DE3334886A1 - Mobile radio system with a group of speech channels, a control channel and central channel allocation - Google Patents

Mobile radio system with a group of speech channels, a control channel and central channel allocation

Info

Publication number
DE3334886A1
DE3334886A1 DE19833334886 DE3334886A DE3334886A1 DE 3334886 A1 DE3334886 A1 DE 3334886A1 DE 19833334886 DE19833334886 DE 19833334886 DE 3334886 A DE3334886 A DE 3334886A DE 3334886 A1 DE3334886 A1 DE 3334886A1
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DE
Germany
Prior art keywords
channel
speech
organization
radio system
mobile radio
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
DE19833334886
Other languages
German (de)
Other versions
DE3334886C2 (en
Inventor
Bernhard Prof. Dr.-Ing. 7906 Blaustein Walke
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.)
Airbus Defence and Space GmbH
Original Assignee
Licentia Patent Verwaltungs GmbH
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 Licentia Patent Verwaltungs GmbH filed Critical Licentia Patent Verwaltungs GmbH
Priority to DE19833334886 priority Critical patent/DE3334886A1/en
Publication of DE3334886A1 publication Critical patent/DE3334886A1/en
Application granted granted Critical
Publication of DE3334886C2 publication Critical patent/DE3334886C2/de
Granted legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access, e.g. scheduled or random access
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access, e.g. scheduled or random access
    • H04W74/08—Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access, e.g. scheduled or random access
    • H04W74/08—Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access]
    • H04W74/0808—Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access] using carrier sensing, e.g. as in CSMA

Abstract

When all the speech channels are occupied, the control channel is also allocated as a speech channel. Other authorised subscribers may also make calls to the central station during speech pauses. The central station then interrupts a non-prioritised call in progress and reallocates the freed channel. In a different embodiment of the invention, all subscribers may transmit their calls when the control channel is occupied on a free speech channel which is located by searching the group.

Description

Mobilfunksystem mit einem Bündel von Sprechkanälen, einemMobile radio system with a bundle of speech channels, a

Organisationskanal und zentraler Kanalzuteilung Die Erfindung betrifft ein Mobilfunksystem nach dem Oberbegriff des Anspruchs 1. Ein solches Mobilfunksystem ist z. B. aus der DE-OS 24 23 603 bekannt. Ein Bündel von Sprechkanälen steht für Sprechverbindungen zwischen mobilen Stationen untereinander und einer Zentrale zur Verfügung. Die Zentrale teilt auf Anforderung die Kanäle zu. Die Abwicklung des Organisationsverkehrs (Rufe, Zuteilung) erfolgt auf einem oder mehreren Organisationskanälen. Wenn sämtliche Sprechkanäle des Bündels belegt sind, kann die Zentrale auch den Organisationskanal als Sprechkanal zuteilen.Control Channel and Central Channel Allocation The invention relates to a mobile radio system according to the preamble of claim 1. Such a mobile radio system is z. B. from DE-OS 24 23 603 known. A bundle of speech channels is available for Voice connections between mobile stations and a control center for Disposal. The control center allocates the channels on request. The handling of the Organization traffic (calls, allocation) takes place on one or more organization channels. If all speech channels of the bundle are busy, the control center can also use the Allocate the organization channel as a speaking channel.

Bei derart belegtem Organisationskanal ist es aber nicht mehr möglich, besonders dringliche Rufe, sogenannte Prioritätsrufe, zu erkennen und zu bedienen. Außerdem ist es nicht möglich, einen im Bündel frei werdenden Sprechkanal sofort wieder zu vergeben, solange der Organisationskanal belegt ist.If the organization channel is occupied in this way, it is no longer possible to to recognize and handle particularly urgent calls, so-called priority calls. Besides, it is not possible, a speech channel that becomes free in the bundle to be reassigned immediately as long as the organization channel is occupied.

