KR100483547B1 - Apparatus for coupling Asynchrous system and Remote system - Google Patents

Abstract

The present invention relates to an apparatus for enabling a remote system connected to a LAN / WAN to be used as a system by interworking with a central ATM private switching system via Ethernet.

The ATM private switching system may be equipped with a main node and interwork with a near / long distance remote node through an Ethernet. The main node of the ATM switching system may include a central processor module that is responsible for operation and maintenance in the system; A subscriber module for converting PCM voice into an ATM cell at a main node for service use by a subscriber connected to an interworking device; An ATM switch module for switching the ATM cell converted by the subscriber module in a system to a destination; At least an interworking module for receiving an cell from the subscriber module or the ATM switch module and for implementing an interface for connecting with a first interface or a second interface.

Therefore, the present invention can be used as a single system by interworking a remote system connected to a LAN / WAN through a central ATM private switching system through Ethernet, thereby increasing the system capacity.

Description

Apparatus for coupling Asynchrous system and Remote system

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a remote system interworking apparatus of an ATM mode private exchange over a short range network (hereinafter referred to as a LAN) or a long area network (hereinafter referred to as a WAN), in particular connected to a LAN / WAN. The present invention relates to a device that enables a remote system to be used as a single system by interworking with an Asynchronous Transfer Mode (hereinafter referred to as ATM) private switching system via Ethernet.

 1 is a diagram of a conventional network, which is connected to a public switch telephone network (PSTN) 100 through a V5.2 interface (up to DS1E (2.048 Mbps, 16 Link) to interwork two systems 10 and 20.

Referring to FIG. 1, in the conventional network interworking, Q.SIG is used to use two systems 10 and 20 connected to the PSTN 100 as one system.

As such, in the related art, two systems 10 and 20 need to support a physical interface and a protocol to interwork through the PSTN 100. The physical interface can accommodate up to 16 DS1E links for the V5.2 protocol. In addition, in order to perform various control functions for the remote subscriber, the access network defined as Local Exchange (hereinafter referred to as LE) of the PSTN and the first and second systems 10 and 20 (hereinafter referred to as AN). ) Follow the standardized communication protocols (ITU-T, G.764, G.765, ETSI ETS 300-324-1, 347-1). The V5.2 protocol consists of system startup procedures, National PSTN protocol procedures, control protocol procedures, BCC protocol procedures, link control protocol procedures, and protection protocol procedures, and defines procedural and protocol requirements for the V5.2 interface. It supports analog telephone access, ISDN Basic Access (hereinafter referred to as ISDN-BA), ISDN Primary Rate Access (hereinafter referred to as ISDN-PRA), and other analog or digital leased line access. System operation and configuration management between LE (100) and AN (10, 20) of the PSTN is done through Q.SIG. As described above, in the conventional network interworking, the subscribers of the first system 10 and the second system 20 through the interface and the protocol, the on-demand service which is a service provided by V5.2, that is, PSTN, ISDN-BA, ISDN-PRA service, Permanent line capability, Permanent leased line service through the same system.

As such, the conventional network interworking structure uses the V5.2 protocol to interwork two systems. However, the conventional network interworking structure has a disadvantage that it is not physically usable on the Internet with 2.048Mbps, 16 links, which is basically a band limitation of the V5.2 protocol.

Accordingly, an object of the present invention is to provide a remote system interworking apparatus of an ATM private exchange via LAN / WAN that can be used as a single system by interworking a remote system connected to the LAN / WAN via an ATM private exchange system through Ethernet. have.

In order to achieve the above object, the present invention provides a remote ATM system connected to a LAN or a WAN and a central ATM switching system in which a central main node is mounted, connected to a LAN and a GbE / 10BT / 100BT, and a router according to a WAN and a UTP5 / SONET scheme. Characterized in that connected through.

Therefore, the present invention provides a subscriber station for converting PCM voice into ATM cell in the central processor module and main node in charge of the operation and maintenance of the system in the main node that is connected to the remote system connected to the remote system connected by LAN or WAN. At least an interworking module for connecting the GbE / 10BT / 100BT Ethernet with the ATM switch for switching the module and the ATM cell in the system.

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

2 is a network interworking diagram according to the present invention, which is connected to a remote ATM system connected to a LAN 1 or a WAN 2 and a central ATM private exchange system 200 mounted with a central main node.

In more detail, the central ATM private switching system 200 implements a main node 300, and each of the LANs through an IWM (inter working module) 340 included in the main node 300. 1) and a short distance remote node 7 (hereinafter referred to as a first interface) connected with a GbE / 10BT / 100BT, and a long distance remote node connected according to a WAN (2) and a UTP5 / SONET method through a router (3). 8) (hereinafter referred to as a second interface) has a network configuration.

In particular, the main node 300 mounted in the ATM private switching system 200 will be described in more detail as follows.

