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WO2003013020A1 - Dispositif et procede de reglage de la puissance de transmission dans un terminal radiomobile - Google Patents

Dispositif et procede de reglage de la puissance de transmission dans un terminal radiomobile Download PDF

Info

Publication number
WO2003013020A1
WO2003013020A1 PCT/DE2002/001886 DE0201886W WO03013020A1 WO 2003013020 A1 WO2003013020 A1 WO 2003013020A1 DE 0201886 W DE0201886 W DE 0201886W WO 03013020 A1 WO03013020 A1 WO 03013020A1
Authority
WO
WIPO (PCT)
Prior art keywords
mobile radio
radio terminal
transmission
operating parameter
user
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
PCT/DE2002/001886
Other languages
German (de)
English (en)
Other versions
WO2003013020A8 (fr
Inventor
Rainer Eckert
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
Siemens Corp
Original Assignee
Siemens AG
Siemens Corp
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, Siemens Corp filed Critical Siemens AG
Publication of WO2003013020A1 publication Critical patent/WO2003013020A1/fr
Anticipated expiration legal-status Critical
Publication of WO2003013020A8 publication Critical patent/WO2003013020A8/fr
Ceased legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. Transmission Power Control [TPC] or power classes
    • H04W52/04—Transmission power control [TPC]
    • H04W52/18—TPC being performed according to specific parameters
    • H04W52/28—TPC being performed according to specific parameters using user profile, e.g. mobile speed, priority or network state, e.g. standby, idle or non-transmission
    • H04W52/283—Power depending on the position of the mobile
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
    • H04B1/3827—Portable transceivers
    • H04B1/3833—Hand-held transceivers
    • H04B1/3838—Arrangements for reducing RF exposure to the user, e.g. by changing the shape of the transceiver while in use

