KR100266259B1 - Apparatus for transfering data in frame relay module - Google Patents

Abstract

PURPOSE: A device for transmitting data in a frame handler module is provided to exchange the data between frame handlers by using an inner parallel bus, and to perform data communication between different subsystems or between different frame relay modules by using a message switch. CONSTITUTION: An FRM(Frame Relay Module)(210) is composed of FRHs(Frame Relay Handlers)(FR1-FRn) and an FRC(Frame Relay Controller Board)(21). The FRHs(FR1-FRn) perform a link level process for frame relay data received from a subscriber. The FRC(21) performs an exchange function between the FRHs(FR1-FRn). A TP(Telephony Processor)(27) receives a call process related message, an operation/maintenance related message and statistics data through the FRC(21), and controls/operates a frame relay call. An MSCI(26) performs data communication to another FRM through a pre-setup U-link interface. A TSW(22) receives a frame transmitted from the subscriber by being connected through a pre-setup sub highway(23), and processes the received frame data, then exchanges the frame with other FRHs(FR2-FRn) under control of a control processor.

Description

Data transmission device in frame handler module

The present invention relates to a data transmission device in a frame handler module, and more particularly, to a frame for improving the transmission speed by dualizing a data exchange device of a frame relay module and different data communication methods between the same frame module and another frame module. A data transmission device in a handler module.

As is well known in the art, most data networks currently operate based on packet transmission technology, and in particular, in public data networks, packet transmission technology based entirely on the X.25 standard is used internationally and internationally. It is responsible for network layers 1, 2, and 3.

Packet services within an ISDN exchange can be provided in two ways: Case A and Case B, which are cases of the X.31 Recommendations. In the TDX-10 ISDN exchange, there is packet processing within the ISDN exchange, allowing subscribers to access channels B and D. The case B method is adopted, which can be serviced using all channels.

The packet switching service of the TDX-10 exchange does not distribute the packet handling subsystem, the packet handling subsystem, to each subscriber interface module, and all packet traffic passes through the TST switching network within the TDX-10 exchange. It forms a centralized structure that is centralized and processed by the system (Access Switching Subsysem for Packet Switching; ASS-P).

On the other hand, in recent information society, there is a demand for a protocol that can replace the existing X.25 that can transmit more information at high speed, and frame relay is proposed as an alternative.

The existing packet protocol is designed to guarantee the end-to-end transmission quality due to the lack of development of the initial communication path, and performs error detection, error recovery, and flow control in the data link layer, and multiplexing, routing, and flow control in the network layer. A data transmission protocol of X.25 PLP (Packet Layer Protocol) was performed.

However, due to the development of current transmission technology, the error occurrence rate is considerably lowered, thus minimizing various control functions at the data link layer. In the network, only the core functions of Layer 2 required for data transmission are implemented, and functions such as error recovery and flow control are performed. The frame relay enables short delay time and high speed transmission by allowing the user device to perform it when necessary.

In fact, frame relay was proposed in 1986 as the evolutionary step of packet communication in ISDN, and is currently spreading worldwide for use in high-speed data communications.

First, referring to FIG. 1, a frame relay module of a conventional ISDN exchange system, as shown, a frame relay module (hereinafter, abbreviated as FRM) 10 is applied to frame relay data received from a subscriber. Frame Relay Handler (FR-Referred to be referred to as FRH) (F1-Fn) and Frame Relay Controller board to perform the exchange function between a plurality of FRH (F1-Fn) (Hereinafter abbreviated as FRC) (1).

That is, FRH (F1-Fn) is connected to a time switch (TSW) 2 and a subhighway (hereinafter abbreviated as SHW) 3, a frame transmitted from the subscriber through the TSW (2) And the frame data is processed and exchanged with another FRH (F1-Fn) under the control of the FRC (1).

At this time, FRC (1) is connected through the FRH (F1-Fn) and the local parallel bus (Local parallel-BUS, hereinafter referred to as L-BUS) (5) to enable data exchange between the FRH (F1-Fn) Do.

The FRC 1 controls the FRHs (F1-Fn) to enable frame data exchange between the FRHs (F1-Fn).

In addition, the FRC 1 matches the Telephony Processor (hereinafter abbreviated as TP) 7 to supervise call processing related messages received from the FRH F1-Fn, operation and maintenance related messages, and statistical data. By transmitting to the TP 7, the TP 7 controls and operates the frame relay call.

In this case, the FRC 1 transmits the frame data through the message switch (hereinafter referred to as MSCI) 6 when the frame call is exchange between other sub-systems rather than a call within the same sub-system.

However, in the prior art, the transmission rate between FRC (1) and FRH (F1-Fn) has a transmission rate of 2Mbps but between FRC (1) and MSCI (6) having a large number of FRH (F1-Fn). Since the speed is up to 8Mbps and generally 6Mbps, a bottleneck occurs, which causes a transmission delay in the network.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned drawbacks of the prior art, and an object thereof is to provide a frame relay module of an ISDN exchanger that can perform a flame relay protocol and data functions more efficiently and quickly in an ISDN exchange system. .

In order to achieve the above object, the present invention provides a frame relay module configured in a subscriber matching exchange sub-system of an ISDN switch, connected to a time switch and a sub highway, and receives frame data transmitted from a subscriber through the time switch. A plurality of frame relay handlers for processing the received frame data according to a control signal and performing frame exchange with each other, and applying a control signal for data exchange to the frame relay handlers FR1-FRn through a U-link ( FR1-FRn) provides a frame relay module of the ISDN exchange.