Aufgabe der Erfindung ist es, ein Mobilfunksystem der eingangs genannten Art anzugeben, welches die zur Verfügung stehenden Kanäle besser ausnutzt und insbesondere das Erkennen und Bedienen von Prioritätsrufen bei belegtem Organisationskanal ermöglicht.The object of the invention is to provide a mobile radio system of the type mentioned at the beginning Specify the type which makes better use of the available channels and in particular enables the recognition and operation of priority calls when the organization channel is busy.

Lösungen dieser Aufgabe sind in den Patentansprüchen 1, 3 und 7 angegeben. Die weiteren Ansprüche beinhalten vorteilhafte Ausbildungen bzw. Weiterbildungen der Erfindung.Solutions to this problem are given in claims 1, 3 and 7. The further claims contain advantageous designs or further developments the invention.

In einer ersten Variante der Erfindung überprüfen mobile Sta-tionen mit Sprechwunsch bei als Sprechkanal belegtem Organisationskanal diesen auf Sprechpausen hin und setzen in solchen Sprechpausen ihren Ruf ab. Das laufende Gespräch wird dadurch nicht gestört und eine sichere Auswertung des Rufes in der Zentrale gewährleistet. Vorteilhafterweise überprüfen die mobilen Stationen den Rückkanal des Organisationskanals auf Sprache hin und schließen daraus auf Sprechpausen auf dem Hinkanal (in Richtung Zentrale).In a first variant of the invention, mobile stations check with request to speak if the organization channel is occupied as a speaking channel, this on pauses in speaking and put down their call in such pauses in speaking. The ongoing conversation will this is not disturbed and a reliable evaluation of the call in the control center is guaranteed. The mobile stations advantageously check the return channel of the organization channel towards speech and conclude from this that there are pauses in speech on the upward channel (in the direction of Headquarters).

Die Zentrale kann der rufenden mobilen Station in einer Sprechpause ein Quittungszeichen auf dem Rückkanal des Organisationskanals übermitteln und ggf. ein Wartezeichen, falls kein Sprechkanal zur Verfügung gestellt werden kann.The control center can speak to the calling mobile station during a pause in speech transmit an acknowledgment character on the return channel of the organization channel and, if necessary, a waiting signal if no speech channel can be made available.

Die ruhende Station wird in der Zentrale beispielsweise in eine Warteschlange eingeordnet. Bei Mobilfunksystemen ohne derartige Warteschlangen wird es dagegen in der Regel sinnvoll sein, bei belegtem Organisationskanal nur Prioritätsrufe zuzulassen.The stationary station is, for example, placed in a queue in the control center classified. In the case of mobile radio systems without such queues, however, it is It usually makes sense to only allow priority calls when the organization channel is busy.

In Weiterbildung der Erfindung unterbricht die Zentrale bei einem Prioritätsruf von einer mobilen Station ein bestehendes prioritätsloses Gespräch - falls ein solches auf irgendeinem der Kanäle des Bündels oder dem Organisationskanal läuft - und teilt den frei werdenden Kanal der rufenden Station zu. Der Prioritätsruf wird somit sofort und bevorzugt behandelt.In a further development of the invention, the control center interrupts a Priority call from a mobile station an existing call without priority - if such on any of the channels of the bundle or the control channel runs - and assigns the channel that becomes free to the calling station. The priority call is therefore treated immediately and preferentially.

In einer zweiten Variante der Erfindung dürfen berechtigte mobile Stationen bei als Sprechkanal belegtem Organisationskanal ihren (Prioritäts-) Ruf spontan absetzen.In a second variant of the invention, authorized mobile Stations when the organization channel is occupied as a speech channel their (priority) call stop spontaneously.

