JPH0426254A - Information processor - Google Patents

Abstract

PURPOSE:To efficiently use system resources, to expand communication party, and to facilitate system generation by pooling the number of simultaneously connectable information processors in the group of subscriber's lines at the time of the system generation as a maximum number, and empty-managing network connections at every communication party. CONSTITUTION:A logical channel idle management means 4 sets the number of information processors which can simultaneously communicate in the group of subscriber's lines, pooling this number as the maximum value to manage the idle state of the logical channel in the group of subscriber's lines by referring to a control table 6 including a means forming the chain of unused numbers. A network node idle management means 5 is in the idle stage on the control table 6 in the case of setting the network connection, eliminating one of the information processors which can simultaneously communicate from the chain to incorporate this information processor while being in the idle state into the chain when the network connection is opened. Thus, the network connection can dynamically be managed, the system resources can efficiently be used, the communication party can be expanded, and the system generation can be facilitated.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention is applied to a packet communication network based on X.25 (CCI T T standard).

The present invention relates to a distributed network system in which a plurality of information processing devices are connected via a packet switching network (VC connection), and more particularly to a distributed network that establishes and releases network connections between information processing devices and transfers data.

〔overview〕

In information processing devices connected to a packet switching network, the present invention pools the maximum number of information processing devices under a subscriber line group that can be connected simultaneously at the time of system generation, and manages empty network connections for each communication partner. This enables dynamic management of network connections, efficient use of system resources, expansion of communication partners, and ease of system creation.

[Conventional technology]

In the conventional example, when setting up a network connection between the own information processing device and another information processing device, a communication partner is fixedly assigned to each CCITT standard A method was adopted in which devices were permanently registered as network nodes at the time of system creation and network connections were controlled.

[Problem to be solved by the invention]

In such conventional examples, when expanding the system by adding other information processing devices connected to the packet switching network (VC connection), it is necessary to stop the system and restart the system generation. This has the disadvantage that it is not possible to communicate with any other party, which is the advantage of a packet switching network (VC connection), and the ease of connection is lost.

In addition, multiple X. If there are 25 subscriber lines, the information processing device to be communicated with is fixed for each 25 subscriber line and uses a network connection.
, 25 Even if there is an empty logical channel within the subscriber line, it cannot be used as a network connection with other information processing equipment, and furthermore, even if the network connection with the communication partner is released, this network connection cannot be used. System resources used for control cannot be used to connect with other communication partners, which limits the maximum number of information processing devices that can communicate with each other, resulting in the disadvantage that system resources cannot be used efficiently.

The present invention aims to eliminate such drawbacks by providing a device that dynamically manages network connections to enable efficient use of system resources, expansion of communication partners, and ease of system generation. With the goal.

[Means to solve the problem]

The present invention provides an information processing apparatus connected to a packet switching network and equipped with a control table that stores information referred to when creating a header for specifying a communication path through which a transmitted packet passes. It includes means for setting the number of information processing devices under the subscriber line group that can communicate simultaneously, and pooling this number as a maximum value to form a chain of unused units; a logical channel empty management means for managing the empty status of the logical channels of the network connection; and one of the information processing devices that is in an empty status on the control table and is capable of simultaneous communication when setting up a network connection is removed from the chain. ,
The present invention is characterized by comprising a network node vacancy management means that makes the information processing device vacant and incorporates it into the chain when a network connection is released.

The network connection is X. It is preferable to set it for each 25 subscriber lines.

[Function] 1 When a network connection request is received from a network user, a network is created by pooling the number of information processing devices capable of simultaneous communication under the subscriber line group stored in the control table as the maximum value. One of the information processing devices capable of simultaneous communication that is in a free state is removed from the chain of the number of used devices, and when this information processing device is released from the network controller 2, it is made free and incorporated into the chain of control tables.

By managing the availability of network connections for each communication partner in this way, it is possible to dynamically manage the network connections when a request is made to set up a network connection to another information processing device, and it is also possible to can be used efficiently, and can further facilitate communication, expansion of partners, and system generation.

〔Example〕

Next, an embodiment of the present invention will be described with reference to drawing 1.

Fig. 1; a block diagram showing the configuration of an embodiment of the present invention; Fig. 2;
The figure is a block diagram showing the overall configuration according to an embodiment of the present invention.

