GB2253976A - Method and system for transferring supervisory right requierment in submarine cable communication network system - Google Patents
Method and system for transferring supervisory right requierment in submarine cable communication network system Download PDFInfo
- Publication number
- GB2253976A GB2253976A GB9203454A GB9203454A GB2253976A GB 2253976 A GB2253976 A GB 2253976A GB 9203454 A GB9203454 A GB 9203454A GB 9203454 A GB9203454 A GB 9203454A GB 2253976 A GB2253976 A GB 2253976A
- Authority
- GB
- United Kingdom
- Prior art keywords
- signal
- station
- stations
- received
- supervisory
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/40—Monitoring; Testing of relay systems
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Monitoring And Testing Of Transmission In General (AREA)
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
- Optical Communication System (AREA)
Abstract
a) Method and system for avoiding two different stations simultaneously carrying out monitoring of a repeater, in a network system for communication by submarine cables. b) Each station (11, 12, 13) includes a means (21) for generating a request to send the signal requesting monitoring rights; a sending means (12) for sending to the station which, with respect to it, are situated on the other side of a repeater, a specific signal representing this request; a reception means (23) coupled to each of the submarine cables (14, 15, 16) so as to receive therefrom the request signal for the monitoring rights; and a decision means (24) for deciding whether the signal received is equal to the specific signal and, in this case, the specific station receives the monitoring rights. c) The invention applies to submarine cables and makes it possible to organise monitoring of repeaters. <IMAGE>
Description
METHOD AND SYSTEM FOR TRANSFERRING
SUPERVISORY RIGHT REQUIREMENT IN SUBMARINE
CABLE COMMUNICATION NETWORK SYSTEM
Background of the Invention;
The present invention relates to a method and a system for transferring a supervisory right requirement signal between stations in a submarine cable communication network system.
In a submarine cable communication network system, a plurality of stations are connected to each other through submarine cables including repeaters. It is necessary in the system that those stations supervise the repeaters. When some of stations carry out the supervisory action for a single repeater at the same time, the supervising is confused due to collision of supervisory action. In order to avoid the confusion, a supervisory right for a repeater is selectively given to a single station at a time by use of different signals representative of the supervisory right requirement assigned to the stations. The different signals are collectively referred to as supervisory right requirement signal or a supervisory action flag signal.
Those stations are arranged in a circular loop for transferring the supervisory right requirement signal one after another as from one station to an adjacent station through submarine cables between adjacent stations. A particular one of the stations desires to acquire the supervisory right, the particular station sends out the supervisory right requirement signal assigned thereto to the adjacent one of the station. The supervisory right requirement signal is circulated through the loop and returns to the particular station.
After confirmation of the return, the particular station acquires the supervisory right.
In the known system using the transferring circular loop, it is impossible to transfer the supervisory right requirement signal when any fault occurs in the circular loop, for example, any one of cables is broken. As a result, the particular station cannot acquire the supervisory right. Usually, a public line is used as a-back-up line, but the supervisory right cannot be acquired by any stations if there is no public telephone line.
Summary of the Invention:
Accordingly, it is an object of the present invention to provide a method and a system for transferring the supervisory right requirement signal in the submarine cable communication network system which enables to transfer the supervisory right requirement signal between stations when any fault occurs in the circular loop and when there is not back-up line.
The present invention is directed to a method for transferring a supervisory right requirement signal in a submarine cable communication network system comprising a plurality of stations. A particular one of the stations is connected with other ones of the stations as opposite stations through submarine cables including repeaters.
The method comprises steps of: the particular station transmitting a particular signal representative of the supervisory right requirement assigned thereto to the opposite stations through the submarine cables extending from the particular station; each of the opposite stations receiving the particular signal as a received particular signal and discriminating from the received particular signal that the particular signal being transmitted from the particular station to return the received particular signal to the particular station as a specific signal; and the particular station receiving the specific signal as a received specific signal and discriminating the received specific signal being equal to the particular signal to acquire the supervisory right for the repeaters included in the submarine cables.
