JPH03216749A - Communication control processor - Google Patents

Abstract

PURPOSE:To evade the influence to be given to the reception of data from many other parties despite the increase of quantity of the data received from a specific communication party by providing the received data buffers in response to plural systems respectively. CONSTITUTION:Each of systems A and B of the calling party to which the received data are transmitted is provided with the data reception control means 11 - 1n, the received data buffers 21 - 2n, the busy buffer counter means 31 - 3n, and the data transfer control means 41 - 4n respectively. In such constitution, the data are received from each calling party and transferred to a computer main body. Thus it is possible to evade such detective states where the data buffer is monopolized with the data received from a specific communication party and the obstacle being generated in the reception of data from other communication parties.

Description

[Detailed Description of the Invention] [Summary] A communication control processing device attached to a computer main body that receives data transmitted from a plurality of systems and transfers it to the computer main body. The purpose of this is to prevent the buffer from being monopolized and interfering with data reception from other communication partners.It is attached to a computer and receives data sent from multiple systems and sends it to the computer. In the communication control processing device for transferring, a reception data buffer temporarily holds data received from each of the plurality of systems, and a used buffer count means for indicating the size of the buffer head area in use in each of the reception data buffers. and if it is determined by the corresponding in-use buffer account means provided corresponding to each of the plurality of systems that there is room to hold further received data in the corresponding received data buffer, the corresponding a data reception control means for receiving data from a system and writing it into a corresponding received data buffer; , if it is determined that untransferred received data is held in the corresponding receive data buffer,
and data transfer control means for transferring the untransferred received data to the computer main body.

[Industrial Application Field] The present invention relates to a communication control processing device attached to a computer main body, which receives data transmitted from a plurality of systems and transfers it to the computer main body. In computer systems that have communication functions with other systems,
Some systems are equipped with a communication control processing device for receiving data from other systems according to their respective protocols, assembling the received data into a data message according to the computer main unit's protocol, and transmitting the data message to the computer main unit.

In such communication control processing devices, a part of the memory area is used as a receive data buffer in order to perform the above processing and wait for other processing on the computer side. Computer systems such as these tend to communicate with a large number of parties, and technology is needed to ensure that even if the amount of data processed from a particular communication party increases, it does not affect the reception of data from many other parties. was requested.

[Prior art and problems to be solved by the invention] Conventionally, in the communication control processing device as described above, a data buffer area is provided in the memory area, but the entire data buffer area is Because the data buffer can be used without limit for data received from a specific communication partner, the data buffer area becomes depleted due to monopolization of the data buffer by data received from a specific communication partner, which hinders the reception of data from many other communication partners. There was a problem with coming. The present invention has been made in view of the above-mentioned problems, and is a communication control processing device in which the data buffer is monopolized by data received from a specific communication partner and does not interfere with data reception from other communication partners. The purpose is to provide the following.

[Means to solve the problem]

FIG. 1 is a basic configuration diagram of the present invention, showing the basic configuration of a communication control processing device that is attached to a computer and receives data transmitted from the Duo's system and transfers it to the computer. be.

In FIG. 1, 21 to 2n are reception data buffers, 3
1 to 3n are used buffer counting means, 11 to 1n are reception data control means, and 41 to 4n are data transfer control means.

The reception data buffers 21 to 2n temporarily hold data received from each of the plurality of systems.

The in-use buffer count means 31-3n indicates the size of the in-use buffer area in each of the reception data buffers 21-2n. The data reception control means 11 to 1n are provided corresponding to each of the plurality of systems, and the corresponding in-use buffer counting means determines that the corresponding reception data buffer has room to hold more reception data. If so, receive data from the corresponding system and write it to the corresponding receive data buffer.

The data transfer control means 41 to 4n are provided corresponding to each of the plurality of systems, receive transfer permission from the computer main body, and use the corresponding in-use buffer counting means to add untransferred received data to the corresponding reception data buffer. If it is determined that the data is retained, the untransferred received data is transferred to the computer main body. [Operation] In the communication control processing device of the present invention, for each system to which received data is transmitted, a received data buffer, a busy buffer count means, a received data control means, and
A data transfer control means is provided to receive data from each partner system and transfer data to the computer main body. In particular, the receive data buffer 21~
2n is provided corresponding to each of a plurality of systems, so the amount of data received from a specific system may increase, or the processing in the computer main unit may become stagnant regarding data received from a specific system. processing of data received from other systems.

