WO2001015474A1 - Mobile radio terminal - Google Patents

Mobile radio terminal Download PDF

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Publication number
WO2001015474A1
WO2001015474A1 PCT/DE2000/002849 DE0002849W WO0115474A1 WO 2001015474 A1 WO2001015474 A1 WO 2001015474A1 DE 0002849 W DE0002849 W DE 0002849W WO 0115474 A1 WO0115474 A1 WO 0115474A1
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WO
WIPO (PCT)
Prior art keywords
data
mobile radio
serial interface
interface
radio terminal
Prior art date
Application number
PCT/DE2000/002849
Other languages
German (de)
French (fr)
Inventor
Ulrich Barner
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 WO2001015474A1 publication Critical patent/WO2001015474A1/en

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/72—Mobile telephones; Cordless telephones, i.e. devices for establishing wireless links to base stations without route selection
    • H04M1/725—Cordless telephones
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W92/00—Interfaces specially adapted for wireless communication networks
    • H04W92/04—Interfaces between hierarchically different network devices
    • H04W92/08—Interfaces between hierarchically different network devices between user and terminal device

Definitions

  • the invention relates to mobile radio terminals, in particular mobile radio telephones or portable computers with built-in radio.
  • Such known and different interfaces use, for example, an RS-232 PC interface protocol, but with different signal levels than a PC.
  • the baud rates provided by the mobile phone are often incompatible with the baud rates intended for PCs.
  • serial interface in a car, for example, by other electronic devices, such as the alternator or the ignition of a large one electromagnetic interference is exposed, many measures have experience dictate to the transmission of data via the interface ⁇ ask to ensure reliable.
  • cell phones have a socket that can be used to charge a battery in the cell phone.
  • data transmission and charging are carried out using a combination connector. Realization variants of such combination plug-in connections known to date are, however, designed in a very complex manner, which prevents further miniaturization of mobile telephones, as is often desired.
  • the invention is therefore based on the object of specifying a mobile radio terminal that can be connected to peripheral devices on the one hand in a robust manner against external influences and with great practicality, and on the other hand can be reliably supplied with power.
  • a mobile radio terminal which can transmit data via a radio interface is provided with a serial interface which is implemented by means of a plug connector, the power supply for the mobile radio terminal also being able to be carried out via the same plug connector; for the transmission of the data via the serial interface, the signaling voltage is between 3 and 4 volts, the data transmitted via the serial interface being coded by a non-return-to-zero-inverted coding.
  • FIG. 1 represents the basic circuit diagram of a mobile radio terminal.
  • the figure shows a radio station, in particular a mobile radio terminal MS, consisting of an operating unit MMI, a control device STE, a processing device VE, a power supply device SVE, a receiving device EE and a transmitting device SE.
  • a radio station in particular a mobile radio terminal MS, consisting of an operating unit MMI, a control device STE, a processing device VE, a power supply device SVE, a receiving device EE and a transmitting device SE.
  • the control device STE essentially consists of a program-controlled microcontroller MC, which has write and read access to memory modules SPE.
  • the microcontroller MC controls and monitors all essential elements and functions of the radio station, essentially controls the communication and signaling process, responds to keyboard inputs by executing the corresponding control procedures executes and is also responsible for the relocation of the device in different operating states.
  • the control device STE also controls the serial interface SS. Furthermore, the conversion of data received via a radio interface to data to be sent via a serial interface, and the conversion of data received via a serial interface to data to be sent via a radio interface, and corresponding protocol adaptations are implemented by the control device STE.
  • the processing device VE can also be formed by a digital signal processor DSP, which can also access memory modules SPE.
  • DSP digital signal processor
  • SPE are the program data that are required to control the radio station and the communication sequence, in particular also the signaling procedures, device information, information entered by the user and information generated during the processing of signals.
  • data received or to be sent via a serial interface can be temporarily stored in the memory modules SPE.
  • the essential elements of the radio station are supplied with power by means of the power supply device SVE, which can be provided with rechargeable batteries.
  • the individual elements of the radio station are also connected to one another by conductor tracks, cables or bus systems.
  • the power supply or recharging of the batteries takes place via a conductive plug connection SS.
  • data or control signals can be transmitted from and to the radio station MS via the plug connection SS.
  • the serial interface and the power supply can be realized by a plug connection SS containing at least four connection elements and a cable which contains four mutually insulated conductors, two of which are used for voltage supply G, + 5V, and two X +, X- for data transmission via the serial interface can be used; the signaling voltage for the transmission of data via the serial interface SS is between 3 and 4 volts.
  • the data transmitted via the serial interface SS are by a non-return-to-zero inverted (NRZI) -
  • Coding encoded This is a coding method in which a logical "zero" leads to a polarity change on the interface. A logical "one”, however, leaves the level unchanged.
  • so-called 'bit stuffing' is used, according to which, for example, a "zero” is transmitted regularly after six “ones”; the knowledge of this is used on the receiving side for synchromization purposes.
  • a further development of the invention provides that the invention is a symmetrical interface.
  • the level is not related to ground.
  • the main advantage of a symmetrical interface is its high immunity to interference if the level is determined on the receiving side by forming a difference (operational amplifier), and so the interference does not come into play.
  • an embodiment variant provides that the voltage supply is carried out with a voltage which is between 4.5 volts and 5.5 volts.

