JPS63175552A - Network address expanding system - Google Patents

Abstract

PURPOSE:To attain mutual communication among lots of information processors by designating the transmission path till the communication opposite party in the transmission frame format based on a network address without correcting the network address of an expanded decentralized processing system. CONSTITUTION:The expanded decentralized processing system is formed by using information processors 11-14 connected to loop transmission lines 21, 22 in a loop including a network address expansion device and a network coupler 31. A network address (a) is assigned to the information processors 11, 13, a network address (b) is assigned to the information processors 12, 14 and a network address (x) is assigned to the network coupler 31. The network address is definite on one transmission line. That is, the transmission path till the communication opposite party is designated in the transmission frame format based on the network address. Thus, independent decentralized processing systems are connected mutually.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a network address extension scheme for interconnected and extended distributed processing systems.

〔overview〕

The present invention relates to a network address expansion method for a distributed processing system in which a plurality of independent distributed processing systems are interconnected and expanded. By using the network address of the system and specifying the transmission route to the communication partner in the transmission frame format based on this network address, it is possible to enable mutual communication between a large number of information processing devices.

[Conventional technology]

Conventionally, in the network address expansion method, when independent distributed systems are interconnected, the network address of the information processing device must be unique so that it does not overlap with any other network address on the connected network.

The maximum number of information processing devices that can be connected to a loop-like or bus-like transmission line is limited, and in order to expand the network, it is necessary to interconnect distributed processing systems composed of independent transmission lines. be done.

[Problem that the invention seeks to solve]

However, in such conventional network address expansion methods, if the network address assigned to each information processing device on an interconnected network is unique, the maximum number of connectable information processing devices is limited to the number of independent distributed processing systems. The disadvantage was that it was limited to the same number of cases.

Furthermore, by interconnecting distributed processing systems that were configured independently, there is a drawback that network addresses must be reconfigured according to the system configuration definition.

The present invention solves the above-mentioned drawbacks, and allows independent distributed processing systems to be interconnected without correcting the network addresses of the independent distributed processing systems. The purpose of the present invention is to provide a network address expansion method that allows mutual communication between a greater number of information processing devices than previously known.

[Failure to solve the problem]

The present invention provides a network address expansion method that connects a plurality of independent distributed processing systems to each other and sets the network address of the expanded distributed processing system. Set the network address of the expanded distributed processing system above, and when transmitting data, specify the transmission route to the communication partner in the transmission frame format based on the extended Mk processing system's network address. It is characterized by

[For production]

A network of distributed processing systems that is expanded without modifying the network addresses of each of the multiple independent distributed processing systems when multiple independent distributed processing systems are interconnected to form an expanded distributed processing system. Address. When transmitting data, the transmission route to the communication partner is specified in the transmission frame format based on the network address of this expanded distributed processing system.

(Example〕 Embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram of a network address extension device according to an embodiment of the present invention. In FIG. 1, a network address extension device is included in an information processing device and a network coupling device, and is connected to a central processing device (not shown),
a communication control unit 1 that controls communication between the central processing unit and a partner information processing device (not shown) connected via a transmission path;
The network controller 2 is connected to the communication controller 1 and performs network address conversion and transmission route selection control, which are the features of the present invention.

The communication control section 1 includes a transmission control section 3 and a reception control section 4. The network control section 2 includes a network address translation control section 5 and a network route control section 6.

The operation of the network address extension device having such a configuration will be explained.

FIG. 2 is a block diagram of a distributed processing system connected to a network linking device and an information processing device connected to a loop-shaped transmission path including the network address extension device of the present invention. In FIG. 2, information processing devices 11 and 12 are connected to a transmission path 21, and information processing devices 13 and 14 are connected to a transmission path 22.

The transmission lines 21 and 22 are coupled by a network coupling device 31.

Information processing devices 11.13 are assigned network address a, and information processing devices 12.14 are assigned network address b.

Network coupling device 31 is assigned network address X. These network addresses are unique on one transmission path.

FIG. 3 is a block diagram of a distributed processing system expanded by an information processing device and a network coupling device connected to a bus-like transmission path including the network address expansion device of the present invention.

Information processing devices 100.101 are connected to the transmission path 200, information processing devices 102.103 are connected to the transmission path 201, information processing devices 104.105 are connected to the transmission path 202, and information processing devices 106.107 are connected to the transmission path 202. Transmission line 203
connected to.

Transmission line 200 and transmission line 201 are coupled via network coupling bag W301, and transmission line 201 and transmission line 2 are connected via network coupling bag W301.
02 is coupled via a network coupling device 302, and the transmission path 202 and transmission path 203 are coupled via a network coupling device 303.

