GB2215946A - Process-to-processor communications protocol for a public service trunking system - Google Patents

Process-to-processor communications protocol for a public service trunking system

Info

Publication number
GB2215946A
GB2215946A GB8902033A GB8902033A GB2215946A GB 2215946 A GB2215946 A GB 2215946A GB 8902033 A GB8902033 A GB 8902033A GB 8902033 A GB8902033 A GB 8902033A GB 2215946 A GB2215946 A GB 2215946A
Authority
GB
United Kingdom
Prior art keywords
landline
downlink
site controller
link
landline link
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
Application number
GB8902033A
Other versions
GB8902033D0 (en
GB2215946B (en
Inventor
Dimitri Michael Nazarenko
Iii Houston Howard Hughes
Robert Terrell Gordon
David Leo Hattey
Bruno Yurman
Robert Eldon Cole
Frederick Edward Spangler
Nancy Limpinsel Hall
Jeffrey Scott Childress
Gerald Ewing Roberts
Marc Andrew Dissosway
Gerald Meade Cooper
Samuel Toliver
Robert John Crescenzi
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.)
General Electric Co
Original Assignee
General Electric Co
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
Priority claimed from US07/056,924 external-priority patent/US4821292A/en
Priority claimed from US07/056,922 external-priority patent/US4905302A/en
Priority claimed from US07/056,923 external-priority patent/US4905234A/en
Priority claimed from US07/085,490 external-priority patent/US4903262A/en
Priority claimed from US07/085,491 external-priority patent/US4926496A/en
Priority claimed from US07/085,572 external-priority patent/US4835731A/en
Priority claimed from US07/085,663 external-priority patent/US4903321A/en
Application filed by General Electric Co filed Critical General Electric Co
Publication of GB8902033D0 publication Critical patent/GB8902033D0/en
Publication of GB2215946A publication Critical patent/GB2215946A/en
Priority to GB9110433A priority Critical patent/GB2243273B/en
Publication of GB2215946B publication Critical patent/GB2215946B/en
Application granted granted Critical
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W84/00—Network topologies
    • H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
    • H04W84/04—Large scale networks; Deep hierarchical networks
    • H04W84/08—Trunked mobile radio 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
    • H04L1/0078—Avoidance of errors by organising the transmitted data in a format specifically designed to deal with errors, e.g. location
    • 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
    • H04L1/08—Arrangements for detecting or preventing errors in the information received by repeating transmission, e.g. Verdan system
    • 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
    • H04L1/14—Arrangements for detecting or preventing errors in the information received by using return channel in which the signals are sent back to the transmitter to be checked ; echo 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
    • 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
    • H04L1/1607—Details of the supervisory signal
    • 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
    • H04L1/1607—Details of the supervisory signal
    • H04L1/1671—Details of the supervisory signal the supervisory signal being transmitted together with control information
    • 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
    • H04L1/1607—Details of the supervisory signal
    • H04L1/1685—Details of the supervisory signal the supervisory signal being transmitted in response to a specific request, e.g. to a polling signal
    • 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
    • H04L1/1867—Arrangements specially adapted for the transmitter end
    • H04L1/1874—Buffer management
    • H04L1/1877—Buffer management for semi-reliable protocols, e.g. for less sensitive applications like streaming video
    • 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
    • H04L1/1867—Arrangements specially adapted for the transmitter end
    • H04L1/188—Time-out mechanisms
    • 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
    • H04L1/1867—Arrangements specially adapted for the transmitter end
    • H04L1/1887—Scheduling and prioritising arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/06—Dc level restoring means; Bias distortion correction ; Decision circuits providing symbol by symbol detection
    • H04L25/061—Dc level restoring means; Bias distortion correction ; Decision circuits providing symbol by symbol detection providing hard decisions only; arrangements for tracking or suppressing unwanted low frequency components, e.g. removal of dc offset
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/06—Dc level restoring means; Bias distortion correction ; Decision circuits providing symbol by symbol detection
    • H04L25/061—Dc level restoring means; Bias distortion correction ; Decision circuits providing symbol by symbol detection providing hard decisions only; arrangements for tracking or suppressing unwanted low frequency components, e.g. removal of dc offset
    • H04L25/063—Setting decision thresholds using feedback techniques only
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/06—Dc level restoring means; Bias distortion correction ; Decision circuits providing symbol by symbol detection
    • H04L25/061—Dc level restoring means; Bias distortion correction ; Decision circuits providing symbol by symbol detection providing hard decisions only; arrangements for tracking or suppressing unwanted low frequency components, e.g. removal of dc offset
    • H04L25/065—Binary decisions
    • 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
    • H04L1/1809—Selective-repeat protocols
    • 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
    • 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
    • H04L2001/125—Arrangements for preventing errors in the return channel
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L7/00—Arrangements for synchronising receiver with transmitter
    • H04L7/04—Speed or phase control by synchronisation signals
    • H04L7/041—Speed or phase control by synchronisation signals using special codes as synchronising signal
    • H04L7/046—Speed or phase control by synchronisation signals using special codes as synchronising signal using a dotting sequence

