DE102008003710A1 - Radio system i.e. host system, for use with public network, has mobile subscriber-terminal connected by point-to-point connections, where central devices e.g. mobile devices, are not needed and other systems are exclusively allocated - Google Patents

Radio system i.e. host system, for use with public network, has mobile subscriber-terminal connected by point-to-point connections, where central devices e.g. mobile devices, are not needed and other systems are exclusively allocated Download PDF

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Publication number
DE102008003710A1
DE102008003710A1 DE200810003710 DE102008003710A DE102008003710A1 DE 102008003710 A1 DE102008003710 A1 DE 102008003710A1 DE 200810003710 DE200810003710 DE 200810003710 DE 102008003710 A DE102008003710 A DE 102008003710A DE 102008003710 A1 DE102008003710 A1 DE 102008003710A1
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Germany
Prior art keywords
point
devices
needed
systems
radio system
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DE200810003710
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German (de)
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Eberhard Herter
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Individual
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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0003—Two-dimensional division
    • H04L5/0005—Time-frequency
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S5/00—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations
    • G01S5/02—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations using radio waves
    • G01S5/0284—Relative positioning
    • G01S5/0289—Relative positioning of multiple transceivers, e.g. in ad hoc networks
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
    • H04W16/14—Spectrum sharing arrangements between different networks
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W84/00—Network topologies
    • H04W84/18—Self-organising networks, e.g. ad-hoc networks or sensor networks

Abstract

The system has a mobile subscriber-terminal connected by point-to-point connections of smaller bit rate, where central devices e.g. mobile devices or fixed stations, are not needed, the system is operated in frequency ranges and other systems are exclusively allocated. Spreading processes are used, where information about the connections are used for position finding. A radio technology is used for a gateway to/from a public network, and an exclusive line is allocated for universal mobile telecommunication system (UMTS).

Description

Die Erfindung betrifft ein neuartiges Funksystem für mobile Teilnehmer. Bekannte Systeme benötigen eine exklusive Frequenzzuteilung und zentrale Einrichtungen (z. B. speziell ausgerüstete Mobilgeräte oder Feststationen)The The invention relates to a novel radio system for mobile subscribers. Known Need systems an exclusive frequency allocation and central facilities (eg. B. specially equipped mobile devices or base stations)

Es ist Aufgabe der Erfindung, ein Funksystem zu schaffen, das nur aus gleichartigen Teilnehmer-Endeinrichtungen besteht und ohne Vorarbeiten sofort irgendwo auf der Welt eingesetzt werden kann. Die Aufgabe wird durch die in Anspruch 1 aufgeführten Merkmale gelöst. Vorteilhafte Weiterbildungen sind den Unteransprüchen zu entnehmen.It The object of the invention is to provide a radio system that only out similar subscriber terminal equipment exists and without preliminary work immediately can be used anywhere in the world. The task is through those listed in claim 1 Characteristics solved. Advantageous developments can be found in the dependent claims.

Die Erfindung wird anhand der folgenden Zeichnungen näher beschrieben. Es zeigen:The The invention will be described in more detail with reference to the following drawings. Show it:

1 Nutzbare Frequenzbänder 1 Usable frequency bands

2 Erkennung freier Frequenzbänder 2 Detection of free frequency bands

3 Burstaufbau 3 burst building

4 Funksystem mit 4 Teilnehmern 4 Radio system with 4 participants

5 Gateway 5 gateway

Die Erfindung basiert auf zwei Grundideen: Arbeit in Frequenzbereichen, die anderen Funksystemen („Gastgeber") exklusiv zugeteilt sind, und Standverbindungen zwischen den Teilnehmer-Endeinrichtungen TE (terminal equipment) des Systems nach der Erfindung, das im Folgenden als „Gastsystem" bezeichnet wird. Der technisch nutzbare Frequenzbereich ist praktisch lückenlos an standardisierte Systeme vergeben. Trotzdem stellt man an einem bestimmten Ort fest, dass an manchen Stellen des Spektrums nur eine so kleine Leistung empfangen wird, dass Empfänger des Gastgebers nicht funktionieren können. Gründe dafür gibt es viele, u. a.:

