JP2805226B2 - Concentrator for ring network - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a configuration control of a ring network,
In particular, the present invention relates to a display system for displaying a connection state of a plurality of terminals to a concentrator in a line concentrator accommodating a plurality of terminal stations.

[Conventional technology]

In the conventional concentrator, provided at the front of the concentrator, regardless of the number of terminal stations connected to the concentrator,
It was displayed with one lamp of "failure". That is, depending on the state of the ring connection switch unit that connects and disconnects the ring trunk line of the concentrator and the ring branch line that connects the terminal station, the state where the ring branch line is connected to the ring trunk line is normal, and the disconnected state is abnormal. The "failure" lamp is extinguished in a normal state and lit in an abnormal state. However, under the lighting conditions of the “failure” lamp,
If the number of connected terminal stations is one, the faulty terminal could be identified at a glance, but if a plurality of terminal stations were connected, the faulty terminal station was selected from among them. It took a lot of time to identify.

[Problems to be solved by the invention]

In the above-mentioned conventional example, it is necessary for the user to specify the terminal in the failure state from a plurality of terminal stations by using only the “failure” lamp provided in front of the apparatus. A specific method at this time is to disconnect a plurality of terminal stations connected to the concentrator one by one with a connector connected to a ring branch line provided in the concentrator, and the fault continues even if the connector is disconnected. In this case, the connection connector was returned to its original state, and the next connection connector was unplugged and checked.
Therefore, before identifying the faulty terminal station,
It took a lot of time.

The present invention allows a user to be connected to a concentrator at a glance,
An object of the present invention is to provide a means for identifying a faulty terminal station from a plurality of terminal stations, for example, to promptly contact a maintenance company (maintenance staff) and to recover from the fault.

[Means for solving the problem]

The present invention provides a ring trunk connected between a plurality of concentrators in a ring shape, a ring branch connecting a plurality of terminal stations provided in the concentrator, and connection and disconnection of the ring trunk and the ring branch. A ring-type network concentrator having a ring connection switch unit, comprising: a test means for automatically detecting a failed terminal station from among a plurality of terminal stations; and a terminal detected by the test means. It is characterized in that the status of the station is visually or occupied.

[Action]

When the concentrator determines that a failure has occurred in the ring branch line, the concentrator operates to separate the abnormal ring of the own concentrator from the ring trunk. By this separation, the ring trunk becomes a closed ring. Thus, the terminal station connected to the ring branch can continue the intra-ring communication function. At this time, by turning on the lamp of the failure corresponding to the separated terminal station, the user can specify the terminal station in which the failure has occurred.

〔Example〕

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

FIG. 1 is an overall configuration diagram of a system related to the present embodiment.

In FIG. 1, 1 is a concentrator, 5 is a terminal station, 6 and 7 constitute a double transmission line, 6 is a ring trunk,
Reference numeral 7 denotes a ring subline, which forms a closed ring (closed loop). Inside the concentrator 1, reference numerals 2, 3 and 4 denote a ring connection switch unit, a ring connection state display unit, and a main control unit for controlling the entire concentrator, which are parts of the present invention. 8
Is a ring branch line, 9 is a communication control unit connected to the ring trunk line, and 10 is a communication control unit connected to the ring sub line.
Reference numeral 12 denotes a coupler (connector) for connecting the terminal station 5 to the concentrator 1.

FIG. 2 is a diagram showing an internal configuration of the line concentrator 1. 13
Denotes a drive unit of a relay for operating the ring connection switch unit 2, and 13 and 2 are physically integrated. Reference numeral 14 denotes a lamp provided in the ring connection state display unit 3.

Hereinafter, the operation of this embodiment will be described. In FIG. 2, the ring connection switch unit 2 of the line concentrator 1 is configured so that the data signal on the ring trunk line 6 flows to the ring branch line 8 side.
The ring branch line 8 is configured and connected so as to be drawn into the ring trunk line 6. Thus, for example, terminal station 5
When (a) communicates with another terminal station connected to the ring, the data signal flowing on the ring trunk 6 is transmitted via the ring connection switch 2 and the coupler (connector) 12 to the terminal station 5 (a). )to go into. (Route) Also, the data signal can be repeated on the route transmitted from the terminal station 5 (a).
Can communicate with other terminal stations. In addition, the data signal of the branch line to which the terminal station is not connected is looped back by the coupler 12 to form a closed loop of the ring trunk line 6.
The details of the combiner 12 are described in “Token, Ring, Access,
Method, And, Physical, Layer, Specification, Eye, E, E, E, Standard 80
2, 5-1985 "and are well known.

A novel part of the present invention is a mechanism for opening and closing the ring connection switch unit 2, and a mechanism corresponding to the ring connection switch unit 2.
This is a lighting method of a lamp 14 provided in the ring connection state display unit 3.

In FIG. 2, when a data signal flowing on the ring trunk line 6 is normally detected by the communication control unit 9 (a) of the concentrator 1 and abnormally detected by the communication control unit 9 (b), the concentrator 1 Of the terminal station 5 connected to the concentrator 1, the communication control unit 9
In (b), it is determined that normal detection was not possible. At this time, the main control unit 4 activates the 15 CHG signals,
, The contacts chg0, chg1, chg2, chg3 physically integrated with the CHG relay 16 are operated, and a closed ring (closed loop) is formed in the concentrator 1 together with the ring trunk line 6 and the ring sub line 7. Configure. FIG. 3 shows a state in which the closed ring (closed loop) is formed in the concentrator 1.

