KR100198942B1 - Frame relay switching apparatus for isdn switching system - Google Patents

Abstract

The present invention relates to a frame relay switching device for an integrated information communication network (ISDN) exchange, and provides a frame relay service using an out-of-band method in which a channel for transmitting data information and a channel for transmitting control information are separated. In order to provide a relay switching device, frame relay communication control means 21 for performing a high level function during connection, disconnection and call processing of a physical path between a subscriber and a frame processing period; Frame processing control means 23 for performing a control function of a link layer; Frame processing means (25) for exchanging a physical connection of a link layer and a frame of a subscriber; An interprocessor communication network (22) for allowing the frame relay exchange control means (21) and the frame processing control means (23) to communicate with other exchange control devices; And a common bus device 24 that provides a communication path between the frame processing means 25 and the frame processing control means 23 so as to process high-speed packet communication and efficient use of transmission bandwidth and to handle massive traffic. As a result, it can be used as an intermediate step in the evolution of Broadband Integrated Services Network (ISDN).

Description

Frame Relay Switching Device for Integrated Information Network (ISDN) Switch

1 is a block diagram of an ISDN switching system having a frame relay switching function to which the present invention is applied.

2 is a detailed configuration diagram of a frame relay switching device according to the present invention.

3 is a detailed configuration diagram of a frame processing control apparatus according to the present invention.

4 is a detailed configuration diagram of a frame processing apparatus according to the present invention.

* Explanation of symbols for main parts of the drawings

11: primary group speed matching device 12: switch device

13: Frame relay exchange device 14,22: Interprocessor communication network

15: exchange control unit 21: frame relay exchange control unit

23: frame processing controller 24: common bus device

25 frame processing apparatus 31 error processing unit

32: inter-processor communication network matching unit 33: flow control processing unit

34; Address translation unit 35: processor operating system

36: routing information processor 37: common bus matching unit

38: protocol processing unit 39: redundancy control unit

41: frame multiplexer 42: LAPF processing unit

43: congestion control unit 44: frame transmission unit

45: frame processing operation system 46: frame storage unit

47: bus arbitration unit 48: error detection unit

The present invention relates to a frame relay exchange apparatus for an integrated information communication network (ISDN) switch. In the conventional ISDN switch, a high speed packet communication service of more than 64 Kbps was not possible.

Therefore, there is a problem that can not meet the needs of the user in terms of transmission speed, quality and communication costs.

In order to solve the above problems, the present invention provides a channel and control information for transmitting data information by applying a frame relay switch to an ISDN switch to guarantee a transmission speed of 64 Kbps or more and to improve transmission delay characteristics. The frame relay switch is introduced to an existing integrated information network (ISDN) switch to reduce the burden on the network node and minimize the transmission delay in the network by using the method of the band where the transmitting channel is separated. An object of the present invention is to provide a frame relay exchange device capable of providing a service.

In order to achieve the above object, the present invention is connected to an external switch, the frame processing means for exchanging the physical connection of the link layer and the frame of the subscriber; Common bus means connected to said frame processing means to provide a communication path; Frame processing control means connected to the common bus means to perform a control function of a link layer; An interprocessor communication network connecting the frame processing control means to communicate with other switching controllers; And frame relay exchange control means connected to the inter-processor communication network and performing a higher level function during the connection, disconnection, and call processing of the physical path between the subscriber and the frame processing means.

In the frame relay exchange according to the present invention, it is possible to apply conventional terminals and communication control devices as it is, since the packet protocol is simplified and the high speed data transmission is performed for interconnection between local area networks and high speed mass data communication. There is an advantage applicable to various communication devices. Frame Relay is a protocol that performs a combination of Layer 2 relay and Layer 3 routing functions of the Open System Interconnection (OSI) reference model, which simplifies packet processing and speeds up the exchange process.

Hereinafter, with reference to the accompanying drawings will be described an embodiment according to the present invention;

1 is a block diagram of an integrated information communication network (ISDN) switching system having a frame relay switching function to which the present invention is applied. Frame processing function within ISDN to realize frame relay service for high speed packet communication in primary group speed matching device 11 and ISDN which enables service to users requesting high speed data Frame relay exchange device 13 for receiving the switch, switch device 12 for providing a path for transmitting the H-channel high-speed packet data to the frame relay exchange device 13, and performs the function of controlling the operation of the devices in the exchange An exchange control device 15 is provided, and an interprocessor communication network 14 which provides a smooth communication function between processors of respective devices.

