KR20000031826A - Atm traffic generation device and method for controlling cell generation speed - Google Patents

Abstract

PURPOSE: An ATM traffic generation device for controlling a cell generation speed is provided to realize various kinds of traffic in a minimum hardware by generating various kinds of ATM cell according to a user's request. CONSTITUTION: An ATM traffic generation device for controlling a cell generation speed comprises a cell generation portion, a cell generation control portion(12), a physical layer connection portion(13), and a switching portion(14). The cell generation portion generates a cell by performing the multiplexing for stored cell information according to an information selection signal. The cell generation control portion outputs the information selection signal to the cell generation portion. The physical layer connection portion generates a connection signal to an outer physical layer. The switching portion generates a connection signal to an outer switching device.

Description

Asynchronous transmission mode traffic generating device with adjustable cell generation rate and method

The present invention provides an asynchronous transfer mode (ATM) system asynchronous to solve the disadvantages that occur in the existing Asynchronous traffic mode (ATM) traffic generating devices due to the large capacity and the addition of new service functions Apparatus for generating a transmission mode (ATM) traffic and a method thereof and a computer-readable recording medium having recorded thereon a program for realizing the method. In particular, any form, arbitrary, which a user requests an asynchronous transmission mode (ATM) cell. A non-transmission mode (ATM) traffic generating apparatus for generating the number and at any speed, and a method and a computer-readable recording medium recording a program for realizing the method.

In general, in the asynchronous transfer mode (ATM) method, since the information transmission capacity is allocated on a cell basis according to a user's request, it is possible to flexibly accommodate a variety of data rates, and is economical by transmitting traffic having a variable bit rate through statistical multiplexing. Information can be conveyed. Therefore, in order to check the connection state between the asynchronous transfer mode (ATM) devices and the protocol operation state of each device, a device capable of generating traffic suitable for operation of each device is required.

Conventionally, a method of manufacturing a traffic generator in a single board form using a memory and various elements, storing cell data to be generated from a processor in a memory, and periodically reading the data from a cell generation control circuit to generate a traffic of a required type Mainly used.

An example of the prior art (asynchronous traffic traffic monitor / protocol analysis apparatus and method) is as follows.

When testing a B-ISDN development device, it is necessary to test whether the system under test is correctly implemented according to the standard. Therefore, there is a need for a test apparatus capable of generating a test event while performing a relative role of the test apparatus in terms of the system under test. The above example relates to a traffic monitor / protocol analysis apparatus for testing whether a protocol of a system connected by a broadband general information network user network interface signaling method is operated according to a standard.

The traffic monitor / protocol analysis device is connected to a test control unit for controlling the operation of the test device and receiving and outputting a control command of a test function user, a traffic transmission unit for transmitting an asynchronous transmission mode (ATM) cell, and a line interface. And a line receiver and a traffic receiver for receiving asynchronous transmission mode (ATM) cells.

The traffic monitor / protocol analyzer enables to establish a protocol test environment of the broadband integrated information network development device at a low cost, thereby shortening the development period of the system and early detecting problems that may occur when the system is commercialized. To this end, it provides a function of transmitting and receiving a protocol test frame and a traffic analysis function, and is used as an apparatus for interoperability testing with neighboring devices.

Another example of the prior art (asynchronous transmission mode traffic generating device) is as follows.

The test cell transmission function selects a start port number and an end port number that the tester wants to test, and thus creates a test cell and stores it in the transmission memory area. After writing the last address of the transfer memory area to the transfer address register, the transfer start port number and the last port number are written to the transfer port select register. This completes the preparation for the test cell transmission.

The test cell receive function selects the starting port number and the last port number for which the tester wants to receive the test cell, and after writing the last address of the memory area for receiving the test cell in the receiving address register, the receiving start port number and the last port number. Write to the receive port selection register. This completes the preparation for test cell reception.

When the transmission operation is completed, the processor transmits the cell data stored in the memory in synchronization with the switch board along with the control signal. In addition, when the reception operation is completed, the control cell is sent to the switch in accordance with the routing header information of the transmitted test cell and the switch to receive the test cell. The received cell is stored in memory so that the processor can read it. The processor compares the test cell data transmitted and received to determine whether the switch is in normal operation.

