KR20010109620A - Method for controlling device board of switch - Google Patents

Abstract

The present invention provides a device for driving the system expansion board 1 (C1, C2, C3), which is a device board without a processor, in a matching exchange subsystem of an electronic switching system connected to an Asynchronous Transfer Mode (ATM) network. In order to control the control boards B1, B2, and B3, the memory 10 in the device control board B1 of the present invention includes a number of regions corresponding to the system expansion boards 1 (C1, C2, and C3). I, II, III, IV are configured, and control signals for controlling the driving of the system expansion boards 1 (C1, C2, C3) are stored in the areas I, II, III, and IV. The device control board B1 of the present invention sequentially reads the control signals stored in the regions I, II, III, and IV of the memory 10, and uses the L bus for system expansion boards 1 (C1, C2). And C3) to control the driving of the system expansion boards 1 (C1, C2, C3).

Therefore, in the present invention, the L bus can be used to easily control the driving of a device board without a processor.

Description

METHOD FOR CONTROLLING DEVICE BOARD OF SWITCH}

The present invention relates to an all-electronic exchange, and more particularly, to a device board driving method of the all-electronic exchange that can control the driving without configuring a processor in the device board.

In an electronic switch that accommodates an Asynchronous Transfer Mode (ATM) network through an x-Digital Subscriber Line (xDSL), a subscriber board must be added to accommodate the increase in the number of subscribers. In this case, a separate system extended board (Extended xDSL Interface Board) to provide an ATM cell provided from one device control board (NICB: Network Interface and Control Board) that controls the operation of the subscriber board to the expanded subscriber board Should be used. On the other hand, the device control board controls the drive of the system expansion board by an internal processor communicating with the system expansion board. However, in order for the system expansion board to communicate with the processor of the device control board, ROM and RAM necessary for driving the processor must be added in addition to the processor for communication, which causes the price of the system expansion board to increase. have.

SUMMARY OF THE INVENTION The present invention has been made to solve such a problem, and an object of the present invention is to provide a method for controlling the operation of the system expansion board with a device control board without configuring a processor in the system expansion board.

In order to achieve the above object, the present invention provides an in-memory area corresponding to device boards, and a method of driving a control board in an electronic switch in which memory signals are connected to control signals for controlling the driving of the device board. Detecting whether the device boards are mounted in an electronic switch; Detecting a memory region corresponding to device boards mounted in the electronic switchboard; Reading the control signal stored in the memory area and providing the device board through the L bus is sequentially provided to the device boards mounted in the electronic switchboard.

1 is a view showing a state in which devices performing a device board control method of an electronic switch according to the present invention are mounted in a plurality of shelves;

2 is a block diagram of a match exchange subsystem for performing a device control method according to the present invention;

3 is a view showing a configuration state of a memory in a device control board for performing a device control method according to the present invention;

4 is a flowchart illustrating a device board control method of an electronic switching system according to the present invention.

<Description of the symbols for the main parts of the drawings>

A1 to A49: Subscriber board B1: Device control board

C1 to C3: Board 1 for system expansion

D1 to D3: Board 2 for system expansion

10: memory

Hereinafter, an embodiment of the present invention will be described in detail.

1 shows a state in which boards are mounted to configure an access switching subsystem (ASS) in an electronic switchboard. As shown, in the present embodiment, four shelves S1-S4 are configured in the matching exchange subsystem, and shelve 1 has device control boards B1 (boards in addition to a plurality of subscriber boards A1-A7). The reason for the configuration of two B1) is for redundancy. In this embodiment, one sign (B1) is used for two boards and the board 1 for system expansion (C1, C2, C3) is mounted. In addition, a matching side board (ESDB Extended STM-1 Daughter Board) (E1) is mounted on the self-s (S2-S4), as shown, for the expansion of one system in addition to the multiple subscriber boards (A29-A49). Board 2 (D1, D2, D3) is mounted, respectively.

Here, the system expansion boards 1 (C1, C2, C3) mounted on the shelf S1 are mounted corresponding to the number of shelves S2, S3, S4 having no device control board B1, and the device control boards. Serves to provide / receive ATM cells provided from (B1) to / from system expansion boards 2 (D1, D2, D3) in self S2, S3, and S4. That is, the subscriber boards A20-A49 may be extended to the self S2, S3, and S4 by the system expansion boards 1 and 2 (C1, C2, C3, D1, D2, and D3). The function of such a structure is mentioned later in detail.

