JPH10271127A - Data exchange system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a data exchange system which can flexibly deal with the change of exchange data or the exchange of data with plural physical interface modules as objects as well. SOLUTION: When a state hold part 45 is in a 'write enabled state', a data sending part 42 receiving exchange data to be sent from a control part 41 of interface module 40 to a physical interface module 50 writes these exchange data in a specified format into a communication memory (CM) 60 and sends out 'CM write end interruption' to the physical interface module 50. A data reception part 54 of physical interface module 50 receiving the 'CM write end interruption' reads these exchange data out of the CM 60 and dispatches them to a control part 51, and the 'CM write end interruption' is sent out to the interface module 40.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a data transfer system for transferring data between interface modules having different CPUs using a communication memory in an interface package used for a communication device constituting an ATM switching network. .

[0002]

2. Description of the Related Art Today, ATM (Asynchronous Transfar
Mode) Although communication technology has been remarkably developed, some communication devices constituting a switching network using this ATM technology have different CPUs.
By implementing an interface package including, for example, two interface modules having communication and a communication memory provided between the modules, various functions and operations are realized by transferring data between the interface modules via the communication memory. Things are known.

FIG. 5 is a diagram showing a schematic configuration of an interface package 100 in a conventional communication device of this type, and includes an interface module 10 having a control unit 11 composed of an upper CPU and a physical module having a control unit 21 composed of a lower CPU. It comprises an interface module 20, and a communication memory 30 provided between the two modules 10, 20.

In the interface package 100, in order to exchange data between the interface modules 10 and 20, mapping is performed on the communication memory 30 from the data transmission side, and access to the communication memory 30 is performed for each type of exchanged data. By negotiating the address and data format,
Basically, the exchange data is presented to the data receiving side in the form of a hardware register.

For example, when data is transmitted from the interface module 10 to the physical interface module 20, first, the control unit 11 of the interface module 10, which is the transmitting side, transmits the data on the communication memory 30 assigned from the type of data to be transmitted / received. Refer to the access address and check the status bit provided in the data format. This status bit indicates whether or not there is data to be transmitted and received. In the writable state, the control unit 11 writes data in accordance with a predetermined data format, and sets the status bit to a write disabled state.

On the other hand, in the physical interface module 20 on the receiving side, the control unit 21 refers to the access address in the communication memory 30 assigned from the type of data to be received and checks the status bit. I do. Here, if the status bit is in a write-disabled state, the control unit 21 determines that there is exchanged data, reads the exchanged data from the access address according to the data format, and sets the status bit to a writable state.

Similarly, the physical interface module 2
0 to the interface module 10, the communication memory
Data transmission and reception are performed while determining the access address on 0 and the data format.

As described above, in the conventional data transfer method,
Since the access address and data format on the communication memory were determined for each type of data, the access address and data format had to be changed each time the data was added or changed. A lot of processing load is added to both the receiving module and the data receiving module.

[0009]

As described above, in the conventional data transfer method, the data format on the communication memory is physically determined between the data sending module and the data receiving module.
When the exchanged data is changed, it affects a wide area on the communication memory, and both the data transmission side module and the data reception side module have to cope with each case, and there is a problem that the flexibility of the exchanged data change is lacking.

[0010] Further, in the case of exchanging data with a plurality of physical interface modules using one interface module, even if the same exchanging data is used, the data is transmitted because the access address on the communication memory and the data format are different for each physical interface module. In this case, a process of determining an access address and a data format to be referred to from the type of the physical interface module is further required, and there is a problem that control becomes complicated.

The present invention eliminates the above-mentioned problems, and enables data transmission and reception between a data sending module and a data receiving module without complicated processing such as deciding an access address and a data format on a communication memory. It is an object of the present invention to provide a data transfer method that can flexibly respond to change of transfer data and data transfer for a plurality of physical interface modules.

[0012]

SUMMARY OF THE INVENTION The present invention provides at least two
In a data transfer method in which data is transferred between shared control modules via a shared memory, the transferred data is written to the shared memory based on a transfer request of the transferred data, and after completion of writing, written to the opposing data receiving module. Data sending means for sending an end interrupt, and data for sending the read / received data from the shared memory by receiving the write end interrupt, and sending a read end interrupt to the opposing data sending module after reading is completed. Receiving means, and a state management unit for performing a management of a state regarding whether or not the transfer data can be read from the shared memory or whether the transfer data can be written to the shared memory according to a reception result of the write end interrupt or the read end interrupt. Means and the state managed by the state management means. A state holding means for each of the control modules, and unifying the basic data format handled by each of the control modules, permitting the data receiving module to read out the exchanged data in response to the write end interrupt, Data transmission / reception is performed without considering the state of the data reception-side module from the data transmission-side module, while permitting writing of transmission / reception data in the data transmission-side module in response to the read end interrupt.