Abstract

A downlink (103) between a communications dispatch console (102) and digitally trunked radio repeater system site controller (410) efficiently transfers message data between the site controller (410) and the console (102) over a standard 9.2 kilobit per second landline (452). A downlink trunking card (450) identical in structure to trunking cards (400-402-408) used in the preferred embodiment system for RF channel signal processing interfaces the site controller (410) with the landline link (450-454-457). A similar trunking card (454) on the other side of the landline link (452) interfaces the dispatch console (102) with the landline link (452). Message protocol and format is translated between the site controller (410) and the landline link (452) and between the landline link (452) and the dispatch console (102). Data buffering at each end of the landline link (452) maximizes data transfer rate over the landline (452), and in addition, a priority scheme insures that more important messages are transmitted over the downlink (103) before less important messages. Retransmit-until-acknowledged protocol is used to insure reliable message transfer - and also to permit receiving units (300, 302, 304, 306) from the downlink (103) to slow down transmitting units (300, 302, 304, 306) in order to avoid message traffic blockage.
GB8902033A 1987-06-03 1989-01-31 Process-to-processor communications protocol for a public service trunking system Expired - Lifetime GB2215946B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB9110433A GB2243273B (en) 1987-06-03 1991-05-14 Processor-to-processor communications protocol for a public service trunking system

Applications Claiming Priority (9)

Application Number Priority Date Filing Date Title
US5704687A 1987-06-03 1987-06-03
US07/056,924 US4821292A (en) 1987-06-03 1987-06-03 Adaptive limiter/detector which changes time constant upon detection of dotting pattern
US07/056,923 US4905234A (en) 1987-06-03 1987-06-03 Apparatus and method for transmitting digital data over a radio communications channel
US07/056,922 US4905302A (en) 1987-06-03 1987-06-03 Trunked radio repeater system
US07/085,490 US4903262A (en) 1987-08-14 1987-08-14 Hardware interface and protocol for a mobile radio transceiver
US07/085,491 US4926496A (en) 1987-08-14 1987-08-14 Method and apparatus for infrequent radio users to simply obtain emergency assistance
US07/085,572 US4835731A (en) 1987-08-14 1987-08-14 Processor-to-processor communications protocol for a public service trunking system
US07/085,663 US4903321A (en) 1987-08-14 1987-08-14 Radio trunking fault detection system
PCT/US1988/001983 WO1988009969A1 (en) 1987-06-03 1988-06-03 Process-to-processor communications protocol for a public service trunking system

Publications (3)

Publication Number Publication Date
GB8902033D0 GB8902033D0 (en) 1989-05-10
GB2215946A true GB2215946A (en) 1989-09-27
GB2215946B GB2215946B (en) 1992-01-22