2 shows a functional block diagram of the components mounted in the shelf S1-S4 as described above.

As shown, the matching side board (E1) in the self (S1) is connected to the ATM network, and within the matching exchange subsystem, cells are transferred in synchronous, ie Synchronous Transfer Mode (STM) -1, for matching. The side board (E1) is configured for the matching function between the ATM network and the SRM-1 network.

A device control board (B1) is connected to the matching side board (E1), and the device control board (B1) communicates with the telephony processor (TP) through an HDLC Interface Timeslot (HIT) bus, and matches the ATM cell bus, It performs ATM cell header conversion, ATM traffic management, aggregation function, sub-highway matching function, HIT bus matching function, L bus matching function, ATM layer processing function and Ethernet matching function.

In addition, the device control board (B1) is connected to the subscriber board (A1-A7) in the self (S1) through the L bus or cell bus, and the system expansion boards (C1, C2, C3, D1, D2, D3) Connect the subscriber board (A20-A49) embedded in the self (S2, S3, S4) and the ATM network. That is, the device control board B1 mediates the communication of ATM cells between the ATM network and the subscriber boards A1-A49.

On the other hand, when adding subscriber boards A20-A49 to another self S2 other than the self S1 as described in the above description, the device control board B1 has subscriber boards of the other self S2, S3, and S4. ATM cells with (A20-A49) cannot be arbitrated directly, system expansion boards 1 (C1, C2, C3) and system expansion boards 2 (D1, D2, D3) in self (S2, S3, S4). Should be used. Here, the system expansion board 1 (C1, C2, C3) receives the ATM cell from the device control board (B1) and provides it to the system expansion board 2 (D1, D2, D3), the system expansion board 2 ( It serves to provide ATM cells from D1, D2, and D3 to the device control board B1, where the device control board B1 transmits / transmits the ATM cells to the system expansion boards 1 (C1, C2, C3). In order to receive the ID, the system extension board 1 (C1, C2, C3) must be assigned an ID. Therefore, the system extension board 1 (C1, C2, C3) needs to receive ID information provided from the device control board B1 and initialize the system according to the ID information.

To this end, in the related art, a HIT bus is formed between a system expansion board 1 (C1, C2, C3) and a device control board (B1), and a processor for HIT bus communication in the system expansion board 1 (C1, C2, C3). Was constructed. However, the device control board B1 in the present invention provides the ID information via the system expansion boards 1 (C1, C2, C3) and the L bus by performing the method of the present invention described below, and thus the system expansion board B1. The board 1 (C1, C2, C3) does not need a separate processor.

In the device control board B1, a memory 10 is configured for L bus communication, and an area corresponding to each of the system expansion boards 1 C1, C2, and C3, as shown in FIG. (I, II, III, IV) are formed. In each area (I, II, III, IV) in the memory 10, data (including IDs) for the device control board B1 to provide to the system expansion boards 1 (C1, C2, C3) by address. It is stored.

On the other hand, the cell bus is connected between the device control board (B1) and the system expansion board 1 (C1, C2, C3), the device control board (B1) is a system expansion board 1 (C1, C2, C3) and cells are transmitted / received. The cell bus is connected between the system expansion boards 1 (C1, C2, C3) and the system expansion boards 2 (D1, D2, D3) built in the self-sending (S2, S3, S4). C1, C2, and C3 transmit / receive the system extension board 2 (D1, D2, and D3) and the cells. In the system expansion boards C1, C2, and C3, a matching unit to be transmitted and received through a cell bus must be configured, and the matching unit is driven after the initialization process. In each of the areas I, II, III and IV, control signals for initializing the system expansion boards C1, C2 and C3 should be stored.

On the other hand, the system expansion boards 2 (D1, D2, D3) mounted on the self (S2, S3, S4) are connected to the subscriber boards A20-A49 through the L bus or the cell bus, and its function is self ( It is the same as the device control board B1 mounted in S1), but does not have the ATM cell header conversion function included in the device control board B1. The reason for this is that as a person skilled in the art can easily understand, the device control board B1 converts the header of ATM cells to / from the ATM network appropriately in response to subscribers. As it is provided to the extension board 2 (D1-D4), it does not need a separate header conversion function. These system extension boards 2 (D1-D4) are connected to the subscriber boards A20-A49 of the respective self S2, S3, and S4 through the L bus or the cell bus.

