KR20010103459A - Dslam system with ip router function - Google Patents

Abstract

The present invention relates to a DSLAM system having an IP router function that can be applied to an xDSL subscriber access device and an access device supporting broadband communication services such as Fiber To The Curb (FTTC) and Fiber Loop Carrier (FLC). By integrating the IP router and DSLAM among the network components that are configured to provide data communication services, it is possible to reduce costs and provide efficiency and flexibility of network configuration.

The present invention provides the efficiency and economics of network configuration by providing the IP router function in the DSLAM, and can provide the IP router function in the control management board of the DSLAM by hardware configuration and software configuration. By providing 155Mbps optical access and 100BaseT high speed Ethernet access, it provides flexibility in network configuration to support efficient network configuration according to subscriber demand and network bandwidth capacity and interface.

Description

DS system with IP router function {DSLAM SYSTEM WITH IP ROUTER FUNCTION}

The present invention relates to a DSLAM system having an IP router function applicable to an xDSL subscriber access device and an access device supporting broadband communication services such as FTTC (Fiber To The Curb) and FLL (FiberLoop Carrier). By integrating the IP router and DSLAM among the network components that are configured to provide data and communication services, it is possible to reduce costs and provide efficiency and flexibility of network configuration.

Recently, ADSL system that can provide broadband (downward 8Mbps or less, upward 800kbps) data service using existing telephone line without installing new subscriber line has been spotlighted in internet service.

In general, DSLAM system has a simple ATM multiplexer / demultiplexer function and connects data inputted from subscriber board through subscriber xDSL port to 155Mbps OC-3 optical port or 45Mbps DS3 port of uplink board. Pass data to the router.

Conversely, the downlink data input to the 155Mbps OC-3 optical port or 45Mbps DS3 port of the uplink board from the router of the ISP or the Internet network is distributed to the xDSL port of the subscriber board. Has the function to perform management

Such a conventional DSLAM simply transmits the ATM cell downward or upward transparently, does not perform a communication protocol for the data path, and the capacity expansion supporting multiple subscriber ports in the system configuration is an important point in economic terms. do.

Therefore, such a conventional configuration has a drawback of lowering system economics and efficiency by separately configuring expensive routers and DSLAMs regardless of the bandwidth provided by the subscriber and the service network.

SUMMARY OF THE INVENTION The present invention has been made to solve such a conventional problem, and an object of the present invention is to configure an IP router function in a DSLAM by configuring a hardware and software structure to provide an IP router function in a control management board of the DSLAM. To provide a DSLAM system with an IP router function that can improve the efficiency and economics of network configuration by providing.

Another object of the present invention is to provide network and ISP side ATM based 155Mbps optical connection and at the same time provide 100 base T Fast Ethernet connection to provide flexibility of network configuration and to meet subscriber demand and network bandwidth capacity and interface. It is to provide DSLAM system with IP router function to support efficient network configuration.

1 is a block diagram showing the relationship between the DSLAM control management and network connection board of the present invention

Figure 2 is a block diagram showing the software functions of the control management and network connection board of the present invention

<Explanation of symbols for main parts of drawing>

1: cell bus 2: cell bus interface device

3: Microprocessor 4: 100 Mbps Ethernet Driver

5: Connector 6: Control Bus

7: SRAM 8: DRAM

9: fresh 10: 155 Mbps ATM physical device

11: optical module

In order to achieve the above object, the present invention provides a cell bus interface device which is connected to a cell bus and provides an interface with a cell bus having a function of managing header extraction, insertion, and routing table of an ATM cell, and the cell bus interface device. An integrated microprocessor supporting system speeds of 200 MHz or higher and a 155 Mbps SAR capability, supporting 100 Mbps / 10 Mbps Ethernet connectivity, a 100 Mbps Ethernet driver connected to the output of the microprocessor, and the microprocessor and cell bus interface A storage means for storing data through a control bus connected to a device and an Ethernet driver, and between the cell bus interface device and the microprocessor via a utopia level 2 interface to form a 155 Mbps OC-3 frame or to establish an ATM cell therefrom. extraction It is characterized in that it comprises at 155Mbps ATM physical device that performs the function.

Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

1 is a block diagram of the present invention, a cell bus that is connected between a cell bus 1 and a microprocessor 3 and provides an interface with a cell bus having a function of managing header extraction, insertion, and routing table of an ATM cell. An interface device (2), an integrated microprocessor (3) supporting a 100 Mbps / 10 Mbps Ethernet connection with a system speed of 200 MHz or higher and a 155 Mbps SAR function, and an output and connector (5) of the microprocessor (3) SRAM (7), DRAM (8), and Flash (9), which store data by being connected via a 100 Mbps Ethernet driver (4) connected between them, and a control bus (6) connected to the cell bus interface device (2). And connect between the cell bus interface device 2 and the microprocessor 3 via a utopia level 2 interface to form a 155 Mbps OC-3 frame or to extract an ATM cell therefrom. It is configured to include an optical module (11) connected between 155Mbps ATM physical device 10 and the 155Mbps ATM physical device 10 and the light Ke connector 12. The

2 is a block diagram showing the functions of the software executed by the microprocessor 3 of the present invention. The IP router function performing unit 40 performs an IP router function from data input from a 100 Mbps LAN driver and an ATM SAR driver. The system control unit 30 performs control control of the system.

In addition, the IP router function execution unit 40 is connected to the SNMP, TFTP, Telnet, DHCP server, DNS connected to the socket and connects their signals, OSPF, RIP V1, V2, UDP, IGMP to the socket It is configured to perform the software function by connecting the TCP, the link support layer, the 100BaseT LAN driver, and the SAR driver to the IP router.

In the figure, reference numeral 30 denotes a system control management unit.

Referring to the operation of the present invention configured as described above is as follows.

FIG. 1 shows a hardware configuration of a board that performs a control function and a network access function for providing a router function and a 155 Mbps optical connection and a 100 Mbps Ethernet connection as a network interface in a DSLAM, wherein the data communication base is ATM based, and the ATM The router of the cell is performed based on the cell bus.

In FIG. 1, the cell bus interface device 2 provides an interface with a cell bus with functions of managing header extraction, insertion, and routing tables of ATM cells.

The microprocessor (3) used on this board is an integrated microprocessor that supports 100Mbps / 10Mbps Ethernet connectivity with system speeds above 200MHz and SAR capabilities of 155Mbps, such as Motorola's MPC8260.

In addition, the 155 Mbps ATM physical device 10 forms a 155 Mbps OC-3 frame or extracts an ATM cell therefrom.

ATM cell transfer between the cell bus interface device 2 and the microprocessor 3 SAR, 155 Mbps ATM physical device 10 is via a utopia level 2 interface.

2 is a diagram illustrating a software function structure performed by a microprocessor, and the configuration of the IP router function performing unit 40 and a system performing an IP router function from data input from a 100 Mbps LAN driver and an ATM SAR driver are shown. It may be divided into a system control unit 30 that performs control management.

First, the system controller 30 performs control of the 155 Mbps ATM physical device 10, control of the cell bus interface device 2, system resource management, network signal processing, and traffic control management.

In addition, the IP router function performing unit 40 performs the OSPF or RIP v1, v2, etc. necessary for extracting or forming an IP packet from the ATM cell and IP routing, and performs functions such as ARP and NAT for IP address processing. It connects with the higher application protocol through the socket interface.

ADSL subscriber boards can have board scalability and board independence, allowing the internal microprocessor to control each xDSL and transceiver.

Likewise, communication with the management control board is carried over the cell bus on an ATM cell basis.

The present invention as described above can provide the efficiency and economics of network configuration by providing the IP router function in the DSLAM, and can provide the IP router function in the control management board of the DSLAM.

In addition, it provides ATM-based 155Mbps optical access to the network and ISP, and provides 100BaseT high-speed Ethernet connection to provide flexibility in network configuration, enabling efficient network configuration according to subscriber demand and network bandwidth capacity and interface. There is.

Claims (1)

A cell bus interface device connected to the cell bus and providing an interface with the cell bus with functions of managing header extraction, insertion, and routing tables of the ATM cell; An integrated microprocessor connected to the cell bus interface device supporting a 100Mbps / 10Mbps Ethernet connection while providing a system speed of 200MHz or higher and a SAR function of 155Mbps; A 100 Mbps Ethernet driver connected to the output of the microprocessor, Storage means for storing data via a control bus connected to the microprocessor and cell bus interface device and an Ethernet driver; An IP comprising a 155 Mbps ATM physical device connected between the cell bus interface device and a microprocessor through a utopia level 2 interface to form a 155 Mbps OC-3 frame or to extract an ATM cell therefrom. DSL system with router function.