JP2947121B2 - Network access method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a network access method, and more particularly to a network access method for performing communication between online application programs.

[0002]

2. Description of the Related Art Conventionally, when performing communication between online application programs in the same host computer, when an application program on the transmission side transmits a message via a virtual terminal, communication control means sets a destination address in the message. The message is sent to the message sending means, and a value determined in advance so as to correspond to the destination address included in the sending message by the address converting means via the pseudo wire in a 1: 1 manner is set as the source address in the same message. A network access method is known in which the message is passed to a message receiving means, and is passed to a receiving-side application program via a virtual terminal to which a destination address having a value equal to the source address is given. JP 3-102551 A: Title of the Invention Online application program-to-program communication system ").

As another conventional network access method, a system is used between an application program executed on at least one host computer and a number of data terminal equipment (DTE) connected to an X25 packet switching network. In a communication system provided by a virtual circuit connected to a network architecture (SNA) network, a method for improving the possibility of re-routing is known (Japanese Patent Laid-Open No. Hei 5 (1993) -205).
No. 153167: title of the invention "communication controller").

[0004]

According to each of the above-mentioned conventional network access methods, the address of the communication partner is specified at the time of transmission, but the address has no business meaning. Therefore, when transmitting a message, it is necessary to be aware of the network address of the transmission destination, and the versatility is greatly impaired. In addition, since the communication path is one path using a single resource, communication becomes impossible when a communication failure occurs, which is extremely inconvenient in operation.

[0005] The present invention has been made in view of the above points,
The application program does not directly use the address of the network to be accessed, but accesses the network using the corresponding logical communication partner name, thereby reducing the influence on the expansion of the network configuration. An object of the present invention is to provide a network access method capable of improving operability by setting a communication partner so that an application program can select a bypass route for a failure without being aware of a communication route.

[0006]

According to the present invention, in order to achieve the above object, a transmission side application program specifies a logical communication partner name and registers a transmission message in a communication partner queue of a transmission queue management function. The transmission-side queue management function searches the resource queue of the transmission-side communication control function corresponding to the logical communication partner name for a resource queue that is not in failure and is not in use, and searches all resource queues.
When the skew is in failure or in use,
After the fixed time has elapsed, the search is started again , and
The message is registered by specifying the network address corresponding to the logical communication partner name for the unused resource queue and the communication control function on the transmitting side extracts the message from the resource queue and sends it to the network. In this case, a registration is made in the corresponding receiving partner queue via the receiving communication control function by the network address, and the registration message of the receiving partner queue is taken into the receiving application program.

[0007] Further, the transmission-side communication control function of the present invention includes:
The transmission-side queue management function has a plurality of resource queues corresponding to the network address, and the reception-side communication control function has a plurality of resource queues corresponding to each resource queue of the transmission-side communication control function.

[0008]

According to the present invention, when a transmission side application program transmits a message, a logical communication partner is set instead of directly specifying a transmission destination network address, and a transmission side queue management function is transmitted from a transmission side application program. Send a message specifying the network address corresponding to the specified logical communication partner,
Since the receiving application program is made to receive via the network, the application program can communicate without being aware of the network address, and by setting the communication procedure for each resource queue in the communication control function, A program can be developed between receiving application programs without being aware of the communication procedure.

Further, according to the present invention, the transmission-side communication control function and the reception-side communication control function each have a plurality of resource queues corresponding to the network addresses. Can be another route.

[0010]

Next, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 shows a block diagram of an embodiment of the method of the present invention. In the present embodiment, a transmission-side application program (AP) 1, a transmission-side queue management function 2, a transmission-side communication control function 3, a network 4, a reception-side communication control function 5, a reception-side queue management function 6, and a reception-side application program ( AP) 7. The queue management functions 2 and 6 include communication partner queues 8 and 15, respectively. The communication control function 3 is a resource queue 9, 10 and 11, and the communication control function 5 is a resource queue 12,
13 and 14 respectively.

Next, the operation of this embodiment will be described with reference to the flowchart for explaining the processing of FIG. When the communication-side AP 1 transmits the message 16 to the reception-side AP 7, the transmission-side AP 1 registers the message 16 in the transmission-side communication partner queue 8 by specifying a logical communication partner name instead of a network address as a communication partner. , To the transmission-side queue management function 2.