  • – Das Exklusivband (z. B. für UMTS) ist noch nicht in allen Teilen vergeben.
  • – Der/die Sender des Gastgebers sind zu weit entfernt.
  • – Die Signale des Gastgebers werden (z. B. durch Mauern, oder in einer Schlucht) zu stark gedämpft.
The invention is based on two basic ideas: work in frequency ranges exclusively allocated to other radio systems ("hosts") and fixed connections between the subscriber equipment TE (terminal equipment) of the system according to the invention, which will be referred to as "guest system" hereinafter , The technically usable frequency range is assigned almost completely to standardized systems. However, at a certain point, you notice that in some parts of the spectrum, only a small amount of power is being received so that the host's receiver can not work. There are many reasons for this, including:
  • - The exclusive band (eg for UMTS) is not yet awarded in all parts.
  • - The host (s) are too far away.
  • - The signals of the host are too much attenuated (eg by walls, or in a ravine).

Nach 1 kann das Gastsystem in den angegebenen Frequenzbändern arbeiten. Die maximale Sendeleistung der TE des Gastsystems ist dadurch begrenzt, dass die Empfänger des Gastgebers garantiert nicht ansprechen dürfen. Je nach verfügbarem Störabstand S/N ist die Technik des Gastsystems zu wählen (Modulation/Codierung/evtl. Spreizverfahren/...).To 1 the guest system can work in the specified frequency bands. The maximum transmission power of the TE of the guest system is limited by the fact that the recipients of the host are guaranteed not allowed to speak. Depending on the available signal-to-noise ratio S / N, the technique of the guest system must be selected (modulation / coding / possibly spreading method / ...).

Da es keine Frequenzbandzuteilung von zentraler Stelle gibt, muss ein TE allein entscheiden können, ob ein Frequenzband frei (d. h. noch nicht durch ein anderes TE belegt) ist. Nach der Erfindung wird die Übertragung im Gastsystem in kurzen Abständen ausgetastet, was die Unterscheidung freier und belegter Frequenzbänder ermöglicht (2).Since there is no frequency band allocation from a central location, a TE alone must be able to decide whether one frequency band is idle (ie not yet occupied by another TE). According to the invention, the transmission in the guest system is blanked out at short intervals, which makes it possible to distinguish between free and occupied frequency bands ( 2 ).

Bei bekannten Funksystemen wird ein Übertragungskanal bei Bedarf zugeteilt. Nach der Erfindung werden statt dessen Standverbindungen kleiner Bitrate aufgebaut, die dann bei Bedarf nur auf die gewünschte hohe Nutzbitrate umgeschaltet werden müssen. 3 zeigt den Burstaufbau. Ein TE hat ein freies Frequenzband belegt und möchte nun eine gerichtete Verbindung zu einem anderen TE aufbauen (Ruf). Man arbeitet innerhalb der kleinen Bandbreite b und sendet nur mit kleiner Bitrate. Die anderen TE erkennen durch ihre Leistungsüberwachung der Teilbänder, dass in einem Teilband neu gerufen wird und analysieren die Präambel. Die TE erkennen, an wen die Verbindung gerichtet ist. Damit ist der Aufbau einer unidirektionalen Verbindung zwischen zwei TE beendet. Die Verbindung wird weiterhin in der kleinen Bandbreite b betrieben und nur bei Bedarf auf die große Bandbreite B umgeschaltet.In known radio systems, a transmission channel is allocated as needed. According to the invention, stand-alone connections of small bit rate are instead established, which then have to be switched over to the desired high user bit rate, if necessary. 3 shows the burst structure. A TE has occupied a free frequency band and now wants to establish a directed connection to another TE (call). One works within the small bandwidth b and only transmits at a low bit rate. The other TEs recognize, by virtue of their performance monitoring of the subbands, that a new subclass is called and analyze the preamble. The TEs recognize who the connection is for. This completes the construction of a unidirectional connection between two TEs. The connection is still operated in the small bandwidth b and switched to the large bandwidth B only when needed.

