WO2007023082A1 - Procede pour commuter d'une premiere antenne d'un module radio vers une deuxieme antenne de ce module radio - Google Patents

Procede pour commuter d'une premiere antenne d'un module radio vers une deuxieme antenne de ce module radio Download PDF

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Publication number
WO2007023082A1
WO2007023082A1 PCT/EP2006/065140 EP2006065140W WO2007023082A1 WO 2007023082 A1 WO2007023082 A1 WO 2007023082A1 EP 2006065140 W EP2006065140 W EP 2006065140W WO 2007023082 A1 WO2007023082 A1 WO 2007023082A1
Authority
WO
WIPO (PCT)
Prior art keywords
antenna
radio module
time
reception quality
switching
Prior art date
Application number
PCT/EP2006/065140
Other languages
German (de)
English (en)
Inventor
Jörg Romahn
Jörg Braune
Original Assignee
Siemens Aktiengesellschaft
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 Aktiengesellschaft filed Critical Siemens Aktiengesellschaft
Publication of WO2007023082A1 publication Critical patent/WO2007023082A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/08—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station
    • H04B7/0802—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station using antenna selection
    • H04B7/0805—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station using antenna selection with single receiver and antenna switching
    • H04B7/0814—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station using antenna selection with single receiver and antenna switching based on current reception conditions, e.g. switching to different antenna when signal level is below threshold

