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 EP19960904733 EP96904733A EP0815699A1 EP 0815699 A1 EP0815699 A1 EP 0815699A1 EP 19960904733 EP19960904733 EP 19960904733 EP 96904733 A EP96904733 A EP 96904733A EP 0815699 A1 EP0815699 A1 EP 0815699A1
Authority
EP
Grant status
Application
Patent type
Prior art keywords
station
antenna
mobile
base
device
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
EP19960904733
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

Links

Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATIONS NETWORKS
    • H04W16/00Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
    • H04W16/24Cell structures
    • H04W16/28Cell structures using beam steering

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

description

Mobile base station antenna characteristic variable

The invention relates to a base station according to the preamble of claim 1.

The range in a mobile radio system, for example a schnurlo¬ sen telephone, which consists of a base station and one or several mobile stations ren is essentially determined by its transmit power and its receiver sensitivity. In this case, the transmission power is evenly generally in all directions, that is at least approximately point-symmetrical abge¬ irradiated to be universally usable in any environment on the one hand and in each direction the same Reich¬ to the other to achieve wide. However, a single time seeks be¬, then from the perspective of the base station, ie in to Example of the base station of a cordless telephone, only a fraction of the transmission power in the direction of that are available at this moment in operation the mobile station, ie in to Example the handset of the cordless phone, radiated. The vast majority of the transmit power is not used, however, it acts to other devices even disturbing. The range of radiation is limited by the transmit power, the path loss and the received power. The

Path loss is a fixed factor and can not be reduced. The transmit power can not be increased arbitrarily. In principle, the received power and thus the range, by a directed transmission, so that by using a bundled directional antenna wel¬ che the available energy is concentrated in a particular direction radiates be increased. The use of directional antennas in radio systems for this purpose is corresponding to general my known.

The object of the invention is, by designing the Fest¬ station an advantageous possibility to improve the transmission response between the Festεtation and Mo¬ bilstationen a mobile radio system, in particular to provide a Schnurlostelefonε.

This object is at a fixed station in accordance with the Oberbe¬ handle of claim 1 achieved by the features specified in the characterizing part of this patent claim.

Advantageous further developments and embodiments indicated in the patent claim l base station are given in the claims 2 to. 6

In the following, a base station according to the invention is explained with reference to an erläu- shown in a block diagram, FIG.

In this base station of a Mobilfunksystemε it may, for example, to the base station of a standard of operating according to the DECT standard cordless telephone.

The fixed station shown comprises an antenna device l, which is connected via an antenna switch 2 to either a transmitter 3 or to a receiver. 4 The antenna device 1 is provided as a plurality of individual radiating antenna up oriented group (array) formed whose Strah¬ lung characteristic to a directional beam pattern ge can be formed. Depending on the connection and disconnection of individual radiating antenna of this group and / or depending on the activation of certain phase relationships between these individual emitters, a suitable directional beam pattern can be prepared, and these can then be oriented in different directions.

The fixed station shown in the figure includes the input position of the radiation characteristic of the antenna device l a control unit. 5 The shape of a a focused directional beam having radiation characteristics of this arrival antenna device 1 is always adapted to the instantaneous location of those mobile station is sent to the out under connection of the transmitter 3 at the relevant time or the forth under connection of the receiver 4 at the relevant time is received. The drive data for the Ein¬ position of the respective radiation characteristic of the antenna device 1 are based on an algorithm from the measured in the control unit 5 in a measuring device 6 Empfangsfeidstärke and / or directly from the received data using a digi- tal device 7, in which

Bit / burst errors are detected, slides. er¬ the actual computational evaluation for determining the drive data follows in the algorithm performing the central part 8 of the control unit 5 are included in the control unit 5 in a tank supply direction 9, the corresponding radiation patterns for 1 to n mobile stations in the form of drive data for the Anten¬ neneinrichtung l cached.

In the storage device 9 of the control unit 1, two radiation characteristics can be abge¬ stores in an advantageous manner, the difference of which corresponds to only a minor change in the characteristic. Hereby it is achieved that there is received interrupts are prevented by fading holes at a non-moving mobile station.

Claims

claims
1. Fixed station of on the radio link for a digital time division multiple access (TDMA = Time Division Multiple Access) -Verfah- ren working Mobilfunksystemε, in particular one of a base station and one or more handsets bestehen¬ the cordless telephone according to the DECT standard, with a hin¬ visibly its radiation characteristic variable Anten¬ neneinrichtung, characterized in that a control unit for adjusting the Strahlungscharakteri¬ is stic provided so that this location in the form of a switchable directional antenna characteristic εtets the instantaneous Stand¬ that mobile station is adapted to sent to the taken out for loading time or is received by the at that time.
2. Base station according to claim 1, characterized in that in the control unit (5), the drive data for the adjustment of the respective radiation pattern of Antenneneinrich¬ device (1) on the basis of an algorithm from the reception field strength and / or directly from the received digital data abgelei¬ be tet.
3. Base station according to claims 1 and 2 characterized in that a storage device (9) is provided in the control unit (5) in which the associated Strahlungscharakteriεtiken the antenna device (1) potentially available for l biε n stem in a Mobilfunksy¬ mobile stations in shape of the driving data for the antenna device are zwischengeεpei- chert.
4. Base station according to claim 3, characterized in that to each mobile station two radiation characteristics of the antenna device (l) are stored, which difference corresponds to only a minor change in the characteristic so that resulting from fading holes Empfangsunterbrechun- gene in a non-moving mobile station by Her¬ beiführung a change between these two Antennencha¬ be prevented rakteristiken.
5. Base station according to one of the preceding claims, characterized in that the antenna means (1) is constructed as group antenna with mehre¬ ren individual radiators, moving to achieve different radiation characteristics of the Antennenein¬ device on or off and / or phase by under- be geεpeist εchiedlich can.
6. Base station according to one of the preceding claims, characterized in that the switching of the various Strahlungscharakteri- stiken the antenna device (l) from burst to burst er¬ follows.
EP19960904733 1995-03-20 1996-03-04 Fixed station of a mobile radio-telephone system with changeable aerial characteristic Ceased EP0815699A1 (en)

Priority Applications (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 true EP0815699A1 (en) 1998-01-07

Family

ID=7757154

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19960904733 Ceased EP0815699A1 (en) 1995-03-20 1996-03-04 Fixed station of a mobile radio-telephone system with changeable aerial characteristic

Country Status (4)

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

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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 Beam width control method in the 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 Method and apparatus for controlling an array antenna
DE19724087A1 (en) * 1997-06-07 1998-12-10 Fraunhofer Ges Forschung Transceiver for high frequency radiation and methods for high frequency transmission
KR100468820B1 (en) * 1997-08-04 2005-01-20 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
DE69709696D1 (en) * 1997-10-28 2002-02-21 Ericsson Telefon Ab L M Antenna for route search
GB0016186D0 (en) * 2000-06-30 2000-08-23 Nokia Networks Oy Antenna system

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58151142A (en) * 1982-03-04 1983-09-08 Nec Corp Time division multiplex connecting device
DE69312381T2 (en) * 1992-04-29 1997-11-20 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

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9629836A1 *

Also Published As

Publication number Publication date Type
JPH10505213A (en) 1998-05-19 application
CA2215788A1 (en) 1996-09-26 application
WO1996029836A1 (en) 1996-09-26 application

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Legal Events

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Effective date: 19970902

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Effective date: 20000621

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Effective date: 20001214