According to the present invention, a system is obtained which is for transferring a supervisory right requirement signal in a submarine cable communication network system comprising a plurality of stations, a particular one of the stations being connected with other ones of the stations as opposite stations through submarine cables including repeaters.The particular station comprises: means for generating a request for sending the supervisory right requirement signal according to requirement of supervisory of the repeaters; first sending means coupled to the generating means and responsive to the request for sending a particular signal representative of the supervisory requirement assigned thereto to the opposite stations through the submarine cables; first receiving means coupled to each of the submarine cables for receiving a specific signal from each of the opposite stations as a received specific signal; and first discriminating means coupled to the first receiving means and responsive to the received specific signal for discriminating whether or not the received specific signal being equal to the particular signal, the particular station acquiring a right for supervisory of the repeaters when the specific signal is equal to the particular signal.Each of the opposite stations comprises: second receiving means coupled to one or more submarine cables for receiving the supervisory right requirement signal incoming through the one or more submarine cables as a received signal; second discriminating means coupled to the second receiving means and responsive to the received signal for discriminating whether or not the received signal is sent from the particular station, the second discriminating means producing a return signal when the received signal is transmitted from the particular station; and second sending means coupled to the second discriminating means and responsive to the return signal for sending the received signal as the specific signal to the particular station.
According to the present invention, a station is also provided for use in a submarine cable communication network system. The station is connected to opposite stations through submarine cables including repeaters.
The station comprises means for generating a request for sending the supervisory right requirement signal according to requirement of supervisory of the repeaters; sending means coupled to the generating means and responsive to the request for sending a particular signal representative of the supervisory right requirement assigned thereto to the opposite stations through the submarine cables; receiving means coupled to the each of the submarine cables for receiving the supervisory right requirement signal incoming through the each submarine cable as a received signal; and discriminating means coupled to the receiving means and responsive to the received signal for discriminating whether or not the received signal is equal to the particular signal, the particular station acquiring a right for supervisory of the repeaters when the received signal is equal to the particular signal, the discriminating means discriminating which one of the opposite stations is a source station of the received signal when the received signal is not equal to the particular signal and producing a return signal; the sending means coupled to the discriminating means and responsive to the return signal for sending the received signal to the source station.
Brief Description of the Drawings:
Fig. 1 is a schematic diagram of a submarine cable communication network system for illustrating a method for transferring supervisory right requirement signal according to an embodiment of the present invention;
Fig. 2 is a schematic diagram view of the submarine cable communication network system comprising the supervisory right requirement signal transferring system according to one embodiment of the present invention; and
Fig. 3 is a flow chart illustrating operation of the system in Fig. 2.
Description of Preferred Embodiments:
Referring to Fig. 1, the system shown therein comprises three stations 11, 12 and 13 which are connected by three submarine cables 14, 15 and 16 to each other to form a circular loop. The submarine cables 14, 15 and 16 include repeaters 17, 18 and 19, respectively, as shown in the figure.
According to a method of the present invention, when a particular one of the stations, for example, the station 11 desires the supervisory right, the particular station 11 transmits a particular signal representative of the supervisory. right requirement assigned thereto to all the opposite stations 12 and 13 through the submarine cables 14 and 15, respectively, as shown by arrows shown at A.
Each of the opposite stations 12 and 13 receives the particular signal A as a received particular signal.
Each of opposite stations 12 and 13 discriminates from the received particular signal that the particular signal is transmitted from the particular station 11. Then, each of the stations 12 and 13 returns the received particular signal to the particular station 11 as a specific signal as shown by arrows shown at B.
The particular station 11 receives the specific signal B from each of the stations 12 and 13 as a received specific signal. When the particular station 11 discriminates that the received specific signal is equal to the particular signal, the particular station 11 acquires the supervisory right for the repeaters 17 and 18 included in the submarine cables 14 and 15.
According to the method, the particular station 11 can acquire the supervisory right without any back-up line when any fault occurs at point F in the submarine cable 16 connecting between stations 12 and 13.
The above description is analogous to a case where each of stations 12 and 13 desires to acquire the supervisory right.
Referring to Fig. 2, the system of Fig. 1 is shown in detail. As shown in the figure, stations 11, 12 and 13 are arranged in the similar structure.
Accordingly, station 11 is described in detail and structures of other stations 12 and 13 are not described but are illustrated by use of the same reference numbers in station 11.
Station 11 comprises a controller 21, a sending circuit 22, a transmitter/receiver 23, and a signal discriminator 24.
The controller 21 is means for generating a request for sending the supervisory right requirement signal according to requirement of supervisory of the repeaters.
The sending circuit 22 is coupled to the controller 21. Responsive to the request from the controller 21, the sending circuit 22 sends a particular signal representative of the supervisory right requirement assigned thereto through the transmitter/receiver 23 onto the submarine cables 14 and 15 as the signals.A as shown in Fig. 1.
On the other hand, the transmitter/receiver 23 receives the supervisory right requirement signal incoming through each of the submarine cables 14 and 15 as a received signal.
The signal discriminator 24 is coupled to the transmitter/receiver 23. Responsive to the received signal from the transmitter/receiver 23, the signal discriminator 24 discriminates whether or not the received signal is equal to the particular signal. When the received signal is equal to the particular signal, the station 11 acquires a right for supervisory of the repeaters 17 and 18.
