JPH0530120A - Local area network system - Google Patents

Abstract

PURPOSE:To attain unified management of plural networks. CONSTITUTION:A synchronizing loop LAN network 1 is formed by connecting sequentially nodes 1a-1d through a synchronizing transmission line 100. Stuff circuits 10a-10d and destuff circuits 11a-11d of the nodes 1a-1d are connected to each station connection section of wiring concentrators 20, 30, 40, 41, 50 of token ring networks 2-5 in existence at parted locations through a lobe cable.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a local area network system, and more particularly to a method of connecting a plurality of token ring networks existing at remote locations.

[0002]

2. Description of the Related Art Conventionally, in a token ring network, a station (terminal) connected to a token ring is connected to a concentrator (concentrator) by a special lobe cable. In addition, when expanding the number of stations at the same place in the token ring network, the concentrators are connected using a cable for ring expansion.

On the other hand, when expanding the number of stations when the stations are far apart, a relay device is used to connect the concentrators to extend the distance between the concentrators.

In such a conventional token ring network, a relay device is used to connect between concentrators when expanding the number of stations when the stations are far from each other. The token ring network formed in 1. will be managed independently, and the token ring network will not be centrally managed.

[0005]

SUMMARY OF THE INVENTION The present invention has been made to eliminate the above-mentioned problems of the conventional one, and an object thereof is to provide a local area network system capable of unifying management of a plurality of networks.

[0006]

A local area network system according to the present invention is a synchronous system for connecting a plurality of token ring networks existing at distant places and a plurality of nodes respectively connected to the plurality of token ring networks as stations. And a loop type transmission line.

[0007]

An embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention. In the figure, a network 1 is a synchronous loop type LAN (local area network),
The nodes 1a to 1d are sequentially connected via the synchronous transmission line 100. Stuff circuit 1 of each node 1a-1d
0a to 10d and the destuff circuits 11a to 11d are connected to the wiring ring concentrators 20, 30 of the token ring networks 2 to 5 by special lobe cables.
It is connected as a station to the station connection portions of 40, 41 and 50.

In the stuffing circuit 10a of the node 1a, the input data from the wiring concentrator 20 is simply treated as asynchronous data, and the input data is stuffed to be transmitted through the synchronous transmission line 100. The receiving side destuffs the node 1b. The circuit 11b destuffs the original data and outputs it to the wiring concentrator 30.

In the same manner as the above operation, the stuff circuit 10b of the node 1b and the destuff circuit 1 of the node 1c.
From the wiring concentrator 30 to the wiring concentrator 40 via 1c, the stuff circuit 10c of the node 1c and the destuff circuit 11 of the node 1d.
From the wiring concentrator 40 to the wiring concentrator 50 via d, the stuff circuit 10d of the node 1d and the destuff circuit 11a of the node 1a.
The wiring concentrator 50 is sequentially connected to the wiring concentrator 20 via. The wiring concentrators 40 and 41 are connected by a cable for ring expansion.

As a result, the network 1 connects the plurality of token ring networks 2 to 5 like one stroke. Therefore, it is possible to connect the token ring networks 2 to 5 which are respectively located at distant places by the network 1 without using a relay device, and the data transfer between them can be performed via the network 1.

As described above, the nodes 1a to 1d of the network 1 of the synchronous loop LAN are connected to the wiring concentrators 20 of the token ring networks 2 to 5, respectively.
By connecting to the station connection unit of 30, 40, 41, 50 as a station, a plurality of token ring networks 2 to 5 existing at distant locations can be connected without a relay device, and mutual connection can be achieved. Data transfer can be enabled. Therefore, the network 1 and the token ring networks 2 to 5 can be centrally managed.

[0013]

As described above, according to the present invention, by connecting a plurality of nodes of the network to a plurality of token ring networks existing at distant places as a station, the plurality of networks are unified. The effect is that it can be managed.

[Brief description of drawings]

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

[Explanation of symbols]

1 Network 2-5 Token Ring Network 10a-10d Stuff Circuit 11a-11d Destuff Circuit 20,30,40,41,50 Wiring Concentrator

Claims (1)

Claim: What is claimed is: 1. A synchronous loop type transmission, which connects a plurality of token ring networks existing at separate locations and a plurality of nodes connected as stations to the plurality of token ring networks, respectively. A local area network system characterized by comprising a road.