EP0815699A1 - Fixed station of a mobile radio-telephone system with changeable aerial characteristic - Google Patents

Fixed station of a mobile radio-telephone system with changeable aerial characteristic

Info

Publication number
EP0815699A1
EP0815699A1 EP96904733A EP96904733A EP0815699A1 EP 0815699 A1 EP0815699 A1 EP 0815699A1 EP 96904733 A EP96904733 A EP 96904733A EP 96904733 A EP96904733 A EP 96904733A EP 0815699 A1 EP0815699 A1 EP 0815699A1
Authority
EP
European Patent Office
Prior art keywords
base station
antenna device
radiation characteristics
antenna
mobile
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.)
Ceased
Application number
EP96904733A
Other languages
German (de)
French (fr)
Inventor
Klaus-Dieter Pillekamp
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.)
Siemens AG
Original Assignee
Siemens AG
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 Siemens AG filed Critical Siemens AG
Publication of EP0815699A1 publication Critical patent/EP0815699A1/en
Ceased legal-status Critical Current

Links

Classifications

    • 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
    • H04W16/24—Cell structures
    • H04W16/28—Cell structures using beam steering

Definitions

  • the invention relates to a fixed station according to the preamble of claim 1.
  • the range in a mobile radio system e.g. A cordless telephone, which consists of a base station and one or more mobile stations, is essentially determined by its transmission power and its receiver sensitivity.
  • the transmission power is usually even in all directions, i.e. radiated at least approximately point symmetrically, on the one hand to be universally applicable in any environment and on the other hand to achieve the same range in every direction.
  • only a fraction of the transmission energy is directed in the direction of the mobile station that is currently in operation, that is to say in the example the handset of the cordless telephone.
  • the vast majority of transmission energy on the other hand, is not used and can even interfere with third-party devices.
  • the range of the radiation is limited by the transmission power, the path loss and the reception power.
  • Track loss is a fixed factor and cannot be reduced.
  • the transmission power cannot be increased arbitrarily.
  • the reception power and thus the range can be achieved by a directional transmission, i.e. This means that the use of a directional antenna, which radiates the available energy in a concentrated direction, increases the use.
  • the use of directional antennas in radio systems for this purpose is generally known.
  • the object of the invention is, by designing the fixed station, to advantageously improve the To create transmission behavior between the fixed station and the mobile stations of a mobile radio system, in particular a cordless telephone.
  • a base station according to the invention is explained below with reference to a block diagram shown in a figure.
  • This base station of a mobile radio system can be, for example, the base station of a cordless telephone working according to the DECT standard.
  • the base station shown has an antenna device 1, which is connected via an antenna switch 2 either to a transmitter 3 or to a receiver 4.
  • the antenna device 1 is designed as a group antenna (array) having a plurality of individual radiators, the radiation characteristics of which can be shaped into a directional beam characteristic. Depending on the connection and disconnection of individual radiators of this group antenna and / or depending on the activation of certain phase relationships between these individual radiators, a suitable directional beam characteristic can be created, which can then be oriented in different directions.
  • the fixed station shown in the figure contains a control unit 5 for setting the radiation characteristics of the antenna device 1.
  • the radiation characteristic of this application which has the shape of a bundled directional beam
  • the antenna device 1 is always adapted to the current location of that mobile station to which the transmitter 3 is switched on at the relevant time or from which the receiver 4 is received at the relevant time when the receiver 4 is switched on.
  • the control data for the setting of the respective radiation characteristics of the antenna device 1 are based on an algorithm from the reception field strength measured in the control unit 5 in a measuring device 6 and / or directly from the received digital data with the aid of a device 7, in which
  • Bit / burst errors are detected, derived.
  • the actual computational evaluation for determining the control data takes place in a central part 8 of the control unit 5 that executes the algorithm.
  • the associated radiation characteristics for 1 to n mobile stations in the form of the control data for the antenna device are in a memory device 9 l cached.
  • two radiation characteristics can be advantageously stored, the difference of which corresponds to only a slight change in the characteristic. This ensures that interruptions in reception due to fading holes in a non-moving mobile station are prevented.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

The directional radiation characteristic of the aerial system (1) of the fixed station of a mobile radio-telephone system operating with a digital time-multiplex (TDMA) process is matched to the current location of the mobile station which is transmitting or being received at that time. The invention can advantageously be used in radio-telephones on the DECT standard.

