KR20010075867A - Method of PVC control for frame relay interworking - Google Patents

Abstract

PURPOSE: A method for controlling a permanent virtual connection(PVC) of a frame relay interlocking device is provided to connect a conventional frame relay network to an ATM network to transmit a frame data by receiving a frame relay subscriber register and connection register request and an ATM and frame relay interconnection setting request and providing an ATM switch system internal path to a frame relay subscriber. CONSTITUTION: If an ATM connection setting request IPC(Inter Processor Communication) is received from a SPVCF(Semi-permanent Point-to-Point Virtual Connection Control), it is checked whether a connection type is a VCC(Virtual Channel Connection)(404). If the connection type is not the VCC, an ATM connection setting failure response IPC is transmitted to the SPVCF(417). If the connection type is the VCC, a line number from a receiving IPC buffer, an input VPI(Virtual Path Identifier), and an input VCI(Virtual Channel Identifier) are registered in a CAM(Content Addressable Memory) and a transmission connection identifier(405). It is checked whether the generated transmission connection identifier is normal or abnormal(406). If the generated transmission connection identifier is normal, the line number is defined as a module VPI and a value for adding 100 of a hexadecimal number to the transmission connection identifier as a module VCI, and the line number, the module VPI, and the module VCI are registered in the receiving CAM for generating a receiving connection identifier(407). It is checked whether the generated receiving connection identifier is normal or abnormal(408). If the generated receiving connection identifier is normal, a line number, an output VPI, an output VCI, and a routing tag are stored in a receiving header converting table corresponding to the receiving connection identifier(409). A line number, a module VPI, a module VCI, and an FRIA(Frame Relay Interface Apparatus) number are stored in a transmitting header converting table corresponding to a transmitting connection identifier(410).

Description

Permanent virtual connection control method of frame relay interlocking device {Method of PVC control for frame relay interworking}

The present invention realizes a method and control method for a permanent virtual connection of a frame relay interworking apparatus which transmits frame data by connecting an existing frame relay network without an asynchronous transfer mode (ATM) adaptation function to an ATM network. The present invention relates to a computer-readable recording medium having recorded thereon a program.

1 is a mapping structure diagram for VPI / VCI generation of an ATM connection corresponding to a conventional frame relay connection.

As shown in FIG. 1, in the related art, an interworking function such as header mapping of a frame-to- ATM cell is required for data transmission between a frame relay and an ATM, and includes eight FRIA numbers (BD2 to BD0) and eight line numbers per FRIA. (LI2 ~ LI0), 32 subscriber numbers (SN4 ~ SN0) per line and 1024 DLCI (DL9 ~ DL0) are fixedly assigned to the header area of ATM cell, so it is defined when system operator establishes subscriber connection and ATM connection. VCI / VCI must be used, and DLCI bit is fixed to 10 bit, so DLCI bit length cannot be more than 10 bit and must be connected in order of frame relay subscriber registration, frame relay connection registration, ATM connection setting. There was this.

Since the frame relay service type provided in the related art has been a method through a frame relay switch supporting a frame relay protocol, in order for the ATM network to accommodate the frame relay network, an interworking device having a heterogeneous interworking function may be configured outside or inside the switching system. There was a problem that should be. In addition, in the conventional frame relay interworking apparatus, the system operator must set up the ATM connection after the frame relay subscriber registration and connection registration, and a virtual path identifier / virtual channel identifier (VPI / VCI: Virtual Path identifier) for ATM connection to the frame relay subscriber. In the method of generating an identifier (Virtual Channel Identifier), the allocation VPI / VCI range is limited.

Therefore, the ATM switching system directly performs the frame relay interworking function, and manages frame relay subscriber and connection information necessary for interworking, and separates the frame relay from both ends of the ATM using a Permanent Virtual Connection (PVC). In order to be able to access ATM switching system without device, and to improve the disadvantages of conventional frame relay interworking device, it is possible to improve the frame relay connection establishment method and limit the use range of VPI / VCI when setting ATM connection to frame relay subscriber. There is a need for a solution capable of solving the problem and extending the DLCI length.

In order to solve the above problems, the present invention provides a frame relay interworking apparatus for transmitting frame data by connecting an existing frame relay network without an ATM adaptation function to an ATM network in an asynchronous transfer mode (ATM) switching system. It is an object of the present invention to provide a method for controlling a permanent virtual connection of a computer and a computer-readable recording medium recording a program for realizing the method.

1 is a mapping structure diagram for VPI / VCI generation of an ATM connection corresponding to a conventional frame relay connection.

2 is an exemplary hardware configuration of a frame relay interworking apparatus to which the present invention is applied.

3 is an exemplary software configuration of a frame relay interworking apparatus to which the present invention is applied.

Figure 4a is a detailed flow diagram of an embodiment of a frame relay interworking device ATM connection process of the permanent virtual connection control method according to the present invention.