The frame relay service for high-speed packet communication of 64 Kbps or more in an ISDN switch uses a primary group speed matching device 11 in an ISDN subscriber matching device. In the primary group speed matching device 11, the time switch in the switch device 12 transmits the 64 Kbps channel transparently in order to efficiently use the N x 64 Kbps (1N30) band in the same manner as the 64 Kbps circuit switched call in real time. Allocate circuits by maintaining timeslot order.

Therefore, service is available to users who require high-speed data, and the service channel types and transmission rates provided are allocated to H0-channels (384Kbps), H11-channels (1,536Kbps), and H12-channels (1,920Kbps).

In order to accommodate the above-mentioned H-channel service in the frame relay switching device 13, if the channel setting requires the H-channel setting for the high speed packet communication according to the Q.933 procedure, which is a D-channel protocol, the primary group speed matching is performed. The device 11 and the frame relay exchange device 13 perform processor communication with the exchange control device 15 via the interprocessor communication network 14 to select a frame processor in the frame relay exchange device 13.

As described above, in the ISDN switch, the frame relay exchange is concentrated to all the frame data through the primary group speed matching device 11 to the frame relay switch 13 through the switch device 12 which is a physical path.

2 is a block diagram of a frame relay switching device according to the present invention. The frame relay switching control device 21 and link layer, which are in charge of the connection, release, and call processing process upper level functions of a subscriber and a frame processing period, are performed. A frame processing controller 23 for controlling a control function of the frame; The inter-processor communication network that enables the frame processing device 25, the frame relay switching control device 21, and the frame processing control device 23, which physically connect the link layer and exchange frames, to communicate with other switching control devices. (22), a common bus device (24) which performs a function of providing a communication path between the frame processing device (25) and the frame processing control device (23).

Here, the frame processing controller 23 receives the path information for the frame relay call from the frame relay exchange control apparatus 21 through the interprocessor communication network 22 and receives the frame processing apparatus 25 through the common bus device 24. Set the link with). The frame processing unit 25 is interconnected as a switch device and a bidirectional subhighway, a frame synchronization of 8KHz, and a clock signal of 2.048KHz so as to sequentially receive the grouped channels in the switch device and to provide 384Kbps data service according to the transmission rate provided. Frame processing device to perform -HO, frame processing device to perform 1536Kbps data service -H12, frame processing device to perform 1920Kbps data service H-12 in the form of various uses according to the user's capacity. In addition, a user with frequent line usage may allocate a fixed path between the network and the user terminal at the time of subscription, and set up and use a permanent virtual line without complicated procedures such as setting and releasing a route for data transmission.

Accordingly, in order to provide a frame relay service for high-speed packet communication using an ISDN high-speed H-channel, a routing from an ISDN subscriber module to a frame module requires a logical connection identifier and information. Set up a virtual call to the terminal by negotiating the rate. When establishing a call, only the network layer, which is a D-channel protocol, is performed by the Q.933 procedure, and the network node functions only the core functions of layer 2 by using an out-of-band method that transmits only the link layer frames in the network. To quickly transfer user information.

As such, in order to realize a frame relay service for high-speed packet communication in an ISDN, a frame relay exchange device accommodates a frame processing function in an ISDN, a channel and control information for transmitting data information. The channel for transmitting the signal provides a separate band.

3 is a block diagram of a frame processing control apparatus according to the present invention, which performs frame routing, mode selection, order keeping, response, and link control. The error recovery and flow control functions are handled by the terminal of the user equipment.

That is, the processor operating system 35 and the processor operating system 35 that provide processor management, memory management, and inter-processor communication network management functions so as to communicate with each other so that each process of the software block of the frame processing controller can be smoothly performed. Routing information processing unit 36 connected to the network and controls the routing of the frame by using a logical connection table, and updates the routing for each interval section, the address that is responsible for the function to make the logical connection table value changes according to the connection to reach the destination A conversion unit 34, an inter-processor communication network matching unit 32, and a frame processing device for exchanging messages related to H-channel setting with a subscriber matching exchange control device to which the frame relay switching control device and an ISDN subscriber belong; The frame processing apparatus is operated by performing mutual communication between the frame processing controllers. Efficient transmission to the user by dividing several different protocol types such as a frame processing apparatus-HO / H11 / H12 that can be provided to the user by being connected to the common bus matching unit 37 and the common bus matching unit 37 to be subjected to Protocol processing unit 38 performing a function of providing a bandwidth, an error processing unit 31, a flow control processing unit 33, and a frame providing a function of delegating flow control and error control to a terminal to ensure end-to-end transmission quality In order to increase the reliability of the processing control device, a redundancy control unit 39 in charge of redundancy control is provided.

4 is a block diagram of a frame processing apparatus according to the present invention, and provides core functions related to link access procedures to frame mode bearer service (LAPE) frame processing such as frame division and multiplexing, congestion control, and error detection in a frame relay link layer. do.