Preferably, in the present invention, the control module is at least two types of interface modules having different CPUs in an interface package mounted on a communication device constituting an ATM switching network, and the shared memory is provided in the interface package. A communication memory disposed between the interface modules.

[0014]

Embodiments of the present invention will be described below in detail with reference to the accompanying drawings. FIG. 1 shows an interface package 2 according to an embodiment of the present invention.
It is a block diagram which shows the function structure of 00. The interface package 200 includes an interface module 40 having an upper CPU, a physical interface module 50 having a lower CPU, and both of these modules 40 and 50.
It comprises a communication memory 60 provided therebetween.

The interface module 40 includes a control unit 41 as a high-order CPU, a data transmission unit 42, a state management unit 43, a data reception unit 44, and a state holding unit 45. The physical interface module 50 includes a control unit 51 as a lower CPU, a data transmission unit 5
2, a state management unit 53, a data reception unit 54, and a state holding unit 55 are provided.

The detailed configurations of the data sending section 42 and the data receiving section 44 among the components on the interface module 40 side are shown in FIGS. 2A and 3B, respectively. That is, the data transmission unit 42 on the interface module 40 side includes a transmission data holding area 420, a transmission unit activation unit 421, and a transmission unit 422, and the data reception unit 44 includes a reception unit 440, a control unit activation unit 441, and a reception data retention area. 442.

The physical interface module 50
The detailed configuration of the data sending unit 52 and the data receiving unit 54 among the components on the side of FIG.
It is shown in (b). That is, the data transmission unit 52 of the physical interface module 50 includes a transmission data holding area 520, a transmission unit activation unit 521, and a transmission unit 522, and the data reception unit 54 includes a reception unit 540, a control unit activation unit 541, and a reception data retention unit. The region 542 is configured.

Further, the state holding unit 45 on the interface module 40 side and the physical interface module 50
4A and 4B, respectively.
As shown in (b), a communication memory state holding area 450 and a communication memory state holding area 550 are provided.

Hereinafter, the interface package 20
The operation of 0 will be described. First, data transfer from the interface module 40 to the physical interface module 50 is handled as follows. At this time, the data transmission unit 42 on the interface module 40 side
The operation image of the data receiving unit 54 of the physical interface module 50 is as shown in FIG. Also,
At this time, the operation images of the state management unit 43 and the state holding unit 45 on the interface module 40 side and the state management unit 53 and the state holding unit 55 on the physical interface module 50 side are shown in FIGS. 4A and 4B, respectively. The state is as shown in FIG.

First, in the control unit 41 of the interface module 40, the physical interface module 5
When it is necessary to send data to the control unit 51 on the 0 side, the control unit 41 sends a data sending request to the data sending unit 42 and sends the data to be sent (transmission / reception data) to the sending data of the data sending unit 42. Register in the holding area 420.

The data transmitting section 42 receives the data transmission request transmitted from the control section 41 and transmits the data to the transmitting section starting section 42.
1, a start signal is output, and the sending unit 422 is started by the start signal, and checks the state held in the communication memory state holding area 450 of the state holding unit 45.

Here, when it is determined that the state of the communication memory 60 is the "writable state",
The sending unit 422 deletes the exchange data from the transmission data holding area 420 and writes the exchange data in the communication memory 60 according to a predetermined format.

Here, as the predetermined format, it is assumed that the same data format as that used when registering transfer data from the control unit 41 to the data transmission unit 42 as described above. Thus, in the present invention, the data transmission / reception unit 42 can write the received / received data received from the control unit 41 into the communication memory 60 as it is.

When the writing of the exchange data is completed, the sending unit 422 rewrites the state of the communication memory state holding area 450 of the state holding unit 45 to the “write-disabled state”, and sends the “physical interface module 50 side” Communication memory (C
M) Write end interrupt ".

While the state of the communication memory state holding area 450 of the state holding unit 45 is in the “writable state”, data transmission from the data transmitting unit 42 is prohibited, and thereafter, the data is rewritten to the “writable state”. Data transmission from the data transmission unit 42 becomes possible.

The management of the state of the communication memory state holding area 450 of the state holding unit 45 is performed by the state management unit 4.
3. That is, the state management unit 43
As shown in (a), the state of the communication memory state holding area 450 that is in the “write-disabled state” with the completion of writing of the transfer data from the sending unit 422 to the communication memory 60 is described later from the physical interface module 50. After receiving the “CM read end interrupt” through the process of rewriting, the state is rewritten to the “writable state”, and thereafter, the state in which data can be transmitted from the data transmission unit 42 is established.