Dabei wird in Kauf genommen, daß ein auf dem Organisationskanal laufendes Gespräch gestört wird. Der Ruf wird vorzugsweise mehrmals wiederholt, um die Auswertewahrscheinlichkeit in der Zentrale su erhöhen. Sprachabschnitte, sogenannte "Talkspurts", sind typischerweise bis zu 2 Sekunden lang. In Mobilfunksystemen, wo diese Dauer als zu lang angesehen wird, um Prioritätsrufe schnell genug bedienen zu können, ist die zweite Variante der Erfindung sinnvoll einsetzbar. Unterbrechung von prioritätslosen Gesprächen, Quittierung, Warteschlangenbildung usw. können im übrigen wie bei der ersten Variante ausgebildet werden.It is accepted that a running on the organization channel Conversation is disturbed. The call is preferably repeated several times in order to improve the evaluation probability increase in the head office su. Speech segments, so-called "talkspurts", are typical for up to 2 seconds. In cellular systems where this duration is considered too long in order to be able to serve priority calls quickly enough is the second variant the invention can be used meaningfully. Interruption of priorityless calls, Acknowledgment, queuing, etc. can otherwise be done as with the first variant be formed.

In einer dritten Variante der Erfindung suchen mobile Stationen mit Sprechwunsch bei als Sprechkanal belegtem Organisationskanal das Bündel der Sprechkanäle nach einem freigewordenen/freiwerdenden Kanal ab und setzen dann auf diesem ihren Ruf ab. Freiwerdende Kanäle können also trotz belegtem Organisationskanal sofort wieder vergeben werden.In a third variant of the invention, mobile stations also search Speech request if the organization channel is occupied as a speech channel, the bundle of speech channels for a channel that has become free and then put your Call. Channels that become free can be used immediately despite the organization channel being occupied to be forgiven again.

Vorteilhaft bei dieser Variante ist, daß auch bei gestörtem Organisationskanal das Funksystem nicht zusammenbricht, sondern in ein reines (Kanal-) Absuchsystem übergeht.The advantage of this variant is that even with a disturbed organization channel the radio system does not collapse, but into a pure (canal) search system transforms.

Bei belegtem Organisationskanal entsteht unter Umständen ein Rückstau von Rufen, den man sich als dezentral organisierte Warteschlange vorstellen kann. Damit nicht mehrere mcbile Stationen - insbesondere bei frei werdendem Organisationskanal - quasi gleichzeitig einen Ruf absetzen und kollidieren, setzen sie vorteilhafterweise ihre Rufe nach einer zufalisgesteuerten Verzögerungszeit ab. Besonders vorteilhaft ist dafür das bekannte p-persistente CSMA-Protokoll gemäß dem die Stationen mit einer Wahrscheinlichkeit p 'ihren-Ruf sofort absetzen, bzw. mit der Wahrscheinlichkeit 1-p eine zufällige aber begrenzt lange Zeitspanne warten, nach deren Ablauf sie bei. noch als frei festgestelltem Kanal ihren Ruf wieder mit der Wahrscheinlichkeit p absetzen usw.. Der Parameter p kann dabei für prioritätslose und bevorrechtigte Stationen unterschiedlich gewählt werden.If the organization channel is busy, there may be a backlog of calls, which can be imagined as a decentrally organized queue. So not several mcbile stations - especially when the organization channel becomes free - Put a call at the same time and collide, set them advantageously their calls after a randomly controlled delay time. Particularly beneficial is the well-known p-persistent CSMA protocol according to which the stations use a probability p 'immediately drop their call, or with the probability 1-p wait a random but limited period of time, after which it expires at. channel that has still been determined to be free has its reputation again with the probability Set p, etc. The parameter p can be used for priority and priority Stations are chosen differently.

Claims (1)