3 is a configuration diagram of a main node 300 according to an exemplary embodiment of the present invention, and includes a central processor module (CPM) 310, a line subscriber module (LSM) 320, a central switch module (330), and an IWM (Inter). Working Module (340).

Referring to FIG. 3, the main node 300 converts the CPM 310, which is in charge of operation and maintenance (OAM), and 64 Kbps of PCM voice into an ATM cell (non-standard ATM cell). LSM 320 and the CSM 330 for switching the ATM cells in the system and the IWM 340 for connecting 10BT / 100BT or Gigabit Ethernet. In addition, the CSM 330 is connected to each block by UTP5 or Optical Link of 155Mbps.

4 is a detailed configuration diagram of an LSM according to an exemplary embodiment of the present invention, which includes a DTMF receiver 321, a controller 322, a bus controller 323, a clock generator 324, a SAR 325, and a UTOPIA interface 326. ), A cell switch 327, and a redundancy control unit 328.

Referring to FIG. 4, when the subscribers connected to the ATM private exchange 200 call their counterparts by pressing the terminal, the LSM 320 recognizes a dual tone multifrequency (DTMF) digit and calls which subscriber. DTMF receiver 321 for analyzing the data, 64Kbps PCM voice data received from the subscriber connected to the cell switch unit 327 for converting and transmitting the 53-byte ATM cell, ATM transmitted from the cell switch unit 327 In order to transmit the cell to the CSM of the main node 300 is basically configured to include a UTOPIA interface unit 326 that is responsible for the interface with the 155Mbps UTP or optical link.

In addition, the controller 322 for controlling the entire functional block configured in the LSM 320, the clock generator 324 for data synchronization, and the bus controller for communication with the other boards of the ATM private exchange 200 323 and a SAR 325 for converting a message from the CPU into an ATM cell for transmission to the outside and transmitting the message to the UTOPIA interface unit 326.

5 is a configuration diagram of an IWM according to an exemplary embodiment of the present invention, wherein the CPU 341, the ROM 342, the RAM 342, the packet and ATM cell generator 344, the Gigabit Ethernet controller 345, and the first are shown. A transceiver 345a, a 10BT / 100BT Ethernet controller 346, a second transmitter 346a, an ATM cell buffer 347, an ATM SONET framer 348, and a third transmitter 348a.

Referring to FIG. 5, the IWM 340 may include a CPU 341 for controlling an entire block, a gigabit Ethernet controller 345 for providing a gigabit Ethernet interface, and a 10BT / 100BT Ethernet controller for providing a 10BT / 100BT Ethernet interface. 346, a packet and ATM cell generator 344 for converting an ATM cell into a message form for processing with the CPU 341, or a packet form for transmitting and receiving via Ethernet, and the LSM 320; Or an ATM cell buffer 347 for receiving a cell from a UTP5 / Optic module, which is a physical interface unit for receiving an ATM cell from the CSM 330, and an ATM sonnet framer 348. 345 and 10BT / 100BT Ethernet controller 346 and ATM sonnet framer 348 are respectively connected to the transceiver to transmit and receive packets or ATM cells.

Referring to Figures 2 to 5 will be described the operation of the remote system interworking apparatus of the ATM private exchange over LAN / WAN according to the present invention.

Referring to FIG. 2, the structure of an ATM private exchange includes a main node (N1) having an ATM switch and an extended node connected thereto. At this time, when the expansion node is connected in the system centered on the main node or in the same building, UTP5 or Sonnet is used.

However, when the expansion node is installed in another building or another area and operated remotely, it is difficult to connect directly to UTP5 or Sonnet. Therefore, in this case, the present invention implements to operate the system by connecting to a LAN / WAN environment through an Ethernet interface as nodes N4 and Nn are connected.

The IWMs of the main nodes are connected to the local remote node through the first interface and the remote remote node through the second interface, respectively.

Looking at the principle of operation and the operation of each block according to the present invention, the LSM of the main node (N1) is the main node as shown in Figure 4 when the subscriber calls the subscriber of the nodes (N4, Nn) that is a remote node The LSM 320 of N1 analyzes the subscriber's digit information through the DTMF receiver 321. In addition, the LSM 320 may know that the subscriber of the remote nodes N4 and Nn is called through the analyzed information, and the controller 322 transmits the ATM cellized call message through the UTOPIA interface 326. To control.

Meanwhile, the CSM 330 having the ATM switch analyzes the ATM header and switches the ATM cell to the IWM 340.

The IWM then turns the received ATM cell into an IP packet and sends the message to the IWM of the remote node via Ethernet. Here, IWM basically performs LAN emulation function of ATM, but it is designed to operate independently in this system for system interworking rather than standardized LAN emulation function. That is, when an ATM cell is input, a packet is transmitted one-to-one to a fixed destination IP, and an ATM header and a payload are inserted into a data area as it is.