Description

Beschreibungdescription
Mobilfunkfeststation mit veränderbarer AntennencharakteristikMobile base station with changeable antenna characteristics
Die Erfindung bezieht sich auf eine Feststation gemäß dem Oberbegriff des Patentanspruchs 1.The invention relates to a fixed station according to the preamble of claim 1.
Die Reichweite in einem Mobilfunksystem, z.B. einem schnurlo¬ sen Telefon, das aus einer Feststation und einer oder mehre- ren Mobilstationen besteht, wird im wesentlichen durch seine Sendeleistung und seine Empfängerempfindlichkeit bestimmt. Dabei wird die Sendeleistung in der Regel in alle Richtungen gleichmäßig, d.h. zumindest angenähert punktsymmetrisch abge¬ strahlt, um zum einen universell in jeder Umgebung einsetzbar zu sein und zum anderen in jeder Richtung die gleiche Reich¬ weite zu erzielen. Wird jedoch ein einzelner Zeitpunkt be¬ trachtet, so wird aus der Sicht der Feststation, also im Bei¬ spiel der Basisstation eines schnurlosen Telefons, nur ein Bruchteil der Sendeenergie in Richtung der sich in diesem Augenblick in Betrieb befindenden Mobilstation, also im Bei¬ spiel dem Mobilteil des schnurlosen Telefons, abgestrahlt. Der weitaus größte Teil der Sendeenergie wird dagegen nicht genutzt und kann auf fremde Geräte sogar störend wirken. Die Reichweite der Strahlung ist durch die Sendeleistung, die Streckendämpfung und die Empfangsleistung begrenzt. DieThe range in a mobile radio system, e.g. A cordless telephone, which consists of a base station and one or more mobile stations, is essentially determined by its transmission power and its receiver sensitivity. The transmission power is usually even in all directions, i.e. radiated at least approximately point symmetrically, on the one hand to be universally applicable in any environment and on the other hand to achieve the same range in every direction. However, if a single point in time is considered, from the point of view of the base station, that is to say in the example of the base station of a cordless telephone, only a fraction of the transmission energy is directed in the direction of the mobile station that is currently in operation, that is to say in the example the handset of the cordless telephone. The vast majority of transmission energy, on the other hand, is not used and can even interfere with third-party devices. The range of the radiation is limited by the transmission power, the path loss and the reception power. The
Streckendämpfung ist dabei ein feststehender Faktor und kann nicht reduziert werden. Die Sendeleistung läßt sich nicht beliebig erhöhen. Prinzipiell kann die Empfangsleistung und damit die Reichweite durch eine gerichtete Übertragung, d.h. also durch die Verwendung einer bündelnden Richtantenne, wel¬ che die zur Verfügung stehende Energie konzentriert in eine bestimmte Richtung abstrahlt, erhöht werden. Die Verwendung von Richtantennen in Funksystemen zu diesem Zweck ist allge¬ mein bekannt.Track loss is a fixed factor and cannot be reduced. The transmission power cannot be increased arbitrarily. In principle, the reception power and thus the range can be achieved by a directional transmission, i.e. This means that the use of a directional antenna, which radiates the available energy in a concentrated direction, increases the use. The use of directional antennas in radio systems for this purpose is generally known.
Aufgabe der Erfindung ist es, durch Ausgestaltung der Fest¬ station eine vorteilhafte Möglichkeit zur Verbesserung des Übertragungsverhaltens zwischen der Festεtation und den Mo¬ bilstationen eines Mobilfunksystems, insbesondere eines Schnurlostelefonε, zu schaffen.The object of the invention is, by designing the fixed station, to advantageously improve the To create transmission behavior between the fixed station and the mobile stations of a mobile radio system, in particular a cordless telephone.
Diese Aufgabe wird bei einer Feststation gemäß dem Oberbe¬ griff des Patentanspruchs 1 durch die im kennzeichnenden Teil dieses Patentanspruchs angegebenen Merkmale gelöst.This object is achieved in a fixed station according to the preamble of claim 1 by the features specified in the characterizing part of this claim.
Zweckmäßige Weiterbildungen und Ausgestaltungen der im Pa- tentanspruch l angegebenen Feststation sind in den Ansprüchen 2 bis 6 angegeben.Appropriate developments and refinements of the base station specified in claim 1 are specified in claims 2 to 6.
Im folgenden wird anhand eines in einer Figur dargestellten Blockschaltbilds eine Feststation nach der Erfindung erläu- tert.A base station according to the invention is explained below with reference to a block diagram shown in a figure.