When the received signal is not equal to the particular signal, the signal discriminator 24 discriminates which one of the opposite stations 12 and 13 is a source station of the received signal and delivers a return signal to the sending circuit 22.
The sending circuit 22 is responsive to the return signal and sends out the received signal to the source station.
Now, referring to Fig. 3, description will be made as regards operation of the system of Fig. 2 in connection with a case where the station 11 desires acquirement of the supervisory right.
At the station'll, the controller 21 generates the request for sending the supervisory right requirement signal according to requirement of supervisory of the repeaters 17 and 18 (step S1).
The sending circuit 22 is responsive to the request and sends the particular signal representative of the supervisory requirement assigned thereto to opposite stations 12 and 13 through the transmitter/receiver 23 and through the submarine cables 14 and 15, respectively (step S2).
At each of the opposite stations 12 and 13, transmitter/receiver 23 receives the supervisory right requirement signal incoming through the submarine cables 14 and 15 as a received signal (step S'3 and S"3).
The signal discriminator 24 in each of stations 12 and 13 discriminates whether or not the received signal is sent from the station 11 as a source station (steps S'4 and S"4). When the received signal is transmitted from the station 11, the signal discriminator 24 delivers a return signal to the sending circuit 22 in each of the stations 12 and 13.
The sending circuit 22 in each of the stations 12 and 13 is responsive to the return signal and sends the received signal as the specific signal B in Fig. 1 to the station 11 (steps S'5 and So5).
At the station 11, the transmitter/receiver 23 receives the specific signal from each of the stations 12 and 13 as a received specific signal (step 56).
The signal discriminator 24 in the station 11 discriminates whether or not the received specific signal is equal to the particular signal (step S7). When the specific signal is equal to the particular signal, the station 11 acquires a right for supervisory of the repeaters 17 and 18.
In Fig. 3,.a term "flag" is used for the terms "the supervisory right requirement signal" for the purpose of simplification of the figure.
The above mentioned description of operation of the system in Fig. 2 is similarly applicable to another case where another one of stations 12 and 13 desires to acquire the supervisory right.
The present invention has been described in connection with the submarine cable communication network system having three stations. However, it will be understood that the present invention is applicable to the system having more than three stations.
Claims (3)
1. A method for transferring a supervisory right requirement signal in a submarine cable communication network system comprising a plurality of stations, a particular one of said stations being connected with other ones of said stations as opposite stations through submarine cables including repeaters, the method comprising steps of:
said particular station transmitting a particular signal representative of the supervisory right requirement assigned thereto to said opposite stations through said submarine cables extending from said particular station;
each of said opposite stations receiving said particular signal as a received particular signal and discriminating from said received particular signal that the particular signal being transmitted from said particular station to return the received particular signal to the particular station as a specific signal; and
said particular station receiving said specific signal as a received specific signal and discriminating the received specific signal being equal to said particular signal to acquire the supervisory right for said repeaters included in the submarine cables.
2. A system for transferring a supervisory right requirement signal in a submarine cable communication (Claim 2 continued) network system comprising a plurality of stations, a particular one of said stations being connected with other ones of said stations as opposite stations through submarine cables including repeaters, wherein said particular station comprises::
means for generating a request for sending the supervisory right requirement signal according to requirement of supervisory of said repeaters;
first sending means coupled to said generating means and responsive to said request for sending a particular signal representative of said supervisory requirement assigned thereto to said opposite stations through said submarine cables;
first receiving means coupled to said each of said submarine cables for receiving a specific signal from each of said opposite stations as a received specific signal; and
first discriminating means coupled to said first receiving means and responsive to said received specific signal for discriminating whether or not said received specific signal being equal to said particular signal, said particular station acquiring a right for supervisory of said repeaters when said specific signal is equal to said particular signal, and
each of said opposite stations comprises::
second receiving means coupled to one or more submarine cables for receiving the supervisory right (Claim 2 twice continued) requirement signal incoming through said one or more submarine cables as a received signal;
second discriminating means coupled to said second receiving means and responsive to said received signal for discriminating whether or not said received signal is sent from said particular station, said second discriminating means producing a return signal when said received signal is transmitted from said particular station; and
second sending means coupled to said second discriminating means and responsive to said return signal for sending said received signal as said specific signal to said particular station.