4b and 4c are detailed flowcharts illustrating an embodiment of a method for releasing an ATM connection of a frame relay interworking device in a method of controlling a permanent virtual connection according to the present invention.

5A and 5B are detailed flowcharts illustrating an embodiment of a frame relay subscriber registration and deletion process in the method of controlling persistent virtual connection according to the present invention.

6A and 6B are detailed flowcharts illustrating one embodiment of a frame relay connection registration and deletion process in the method of controlling a permanent virtual connection according to the present invention.

7A and 7B are detailed flowcharts illustrating an embodiment of establishing and releasing a frame relay and ATM interconnect in a persistent virtual connection control method according to the present invention.

8 is a flowchart of user cell by ATM connection establishment according to an embodiment of the present invention;

* Explanation of symbols for the main parts of the drawings

20: ATM switch (ALS) 21: access switch call control module (ASCM)

22: Frame Relay Interworking Module (FRIM)

In order to achieve the above object, the present invention provides a method for controlling a virtual connection in a frame relay interworking apparatus, in accordance with a request for establishing an asynchronous transfer mode (ATM) connection from an operator or network management layer of an asynchronous transfer mode (ATM) switching system. A first step of the frame relay interworking apparatus allocating a transmission band for frame relay connection; And permanently of the asynchronous transfer mode (ATM) switching system for the frame relay subscriber to which the frame relay interworking device is registered according to a frame relay subscriber registration and connection registration request and an asynchronous transfer mode (ATM) and a frame relay interconnect setting request. And a second step of providing a virtual connection (PVC) internal path to connect the frame relay network without the asynchronous transfer mode (ATM) adaptation function to the asynchronous transfer mode (ATM) network.

The present invention provides a frame relay interworking apparatus including a processor in response to a request of an asynchronous transfer mode (ATM) connection setup request from an operator of an asynchronous transfer mode (ATM) switching system or a network management layer. Allocating a transmission band for relay connection; And permanently of the asynchronous transfer mode (ATM) switching system for the frame relay subscriber to which the frame relay interworking device is registered according to a frame relay subscriber registration and connection registration request and an asynchronous transfer mode (ATM) and a frame relay interconnect setting request. A computer-readable recording medium that records a program for providing a virtual connection (PVC) internal path to connect a frame relay network without an asynchronous transfer mode (ATM) adaptation to an asynchronous transfer mode (ATM) network. To provide.

According to the present invention, a frame relay interworking device receives an ATM connection establishment request from an ATM switching system operator or a network management layer, allocates a transmission band for a frame relay connection, establishes a frame relay subscriber registration and connection registration request, and establishes an ATM and frame relay interconnection. The present invention relates to a method for controlling a persistent virtual connection of a frame relay interworking apparatus that connects an existing frame relay network without ATM adaptation function to an ATM network by providing an internal path of an ATM switching system to a registered frame relay subscriber upon receiving a request. .

To this end, in the present invention, the frame relay interworking device is mounted in a module form in the ATM switching system, the ATM connection to the interworking device is established according to the connection request through the system operator interface or the network management layer, and the frame relay subscriber and the frame relay The connection is registered to provide the PVC internal path of the ATM switching system for the registered frame relay connection. Here, the frame relay interworking device accommodates 64 E1 or DS1 frame relay interfaces or three DS3 frame relay interfaces.

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

FIG. 2 is an exemplary hardware configuration diagram of a frame relay interworking apparatus to which the present invention is applied. In the drawing, "20" denotes an ATM local switch (ALS) and "21" denotes an access switch call control module in the ALS 20 ( ASCM: Access Switching Control Module, "22" is Frame Relay Interworking Module (FRIM), "221" is Frame Relay Connection Control Appratus (FRCA), and "222" is Frame Frame Relay Interface Appratus (FRIA).

As shown in FIG. 2, the hardware configuration of the frame relay interworking apparatus to which the present invention is applied belongs to the frame relay interworking module (FRIM) 22 and processes 8 DS1 / E1 interfaces and frame to ATM cell conversion functions. Frame Relay Matching Device (FRIA) 222 and FRIM 22, which receives system clock from ATM switch (ALS) 20 and distributes to FRIA 222, and interprocessor communication (IPC) Frame relay connection control device (FRCA) 221 for transmitting cell and user cell and ATM switch matching function, and access switch call control module (ASCM) 21 in ALS 20 for controlling subscriber and call connection. It is composed of

FIG. 3 is an exemplary software configuration of a frame relay interworking apparatus to which the present invention is applied. In the drawing, "30" denotes a frame relay service management function block (FRSHF) and "31" denotes a semi-permanent point-to-point virtual connection control function. Block (SPVCF: Semi-permanent Point-to-Point Virtual Connection Control), "32" is Frame Relay Connection Control Function (FRCF), and "33" is Frame Relay Matching Function Block (FRIF: Frame Relay Interface Function).