On the other hand, the physical interface module 50 on the data receiving side receives the above-mentioned “CM write end interrupt” sent from the interface module 40 on the data transmitting side, so that the receiving unit 540 of the data receiving unit 54 is activated. After the activation, the receiving unit 540 reads the transfer data from the communication memory 60 and controls the control unit 51 on the physical interface module 50 side.
Perform the process of handing over to.

Here, the physical interface module 5
Data formats handled by the control unit 51 on the 0 side include:
The data format is almost the same as the above-mentioned data format handled by the control unit 41 of the interface module 40, and is capable of responding to changes in exchanged data without changing the basic structure.

Due to the relationship between the data format on the data sending side and the data format on the data receiving side, the data receiving unit 54 of the physical interface module 50 on the data receiving side reads out the transmitted / received data from the communication memory 60 as described above, and Specifically, the following processing is performed at the time of handover to 51.

First, in the data receiving section 54, the receiving section 540 reads out the exchanged data from the communication memory 60, and then, in accordance with the relationship between the read out exchanged data and the data to be reset (transferred to the control section 51), A reconstructed version of the exchanged data according to a data format that can be handled by the control unit 51 is registered in the received data holding area 542.

After the completion of the registration process, the receiving unit 540
A “CM read end interrupt” is sent to the interface module 40 side, and then the control unit 51 of the physical interface module 50 is activated via the control unit activation unit 541. After the activation, the control unit 51 receives the exchange data from the reception data holding area 542 of the data reception unit 54, whereby the exchange of data from the interface module 40 to the physical interface module 50 is completed.

Data transfer from the physical interface module 50 to the interface module 40 is performed in the same manner as data transfer from the interface module 40 to the physical interface module 50. At this time, the data transmission unit 5 on the physical interface module 50 side
2 and the operation image of the data receiving unit 44 of the interface module 40 are as shown in FIG.

First, the physical interface module 50
In the control unit 51 on the side, the interface module 4
When it becomes necessary to send data to the control unit 41 on the 0 side, the control unit 51 sends a data sending request to the data sending unit 52 and sends the data (transmission / reception data) to be sent to the sending data of the data sending unit 52. Register in the holding area 520.

The data transmitting section 52 receives the data transmission request transmitted from the control section 51 and transmits the data to the transmitting section activating section 52.
1, a start signal is output, and the sending unit 522 is started by the start signal, and confirms the state held in the communication memory state holding area 550 of the state holding unit 55.

Here, when it is determined that the state of the communication memory 60 is the “writable state”,
The sending unit 522 deletes the exchange data from the transmission data holding area 520 and writes the exchange data in the communication memory 60 according to a predetermined format.

When the writing of the exchange data is completed, the sending unit 522 rewrites the state of the communication memory state holding area 550 of the state holding unit 55 to a “writable state”, and sends the “communication state” to the interface module 40 side. A memory (CM) write end interrupt "is sent.

While the state of the communication memory state holding area 550 of the state holding unit 55 is in the “writable state”, the data sending from the data sending unit 52 is prohibited, and thereafter, the data is rewritten to the “writable state”. Data transmission from the data transmission unit 52 becomes possible.

The management of the state of the communication memory state holding area 550 of the state holding section 55 is performed by the state management section 5.
3. That is, the state management unit 53
As shown in (ba), the state of the communication memory state holding area 550 that is in the “write-disabled state” with the completion of the writing of the transfer data from the sending unit 522 to the communication memory 60 will be described later from the interface module 40. By receiving the “CM read end interrupt” through the processing, the state is rewritten to the “writable state”, and thereafter, the state in which the data transmission unit 52 can transmit data is established.

On the other hand, the interface module 40 on the data receiving side receives the above-mentioned “CM write end interrupt” sent from the physical interface module 50 on the data transmitting side, and thereby the receiving section 440 of the data receiving section 44 is activated. After the activation, the receiving unit 440 reads the above-mentioned transmission / reception data from the communication memory 60, and then transmits the transmission / reception data to the control unit 41 according to the relationship between the read / received data and the data to be reset (transferred to the control unit 41). The reconstructed data according to the data format that can be handled is registered in the reception data holding area 442.

After the completion of the registration process, the receiving unit 440
A “CM read end interrupt” is sent to the physical interface module 50 side, and then the control unit 41 of the interface module 40 is activated through the control unit activation unit 441. After the activation, the control unit 41 receives the exchange data from the reception data holding area 442 of the data reception unit 44, whereby the data exchange from the physical interface module 50 to the interface module 40 is completed.