〔Example〕

FIG. 2 is a diagram showing the overall configuration of a system to which the present invention is applied.

In FIG. 2, Y is a system equipped with a communication control processing device of the present invention, and A, B, C, and D are respectively
A communication partner system, 1 is a communication control processing device of the present invention,
2 is an operating system, 3 is a data transmission/reception unit,
4 is a protocol control section, 5 is a data transfer section, and 6 is a computer main unit.

Although not shown, the communication control processing device of the present invention, like known communication control processing devices, is equipped with an MPU, a RAM, a line control LSI, etc., and receives serial data transmitted over the line and converts it into characters. Assemble the C of the computer
The data is passed to the application program on the PU, and conversely, the output of the application program is decomposed into serial data and sent over the line. The data transmitting/receiving section 3 in FIG. 2 includes systems A, B, C,
The data transfer unit 5 is a task that performs data reception processing from D, the data transfer unit 5 is a task that performs data transfer processing to the computer main unit 6, and the protocol control unit 4 is a task that performs data reception processing from D. This is a task that processes the basic functions of. Operating system 2 is
It controls the multitasking of the above-mentioned tasks, and in particular distributes the receive buffer area of the memory according to the invention as described below.

FIG. 3 is a diagram showing an example of area allocation for data from each communication partner system in the reception data buffer area of the memory of the communication control processing device according to the embodiment of the present invention.

As shown in FIG. 3, the area allocated as the reception data buffer area in the memory (RAM) is divided in advance corresponding to systems A, B, C, and D that receive data. . . . are (in this example) blocks each consisting of 256 bytes. Therefore, in this example, a receive data buffer area of 10×256 bytes is allocated to each system A, B, C, and D, respectively. In Figure 3,
The reason why the area allocated to each system is divided into three blocks by broken lines corresponds to the fact that in this example, three blocks of data can be received by one continuous communication process from each system. It is.

The above allocation can be done by giving the number of systems transmitting data to be received, the amount of data received from each system in one continuous communication process, etc. during IPL, etc. This is done by the operating system 2 mentioned above. That is, memory (
RAM), an area excluding areas used for other purposes is allocated as a receive data buffer area (for example, 40 x 256 bytes in the example shown in Figure 3), and this receive data buffer area is used for systems A, B, C, Then, by dividing D by the number 4, the total number of reception buffers (blocks) corresponding to each system is determined as 40÷4=10. Since the amount of data to be received is 3 blocks, the total number of reception buffers (blocks) above is 10.
Since it is only possible to write data that is received from the corresponding system through up to three consecutive communication processes, the maximum number of receive buffer areas (blocks) that can actually be used is 3X3=9 (blocks).
seek.

The total number of reception buffers (blocks) and the maximum number of reception buffer areas (blocks) mentioned above are determined for each system, and as shown in FIG. They are stored in BTCT and DT, respectively.

FIG. 4 is a diagram showing the contents of the node-specific control table in the embodiment of the present invention.

As shown in Figure 4, the node-specific control table corresponding to each system is based on the total reception buffer (block)
The counter value of the data buffer in use counter, which stores the maximum number of receive buffer areas (blocks) and indicates how much of the receive data buffer area allocated to each system is being used. ,
and the address of the memory where the next received data should be stored in the receive data buffer area corresponding to each system, and the receive buffer link (address ) is maintained.

FIG. 5 and FIG. 6 are diagrams showing control procedures in an embodiment of the present invention.

FIG. 5 is a diagram showing a control procedure in the protocol control section 4 of the communication control processing device of the present invention when the data transmission/reception section 3 receives received data.

When the received data is received in step 60 of FIG. 5, it is determined in step 61 whether or not normal data has been received, and if there is an abnormality, an error notification is sent in step 62 and the abnormality is detected. If there is no free space, in step 63, the node control table is searched based on the contents of the received data to determine whether there is space in the received data buffer. In step 64, if there is no free space in the receive data buffer as a result of the above search, in step 65, a busy process is performed to indicate that data cannot be received only for the corresponding system, and in step 64, there is no free space in the receive data buffer. If so, in step 66 it is determined whether the data transfer request has been transferred to the data transfer unit 5.

If the data transfer request has not been transferred in step 66, the data transfer request is transferred to the data transfer unit 5 (through inter-task communication) in step 67, and if the data transfer request has been transferred in step 166, step 68 Then, the above-mentioned accepted data is received and stored in the reception data buffer at the address following the reception data written immediately before, and the process is completed.