Abstract

The invention relates to a mobile radio terminal in which the power supply device and the serial port are configured as one plug-in connector. The data transmitted via the serial port are encoded by Non-Return-To-Zero-Inverted coding.

Description

Beschreibungdescription
Mobilfun endgeratMobilfun terminal
Die Erfindung betrifft Mobilfunkendgerate, insbesondere Mo- bilfunktelefone oder tragbare Computer mit eingebautem Funkgerat .The invention relates to mobile radio terminals, in particular mobile radio telephones or portable computers with built-in radio.
Herkömmliche Mobiltelefone besitzen in der Regel eine Schnittstelle zur Übertragung von Daten zu bzw. von Peripheriegeraten.Conventional mobile phones usually have an interface for the transmission of data to or from peripheral devices.
Bisher wurden für die verschiedenen Gerate, an die ein Mobil- telefon anschließbar sein soll, unterschiedliche Schnittstel- len verwendet: zur Fernsteuerung des Mobilfunktelefons im Produktionspro- zess, beispielsweise zum Booten von Testsoftware oder zur Übermittlung von Meßwerten; zur Ansteuerung von eigens über das Mobilfunktelefon vor- gesehenes Zubehör, beispielsweise Freisprecheinrichtung oder Datenadapter; zum Booten von Software-Updates durch autorisierte Handler.So far, different interfaces have been used for the various devices to which a cell phone should be connectable: for remote control of the cell phone in the production process, for example for booting test software or for transmitting measured values; for controlling accessories provided specifically via the mobile radio telephone, for example a hands-free device or data adapter; for booting software updates by authorized handlers.
Derartige bekannte und unterschiedliche Schnittstellen verwenden beispielsweise ein RS-232-PC-Schnιttstellenprotokoll, allerdings mit anderen Signalpegeln als ein PC. Außerdem sind die Baud-Raten, die das Mobiltelefon liefert, zu den Baud- Raten, die für PCs vorgesehen sind häufig inkompatibel.Such known and different interfaces use, for example, an RS-232 PC interface protocol, but with different signal levels than a PC. In addition, the baud rates provided by the mobile phone are often incompatible with the baud rates intended for PCs.
Ferner sind für das Mobilfunktelefon aufwendige Maßnahmen notig, um einer ESD (electro-static discharge, Funkenuber- schlag) -Gefahr am Stecker zu begegnen.Furthermore, complex measures are necessary for the mobile radio telephone in order to counter an ESD (electro-static discharge, sparkover) risk on the plug.
Da die Verwendung der seriellen Schnittstelle beispielsweise m einem Auto durch andere elektronische Gerate, wie beispielsweise der Lichtmaschine oder der Zündung einer großen elektromagnetischen Störung ausgesetzt ist, sind viele Maßnahmen notig um die Übertragung von Daten über die Schnitt¬ stelle zuverlässig zu gewährleisten.Because the use of the serial interface in a car, for example, by other electronic devices, such as the alternator or the ignition of a large one electromagnetic interference is exposed, many measures have experience dictate to the transmission of data via the interface ¬ ask to ensure reliable.
Außerdem verfugen Mobiltelefone über eine Steckbuchse, mit der das Laden eines sich im Mobiltelefon befindlichen Akkus realisiert werden kann. Bei neueren Mobiltelefonen wird die Datenübertragung und der Ladevorgang mittels einer Kombmati- onssteckverbmdung realisiert. Bisher bekannte Realisierungs- Varianten derartiger Kombinationssteckverbindungen sind jedoch sehr aufwendig gestaltet, was einer weiteren Miniaturi- sierung von Mobiltelefonen, wie sie häufig gewünscht wird, entgegensteht .In addition, cell phones have a socket that can be used to charge a battery in the cell phone. In newer mobile phones, data transmission and charging are carried out using a combination connector. Realization variants of such combination plug-in connections known to date are, however, designed in a very complex manner, which prevents further miniaturization of mobile telephones, as is often desired.
