KR20050073915A - Convergence system of broadcasting and telecommunication for embodiment one board to subscriber divided network - Google Patents

Abstract

The present invention provides an apparatus for reducing the size of a subscriber distribution network when designing a subscriber distribution network in a broadcasting communication convergence system. In the subscriber distribution network of the broadcast communication convergence system, a Gigabit connection converter for receiving an Ethernet signal, a serializer / deserializer (SERDES) for converting a signal output from the Gigabit connection converter into serial data, and the SERDES and A switch device connected to and having a Serial Media Independent Interface (SMII) / Source Syncronous SMII (SSII) interface, an SMII / MII interface for converting an SMII / SSSMISS interface received from the switch device into a Media Independent Interface (MII) interface, A subscriber switching device for combining the Ethernet signal output from the SMII / MII interface in a TDM manner with a broadcast signal (MPTS) transmitted from a backplane, a subscriber optical transceiver for receiving data output from the subscriber switching device, and the subscriber The signal output from the optical transceiver It characterized in that the device includes a physical layer to output to the switching device.

Description

CONVERGENCE SYSTEM OF BROADCASTING AND TELECOMMUNICATION FOR EMBODIMENT ONE BOARD TO SUBSCRIBER DIVIDED NETWORK}

The present invention relates to a broadcasting communication convergence system using a FTTH (Fiber To The Home) network, and more particularly, to an apparatus for reducing the size of a subscriber distribution network when designing a subscriber distribution network in a broadcasting communication convergence system.

Existing analog broadcasting has disadvantages such as deterioration of image quality due to noise, ghost, etc., inefficient use of broadcasting frequency resources, inability to integrate data service, and meets the demands of high quality / high quality as consumer demand increases. Digital broadcasting technology has been developed rapidly. In the case of digital broadcasting, broadcast data is transmitted using MPEG-2 TS (Transport Stream). One of the most important benefits of digitizing broadcasts is the ability to send more channels of broadcast to existing media.

In addition, as a focus on FTTH (Fiber-To-The-Home) as a method of convergence of broadcast communication including digital broadcasting and communication, the expansion of multi-channel that a service provider provides to subscribers and Acceptance is of interest. FTTH (Fiber-To-The-Home) is a network configuration method that establishes square ratio by constructing optical cable to subscriber's house in residential area and configures demand for communication line in the home. It will provide the foundation for fully integrating broadcast networks and services. This can be achieved by fiberizing the final coaxial cable portion connected to the subscriber's premises.

Using such FTTH technology, high definition television (HDTV) broadcasting and terrestrial broadcasting are provided to each subscriber in the form of a moving picture expert group (MPEG) -TS (Transport Stream). As such, a transmission system that provides broadcasting and communication services to subscribers through an optical fiber transmission path is called a broadcasting communication convergence system. The subscriber distribution network of the broadcast communication convergence system will be described with reference to FIG. 1. 1 is a diagram illustrating a subscriber distribution device in a general broadcasting communication convergence system.

In the subscriber distribution network of the broadcasting communication convergence system, a commercial network switch having a subscriber optical transmitter and receiver (118, 120) and 100Mbase-T and a fiber optic transmission network must have a structure as shown in FIG. The subscriber optical transmitters 118 and 120 and the L2 switch 110 may be configured in two types according to the structure of the subscriber distribution network. In a first structure, a 100 Mbps Fast Ethernet signal is integrally connected to the subscriber optical transceiver 120 in the form of 100base-F. In addition, the second structure is a structure connected to the subscriber switching device 116 as the output of the MII (Media Independent Interface) to pass through the subscriber switching device 116 for a separate processing to 100Mbps Fast Ethernet (Fast Ethernet) signal. The subscriber switching device 116 transmits data to the subscriber optical transceiver 118 through MPDM, which is digital broadcast data, and Ethernet data, which is communication data, through a Time Division Mutiplexing (TDM) method.

In the first of the above structures, the network switch 110 is a commercial L2 switch having 100base-T. In order to provide an input to the subscriber optical transceiver 120 using such a commercial network switch, it must be converted to 100base-F. The media converter 122 converts 100base-T to 100base-F. The 100base-T output from the network switch 110 is connected to the RJ-45 connector using a UTP cable (Unshielded Twisted Pair Cable) again and converted to 100base-F using the media converter 122 to convert the 100base-T. It is a structure connected to an input to a subscriber optical transceiver by converting it to F. In addition, the second structure is a physical layer device (Phy: Physical) in order to connect the RJ-45 to the subscriber switching device 116 by connecting the RJ-45 using a UTP cable to the signal of the 100base-T output from the network switch 110 (114) is used to provide a Media Independent Interface (MII) as an output. In the transmission system, the first structure and the second structure may be operated simultaneously or separately configured according to the purpose. When configuring a system using a commercial switch having a 100base-T as described above, it is connected to the RJ-45 connector using a UTP cable and connected to the subscriber optical transceivers 118 and 120 through the media converter 122 or the physical layer depending on the purpose. A block with device 114 should be constructed and connected to subscriber optical transceivers 118 and 120 via subscriber switching device 116. In order to provide services to hundreds of subscribers, such a single subscriber distribution network grows in size, which causes a fatal disadvantage in constructing an efficient subscriber distribution network.

As described above, when designing an optical subscriber distribution network for providing broadcasting and communication at the same time when a communication service is to process packet data based on Ethernet, the optical subscriber distribution network should be designed using network equipment. At this time, subscriber optical transceiver, Ethernet signal, and broadcasting signal should be bonded. However, when commercial products are used, the structure becomes complicated and bulky.