Bei dieser Feststation eines Mobilfunksystemε kann es sich beispielsweise um die Basisstation eines nach dem DECT-Stan- dard arbeitenden schnurlosen Telefons handeln.This base station of a mobile radio system can be, for example, the base station of a cordless telephone working according to the DECT standard.
Die dargestellte Feststation weist eine Antenneneinrichtung l auf, die über einen Antennenumschalter 2 entweder an einen Sender 3 oder an einen Empfänger 4 angeschlossen ist. Die Antenneneinrichtung 1 ist als mehrere einzelne Strahler auf- weisende Gruppenantenne (Array) ausgebildet, deren Strah¬ lungscharakteristik zu einer Richtstrahlcharakteristik ge¬ formt werden kann. Je nach Zu- und Abschaltung einzelner Strahler dieser Gruppenantenne und/oder je nach Einschaltung bestimmter Phasenverhältnisse zwischen diesen einzelnen Strahlern läßt sich eine geeignete Richtstrahlcharakteristik erstellen, wobei diese dann in unterschiedlichen Richtungen ausgerichtet sein kann.The base station shown has an antenna device 1, which is connected via an antenna switch 2 either to a transmitter 3 or to a receiver 4. The antenna device 1 is designed as a group antenna (array) having a plurality of individual radiators, the radiation characteristics of which can be shaped into a directional beam characteristic. Depending on the connection and disconnection of individual radiators of this group antenna and / or depending on the activation of certain phase relationships between these individual radiators, a suitable directional beam characteristic can be created, which can then be oriented in different directions.
Die in der Figur dargestellte Feststation enthält zur Ein- Stellung der Strahlungscharakteristik der Antenneneinrichtung l ein Steuerwerk 5 . Die die Form eines eines gebündelten Richtstrahls aufweisende Strahlungscharakteristik dieser An- tenneneinrichtung 1 wird stets dem augenblicklichen Standort derjenigen Mobilstation angepaßt, zu der hin unter Anschal- tung des Senders 3 zum betreffenden Zeitpunkt gesendet oder von der her unter Anschaltung des Empfängers 4 zum betreffen- den Zeitpunkt empfangen wird. Die Ansteuerdaten für die Ein¬ stellung der jeweiligen Strahlungscharakteristik der Antenneneinrichtung 1 werden anhand eines Algorithmus aus der im Steuerwerk 5 in einer Meßeinrichtung 6 gemessenen Empfangsfeidstärke und/oder direkt aus den empfangenen digi- talen Daten mit Hilfe einer Einrichtung 7, in welcherThe fixed station shown in the figure contains a control unit 5 for setting the radiation characteristics of the antenna device 1. The radiation characteristic of this application, which has the shape of a bundled directional beam, The antenna device 1 is always adapted to the current location of that mobile station to which the transmitter 3 is switched on at the relevant time or from which the receiver 4 is received at the relevant time when the receiver 4 is switched on. The control data for the setting of the respective radiation characteristics of the antenna device 1 are based on an algorithm from the reception field strength measured in the control unit 5 in a measuring device 6 and / or directly from the received digital data with the aid of a device 7, in which
Bit/Burstfehler erkannt werden, abgleitet. Die tatsächliche rechnerische Auswertung zur Festlegung der Ansteuerdaten er¬ folgt in einem den Algorithmus ausführenden zentralen Teil 8 des Steuerwerks 5. Im Steuerwerk 5 sind in einer Speichervor- richtung 9 die zugehörigen Strahlungscharakteristiken für 1 bis n Mobilstationen in Form der Ansteuerdaten für die Anten¬ neneinrichtung l zwischengespeichert.Bit / burst errors are detected, derived. The actual computational evaluation for determining the control data takes place in a central part 8 of the control unit 5 that executes the algorithm. In the control unit 5, the associated radiation characteristics for 1 to n mobile stations in the form of the control data for the antenna device are in a memory device 9 l cached.
In der Speichervorrichtung 9 des Steuerwerks 1 können in vor- teilhafter Weise auch zwei Strahlungscharakteristiken abge¬ speichert werden, deren Differenz nur einer geringfügigen Änderung der Charakteristik entspricht. Hiermit wird er¬ reicht, daß Empfangsunterbrechungen durch Fading-Löcher bei einer sich nicht bewegenden Mobilstation verhindert werden. In the memory device 9 of the control unit 1, two radiation characteristics can be advantageously stored, the difference of which corresponds to only a slight change in the characteristic. This ensures that interruptions in reception due to fading holes in a non-moving mobile station are prevented.