As shown in FIG. 3, the software configuration of the frame relay interworking apparatus to which the present invention is applied includes Q.922 core function, network management layer protocol processing, operation and maintenance (OAM), and PVC. It requests frame relay connection and ATM connection through the control bus between the FRIF 33 and the FRIF 33 which handles the state management function, and transmits the result to the call processing processor, and periodically checks the link status to check the result. FRCF 32 and ASCM 21 related to the present invention delivered to the operation and maintenance processor, and manages the frame relay subscriber information and connection information, and performs the interworking function according to the frame relay service characteristics and ATM service characteristics It is composed of the FRSHF 30 and the SPVCF 31 belonging to the ASCM 21 and performing the point-to-point leased line service control requested by the management plane function.

In order to perform the frame relay interworking function, the following ATM connection establishment and deletion, frame relay subscriber registration and connection registration, deletion, frame relay and ATM interconnection establishment and deletion should be performed. This will be described in more detail.

4A is a detailed flowchart illustrating an embodiment of an ATM connection setting process of a frame relay interworking device in a method of controlling a permanent virtual connection according to the present invention.

As shown in Figure 4a, the frame relay interworking device ATM connection setup process of the persistent virtual connection control method according to the present invention, first used in the FRCF (32) subscriber management table, transmission connection management table, reception connection management table, etc. In order to receive the IPC cell input from FRSHF 30 and SPVCF 31 in the ASCM 21, register the IPC reception process (401), and respond to the LIPC (FRIM 33) from FRIF (33). In step 402, a FRIA response message check timer for periodically checking a local IPC) is registered.

After receiving the ATM connection establishment request IPC from the SPVCF 31 (403), it is checked whether the connection type is a virtual channel connection (VCC) (404), and if not, the ATM is sent to the SPVCF (31). The connection establishment failure response IPC is transmitted (417). In this case, if the connection type is a virtual channel connection (VCC), the line number, input VPI, and input VCI are registered in the transmission content addressable memory (CAM) from the receiving IPC buffer to generate a transmission connection identifier (405). .

Next, it is checked whether the generated transmission connection identifier is normal or abnormal (406), and if abnormal, transmits the ATM connection establishment failure response IPC to the SPVCF 31 (417). In this case, if the transmission connection identifier is normal, the line number is defined as the module VPI and the transmission connection identifier plus 100 hexadecimal is defined as the module VCI, and then the line number, module VPI, and module VCI are registered in the receiving CAM. Generate 407.

Subsequently, it is checked whether the generated reception connection identifier is normal or abnormal (408). If it is abnormal, the ATM connection establishment failure response IPC is transmitted to the SPVCF 31 (417). In this case, if the reception connection identifier is normal, the line number, the output VPI, the output VCI, and the routing tag are stored in the reception header conversion table corresponding to the reception connection identifier (409).

The line number, the module VPI, the module VCI, and the FRIA number are stored in the transmission header conversion table corresponding to the transmission connection identifier (410).

Thereafter, after selecting the FRIA 222 to be transmitted using the line number to transmit the ATM connection setting information to the FRIF 33 (411), the DPRAM of the corresponding FRIA 222 is checked (412). The ATM connection establishment failure response IPC is transmitted to the SPVCF 31 (417). At this time, if the DPRAM test result is normal, the ATM connection information is stored in the memory in the form of LIPC (413) and then the connection information is transmitted to the FRIA 222 via the control bus (414). At this time, the connection information is a line number, input VPI, input VCI, traffic parameters, module VPI, module VCI, and the like.

Next, the connection information transmission status is checked (415), and if abnormal, the ATM connection establishment failure response IPC is transmitted to the SPVCF 31 (417). If the transmission connection management table and the reception connection identifier indicated by the transmission connection identifier are normal, Connection information is stored in the received connection management table indicated (416), and the connection status bits are defined as connection normal.

Here, when the FRIA response message check timer is activated, the response LIPC is read from the DPRAM, assembled into the ATM connection establishment response IPC, and transmitted to the SPVCF 31.

4b and 4c are detailed flowcharts illustrating an embodiment of an ATM connection release process of a frame relay interworking device in a method of controlling a permanent virtual connection according to the present invention.

As shown in Figure 4b and 4c, the frame relay interworking device ATM connection release process of the persistent virtual connection control method according to the present invention, if the ATM connection release request IPC is received from the SPVCF 31 (421), the connection type is It checks whether it is a virtual channel connection (VCC) (422), and if it is not the virtual channel connection (VCC), transmits an ATM disconnection failure response IPC to the SPVCF 31 (433). In this case, if the connection type is a virtual channel connection (VCC), the line number, input VPI, and input VCI are input to the transmission CAM from the reception IPC buffer, and the transmission connection identifier is inquired (423). ).

As a result of the analysis, since there is no connection, the ATM connection failure response IPC is transmitted to the SPVCF 31 (433).

As a result of the analysis, if the transmission connection identifier inquiry result is normal, the line number, input VPI, and input VCI are inputted to the transmission CAM to delete the transmission connection identifier (425), and the header conversion information of the transmission header conversion table for the connection is deleted. 426 and define the connection status bit as unavailable (427).