1 is a block diagram showing the connection of the frame handler module in the electronic switch according to the prior art,

Figure 2 is a block diagram showing the connection of the frame handler module in the electronic switch according to the present invention.

<Description of the code | symbol about the principal part of drawing>

21: frame relay control board 22: time switch

23: Sub Highway 24: Sub Highway

25 local parallel bus 26 message switch

27: telephony processor FR1-FRn: frame relay handler

210: frame relay module

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

Referring to the configuration of the frame relay module of the switching system of the present invention with reference to Figure 1, as shown, the frame relay module 210 performs a link level processing for the frame relay data received from the subscriber FRH (FR1-FRn) And FRC 21 which performs the exchange function between several FRHs (FR1-FRn), and the call processing related messages received from FRHs (F1-Fn), operation and maintenance messages, and statistical data. 21) TP (27) for controlling and operating a frame relay call and MSCI (for communication with other frame relay modules) through a U-link matching unit in FRH (FR1-FRn). 26) is connected via the SHW 23, receives the frame transmitted from the subscriber, processes the received frame data, and controls the frame with another FRH (FR2-FRn) under the control of a control processor embedded in the FRH (FR1). To It is configured to include the TSW (22) to the ring.

Referring to Figure 2 in detail with respect to the block diagram of the frame handler module in the electronic switch according to the present invention, the frame relay module 210 performs link level processing for the frame relay data received from the subscriber Checks the frame relay handler (FRH) (FR1-FRn) and the buffers of each FRH (FR1-FRn) to move the message from the buffer where the message to be sent is stored to the buffer of the receiving frame handler. Communicates with call processing related messages such as call setup request, call release request, call setup response, call release response, etc., and transmits statistical data collected by lower packet handlers and operation and maintenance related data. It is composed of the FRC (21).

The FRC 21 inside each FRM 210 controls the FRH (FR1-FRn) to perform the function of exchanging frame relay data through a local parallel bus between frame handlers, and handles and operates frame relay calls. In order to perform a maintenance function, a function of performing communication with the upper TP 27 is performed.

The FRHs (FR1-FRn) are connected through the TSW 22 and the subhighway (SHW) 23, and receive frames transmitted from the subscriber through the TSW 22 to receive any of the FRHs (FR1-FRn). The data is stored in a buffer and whether the received frame data is a frame handle in another frame relay module is controlled by the control processor embedded in each FRH (FR1-FRn) and the FRH (FR1-FRn) in the corresponding FRM 210. Exchange frame data.

In addition, each FRH (FR1-FRn) is connected to the FRC 21 through the L-BUSU (25) to communicate with the upper TP (27) in the High-Level Data Link Control (HDLC) format to perform the call processing It is able to perform or report information related to operation and maintenance, and sends and receives call processing related messages such as call setup request, call release request, call setup response, and call release response to the upper TP 27, and the lower packet Delivers statistical data collected by handlers and data related to operation and maintenance.

In addition, the L-BUS connected between each FRH (FR1-FRn) can exchange data for the purpose of data communication and operation and maintenance in the same frame relay module, and each FRH (FR1-FRn) is an MSCI. It is connected to the (26) to enable data communication with other subscriber matching subsystem (ASS).

That is, as described above, the FRH (FR1-FRn), as well as its own FRH (FR1) information, share control information through the IPC (Inter Processor Communication) communication with other FRH (FR2-FRn) and each Frame data exchange between FRHs (FR1-FRn) is enabled, and frame data is transmitted in turn by controlling frame data transmitted to other subscriber matching subsystems.

A buffer (not shown) is placed in each FRH (FR1-FRn) to receive a frame from the buffer of the corresponding FRH (FR1-FRn), and the FRH (FR1-FRn) checks the reception flag and sets the reception flag if the reception flag is set. Perform frame processing function to transmit to the corresponding FRH (FR1-FRn) and set the corresponding transmission flag.

At this time, each FRH (FR1-FRn) transmits the frame data through the MSCI (26) when the frame call is exchange between the ASS, not the call in the same ASS.

The principles of the invention have been described above in connection with specific devices, which are described by way of example only, and are not limited to the spirit of the invention as described in the appended claims.

As described above, the present invention enables communication using an internal parallel bus when exchanging data between frame handlers within the same frame relay, and through U-link when communicating data between different subsystems or frame relay modules. By exchanging data using a message switch, the data bottleneck is eliminated and the internal frame processing speed is improved.

Claims (1)

A Frame Relay Handler (hereinafter referred to as FRH) (FR1-FRn) that performs link level processing on the frame relay data received from the subscriber and performs exchange function between several FRHs (FR1-FRn). An FRM 210 composed of a frame relay controller board (hereinafter abbreviated as FRC) 21; Telephony Processor (TP) for controlling and operating a frame relay call by receiving call processing related messages, operation and maintenance related messages, and statistical data received from the FRH (F1-Fn) through the FRC 21. Abbreviated d), MSCI 26 for communicating with another frame relay module through a U-link matching unit preset to the FRH (FR1-FRn); It is connected through a predetermined subhighway (SHW) 23, receives a frame transmitted from a subscriber, processes the received frame data, and controls the other FRH (under the control of a control processor embedded in the FRH FR1). And a TSW (22) for exchanging a frame with the frame FR2-FRn.

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