Der Erfindung liegt daher die Aufgabe zugrunde, ein Mobilfunkendgerat anzugeben, daß über eine Steckverbindung einerseits robust gegen äußere Einflüsse und mit großer Praktikabilitat an Peripheriegerate angeschlossen werden kann und andererseits zuverlässig mit Strom versorgt werden kann.The invention is therefore based on the object of specifying a mobile radio terminal that can be connected to peripheral devices on the one hand in a robust manner against external influences and with great practicality, and on the other hand can be reliably supplied with power.
Diese Aufgabe wird erfmdungsgemaß durch die Merkmale des Anspruchs 1 gelost. Vorteilhafte Weiterbildungen ergeben sich aus den abhangigen Ansprüchen.This object is achieved according to the invention by the features of claim 1. Advantageous further developments result from the dependent claims.
Erfmdungsgemaß wird ein Mobilfunkendgerat, das Daten über eine Funkschnittstelle übertragen kann, mit einer seriellen Schnittstelle versehen, die mittels eines Steckverbinders realisiert wird, wobei über denselben Steckverbinder auch die Spannungsversorgung des Mobilfunkendgerates durchfuhrbar ist; zur Übertragung der Daten über die serielle Schnittstelle liegt die Signalisierungsspannung zwischen 3 und 4 Volt, wobei die über die serielle Schnittstelle übertragenen Daten durch eine Non-Return-To-Zero-Inverted-Codierung codiert sind.According to the invention, a mobile radio terminal which can transmit data via a radio interface is provided with a serial interface which is implemented by means of a plug connector, the power supply for the mobile radio terminal also being able to be carried out via the same plug connector; for the transmission of the data via the serial interface, the signaling voltage is between 3 and 4 volts, the data transmitted via the serial interface being coded by a non-return-to-zero-inverted coding.
Umfangreiche Experimente und Untersuchungen ergaben, daß genau durch die oben beschriebenen Parameter einerseits eine zuverlässige und praktikable Übertragung von Daten und andererseits eme zuverlässige aufwandsgunstige Spannungsversorgung möglich ist, die einer weiteren Miniaturisierung von Mo- bilfunkendgeraten entgegen kommt; bei diesen Untersuchungen wurde außerdem berücksichtigt, daß das Mobilfunktelefon Funksignale im Gigaherzbereich übertragt.Extensive experiments and investigations have shown that the parameters described above on the one hand result in a reliable and practicable transmission of data and, on the other hand, a reliable, inexpensive power supply is possible, which accommodates further miniaturization of mobile radio terminals; these investigations also took into account the fact that the cell phone transmits radio signals in the gigahertz range.
Ferner stellte sich heraus, daß es auf der Basis dieser Losung einfach möglich ist, eme zu PCs kompatible Schnittstelle zu realisieren, und dadurch die weitverbreiteten PC- Peπpheriegerate nutzen zu können.It also turned out that on the basis of this solution it is easily possible to implement an interface compatible with PCs, and thus to be able to use the widespread PC peripheral rate.
Vorteilhafte Weiterbildungen der Erfindung ergaben sich aus umfangreichen Untersuchungen mit dem Ziel, eine serielle Schnittstelle zu entwickeln, die auch m elektromagnetisch gestörten Umgebungen eine zuverlässige Datenübertragung ermöglicht, bei gleichzeitig effizient durchfuhrbarer Spannungsversorgung des Mobilfunktelefons .Advantageous further developments of the invention have resulted from extensive investigations with the aim of developing a serial interface that enables reliable data transmission even in electromagnetically disturbed environments, while at the same time efficiently supplying power to the mobile radio telephone.