Claims

Patentansprüche claims
1. Feststation eines auf der Funkstrecke nach einem digitalen Zeitmultiplex (TDMA = Time Division Multiple Access) -Verfah- ren arbeitenden Mobilfunksystemε, insbesondere eines aus einer Basisstation und einem oder mehr Mobilteilen bestehen¬ den schnurlosen Telefons nach DECT-Standard, mit einer hin¬ sichtlich ihrer Strahlungscharakteristik veränderbaren Anten¬ neneinrichtung, d a d u r c h g e k e n n z e i c h n e t , daß ein Steuerwerk zur Einstellung der Strahlungscharakteri¬ stik vorgesehen ist, so daß diese in Form einer umschaltbaren Richtantennencharakteristik εtets dem augenblicklichen Stand¬ ort derjenigen Mobilstation angepaßt ist, zu der hin zum be- treffenden Zeitpunkt gesendet oder von der zum betreffenden Zeitpunkt empfangen wird.1. Base station of a mobile radio system operating on the radio link according to a digital time division multiple access (TDMA = Time Division Multiple Access) method, in particular one of the cordless telephones according to the DECT standard consisting of a base station and one or more mobile parts, with an additional telephone Visibly changing their radiation characteristics antenna device, characterized in that a control unit is provided for setting the radiation characteristics, so that this is in the form of a switchable directional antenna characteristic is always adapted to the current location of the mobile station that is being transmitted at the relevant time or from which is received at the relevant time.
2. Feststation nach Anspruch 1, d a d u r c h g e k e n n z e i c h n e t , daß im Steuerwerk (5) die Ansteuerdaten für die Einstellung der jeweiligen Strahlungscharakteristik der Antenneneinrich¬ tung (1) anhand eines Algorithmus aus der Empfangsfeldstärke und/oder direkt aus den empfangenen digitalen Daten abgelei¬ tet werden.2. Base station according to claim 1, so that the control data for setting the respective radiation characteristics of the antenna device (1) are derived from the received field strength and / or directly from the received digital data in the control unit (5).
3. Feststation nach den Ansprüchen 1 und 2 d a d u r c h g e k e n n z e i c h n e t , daß im Steuerwerk (5) eine Speichervorrichtung (9) vorgesehen ist, in welcher die zugehörigen Strahlungscharakteriεtiken der Antenneneinrichtung (1) für l biε n in einem Mobilfunksy¬ stem potentiell zur Verfügung stehende Mobilstationen in Form der Ansteuerdaten für die Antenneneinrichtung zwischengeεpei- chert sind.3. base station according to claims 1 and 2, characterized in that in the control unit (5) a memory device (9) is provided in which the associated radiation characteristics of the antenna device (1) for l biε n in a Mobilfunksy¬ system potentially available mobile stations in Form of the control data for the antenna device are buffered.
4. Feststation nach Anspruch 3, d a d u r c h g e k e n n z e i c h n e t , daß zu jeder Mobilstation zwei Strahlungscharakteristiken der Antenneneinrichtung (l) abgespeichert sind, deren Differenz nur eine geringfügige Änderung der Charakteristik entspricht, so daß durch Fading-Löcher entstehende Empfangsunterbrechun- gen bei einer sich nicht bewegenden Mobilstation durch Her¬ beiführung eines Wechsels zwischen diesen beiden Antennencha¬ rakteristiken verhindert werden.4. base station according to claim 3, characterized in that for each mobile station two radiation characteristics of the antenna device (1) are stored, the difference of which corresponds to only a slight change in the characteristic, so that reception interruptions caused by fading holes in a non-moving mobile station by bringing about a change between these two antenna channels ¬ characteristics can be prevented.
5. Feststation nach einem der vorhergehenden Ansprüche, d a d u r c h g e k e n n z e i c h n e t , daß die Antenneneinrichtung (1) als Gruppenantenne mit mehre¬ ren einzelnen Strahlern ausgebildet ist, die zur Erzielung unterschiedlicher Strahlungscharakteristiken der Antennenein¬ richtung zu- oder abgeschaltet und/oder phasenmäßig unter- εchiedlich geεpeist werden können.5. Base station according to one of the preceding claims, characterized in that the antenna device (1) is designed as a group antenna with mehre¬ ren individual radiators, which are switched on or off to achieve different radiation characteristics of the antenna device and / or are phase-fed differently can.
6. Feststation nach einem der vorhergehenden Ansprüche, d a d u r c h g e k e n n z e i c h n e t , daß die Umschaltung der verschiedenen Strahlungscharakteri- stiken der Antenneneinrichtung (l) von Burst zu Burst er¬ folgt. 6. Base station according to one of the preceding claims, that the switching of the different radiation characteristics of the antenna device (l) follows from burst to burst.
EP96904733A 1995-03-20 1996-03-04 Fixed station of a mobile radio-telephone system with changeable aerial characteristic Ceased EP0815699A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19510040 1995-03-20
DE19510040 1995-03-20
PCT/DE1996/000376 WO1996029836A1 (en) 1995-03-20 1996-03-04 Fixed station of a mobile radio-telephone system with changeable aerial characteristic