Referring to FIG. 5, an ATM cell input via a third transmitter / receiver 348a, which is a UTP5 or an optical transmitter, and an ATM primer 348 is temporarily stored in the ATM cell buffer 347, and the packet generator 344 After making the stored ATM cell into the packet to which the designated destination IP is already assigned, the packet is transmitted to the other side through the transceivers 345a and 346a through the Ethernet controllers 345 and 346.

The IWM 340 mounted at the remote nodes N4 and Nn converts packet data received through the Ethernet controllers 345 and 346 into ATM cells by separating the IP header into ATM cells in the opposite operation. ) To the LSM 320.

Then, the LSM 320 transmits the received ATM cell to the control unit 322 through the SAR 325 when the received ATM cell is the message cell, and transmits the converted cell to the voice PCM by transmitting the cell switch 327 to the subscriber. do. In this case, when the message is a call message, the message is transmitted to the control unit 322 via the SAR 325 to call the corresponding subscriber.

As described above, the present invention can be used as a single system by interworking a remote system connected to a LAN / WAN through a central ATM private switching system through Ethernet, thereby increasing the system capacity. In addition, the present invention provides a wider bandwidth than the interworking by the Q.SIG of the conventional PSTN, thereby enabling a large capacity interworking and high-speed service implementation.

1 is a view showing a conventional network interworking.

2 is a diagram illustrating network interworking according to the present invention;

3 is a configuration diagram of a main node according to an embodiment of the present invention.

4 is a structural diagram of an LSM according to an embodiment of the present invention.

5 is a structural diagram of an IWM according to an embodiment of the present invention.

Claims (12)

In the remote system including at least one interface means connected to the LAN and WAN to operate in conjunction with the ATM system via Ethernet, the mainboard of the ATM system, A central processor module responsible for operation and maintenance inside the system; A subscriber module for converting PCM voice into an ATM cell at a main node for service use by a subscriber connected to an interworking device; An ATM switch module for switching the ATM cell converted by the subscriber module in a system to a destination; And And an interworking module for implementing an interface for receiving a cell from at least one of the subscriber module and the ATM switch module, and for connecting to the interface means. The method of claim 1, The first interface of the interface that is connected to the short distance remote node in the ATM system in which the main node is mounted is a network connected to the ATM private central exchange via a node located at a short distance and one or more Ethernet of LAN, GbE, 10BT, and 100BT. Interworking device between an asynchronous system and a remote system, characterized in that the interface of the. The method of claim 1, A second interface among the interfaces connected to the remote remote node in the ATM system represents an interface connected to the ATM central private exchange through a router according to one or more methods of a remote node and a WAN, UTP5, and SONET. Interworking device between an asynchronous system and a remote system. The method of claim 1, wherein the subscriber module, A DTMF receiver for recognizing DTMF digits entered by the subscriber; An ATM cell switch for converting PCM voice input from the subscriber into an ATM cell and transmitting the same; A UTOPIA interface unit for transmitting an ATM cell transmitted from the ATM cell switch to a cell switching module; And And a control unit for controlling the respective blocks. The method of claim 1, wherein the interworking module, An ATM cell processing unit providing an interface for receiving an ATM cell from an ATM switch or a subscriber module in the main node; A packet / ATM cell generator for converting the received ATM cell into a message or packet according to a destination of the ATM cell; A 10BT / 100BT Ethernet controller for transmitting a packet transmitted from the packet / ATM cell generator through 10BT / 100BT Ethernet; A gigabit ethernet controller for transmitting a packet transmitted from the packet / ATM cell generator through gigabit ethernet; And Interface unit of the central processing unit for controlling the respective components; interworking device between an asynchronous system and a remote system comprising a. The method of claim 1, wherein the switch module, Interworking device between the asynchronous system and the remote system, characterized in that for switching the ATM cell to the interworking module by analyzing the ATM header. The method of claim 1 or 5, wherein the interworking module, In the case of the main node, the interworking device between the asynchronous system and the remote system, characterized in that the received ATM cell to make an IP packet to transmit to the remote node via Ethernet. The method of claim 1 or 5, wherein the interworking module, An interworking device between an asynchronous system and a remote system, wherein when an ATM cell is input, a packet is transmitted one-to-one to a fixed destination IP, and an ATM header and a payload are inserted into a data area as it is. The method of claim 1 or 5, wherein the interworking module, Interworking device between the asynchronous system and the remote system, characterized in that the IP header is separated from the packet data received through the Ethernet controller to be converted to an ATM cell and transmitted to the subscriber module through the ATM framer when mounted in a remote node . The method of claim 9, wherein the subscriber module, In addition, by configuring a SAR for converting the ATM cell received in the form of a message to the control unit, If the received ATM cell is a message cell, and transmits to the control unit via SAR, The interworking device between the asynchronous system and the remote system, characterized in that for the voice cell, the cell switch converts the received ATM cell into a voice PCM and transmits it to the subscriber. The method of claim 10, And when the message is a call message, transmits the call to the controller via the SAR to call the corresponding subscriber. delete