JP3313655B2 - Data transmission / reception method, data transmission / reception method, and recording medium - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a data transmission / reception system,
The present invention relates to a data transmission / reception method and a recording medium, and more particularly to a data transmission / reception method, a data transmission / reception method, and a recording medium in a connectionless protocol for eliminating data reception omission.

[0002]

2. Description of the Related Art An example of a conventional data receiving apparatus in a connectionless protocol is disclosed in Japanese Patent Laid-Open No. 7-50689.
Gazette ".

[0003] In this conventional method, in order to improve transmission delay, order control and synchronous transfer in a relay device of connectionless protocol communication, a received packet is transferred to a transfer destination by implementing a virtual connection table inside. It relays.

[0004]

A first problem of the above-mentioned prior art is that a packet is missed in communication by the connectionless protocol, and the performance is degraded.

When the operating system receives a connectionless protocol packet, the operating system delivers the packet to an application program that has issued a receive command to the source address. At this time,
If the receiving instruction has not been issued from the application program, the operating system discards the received packet.

The application program transmits a packet to a communication partner and issues a reception command to receive a response. At this time, if the load on the own machine is high, a response packet may be returned before the reception command is queued in the operating system. In this case, since the operating system discards this packet, the application program detects omission of reception when the reception command ends abnormally due to timeout. The application program retransmits the previously transmitted data to the communication partner and receives a response again. As a result, the response becomes poor.

SUMMARY OF THE INVENTION It is an object of the present invention to eliminate omission of data reception in an application program in reception of a connectionless protocol and prevent deterioration of response.

[0008]

According to a first data transmission / reception method of the present invention, an operating system and an application program are provided, and an input command for receiving received data corresponding to transmission data is first transmitted to the operating system. And an application program for executing an output instruction for passing the transmission data to the operating system, and holding the input instruction received from the application program in an instruction queue, and then transmitting the transmission instruction received from the application program. Send the data to the other system,
And receiving the received data corresponding to the transmitted transmission data from the partner system and storing the received data according to a corresponding input command in the command queue in a predetermined area of the application program. .

A second data transmission / reception method according to the present invention is the first data transmission / reception method, wherein after storing the received data in a predetermined area of the application program, an interrupt for processing the received data is provided. In accordance with the input command.

A first data transmission / reception method of the present invention has an operating system and an application program, wherein the application program first transmits an input instruction for receiving received data corresponding to transmission data to the operating system, Next, an output instruction for passing the transmission data to the operating system is executed, and the operating system holds the input instruction received from the application program in an instruction queue, and then executes the transmission instruction received from the application program. When the data is transmitted to the partner system and the received data corresponding to the transmitted data is received from the partner system, the received data received according to the corresponding input command in the command queue is received. Stored in a predetermined area of the application program.

A second data transmission / reception method according to the present invention is the first data transmission / reception method, wherein the operating system stores the received data in a predetermined area of the application program, An interrupt for processing is issued to the application program according to the input instruction.

According to a third data transmission / reception method of the present invention, an application program including an output command, an input buffer, an input command, an input command interrupt processing unit and an output buffer, an output command processing unit, an input command processing unit, and an input command queue And an operating system including an interrupt processing unit, the output buffer storing transmission data to be transmitted to the partner system, and transmitting the transmission data stored in the output buffer to the partner system. The output instruction instructing the output instruction processing unit, the identification address for identifying the partner system, the address of the input buffer, and the entry number for storing the address indicating the corresponding interrupt processing routine of the input instruction interrupt processing unit are stored in the operating system. Said input instruction to instruct the system, The input buffer in which the received data received from the partner system is stored from the input command processing unit, and the address of the interrupt processing routine for the received data in the input buffer received from the partner system is held in each entry and an interrupt is generated. An input instruction interrupt processing unit that performs a process of jumping to a processing routine, an input instruction queue that stores the input instruction from the application program as a queue, and the transmission data in the output buffer according to an instruction of the output instruction. The output command processing unit for transmitting to the partner system,
Receiving the received data from the partner system, storing the received data in the input buffer in accordance with the instruction of the input command corresponding to the received data in the input command queue, and sending the application program to the interrupt processing unit. An input instruction processing unit that instructs to issue an interrupt, and issues an interrupt to the application program in accordance with the instruction of the input instruction processing unit;
And an interrupt processing unit that transfers control to the input instruction interrupt processing unit of the application program.