3. A station for use in a submarine cable communication network system wherein said station is connected to opposite stations through submarine cables including repeaters, said station comprising:
means for generating a request for sending the supervisory right requirement signal according to requirement of supervisory of said repeaters;
sending means coupled to said generating means and responsive to said request for sending a particular signal representative of said supervisory right requirement assigned thereto to said opposite stations through said submarine cables; ;
receiving means coupled to said each of said submarine cables for receiving the supervisory right (Claim 3 continued) requirement signal'incoming through said each submarine cable as a received signal, and
discriminating means coupled to said receiving means and responsive to said received signal for discriminating whether or not said received signal is equal to said particular signal, said particular station acquiring a right for supervisory of said repeaters when said received signal is equal to said particular signal, said discriminating means discriminating which one of said opposite stations is a source station of said received signal when said received signal is not equal to said particular signal and producing a return signal;
said sending means coupled to said discriminating means and responsive to said return signal for sending said received signal to said source station.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4403591A JP3098265B2 (en) | 1991-02-18 | 1991-02-18 | Monitoring activity flag transfer method for submarine cable communication system |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| GB9203454D0 GB9203454D0 (en) | 1992-04-01 |
| GB2253976A true GB2253976A (en) | 1992-09-23 |
| GB2253976B GB2253976B (en) | 1995-02-01 |
Family
ID=12680375
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB9203454A Expired - Fee Related GB2253976B (en) | 1991-02-18 | 1992-02-18 | Method and system for transferring supervisory right requirement in submarine cable communication network system |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP3098265B2 (en) |
| FR (1) | FR2673056B1 (en) |
| GB (1) | GB2253976B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0497973U (en) * | 1991-01-17 | 1992-08-25 |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4586186A (en) * | 1983-08-08 | 1986-04-29 | At&T Bell Laboratories | Maintenance response signalling arrangement for a digital transmission system |
| EP0392245B1 (en) * | 1989-04-13 | 1994-12-28 | Siemens Aktiengesellschaft | Automatic addressing of monitoring and/or control processing units comprised in a digital information transmission system |
| JPH1029137A (en) * | 1996-07-10 | 1998-02-03 | Nakamura Tome Precision Ind Co Ltd | Strain adjusting device for lathe |
-
1991
- 1991-02-18 JP JP4403591A patent/JP3098265B2/en not_active Expired - Fee Related
-
1992
- 1992-02-18 FR FR9201830A patent/FR2673056B1/en not_active Expired - Fee Related
- 1992-02-18 GB GB9203454A patent/GB2253976B/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH04263522A (en) | 1992-09-18 |
| JP3098265B2 (en) | 2000-10-16 |
| FR2673056A1 (en) | 1992-08-21 |
| FR2673056B1 (en) | 1994-02-25 |
| GB2253976B (en) | 1995-02-01 |
| GB9203454D0 (en) | 1992-04-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4580291A (en) | Method for processing digital signals, and subscriber station for telecommunication and teledistribution | |
| US5150243A (en) | Method and apparatus for monitoring an optical network interface | |
| KR900006322B1 (en) | Digital network system having arrangement for testing digital subscriber line | |
| US5946303A (en) | Automatic configuration of a remote communication interface via the alarm indication signal | |
| US5212534A (en) | Distance-measuring method and transmitting and receiving station for carrying out the same | |
| JPS60232744A (en) | Communication system | |
| EP0107696B1 (en) | Apparatus for connecting digital terminals to a digital exchange | |
| US6112230A (en) | Communication system for information exchange between master and slave stations using frames having organization, request and communication channels | |
| JPH04291527A (en) | Data link system | |
| GB2253976A (en) | Method and system for transferring supervisory right requierment in submarine cable communication network system | |
| JP2632550B2 (en) | ISDN subscriber wireless communication system | |
| US5661467A (en) | Method and system for transferring supervisory right requirement in submarine cable communication network system | |
| JP3354620B2 (en) | AV network | |
| KR100214146B1 (en) | Dual apparatus for controlling data communication | |
| Kojima et al. | Visual communication system in an apartment house using fiber optics | |
| JPS5932022B2 (en) | How to connect and configure regulated ground identification devices | |
| KR100287423B1 (en) | Wireless Signal Transceiver in Optical Subscriber Transmitter | |
| GB2154397A (en) | Data communication system incorporating network management information arrangements | |
| JPS5972853A (en) | Facsimile exchange system | |
| JP2908181B2 (en) | Communication device | |
| JPH0418822A (en) | Satellite communication equipment | |
| JPH10308765A (en) | Circuit switched connection service controller | |
| JPH04310035A (en) | Omnibus teleprinter system | |
| JPS6282841A (en) | Multiple dwelling house provided with information communication system | |
| JPH04188928A (en) | Data modem for omnibus teleprinter system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 20020218 |