GB2215946A - Process-to-processor communications protocol for a public service trunking system - Google Patents
Process-to-processor communications protocol for a public service trunking systemInfo
- 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
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
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Power Engineering (AREA)
- Multimedia (AREA)
- Mobile Radio Communication Systems (AREA)
- Radio Relay Systems (AREA)
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.
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 | |
US07/056,923 US4905234A (en) | 1987-06-03 | 1987-06-03 | Apparatus and method for transmitting digital data over a radio communications channel |
US07/056,924 US4821292A (en) | 1987-06-03 | 1987-06-03 | Adaptive limiter/detector which changes time constant upon detection of dotting pattern |
US07/056,922 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 |
US07/085,572 US4835731A (en) | 1987-08-14 | 1987-08-14 | Processor-to-processor communications protocol for a public service trunking system |
US07/085,491 US4926496A (en) | 1987-08-14 | 1987-08-14 | Method and apparatus for infrequent radio users to simply obtain emergency assistance |
US07/085,663 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)
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)
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 |
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 |
US4672658A (en) * | 1985-10-16 | 1987-06-09 | At&T Company And At&T Bell Laboratories | Spread spectrum wireless PBX |
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 |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1987003444A1 (en) * | 1985-11-27 | 1987-06-04 | Hughes Aircraft Company | Digital data interface unit |
-
1988
- 1988-06-03 JP JP63505629A patent/JP2790147B2/en not_active Expired - Lifetime
- 1988-06-03 WO PCT/US1988/001983 patent/WO1988009969A1/en unknown
-
1989
- 1989-01-31 GB GB8902033A patent/GB2215946B/en not_active Expired - Lifetime
- 1989-02-03 DK DK050789A patent/DK50789A/en not_active Application Discontinuation
Patent Citations (22)
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 |
---|---|
GB8902033D0 (en) | 1989-05-10 |
GB2215946B (en) | 1992-01-22 |
WO1988009969A1 (en) | 1988-12-15 |
DK50789A (en) | 1989-04-03 |
JP2790147B2 (en) | 1998-08-27 |
DK50789D0 (en) | 1989-02-03 |
JPH02500713A (en) | 1990-03-08 |
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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 |