JPS562765A - Unidirectional multiple address communication system - Google Patents
Unidirectional multiple address communication systemInfo
- Publication number
- JPS562765A JPS562765A JP7893579A JP7893579A JPS562765A JP S562765 A JPS562765 A JP S562765A JP 7893579 A JP7893579 A JP 7893579A JP 7893579 A JP7893579 A JP 7893579A JP S562765 A JPS562765 A JP S562765A
- Authority
- JP
- Japan
- Prior art keywords
- station
- transmission
- receiving station
- negative acknowledge
- lower receiving
- 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
- H04H—BROADCAST COMMUNICATION
- H04H20/00—Arrangements for broadcast or for distribution combined with broadcast
- H04H20/12—Arrangements for observation, testing or troubleshooting
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/02—Details
- H04L12/16—Arrangements for providing special services to substations
- H04L12/18—Arrangements for providing special services to substations for broadcast or conference, e.g. multicast
- H04L12/1863—Arrangements for providing special services to substations for broadcast or conference, e.g. multicast comprising mechanisms for improved reliability, e.g. status reports
- H04L12/1868—Measures taken after transmission, e.g. acknowledgments
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Data Exchanges In Wide-Area Networks (AREA)
Abstract
PURPOSE:To reduce the number of retransmissions from the transmission station to shorten the transmission time, by providing a response proportion comparing means and a retransmission frequency check means in the upper station to avoid retransmitting the same information till disappearance of negative acknowledge. CONSTITUTION:Upper receiving station 5 is provided with receiving signal analyzing part 501 which analyzes signals received from the transmission station, signal distribution part 502 which distributes analyzed signals to lower receiving station 8, negative acknowledge proportion comparing part 503 which counts response signals from lower receiving station 8 to detect the proportion, and retransmission frequency check part 504 which monitors the retransmission frequency. Then, the signal input to terminal 4 through transmission line 3 from the transmission station is analyzed by analyzing part 501 and is distributed to lower receiving station 8, and simultaneously, a negative acknowledge frequency and a retransmission frequency are set to comparing part 503 and check part 504 respectively through line 50, and the negative acknowledge signal from lower receiving station 8 is applied to comparing part 503 through transmission line 10; and if the negative acknowledge signal is a set value or less within a fixed time, it is decided that lower receiving station 8 acknowledges information, thus shortening the transmission time.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7893579A JPS5810899B2 (en) | 1979-06-22 | 1979-06-22 | Unidirectional broadcast communication method |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7893579A JPS5810899B2 (en) | 1979-06-22 | 1979-06-22 | Unidirectional broadcast communication method |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS562765A true JPS562765A (en) | 1981-01-13 |
JPS5810899B2 JPS5810899B2 (en) | 1983-02-28 |
Family
ID=13675721
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP7893579A Expired JPS5810899B2 (en) | 1979-06-22 | 1979-06-22 | Unidirectional broadcast communication method |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5810899B2 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0537764A (en) * | 1991-09-20 | 1993-02-12 | Fujitsu Ltd | Facsimile equipment |
US6321268B1 (en) | 1994-06-08 | 2001-11-20 | Hughes Electronics Corporation | Method and apparatus for selectively retrieving information from a source computer using a terrestrial or satellite interface |
US6473793B1 (en) | 1994-06-08 | 2002-10-29 | Hughes Electronics Corporation | Method and apparatus for selectively allocating and enforcing bandwidth usage requirements on network users |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60132700A (en) * | 1983-12-21 | 1985-07-15 | Sumitomo Jukikai Envirotec Kk | Biological denitrification treatment of sewage in recirculation water channel type aeration tank |
-
1979
- 1979-06-22 JP JP7893579A patent/JPS5810899B2/en not_active Expired
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0537764A (en) * | 1991-09-20 | 1993-02-12 | Fujitsu Ltd | Facsimile equipment |
US6321268B1 (en) | 1994-06-08 | 2001-11-20 | Hughes Electronics Corporation | Method and apparatus for selectively retrieving information from a source computer using a terrestrial or satellite interface |
US6338131B1 (en) | 1994-06-08 | 2002-01-08 | Hughes Electronics Corporation | Network system with TCP/IP ACK reduction |
US6473793B1 (en) | 1994-06-08 | 2002-10-29 | Hughes Electronics Corporation | Method and apparatus for selectively allocating and enforcing bandwidth usage requirements on network users |
US6519651B1 (en) | 1994-06-08 | 2003-02-11 | Hughes Electronics Corporation | Apparatus and method for hybrid network access |
US6571296B1 (en) | 1994-06-08 | 2003-05-27 | Hughes Electronics Corporation | Apparatus and method for hybrid network access |
US6931512B2 (en) | 1994-06-08 | 2005-08-16 | Hughes Electronics Corporation | Method and apparatus for selectively retrieving information from a source computer using a terrestrial or satellite interface |
Also Published As
Publication number | Publication date |
---|---|
JPS5810899B2 (en) | 1983-02-28 |
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