Definitions

  • the invention relates to a method for regulating the transmission energy in a mobile radio terminal, in particular in a mobile telephone, and to such a mobile radio terminal.
  • Exchange of data can be used. Like conventional telephones for voice telephones, they can be used in a spatial position in which they are held against the head, in particular the ear, of a user. In doing so,
  • / Reception mode always also a certain proportion of the emitted electromagnetic radiation into the body, in particular into the head, of the person using the mobile radio terminal.
  • the SAR value is understood to be a determination in the near field of a mobile radio terminal according to certain specifications.
  • the SAR value on the head is significantly lower than on the wrist. Therefore, when the cellphone is attached to the wrist in the style of a wristwatch, it can transmit with higher power than when it is held to the head. Changes in limits for individual
  • an operating mode remote from the body on the other hand, it is less critical to emit electromagnetic radiation with higher energy.
  • Such an operating mode is present, for example, when the mobile radio terminal is operated at a sufficient distance from the body of the user, for example when the mobile radio terminal is operated by means of a hands-free device or when it is not for the exchange of voice information but in combination with a data processing system or a PDA for the exchange of non-language data.
  • This object is achieved by a method for regulating the transmission energy in a mobile radio terminal, in particular in a mobile phone, comprising the steps:
  • the method according to the invention can be used to determine in which operating state the mobile radio terminal is currently. So it can be determined whether it is in a normal
  • Voice telephony operating state in which the mobile radio terminal is held in a position close to the head, for example at the ear of a user, or whether the mobile radio terminal is operated in a position remote from the body, for example by using the voice telephony function by means of a Hands-free device, in particular a headset, or as a data transmission unit in connection with an electronic data processing system.
  • the transmission energy is limited to a predetermined upper limit value, which also limits the transmission energy emitted to the head of a user. This maximum transmission energy depends on the specified SAR limit values for the respective position on the body. As a result, the SAR limit value of a mobile radio terminal can be maintained, which works according to the method according to the invention.
  • transmission energy it means the product of transmission power and transmission time.
  • the transmission energy can be influenced by changing the current transmission power with which mobile radio signals are transmitted in the form of electromagnetic radiation, and / or by varying the transmission time over which the mobile radio signals are transmitted.
  • To influence the transmission power simply set an upper limit value depending on the operating parameter, which is then maintained by the transmitter electronics.
  • To influence the transmission time it is possible to change the number of time slots used for transmission. Both options, alone or in combination, lead to the setting of the transmission energy according to the invention.
  • the at least one operating parameter indicates the spatial position of the mobile radio terminal.
  • the spatial position can provide information as to whether the mobile radio terminal is held against the head of the user, in which case it is generally in a skewed position in the room with respect to a longitudinal axis through the mobile radio terminal. If, on the other hand, the longitudinal axis of the mobile radio terminal is horizontal in space, this indicates that the mobile radio terminal is on a horizontal surface, for example a table or the like, and cannot be operated in the immediate vicinity of a user's body.
  • the at least one operating parameter specifies whether the mobile radio terminal is worn on the body of the user, in particular on his head or wrist. This can be done, for example, by the at least one operating parameter indicating whether there is mechanical contact between the mobile radio terminal and the skin of the user.
  • the at least one operating parameter specifies whether an additional device, in particular a hands-free device, or a Data transmission cable to which the mobile radio terminal is connected. If an additional device, for example a hands-free device or a data transmission cable, is connected to the mobile radio terminal, this also indicates that the mobile radio terminal is not operated in close proximity to the user, so that a limitation of the maximum transmission energy is not necessary.
  • the at least one operating parameter specifies the type of transmission of the mobile radio terminal. If the mobile radio terminal is a terminal with which, in addition to normal voice transmission, data transmission methods, such as methods corresponding to the HSCSD (High Speed Circuit Switched Data) standard extension, the SMS (Short Message Service) standard extension or the GPRS (General Packet Radio Service) standard expansion can be carried out, the mobile terminal can record the current operating state depending on the type of data transmission.
  • HSCSD High Speed Circuit Switched Data
  • SMS Short Message Service
  • GPRS General Packet Radio Service
  • the mobile radio terminal is in HSCSD transmission mode, SMS transmission mode or in GPRS transmission mode, this indicates that no voice data are being exchanged, but that the mobile radio terminal is being used for data exchange with non-speech data and therefore not immediately - Telabel close body is operated to the user, so that a limitation of the transmission energy is not necessary for the reasons mentioned above.
  • the operating parameter determining the spatial position of the mobile radio terminal can be weighted less strongly than the operating parameter indicating the connection of an additional device, since the mobile radio terminal is brought into any spatial position even when it is held against the user's ear cup can.
  • the mobile phone could ask the user via an operating menu whether the operating mode or the position on the body was correctly recognized.
  • the user automatically enters the current operating state via an operating menu.
  • the at least one recorded operating parameter is compared with data previously stored in a memory, the comparison result being used to decide whether the mobile radio terminal is operated in the immediate vicinity of a user.
  • the upper limit to which the transmission power can be limited it can be provided according to the invention that this is at about 0.8 watts or e.g. is 2 watts. In any case, it should be just high enough that the SAR limit is not exceeded.
  • the mobile radio terminal contains a signal from a base station of a mobile radio network that communicates with it, if the current transmission energy is used for reliable data transmission. not sufficient.