In operation 428, a line connection number, a module VPI, and a module VCI are inputted to the reception CAM to receive a reception connection identifier. At this time, it is checked whether the inquiry result is normal or abnormal (429), and if abnormal, transmits the ATM connection release failure response IPC to the SPVCF 31 (433). On the other hand, if the reception connection identifier inquiry result is normal, the line number, module VPI, module VCI is input to the reception CAM to delete the reception connection identifier (430), and deletes the header conversion information of the reception header conversion table for the connection; 431, the connection status bit is defined as unavailable (432).

Thereafter, after selecting the FRIA 222 to be transmitted using the line number to transmit ATM disconnection information to the FRIF 33 (434), the DPRAM of the corresponding FRIA 222 is inspected (435) and the SPVCF if the result is abnormal. The ATM connection release failure response IPC is transmitted to 31 (438). At this time, if the DPRAM test result is normal, the ATM disconnection information is stored in the memory in the form of LIPC (436) and then the connection release information is transmitted to the FRIA 222 through the control bus (437). At this time, the connection release information is a line number, input VPI, input VCI, module VPI, module VCI, and the like.

Here, when the FRIA response message checking timer is activated, the response LIPC is read from the DPRAM and stored in the ATM connection establishment response IPC buffer, and the transmission cell count transmitted from the transmission header conversion table in the frame relay direction and the frame relay direction in the reception header conversion table. The received cell coefficient received from the IPC buffer is added to the IPC buffer and transmitted to the SPVCF 31.

5A and 5B are detailed flowcharts illustrating an embodiment of a frame relay subscriber registration and deletion process in a method of controlling a persistent virtual connection according to the present invention.

First, a frame relay subscriber registration process will be described with reference to FIG. 5A.

As shown in Figure 5a, the frame relay subscriber registration process of the permanent virtual connection control method according to the present invention, when the frame relay subscriber registration request IPC is received from the FRSHF 30 (501), the frame relay to the FRIF 33 In order to transmit the subscriber registration information, the FRIA 222 is selected to be transmitted using the line number (502).

Thereafter, the DPRAM of the corresponding FRIA 222 is checked (503). If the result is abnormal, the frame relay subscriber registration failure response IPC is transmitted to the FRSHF 30 (504). If the DPRAM test result is normal, the frame relay subscriber registration information is stored in the buffer in the form of LIPC (505).

In addition, after storing registration information such as access rate, timeslot number, PVC management direction, and signaling protocol in the two-array frame relay subscriber registration information management table including line number and subscriber number (506), FRIA (222) is performed through the control bus. Frame relay subscriber registration information is transmitted (operation 507). In this case, the frame relay subscriber registration information is access rate, timeslot number, PVC management direction, DLCI length, signaling protocol, and the like.

Here, when the FRIA response message checking timer is activated, the response LIPC is read from the DPRAM and the frame relay subscriber registration response IPC is transmitted to the FRSHF 30.

Meanwhile, referring to FIG. 5B, the process of deleting the frame relay subscriber is as follows.

As shown in FIG. 5B, the frame relay subscriber deletion process of the persistent virtual connection control method according to the present invention first receives a frame relay subscriber deletion request IPC from the FRSHF 30 (511), and then routes the signal to the FRIF 33. The FRIA 222 is selected using the number (512).

Thereafter, the DPRAM of the selected FRIA 222 is checked (513). If the result is abnormal, the frame relay subscriber deletion failure response IPC is transmitted to the FRSHF 30 (514). In this case, if the DPRAM test result is normal, the frame relay subscriber deletion information is stored in the buffer in the form of LIPC (515), and the frame relay subscriber deletion information is transmitted to the FRIA 222 via the control bus (516). At this time, the deletion information is a line number and a subscriber number.

Next, the DPRAM transmission state is checked (517). If the result is abnormal, the frame relay subscriber deletion procedure is terminated. If the result is normal, the line number having a value of 0 to 63 and the subscriber number having a value of 1 to 31 are determined. The subscriber status bit in the array frame relay subscriber property management table is defined as unavailable (518).

Subsequently, referring to the outgoing connection management table containing the line number and the subscriber number, the corresponding input VPI and input VCI are inputted to the outgoing CAM to inquire and delete the outgoing connection identifier, and the corresponding MVPI and MVCI are referred to by referring to the incoming connection management table. Input to the receiving CAM and query and delete the receiving connection identifier (519).

Then, the header information of the transmission header conversion table indicated by the transmission connection identifier is deleted, and the header information of the reception header conversion table indicated by the reception connection identifier is deleted (520) to prevent cell transmission.

Here, when the FRIA response message check timer is activated, the response LIPC is read from the DPRAM and the frame relay subscriber deletion response IPC is transmitted to the FRSHF 30.

6A and 6B are detailed flowcharts illustrating an embodiment of registering and deleting a frame relay connection in a method of controlling a persistent virtual connection according to the present invention.

