KR19980013894A - Network interworking between frame relay and asynchronous delivery method - Google Patents

Abstract

The present invention relates to a network interworking apparatus for a frame relay and an ATM, and more particularly, to a network interworking apparatus for a frame relay and an ATM, and more particularly, to a high- The present invention relates to a network interworking device between a frame relay and an ATM for performing an interworking function so as to communicate with each other through a multi-point interconnection.

It is an object of the present invention to provide an ATM matching function and a frame relay matching function for connecting a frame relay terminal or a private frame relay communication network through an ATM communication network and to provide a network interworking according to the standard of the International Telecommunication Union A frame relay and an ATM network that performs an FR-SSCS function using an AAL5 in SSCS and performs a function of interconnecting a plurality of frame relay terminals or private frame relay networks by using a plurality of virtual connection establishment capabilities of an ATM communication network The purpose of providing interlocking devices

have.

In order to achieve the above object, the present invention provides an ATM switching system, comprising: an ATM matching unit for connecting to an ATM switch and processing an ATM cell; a frame relay matching unit for connecting a frame relay frame and a connection to a private frame relay network or a frame relay terminal; System data storage, and operation terminal matching function.

Description

Network interworking between frame relay and asynchronous delivery method

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing the structure and connection relationship of a network interworking device between a frame relay and an asynchronous transfer mode (ATM)

FIG. 2 is a block diagram showing a configuration of a protocol to be processed by a network interworking device between a frame relay and an ATM and a data flow relationship according to the present invention;

FIG. 3A is an interlocking configuration diagram of a private frame relay network through an asynchronous ATM network according to an exemplary embodiment of the present invention;

FIG. 3B is a diagram illustrating an interworking relationship between a private frame relay network and a broadband frame relay terminal according to an exemplary embodiment of the present invention;

FIG. 3C is an interlocking configuration of frame relay terminals according to an embodiment of the present invention;

FIG. 3 is a diagram illustrating an interworking relationship between a frame relay terminal and a private frame relay network according to an embodiment of the present invention;

FIG. 3E is a configuration diagram of interworking between a frame relay terminal and a broadband frame relay terminal according to an embodiment of the present invention;

Description of the Related Art [0002]

100: Network interworking between frame relay and ATM

110: Asynchronous Transfer Mode (ATM)

111: Physical layer matching unit

112: ATM layer processor

113: AAL processing section

114: Control memory

115:

120: Frame relay matching section

121: Frame relay control unit

130:

131: a central processing unit (CPU)

132: EPROM (Erasable Programmable ROM)

133: System memory

134: Backup memory

135: Timer and operation terminal matching unit

201: Operation terminal

AAL: ATM Adaptation Layer

FR-SSCS: Frame Relay Service Specific Receiver Frame (Frame

Re1aying Service Specific Convergence Sublayer)

CPCS: Common Part Convergence

Sublayer)

PHY: Physical Layer Protocol < RTI ID = 0.0 >

UTP: Unshielded Twisted Pair

PVC: Permanent Virtual Connection

The present invention relates to a network interworking device between a frame relay and an asynchronous transfer mode (hereinafter, referred to as ATM), and more particularly, to a network interworking device for a high-speed cell-unit transmission capability of an ATM communication network for a high- Network interworking between Frame Relay and ATM for performing interworking function for multi-point interconnection of existing frame relay terminals or private Frame Relay communication networks using a frame relay protocol using a plurality of virtual circuit setting capabilities ≪ / RTI >

The ATM network is recognized as a next generation public and private communication network in accordance with the recent rapid technological development and various service demands. The ATM communication network is a communication network for high speed data communication due to high transmission speed, reliability, Is expected to catch up.

Accordingly, it is an object of the present invention to provide an ATM matching function and a frame queue matching function for interconnecting a plurality of frame relay terminals or a private frame relay communication network through an ATM communication network, 5 is used as an ATM Adaptation Layer (AAL) 5 in order to provide a Service Specific Convergence Sublayer (SSCS) and a Frame Relaying Service Specific Convergence (Hereinafter referred to as " FR-SSCS ") function, and a frame for performing an interconnection function of a multi-point frame relay terminal or a private frame relay network using a plurality of virtual connection The purpose is to provide a network interworking device between relay and ATM.