Hereinafter, a method of detecting the terminal station 5 which is in trouble will be described with reference to FIG. The main control unit 4 outputs a data signal from the communication control unit 10 provided on the ring sub line 7. The data signal from the communication control unit 10 passes through the contacts chg3 and chg0 of the CHG relay 15, passes through the ring connection switch 2, and is repeated at the terminal station 5 (a).
To the next terminal station 5 (b), etc., the ring trunk line 6
Is transmitted to the communication control unit 9 (b) connected to the communication control unit 9b. At this time,
Assuming that the terminal station 5 (b) has caused a failure, the communication control unit 9 (b) connected to the ring trunk 6
The data signal does not reach the device, and it is recognized that a failure has occurred. Next, the main control unit 4 drives the A relay 13 and
The terminal station 5 (a) is separated by the ring connection switch section 2 by operating the ring connection switch section 2 (a section) physically integrated with the terminal station 5 (a). The main control unit 4 includes a terminal station 5
With (a) disconnected, a data signal is output again,
Recognize that the fault condition does not recover. Next, the main control unit 4
Returns the drive state of the A relay 13 to the initial state, connects the terminal station 5 (a) to the ring trunk 6, disconnects the terminal station 5 (b), and outputs a data signal again. At this time, the terminal station 5 (b), which is the fault, is disconnected from the ring trunk, so that the data signal output again can be normally detected by the communication control unit 9 (b) connected to the ring trunk 6. At this time,
The B lamp of the lamp 14 in the ring connection state display unit 3 provided corresponding to the ring connection switch unit 2 is turned on, and a buzzer sounds to notify the user. Note that the main control unit 4 is a terminal station 5 having a fault.
(B) is kept disconnected from the ring trunk using the ring connection switch 2 (b), the CHG signal is returned to the non-active state, and the ring trunk 6 and the ring sub-line 7 in the concentrator 1 are returned to their original state. Return to the state.

〔The invention's effect〕

ADVANTAGE OF THE INVENTION According to this invention, the terminal station which becomes an obstacle can be specified automatically from the terminal stations connected to the line concentrator. In addition, by displaying the faulty terminal station on the display unit, the user can be notified.

[Brief description of the drawings]

FIG. 1 is an overall configuration diagram of a ring system according to an embodiment of the present invention, FIG. 2 is an internal configuration diagram of a concentrator, and FIG. . 1. Concentrator, 2. Ring connection switch unit, 3.
Ring connection status display unit, 4 ... Main control unit, 5 ... Terminal station, 6 ... Ring trunk line, 7 ... Ring sub line, 8
... Ring branch line, 9,10 ... Communication control unit.

──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Tohru Watanabe 94, Kojiyama-shi, Fukushima Prefecture, in the area of Hitachi Telecom Technology Co., Ltd. (56) References JP-A-60-117849 (JP, A) JP-A-60- 167541 (JP, A) JP-A-61-187444 (JP, A) JP-A-61-208338 (JP, A) JP-A-61-239745 (JP, A) JP-A-62-169543 (JP, A) JP-A-62-258536 (JP, A) JP-A-63-84229 (JP, A) JP-A-3-104448 (JP, A) Hitachi Review, Vol. 69, No. 9, Hisashi Matsumura et al. Trends and Hitachi Token Ring Network "PP. 37-44, September 25, 1987 Mitsubishi Cable Industries Time Report, Vol. 77, Hiroshi Ishihara et al., “Development of Concentrator for Token Ring LAN (1)” PP. 23-29, April 1, 1989 (58) Fields surveyed (Int. Cl. ⁶ , DB name) H04L 12/42-12/437 JICST file (JOIS) WPI (DIALOG)

Claims (2)

(57) [Claims] 1. A concentrator connected to a ring network connecting a plurality of concentrators in a ring shape by a ring trunk and a ring sub-line, wherein: an internal ring trunk connected to the ring trunk; A connection switch unit provided for each of a plurality of ring branch lines connecting a terminal station and a plurality of ring branch lines connecting terminal stations, wherein the ring branch line is connected to the in-device ring trunk line, or A plurality of ring connection switch units for separating a ring branch line from the internal ring trunk; a first communication control unit connected to an upstream portion of the internal ring trunk and receiving a data signal flowing through the internal ring trunk; A second communication control unit connected to a downstream portion of the in-device ring trunk and receiving a data signal flowing through the in-device ring trunk; And a changeover switch unit provided in an upstream part of the internal ring sub-line and in a downstream part of the internal ring trunk and the internal ring sub-line, wherein the first communication control unit When the normal communication is recognized and the second communication control device recognizes the data abnormality, the internal ring trunk and the internal ring sub-line are disconnected from the ring main and the sub-line. ,
By the device ring main line and the device ring subline,
A changeover switch unit that forms a ring-shaped communication path in the device, and a switch that is connected to the ring sub-line in the device and forms a ring-shaped communication path in the device by the changeover switch unit. A third communication control unit that outputs a data signal to a ring trunk, and the plurality of ring connection switch units are sequentially operated, and the plurality of ring branch lines are sequentially disconnected from the in-device ring trunk, and the third communication control unit. The second communication control unit determines whether or not the data signal output by the communication control unit has been normally received, and a failure detection unit that detects a ring branch line that has failed, and the failure detection unit has detected the failure. A line information concentrator for a ring-shaped network, comprising: a fault information display unit for visually displaying fault information including a fault location. 2. The line concentrator according to claim 1, wherein said fault information display means comprises a plurality of fault display lamps corresponding to each of said plurality of ring branch lines.