A third data transmission / reception method according to the present invention uses an operating system having an input command queue, an output buffer for storing transmission data, and an input buffer for storing reception data, and the transmission data to be transmitted to a partner system. In the output buffer; and a second step of issuing an instruction to the operating system to register an input instruction in the input instruction queue; and
A third step of registering the input instruction in the input instruction queue when receiving the instruction in the second step, and an identification address of the partner system indicating the transmission data in the output buffer and a transmission destination of the transmission data. A fourth step of notifying the operating system of the transmission data and the identification address received by the operating system in the fourth step. A fifth step of transmitting the transmission data received to the system; a sixth step of receiving the received data with the identification address from the partner system in the operating system; ,
Searching the input command queue using the identification address received in the sixth step as a key, and if the input command including the received identification address is registered, the transmission data previously transmitted to the partner system; Recognizes that the received data has been received from the partner system as a response to the input buffer and stores the received data in accordance with the address of the input buffer that stores the received data from the partner system in the searched input command. A seventh step of notifying an entry number for storing an address indicating an interrupt processing routine in the input instruction in the operating system; and Interrupt processing routine notified in step 8 A ninth step of issuing an interrupt accompanied by an address indicating an interrupt processing routine upon receipt of an entry number storing an address indicating an interrupt service routine; and receiving an interrupt in the ninth step, upon receiving an interrupt in the ninth step. Jumping to an address indicating an interrupt processing routine, and transferring control to an interrupt processing routine for processing the received data received in the input buffer.

The recording medium of the present invention uses an operating system having an input command queue, an output buffer for storing transmission data, and an input buffer for storing reception data, and stores the transmission data to be transmitted to a partner system in the output buffer. A second step of issuing an instruction to the operating system to register an input instruction in the input instruction queue; and receiving the instruction in the second step in the operating system. Registering the input instruction in the input instruction queue, and notifying the operating system of the transmission data in the output buffer and an identification address of the partner system indicating a destination of the transmission data. Steps and the operating system A fifth step of receiving the transmission data and the identification address notified in the fourth step, and transmitting the received transmission data to the partner system indicated by the received identification address. A sixth step of receiving the received data with the identification address from the partner system in the operating system, and using the identification address received in the sixth step as a key in the operating system. Search the input command queue, and if the input command including the received identification address is registered, the received data is received from the partner system as a response to the transmission data previously transmitted to the partner system. Recognize and retrieve the said A seventh step of storing the received data in the input buffer according to an address of the input buffer storing the received data from the hand system, and an interrupt processing routine in the input instruction in the operating system. An eighth step of notifying an entry number for storing an address;
Upon receiving the entry number storing the address indicating the interrupt processing routine notified in the eighth step, a ninth step of issuing an interrupt accompanied by the address indicating the interrupt processing routine, and setting the interrupt in the ninth step to Receiving the received data, the control jumps to an address indicating the interrupt processing routine in the entry corresponding to the entry number, and passes control to an interrupt processing routine for processing the received data received in the input buffer. Record the program to be executed.

[0015]

Next, a first embodiment of the present invention will be described in detail with reference to the drawings. FIG. 1 is a block diagram showing a first embodiment of the present invention. Referring to FIG. 1, a first embodiment of the present invention includes an operating system 10 and an application program 1.
10 and a partner system 20. This partner system 20 is, for example, a plurality of systems connected by a communication line. Communication with the partner system 20 is performed using an identification address for identifying the partner system 20.

The application program 110 includes an output instruction 111, an input buffer 112, an input instruction 113,
Input instruction interrupt processing unit 114 and output buffer 1
15 inclusive. Also, the operating system 10
An asynchronous input / output unit 100 includes an output instruction processing unit 101, an input instruction processing unit 102, an input instruction queue 103, and an interrupt processing unit 104.

The output buffer 115 is connected to the partner system 20.
Stores transmission data to be transmitted to.

The output command 111 instructs the output command processing unit 101 to transmit the transmission data stored in the output buffer 115 to the partner system 20.

The input buffer 112 receives the data received from the partner system 20 from the input command processing unit 102 and stores it.