Die Erfindung wird im folgenden anhand bevorzugter Ausfuh- rungsbeispiele naher beschrieben, zu deren Erläuterung die Figur 1 dient, die das Prmzipschaltbild eines Mobilfunkend- gerates darstellt.The invention is described in more detail below with the aid of preferred exemplary embodiments, for the explanation of which FIG. 1 is used, which represents the basic circuit diagram of a mobile radio terminal.
Die Figur zeigt eme Funkstation, insbesondere ein Mobilfunkendgerat MS, bestehend aus einer Bedieneinheit MMI, einer Steuereinrichtung STE, einer Verarbeitungseinrichtung VE, einer Stromversorgungseinrichtung SVE, einer Empfangseinrichtung EE und einer Sendeeinrichtung SE.The figure shows a radio station, in particular a mobile radio terminal MS, consisting of an operating unit MMI, a control device STE, a processing device VE, a power supply device SVE, a receiving device EE and a transmitting device SE.
Die Steuereinrichtung STE besteht im wesentlichen aus einem programmgesteuerten Mikrocontroler MC, der schreibend und lesend auf Speicherbausteine SPE zugreifen kann. Der Microcon- troler MC steuert und kontrolliert alle wesentlichen Elemente und Funktionen der Funkstation, steuert im wesentlichen den Kommunikations- und Signalisierungsablauf, reagiert auf Tastatureingaben, indem er die entsprechenden Steuerprozeduren ausfuhrt und ist auch für die Versetzung des Gerätes m unterschiedlich Betriebzustande zustandig. Die Steuereinrichtung STE steuert außerdem die serielle Schnittstelle SS an. Ferner wird das Umsetzen von über eme Funkschnittstelle empfangenen Daten auf über eine serielle Schnittstelle zu sendende Daten, und das Umsetzen von über eme serielle Schnittstelle empfangenen Daten auf über eine Funkschnittstelle zu sendende Daten und entsprechende Protokollanpassungen durch die Steuereinrichtung STE realisiert.The control device STE essentially consists of a program-controlled microcontroller MC, which has write and read access to memory modules SPE. The microcontroller MC controls and monitors all essential elements and functions of the radio station, essentially controls the communication and signaling process, responds to keyboard inputs by executing the corresponding control procedures executes and is also responsible for the relocation of the device in different operating states. The control device STE also controls the serial interface SS. Furthermore, the conversion of data received via a radio interface to data to be sent via a serial interface, and the conversion of data received via a serial interface to data to be sent via a radio interface, and corresponding protocol adaptations are implemented by the control device STE.
Die Verarbeitungseinrichtung VE kann auch durch einen digitalen Signalprozessor DSP gebildet sein, der ebenfalls auf Speicherbausteine SPE zugreifen kann.The processing device VE can also be formed by a digital signal processor DSP, which can also access memory modules SPE.
In den fluchtigen oder nicht fluchtigen SpeicherbausteinenIn the volatile or non-volatile memory modules
SPE sind die Programmdaten, die zur Steuerung der Funkstation und des Kommunikationsabiaufs, insbesondere auch der Signali- sierungsprozeduren, benotigt werden, Gerateinformationen, vom Benutzer eingegebene Informationen und wahrend der Verarbei- tung von Signalen entstehende Informationen gespeichert. Außerdem können über eme serielle Schittstelle empfangene oder zu sendende Daten den Speicherbausteinen SPE zwischenge- speichert werden.SPE are the program data that are required to control the radio station and the communication sequence, in particular also the signaling procedures, device information, information entered by the user and information generated during the processing of signals. In addition, data received or to be sent via a serial interface can be temporarily stored in the memory modules SPE.