Accordingly, an object of the present invention is to provide an apparatus for reducing the size of a subscriber distribution network when designing a subscriber distribution network in a broadcasting communication convergence system.

Another object of the present invention is to provide an apparatus and method for implementing the functions of a network switch, an optical transceiver and a subscriber switching device as a unit in providing an Ethernet signal and a broadcast signal to a subscriber distribution network in a broadcasting communication convergence system. .

The present invention for achieving the above object in the subscriber distribution network of the broadcasting and communication convergence system, Gigabit connection converter for receiving an Ethernet signal, and SERDES (serializer / deserializer) for converting the signal output from the gigabit connection converter to serial data And a switch device connected to the SERDES and having a Serial Media Independent Interface (SMII) / Source Syncronous SMII (SSII) interface, and converting the SMII / SSSMISS interface received from the switch device into a MII (Media Independent Interface) interface. A subscriber switching device that combines an SMII / MII interface, an Ethernet signal output from the SMII / MII interface in a TDM manner with a broadcast signal (MPTS) transmitted from a backplane, and a subscriber receiving data output from the subscriber switching device. An optical transceiver and the subscriber optical transceiver And a physical layer device for outputting a signal output from the switching device.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. In describing the present invention, if it is determined that the detailed description of the related known function or configuration may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted.

The present invention provides a network switch, a subscriber line unit (SLU), and a subscriber switching unit (SSU) for processing an IP (IP over Ethernet) through Ethernet, a communication service, in a subscriber distribution network of a broadcasting communication convergence system. Implement Switching Unit) into one board. Next, a subscriber distribution network implemented with one board will be described with reference to FIG. 2. 2 is a view showing a subscriber distribution device consisting of one board in a broadcasting communication convergence system according to an embodiment of the present invention.

First, the subscriber distribution device 220 includes a switch device 200, a subscriber switching device 214, and a subscriber optical transceiver 212 on one board. The switch device 200 has a 24-port 10 / 100M Serial Media Independent Interface (SMII) / Source Syncronous SMII (SSSMII) interface and also has a 4-port 1G Ten Bit Interface (TBI) interface. Two of them allow stacking of multiple switches. The gigabit connection converter 204 receives the 1G Ethernet signal and is connected to the switch device 200 through the serializer / deserializer (SERDES) 202 through the TBI interface. The switch device 200 outputs a 10 / 100M Ethernet signal to the SMII / SSSMII interface, and the signal is converted into a media independent interface (MII) interface required by the subscriber switching device 214. ). The Ethernet signal output from the SMII / MII interface 208 is combined with the broadcast signal (MPTS) transmitted from the backplane by the subscriber switching device 214 in a TDM manner and transmitted to the subscriber optical transceiver 212.

Meanwhile, the 100_FX signal output from the subscriber optical transceiver 212 is output to the switch device 200 through the unidirectional physical layer device (PHY) 210 to the SMII / SSSMII interface. In this way, several structural units composed of one board can be stacked through the SERDES 202. This is controlled by the main control unit (MCU) to give a smooth MPTS signal to several boards used in this stacking. To enable this, a media access device 209 capable of communicating with the MCU is required. However, since this function requires only one of several boards, as shown in FIG. 2, only necessary boards can use 100Base_Fx, and the remaining boards can use 100Base_Tx.

As described above, the present invention provides a subscriber network by designing a subscriber optical transceiver 212, a network switch 200 having an interface required by a specific module, and a subscriber switching device 214 for processing broadcast signals in one board. Significantly less volume, simpler configuration, and multiple board features in one board reduce redundant devices such as media access and physical layer devices.

As described above, the present invention is required in the subscriber optical transceiver 212 and the specific module in order to prevent the complicated and bulky structure when using commercial products when designing the optical subscriber distribution network using the network equipment. By designing the network switch 200 having an interface and the subscriber switching device 214 for processing broadcast signals in one board, the volume of the subscriber distribution network is significantly reduced and configuration is simplified. In addition, by designing a function consisting of several boards in one board, there is an advantage of reducing the cost of redundant devices by reducing redundant devices such as media access devices and physical layer devices.

1 is a diagram illustrating a subscriber distribution device in a general broadcasting communication convergence system;

2 is a diagram illustrating a subscriber distribution device consisting of one board in a broadcasting communication convergence system according to an embodiment of the present invention.

Claims (3)

In subscriber distribution network of broadcasting communication convergence system, A gigabit converter for receiving Ethernet signals, A serializer / deserializer (SERDES) for converting a signal output from the gigabit converter to serial data; A switch device connected to the SERDES and having a Serial Media Independent Interface (SMII) / Source Syncronous SMII (SSSMII) interface; An SMII / MII interface for converting an SMII / SSSMISS interface received from the switch device into a MII (Media Independent Interface) interface; A subscriber switching device for combining the Ethernet signal output from the SMII / MII interface in a TDM manner together with a broadcast signal (MPTS) transmitted from a backplane; A subscriber optical transceiver for receiving data output from the subscriber switching device; And a physical layer device for outputting a signal output from the subscriber optical transceiver to the switching device. The broadcast communication according to claim 1, wherein the gigabit connection converter, the SERDES, the switch device, the SMII / MII interface, the subscriber switching device, the subscriber optical transceiver, and the physical layer device are configured as one board. Convergence system. The broadcast communication convergence system according to claim 1, further comprising a medium access device for receiving control of a main control device to transmit the broadcast signal.