The embodiment of the present invention is connected to a packet switching network 19 and includes a control table 6 that stores information that is referred to when creating a header for specifying a communication path through which a transmission packet passes. a subscriber line group management means 1 for managing a subscriber line group; a network connection management means 2 for managing network setting and release; and a network procedure control means 3 for controlling communication according to a defined network procedure; Furthermore, in the control table 6,
Information processing bag with simultaneous communication under subscriber line group @7-11
The logical channel includes means for setting the number of logical channels and pooling this number as the maximum value to form a chain of unused channels, and manages the empty state of logical channels under the subscriber line group by referring to the control table 6. When the empty management means 4 and the network connection are set, one of the information processing devices that is in an empty state on the control table 6 and is capable of simultaneous communication is removed from the chain, and when the network connection is released, the relevant information processing is performed. network node vacancy management means 5 for making devices vacant and incorporating them into the chain; Network connections are set for each subscriber of X,25.

The system configuration to which the embodiment of the present invention is applied is as shown in FIG.
The information processing device 8 is connected to the packet switching network 19 via the information processing device 8;
．． 9.10 and 11 are other information processing devices as communication partners.

FIG. 3 is a diagram showing the structure of the control table in the embodiment of the present invention. Control table 6 is subscriber line management table 2
0, a network node empty management table 21, an empty network node pool table 22, and a logical channel table 23. The subscriber line management table 20 stores the maximum number of subscribers, subscriber line number, local network address, and used network node number.

The network node empty management table 21 stores the network node tables pooled at the time of system generation in a chain, and stores the maximum number of network nodes, the current number of empty network nodes, and the first empty link pointer to the empty network node table 22. be done.

The idle work node boolean table 22 contains the next pointer for chaining, the network node number, an in-use flag indicating whether or not it is being used in network connection settings, and information for setting up a network connection. It has an area for storing the network address of the communication partner.

In addition, the logical channel table 23 includes the type of logical channel specified at the time of system generation (for outgoing calls, outgoing calls, incoming calls) provided for each subscriber line, the logical channel number, and the flag in use. is stored. this,
The logical channel table 23 is generated for each subscriber line and linked from the subscriber line management table 20.

Next, the operation of the embodiment of the present invention configured as described above will be explained.

When a network connection request is generated from a non-network user, the network connection management means 2 acquires the network address of the specified other information processing device, and the subscriber line group management means 1 acquires the network address of the specified other information processing device, and the subscriber line group management means 1 determines the network address of the specified other information processing device. X in the line management table 20 25 subscriber lines available.

Next, an empty network node request is sent to the network node empty management means 5 to request an empty network node 7) for controlling network connections.

The network node empty management means 5 obtains the empty network node pool table 22 from the first empty link pointer in the network node empty management table 21, and uses the next pointer in the empty network node pool table 22 and the top empty link pointer in the network node empty management table 21. The empty link pointer is replaced with the empty link pointer, and the current number of empty nodes in the network node empty management table 21 is counted down by "1".

For example, as shown in FIG. 3, it is assumed that the linking of the first empty link pointer in the network node empty management table 21 is in the order of network node numbers N1, N2, and N3 in the empty network node pool table 22. When a network node request is made, Nl is removed from the chain from the free network node pool table 22 and the network node free management table 2
The first link pointer in 1 is the network node number N
2, and the linking changes to N2 and N3. Also, the current number of empty nodes in the network node empty management table 21 changes from three to two.

The network node availability management means 5 notifies the network connection management means 2 of the network node number (for example, Nl) and the network node table. Further, the network node number is notified to the subscriber line group management means 1 via the network connection management means 2, and is set as the network node number of the subscriber line name in the subscriber line management table 20.

Since the network connection management means 2 is capable of setting network connections, it stores the network address of the communication partner in the partner network address area in the acquired network node table, turns on the in-use flag in the network node table, and A connection setting instruction is given to the network procedure control means 3.

The network procedure control means 3 requests a calling logical channel to the logical channel availability management means 4 in order to obtain a calling logical channel to be used at the time of network connection.

The logical channel empty management means 4 uses a logical channel table 23 corresponding to the subscriber line from the subscriber line management table 2G.
The calling logical channel is searched for and notified to the network procedure control means 3.

The network procedure control means 3 generates a network connection frame, that is, a calling packet (the network address stored in the other party's network address area in the obtained network node table, that is, the other party's DTE (data terminal equipment) address) generate a logical channel number etc. as a calling packet),
Send to the information processing device of the communication partner.