  • the mobile radio terminal can output a corresponding acoustic or visually recognizable signal to the user, with which the user is informed that he should change the operating mode, for example by using a hands-free device instead of holding the mobile radio terminal to his ear.
  • the control switches off the maximum value restriction, so that the mobile radio terminal can transmit with higher transmission energy.
  • the invention further relates to a mobile radio terminal, in particular for carrying out the method of the type described above, comprising:
  • At least one sensor for detecting at least one operating parameter characterizing the current operating state
  • control unit for regulating the transmission energy of the transmission signal amplifier, the control unit controlling the transmission signal amplifier as a function of the at least one detected operating parameter for regulating the transmission energy.
  • Various sensors can be provided for detecting the at least one operating parameter, for example a spatial position sensor, in particular an inclination angle sensor, for detecting the spatial position of the mobile radio terminal, a skin contact sensor, in particular a skin resistance sensor, for detecting a mechanical contact between the Mobile radio terminal and the skin of the user, a connection sensor for detecting an additional device connected to the mobile radio terminal, a transmission type detection sensor for detecting the type of the current transmission of data by means of the mobile radio terminal or further sensors.
  • a carrying aid state sensor can be provided for detecting a state of a carrying aid for carrying the mobile radio terminal on the body of a user.
  • the mobile radio terminal can be worn on the user's wrist in the style of a wristwatch, the sensor detecting whether the bracelet is closed and regulating the transmission energy accordingly.
  • the position of the skin contact sensor can also provide information about the position. If the skin contact sensor on the front of the device (near the loudspeaker) is in contact, you can assume that the device is held up to your head. If the sensor on the back reports a contact, the mobile device is worn on the wrist.
  • a plurality of such sensors are preferably provided in the mobile radio terminal according to the invention.
  • control unit is assigned a memory in which comparison values are stored beforehand, the transmission energy being regulated as a function of a comparison of the comparison values with the at least one recorded operating parameter.
  • FIG. 1 shows a schematic block diagram of components of a mobile radio terminal relevant to the invention.
  • a mobile radio terminal according to the invention is generally designated 10. This comprises a plurality of sensors 12, 14, 16, 18.
  • the sensor 12 is used to detect the spatial position of the mobile radio terminal 10 and is designed as an inclination angle sensor.
  • the sensor 12 detects and outputs via the line 20 an angle of inclination by which the longitudinal axis of the mobile radio Terminal is inclined relative to a predefined perpendicular in space.
  • the sensor 14 is designed as a skin contact sensor, in particular a skin resistance sensor, and outputs a resistance value R via the line 22, which is present between two electrodes 28, 30 connected to the sensor 14 via the lines 24, 26.
  • the sensor 16 is designed as a connection sensor and outputs a signal S via the line 32, which indicates whether or not an additional device is inserted into the plug socket 36 of the mobile radio terminal 10 connected via the line 34 and what type of additional device it is it is, for example, a hands-free device, a data transmission cable, a charger or the like.
  • the sensor 18 is designed as a transmission type detection sensor and outputs a signal T via the line 38, which indicates the transmission mode in which the mobile radio terminal is currently located.
  • the signal T indicates whether the mobile radio terminal is in a normal voice telephony mode or whether other types of data are being exchanged via possibly higher-rate transmission methods, such as HSCSD transmission methods or GPRS transmission methods.
  • the detected operating parameters solid angle ⁇ , resistance R, connection parameter S and transmission type parameter T are transmitted via lines 20, 22, 32, 38 to a control unit 40 which is designed to evaluate the operating parameters. Furthermore, the control unit 40 is provided with a memory 42, in which comparison values for the detected operating parameters inclination angle ⁇ , resistance R, connection parameters S and transmission type parameters T are stored and can be read out.
  • the detected operating parameters are weighted differently, and it is determined by comparison with the comparison values stored in the memory unit 42 and read out therefrom, whether the mobile radio terminal 10 is operated in close proximity to the body or head of a user or whether it is operated is operated at a sufficient distance from the user or on which part of the body it is operated. If no clear assignment is possible, the user can be asked for the position via an operating menu.
  • a transmission signal amplifier 46 of a transmitting / receiving unit 48 is controlled via a line 44 in order to emit mobile radio signals 50 in the form of electromagnetic radiation via an antenna 52. If there are several antennas, the suitable transmitting antenna can also be used depending on the determined position can be selected.
  • the transmit signal amplifier 46 is regulated, so that when it has been determined on the basis of the weighted operating parameters that the mobile radio terminal 10 is operated in close proximity to the user, the transmission energy emanating from the transmission signal amplifier 46 and radiated via the antenna 52 is limited to a predetermined maximum value. This can also be communicated to the base station via the radio interface. Otherwise, if it is determined that the mobile radio terminal is operated at a sufficiently large distance from the body of the user, the transmission signal is amplified. ker 46 controlled so that it can send unlimited full power, so that a more reliable data transmission is guaranteed.
  • the transmission energy can be reliably controlled, specifically via the transmission power and the number of time slots in which transmission is carried out. If twice as many time slots are transmitted, the absorbed power is doubled.
  • the mobile radio terminal 10 it is possible, depending on the type of use of the mobile radio terminal 10, to operate it with different (averaged over time) transmission energies, so that in the event that the mobile radio terminal is operated in the immediate vicinity of the user, only low transmission energies , for example up to 0.8 watts in one time slot, whereas if the mobile radio terminal 10 is operated at a sufficient distance from a user, stronger transmission energies are allowed, for example up to 2 watts and six time slots.