Publications (1)

Publication Number Publication Date
EP0815699A1 true EP0815699A1 (en) 1998-01-07

Family

ID=7757154

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96904733A Ceased EP0815699A1 (en) 1995-03-20 1996-03-04 Fixed station of a mobile radio-telephone system with changeable aerial characteristic

Country Status (5)

Country Link
EP (1) EP0815699A1 (en)
JP (1) JPH10505213A (en)
AU (1) AU4874796A (en)
CA (1) CA2215788A1 (en)
WO (1) WO1996029836A1 (en)

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GB9621465D0 (en) * 1996-10-15 1996-12-04 Northern Telecom Ltd A radio communications system adaptive antenna
JP3816162B2 (en) * 1996-10-18 2006-08-30 株式会社東芝 Beamwidth control method for adaptive antenna
US6301238B1 (en) * 1997-01-28 2001-10-09 Telefonaktiebolaget Lm Ericsson (Publ) Directional-beam generative apparatus and associated method
JP3405111B2 (en) * 1997-02-13 2003-05-12 Ｋｄｄｉ株式会社 Array antenna control method and device
DE19724087A1 (en) * 1997-06-07 1998-12-10 Fraunhofer Ges Forschung Transmitting and receiving device for high-frequency radiation and method for high-frequency transmission
KR100468820B1 (en) * 1997-08-04 2005-03-16 삼성전자주식회사 Adaptive phased array antenna using weight memory unit
US6108533A (en) * 1997-08-22 2000-08-22 Telefonaktiebolaget Lm Ericsson (Publ) Geographical database for radio system
US6288678B1 (en) 1997-10-28 2001-09-11 Telefonaktiebolaget Lm Ericsson (Publ) Path finder antenna
GB0016186D0 (en) 2000-06-30 2000-08-23 Nokia Networks Oy Antenna system
CN1172549C (en) * 2002-03-27 2004-10-20 大唐移动通信设备有限公司 Method for transmitting high speed down stream packet switched data in intelligence antenna mobile communication system

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JPS58151142A (en) * 1982-03-04 1983-09-08 Nec Corp Time division multiplex connecting device
SE514000C2 (en) * 1992-04-29 2000-12-11 Telia Ab Method and apparatus for reducing fading between base station and mobile units
US5488737A (en) * 1992-11-17 1996-01-30 Southwestern Bell Technology Resources, Inc. Land-based wireless communications system having a scanned directional antenna

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Also Published As

Publication number Publication date
JPH10505213A (en) 1998-05-19
AU4874796A (en) 1996-10-08
WO1996029836A1 (en) 1996-09-26
CA2215788A1 (en) 1996-09-26

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