KR100321258B1 - ADSL router MODEM - Google Patents

Abstract

The present invention provides an ADSL router modem for enabling multiple LAN subscribers to simultaneously access a WAN in a broadband access subscriber system for connecting a local area network (LAN) and a wide area network (WAN). The present invention is intended to enable ATM-based Wide Area Network (WAN) access to home subscribers or remote office subscribers, LAN and WAN through Ethernet and ADSL interfaces. By providing IP routing capabilities between multiple subscribers, multiple subscribers can simultaneously access remote Internet service providers (ISPs) or enterprise networks.

Description

ADSL router MODEM}

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a modem of an asymmetric digital subscriber line (ADSL) system, and more particularly to a home subscriber or a remote office subscriber through a local area network (LAN) through an ethernet interface and an ADLS interface. The present invention relates to an ADSL router modem that provides high-speed Internet service by simultaneously providing multiple subscribers to a single modem by providing an IP routing function between a network and a wide area network (WAN).

Figure 1 shows a conventional ADSL modem block configuration.

As shown, a filter / line driver 2 for matching data transmitted from a Digital Subscriber Line Asynchronous Modem (DSLAM) to a filtered and twisted pair; Digitally converts analog data transmitted from the filter / line driver 2 to the Discrete Multi-Tone (DMT) processor 4 and receives digital data through the parallel port transmitted from the DMT processor 4. An analog front end (AFE) 3 for performing an analog conversion and then transmitting to the filter / line driver 2; A DMT processor 4 for demodulating the input / output data of the ADSL modem; A framer 5 for generating received data into an ADSL frame and transmitting the received data to the DMT processor 4; A Cell Delineation Block (CDB) 6 for converting an ADSL frame from the framer 5 into an ATM cell; A Digital Signaling Processor (DSP) processor (7) which detects overhead state information when transmitting and receiving data between the DSLAM and the ADSL modem; A main processor (8) which controls to receive the ADSL frame from the DSLAM side through a UTOPIA interface and transmit it to one Ethernet subscriber; An Ethernet driver 12 for matching data from the main processor 8 to Ethernet; A transformer 13 converts a signal transmitted from the Ethernet driver 12 to a setting level and transmits the signal to a subscriber station through an RJ-45 port.

ADSL-based conventional ADSL modem having the Ethernet interface as described above is implemented so that one subscriber can be connected to a remote ISP. This was inefficient in terms of cost and space when small offices or multiple subscriber accesses were required.

Therefore, the present invention has been proposed to solve the above conventional problems, the object of the present invention is

It provides ATM-based Wide Area Network (WAN) access to home or remote office subscribers and provides IP routing between LAN and WAN through Ethernet and ADSL interfaces. This provides an ADSL router modem that allows multiple subscribers to simultaneously access a remote ISP (Internet Service Provider) or enterprise network.

ADSL router modem according to the present invention to achieve the above object,

A filter / line driver for filtering data transmitted from the DSLAM to a filtered and twisted pair through an RJ-11 port, which is an ADSL matching connector;

An AFE that digitally converts analog data transmitted from the filter / line driver and transmits it to a DMT processor, receives digital data through a parallel port transmitted from the DMT processor, performs analog conversion, and then transmits the analog data to the filter / line driver. (Analog Front End; analog front end);

A DMT processor for allocating and demodulating data per channel to input / output data;

A framer for UTOPIA matching ADSL-based ATM data from the DMT processor, converting an ATM cell into an ADSL frame, and transmitting the ADSL frame to the DMT processor;

A DSP processor detecting overhead state information during data transmission and reception between the DSLAM and the ADSL router modem;

A main processor for IP routing the ADSL frame transmitted from the framer to the corresponding Ethernet subscriber;

A plurality of Ethernet drivers for respectively matching corresponding data routed from the main processor to Ethernet;

In one-to-one correspondence with the Ethernet driver, the technical configuration is characterized by consisting of a plurality of transformers to convert the signal transmitted from the Ethernet driver to a setting level to transmit to the subscriber terminal through the RJ-45 port.

1 is a conventional DSL modem block diagram;

2 is a block diagram of an ADSL router modem block according to the present invention;

Figure 3 is an ADSL router modem protocol stack applied to the present invention.

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

100: RJ-11 105: Filter / Line Driver

110: AFE 115: DMT Processor

120: framer 125: DSP processor

130: main processor 135: EEPROM

136: Flash ROM 137: DRAM

140 ~ 140 + n: Ethernet Driver 150 ~ 150 + n: Transformer

160 ~ 160 + n: RJ-45

Hereinafter, the ADSL router modem according to the present invention as described above in detail based on the accompanying drawings as follows.

The present invention implements to allow multiple subscribers to be connected to a single ADSL modem simultaneously to a remote ISP by routing an IP packet according to an IP (Internet Protocol) address in an ADSL-based ADSL modem having an Ethernet interface.

The ADSL router modem according to the present invention is used when two separate Local Area Network (LAN) or Wide Area Network (WAN) are connected to each other.

It is a tens-hundreds of times higher speed than the existing modems because it guarantees the transmission speed of 10Mbps downlink and 1Mbps upstream by connecting voice and data service at high speed by using the existing telephone line. It becomes possible.

2 is a block diagram of an ADSL router modem block according to the present invention.