Definitions

  • the invention relates to a method for switching from a first antenna of a radio module to a second antenna of the radio module.
  • radio module In a radio module is an electronic component, which is used to establish a communication ⁇ connection via a mobile network.
  • the focus of the application of radio modules is ⁇ nowadays on the end customer business, ie the transmission of voice and data by users of mobile communication terminals, which in addition to other components, such as a display and a keyboard, also include a wireless module.
  • radio modules are also used in various other areas. An example of this is the use of radio modules in motor vehicles for example, to support applications in the field of telematics.
  • the present invention has for its object to provide a simple method for reducing impairments of the availability of a radio module for transmitting and / or receiving data and / or language.
  • This object is inventively achieved by a method for switching from a first antenna of a radio module to a second antenna of the radio module with the following Schrit ⁇ th: measuring the reception quality of the first antenna at a first time and storing the measurement result in a storage device, measuring the reception quality the first antenna at a later second time point, comparing the measurement result of the reception quality at the second time point with at least the last first-time measurement result and switching from the first antenna to the second antenna with a deterioration of the Empfangsquali-.
  • the reception quality for example, the reception field strength or the bit error rate can be used.
  • radio module of a mobile ⁇ network can be based one of a Basissta ⁇ example, when using tion of the cellular network broadcast time signal and the parameter RXLEV, which indicates the received field strength, and / or RXQUAL, which indicates the bit error rate, the Emp ⁇ quality of catch.
  • the inventive method is advantageous because it allows, by comparing the current reception quality of the first, used by the radio module antenna with at least the reception ⁇ quality at an earlier first time Stö ⁇ stanchions and to detect damage of the first antenna and a changeover to the make second antenna.
  • there a measurement of the reception quality of the first antenna preferably well-defined, preferably waive ⁇ voted events associated time points, as a result, the effort can be kept relatively low for the process of the invention.
  • the storing of the measurement result of the reception quality of the ten ers ⁇ antenna at the first time in the storage means is advantageous, since this measurement result can thus be kept for comparison with the reception quality at a later second time. This avoids that a switchover from the first antenna of the radio module to the second antenna of the radio module also takes place when the poor reception quality is not caused by the first antenna itself, but, for example, by influences of the environment or the mobile network used.
  • the mobile network used by the radio module can be, for example, a mobile radio network according to the
  • GSM Global System for Mobile Communications
  • GPRS General Package Radio Service
  • UMTS Universal Mobile Telecommunication System
  • HSDPA High Speed Downlink Packet Access
  • CDMA Code Division Multiple Access
  • DECT Digital Enhanced Cordless Telecommunications
  • Blue ⁇ tooth standard or the WLAN standard (Wireless Local Area Network) act.
  • Another advantage of the invention is that not only the cost of its implementation is low but especially existing equalizing algorithms ⁇ not be adversely affected. Coordination with other commonly used optimization algorithms men, such as As the so-called echo cancellation (“Echo Cancellation”) or the term “equalizer” use of filters for processing and equalization of audio frequencies is not required.
  • Echo Cancellation As the so-called echo cancellation ("Echo Cancellation") or the term “equalizer” use of filters for processing and equalization of audio frequencies is not required.
  • the inventive method can also take place so ⁇ that the switching of the first antenna is fed throughput on the second antenna only at a temperature above a predetermined threshold deterioration of reception quality.
  • This embodiment is preferred, since ⁇ is avoided by switching from the first antenna of the radio module to the second antenna of the radio module with a only slightly ge ⁇ slight deterioration of the quality of reception.
  • the method can be designed from ⁇ preferably also so that switching is only carried out on the second antenna, if at the second time, the reception quality of the second antenna is better than that of the first antenna. This avoids that a switchover from the first antenna to the second antenna is triggered even if this would result in a deterioration of the reception quality.
  • the fact that such ineffective switches be prevented, can preferably also be dispensed with algorithms for switching back from the second antenna of the radio module to the first antenna of the radio module, which cation to a Verkompli ⁇ the method would result.
  • the inventive method can also run as from ⁇ preferably that made when switching from the first antenna to the second antenna, a visual and / or audible signal for display and / or a message in an electrophotographic ⁇ African fault memory is stored.
  • a Visual and / or acoustic message and / or a message in an electronic fault memory is advantageous because it can be drawn attention to the deterioration of the reception quality of the first antenna and thus a possible defect.
  • This may for example in the form of In ⁇ lighting a signal or warning light, the Ausga ⁇ be a text on a display, a warning sound or an entry in an error memory in the form done a log file called.
  • the inventive method can also be configured so that an integrated in a transport medium ⁇ radio module is used as the radio module.
  • a radio module integrated in a means of transport is preferred since there is a risk of damage to the first antenna used, in particular in the case of means of transport.
  • there are at transport a variety of applications for use of a radio module such as breakdown reports, traffic monitoring, toll applications or function monitoring of transport, which require high availability of the radio module and used by him antenna for data transmission übli ⁇ chamba.
  • method according dung is so pronounced that the first time point ⁇ switching off the transport and the transport agent is used as the second time, the start-up.
  • the use of switching off the means of transport as a first time point and the starting of the means of transport as a second point in time is advantageous, as a means of transportation ⁇ conventional example does not make any change in location between the shutdown and startup. Due to constant local conditions, such as the surrounding development, a constant reception quality of the same th antenna of the radio module are expected. If this is unexpectedly not the case, this indicates damage to the first antenna, so that switching to the second antenna makes sense. Thus, preferably only switches to the attached to the radio module second antenna vice ⁇ when actually a defect of the first antenna is present, or due to other circumstances, the reception ⁇ the first antenna quality compared to the measurement of the reception quality to the previous first time decreases is.
  • the inventive method takes place so that an external, externally mounted on the transport and ne with the radio module electrically connected to the antenna and as the second formant ⁇ a module attached to the radio antenna is used as the first antenna.
  • This offers the advantage that the normally used exter ⁇ ne, on the outside of the transport-mounted first antenna ⁇ üb SHORT- compared to a mounted in the radio module, and thus localized in the transport second antenna comprises egg ⁇ ne better reception quality.
  • the conventional example ⁇ envelope closed on all sides shields a means of transport electromagnetic fields. In addition to a poorer reception quality, this also leads to higher energy consumption ⁇ the radio module.
  • the externally mounted on the transport antenna is more susceptible conditions for Bebuldi ⁇ why the possibility of switching attached to the to the radio module, usually better protected second antenna is advantageous.
  • the inventive method can be used preferably for beechi ⁇ ge kinds of transportation, such as ships, airplanes or trains.
  • the preferred embodiment runs the inventive method on such that a driving force generating ⁇ is used as a transport.
  • the use of a motor vehicle as a means of transport is preferred, since there are a large number of possible applications for data transmissions by means of radio modules, especially in the motor vehicle sector. This includes, in addition to the already mentioned areas of application of toll collection, breakdown notification, traffic and function monitoring other applications such as the transmission of alarm or emergency call signals or the transmission of diagnostic data of the motor vehicle to a workshop.
  • sol ⁇ che applications is a high availability of the radio module for transmitting and / or receiving desirable data or mandatory.
  • the inventive method can be purchasedbil ⁇ det, that in addition an antenna detection is performed, which triggers a switch from the first antenna to the second antenna when interrupting a DC electrical connection to the first antenna.
  • the combination Nati ⁇ on the comparison of the reception quality of the first antenna at a second time with at least the last measurement result relating to the first point in time is provided with an antenna detection via DC preferred, since the latter in the case responsive to the first antenna, for example due ei ⁇ nes accident or due to theft no longer exists at all.
  • the antenna detection via direct current preferably also independently of the measurement of the reception quality at the first and at the second time a switch to the second antenna of the radio module are triggered.
  • the figure shows a means of transport 1 in the form of a force ⁇ vehicle, which has a radio module 2, which is electrically connected to an external, attached to the transport means 1 first antenna 3.
  • a second antenna 4 is attached to the radio module 2.
  • the second antenna 4 may also be integrated in the radio module 2 itself.
  • the radio module 2 uses the first antenna 3 in the darg Robinsonen embodiment, both for the transmission of voice and packet data.
  • the reception quality of the first antenna 3 is measured and the measurement result is stored in a memory device not shown in the figure.
  • a damage in the form of a break point is indicated by a straight line approximately in the middle of the first antenna 3.
  • a new measurement of the reception quality of the first antenna 3 takes place.
  • the measurement result is then compared with the reception quality of the first antenna 3 at the first time, ie the evening before. Due to the nocturnal damage in this case a deterioration of the reception quality of the first antenna 3 is fixed ⁇ made and made a switch from the first antenna 3 to the second antenna 4. This means that the radio module 2 from this time, the second antenna 4 begin to Emp ⁇ and / or uses sending data.
  • the comparison can also be extended to take account of further earlier measurement values of the reception quality stored in the memory device. So it is possible for example that it is determined by a simple algorithm algo ⁇ that the reception quality is often poor in the morning at the start of mode 1, since the transport 1 is usually parked in a garage. This can be taken into account in the method that in such a case, for example, depending on the day of the week and the time, no switching from the first antenna 3 to the second antenna 4 of the radio module 2 is made.
  • a corresponding control of the decision to switch from the first antenna 3 to the second antenna 4 can be made, for example, by a control unit, which is preferably provided by a microprocessor of the radio module 2 or connected via an external interface.
  • a theft of the entire first antenna 3 can be detected by means of a direct current antenna detection (not shown in the figure), regardless of the second time at which a comparison of the current reception quality of the first antenna 3 with the reception quality is made at an earlier time. Speaks to the antenna detection, that is, it registers the loss of the first antenna 3, then regardless of the measurement of the reception quality to the first and to the second time, a switching to the second antenna 4 vorgenom ⁇ men.
  • the antenna detection via direct current can be carried out, for example, in the form of an alarm loop, through which a test current flows back through a resistor.
  • the first antenna 3 may be a dipole ring, ie as a so-called loop antenna, realized.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Radio Transmission System (AREA)
  • Variable-Direction Aerials And Aerial Arrays (AREA)

