 130. In the early days of service, MMF was installed as a relatively low investment.

As described above, in the case of providing high-speed Internet service using the AON technology, an SMF or MMF is installed between the MDF room 110 and the basement 120 and 130 of the apartment house, and then the service is provided by sharing a 100Mbps trunk. do.

However, in recent years, the high-speed Internet service traffic has exploded due to the proliferation of PTP, web hard, and the recent introduction of quality-guaranteed services such as IPTV and VoIP, requiring the need to increase the existing 100Mbps trunk. have.

Trunk acceleration can be done by upgrading the existing AON 100Mbps trunk to 1Gbps, or upgrading to 1.25Gbps or 2.5Gbps using the new Passive Optical Network (PON) technology. .

Among these methods, PON technology, which is used to upgrade the speed by using PON technology, reduces the optical cable investment cost compared to AON technology consisting of point to multi point (PtM) between communication company and subscriber. It has the advantage of easy maintenance by using passive element called RN (Remote Node) at branch point.

However, PON technology is applicable only to SMF-based, so it is not applicable to common houses that are pre-configured with MMF to provide high speed internet service using AON technology.

In order to apply PON technology to a common house that provides high-speed Internet service using AON technology, MMF should be replaced with SMF. However, when the optical cable is replaced in this way, a huge cost arises.

Accordingly, technology development is required to provide high-speed Internet service using PON technology without replacing the existing MMF in the common house where the MMF is already installed.

Therefore, the present invention is a passive type for providing broadband high-speed Internet service using PON technology without replacing the existing MMF with SMF in the apartment house where the MMF is already installed and serviced by AON (Active Optical Network) technology. An optical subscriber network system is provided.

The present invention for achieving the above, in the passive optical subscriber network system for providing a high-speed Internet service by using a passive optical network (PON) technology scheme using a MMF optical line of the apartment house, the optical fiber terminal device And a first remote node (RN) connected to the optical fiber terminator via a single mode fiber (SMF) optical fiber and performing switching between single mode and multi mode (MMF). And a plurality of second remote nodes (RN) connected to the first remote node via an MMF optical beam, performing a multimode and single mode switching, and connected to the second remote node RN via an SMF optical fiber; A plurality of optical communication network units (ONUs) for transmitting a communication signal from a subscriber station to the second remote node and transmitting a broadcast or communication signal received from the second remote node to the subscriber station. Characterized in that it comprises a.

According to an example of the invention, the first remote node (RN) is installed in the MDF (Main Distribute Frame) of the multi-family house, the second remote node (RN) is characterized in that is installed in the same basement of the apartment house.

According to an example of the present invention, the passive optical subscriber network is characterized in that it is one of various PON technology schemes such as E-PON (Ethernet PON) and G-PON (Gigabit PON).

According to an example of the present invention, the optical communication network unit is characterized by including a PON module for signal transmission and reception.

According to an example of the present invention, the first remote node includes an optical splitter having a structure in which a single waveguide of an SMF is branched into a plurality of optical waveguides, and a connecting unit for connecting an MMF with an optical fiber drawn from the optical splitter. It features.

According to an example of the present invention, the second remote node includes an optical splitter having a structure in which a single optical waveguide of an MMF is branched into a plurality of optical waveguides, and a connecting unit for connecting an SMF with an optical fiber drawn from the optical splitter. It is characterized by.

According to an example of the present invention, the service provided through the present invention is characterized in that it includes a high-speed Internet service, VoIP service, IPTV service and the like.

According to the present invention described above, without replacing the existing multi-mode optical cable with a single-mode optical cable in the apartment house equipped with a multi-mode optical cable, using broadband optical network (PON) technology, such as broadband high-speed Internet, IPTV, VoIP There is an advantage that can easily provide a service.

In addition, it is possible to minimize the cost incurred to increase the trunk by allowing PON technology to be applied to the common house where the MMF is installed without replacing the existing MMF.

DETAILED DESCRIPTION A detailed description of preferred embodiments of the present invention will now be described with reference to the accompanying drawings. It should be noted that the same components in the figures represent the same numerals wherever possible. Specific details are set forth in the following description, which is provided to provide a more thorough understanding of the present invention. In describing the present invention, when it is determined that a detailed description of a related known function or configuration may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted.

First, a passive optical subscriber network (PON) applied to the present invention includes a 1 × N passive optical splitter having a plurality of optical network units (ONUs) in one optical line termination (OLT). It is a subscriber network structure that forms a distributed topology of a tree structure by using a connection. In other words, the passive optical subscriber network is a communication system composed of a local base station that divides a downlink optical signal input from a central office (CO) and transmits it to a plurality of subscribers.

Hereinafter, in the present invention, when a part of an optical path is equipped with an MMF to provide a high-speed Internet service using the AON technology, when the network configuration is changed to the PON technology, the MMF can be changed to the PON technology without replacing the SMF. Let's take a look at how to do this.

Thus, in order to change the method for providing high-speed Internet service from AON technology to PON technology without replacing the optical cable, the present invention includes a mode converter in which an optical switching device is applied to an optical path between MMF and SMF. . Such a mode converter is configured to minimize light loss during mode switching.

Next, a system according to the present invention will be described with reference to FIG. 2.

FIG. 2 is a configuration diagram of a passive optical subscriber network system for providing high-speed Internet service in a passive optical subscriber network technology scheme according to an embodiment of the present invention. The system according to the present invention includes a single mode fiber (SMF) and a single mode optical fiber (SMF). Passive Optical Network (PON) system is a multi-mode fiber (MMF).