Landscapes

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

Abstract

L'invention concerne un procédé de réglage de la puissance de transmission dans un terminal radiomobile (10), en particulier dans un téléphone mobile, caractérisé en ce qu'il comprend les étapes suivantes : A) détermination de l'état de fonctionnement du terminal radiomobile (10) au moyen d'au moins un paramètre de fonctionnement ( alpha , R, S, T) permettant de clore une opération à proximité immédiate d'un usager et, B) réglage de la puissance de transmission en fonction d'au moins un paramètre de fonctionnement ( alpha , R, S, T) déterminé, et en ce que la puissance de transmission est limitée à une valeur seuil prédéterminée lorsque le paramètre de fonctionnement ( alpha , R, S, T) indique que le terminal radiomobile (10) est utilisé à proximité directe d'un usager.
PCT/DE2002/001886 2001-07-25 2002-05-23 Dispositif et procede de reglage de la puissance de transmission dans un terminal radiomobile Ceased WO2003013020A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10136215.3 2001-07-25
DE10136215A DE10136215C1 (de) 2001-07-25 2001-07-25 Verfahren zum Regeln der Sendeenergie bei einem Mobilfunk.Endgerät und Mobilfunk-Endgerät

Publications (2)

Publication Number Publication Date
WO2003013020A1 true WO2003013020A1 (fr) 2003-02-13
WO2003013020A8 WO2003013020A8 (fr) 2005-05-12

Family

ID=7693038

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE2002/001886 Ceased WO2003013020A1 (fr) 2001-07-25 2002-05-23 Dispositif et procede de reglage de la puissance de transmission dans un terminal radiomobile

Country Status (2)

Country Link
DE (1) DE10136215C1 (fr)
WO (1) WO2003013020A1 (fr)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2031772A3 (fr) * 2004-04-07 2009-08-05 ATC Technologies, LLC Systèmes de verrouillage satellitaires main libres et/ou dispositifs auxiliaires pour terminaux radio et procédés associés
EP2293457A3 (fr) * 2009-08-05 2011-05-25 Shirook M. Ali Contrôle de transmission pour dispositif de communication conforme à un taux d'absorption spécifique
EP2410661A1 (fr) * 2010-07-20 2012-01-25 Research In Motion Limited Système de contrôle de la puissance de radiation et procédé pour dispositif de communication sans fil basé sur une histoire de radiation suivie
US8358615B2 (en) 2010-03-11 2013-01-22 Research In Motion Limited Modulation and coding scheme selection method for a specific absorption rate compliant communication device
US8538351B2 (en) 2010-07-20 2013-09-17 Blackberry Limited Radiation power level control system and method for a wireless communication device based on a tracked radiation history
EP2173129A3 (fr) * 2008-10-01 2013-12-18 Giesecke & Devrient GmbH Terminal mobile avec puissance variable de transmission
US8624788B2 (en) 2011-04-27 2014-01-07 Blackberry Limited Antenna assembly utilizing metal-dielectric resonant structures for specific absorption rate compliance
US8954121B2 (en) 2010-11-26 2015-02-10 Blackberry Limited Radiation pattern recognition system and method for a mobile communications device
US8995938B2 (en) 2011-11-14 2015-03-31 Blackberry Limited Radiation power level control system and method for a wireless communication device having tunable elements

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8023984B2 (en) * 2003-10-06 2011-09-20 Research In Motion Limited System and method of controlling transmit power for mobile wireless devices with multi-mode operation of antenna

Citations (3)

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Publication number Priority date Publication date Assignee Title
EP0843421A2 (fr) * 1996-11-13 1998-05-20 Nokia Mobile Phones Ltd. Système de limitation de la puissance transmise dans un moyen de communication mobile
EP1091498A1 (fr) * 1999-10-07 2001-04-11 Ascom AG Télephone portable et procedé de fonctionnement pour ce télephone
EP1109382A2 (fr) * 1999-12-17 2001-06-20 Nokia Mobile Phones Ltd. Commande d'un terminal d'un système de communication