Patentansprüche 1. Mobilfunksystem mit einem Bündel von Sprechkanälen, mindestens einem Organisationskanal und zentraler Kanalzuteilung durch eine Zentrale, wobei bei belegtem Bündel auch der Organisationskanal als Sprechkanal zugeteilt werden kann, dadurch gekennzeichnet, daß mobile Stationen mit Sprechwunsch bei als Sprechkanal belegtem Organisationskanal diesen auf Sprechpausen hin überprüfen und in solchen Sprechpausen ihren Ruf absetzen.Claims 1. Mobile radio system with a bundle of speech channels, at least one organization channel and central channel allocation by a control center, whereby the organization channel is also assigned as a speech channel when the bundle is occupied can be, characterized in that mobile stations with a request to speak at as The organization channel occupied by the speech channel, check it for pauses in speech and cancel their call during such pauses in speaking. 2s. Mobilfunksystem nach Anspruch 1, dadurch gekennzeichnet, daß die mobilen Stationen den Rückkanal des Organisationskanals auf Sprache hin überwachen und daraus auf Sprechpausen auf dem Hinkanal schließen.2s. Mobile radio system according to Claim 1, characterized in that the mobile stations monitor the return channel of the organization channel for voice and deduce from this that there are pauses in speech on the Hinkanal. 3. Mobilfunksystem mit einem Bündel von Sprechkanälen, mindestens einem Organisationskanal und zentraler Kanalzuteilung durch eine Zentrale, wobei bei belegtem Bündel auch der Organisationskanal als Sprechkanal zugeteilt werden kann, dadurch gekennzeichnet, daß berechtigte mobile Stationen mit Sprechwunsch bei als Sprechkanal belegtem Organisationskanal spontan einen Prioritätsruf aussenden.3. Cellular system with a bundle of speech channels, at least an organization channel and central channel allocation by a control center, whereby when the bundle is occupied also the organization channel as a speaking channel can be allocated, characterized in that authorized mobile stations with a request to speak with the organization channel occupied as a voice channel, a priority call spontaneously send out. 4. Mobilfunksystem nach Anspruch 3, dadurch gekennzeichnet, daß die berechtigte mobile Station den Prioritätsruf mehrmals wiederholt.4. Mobile radio system according to claim 3, characterized in that the authorized mobile station repeats the priority call several times. 5. Mobilfunksystem nach Anspruch 1 oder 3, dadurch gekennzeichnet, daß die Zentrale bei einem Prioritätsruf von einer mobilen Station ein bestehendes prioritätsloses Gespräch unterbricht und den freiwerdenden Kanal der rufenden Station zuteilt.5. Mobile radio system according to claim 1 or 3, characterized in that that the control center has an existing one in the event of a priority call from a mobile station Priorityless call interrupts and the channel of the calling station that becomes free allocates. 6. Mobilfunksystem nach Anspruch 1 oder 3, dadurch gekennzeichnet, daß die Zentrale der rufenden Station in einer Sprechpause auf dem Rückkanal des Organisationskanals ein Quittungszeichen übermittelt und ggf. ein Wartezeichen, falls kein Sprechkanal zur Verfügung gestellt werden kann.6. Mobile radio system according to claim 1 or 3, characterized in that that the control center of the calling station is in a pause on the return channel of the An acknowledgment character is transmitted to the organization channel and, if necessary, a waiting character, if no speaking channel can be made available. 7. Mobilfunksystem mit einem Bündel von Sprechkanälen, mindestens einem Organisationskanal und zentraler Kanalzuteilung durch eine Zentrale, wobei bei belegtem Bügel auch der Organisationskanal als Sprechkanal zugeteilt werden kann, dadurch gekennzeichnet, daß mobile Stationen mit Sprechwunsch bei als Sprechkanal belegtem Organisationskanal das Bündel nach einem frei gewordenen Sprechkanal absuchen und auf diesem ihren Ruf absetzen.7. Cellular system with a bundle of speech channels, at least an organization channel and central channel allocation by a control center, whereby If the bar is occupied, the organization channel can also be assigned as a speech channel can, characterized in that mobile stations with a speech request as a speech channel If the organization channel is occupied, search the bundle for a voice channel that has become free and set their reputation on this. 8. Mobilfunksystem nach cinem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß insbesondere prioritätslosc mobile Stationen ihre Rufe bei Freiwerden des Organisationskanals oder eines anderen Kanals nach einer zufallsgesteuerten Verzögerungszeit absetzen.8. Mobile radio system according to cinem of the preceding claims, characterized characterized that in particular priority-less mobile stations their calls when they become free of the organization channel or another channel according to a randomized Set delay time. 9. Mobilfunksystem nach Anspruch 8, dadurch gekennzeichnet, daß die mobilen Stationen ihre Rufe entsprechend de@ p-persistenten CSMA-Protokoll absetzen.9. Mobile radio system according to claim 8, characterized in that the mobile stations send their calls according to the de @ p-persistent CSMA protocol.
DE19833334886 1983-09-27 1983-09-27 Mobile radio system with a group of speech channels, a control channel and central channel allocation Granted DE3334886A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19833334886 DE3334886A1 (en) 1983-09-27 1983-09-27 Mobile radio system with a group of speech channels, a control channel and central channel allocation