Here, the frame processing apparatus is a frame processing operation system 45 that provides real-time task management, memory management, time management functions, etc. to perform a smooth function of a software block. A frame multiplexer 41 providing unit multiplexing, a LAPE processor 42 connected to the frame multiplexer 41 to process a frame relay LAPE protocol, and interconnecting with a common bus matching unit to transmit and receive a frame with a network For this purpose, the frame transmitter 44, the LAPE processor 42, the frame transmitter 44, and the frame processing operation system 45, which perform a function of modifying and transmitting a protocol between frame processing apparatuses or a frame processing controller, The bus arbitration unit 47, which handles messages without collision when accessing the frame storage unit, arrives by the bus arbitration unit 47, respectively. Frame storage unit 46 is composed of a FIFO (Fitst In Firsst Out) buffer for processing messages and storing them, and congestion situations in which traffic is congested and frames being lost are lost, performance degradation and transmission delays occur. The congestion control unit 43 detects and adjusts a transmission amount of service traffic, and an error detection unit 48 for detecting and discarding a frame in which an error occurs while the frame is being transmitted.

The present invention described above is not limited to the above-described embodiments and the accompanying drawings, and various substitutions, modifications, and changes are possible in the art without departing from the spirit of the present invention. It is evident to those who have knowledge of.

As described above, the present invention provides a wide range of bandwidth and provides high bit rate user information by using an H-channel service that can be realized in a primary group speed matching block among the interfaces provided to a user of an ISDN exchange system. According to the capacity, 384Kbps for H0-channel, 1,536Kbps for H11-channel, and 1,920Kbps for H12-channel can be transferred without any change of integrated user information, and the frame relay service can be transferred to the existing integrated telecommunication network. (ISDN) is applied to the edification system to increase the transmission speed from 64Kbps to about 2Mbps so that high-speed packet communication and efficient use of transmission bandwidth and massive traffic can be handled. There is an effect that can be used as.

Claims (5)

Frame processing means connected to an external switch for exchanging a physical connection of a link layer and a frame of a subscriber; Common bus means connected to said frame processing means to provide a communication path; Frame processing control means connected to the common bus means to perform a control function of a link layer; An interprocessor communication network connecting the frame processing control means to communicate with other switching controllers; And a frame relay exchange control means connected to the inter-processor communication network and performing a high level function during connection, disconnection, and call processing between a physical path between a subscriber and a frame processing means. Relay changer. 2. The apparatus of claim 1, wherein the frame processing means comprises a plurality of frame processing means for performing data service for each channel. The apparatus of claim 1, wherein the frame processing control means comprises: processing means for managing a processor, a memory, and an interprocessor communication network; Routing information processing means connected to said processing means for controlling frame routing; Address translation means connected to said processing means for performing new routing in each section and guiding a transmission frame to a destination; Interprocessor communication network matching means connected to said processing means for exchanging channel setting related messages with said frame relay switching control means and subscriber matching switching control device; Common bus matching means connected to said processing means for performing mutual communication between said frame processing means and a frame processing control means; Protocol processing means connected to the common bus matching means for providing a transmission bandwidth according to an information transmission rate of a protocol type that can be provided to a user; Error processing means coupled to said processing means for delegating error control to a terminal; Flow control processing means connected to said processing means for delegating flow control to a terminal; And a redundancy control means connected to said processing means and in charge of redundancy control. The apparatus of claim 1, wherein the frame processing means comprises: frame processing operation means for managing a real time task, a memory, and a time; Frame multiplexing means for multiplexing, on a frame-by-frame basis, high-speed data in which the order of time slots is preserved in an external switch device; Means for processing a frame relay Link Access Procedures to Frame Mode Bearer Service (LAPE) protocol located in the frame processing operation means and in the frame multiplexing means; It is connected to the frame processing operation means, and interconnected with the common bus matching means of the frame processing control means through the common bus to modify the protocol between the frame processing means or frame processing control means to transmit and receive the frame with the network. Frame transmission means for transmitting; Frame storage means connected to the frame processing operation means for storing an arrival message; Bus arbitration means, connected to said frame processing operation means, each functional means accessing said frame storing means to be responsible for arbitration in message processing; A congestion control means connected to the frame processing operation means and controlling a transmission amount of service traffic by detecting a congestion situation in which traffic is congested and a frame being transmitted is lost, or a performance degradation or transmission delay occurs; And error detection means connected to said frame processing operation means for detecting a frame in which an error has occurred during frame transmission. The frame relay device according to claim 1, wherein said frame storage means comprises a first-in, first-out buffer.