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WO2002005443A2 (fr) * 2000-07-07 2002-01-17 Ericsson Inc. Dispositif de communication portable dont la puissance de sortie rf est plafonnee lorsque le dispositif fonctionne a proximite d'un corps humain

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0843421A2 (fr) * 1996-11-13 1998-05-20 Nokia Mobile Phones Ltd. Système de limitation de la puissance transmise dans un moyen de communication mobile
EP1091498A1 (fr) * 1999-10-07 2001-04-11 Ascom AG Télephone portable et procedé de fonctionnement pour ce télephone
EP1109382A2 (fr) * 1999-12-17 2001-06-20 Nokia Mobile Phones Ltd. Commande d'un terminal d'un système de communication

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2031773A3 (fr) * 2004-04-07 2009-08-05 ATC Technologies, LLC Systèmes de verrouillage satellitaires main libres et/ou dispositifs auxiliaires pour terminaux radio et procédés associés
EP2034627A3 (fr) * 2004-04-07 2009-08-12 ATC Technologies, LLC Systèmes de verrouillage satellitaires main libres et/ou dispositifs auxiliaires pour terminaux radio et procédés associés
US7606590B2 (en) 2004-04-07 2009-10-20 Atc Technologies, Llc Satellite/hands-free interlock systems and/or companion devices for radioterminals and related methods
US8014815B2 (en) 2004-04-07 2011-09-06 Atc Technologies, Llc Radioterminals including satellite interlocks and related methods
US8050674B2 (en) 2004-04-07 2011-11-01 Atc Technologies, Llc Radioterminals including satellite/hands-free interlocks and related methods
EP2031772A3 (fr) * 2004-04-07 2009-08-05 ATC Technologies, LLC Systèmes de verrouillage satellitaires main libres et/ou dispositifs auxiliaires pour terminaux radio et procédés associés
EP2173129A3 (fr) * 2008-10-01 2013-12-18 Giesecke & Devrient GmbH Terminal mobile avec puissance variable de transmission
EP2293457A3 (fr) * 2009-08-05 2011-05-25 Shirook M. Ali Contrôle de transmission pour dispositif de communication conforme à un taux d'absorption spécifique
US8798662B2 (en) 2009-08-05 2014-08-05 Blackberry Limited Transmission control for a specific absorption rate compliant communication device
US8358615B2 (en) 2010-03-11 2013-01-22 Research In Motion Limited Modulation and coding scheme selection method for a specific absorption rate compliant communication device
US9049701B2 (en) 2010-03-11 2015-06-02 Blackberry Limited Modulation and coding scheme selection method for a specific absorption rate compliant communication device
US8538351B2 (en) 2010-07-20 2013-09-17 Blackberry Limited Radiation power level control system and method for a wireless communication device based on a tracked radiation history
US8774853B2 (en) 2010-07-20 2014-07-08 Blackberry Limited Radiation power level control system and method for a wireless communication device based on a tracked radiation history
EP2410661A1 (fr) * 2010-07-20 2012-01-25 Research In Motion Limited Système de contrôle de la puissance de radiation et procédé pour dispositif de communication sans fil basé sur une histoire de radiation suivie
US9054780B2 (en) 2010-07-20 2015-06-09 Blackberry Limited Radiation power level control system and method for a wireless communication device based on a tracked radiation history
US8954121B2 (en) 2010-11-26 2015-02-10 Blackberry Limited Radiation pattern recognition system and method for a mobile communications device
US8624788B2 (en) 2011-04-27 2014-01-07 Blackberry Limited Antenna assembly utilizing metal-dielectric resonant structures for specific absorption rate compliance
US8995938B2 (en) 2011-11-14 2015-03-31 Blackberry Limited Radiation power level control system and method for a wireless communication device having tunable elements

Also Published As

Publication number Publication date
WO2003013020A8 (fr) 2005-05-12
DE10136215C1 (de) 2003-02-13

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