Mittels der Stromversorgungseinrichtung SVE, die mit Akkus versehen sein kann, werden die wesentlichen Elemente der Funkstation mit Strom versorgt.The essential elements of the radio station are supplied with power by means of the power supply device SVE, which can be provided with rechargeable batteries.
Die einzelnen Elemente der Funkstation sind auch durch Lei- terbahnen, Kabel oder Bussysteme miteinander verbunden.The individual elements of the radio station are also connected to one another by conductor tracks, cables or bus systems.
Über eme leitende Steckverbindung SS erfolgt die Stromversorgung oder das Nachladen der Akkus. Außerdem können über die Steckverbindung SS Daten oder Steuersignale von und zu der Funkstation MS übertragen werden. Die serielle Schnittstelle und die Spannungsversorgung ist durch eine zumindest vier Anschlußelemente enthaltende Steckverbindung SS und ein Kabel realisierbar, das vier voneinander isolierte Leiter enthält, von denen zwei zur Spannungs- Versorgung G, +5V verwendet werden, und zwei X+, X- zur Datenübertragung über die serielle Schnittstelle verwendet werden; dabei liegt die Signalisierungsspannung zur Übertragung der Daten über die serielle Schnittstelle SS zwischen 3 und 4 Volt. Die über die serielle Schnittstelle SS übertragenen Da- ten sind durch eine Non-Return-To-Zero-Inverted (NRZI) -The power supply or recharging of the batteries takes place via a conductive plug connection SS. In addition, data or control signals can be transmitted from and to the radio station MS via the plug connection SS. The serial interface and the power supply can be realized by a plug connection SS containing at least four connection elements and a cable which contains four mutually insulated conductors, two of which are used for voltage supply G, + 5V, and two X +, X- for data transmission via the serial interface can be used; the signaling voltage for the transmission of data via the serial interface SS is between 3 and 4 volts. The data transmitted via the serial interface SS are by a non-return-to-zero inverted (NRZI) -
Codierung codiert. Dabei handelt es sich um ein Codierungsverfahren, bei dem eine logische "Null" zum Polaritätswechsel auf der Schnittstelle führt. Eine logische "Eins" läßt den Pegel dagegen unverändert. Zusätzlich wird ein sog. ' Bit- Stuffing' angewendet, gemäß welchem beispielsweise regelmäßig nach sechs "Einsen" eine "Null" übertragen wird; die Kenntnis darüber macht man sich empfangsseitig zu Synchromisierungs- zwecken zu Nutze.Coding encoded. This is a coding method in which a logical "zero" leads to a polarity change on the interface. A logical "one", however, leaves the level unchanged. In addition, so-called 'bit stuffing' is used, according to which, for example, a "zero" is transmitted regularly after six "ones"; the knowledge of this is used on the receiving side for synchromization purposes.
Eine Weiterbildung der Erfindung sieht vor, daß es sich bei der Erfindung um eine symmetrische Schnittstelle handelt. Dabei ist der Pegel nicht massebezogen. Der Vorteil einer symmetrischen Schnittstelle liegt vor allem in ihrer großen Störfestigkeit, wenn empfangsseitig der Pegel durch Diffe- renzbildung (Operationsverstärker) ermittelt wird, und so die Störung nicht zum Tragen kommt.A further development of the invention provides that the invention is a symmetrical interface. The level is not related to ground. The main advantage of a symmetrical interface is its high immunity to interference if the level is determined on the receiving side by forming a difference (operational amplifier), and so the interference does not come into play.
Ferner sieht eine Ausführungsvariante vor, daß die Spannungsversorgung mit einer Spannung, die zwischen 4,5 Volt und 5,5 Volt liegt, erfolgt. Furthermore, an embodiment variant provides that the voltage supply is carried out with a voltage which is between 4.5 volts and 5.5 volts.