The input instruction 113 stores an identification address for identifying the partner system 20, an address of the input buffer 112 for storing data received from the partner system 20, and an address indicating a corresponding interrupt processing routine of the input instruction interrupt processing unit 114. Instruct the operating system 10 on the entry number to be executed.

The input command interrupt processing unit 114 performs a process of holding an address of an interrupt processing routine for received data in the input buffer 112 received from the partner system 20 in each entry and jumping to the interrupt processing routine.

The output command processing unit 101 transmits the transmission data in the output buffer 115 to the partner system 20 in accordance with the instruction of the output command 111 of the application program 110.

The input command processing unit 102 is connected to the partner system 2
0, receive the received data corresponding to the transmitted data transmitted earlier, store the received data in the input buffer 112 in accordance with the instruction of the input command corresponding to the received data in the input command queue 103, and store the received data in the interrupt processing unit 104. An instruction to issue an interrupt to the application program 110 is issued.

The input command queue 103 stores input commands 113 from the application program 110 as a queue.

The interrupt processing unit 104 is connected to the partner system 2
When receiving the reception data corresponding to the transmission data transmitted earlier from 0, an interrupt is issued to the application program 110 according to the instruction of the input command processing unit 102, and the input instruction interrupt processing unit 114 of the application program 110 is issued. Pass control to.

Next, the output instruction 111 will be described in detail. FIG. 2 is a detailed explanatory diagram of the output instruction 111. Referring to FIG. 2, the first and second rows include the partner system 20.
The third and fourth lines are instructions for enabling transmission to the partner system 20. The fifth line is an instruction for actually transmitting the transmission data in the output buffer 115 to the partner system 20.

"RemoteNodeName" contains the partner system 2
An identification address indicating 0 is substituted.

Next, the input command 113 will be described in detail. FIG. 3 is a detailed explanatory diagram of the input instruction 113. Referring to FIG. 3, the entry number of the input instruction interrupt processing unit 114 that stores the address indicating the interrupt processing routine is substituted for “swi_read” in the first row, and “Pi
“n_fno” is assigned an identification address indicating the partner system 20 defined by the output instruction 111. Also, the address of the input buffer 112 that stores the data received from the partner system 20 is substituted for “(BYTE *) & Rbuff” in the third line.

Next, the operation of the first embodiment of the present invention will be described with reference to the drawings. FIG. 4 shows the first embodiment of the present invention.
9 is a flowchart showing the operation of the embodiment.

First, the application program 110
Stores the transmission data to be transmitted to the partner system 20 in the output buffer 115 (step S1 in FIG. 4).

Next, the application program 110
Is an input command 11 to the operating system 10.
3 is issued to the input command queue 103 (step S2 in FIG. 4). The input command 113 includes an identification address for identifying the partner system 20,
And an entry number storing an address indicating the corresponding interrupt processing routine of the input instruction interrupt processing unit 114.

Next, the operating system 10
Input instruction 113 from application program 110
Is received in the input command queue 103, the input command 113 is registered in the input command queue 103 (step S3 in FIG. 4).

Next, the application program 110
Executes the output instruction 111, and stores the transmission data in the output buffer 115 and the identification address of the partner system 20 indicating the transmission destination of the transmission data in the operating system 10.
To the output instruction processing unit 101 (step S in FIG. 4).
4).

Next, the operating system 10 output instruction processing unit 101
When the transmission data and the identification address of the partner system 20 are received from 0, the received transmission data is transmitted to the partner system 20 indicated by the received identification address (step S5 in FIG. 4).

Next, the input command processing unit 102 of the operating system 10 receives, from the partner system 20, received data with an identification address indicating the partner system 20 (step S6 in FIG. 4).

Next, the input command processing section 102 of the operating system 10 searches the input command queue 103 using the identification address received from the partner system 20 as a key, and if the input command including the received identification address is registered. For example, it recognizes that the received data has been received from the partner system 20 as a response to the transmission data previously transmitted to the partner system 20, and transmits the received data from the partner system 20 in the searched input command (hereinafter, referred to as a corresponding command). The received data is stored in the input buffer 112 of the application program 110 according to the address of the input buffer 112 to be stored (Step S7 in FIG. 4).

Next, the input command processing unit 102 of the operating system 10 notifies the interrupt processing unit 104 of the entry number for storing the address indicating the interrupt processing routine in the corresponding command (step S8 in FIG. 4).