First, the frame relay connection registration process will be described with reference to FIG. 6A.

As shown in Figure 6a, the frame relay connection registration process of the permanent virtual connection control method according to the present invention, when the frame relay connection registration request IPC is received from the FRSHF 30 (601), by using the received line number Select FRIA 222 to send (602).

Thereafter, the DPRAM of the corresponding FRIA 222 is checked (603). If the result is abnormal, the frame relay connection registration failure response IPC is transmitted to the FRSHF 30 (604). If the DPRAM test result is normal, the frame relay connection registration information is stored in the buffer in the form of LIPC (605).

After storing the service type in the two-array frame relay subscriber registration information management table including the line number and the subscriber number (606), the frame relay connection registration information is transmitted to the FRIA 222 through the control bus (607). In this case, the frame relay connection registration information is DLCI, DLCI length, frame relay traffic parameter, interworking service type, congestion management, FRSSCS DLCI and DLCI length.

Here, when the FRIA response message checking timer is activated, the response LIPC is read from the DPRAM and the frame relay connection registration response IPC is transmitted to the FRSHF 30.

Meanwhile, referring to FIG. 6B, the process of deleting the frame relay connection is as follows.

As shown in FIG. 6B, the frame relay connection deletion process of the permanent virtual connection control method according to the present invention first uses a received line number when the frame relay connection deletion request IPC is received from the FRSHF 30 (611). Select the FRIA 222 to transmit (612).

Thereafter, the DPRAM of the selected FRIA 222 is checked (613). If the result is abnormal, the frame relay connection deletion failure response IPC is transmitted to the FRSHF 30 (614). In this case, if the DPRAM test result is normal, the frame relay connection deletion information is stored in the buffer in the form of LIPC (615), and the frame relay subscriber deletion information is transmitted to the FRIA 222 through the control bus (615). At this time, the deletion information is a line number, subscriber number, DLCI, DLCI length.

Here, when the FRIA response message check timer is activated, the response LIPC is read from the DPRAM and the frame relay connection deletion response IPC is transmitted to the FRSHF 30.

7A and 7B are detailed flowcharts illustrating an embodiment of establishing and releasing a frame relay and an ATM interconnect in a persistent virtual connection control method according to the present invention.

First, a process of establishing a frame relay and an ATM interconnect will be described with reference to FIG. 7A.

As shown in Figure 7a, the frame relay and the ATM interconnection setting process of the permanent virtual connection control method according to the present invention, first receiving the frame relay and ATM interconnection connection request IPC from the FRSHF 30 (701), The FRIA 222 to be transmitted is selected using the received line number (702).

Thereafter, the DPRAM of the selected FRIA 222 is checked (703). If the result is abnormal, the frame relay and the ATM interconnect establishment failure response IPC are transmitted to the FRSHF 30 (709). At this time, if the DPRAM check result is normal, the line number, input VPI, and input VCI are inputted to the transmission CAM from the reception IPC buffer to query the transmission connection identifier (704).

Then, it checks whether the transmission connection identifier is normal or abnormal (705), and if abnormal, transmits the frame relay and the ATM interconnect establishment failure response IPC to the FRSHF 30 (709). At this time, if the transmission connection identifier check result is normal, the interconnection status bit of the transmission connection management table indicated by the transmission connection identifier is set (706).

Next, after defining the line number as the module VPI and the value of the transmission connection identifier plus hexadecimal 100 as the module VCI, the line number, the module VPI, and the module VCI are input to the receiving CAM to query the receiving connection identifier (707).

Then, it checks whether the receiving connection identifier is normal or abnormal (708), and if abnormal, transmits the frame relay and the ATM interconnect establishment failure response IPC to the FRSHF 30 (709). In this case, if the reception connection identifier check result is normal, the interconnect status bit of the reception connection management table indicated by the reception connection identifier is set (710).

Subsequently, the frame relay and ATM interconnect information are stored in the memory in the form of LIPC (711), and then the frame relay and ATM interconnect information is transmitted to the selected FRIA 222 through the control bus (712). At this time, the interconnection information is line number, subscriber number, DLCI, DLCI length, VPI / VCI, MVPI / MVCI.

Here, when the FRIA response message check timer is activated, the response LIPC is read from the DPRAM, assembled into a frame relay and an ATM interconnect establishment response IPC, and transmitted to the FRSHF 30.

Meanwhile, referring to FIG. 7B, a process of releasing a frame relay and an ATM interconnect is as follows.

As shown in FIG. 7B, the frame relay and ATM interconnect disconnection process of the permanent virtual connection control method according to the present invention is performed when the frame relay and ATM interconnect disconnect request IPC is first received from the FRSHF 30 (731). The FRIA 222 to be transmitted is selected using the received line number (732).

