JP3550634B2 - Memory link data communication method and device - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a memory link data communication method and apparatus for performing memory link data communication on a network, and more particularly, to a memory link data communication capable of performing memory link data communication without limiting the memory link capacity in the network. The present invention relates to a data communication method and apparatus.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, a memory link data communication method is known as a method of performing communication on a network such as a local area network.
[0003]
FIG. 2 shows a schematic configuration of a communication system configured by employing a conventional memory link data communication system. In this communication system, a plurality of stations 1 to N connected to a transmission line 10 communicate with each other. Each of the stations 1 to N has the same memory link data area having a fixed area corresponding to each station. 1-1 to 1-N.
[0004]
Each of the stations 1 to N communicates with another station via the memory link data stored in each of the memory link data areas 1-1 to 1-N.
[0005]
That is, in the communication system configured by adopting the conventional memory link data communication method, as shown in FIG. 3, first, in order to speed up the reception processing, the communication processing units 11 of the stations 1 to N First, all the memory link data from all the stations are unconditionally received, and the received memory link data from all the stations are stored in each station fixed area of the memory link data area 12 of the station.
[0006]
After the storage of the memory link data from all the stations in each station fixed area of the memory link data area 12 is completed, the application unit 13 of the station concerned stores the memory link data stored in each station fixed area of the memory link data area 12. The application is executed by copying necessary data from the data to the application memory link data storage area 14.
[0007]
[Problems to be solved by the invention]
However, in the communication system configured by adopting the conventional memory link data communication method, each station unconditionally transmits the memory link data of all the stations existing on the network, that is, the communication path 10 to the communication processing unit 11. , And is stored in the memory link data area 12 of the station. Therefore, as the memory link data area 12 of each station, a reception buffer capable of storing memory link data of all stations, that is, It is necessary to secure the memory link data area 12, and for this purpose, there is no other way but to adjust the receiving capability of each station to a station having the smallest memory capacity of the memory link data area 12 among the stations joining this network. .
[0008]
For this reason, each station is physically limited by the memory capacity, and has a problem that the memory link capacity in the network is limited.
[0009]
SUMMARY OF THE INVENTION It is an object of the present invention to provide a memory link data communication method and apparatus capable of performing memory link data communication without limiting the memory link capacity in a network.
[0010]
[Means for Solving the Problems]
In order to achieve the above object, a memory link data communication method according to the present invention comprises:
A memory link data communication method for performing memory link data communication between a plurality of stations existing on a network by receiving memory link data of one station by each of the other stations ,
Each of the plurality of stations includes a communication processing unit that receives memory link data from another station, a buffer that temporarily stores the memory link data received by the communication processing unit, and a memory link from the other station. Select information indicating whether or not it is necessary to capture data when executing an application in the station, a select information storage unit pre-stored corresponding to each station, and the buffer based on the select information in the select information storage unit. An application unit that captures only the memory link data that needs to be captured among the memory link data temporarily stored in, and executes a predetermined application based on the data.
In each of the above stations, the memory processing unit receives memory link data from another station,
The received memory link data is temporarily stored in a buffer,
When the reception of the memory link data for one station is completed, each time a reception completion notification is sent to the application unit,
The application unit determines whether or not it is necessary to capture the memory link data temporarily stored in the buffer based on the select information in the select information storage unit by the reception completion notification, and buffers only the memory link data from the necessary station. It is characterized by taking in from.

[0011]
Preferably, the reception completion notification is made by a message transmitted from the buffer to the application unit .

[0012]
Preferably, the reception completion notification is issued by an interruption from the buffer to the application unit .