Next, when the interrupt processing unit 104 of the operating system 10 receives the entry number storing the address indicating the interrupt processing routine from the input instruction processing unit 102, the interrupt processing unit 104 sends the entry number to the input instruction interrupt processing unit 114 of the application program 110. Then, an interrupt with an address indicating the interrupt processing routine is issued (step S9 in FIG. 4).

Next, the application program 110
Receives an interrupt with an entry number storing an address indicating the interrupt processing routine from the interrupt processing unit 104 of the operating system 10, the input instruction interrupt processing unit 114 indicates the interrupt processing routine in the entry corresponding to the entry number. The control jumps to the address and passes control to an interrupt processing routine for processing the received data received by the input buffer 112 (FIG. 4).
Step S10).

Next, a second embodiment of the present invention will be described in detail with reference to the drawings. The second embodiment of the present invention is a method including the steps of FIG. That is, in the second embodiment of the present invention, a first step of storing transmission data to be transmitted to the partner system 20 in the output buffer 115 (step S1 in FIG. 4), and inputting an input instruction 113 to the operating system 10 In the second step (step S2 in FIG. 4) for issuing an instruction to be registered in the instruction queue 103, and when the operating system 10 receives the instruction in the second step, the input instruction 113 is registered in the input instruction queue 103. The third step (step S3 in FIG. 4) and the output buffer 115
A fourth step of notifying the operating system 10 of the transmission data within and the identification address of the partner system 20 indicating the transmission destination of the transmission data (step S4 in FIG. 4).
Receiving the transmission data notified in the fourth step and the identification address of the partner system 20 in the operating system 10, and transmitting the received transmission data to the partner system 20 indicated by the received identification address. Step (Step S5 in FIG. 4)
A sixth step (step S6 in FIG. 4) of receiving the received data with the identification address indicating the partner system 20 from the partner system 20 in the operating system 10; The input command queue 103 is searched using the received identification address as a key. If an input command including the received identification address is registered, the received data is transmitted from the partner system 20 as a response to the transmission data previously transmitted to the partner system 20. A seventh step of recognizing that the received data has been received and storing the received data in the input buffer 112 according to the address of the input buffer 112 storing the received data from the partner system 20 in the searched input command (corresponding command) (FIG. 4) Step S7) and the operating system 0, the eighth step (step S8 in FIG. 4) for notifying the entry number for storing the address indicating the interrupt processing routine in the corresponding instruction, and the operating system 10 for notification in the eighth step. Upon receiving the entry number storing the address indicating the interrupt processing routine, a ninth step (step S9 in FIG. 4) of issuing an interrupt accompanied by the address indicating the interrupt processing routine, and the entry number storing the address indicating the interrupt processing routine Is received, an jump is made to the address indicating the interrupt processing routine in the entry corresponding to the entry number, and control is passed to the interrupt processing routine that processes the received data received in the input buffer 112 (step 10). FIG. 4 step S10)

Next, a third embodiment of the present invention will be described in detail with reference to the drawings. FIG. 5 shows a third embodiment of the present invention.
It is a block diagram showing an embodiment. Referring to FIG. 5, a third embodiment of the present invention is a recording medium 40 for recording a program for causing a computer 30 to execute each step of the second embodiment of the present invention. That is, in the third embodiment of the present invention, a first step of storing transmission data to be transmitted to the partner system 20 in the output buffer 115 (step S1 in FIG. 4), and inputting an input instruction 113 to the operating system 10 In the second step (step S2 in FIG. 4) for issuing an instruction to be registered in the instruction queue 103, and when the operating system 10 receives the instruction in the second step, the input instruction 113 is registered in the input instruction queue 103. The third step (step S3 in FIG. 4) and the output buffer 115
A fourth step of notifying the operating system 10 of the transmission data within and the identification address of the partner system 20 indicating the transmission destination of the transmission data (step S4 in FIG. 4).
Receiving the transmission data notified in the fourth step and the identification address of the partner system 20 in the operating system 10, and transmitting the received transmission data to the partner system 20 indicated by the received identification address. Step (Step S5 in FIG. 4)
A sixth step (step S6 in FIG. 4) of receiving the received data with the identification address indicating the partner system 20 from the partner system 20 in the operating system 10; The input command queue 103 is searched using the received identification address as a key. If an input command including the received identification address is registered, the received data is transmitted from the partner system 20 as a response to the transmission data previously transmitted to the partner system 20. A seventh step of recognizing that the received data has been received and storing the received data in the input buffer 112 according to the address of the input buffer 112 storing the received data from the partner system 20 in the searched input command (corresponding command) (FIG. 4) Step S7) and the operating system 0, the ninth step of notifying the entry number for storing the address indicating the interrupt processing routine in the corresponding instruction (step S8 in FIG. 4), and the operating system 10 has been notified in the eighth step. Upon receiving the entry number storing the address indicating the interrupt processing routine, a ninth step (step S9 in FIG. 4) of issuing an interrupt accompanied by the address indicating the interrupt processing routine, and the entry number storing the address indicating the interrupt processing routine Is received, an jump is made to the address indicating the interrupt processing routine in the entry corresponding to the entry number, and control is passed to the interrupt processing routine that processes the received data received in the input buffer 112 (step 10). Step S10 in FIG. A recording medium 40 which records a program to be executed by Yuta 30.