Thereafter, the DPRAM of the selected FRIA 222 is checked (733), and if the result is abnormal, the frame relay and the ATM interconnect release failure response IPC are transmitted to the FRSHF 30 (739). At this time, if the DPRAM check result is normal, the line number, input VPI, and input VCI are inputted to the transmission CAM from the reception IPC buffer to query the transmission connection identifier (734).

Then, it checks whether the transmission connection identifier is normal or abnormal (735), and if abnormal, transmits the frame relay and the ATM interconnect release failure response IPC to the FRSHF 30 (739). At this time, if the transmission connection identifier check result is normal, the interconnection status bit of the transmission connection management table indicated by the transmission connection identifier is reset (736).

Next, after defining the line number as the module VPI and the value of the transmission connection identifier plus hexadecimal 100 as the module VCI, the line number, the module VPI, and the module VCI are input to the receiving CAM to query the receiving connection identifier (737).

Then, it checks whether the reception connection identifier is normal or abnormal (738), and if abnormal, transmits the frame relay and the ATM interconnect establishment failure response IPC to the FRSHF 30 (739). In this case, if the reception connection identifier check result is normal, the interconnect status bit of the reception connection management table indicated by the reception connection identifier is reset (740).

Subsequently, the frame relay and ATM interconnect information are stored in the memory in the form of LIPC (741), and the frame relay and ATM interconnect information is transmitted (742) to the selected FRIA 222 through the control bus. At this time, the interconnection information is line number, subscriber number, DLCI, DLCI length, VPI / VCI, MVPI / MVCI, and the like.

Here, when the FRIA response message check timer is activated, the response LIPC is read from the DPRAM, assembled into a frame relay and an ATM interconnect establishment response IPC, and transmitted to the FRSHF 30.

As described above, the connection management method of the present invention generates a new MVPI / MVCI for the VPI / VCI input by the operator by controlling the CAM in the FRCA 221 without applying the mapping of FIG. ATM connection is made by MVPI / MVCI, while the ASCM 21 is connected to the VPI / VCI input by the operator, so the VPI / VCI allocation area is not limited.

Here, the DLCI length has 10 bits, 17 bits, and 24 bits according to an interworking standard. In the present embodiment, DLCI length information is transmitted when a frame relay connection registration request is made, so that the DLCI bit may be changed.

In addition, the frame relay and the ATM interconnection setting function may be added to secure the bandwidth resource for the frame relay connection by setting the ATM connection first, and the operator may first set the frame relay connection to determine the ATM traffic parameters.

Therefore, the connection management method of the present invention has three improvements over the conventional method, and the transmission flow of user cells, which is data traffic after ATM connection establishment, is illustrated in FIG. 8.

The present invention described above is capable of various substitutions, modifications, and changes without departing from the spirit of the present invention for those skilled in the art to which the present invention pertains, and the above-described embodiments and accompanying It is not limited to the drawing.

As described above, the present invention receives an ATM connection establishment request from an ATM switching system operator or a network management layer, allocates a transmission band for frame relay connection, establishes a frame relay subscriber registration and connection registration request, and establishes an ATM and frame relay interconnection. By receiving the request and providing the internal path of the ATM switching system to the registered frame relay subscriber, there is an effect of providing the function of transmitting the frame data by connecting the existing frame relay network without the ATM adaptation function to the ATM network.

Claims (9)