Abstract

L'invention concerne un procédé pour commuter d'une première antenne (3) d'un module radio (2) vers une deuxième antenne (4) de ce module radio (2). Le procédé selon l'invention comprend les étapes qui consistent : à mesurer la qualité de réception de la première antenne (3) à un premier moment, et à enregistrer ce résultat de mesure dans un dispositif de stockage ; à mesurer la qualité de réception de cette première antenne (3) plus tard à un deuxième moment ; à comparer le résultat de mesure de la qualité de réception effectué au deuxième moment avec le résultat de mesure de la qualité de réception réalisé au premier moment, et ; à commuter de la première antenne (3) vers la deuxième antenne (4), en cas de dégradation de la qualité de réception.
PCT/EP2006/065140 2005-08-23 2006-08-08 Procede pour commuter d'une premiere antenne d'un module radio vers une deuxieme antenne de ce module radio WO2007023082A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102005040604.1 2005-08-23
DE200510040604 DE102005040604B4 (de) 2005-08-23 2005-08-23 Verfahren zum Umschalten von einer ersten Antenne eines Funkmoduls auf eine zweite Antenne des Funkmoduls

Publications (1)

Publication Number Publication Date
WO2007023082A1 true WO2007023082A1 (fr) 2007-03-01

Family

ID=37401227

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2006/065140 WO2007023082A1 (fr) 2005-08-23 2006-08-08 Procede pour commuter d'une premiere antenne d'un module radio vers une deuxieme antenne de ce module radio

Country Status (2)

Country Link
DE (1) DE102005040604B4 (fr)
WO (1) WO2007023082A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5548836A (en) * 1993-07-27 1996-08-20 Matsushita Electric Industrial Co., Ltd. Diversity receiver
WO1997005706A1 (fr) * 1995-07-27 1997-02-13 Ericsson Inc. Procede et dispositif d'indication de l'etat operationnel ou non operationnel du branchement d'un poste radio portable sur l'ensemble mains libres d'un vehicule
DE19714967A1 (de) * 1996-04-17 1997-10-30 Nokia Mobile Phones Ltd Diversity-Verfahren, Funkempfänger und Funksystem
EP1460771A1 (fr) * 2003-03-19 2004-09-22 Sony Ericsson Mobile Communications AB Arrangement d'antennes commutable

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3536826A1 (de) * 1985-10-16 1987-04-16 Bosch Gmbh Robert Diversity-antenne fuer mobile funkgeraete
DE19923661A1 (de) * 1999-05-22 2000-11-23 Nokia Mobile Phones Ltd Antennenvorrichtung für ein Funktelefon in einem Fahrzeug

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5548836A (en) * 1993-07-27 1996-08-20 Matsushita Electric Industrial Co., Ltd. Diversity receiver
WO1997005706A1 (fr) * 1995-07-27 1997-02-13 Ericsson Inc. Procede et dispositif d'indication de l'etat operationnel ou non operationnel du branchement d'un poste radio portable sur l'ensemble mains libres d'un vehicule
DE19714967A1 (de) * 1996-04-17 1997-10-30 Nokia Mobile Phones Ltd Diversity-Verfahren, Funkempfänger und Funksystem
EP1460771A1 (fr) * 2003-03-19 2004-09-22 Sony Ericsson Mobile Communications AB Arrangement d'antennes commutable

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Publication number Publication date
DE102005040604A1 (de) 2007-03-01
DE102005040604B4 (de) 2009-02-26

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