DE3478377D1 - Redundant switchover system for a tdma satellite communication equipment - Google Patents

Redundant switchover system for a tdma satellite communication equipment

Info

Publication number
DE3478377D1
DE3478377D1 DE8484301774T DE3478377T DE3478377D1 DE 3478377 D1 DE3478377 D1 DE 3478377D1 DE 8484301774 T DE8484301774 T DE 8484301774T DE 3478377 T DE3478377 T DE 3478377T DE 3478377 D1 DE3478377 D1 DE 3478377D1
Authority
DE
Germany
Prior art keywords
communication equipment
satellite communication
switchover system
tdma satellite
redundant switchover
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.)
Expired
Application number
DE8484301774T
Other languages
German (de)
English (en)
Inventor
Shinichiro Aoki
Ryushiro Yoshizawa
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fujitsu Ltd
Original Assignee
Fujitsu Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Fujitsu Ltd filed Critical Fujitsu Ltd
Application granted granted Critical
Publication of DE3478377D1 publication Critical patent/DE3478377D1/de
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/74—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission for increasing reliability, e.g. using redundant or spare channels or apparatus
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/14—Relay systems
    • H04B7/15—Active relay systems
    • H04B7/204—Multiple access
    • H04B7/212—Time-division multiple access [TDMA]

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Radio Relay Systems (AREA)
  • Detection And Prevention Of Errors In Transmission (AREA)
DE8484301774T 1983-03-16 1984-03-15 Redundant switchover system for a tdma satellite communication equipment Expired DE3478377D1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP58043801A JPS59169229A (ja) 1983-03-16 1983-03-16 二重化切換制御方式

Publications (1)

Publication Number Publication Date
DE3478377D1 true DE3478377D1 (en) 1989-06-29

Family

ID=12673847

Family Applications (1)

Application Number Title Priority Date Filing Date
DE8484301774T Expired DE3478377D1 (en) 1983-03-16 1984-03-15 Redundant switchover system for a tdma satellite communication equipment

Country Status (4)

Country Link
US (1) US4597079A (https=)
EP (1) EP0119841B1 (https=)
JP (1) JPS59169229A (https=)
DE (1) DE3478377D1 (https=)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4825435A (en) * 1985-11-08 1989-04-25 Digital Equipment Corp. Multiport repeater
JPS62253231A (ja) * 1986-01-07 1987-11-05 Fujitsu Ltd 現用予備切換システム
JPH0712161B2 (ja) * 1986-11-28 1995-02-08 日本電気株式会社 多方向多重通信システム
EP0318911B1 (en) * 1987-11-30 1993-05-19 Nec Corporation Frame-interval fault detection in a demand assignment tdma communication system
US4964105A (en) * 1988-11-01 1990-10-16 Dsc Communications Corporation Replacement switch
GB9026932D0 (en) * 1990-12-12 1991-01-30 Plessey Telecomm Tdma ranging
JPH05114905A (ja) * 1991-04-08 1993-05-07 Digital Equip Corp <Dec> 単一アドレス及びプロトコール・テーブル・ブリツジを使用したメツセージの処置フイルタリング
JP3032044B2 (ja) * 1991-05-31 2000-04-10 国際電気株式会社 無瞬断スイッチ切替方式
JPH09503892A (ja) * 1993-07-30 1997-04-15 インターナショナル マルチメディア コーポレイション 軌道下高高度通信装置
US20030236070A1 (en) 2002-06-25 2003-12-25 Seligsohn Sherwin I. Sub-orbital, high altitude communications system
US5663957A (en) * 1995-07-12 1997-09-02 Ericsson Inc. Dual mode satellite/cellular terminal
DE19728061C2 (de) * 1997-07-01 2002-10-24 Deutsche Telekom Ag Verfahren zur Steuerung der Nutzung von Satelliten-Übertragungskapazität zum Ersetzen gestörter Datenleitungen in terrestrischen Netzen und Schaltungsanordnung zur Durchführung des Verfahrens
JP3602962B2 (ja) * 1998-03-12 2004-12-15 富士通株式会社 伝送装置
US6327243B1 (en) * 1998-08-03 2001-12-04 Samsung Electronics Co., Ltd. System and method for performing a seamless switchover from a primary packet router to a secondary packet router
US6249677B1 (en) * 1998-11-30 2001-06-19 Hughes Electronics Corporation Apparatus and method for delivering key information of a channel request message from a user terminal to a network

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2158836B1 (de) * 1971-11-26 1973-02-01 Siemens Ag, 1000 Berlin U. 8000 Muenchen Meßanordnung zur Erfassung der Bitfehlerrate und der Burstausfallrate in TDMA Systemen
US4054753A (en) * 1975-10-20 1977-10-18 Digital Communications Corporation Double sync burst TDMA system
US4397018A (en) * 1979-10-17 1983-08-02 Ibm Corporation Baton passing method and apparatus for maintaining synchronization in a TDMA satellite communication system

Also Published As

Publication number Publication date
EP0119841A3 (en) 1985-11-21
EP0119841B1 (en) 1989-05-24
US4597079A (en) 1986-06-24
JPS59169229A (ja) 1984-09-25
EP0119841A2 (en) 1984-09-26
JPS643100B2 (https=) 1989-01-19

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Legal Events

Date Code Title Description
8339 Ceased/non-payment of the annual fee