Another example of the prior art (unallocated cell generator in an asynchronous delivery mode layer of a broadband general information communication network) is as follows.

The unassigned cell generator is connected to a processor in an interval where there is no valid cell when transmitting a cell from an asynchronous transfer mode (ATM) layer to a physical layer in the Sb and Tb interfaces of the broadband integrated information communication network. Randomly adjust the values to generate unassigned cells.

In general, a broadband integrated telecommunications network consists of 53 octets of asynchronous transfer mode (ATM) cells to accommodate different services, and multiplexes or demultiplexes a cell stream input to each channel to provide a cell environment or SDH. It adopts the transmission method using the physical layer in the environment. In the case of transmitting an Asynchronous Cell to the physical layer, in an interval in which there is no valid cell, the cell is filled with unassigned cells and transmitted as a continuous cell stream. The unassigned cell generator can generate unassigned cells directly from a multiplexer or demultiplexer without using a FIFO structure, thereby reducing the number of unnecessary FIFOs and eliminating the delay structure due to loopback. Generates a cell.

However, the above-described prior art is not applicable to a large-capacity asynchronous delivery mode (ATM) system because it is fixed so as not to configure an asynchronous cell (ATM) cell form including a large amount of routing information, and the user requires Any number of cells can be created, but the speed of the generated cells cannot be controlled, so it is not possible to test the quality of service (QOS) and traffic control functions that are essential for the asynchronous transfer mode (ATM) system. There was a problem.

In order to solve the above problems, the present invention provides asynchronous transmission mode (ATM) traffic generation to generate various types of asynchronous transmission mode (ATM) cells at any shape, any number, and any speed required by a user. An object of the present invention is to provide an apparatus, a method thereof, and a computer-readable recording medium storing a program for realizing the method.

1 is a block diagram of an embodiment of an asynchronous transmission mode (ATM) traffic generation apparatus capable of adjusting the cell generation rate according to the present invention.

2 is a detailed block diagram of an embodiment of a processor connection unit according to the present invention;

3 is a detailed configuration diagram of an embodiment of a cell generation controller according to the present invention.

4 is a flowchart illustrating an embodiment of a method for generating asynchronous transfer mode (ATM) traffic capable of adjusting a cell generation rate according to the present invention.

5 is a structural diagram of an embodiment of a reception direction test cell according to the present invention;

6 is a structural diagram of an embodiment of a transmission direction test cell according to the present invention;

* Explanation of symbols for the main parts of the drawings

11 processor connection unit 12 cell generation control unit

13 physical layer connection 14 switch connection

21: routing tag register 22: header register

23: HEC register 24: Source register

25: destination register 26: payload register

27: cell generation control register 28: byte multiplexer

31: timer 32: register

33: adder 34: comparator

35: byte multiplex controller

The apparatus of the present invention for achieving the above object stores the information related to the cell generation control set to generate cells in any form, any number and at any speed and the information necessary for the cell configuration, Cell generating means for generating cells by multiplexing according to the information selection signal; Cell generation control means for generating an information selection signal to said cell generation means so that a cell can be generated according to the information stored in said cell generation means; Physical layer connection means for generating a connection signal to an external physical layer to transfer a cell generated by said cell generating means to said physical layer; And switch connection means for generating a connection signal to an external switching means and transferring the cells generated by the cell generation means to the switching means.

In addition, the method of the present invention, in the traffic generation method applied to the traffic generating apparatus, information related to cell generation control for generating cells in any form, any number, and any speed and information necessary for cell configuration A first step of starting cell generation according to the cell generation start signal after setting; And generating a cell by generating an information selection signal according to a next cell generation time and reading information related to cell generation control and information necessary for cell configuration.

Meanwhile, the present invention provides a cell generation after setting information related to cell generation control for generating cells in any form, any number, and any speed and information necessary for cell configuration in a traffic generation device having a processor. Starting cell generation according to a start signal; And a computer-readable recording medium having a program for generating a cell for generating an information selection signal according to a next cell generation time, and for reading out information related to cell generation control and information necessary for cell configuration.

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.