Wird eine bidirektionale Verbindung gewünscht, so muss die Gegenrichtung realisiert werden. Da ohnehin im Burstbetrieb gearbeitet wird, denkt man natürlich zuerst an Zeitgetrenntlage (Ping-Pong). Aus dem nachstehend genannten Grund ist aber Frequenzgetrenntlage vorzuziehen. Das System nach der Erfindung hat als obersten Grundsatz, dass der Gastgeber in keiner Weise beeinträchtigt oder gestört werden darf. Das bedeutet: Wenn in einem vom Gastsystem genutzten Frequenzband die vom Gastgeber empfangene Leistung über die Schwelle ansteigt (z. B. durch Inbetriebnahme eines neuen Senders beim Gastgeber), dann muss das Gastsystem sofort abgeschaltet werden. Da bei Ping-Pong beide Übertragungsrichtungen im gleichen Frequenzband untergebracht sind, ist die Verbindung zwischen beiden TE plötzlich völlig getrennt. Deshalb baut das gerufene TE die Gegenrichtung bewusst in einem anderen Frequenzband auf. Bei Störung einer Übertragungsrichtung kann dann die noch intakte Verbindung in Zeitgetrenntlage (mit reduzirter Bitrate) betrieben werden.Becomes a bidirectional connection is desired, so the opposite direction will be realized. As is already working in burst mode, thinks you, of course first at time separation (ping-pong). For the reason stated below but is preferable to frequency separation. The system according to the invention has as the overriding principle that the host is in no way impaired or disturbed may be. That means: if in one used by the guest Frequency band the power received by the host over the Threshold rises (eg by commissioning a new transmitter at the host), then the guest system must be switched off immediately. There at Ping-Pong both transmission directions housed in the same frequency band is the connection between both TE suddenly completely separated. Therefore, the called TE builds aware of the opposite direction in a different frequency band. If a transmission direction is disturbed, then still intact connection in time separation (with reduced bit rate) operate.

Mit Rücksicht auf große Nutzbitraten ist B typisch um wenigstens drei Größenordnungen größer als b. Es bieten sich deshalb leistungsfähige Spreizverfahren (spread spectrum, direct sequence) an, um den im Gastsystem notwendigen Störabstand zu reduzieren.With consideration on big Usable bit rate is typically greater than B by at least three orders of magnitude b. Therefore, there are powerful spreading methods (spread spectrum, direct sequence) in order to provide the necessary in the guest system SNR to reduce.

Bei einem System mit n TE, die durch bidirektionale Verbindungen voll vermascht werden sollen, muss jedes TE (n – 1) Sender und (n – 1) Empfänger haben. 4 zeigt das Beispiel n = 4. In diesem „Mobilen Verband" kennt man von allen Verbindungen Sende- und Empfangsleistung. Freiraumausbreitung zwischen Kugelstrahlern vorausgesetzt, sind damit alle Entfernungen bekannt, d. h. innerhalb des Mobilen Verbandes besteht eine recht genaue relative Ortung. Praktisch wird die Ortungsgenauigkeit dadurch verschlechtert, dass meist keine Freiraumausbreitung gegeben ist; es treten Zusatzdämpfungen auf. Die Empfangsleistung wird kleiner als bei Freiraumausbreitung; dadurch wird die Entfernung zu groß berechnet. Da ein voll vermaschtes System nach der Erfindung mehr Bestimmungsgleichungen als benötigt bietet, gibt es bei Bedarf Möglichkeiten zur Optimierung der Ortung.In a system with n TE, which should be fully meshed by bidirectional connections, each TE (n - 1) transmitter and (n - 1) transmitter must be used have catchers. 4 shows the example n = 4. In this "mobile association" one knows from all connections transmitting and receiving power.Primary propagation of free space between ball radiators, so that all distances are known, ie within the mobile association there is a fairly accurate relative location.Practical becomes the locating accuracy The reception power is smaller than in free space propagation, thus the distance is calculated too large. <br /><br/> Since a fully meshed system according to the invention offers more equations of fit than needed, there are possibilities if needed to optimize the location.