When the data transfer unit 5 receives the above data transfer request,
A transfer request is output to the main device 6, and in response to this, the main device 6 returns a transfer permission signal if it is in a state where data can be accepted.

The data transfer unit 5 does not send a reply to the protocol control unit 4 until it receives the transfer permission signal, and when it receives the transfer permission signal, it does not send a reply to the protocol control unit 4 ) sends a receive request.

FIG. 6 is a diagram showing a control procedure when the protocol control section 4 receives the above reception request from the data transfer section 5. When a reception request is accepted in step 70 of FIG. 6, it is determined in step 71 whether the request is normal or not. If there is an abnormality, an error notification is sent in step 72, and if there is no abnormality, In step 73, the node control table is searched based on the request contents, and it is determined whether there is any data that has not been transferred to the main device 6 in the received data buffer. In step 74, if there is no untransferred data in the received data buffer as a result of the above search, the process ends in step 75, and if in step 74 there is untransferred data in the received data buffer, the process proceeds to step 76. and sends the above data to the data transfer unit 5 (
(in the order received) via inter-task communication. Upon receiving this data transfer, the data transfer unit 5 further transfers this data to the main device 6.

In step 77, it is determined whether or not the reception data buffer is in a busy state due to the above transfer, and if so, the busy state is canceled in step 78.

In step 79, it is determined whether there is further untransferred data in the reception data buffer. If there is untransferred data, in step 80, the data transfer unit 5 is sent (via inter-task communication). ) Transfer the data transfer request and end the process.

Through the above processing, each system A, B, C, and D
As long as there is space in the receive data buffer allocated for each system, the data received from
The data is stored in each buffer in order, and if there is no free space, busy processing is performed, and as long as there is untransferred data in the receive data buffer allocated for each system, the data is transferred to the main unit via the data transfer unit. Each time a request is sent and the main device permits transfer, the untransferred data is transferred to the main device.

Therefore, the received data from each system is
The use of the receive data buffer is not affected by the receive data buffer usage status of receive data from other systems.

〔Effect of the invention〕

According to the communication control processing device of the present invention, it is possible to prevent a data buffer from being monopolized by data received from a specific communication partner, thereby preventing data reception from other communication partners from being hindered.

[Brief explanation of drawings]

FIG. 1 is a basic configuration diagram of the present invention. FIG. 2 is a diagram showing the overall configuration of a system to which the present invention is applied. FIG. 3 is a reception data buffer area of the memory of a communication control processing device according to an embodiment of the present invention. FIG. 4 is a diagram showing an example of area allocation for data from each communication partner's system in the embodiment of the present invention, and FIGS. The figure is a diagram showing a control procedure in an embodiment of the present invention. [Explanation of symbols] 11 communication control processing device of the present invention, 2-operating system, 3-data transmission/reception section, 4-protocol control section, 5-data transfer section, 6...-computer main unit, 11-In - Reception data control means, 21 to 2n - reception data buffer, 31 to 3n - busy buffer counting means, 41 to 4n - data transfer control means. System A System B Invention σ No. 1) Basic configuration diagram 1 Figure 1 System N Diagram showing the overall configuration of the system to which the present invention is applied Figure 2 System D System D Y-Fist System Y 1 Communication processing FIG. 5 is a diagram showing the control procedure at the time of reception of received data in the embodiment of the present invention.

Claims (1)

[Claims] The computer main body (6) is attached to the computer main body (6) and receives data transmitted from a plurality of systems.
), in the communication control processing device, a reception data buffer (21 to 2n) temporarily holds data received from each of the plurality of systems, and a buffer in use in each of the reception data buffers (21 to 2n). In-use buffer count means (31 to 3) indicating the size of the area
n) If it is determined by the corresponding in-use buffer counting means provided corresponding to each of the plurality of systems that there is room to hold further received data in the corresponding received data buffer, a data reception control means (11 to 1n) that receives data from a corresponding system and writes it into a corresponding reception data buffer; and a data reception control means (11 to 1n) that is provided corresponding to each of the plurality of systems and that receives transfer permission from the computer main body (6). If it is determined by the corresponding in-use buffer counting means that untransferred received data is held in the corresponding receive data buffer, the untransferred received data is transferred to the computer main body (6). A communication control processing device comprising: data transfer control means (41 to 4n) for transferring data.