1 is a block diagram of an embodiment of an asynchronous transmission mode (ATM) traffic generation apparatus capable of adjusting the cell generation rate according to the present invention.

First, a schematic concept of the present invention will be described.

According to the present invention, since the system of the asynchronous delivery mode (ATM) system is increased in capacity and new service functions are added, any problem required by the user to solve the problems occurring in the existing asynchronous delivery mode (ATM) traffic generating devices is required. To generate asynchronous traffic mode (ATM) traffic at any number, at any number, and at any rate, and to route the cell to a corresponding output port according to routing information of each of the asynchronous cell (ATM) cells. (ATM) layer functions such as switch function, quality of service (QOS), operation and management (OAM) and traffic control, frame and pointer Tests to determine the normal operation of the overall function of the Asynchronous Transfer Mode (ATM) system, such as the physical layer functions related to processing, have not been conducted since system development. So as to be gradually possible to test during the system development By easily verify the problems that appear during the system development at an early stage so that the system can significantly reduce development costs and time.

As shown in FIG. 1, the apparatus for generating an asynchronous delivery mode (ATM) traffic according to the present invention configures an asynchronous delivery mode (ATM) cell by storing values related to cell generation control and information necessary for cell configuration and multiplexing them. Generating a cell selection control unit 12 and a physical layer connection signal S2 for generating a register selection signal S9 so that a cell can be generated according to a condition set in the processor connection unit 11 The physical layer connection part 13 allowing the generated cell S10 to be transmitted to the physical layer processing element and the switch connection part generating the switch connection signal S3 to allow the generated cell S10 to be transmitted to the switch element. (14) is provided.

Next, referring to Figures 2, 3, 5, 6 will be described in detail the configuration of each component as follows.

2 is a detailed block diagram of an embodiment of a processor connector according to the present invention.

The processor connection unit 11 according to the present invention, as shown in Figure 2, the various registers (21 to 27) for storing the values related to the cell generation control and information necessary for the cell configuration from the external processor and their output And a byte multiplexer 28, which multiplexes to form an asynchronous transfer mode (ATM) cell.

That is, the processor connection unit 11 according to the present invention includes the cell generation start (S4), the cell generation period (S5), the number of cell generation (S6), the routing tag size (S7), and the cell generation direction (S11) from an external processor. Cell generation control register 27 for receiving and storing information related to cell generation control such as cell output and routing for receiving and storing routing tag information S12 required for cell configuration from an external processor. Tag register 21, a header register 22 for receiving and storing header information (S13) necessary for cell configuration from an external processor, and outputting the header error control (HEC) information for cell configuration from an external processor ( HEC register 23 for receiving and storing and outputting S14, a source register 24 for receiving and storing cell source information S15 necessary for cell configuration from an external processor, and an external register. A destination register 25 for receiving and storing cell destination information S16 necessary for cell configuration from the processor, and outputting the destination register 25, and a payload register for receiving and storing payload information S17 from an external processor. 26) routing tag information S12 of the routing tag register 21, header information S13 of the header register 22, header error control information S14 of the HEC register 23, and the source register ( Cell source information S15 of 24, cell destination information S16 of the destination register 25, payload information S17 of the payload register 26, and time stamp information of the cell generation control unit 12. And a byte multiplexer 28 configured to output an asynchronous transfer mode (ATM) cell to be generated by multiplexing according to the register selection signal S9 received from the cell generation control unit 12 in sequence (S8). The.

At this time, the generated cell is classified into two types according to the cell generation direction selection signal S11. In the case of the receiving direction, the routing tag is attached as shown in FIG. 5 and according to the routing tag size value. Up to 11 can be attached variably. In the case of the transmission direction, the cell type is a fixed cell type of 53 bytes as shown in FIG. 6 according to the asynchronous transfer mode (ATM) layer and the UTOPIA connection method, which is a physical layer connection standard. At this time, the time stamp value is a timer value S8 at the moment the cell is generated.

3 is a detailed configuration diagram of an embodiment of a cell generation controller according to the present invention.