In order to accomplish the above object, the present invention provides an ATM switching system, comprising: an ATM matching unit for connecting to an ATM switch and processing an ATM cell; a frame relay matching unit for connecting a frame relay terminal with a private frame relay network, System control, system data storage, and operation terminal matching function.

BRIEF DESCRIPTION OF THE DRAWINGS The above and other objects, features, and advantages will become more apparent from the following detailed description taken in conjunction with the accompanying drawings. Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a block diagram of a network interworking apparatus 100 between a frame relay and an ATM to which the present invention is applied. The ATM interworking apparatus 100 includes an ATM matching unit 110 for performing connection with an ATM switch, ATM cells, and AAL5 packet transmission / A frame relay matching unit 120 for performing a connection to a physical interface and a frame relay frame transmission / reception function, and a system control unit 130 for performing system control, system data storage, operation terminal registration, and system operation management functions.

As shown in FIG. 1, the network interworking device between the frame relay and the ATM according to the present invention is connected to the ATM switch through the ATM matching unit 110, It is constructed by connecting with a private frame relay network.

The ATM matching unit 110 includes a physical layer (DS1E, 25.6 Mbps UTP or DS3) matching unit 111, an ATM layer processing unit 112, an AAL processing unit 113, a control memory 114, A packet memory 115 and the like and is connected to the ATM switch through the physical layer matching unit 111. The ATM cell is mapped to the payload of the physical layer frame and the ATM cell is processed through the ATM layer processing unit 112 The AAL processing unit 113 divides the frame relay frame into ATM cells and reassembles the ATM cells into frame relay frames. The function of the AAL processing unit 113 is performed by the control data in the control memory 114 according to the control command from the system control unit 130 and is managed by the AAL processing unit 113, The packet memory 115 is accessed when receiving or transmitting / receiving the AAL5 packet.

The AAL processing unit 113 constructs and transmits frame relay frames in the form of AAL5 packets, and performs interworking between the frame relay and the ATM, so that the network interworking unit between the frame relay and the ATM performs the FR-SSCS function.

The frame relay matching unit 120 performs a function of accessing a private frame relay network or a plurality of frame relay terminals via a physical interface through the frame relay control unit 121, And performs a transmission / reception function of a frame relay frame using the memory 133. In addition, the frame relay matching unit 120 has a function of selecting a use speed based on a supportable speed of a frame relay terminal or a private frame relay network to be connected.

The system control unit 130 includes a central processing unit (CPU), a control circuit unit 131, an EPROM 132, a system memory 133, a backup memory 134, a timer, And a control unit 135. The EPROM 132 performs an interlock function of the system control and the frame relay frame according to the program stored in the EPROM 132 through the CPU and the control logic unit 131. The timer and the operation terminal matching unit 135 ) To perform the system timer function and the operation terminal matching function.

The system controller 130 analyzes the connection identifier of the frame relay frame input through the frame relay matching unit 120 and transmits a message for managing the frame relay virtual line state, that is, a local management interface LMI), the American National Standards Institute (ANSI) Tl.617 Annex D, or the Q.933 Annex A message of the International Telecommunication Union, the protocol processing is performed according to the state management message processing procedure, and the frame relay frame When the connection identifier of the FR-SSCS indicates the user connection, the frame relay connection identifier is converted and transmitted to retrieve the interworking information and transmitted to another frame relay terminal connected to the apparatus, or to transmit to the ATM network side, And selects a corresponding virtual circuit of the ATM and transmits the frame relay frame to the ATM matching unit 110 Control via the ATM network so that they can be transmitted to a remote location. At this time, the frame discard priority information recorded in the frame relay frame, the congestion experience information, the cell discard priority order information in the ATM cell, and the mapping information of the cell congestion experience information are both made. The system control unit 130 determines whether the virtual circuit management protocol type used in the private frame relay network or the frame relay network is LMI, ANSI T1, or ANSI T1 based on the frame relay virtual circuit management message input through the frame relay matching unit 120. [ .617 Annex D, ITU-T Q.933 Annex A, or a function that does not use the PVC management protocol.