In the virtual relay control method in the frame relay linkage device, A first step of the frame relay interworking apparatus allocating a transmission band for frame relay connection according to an request for establishing an asynchronous transfer mode (ATM) connection from an operator of an asynchronous transfer mode (ATM) switching system or a network management layer; And According to the frame relay subscriber registration and connection registration request and the asynchronous delivery mode (ATM) and the frame relay interconnection setting request, the virtual relay of the asynchronous transfer mode (ATM) switching system for the frame relay subscriber to which the frame relay interworking device is registered. The second step of providing a connection (PVC) internal path to connect the frame relay network without the asynchronous transfer mode (ATM) adaptation function to the asynchronous transfer mode (ATM) network. Permanent virtual connection control method of the frame relay interlock device comprising a. The method of claim 1, The asynchronous transmission mode (ATM) connection setting process in the frame relay interworking device, Receives an asynchronous transfer mode (ATM) connection establishment interprocessor communication (IPC) message from the semi-permanent point-to-point virtual connection control function block (SPVCF) and sends the line number, input virtual path identifier (VPI), and input virtual channel identifier (VCI). A third step of registering and inquiring in a content addressing memory (CAM) to generate a transmission connection identifier; If the check result of the transmission connection identifier is normal, the line number is defined as a module virtual path identifier (VPI), and the value obtained by adding the hexadecimal number 100 to the transmission connection identifier is a module virtual connection identifier (VCI), and then the line number, module A fourth step of registering and inquiring a virtual path identifier (VPI) and a module virtual channel identifier (VCI) in a reception content addressing memory (CAM) to generate a reception connection identifier; A fifth step of storing a line number, an output virtual path identifier (VPI), an output virtual channel identifier (VCI), and a routing tag in a reception header conversion table indicated by the reception connection identifier if the reception connection identifier check result is normal; Storing a line number, a module virtual path identifier (VPI), a module virtual channel identifier (VCI), and a frame relay matching device (FRIA) number in a transmission header conversion table corresponding to the transmission connection identifier; After asynchronous transmission mode (ATM) connection information is stored in the memory in the form of frame relay interworking module local interprocessor communication (LIPC) message, the connection information (preferably line number) to the frame relay matching device (FRIA) through a control bus. Transmitting and storing an input virtual path identifier (VPI), an input virtual channel identifier (VCI), a traffic parameter, a module virtual path identifier (VPI), and a module virtual channel identifier (VCI); Checking the transmission state of the connection information, and if it is normal, storing the connection information in the transmission connection management table indicated by the transmission connection identifier and the reception connection management table indicated by the reception connection identifier, and defining the connection status bit as connection normal. 8 steps; And When the Frame Relay Matching Device (FRIA) Response Message Check Timer is enabled, it reads the response Frame Relay Interworking Module Local Interprocessor Communication (LIPC) message from DPRAM and establishes an Asynchronous Transfer Mode (IP) connection. Step 9 to assemble the message into the semi-permanent point-to-point virtual connection control function block (SPVCF). Permanent virtual connection control method of the frame relay interlock device comprising a. The method according to claim 1 or 2, The asynchronous transfer mode (ATM) disconnection process in the frame relay interworking device, Receives an asynchronous transfer mode (ATM) connection request interprocessor communication (IPC) message from the semi-permanent point-to-point virtual connection control function block (SPVCF), and receives a line number and an input virtual path identifier (IPC) from a receiving interprocessor communication (IPC) buffer. VPI) and an input virtual channel identifier (VCI) into the transmission content addressing memory (CAM) to query the transmission connection identifier, and if the query result is normal, the line number, input virtual path identifier (VPI), and input virtual. A tenth step of inputting a channel identifier (VCI) into the transmission content addressing memory (CAM) to delete the transmission connection identifier; An eleventh step of deleting header conversion information stored in the transmission header conversion table indicated by the transmission connection identifier and defining transmission connection status bits as unavailable, thereby preventing data transmission in the frame relay network direction; If the line number, module virtual path identifier (VPI), and module virtual channel identifier (VCI) are inputted to the reception content addressing memory (CAM) to query the reception connection identifier, the line number, module virtual path identifier (VPI) is normal. (VPI), a module virtual channel identifier (VCI) is input into the reception content addressing memory (CAM) to delete the reception connection identifier, and the reception header conversion stored in the reception header conversion table indicated by the reception connection identifier. Deleting the information and defining a reception connection status bit as unavailable, thereby preventing data transmission in the asynchronous transmission mode (ATM) network direction; After storing the asynchronous transfer mode (ATM) connection release information in a memory in the form of a frame relay interworking module local interprocessor communication (LIPC) message, the connection release information (FRIA) to the frame relay matching device (FRIA) through a control bus. Transmitting a line number, an input virtual path identifier (VPI), an input virtual channel identifier (VCI), a module virtual path identifier (VPI), and a module virtual channel identifier (VCI); And When the frame relay matching device (FRIA) response message check timer is activated, a response frame relay interworking module (LIPC) message is read from a DPRAM and an asynchronous transfer mode (ATM) connection setting response inter processor communication ( An IPC) buffer, and adds the transmit cell coefficients transmitted in the frame relay direction from the transmit header conversion table and the received cell coefficients received from the frame relay direction in the receive header conversion table to the interprocessor communication (IPC) buffer. Fourteenth step for transmission to the semi-permanent point-to-point virtual connection control function block (SPVCF) Permanent virtual connection control method of the frame relay interlock device comprising a. The method of claim 1, The frame relay subscriber registration process in the frame relay interworking apparatus, When a Frame Relay Subscriber Registration Request Interprocessor Communication (IPC) message is received from the Frame Relay Service Management Function Block (FRSHF), the frame relay subscriber registration information is transmitted to the Frame Relay Matching Function Block (FRIF) using the