Referring to FIG. 2, a communication company including an L3 switch 210 and an optical line terminal (OLT) 220 connected to an IPTV network 200, an Internet network 202, and a VoIP network 204. Central Office (CO) 260, First Remote Node (RN) 232, Second Remote Node (RN) 242, 252 and Optical Network Unit (ONU) 243, 244, 253 , 254).

The L3 switch 210 located in the communication station (CO) 260 receives a broadcast signal or a communication signal from the IPTV network 200, the Internet network 202, and the VoIP network 204, switches downward, and communicates upward. The signal is switched upward to the IPTV network 200, the Internet network 202, and the VoIP network 204. The L3 switch 210 may be included in the OLT 220.

The OLT 220 is an optical fiber terminator and has a function of matching and distributing broadcast signals and Internet data communication signals to subscribers.

The first remote node (RN) 232 is installed in the MDF 230. In addition, the first remote node 232 is connected to the OLT 220 through the SMF optical fiber, and the second remote node 242, 252 via the MMF optical fiber.

The first remote node 232 is a device that performs a signal switching function between a multimode and a single mode for switching a single mode to a multimode and a multimode to a single mode.

The first remote node 232 may include an optical splitter having a structure in which a single waveguide of the SMF is branched into a plurality of optical waveguides, and a connecting unit for connecting the MMF with the optical fiber drawn from the optical splitter. This configuration can minimize light loss during mode switching.

Preferably, the number of branches of the first remote node 232 is eight.

The second remote node (RN) 242, 252 is installed under the same ground, is connected to the first remote node (RN) 232 via the MMF optical line, and the optical network unit (ONU) 243, 244 via the SMF optical fiber line. 253, 254).

In addition, the second remote node (RN) 242, 252 is a device for performing a signal switching function between the multi-mode and the single mode to switch the single mode to the multi-mode, single mode.

The structure of the second remote nodes 242 and 252 is similar to that of the first optical multiplier device. It may be provided with a connecting unit for connecting.

Preferably, the number of branches of the second remote nodes 242 and 252 is configured as four or two.

Optical network units (ONUs) 243, 244, 253, and 254 are connected to second remote nodes 242 and 252 by SMF optical lines, and include a PON module for transmitting and receiving signals.

The optical communication network units 243, 244, 253, and 254 receive broadcast signals and communication signals from optical fiber terminators and transmit them to subscriber stations (not shown) such as set-top boxes, and communication signals from subscriber terminals. Receives and transmits the light to the terminator.

As described above, a first remote node 232 capable of switching between multimode and single mode is installed in the MDF of the apartment house, and second remote nodes 242 and 252 capable of switching between single mode and multimode are installed in the basement. If you provide the service, you can provide broadband high-speed Internet, IPTV, VoIP, etc. by utilizing the multi-mode optical cable installed in the existing apartment.

At this time, the PON technology usable in the present invention is applicable to both E-PON (Ethernet PON) having a trunk speed of 1.25Gbps and G-PON (Gigabit PON) having 2.5Gbps.

Although embodiments of the present invention have been described above with reference to the accompanying drawings, those skilled in the art to which the present invention pertains may implement the present invention in other specific forms without changing the technical spirit or essential features thereof. I can understand that.

Therefore, since the embodiments described above are provided to completely inform the scope of the invention to those skilled in the art, it should be understood that they are exemplary in all respects and not limited. The invention is only defined by the scope of the claims.

1 is a system configuration for providing high-speed Internet service in the AON technology method according to the prior art,

2 is a system configuration diagram for providing high-speed Internet service in a PON technology scheme according to an embodiment of the present invention.

<Description of the symbols for the main parts of the drawings>

200: IPTV network 202: Internet network

204: VoIP network 210: L3 switch

220: OLT 230: MDF

232: first remote node (RN) 240, 250: underground

242, 252: second remote node (RN) 243, 244, 253, 254: ONU

Claims (6)

In a passive optical subscriber network system for providing high speed internet service using a passive optical network (PON) technology, With fiber termination, A first remote node (RN) connected to the optical fiber terminator via a single mode fiber (SMF) optical fiber and performing switching between single mode and multi mode (MMF); A plurality of second remote nodes (RN) connected to the first remote node via an MMF optical beam and performing multimode and singlemode switching; It is connected to the second remote node (RN) via an SMF optical fiber line, transmits a communication signal from a subscriber station to the second remote node, and transmits a broadcast or communication signal received from the second remote node to the subscriber station. Passive optical subscriber network system comprising a plurality of optical communication network unit. The passive type according to claim 1, wherein the first remote node (RN) is installed in the main distribution frame (MDF) of the multi-family house, and the second remote node (RN) is installed in the same basement of the multi-family house. Optical subscriber network system. 2. The passive optical subscriber network system according to claim 1, wherein the passive optical subscriber network is one of an Ethernet PON and an Ethernet GON. The optical communication network unit of claim 1, Passive optical subscriber network system comprising a PON module for transmitting and receiving signals. The method of claim 1, wherein the first remote node, An optical splitter having a structure in which a single waveguide of the SMF is branched into a plurality of optical waveguides, Passive optical subscriber network system comprising a connecting unit for connecting the MMF and the optical fiber drawn from the optical splitter. The method of claim 1, wherein the second remote node, An optical splitter having a structure in which a single optical waveguide of the MMF is branched into a plurality of optical waveguides, Passive optical network system comprising a connecting unit for connecting the optical fiber and the SMF drawn from the optical splitter.

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