As described above, in the present invention, the data format on the communication memory 60 is determined by using the existing data format used in the control unit 41 of the interface module 40 and the control unit 51 of each physical interface module 50 and the basic structure. Have the same format, the access address on the communication memory 60 and the data format are common irrespective of the physical interface, and an environment can be constructed in which the interface module 40 does not need to be aware of each physical interface module 50 when sending and receiving data. .

In such an environment, according to the present invention, a CM write end interrupt to the data receiving module accompanying the completion of data writing in the data sending module,
Since the data reading or data writing of the partner module is enabled by using the CM reading end interrupt to the data sending module upon completion of data reading in the data receiving module, it is determined whether or not the transfer data has been written to the communication memory. Unlike the status polling method in which the status is checked by looking at the status information, there is no need to exchange data from the data sending module in consideration of the state of the data receiving module. For example, one interface module can be used for multiple physical interface modules. Also, when data is exchanged, the interface module can exchange data without considering the states of the plurality of physical interface modules one by one.

In the conventional method, the access address and the data format in the communication memory are physically determined. Therefore, when the exchanged data changes, the effect is widespread and it is difficult to cope with the change. By using a data format that has an area that absorbs the difference between the exchanged data and the difference between the exchanged data due to the difference in the physical interface module, there is no physical change, and it is possible to respond with a limited range of changes. It becomes possible to flexibly respond to addition / change of data.

[0044]

As described above, according to the present invention,
After unifying the data format on the shared memory, the data termination module uses the data termination module's write end interrupt to the data reception module and the data reception module's read end interrupt to the data transmission module, and uses the data termination module's Since control is performed so that reading or data writing is possible, data can be sent and received from the data sending module without considering the state of the data receiving module. In the case where data is transmitted and received, the data can be transmitted and received without considering the state of each module on the data receiving side, and control can be simplified.

Also, by unifying the data format, the data area on the format is limited without any physical change, even if there is a change in transmitted / received data or a difference in transmitted / received data due to a difference in the data receiving module. There is an excellent advantage that the change can be absorbed by changing the range, and that it is possible to flexibly cope with the change of the exchanged data and the exchange of data for a plurality of data receiving modules.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a functional configuration of an interface package according to an embodiment of the present invention.

FIG. 2 is a diagram showing an image of a data transfer operation between a data sending unit on the interface module side and a data receiving unit on the physical interface module side in the interface package shown in FIG. 1;

FIG. 3 is a diagram showing an image of a data transfer operation between a data transmission unit on the physical interface module side and a data reception unit on the interface module side in the interface package shown in FIG. 1;

FIG. 4 is a diagram showing an operation image of a state management unit and a state holding unit in the interface module and the physical interface module at the time of data transfer in FIGS. 2 and 3;

FIG. 5 is a block diagram showing the functional configuration of this type of conventional interface package.

[Explanation of symbols]

 Reference Signs List 200 interface package 40 interface module 41 control unit 42 data transmission unit 420 transmission data holding area 421 transmission unit activation unit 422 transmission unit 43 state management unit 44 data reception unit 440 reception unit 441 control unit activation unit 442 reception data retention area 45 state retention Unit 450 communication memory status holding area 50 interface module 51 control unit 52 data sending unit 520 sending data holding area 521 sending unit starting unit 522 sending unit 53 state managing unit 54 data receiving unit 540 receiving unit 541 control unit starting unit 542 receiving data holding Area 55 State holding unit 550 Communication memory state holding area 60 Communication memory (CM)

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Kazuo Fujita 3-1, 1-1 Asahigaoka, Hino-shi, Tokyo Toshiba Communication Systems Engineering Co., Ltd.

Claims (2)

[Claims] In a data transfer method for transmitting and receiving data between at least two types of control modules via a shared memory, based on a request for sending and receiving data, the data is written to the shared memory, and after writing is completed, Data sending means for sending a write end interrupt to the data receiving module to be read; and receiving the write end interrupt to read the exchanged data from the shared memory. Data receiving means for sending a read end interrupt, and whether the read / write data can be read from the shared memory or the written / received data can be written to the shared memory according to a reception result of the write end interrupt or the read end interrupt. Status management means for managing the status, and the status tube A state holding means for holding the state managed by the means is provided for each of the control modules, a basic data format handled by each control module is unified, and transmission and reception by the data receiving module in response to the write end interrupt While permitting data reading and permitting writing of data to be transmitted / received by the data transmitting module in response to the read completion interrupt, data transmission and reception are performed from the data transmitting module without considering the state of the data receiving module. Data transfer method characterized by the following. 2. The control module according to claim 1, wherein the control module is at least two types of interface modules having different CPUs in an interface package mounted on a communication device forming an ATM switching network. 2. A data transfer method according to claim 1, wherein the data transfer method is a communication memory disposed in the communication memory.