Family

ID=27574394

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8902033A Expired - Lifetime GB2215946B (en) 1987-06-03 1989-01-31 Process-to-processor communications protocol for a public service trunking system

Country Status (4)

Country Link
JP (1) JP2790147B2 (en)
DK (1) DK50789A (en)
GB (1) GB2215946B (en)
WO (1) WO1988009969A1 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5164960A (en) * 1990-02-15 1992-11-17 Advanced Micro Devices Inc. Medium attachment unit for use with twisted pair local area network
US7146433B2 (en) 2002-02-01 2006-12-05 Lenovo Singapore Pte. Ltd Extending an allowable transmission distance between a wireless device and an access point by communication with intermediate wireless devices
CN102945544B (en) * 2012-11-28 2015-04-22 国家测绘地理信息局卫星测绘应用中心 Simulation method of low orbit satellite images
CN105703875B (en) * 2014-11-25 2020-08-07 南京中兴新软件有限责任公司 Method, equipment and system for transmitting message

Citations (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3517312A (en) * 1966-02-23 1970-06-23 Nippon Electric Co Telephone and telegraph switching system utilizing a stationary satellite
US3548108A (en) * 1965-02-27 1970-12-15 Nippon Electric Co Telegraph and telephone switching system utilizing a stationary satellite
US3944723A (en) * 1974-12-05 1976-03-16 General Electric Company Station for power line access data system
US4100533A (en) * 1976-12-06 1978-07-11 Bell Telephone Laboratories, Incorporated Multipoint polling technique
US4399555A (en) * 1980-04-28 1983-08-16 Bell Telephone Laboratories, Incorporated Cellular high capacity mobile radiotelephone system with fleet-calling arrangement for dispatch service
US4422171A (en) * 1980-12-29 1983-12-20 Allied Corporation, Law Department Method and system for data communication
US4449246A (en) * 1980-05-02 1984-05-15 Harris Corporation Orderwire communication system
US4511958A (en) * 1978-01-30 1985-04-16 Patelhold Patentverwertungs- & Elektro-Holding Ag Common bus access system using plural configuration tables for failure tolerant token passing among processors
US4549297A (en) * 1982-03-08 1985-10-22 Fuji Xerox Co., Ltd. Data retransmitting system
US4562572A (en) * 1983-01-11 1985-12-31 International Telephone And Telegraph Corporation Cellular mobile radio service telephone system
US4601035A (en) * 1983-10-03 1986-07-15 At&T Bell Laboratories Data communication method and circuitry
US4612415A (en) * 1984-08-03 1986-09-16 Motorola, Inc. Dynamic control of telephone traffic in a trunked radio system
US4654867A (en) * 1984-07-13 1987-03-31 Motorola, Inc. Cellular voice and data radiotelephone system
US4672658A (en) * 1985-10-16 1987-06-09 At&T Company And At&T Bell Laboratories Spread spectrum wireless PBX
US4672601A (en) * 1984-12-06 1987-06-09 Motorola, Inc. Duplex interconnect/dispatch trunked radio system
US4672655A (en) * 1983-12-08 1987-06-09 Ant Nachrichtentechnik Gmbh Method for establishing a connection with a mobile subscriber and system for implementing the method
US4677656A (en) * 1984-06-19 1987-06-30 Motorola, Inc. Telephone-radio interconnect system
US4694473A (en) * 1985-03-08 1987-09-15 Oki Electric Industry Co., Ltd. Data communication system with block synchronization data in mobile radio
US4698805A (en) * 1985-09-13 1987-10-06 Motorola, Inc. Console interface for a trunked radio system
US4712229A (en) * 1986-03-26 1987-12-08 Nec Corporation Multiple access radio telephone system selectively operating on full-duplex and half-duplex modes
US4712214A (en) * 1986-01-10 1987-12-08 International Business Machines Corporation Protocol for handling transmission errors over asynchronous communication lines
US4730348A (en) * 1986-09-19 1988-03-08 Adaptive Computer Technologies Adaptive data compression system