The first program including the first, second, fourth, and tenth steps, and the first program including the third, fifth, sixth, seventh, eighth, and ninth steps. 2 can be recorded on different recording media 40. These programs, for example,
The program is stored in the hard disk of the computer 30 and executed.

[0043]

A first effect of the present invention is that an application program can reliably receive data without omission in connectionless protocol communication.

The reason is that the application program sends an input command for receiving received data to the operating system prior to the output command, and the operating system holds the input command.

The second effect is that data can be prevented from being missed by only the receiving side, and can be realized without adding a special mechanism to a communication partner or a relay device.

The reason is that the application program sends an input command for receiving received data to the operating system prior to the output command, and the operating system holds the input command.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a first embodiment of the present invention.

FIG. 2 is a detailed explanatory diagram of an output instruction.

FIG. 3 is a detailed explanatory diagram of an input command.

FIG. 4 is a flowchart showing an operation of the first exemplary embodiment of the present invention.

FIG. 5 is a block diagram showing a third embodiment of the present invention.

[Explanation of symbols]

 Reference Signs List 10 operating system 20 partner system 30 computer 40 recording medium 100 asynchronous input / output unit 101 output command processing unit 102 input command processing unit 103 input command queue 104 interrupt processing unit 110 application program 111 output command 112 input buffer 113 input command 114 input command interrupt Processing unit 115 Output buffer

Claims (7)