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19833334886 DE3334886A1 (en) 1983-09-27 1983-09-27 Mobile radio system with a group of speech channels, a control channel and central channel allocation

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DE3334886A1 true DE3334886A1 (en) 1985-04-18
DE3334886C2 DE3334886C2 (en) 1992-08-13

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Cited By (7)

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DE3611301A1 (en) * 1986-04-04 1987-12-10 Philips Patentverwaltung METHOD AND CONTROL DEVICE FOR SELECTING AN ORGANIZATION CHANNEL BY A MOVING RADIO STATION
EP0304955A2 (en) * 1987-08-27 1989-03-01 Nec Corporation Radio concentrator system capable of completing calls under congested traffic
WO1995019687A1 (en) * 1994-01-14 1995-07-20 Nokia Telecommunications Oy Method for allocating channels in a radio system
WO1995022870A2 (en) * 1994-02-08 1995-08-24 Nokia Telecommunications Oy Establishment of a prioritized telecommunication connection
AU674781B2 (en) * 1993-08-12 1997-01-09 Nokia Telecommunications Oy Method, mobile exchange, and subscriber station in a mobile radio system for establishing a high-priority call
EP0801871A1 (en) * 1995-11-01 1997-10-22 Motorola, Inc. Method and apparatus for allocating a communication channel in a communication system
EP0717579A3 (en) * 1994-11-30 1999-09-29 AT&T Corp. Service prioritization in a cellular telephone system

Families Citing this family (1)

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DE4417045B4 (en) * 1994-05-14 2004-02-26 T-Mobile Deutschland Gmbh Procedure for determining the location of vehicles

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DE2460183B2 (en) * 1973-12-21 1976-08-26 Telefonaktiebolaget Lm Ericsson, Stockholm METHOD FOR MONITORING SEVERAL RADIO CHANNELS IN A RADIO MESSAGE SYSTEM
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AT205083B (en) * 1956-03-07 1959-09-10 Int Standard Electric Corp Procedure for ensuring that certain messages are given priority in communication systems
DE2215125B2 (en) * 1971-03-29 1979-06-21 Televerkets Centralfoervaltning, Farsta (Schweden) Radio device with a fixed station and mobile stations
DE2141333A1 (en) * 1971-08-18 1973-02-22 Licentia Gmbh MESSAGE TRANSMISSION SYSTEM
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DE2460183B2 (en) * 1973-12-21 1976-08-26 Telefonaktiebolaget Lm Ericsson, Stockholm METHOD FOR MONITORING SEVERAL RADIO CHANNELS IN A RADIO MESSAGE SYSTEM
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Cited By (13)

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Publication number Priority date Publication date Assignee Title
DE3611301A1 (en) * 1986-04-04 1987-12-10 Philips Patentverwaltung METHOD AND CONTROL DEVICE FOR SELECTING AN ORGANIZATION CHANNEL BY A MOVING RADIO STATION
EP0304955A2 (en) * 1987-08-27 1989-03-01 Nec Corporation Radio concentrator system capable of completing calls under congested traffic
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WO1995022870A2 (en) * 1994-02-08 1995-08-24 Nokia Telecommunications Oy Establishment of a prioritized telecommunication connection
EP0717579A3 (en) * 1994-11-30 1999-09-29 AT&T Corp. Service prioritization in a cellular telephone system
EP0801871A1 (en) * 1995-11-01 1997-10-22 Motorola, Inc. Method and apparatus for allocating a communication channel in a communication system
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