Network address a is assigned to information processing device 100.102.104.106, and information processing device 1
Network address b is assigned to 01.103.105.107.

Network addresses x, y, and z are assigned to network coupling devices 301, 302, and 303, respectively.

These network addresses are unique on one transmission path.

FIG. 4 shows a frame format of data transmitted by an information processing device and a network address extension device and a network address extension device according to the present invention.

In FIG. 4, FS: start flag, LK: number of network connections (equal to the number of network connection devices that this frame passes through when it is transmitted from the source information processing device to the destination information processing device), CNA: Current network address (indicates the current destination address DAn and source address SAn).

), DAn: destination address, SAn: source address (When this frame is transmitted from the source information processing device to the destination information processing device, the destination address and source address on the nth transmission path are ), C: control field, FC3n frame check sequence, Fe: end flag.

In FIGS. 1 and 3, when the information processing device 100 transmits a frame to the information processing device 107, the network address conversion control unit 5 first uses a frame that is uniquely predetermined for the destination information processing device 107. Depending on the route information, the number of network connections LK, current network address CNA, and destination address DA are displayed on the frame.
Set I~DAn and source addresses SAI~SAn.

In the case of this embodiment, LK=3, CNA=1. , DAI=x, , 5Al-a,
,DA2=3',,5A2=x,,DA3=z,,5A
3='l, DA4=b, 5A4=z are set.

LK=3 means three network coupling devices 3 from the source to the destination
01 to 303 are passed.

CNA=1 indicates that the destination address DAI and source address SAI are set in the transmission path 200.

That is, CNA=n indicates that the destination address DAn and the source address SAn are set. The frame sent to the transmission path 200 by the transmission control unit 3 of the information processing device 100 is received by the reception control unit 4 of the network coupling device 301 according to DA1=x, and the value of the current network address CNA is set to “+11” by the network path control unit. added,
It is sent to the transmission path 201 by the transmission control unit 3. In a similar manner, the frame sent to the transmission path 203 is received by the reception control unit 4 of the information processing device 107 by DA4=b.

In the network path control unit 5 of the information processing device, C
If NA=LK+1, it is recognized that this information processing device is the final destination of this frame. After that, in the network address conversion control unit 5, the destination address and the source address DA1, SAI, -------1D
The information processing apparatus 100 of the transmission source is recognized by An, , SAn.

The above explanation describes the case where an independent distributed processing system in which information processing equipment is connected to a path-shaped transmission line is expanded, but an independent distributed processing system in which information processing equipment is connected to a loop-shaped transmission line is expanded. This can also be achieved in the same way.

〔Effect of the invention〕

As explained above, the present invention provides system definitions in existing information processing devices (such as network addresses of information processing devices that communicate with each other) when connecting another distributed processing system to an interconnected distributed processing system. ), the system configuration can be changed flexibly and easily, and independent distributed processing systems can be interconnected, allowing for the number of information processing devices that can communicate with each other, which was previously limited in a single distributed processing system. Beyond this, there is an excellent effect of enabling mutual communication between information processing devices.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram of a network address extension device according to an embodiment of the present invention. FIG. 2 is a block diagram of an expanded distributed processing system configured by an information processing device and a network coupling device connected to a loop-shaped transmission path including the network address expansion device of the present invention. FIG. 3 is a block configuration diagram of an expanded distributed processing system configured by an information processing device and a network coupling device connected to a path-like transmission path including the network address expansion device of the present invention. FIG. 4 shows a frame format of transmission data from an information processing device and a network coupling device including the network address extension device of the present invention. ■...Communication control unit, 2...Network control unit, 3
. . . transmission control unit, 4 . . . reception control unit, 5 . . . network address conversion control unit, 6 . 22.200-203...transmission line, 31
．． 301-303...Network coupling device, C...
・Control field, CNA...count network address, DAn...destination address, Fe8...
Frame check sequence, Fe...end flag,
Fs...Start flag, LK...Number of network connections, SAn...Source address, a, b...Address of information processing device, X1y,,z...Address of network connection device.

Claims (1)

[Claims] (1) In a network address expansion method that connects multiple independent distributed processing systems to each other and sets the network address of the expanded distributed processing system, the network address of each of the multiple independent distributed processing systems described above is used as is. The network address of the extended distributed processing system is set as the network address, and when transmitting data, the transmission route to the communication partner is specified in the transmission frame format based on the network address of the extended distributed processing system. network address extension method.