[0013]
Further, in order to achieve the above object, a memory link data communication device according to the present invention,
A memory link data communication device that performs memory link data communication by receiving memory link data of one station by another station among a plurality of stations existing on a network,
Each of the above stations is
A communication processing unit that receives memory link data from another station and, upon completion of reception of one station of memory link data, notifies a completion of reception each time ;
A buffer for temporarily storing the memory link data received by the communication processing unit,
Select information indicating whether or not it is necessary to take in memory link data from the other station when executing an application in the station, a select information storage unit pre-stored corresponding to each station,
Based on the select information in the select information storage unit, it is determined whether or not it is necessary to capture the memory link data temporarily stored in the buffer according to the reception completion notification from the communication processing unit. Only from the buffer, an application unit for executing a predetermined application by the captured data ,
It is characterized by having.

[0014]
Also, the buffer is
The buffer is released by discarding unnecessary memory link data,
The opened buffer may be reused for storing the memory link data newly received by the communication processing unit .

[0015]
In addition, the application section,
The memory link data fetched from the buffer is copied to the memory link data storage area for the application, or the start address of the memory link data and the information of the data length are stored, so that the application is executed. You may comprise.

[0016]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
[0017]
FIG. 1 is a schematic block diagram showing a processing configuration of each station of a communication system configured by applying the memory link data communication method and device according to the present invention.
[0018]
In FIG. 1, in each station of this communication system, the communication processing unit 21 receives the memory link data of another station from the transmission line 10 shown in FIG. 2, and recycles the received memory link data of the other station. The data is temporarily stored in an empty data buffer of the buffer 22.
[0019]
Then, each time the reception (for one station) of the memory link data is completed, a reception completion notification indicating that the reception of the memory link data is completed is sent to the application unit 23 each time.

[0020]
This reception completion notification can be performed by, for example, notifying or interrupting a message to the application unit 23.
[0021]
The application unit 23 is started by the reception completion notification that is notified each time the reception (for one station) of the memory link data is completed, and the memory link data temporarily stored in the recycle buffer 22 is stored in the memory of the required station. Judge whether the data is link data or not, and fetch only the memory link data of the required station. That is, each time the reception of the memory link data for one station is completed, the application unit 23 determines whether or not the received memory link data is the memory link data of the required station. If there is, capture it, otherwise do not.

[0022]
The fetching of the memory link data from the recycle buffer 22 by the application unit 23 is performed based on the select information set in the select information storage unit 25 in advance.
[0023]
That is, select data indicating “necessary” or “unnecessary” is stored in advance in the select information storage unit 25 corresponding to each station, and the application unit 23 stores in the memory of each station stored in the select information storage unit 25. determines link or data necessary or unnecessary, out of the memory link data stored in the recycle buffer 22 takes only a memory link data required station.
[0024]
The memory link data fetched from the recycle buffer 22 by the application section 23 is copied to the application memory link data storage area 24 by the application section 23 or information such as the head address of the memory link data and the data length is stored. Then, the application unit 23 executes the application.
[0025]
Here, the select data stored in the select information storage unit 25 is not limited to the select data indicating “necessary” or “unnecessary” corresponding to each station. For example, a group address that bundles a plurality of stations, for example, one that is identified by using the upper bits of each station address, and the other that corresponds to each station by using other information included in the received memory link data, It may be configured to identify “unnecessary”.
[0026]
In the recycle buffer 22, after the required memory link data is used by the application unit 23, or the memory link data determined to be unnecessary is discarded by the application unit 23, and the memory link data is stored. The data buffer of the recycled buffer 22 is released.
[0027]
The released data buffer of the recycle buffer 22 is returned to the communication processing unit 21 again, and is used again for receiving the memory link data of another station from the transmission line 10 shown in FIG.
[0028]
According to the above configuration, the data buffer of the recycle buffer 22
1) For receiving the memory link data by the communication processing unit 21 2) For the spare 3) At least three for processing by the application unit 23 may be provided.
[0029]
The application memory link data storage area 24 of each station can be set according to the capacity of the physical memory of each station.
[0030]
Thus, memory data communication can be performed without the memory capacity of each station being affected by the memory link data capacity of the entire network.
[0031]
【The invention's effect】
As described above, according to the first to third aspects of the present invention, in a memory link data communication method for performing memory link data communication by transmitting memory link data between a plurality of stations on a network, each station includes: The memory link data received from the other station is stored in the buffer, and a reception completion notification is sent to the application unit upon completion of the reception of the memory link data. The application unit responds to the reception completion notification, and Since only the necessary memory link data is fetched from the buffer, memory data communication can be performed without affecting the memory capacity of each station by the memory link data capacity of the entire network.
[0032]
According to the invention of claims 4 to 6, in a memory link data communication apparatus for performing memory link data communication by transmitting memory link data between a plurality of stations on a network, each station is connected to another station. A communication processing unit for receiving the memory link data from the station, a buffer for temporarily storing the memory link data received by the communication processing unit, and a buffer for receiving the memory link data from the buffer that indicates completion of reception of the memory link data; And an application unit for executing a predetermined application by fetching necessary memory link data from the network. The present invention can provide a memory link data communication device for performing the above.
[Brief description of the drawings]
FIG. 1 is a schematic block diagram showing a processing configuration of each station of a communication system configured by applying a memory link data communication method and device according to the present invention.
FIG. 2 is a block diagram showing a schematic configuration of a communication system configured by employing a conventional memory link data communication system.
FIG. 3 is a schematic block diagram showing a processing configuration of each station of the communication system shown in FIG. 1;
[Explanation of symbols]
1 to N stations 1-1 to 1-N Memory link data area 11 Communication processing unit 12 Memory link data area 13 Application unit 14 Application memory link data storage area 21 Communication processing unit 22 Recycle buffer 23 Application unit 24 Application memory link Data storage area 25 Select information storage unit

