JPS5797248A - Satellite simultaneous communication system - Google Patents

Satellite simultaneous communication system

Info

Publication number
JPS5797248A
JPS5797248A JP55172743A JP17274380A JPS5797248A JP S5797248 A JPS5797248 A JP S5797248A JP 55172743 A JP55172743 A JP 55172743A JP 17274380 A JP17274380 A JP 17274380A JP S5797248 A JPS5797248 A JP S5797248A
Authority
JP
Japan
Prior art keywords
reception
retransmission
data block
transmission
response
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.)
Pending
Application number
JP55172743A
Other languages
Japanese (ja)
Inventor
Toyofumi Takenaka
Kenichi Mase
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.)
Nippon Telegraph and Telephone Corp
Original Assignee
Nippon Telegraph and Telephone Corp
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 Nippon Telegraph and Telephone Corp filed Critical Nippon Telegraph and Telephone Corp
Priority to JP55172743A priority Critical patent/JPS5797248A/en
Publication of JPS5797248A publication Critical patent/JPS5797248A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L2001/0092—Error control systems characterised by the topology of the transmission link
    • H04L2001/0093—Point-to-multipoint

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Detection And Prevention Of Errors In Transmission (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)
  • Radio Relay Systems (AREA)

Abstract

PURPOSE:To retransmit data blocks, after retransmission start informing blocks are transmitted, by stopping the continuous transmission of the data blocks from a transmission earth station, when the number of response of normal reception confirmation from a plurality of reception earth stations is less than the predetermined number. CONSTITUTION:When a transmitter 11 recieves a response from a plurality of reception stations via a line 12, the types of response is discriminated at a specific block generation detection section (BGD)22 and the number of responses A for normal reception confirmation is informed to a data block reception success discriminating section (ACT)24. The ACT24 receiving the information compares the number of responses of normal reception confirmation with the number of reception guarantee earth stations, and when the former is less than the latter, the retransmission request is informed to a transmission control section (DTC)15. The DTC15 receiving the information of the retransmission request abolishes the data block of a data block buffer (DBM)19 and requests for retransmission of data block to a terminal via a line 13. The DTC15 requests for transmission of a retransmission start informing block R to a BGD22 and transmits the R via the line 12.
JP55172743A 1980-12-08 1980-12-08 Satellite simultaneous communication system Pending JPS5797248A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55172743A JPS5797248A (en) 1980-12-08 1980-12-08 Satellite simultaneous communication system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55172743A JPS5797248A (en) 1980-12-08 1980-12-08 Satellite simultaneous communication system

Publications (1)

Publication Number Publication Date
JPS5797248A true JPS5797248A (en) 1982-06-16

Family

ID=15947488

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55172743A Pending JPS5797248A (en) 1980-12-08 1980-12-08 Satellite simultaneous communication system

Country Status (1)

Country Link
JP (1) JPS5797248A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5594490A (en) * 1994-05-23 1997-01-14 Cable Services Technologies, Inc. System for distributing video/audio files from central location to a plurality of cable headends
US5838668A (en) * 1995-06-13 1998-11-17 Fujitsu Limited Satellite broadcast communications system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5594490A (en) * 1994-05-23 1997-01-14 Cable Services Technologies, Inc. System for distributing video/audio files from central location to a plurality of cable headends
US5838668A (en) * 1995-06-13 1998-11-17 Fujitsu Limited Satellite broadcast communications system

Similar Documents

Publication Publication Date Title
US4882765A (en) Data transmission system
GB2019167B (en) Monitoring system for optical transmission line repeaters
CA1180412A (en) Alarm data concentration and gathering system
WO2002037890A3 (en) Method and apparatus for adaptive transmission control in a high data rate communication system
CA2051212C (en) Packet data communication system
ES8106993A1 (en) System for conveying information between a transmitting centre and receiving stations, the system being provided with control means for gaining access to the conveyed information.
JPS62107542A (en) Radio communication system
HK1084544A1 (en) Method and apparatus for transmission rate modification of communication channels
MY101408A (en) Hf data communications system
EP0986214A3 (en) Communication control method and transmission apparatus
AU588622B2 (en) Method and circuit arrangement for the transmission of data signals between control devices connected to one another via a loop system
GB2106358A (en) Method of multiple signal collision detection on a transmission line
GB9919920D0 (en) Apparatus and method for wireless communication
JPS55120249A (en) Multiple address communication system
JPS5797248A (en) Satellite simultaneous communication system
JPS5534532A (en) Communication system
JPS6230439A (en) Radio communication system
JPS6423643A (en) Communication system
JPS56104558A (en) Switching system of multitransmission line
JPS568957A (en) Facsimile communication system
JPS58201465A (en) Facsimile communication system
JPS5616350A (en) Data transmitting system
JPS57178447A (en) Loop data transmission system
JPS5739646A (en) Interruption controlling system during communication
JPS637699B2 (en)