(57) [Claims] An output having an operating system and an application program for transmitting an input instruction for receiving received data corresponding to transmission data to the operating system first, and then passing the transmission data to the operating system. The application program for executing the instruction, the input instruction received from the application program is held in an instruction queue, and then the transmission data received from the application program is transmitted to a partner system, and the transmission data is transmitted. Receiving the received data from the partner system, storing the received data in a predetermined area of the application program in accordance with a corresponding input command in the command queue. A data transmission / reception method, comprising: 2. The operating system according to claim 2, wherein the operating system issues the interrupt for processing the received data to the application program in accordance with the input command after storing the received data in a predetermined area of the application program. The data transmission / reception method according to claim 1, wherein 3. An operating system and an application program, wherein the application program first transmits an input command for receiving received data corresponding to transmission data to the operating system, and then transmits the transmission data to the operating system. Executing an output instruction to pass the input instruction received from the application program to an instruction queue, and then transmitting the transmission data received from the application program to a partner system, and transmitting the transmission data. When receiving the received data corresponding to the transmitted data from the partner system, the received data received in accordance with the corresponding input command in the command queue is determined by a predetermined program of the application program. A data transmission / reception method, wherein the data is stored in an area. 4. The operating system, after storing the received data in a predetermined area of the application program, issues an interrupt for processing the received data to the application program in accordance with the input command. Claim 3
Data transmission / reception method described. 5. An application program including an output command, an input buffer, an input command, an input command interrupt processing unit, and an output buffer, and an operating system including an output command processing unit, an input command processing unit, an input command queue, and an interrupt processing unit. The output buffer for storing transmission data to be transmitted to the partner system; and the output instructing the output command processing unit to transmit the transmission data stored in the output buffer to the partner system. Instructions, an identification address for identifying the partner system, an address of the input buffer and an input instruction for instructing the operating system on an entry number for storing an address indicating an interrupt processing routine corresponding to the input instruction interrupt processing unit; Received data received from the partner system Data in the input buffer stored from the input instruction processing unit, and the address of an interrupt processing routine for the received data in the input buffer received from the partner system in each entry, and jumping to the interrupt processing routine. The input instruction interrupt processing unit that performs the above, an input instruction queue that stores the input instruction from the application program as a queue, and the transmission data in the output buffer that is transmitted to the partner system by an instruction of the output instruction. An output command processing unit, receiving the reception data from the partner system, storing the reception data in the input buffer according to an instruction of the input command corresponding to the reception data in the input command queue, and Interrupt to the application program An input instruction processing unit for instructing the application program to issue, and an interrupt processing unit for issuing an interrupt to the application program in accordance with the instruction of the input instruction processing unit and transferring control to the input instruction interrupt processing unit of the application program And a data transmission / reception method characterized by having: 6. An operating system having an input instruction queue, an output buffer for storing transmission data, and an input buffer for storing reception data, wherein the transmission data to be transmitted to a partner system is stored in the output buffer. And a second step of issuing an instruction to the operating system to register an input instruction in the input instruction queue. In the operating system, when the instruction in the second step is received, the input instruction is executed. A third step of registering in the input instruction queue, a fourth step of notifying the operating system of the transmission data in the output buffer and an identification address of the partner system indicating a transmission destination of the transmission data, The operating system, Upon receiving the transmission data and the identification address notified in the fourth step,
A fifth step of transmitting the transmission data received to the partner system indicated by the received identification address, and a sixth step of receiving the reception data with the identification address from the partner system in the operating system. And searching the input command queue using the identification address received in the sixth step as a key, in the operating system,
If the input command including the received identification address is registered, it is recognized that the received data is received from the counterpart system as a response to the transmission data previously transmitted to the counterpart system, and the searched input command is retrieved. A seventh step of storing the received data in the input buffer according to an address of the input buffer storing the received data from the partner system in the operating system; and an interrupt processing in the input command in the operating system. An eighth step of notifying an entry number storing an address indicating a routine; and receiving an entry number storing an address indicating the interrupt processing routine notified in the eighth step in the operating system. Ad indicating processing routine A ninth step of issuing an interrupt accompanied by an interrupt, and upon receiving the interrupt in the ninth step, jumps to an address indicating an interrupt processing routine in the entry corresponding to the entry number and receives the interrupt in the input buffer. A tenth step of passing control to an interrupt processing routine for processing the received data. 7. An operating system having an input instruction queue, an output buffer for storing transmission data, and an input buffer for storing reception data, wherein the transmission data to be transmitted to a partner system is stored in the output buffer. And a second step of issuing an instruction to the operating system to register an input instruction in the input instruction queue. In the operating system, when the instruction in the second step is received, the input instruction is executed. A third step of registering in the input instruction queue, a fourth step of notifying the operating system of the transmission data in the output buffer and an identification address of the partner system indicating a transmission destination of the transmission data, The operating system, Upon receiving the transmission data and the identification address notified in the fourth step,
A fifth step of transmitting the transmission data received to the partner system indicated by the received identification address, and a sixth step of receiving the reception data with the identification address from the partner system in the operating system. And searching the input command queue using the identification address received in the sixth step as a key, in the operating system,
If the input command including the received identification address is registered, it is recognized that the received data is received from the counterpart system as a response to the transmission data previously transmitted to the counterpart system, and the searched input command is retrieved. A seventh step of storing the received data in the input buffer according to an address of the input buffer storing the received data from the partner system in the operating system; and an interrupt processing in the input command in the operating system. An eighth step of notifying an entry number storing an address indicating a routine; and receiving an entry number storing an address indicating the interrupt processing routine notified in the eighth step in the operating system. Ad indicating processing routine A ninth step of issuing an interrupt accompanied by an interrupt, and upon receiving the interrupt in the ninth step, jumps to an address indicating an interrupt processing routine in the entry corresponding to the entry number and receives the interrupt in the input buffer. And a tenth step of transferring control to an interrupt processing routine for processing the received data.