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WO1987003444A1 (en) * 1985-11-27 1987-06-04 Hughes Aircraft Company Digital data interface unit

Patent Citations (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3548108A (en) * 1965-02-27 1970-12-15 Nippon Electric Co Telegraph and telephone switching system utilizing a stationary satellite
US3517312A (en) * 1966-02-23 1970-06-23 Nippon Electric Co Telephone and telegraph switching system utilizing a stationary satellite
US3944723A (en) * 1974-12-05 1976-03-16 General Electric Company Station for power line access data system
US4100533A (en) * 1976-12-06 1978-07-11 Bell Telephone Laboratories, Incorporated Multipoint polling technique
US4511958A (en) * 1978-01-30 1985-04-16 Patelhold Patentverwertungs- & Elektro-Holding Ag Common bus access system using plural configuration tables for failure tolerant token passing among processors
US4399555A (en) * 1980-04-28 1983-08-16 Bell Telephone Laboratories, Incorporated Cellular high capacity mobile radiotelephone system with fleet-calling arrangement for dispatch service
US4449246A (en) * 1980-05-02 1984-05-15 Harris Corporation Orderwire communication system
US4422171A (en) * 1980-12-29 1983-12-20 Allied Corporation, Law Department Method and system for data communication
US4549297A (en) * 1982-03-08 1985-10-22 Fuji Xerox Co., Ltd. Data retransmitting system
US4562572A (en) * 1983-01-11 1985-12-31 International Telephone And Telegraph Corporation Cellular mobile radio service telephone system
US4601035A (en) * 1983-10-03 1986-07-15 At&T Bell Laboratories Data communication method and circuitry
US4672655A (en) * 1983-12-08 1987-06-09 Ant Nachrichtentechnik Gmbh Method for establishing a connection with a mobile subscriber and system for implementing the method
US4677656A (en) * 1984-06-19 1987-06-30 Motorola, Inc. Telephone-radio interconnect system
US4654867A (en) * 1984-07-13 1987-03-31 Motorola, Inc. Cellular voice and data radiotelephone system
US4612415A (en) * 1984-08-03 1986-09-16 Motorola, Inc. Dynamic control of telephone traffic in a trunked radio system
US4672601A (en) * 1984-12-06 1987-06-09 Motorola, Inc. Duplex interconnect/dispatch trunked radio system
US4694473A (en) * 1985-03-08 1987-09-15 Oki Electric Industry Co., Ltd. Data communication system with block synchronization data in mobile radio
US4698805A (en) * 1985-09-13 1987-10-06 Motorola, Inc. Console interface for a trunked radio system
US4672658A (en) * 1985-10-16 1987-06-09 At&T Company And At&T Bell Laboratories Spread spectrum wireless PBX
US4712214A (en) * 1986-01-10 1987-12-08 International Business Machines Corporation Protocol for handling transmission errors over asynchronous communication lines
US4712229A (en) * 1986-03-26 1987-12-08 Nec Corporation Multiple access radio telephone system selectively operating on full-duplex and half-duplex modes
US4730348A (en) * 1986-09-19 1988-03-08 Adaptive Computer Technologies Adaptive data compression system

Also Published As

Publication number Publication date
JPH02500713A (en) 1990-03-08
GB8902033D0 (en) 1989-05-10
WO1988009969A1 (en) 1988-12-15
JP2790147B2 (en) 1998-08-27
GB2215946B (en) 1992-01-22
DK50789D0 (en) 1989-02-03
DK50789A (en) 1989-04-03

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Legal Events

Date Code Title Description
732 Registration of transactions, instruments or events in the register (sect. 32/1977)
PCNP Patent ceased through non-payment of renewal fee

Effective date: 20010603