line number to transmit the frame relay subscriber registration information. Selecting a frame relay matching device (FRIA); Check the status of DPRAM of the frame relay matching device (FRIA). If the result is normal, the frame relay subscriber registration information (preferably access rate, timeslot number, permanent virtual connection (PVC) management direction, DLCI) A fourth step of storing frame relay subscriber registration information to a selected frame relay matching device (FRIA) through a control bus after storing the length, signal protocol) in a buffer in the form of a frame relay interworking module local interprocessor communication (LIPC) message; ; A fifth step of storing the subscriber registration information in a binary (" 2 ") array frame relay subscriber registration management table consisting of the line number and the subscriber number, and setting the subscriber status bit to an available state; And When the Frame Relay Matching Device (FRIA) Response Message Check Timer is activated, a Frame Relay Subscriber is read into the Frame Relay Service Management Function Block (FRSHF) by reading a Response Frame Relay Interworking Module Local Interprocessor Communication (LIPC) message from DPRAM. Sixth step of sending a registration response interprocessor communication (IPC) message Permanent virtual connection control method of the frame relay interlock device comprising a. The method according to claim 1 or 4, The frame relay subscriber deletion process in the frame relay interworking apparatus may include: When the Frame Relay Subscriber Deletion Request Interprocessor Communication (IPC) is received from the Frame Relay Service Management Function Block (FRSHF), a binary (") consisting of a line number having a first predetermined value and a subscriber number having a second predetermined value is " 2 ") defining a subscriber status bit of the array frame relay subscriber registration information management table as an unavailable state; The received line number and subscriber number are used to find the address of the outgoing connection management table, and the line number, input virtual path identifier (VPI) and input virtual channel identifier (VCI) in the memory of that address are transmitted. An eighth step of querying and deleting the transmission asynchronous transfer mode (ATM) connection identifier by inputting to the CAM and deleting the transmission header conversion information so that the user cell is not transmitted; And The received line number and subscriber number are used to find the address of the incoming connection management table, and the line number, module virtual path identifier (VPI), and module virtual channel identifier (VCI) in the memory of the address are received. A ninth step of querying and deleting an asynchronous transfer mode (ATM) connection identifier by inputting to a CAM and deleting the received header conversion information so that a user cell is not transmitted. Permanent virtual connection control method of the frame relay interlock device comprising a. The method of claim 1, The frame relay connection registration process in the frame relay interworking device, When a Frame Relay Connection Registration Request Interprocessor Communication (IPC) message is received from the Frame Relay Service Management Function Block (FRSHF), the frame relay matching device (FRIA) to be transmitted is selected using the received line number, and the connection registration information (preferably After storing the line number, subscriber number, DLCI, DLCI length, frame relay traffic parameter, interworking service type, congestion management, FRSSCS DLCI and DLCI length) in frame relay interworking module local interprocessor communication (LIPC) message form, And a frame relay connection registration information to the selected frame relay matching device (FRIA) through a control bus. The method according to claim 1 or 6, The frame relay connection deleting process in the frame relay interworking apparatus When the Frame Relay Connection Deletion Request Interprocessor Communication (IPC) message is received from the Frame Relay Service Management Function Block (FRSHF), the frame relay matching device (FRIA) to be transmitted is selected using the received line number, and the connection deletion information is received. (Preferably line number, subscriber number, DLCI, DLCI length) in the form of frame relay inter-module local processor communication (LIPC) message, and then frame relay to the selected frame relay matching device (FRIA) through a control bus. Permanent virtual connection control method of the frame relay interlock device, characterized in that for transmitting the connection deletion information. The method of claim 1, The frame relay and asynchronous transmission mode (ATM) interconnection setting process in the frame relay interworking apparatus, When a frame relay and an asynchronous transfer mode (ATM) interconnect establishment request interprocessor communication (IPC) message are received from the frame relay service management function block (FRSHF), a line number and an input virtual path are received from an interprocessor communication (IPC) buffer. A third step of inputting an identifier (VPI) and an input virtual channel identifier (VCI) into a transmission content addressing memory (CAM) to query the transmission connection identifier; A fourth step of setting an interconnection status bit of a transmission management table indicated by the transmission connection identifier if the check result of the transmission connection identifier is normal; After defining the line number as the module virtual path identifier (VPI) and the transmission connection identifier plus the hexadecimal number 100 as the module virtual channel identifier (VCI), the line number, the module virtual path identifier (VPI), and the module virtual channel identifier. A fifth step of inputting (VCI) to a received content addressing memory (CAM) to query a received connection identifier; A sixth step of setting an interconnection status bit of a reception connection management table indicated by the reception connection identifier if the check result of the reception connection identifier is normal; And Frame Relay and Asynchronous Interconnect Information (preferably Line Number, Subscriber Number, DLCI, DLCI Length, VPI / VCI, MVPI / MVCI) in the form of Frame Relay Interworking Module Local Interprocessor Communication (LIPC) message. After storing in the memory, the seventh step of transmitting the interconnect information to the selected frame relay matching device (FRIA) through the control bus Permanent virtual connection control method of the frame relay interlock device comprising a. In a frame relay interlock having a processor, A function of allocating a transmission band for frame relay connection by the frame relay interworking device according to an asynchronous transfer mode (ATM) connection establishment request from an operator of an asynchronous transfer mode (ATM) switching system or a network management layer; And According to the frame relay subscriber registration and connection registration request and the asynchronous delivery mode (ATM) and the frame relay interconnection setting request, the virtual relay of the asynchronous transfer mode (ATM) switching system for the frame relay subscriber to which the frame relay interworking device is registered. Provides a connection (PVC) internal path to connect a Frame Relay network without Asynchronous Adaptation to an Asynchronous Network. A computer-readable recording medium having recorded thereon a program for realizing this.