In the matched exchange subsystem having the above-described configuration, the device control board B1 and the system expansion boards 1 C1, C2, and C3 are connected through the L bus, and the device control board B1 is connected through the L bus. ID information is provided to the system extension board 1 (C1, C2, C3). To this end, the device control board B1 should be provided with a method for providing an appropriate (preset) ID corresponding to each system extension board 1 (C1, C2, C3), and the present invention provides such a method.

4 shows a flowchart of a program in which the device control board B1 provides the system expansion boards 1 C1, C2 and C3 with the IDs of the system expansion boards 1 C1, C2, and C3 stored in the memory 10. Is shown.

As shown, when the device control board B1 is initially driven, it is detected whether the system expansion boards 1 C1, C2, and C3 are embedded in the self S1 (step 101). Here, the different logic is controlled when the system extension boards 1 (C1, C2, C3) are mounted in the self S1 and when the subscriber boards are mounted at the position of the system extension boards C1, C2, C3. Note that the match exchange subsystem is configured to be provided to the board B1.

In step 101, after determining whether the system expansion boards 1 (C1, C2, C3) are mounted and the number n thereof, if any system expansion boards 1 (C1, C2, C3) are mounted, Proceed to step 103 (102). In step 103, the device control board B1 is the area of the memory 10 for any one of the system expansion boards 1 (C1, C2, C3) (e.g. C1) of the mounted system expansion boards 1 (C1). I) is detected. The device control board B1 proceeds to step 104 and reads the ID information to be provided to the system expansion board 1 C1 in the detected memory 10 area I, which is then used for system expansion boards. By providing 1 (C1), the hardware configuration for transmitting and receiving ATM cells according to the ID is initialized (setting of a new ID).

Afterwards, the device control board C1 initializes the hardware to transmit / receive the cell with the device control board B1 through the cell bus, that is, the initialization information stored at a predetermined address in the corresponding area I of the system expansion board 1 C1. The initialization process of the device control board B1 is terminated by reading information which can be read and provided to the system expansion board 1 C1 (105).

Steps 103-105 described above are processes in which the device control board B1 provides information in the memory 10 only for the predetermined system expansion board 1 C1, which is mounted in the self S1. This should be done for System Extension Board 1 (C2, C3). That is, the device control board B1 determines whether all system expansion boards 1 (C1, C2, C3) of the self S1 have been initialized in step 106, and thus all system expansion boards 1 (C1). If it has not been done for, C2, C3, the process returns to step 103 and the above process is performed for the uninitialized system expansion boards C2, C3.

In the above description, the device control board B1 is limited to only the initialization process of the system expansion boards 1 (C1, C2, and C3), but the control for controlling the operation of the hardware included in the system expansion board 1 () is performed. By storing the signal in the memory 10 in the device control board B1, it is easy to see that the device control board B1 can control the driving of the system expansion boards 1 C1, C2 and C3 via the L bus. Could be.

In addition, in the above description, the case of the device control board B1 and the system expansion boards 1 C1, C2, and C3 in the matched exchange system have been described. However, the present invention provides a single processor having a processor as described in the claims. Note that the control board can be used to control the driving of device boards without a processor using the L bus.

As described above, in the present invention, the control board having the processor can easily control the driving of the device board without the processor.

Claims (3)

A method of driving a control board in an electronic switch having an in-memory area corresponding to device boards, wherein control signals for controlling driving of the device board are stored in the memory areas. Detecting whether the device boards are mounted in the electronic switchboard; Detecting a memory region corresponding to the device boards mounted in the electronic switchboard; And a step of reading the control signal stored in the memory area and providing the device board via the L bus to the device boards mounted in the electronic switchboard. The method of claim 1, The control board is a device control board of the matched exchange subsystem connected to the ATM network configured in the electronic switchboard, the device board is a device board of the electronic switchboard, characterized in that the system expansion board in the matched exchange subsystem Driving method. The method of claim 2, And a control signal provided by the device control board to the system expansion board comprises an ID signal assigned to the system expansion board.