Im Mobilen Verband kommt es oft vor, dass einige TE ihre absoluten Ortskoordinaten kennen, z. B. weil sie über GPS verfügen. Wenn das der Fall ist, kennen damit alle Teilnehmer ihre absoluten Koordinaten.in the Mobile association often happens that some te their absolute Know location coordinates, z. Because they have GPS. If This is the case, so that all participants know their absolute coordinates.

Der Mobile Verband nach der Erfindung ist autark und benötigt die etablierten standardisierten Systeme nicht. Aber natürlich kann der Wunsch eines TE im Mobilen Verband auftreten, eine Verbindung ins weltweite Nachrichtennetz zu bekommen. 5 zeigt eine Lösung für ein Gateway.The mobile dressing according to the invention is self-sufficient and does not require the established standardized systems. But of course, the desire of a TE in the Mobile Association can occur to get a connection to the worldwide news network. 5 shows a solution for a gateway.

Claims (5)

Funksystem mit mobilen Teilnehmer-Endgeräten (TE), dadurch gekennzeichnet, dass keine zentralen Einrichtungen benötigt werden und dass in Frequenzbereichen gearbeitet wird, die anderen Systemen exklusiv zugeteilt sind.Radio system with mobile subscriber terminals (TE), characterized in that no central facilities are needed and that work is done in frequency ranges that are exclusively allocated to other systems. Funksystem nach Anspruch 1, dadurch gekennzeichnet, dass die TE durch Standverbindungen kleiner Bitrate verbunden sind.Radio system according to claim 1, characterized in that the TE are connected by low-bit-rate fixed connections. Funksystem nach Anspruch 1 und 2, dadurch gekennzeichnet, dass Spreizverfahren eingesetzt werden.Radio system according to claim 1 and 2, characterized in that Spreading method can be used. Funksystem nach Anspruch 2, dadurch gekennzeichnet, dass Informationen über die Verbindungen zur Ortung ausgenutzt werden.Radio system according to claim 2, characterized in that information about the Connections for locating be exploited. Funksystem nach Anspruch 1, dadurch gekennzeichnet, dass die Funktechnik nach der Erfindung für ein Gateway zum/vom öffentlichen Netz eingesetzt wird.Radio system according to claim 1, characterized in that the Radio technology according to the invention for a gateway to / from the public Network is used.
DE200810003710 2008-01-09 2008-01-09 Radio system i.e. host system, for use with public network, has mobile subscriber-terminal connected by point-to-point connections, where central devices e.g. mobile devices, are not needed and other systems are exclusively allocated Withdrawn DE102008003710A1 (en)

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DE200810003710 DE102008003710A1 (en) 2008-01-09 2008-01-09 Radio system i.e. host system, for use with public network, has mobile subscriber-terminal connected by point-to-point connections, where central devices e.g. mobile devices, are not needed and other systems are exclusively allocated

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DE200810003710 DE102008003710A1 (en) 2008-01-09 2008-01-09 Radio system i.e. host system, for use with public network, has mobile subscriber-terminal connected by point-to-point connections, where central devices e.g. mobile devices, are not needed and other systems are exclusively allocated

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014179860A1 (en) 2013-05-07 2014-11-13 Blackberry Limited Method and apparatus for contention free device signaling without a controlling network node

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014179860A1 (en) 2013-05-07 2014-11-13 Blackberry Limited Method and apparatus for contention free device signaling without a controlling network node
EP2995170A4 (en) * 2013-05-07 2016-04-27 Blackberry Ltd Method and apparatus for contention free device signaling without a controlling network node

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