The cell generation control unit 12 according to the present invention may include a timer 31 that is incremented by a system clock and a register 32 that temporarily stores a timer value at the moment a cell is generated and uses it as a previous cell generation time or time stamp. The adder 33 calculates the next cell generation time S19 by adding the previous cell generation time S8 and the cell generation period value S5, and determines whether the current timer value S18 is the time S19 to generate the cell. When the comparator (B17) and the current timer value (S18) coincide with the time (S19) to generate the cell (S20), the cell generation starts (S4), the number of cell occurrences (S6), the routing tag size (S7), and the cell generation It consists of a byte multiplexing controller (B18) for generating a register selection signal (S9) by using the direction selection signal (S11), the register selection signal (S9) so that a cell can be generated according to the conditions set in the processor connection section (11) Generates.

On the other hand, the physical layer connection unit 13 generates a physical layer connection signal (S2) so that the asynchronous transfer mode (ATM) cell (S10) generated in the processor connection unit 11 can be delivered to the physical layer processing element.

In addition, the switch connection unit 14 generates a switch connection signal S3 so that the asynchronous transfer mode (ATM) cell S10 generated in the processor connection unit 11 can be transferred to the switch element. The generated cell can be delivered in either the receiving direction or the transmitting direction by the cell generation direction selection signal S11 transmitted from the processor connection unit 11, and when the receiving direction is selected, as shown in FIG. The cell of the type with the routing tag S12 attached to the output port is transferred to the switch via the switch connecting portion 14.

4 is a flowchart illustrating an embodiment of a method for generating asynchronous transfer mode (ATM) traffic capable of adjusting a cell generation rate according to the present invention.

First, after the system initialization is completed (41) related to the cell generation control such as the cell generation period (S5), the number of cell occurrences (S6), the routing tag size (S7), the cell generation direction (S11) required for the test target Routing Tag (S12), Header (S13), Header Error Control (HEC) (S14), Cell Source (S15) After setting the cell destination (S16) and the payload (S17) register values (42), cell generation is started through the cell generation start signal S4 (43).

Meanwhile, the time S19 at which the next cell is to be generated is obtained by adding the cell generation period S5 to the time S8 at which the previous cell is generated. When the timer value S18 increases and reaches the next cell generation time S19 (44), a register selection signal S9 is generated. Accordingly, in the transmission direction, the header register 22 except for the routing tag register 21 is generated. When the cell is read in the payload register 17 and the cell is generated in the receiving direction, an asynchronous transfer mode (ATM) cell form from the position corresponding to the routing tag size S7 in the routing tag register 21 to the payload register 26. Read sequentially according to (46, 47). The payload region of the generated cell is filled with the same value by repeatedly reading the payload register 26. After one cell generation is completed, the generation cell count value in the byte multiplexing controller 35 is increased by one and the previous cell generation time S8 is updated to the current timer value S18 (48). When the number of generated cells reaches the cell generation number value S6, the cell generation stops and returns to the initial state, and waits for the cell generation start signal S4. At this time, if the number of occurrences is 0, cells are continuously generated (49 and 50).

The present invention described above is not limited to the above-described embodiments and the accompanying drawings, and various substitutions, modifications, and changes can be made in the art without departing from the technical spirit of the present invention. It will be apparent to those of ordinary knowledge.

As described above, the present invention allows asynchronous transfer mode (ATM) cells of various types to be generated at any type, any number, and at any speed required by the user, thereby increasing the capacity of the asynchronous transfer mode (ATM) device and providing a new service. With the added functions, it is possible to implement various types of traffic with minimum hardware logic that cannot be solved by existing Asynchronous Traffic Mode (ATM) traffic generating devices.

In addition, the present invention can test the connection between the devices inside the asynchronous transfer mode (ATM) system and the protocol operation of each device without expensive test equipment. It can be used even if it cannot be used, so it is possible to easily verify the problems occurring during system development early, which can greatly contribute to the system development cost and shorten the period.