As shown, a filter / line driver 105 for matching data transmitted from the DSLAM to the filtered and twisted pair through the RJ-11 port 100, which is an ADSL matching connector; After converting the analog data transmitted from the filter / line driver 105 to digital DMT processor 115, and receiving the digital data through the parallel port transmitted from the DMT processor 115 performs an analog conversion An analog front end (AFE) 110 for transmitting to the filter / line driver 105; A DMT processor 115 for assigning and demodulating data per channel to input / output data; A framer (120) for UTOPIA matching ADSL-based ATM data from the DMT processor (115), converting an ATM cell into an ADSL frame, and transmitting the ADSL frame to the DMT processor (115); A DSP processor (125) which detects overhead state information when transmitting and receiving data between the DSLAM and the ADSL router modem; A main processor (130) for IP-routing the ADSL frame transmitted from the framer (120) to the Ethernet subscriber side; A plurality of Ethernet drivers 125 to 125 + n for respectively matching corresponding data routed by the main processor 130 to Ethernet; One-to-one correspondence with the Ethernet drivers 125 to 125 + n, and a plurality of transformers (150 to 150 + n) for converting a signal transmitted from the Ethernet driver to a setting level and transmitting the signal to a subscriber station through the corresponding RJ-45 port. It consists of.

Referring to the operation of the ADSL router modem according to the present invention as follows.

Figure 3 shows an ADSL router modem protocol stack in accordance with the present invention. That is, the protocol elements used on the WAN side include physical layer, ADSL, ATM Adaptation Layer 5 type (AAL5), Point-to-Point Protocol (PPP), IP on it, and User Data Protocol (UDP), which is a routing protocol thereon. It consists of Trivial File Transfer Protocol (TFTP), Routing Information Protocol (RIP), and Simple Network Management Protocol (SNMP). The protocol element used on the LAN side is composed of physical layer, ethernet, IP on it, TCP on the routing protocol, and TELNET. Thus, the ADSL router modem according to the present invention performs a function of routing data between a LAN and a WAN.

When data is transmitted from the WAN to the LAN, that is, when data is transmitted from the ADSL network access device (DSLAM) to the Ethernet subscriber, the filter / line driver 105 is a connector for ADSL matching. Received through the RJ-11 port 100, performs filtering. The AFE 110 then digitally converts the filtered analog data filtered by the filter / line driver 105 to the DMT processor 115, and the DMT processor 115 assigns and demodulates data per channel to the digitally converted data. do. The DMT processor 115 performs Quadrature Amplitude Modulation (QAM) encoding / decoding, tone ordering, and the like.

The framer 120 UTOPIA matches ADSL-based ATM data from the DMT processor 115. The DSP processor 125 has an internal memory and is used for the main processor 130 and operation, training, and interface. It performs the function of detecting overhead status information when sending / receiving data between DSLAM and ADSL router modem, and the overall function of booting, initialization, error status information with external host processor.

The main processor 130 includes a 32-bit address bus and a data bus and supports communication protocols such as Ethernet / IEEE 802.3 CS / CDMA, High-level Data Link Control (HDLC), and Universal Asynchronous Receiver Transmitter (UART). In addition, the main processor 130 supports the TCP / UDP application program due to the TCP / UDP protocol function, and enables network management and IP routing due to the SNMP and RIP protocol functions.

Thus, the main processor 130 determines the optimal path according to the routing address table of the ATM cell transmitted from the framer 120 and performs IP routing to the corresponding Ethernet driver. The routing table lists the remote address along with detailed routes and costs. Among many Ethernet drivers, ATM cells sent to the corresponding Ethernet driver are sent to the corresponding Ethernet subscriber through the corresponding transformer, RJ-45 port. This routing increases network capacity and security.

Therefore, when ADSL data is transmitted from DSLAM to many Ethernet subscribers connected to the multiport ADSL router modem, the main processor 130 routes the ADSL data to the corresponding Ethernet subscriber.

In addition, when the Ethernet subscriber transmits data to the DSLAM, since the DSLAM performs a reverse function when transmitting data to the Ethernet subscriber, the description thereof is omitted.

Multi-port ADSL Router MODEM provides IP routing function between local area network and wide area network through ethernet interface and ADSL interface, allowing multiple Ethernet subscribers to connect to WAN and transmit data at the same time.

The multi-port ADSL router modem according to the present invention is a device that enables access to an ATM-based network, and is mainly suitable for use by general users, small office home offices (SOHO), and branch offices of a company.

As described above, the ADSL router modem of the present invention provides an IP routing function between a LAN and a WAN through an Ethernet interface and an ADSL interface, such that a plurality of subscribers simultaneously access a remote Internet service provider (ISP) or an enterprise. It has the effect of being able to access the network.

Claims (1)

In ADSL modem for connecting LAN and WAN, A filter / line driver for filtering data transmitted from the DSLAM to a filtered and twisted pair through an RJ-11 port, which is an ADSL matching connector; An AFE that digitally converts analog data transmitted from the filter / line driver and transmits it to a DMT processor, receives digital data through a parallel port transmitted from the DMT processor, performs analog conversion, and then transmits the analog data to the filter / line driver. (Analog Front End; analog front end); A DMT processor for allocating and demodulating data per channel to input / output data; A framer for UTOPIA matching ADSL-based ATM data from the DMT processor, converting an ATM cell into an ADSL frame, and transmitting the ADSL frame to the DMT processor; A DSP processor detecting overhead state information during data transmission and reception between the DSLAM and the ADSL router modem; A main processor for IP routing the ADSL frame transmitted from the framer to the corresponding Ethernet subscriber; A plurality of Ethernet drivers for respectively matching corresponding data routed from the main processor to Ethernet; The one-to-one correspondence with the Ethernet driver, ADSL router modem, characterized in that consisting of a plurality of transformers to convert the signal transmitted from the Ethernet driver to a set level and transmit to the subscriber terminal through the RJ-45 port.