In addition, the system controller 130 analyzes the connection information and the connection identifier of the FR-SSCS input from the ATM matching unit 110 and processes the received frame in the rainfall state management message processing procedure of the frame relay virtual circuit state management message If the received frame is a user connection frame, a frame relay connection identifier for a weak frame relay network or a frame relay terminal is assigned according to the frame relay interworking information to form a frame, 120 to be transmitted to the destination frame relay network or the frame relay terminal.

The system controller 130 manages the failure of the ATM physical layer and performs the management functions of the ATM layer and the frame relay layer. A multiple-to-one mapping function that multiplexes multiple frame relay virtual circuits into one ATM virtual circuit for simultaneously interconnecting a plurality of private frame relay communication networks or frame relay terminals, and mapping one frame relay virtual circuit to one ATM virtual circuit One-to-one mapping function.

The backup memory 134 stores connection information and system parameters necessary for system operation in a nonvolatile manner so that the information is not lost even when the power is turned off. When the power is re-supplied, these information can be used again as connection information and system parameters The nonvolatile storage function of the information is performed.

The network interworking device between the frame relay and the ATM according to the present invention can simultaneously access a plurality of remote frame relay terminals or frame relay networks by using a plurality of virtual channel setting capabilities of the ATM communication network. Information, FR-SSCS connection identifier, virtual circuit information of the ATM communication network, and related parameters.

The network interworking device between the frame relay and the ATM according to the present invention performs an operation management function through the local operation management function at the operation terminal through the operation terminal matching unit 135. [

FIG. 2 shows a configuration of a protocol to be processed by a network interworking device between a frame relay and an ATM according to the present invention, and a flow of data flow. FIGS. 3A to 3E show various embodiments of the present invention.

FIG. 3A illustrates an interworking configuration of a private frame relay network through an ATM communication network, FIG. 3B illustrates an interworking configuration between a private frame relay network and a broadband frame relay terminal, FIG. 3E shows an interlocking configuration between a frame relay terminal and a broadband frame relay terminal. FIG. 3E shows a configuration diagram of interworking between a frame relay terminal and a private frame relay network.

As described above, the network interworking device between the frame relay and the ATM according to the present invention can be interconnected through the ATM communication network, which is a high-speed information communication network, by connecting the private frame relay network, the flow computer supporting the frame relay, And can play a role in building the foundation of society.

It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the present invention as defined by the appended claims and their equivalents. .

Claims (4)

An ATM matching unit for performing a connection with an ATM switch, an ATM cell, an AAL5 packet, and an operation management cell, A frame relay matching unit for connecting to and receiving a frame relay frame from a private frame relay network or a plurality of frame relay terminals and controlling the system, ATM virtual circuit management, frame relay virtual circuit management, system data management, And a system control unit for performing a system operation management function and the like. The method according to claim 1, The ATM matching unit includes a physical layer processing unit for connecting to the physical interface and mapping an ATM cell to a payload of a physical layer frame, an ATM layer processing unit for generating and processing an ATM cell, a frame relay frame divided into ATM cells, An AAL processing unit for reassembling into a frame relay frame, a control memory for storing control data for performing functions of the AAL processing unit, and a packet memory for transmitting and receiving the AAL5 packet and the operation management cell. Interlocking device. The method according to claim 1, Wherein the frame relay matching unit comprises a frame relay control unit for connecting to a private frame relay network or a plurality of frame relay terminals, and a system memory for performing a transmission / reception function of a frame relay frame. The method according to claim 1, The system controller includes a system memory for performing a transmission / reception function of a frame relay frame, a CPU and a logic controller for performing system control and a frame relay frame interlocking function according to a program stored in the EPROM, a system timer function, And connection information and system parameters necessary for system operation are stored so that these information are not lost even when the power is shut down and these information are reused as connection information and system parameters when power is supplied again And a back-up memory for enabling the frame relay and the ATM.