Claims (4)

A memory link data communication method for performing memory link data communication between a plurality of stations existing on a network by receiving memory link data of one station by each of the other stations ,
Each of the plurality of stations includes a communication processing unit that receives memory link data from another station, a buffer that temporarily stores the memory link data received by the communication processing unit, and a memory link from the other station. Select information indicating whether or not it is necessary to capture data when executing an application in the station, a select information storage unit pre-stored corresponding to each station, and the buffer based on the select information in the select information storage unit. An application unit that captures only the memory link data that needs to be captured among the memory link data temporarily stored in, and executes a predetermined application based on the data.
In each of the above stations, the memory processing unit receives memory link data from another station,
The received memory link data is temporarily stored in a buffer,
When the reception of the memory link data for one station is completed, each time a reception completion notification is sent to the application unit,
The application unit determines whether or not it is necessary to capture the memory link data temporarily stored in the buffer based on the select information in the select information storage unit by the reception completion notification, and buffers only the memory link data from the necessary station. A memory link data communication method characterized by taking in from a memory. A memory link data communication device that performs memory link data communication by receiving memory link data of one station by another station among a plurality of stations existing on a network,
Each of the above stations is
A communication processing unit that receives memory link data from another station and, upon completion of reception of one station of memory link data, notifies a completion of reception each time ;
A buffer for temporarily storing the memory link data received by the communication processing unit,
Select information indicating whether or not it is necessary to take in memory link data from the other station when executing an application in the station, a select information storage unit pre-stored corresponding to each station,
Based on the select information in the select information storage unit, it is determined whether or not it is necessary to capture the memory link data temporarily stored in the buffer according to the reception completion notification from the communication processing unit. Only from the buffer, an application unit for executing a predetermined application by the captured data ,
A memory link data communication device, comprising: The above buffer is
The buffer is released by discarding unnecessary memory link data,
3. The memory link data communication device according to claim 2, wherein the released buffer is reused for storing the memory link data newly received by the communication processing unit. Each of the plurality of stations includes an application memory,
  The above application section,
  Copying the memory link data fetched from the buffer into the link data storage area of the application memory, or storing information on the start address of the memory link data and its data length.
  The memory link data communication device according to claim 2, wherein:

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