Next, the network procedure control means 3, which has received the call completion packet indicating that the network connection setting has been completed from the information processing device of the communication partner, notifies the network connection management means 2 of confirmation of the network connection setting.

The network connection management means 2 notifies the network user of the network connection setting confirmation and completes the network connection setting. In addition, when the first empty link pointer in the network node empty management table 21 becomes empty, that is, when there is no empty space in the network node table (for example, when the network connection with the information processing device 8.9.10 in FIG. Network node number = 3 and network node number N
1, N2, and N3), when the network user side information processing device 7 requests a network connection setting request to the information processing device 11 in FIG. It is notified that the network connection setting has failed.

If a network connection with another information processing device has already been established (for example, when the non-work node number N1 has been used as the network connection with the information processing device 8 in FIG. 2), if the network user is the same When a network connection setup request is made to the information processing device (that is, in the above example, a network connection setup request is made to the information processing device 8), the network connection management means 2 determines whether the other party's network address is the same from the network node table group in use. The network node control process is similarly performed using a certain network node table (that is, the table with network node number N1 in the above example).

When a network user notifies a request to release a network connection with another information processing device, the network connection management means 2 uses the network node table used with the information processing device to request the network procedure control means 3. command to release the network connection. The network procedure control means 3, which has been notified of the release instruction, generates a network connection release frame (disconnection) and releases the network connection with the other information processing device.

Upon receiving the completion of network connection release from the communication partner information processing device, the network procedure control means 3 notifies the release completion to the network connection management means 2, and also instructs the logical channel empty management means 4 to release the calling logical channel. conduct. The logical channel empty management means 4 makes the calling logical channel that was being used unused.

Upon receiving the network connection release completion notification, the network connection management means 2 notifies the network node empty management means 5 to return the network node table that was used only when all network connections with the information processing device have been released. Link the network node table to the empty link of the work node empty management table.

Further, the used network node number in the subscriber line management table 20 in use under the subscriber line is released to the subscriber line group management means 1 via the network connection management means 2.

Upon receiving the network connection release completion notification, the network connection management means 2 notifies the network user of the network connection release completion and completes the network connection release process.

2. Effects of the Invention 2. As explained above, according to the present invention, when creating a system, the number of other information processing devices under a subscriber line group that can be connected simultaneously is pooled as the maximum number, and network connections for each communication partner are freed. By linking, network connection control can be performed at the time of a request to set up a network connection to another information processing device, and system resources can be used efficiently.

In addition, network control with a large number of information processing devices can be performed dynamically within the maximum number of simultaneous connections.
If applied to a distributed network system in which a large number of information processing devices are connected within a packet switching network (VC connection), it becomes possible to provide communication services with a large number of parties.
Since network connection control is performed for each X,25 subscriber line group, if you use the X,25 representative selection function, other information processing devices will have the same subscriber number (representative DTE number).
Even if some of the X, 25 subscriber lines fail, it is possible to make calls using the communication power of other X, 25 subscriber lines, improving the reliability of the system. There is an effect that can be done.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention. FIG. 2 is a block diagram showing the overall configuration in an embodiment of the present invention. FIG. 3: A diagram showing the configuration of a control table in an embodiment of the present invention. DESCRIPTION OF SYMBOLS 1... Subscriber line group management means, 2... Network connection management means, 3... Network procedure control means, 4.
...Logical channel empty management means, 5...Network node empty management means, 6...Control table novel 7.8
．． 9.10.11... Information processing device, 12.13.1
4.15.16.17.18...Subscriber line, 19.
...Packet switching network (VC connection), 20...Subscriber line management table, 21...Network node empty management table novel 22...Empty@2, Sotowork node boolean table, 23...Rosiculture table, Neltchy full.

Claims (1)

[Scope of Claims] 1. An information processing device connected to a packet switching network and provided with a control table that stores information referred to when creating a header for specifying a communication path through which a transmitted packet passes, wherein the control table includes: , means for setting the number of information processing devices that are capable of simultaneous communication under the subscriber line group, and pooling this number as a maximum value to form a chain of unused devices; a logical channel empty management means for managing the empty status of logical channels under a line group; and one of the information processing devices that is in an empty status on the control table and is capable of simultaneous communication when setting a network connection from the chain. and network node vacancy management means for making the information processing apparatus vacant and incorporating it into the chain when the network connection is released. 2. The network connection is X. 2. The information processing apparatus according to claim 1, wherein the information processing apparatus is set in units of 25 subscriber lines.