Then, the transmission side queue management function 2 schedules the communication partner queue 8 (step 21), and searches the transmission side resource queues 9, 10 and 11 of the three designated logical communication partners (step 22). ). When an unused resource queue is searched by the resource queue search (steps 23 and 24), it is determined whether or not the unused resource queue is in failure (step 25). The message 16 is registered with the network address corresponding to the logical communication partner name specified in the transmission-side resource queue found to be free, and the message 16 is notified to the transmission-side communication control function 3 (step 26).

When it is determined in step 24 that the resource queue is not unused, the resource queue is searched again. When it is determined in step 25 that the resource queue is in failure, the resource queue is similarly re-searched. Perform a search. When the search for all resource queues is completed, a timer retry process for searching again after a predetermined time has elapsed is performed (step 27), and the resource queue is searched again (step 22).

By the communication start processing in step 26, the transmission-side communication control function 3 extracts the message 16 from the transmission-side resource queue in which the message 16 is registered, and transmits the message 16 to the network 4. Network 4
Registers the message 16 in the resource queue of the receiving side by the network address,
To instruct.

Here, when the transmission-side resource queue in which the message 16 is registered is the resource queue 9, the message 1 is determined by the network address.
The resource queue on the receiving side in which 6 is registered is the resource queue 12.

The receiving communication control function 5 that has received the message 16 registers the message 16 in the corresponding receiving communication queue 15 and instructs the receiving queue management function 6. The receiving side queue management function 6 notifies the receiving side AP 7 that the message 16 has been received. The receiving AP 7 sends the message 1 from the receiving communication partner queue 15 according to the instruction.
Capture 6.

As described above, according to the present embodiment, the transmitting side A
The P1 and the receiving AP 7 can access the network 4 without being aware of the network address.

When the network between the transmission-side resource queue 9 and the reception-side resource queue 12 is in failure, the transmission-side communication control function 3 recognizes the failure, so that the communication control function 3 is separated. The message 16 is transmitted using the transmission-side resource queue 10. Thus, the transmitting AP 1 can transmit the message 16 without being conscious of the selection of the communication path.

[0019]

As described above, according to the present invention,
When the sending application program sends a message, communication can be performed without being aware of the network address, and by setting the communication procedure for each resource queue in the communication control function, communication between the sending and receiving application programs can be performed. Since the program can be developed without being aware of the procedure, the versatility and compatibility of the application program can be improved.

Further, according to the present invention, each of the transmission-side communication control function and the reception-side communication control function has a plurality of resource queues corresponding to network addresses.
Since a network path between resource queues can be set as different paths between application programs of the same communication partner, a detour path for a network failure can be selected, and operability can be improved.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of an embodiment of the present invention.

FIG. 2 is a flowchart illustrating a process according to an embodiment of the present invention.

[Explanation of symbols]

 1 sender application program (AP) 2 sender queue management function 3 sender communication control function 4 network 5 receiver communication control function 6 receiver queue management function 7 receiver application program (AP) 8 sender communication partner queue 9 10, 11, 12, 13, 14 Resource queue 15 Receiver communication partner queue 16 Transmission message

Continuation of the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) H04L 12/56 H04L 12/54 H04L 12/58 H04L 12/00

Claims (2)

(57) [Claims] 1. A transmission side application program designates a logical communication partner name and registers a transmission message in a communication partner queue of a transmission side queue management function, and the transmission side queue management function specifies the logical communication partner name. Searches for resource queues that are not in failure and are not in use among the multiple resource queues of the sender communication control function corresponding to
When the resource queue is in failure or in use
Starts the search again after a predetermined time has passed , and
And registering the message by specifying a network address corresponding to the logical communication partner name for an unused resource queue, and the transmission-side communication control function extracts the message from the resource queue. And transmitting the registered message to the corresponding receiving partner queue via the receiving communication control function using the network address, and incorporating the registration message of the receiving partner queue into the receiving application program. how to access. 2. The transmission-side communication control function includes a plurality of resource queues corresponding to a network address from the transmission-side queue management function, and the reception-side communication control function includes a resource queue of the transmission-side communication control function. 2. The network access method according to claim 1, comprising a plurality of resource queues corresponding to the queues.