Claims (9)

It stores information related to cell generation control and information necessary for cell configuration that are set to generate cells in any shape, any number and at any speed, and then multiplexes the information according to the information selection signal to generate cells. Cell generating means; Cell generation control means for generating an information selection signal to said cell generation means so that a cell can be generated according to the information stored in said cell generation means; Physical layer connection means for generating a connection signal to an external physical layer to transfer a cell generated by said cell generating means to said physical layer; And Switch connection means for generating a connection signal to an external switching means to transfer the cells generated by the cell generating means to the switching means. Traffic generating device comprising a. The method of claim 1, The cell generating means, A plurality of storage means for receiving information related to cell generation control and information necessary for cell configuration from an external processor to store an asynchronous transfer mode (ATM) cell in any shape, any number and at any speed; And Multiplexing means for generating an asynchronous transfer mode (ATM) cell by multiplexing the information stored in the storage means and the time stamp information of the cell generation control means according to the information selection signal of the cell generation control means Traffic generating device comprising a. The method of claim 2, The plurality of storage means, A cell generation control register for receiving and storing information related to cell generation control such as a cell generation start, a cell generation period, a number of cell generations, a routing tag size, and a cell generation direction from the external processor; A routing tag register for receiving and storing routing tag information necessary for cell configuration from the external processor; A header register for receiving and storing header information necessary for cell configuration from the external processor; A header error control (HEC) register for receiving and storing header error control (HEC) information necessary for cell configuration from the external processor; A source register for receiving and storing cell source information necessary for cell configuration from the external processor and outputting the cell source information; A destination register for receiving and storing cell destination information necessary for cell configuration from the external processor and outputting the cell destination information; And Payload register for receiving and storing payload information from the external processor and outputting the payload information Traffic generating device comprising a. The method of claim 2, The cell generated by the cell generating means, It is transmitted to the physical layer connection means or the switch connection means according to a cell generation direction selection signal from the cell generation control register of the cell generation means, and has a routing tag attached to the output port in the switching means. An asynchronous delivery mode (ATM) cell is a traffic generating device characterized in that it is delivered to the switch connection means. The method according to any one of claims 1 to 4, The cell generation control means, A timer incremented by the system clock; A register for temporarily storing a timer value at the moment a cell is generated and using it as a previous cell occurrence time or time stamp; Addition means for obtaining a next cell generation time by adding a previous cell generation time of the register with a cell generation period value of the cell generation means; Comparison means for comparing whether a current value of the timer is equal to a cell generation time of the addition means; And Multiplexing control means for generating an information selection signal to the cell generating means by using the cell generation start, the number of cell generation, the routing tag size and the cell generation direction selection signal according to the matching signal of the comparison means. Traffic generating device comprising a. In the traffic generating method applied to the traffic generating device, A first step of starting cell generation in accordance with a cell generation start signal after setting information related to cell generation control for generating cells in any form, any number and at any speed, and information necessary for cell configuration; And The second step of generating a cell by generating an information selection signal according to the next cell generation time and reading information related to cell generation control and information necessary for cell configuration Traffic generation method comprising a. The method of claim 6, The first step is, A third step of, when the system is initialized, setting information related to cell generation control such as a cell generation period, a cell generation number, a routing tag size, and a cell generation direction required by a test object; A fourth step of setting a routing tag, a header, a header error control (HEC), a cell source, a cell destination, and a payload register value required for cell configuration; And The fifth step of starting cell generation in accordance with the cell generation start signal Traffic generation method comprising a. The method according to claim 6 or 7, The second step, When the timer value is increased and the next cell generation time is reached, the header information, header error control information, cell source information, cell destination information, payload information, and time stamp information are sequentially read in the transmission direction according to the register selection signal generated. A sixth step of sequentially reading the routing tag information, the header information, the header error control information, the cell origin information, the cell destination information, the payload information, and the time stamp information in the receiving direction to generate an Asynchronous Cell; A seventh step of increasing a generation cell count value and updating a previous cell generation time with a current timer value; And An eighth step of repeating from the sixth step until the number of generated cells becomes the cell occurrence number value Traffic generation method comprising a. In a traffic generating device having a processor, A function of starting cell generation in accordance with a cell generation start signal after setting information related to cell generation control for generating cells in any form, any number and at any speed, and information necessary for cell configuration; And Generates a cell by generating an information selection signal according to the next cell generation time and reading information related to cell generation control and information necessary for cell configuration A computer-readable recording medium having recorded thereon a program for realizing this.