Claims

Patentansprüche claims
1. Mobilfunkendgerat (MS), mit1. Mobile radio terminal (MS), with
-Mitteln (EE, SE) zum Übertragen von Daten über eine Funk- schnittsteile,Means (EE, SE) for transmitting data via a radio interface,
-Mitteln (STE) zum Senden und/oder Empfang von Daten über eine serielle Schnittstelle (SS)Means (STE) for sending and / or receiving data via a serial interface (SS)
-an das über eine Steckverbindung (SS) ein Kabel anschließbar ist, das vier voneinander isolierte Leiter enthält, von denen-to which a cable can be connected via a plug connection (SS), which contains four conductors insulated from one another, one of which
-zwei (G, +5V) zur Spannungsversorgung verwendbar sind, -zwei (X+, X-) zur Datenübertragung über die serielle Schnittstelle (SS) verwendbar sind, wobei die Signalisie- rungsspannung zur Übertragung der Daten über die serielle Schnittstelle (SS) zwischen 3 und 4 Volt liegt, und die über die serielle Schnittstelle (SS) übertragenen Daten durch eine Non-Return-To-Zero-Inverted-Codierung codiert sind.-two (G, + 5V) can be used for power supply, -two (X +, X-) can be used for data transmission via the serial interface (SS), the signaling voltage for transmission of the data via the serial interface (SS) between 3 and 4 volts, and the data transmitted via the serial interface (SS) are encoded by a non-return-to-zero-inverted coding.
2. Mobilfunkendgerat nach Anspruch 1 mit bei dem es sich bei der seriellen Schnittstelle um eine symmetrische Schnittstelle handelt.2. Mobile radio terminal according to claim 1, wherein the serial interface is a symmetrical interface.
3. Mobilfunkendgerat nach einem vorstehenden Anspruch,3. mobile radio terminal according to any preceding claim,
- bei dem die Spannungsversorgung mit einer Spannung, die zwischen 4,5 Volt und 5,5 Volt liegt, erfolgt.- In which the voltage supply is carried out with a voltage that is between 4.5 volts and 5.5 volts.
4. Mobilfunkendgerat nach einem vorstehenden Anspruch, -Mitteln (SPE) zum Zwischenspeichern von Daten.4. Mobile radio terminal according to one of the preceding claims, means (SPE) for temporarily storing data.
5. Mobilfunkendgerat nach einem vorstehenden Anspruch,5. mobile radio terminal according to any preceding claim,
-Mitteln (STE) zum Umsetzen von über eine Funkschnittstelle empfangenen Daten auf über eine serielle Schnittstelle zu sendende Daten und -Mitteln (STE) zum Umsetzen von über eine serielle Schnitt- stelle empfangenen Daten auf über eine Funkschnittstelle zu sendende Daten. -Means (STE) for converting data received via a radio interface to data to be sent via a serial interface and -Means (STE) for converting data received via a serial interface to data to be sent via a radio interface.
PCT/DE2000/002849 1999-08-23 2000-08-21 Mobile radio terminal WO2001015474A1 (en)

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DE19939862A DE19939862A1 (en) 1999-08-23 1999-08-23 Mobile terminal
DE19939862.3 1999-08-23

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EP1150525A2 (en) * 2000-04-25 2001-10-31 Kabushiki Kaisha Toshiba Mobile communication terminal device
DE10153747A1 (en) * 2001-10-31 2003-05-28 Siemens Ag Mobile end device and communication system with integrated mobile end device

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Publication number Priority date Publication date Assignee Title
FR2835139B1 (en) * 2002-01-22 2004-06-11 Innovi Technologies Ltd METHOD FOR TRANSMITTING VOICE / DATA SIGNALS BETWEEN A BASIC DEVICE AND A SECONDARY OR INTERMEDIATE DEVICE

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DE4323144A1 (en) * 1993-07-10 1995-01-19 Diehl Gmbh & Co Wireless information transmission system
WO1999008456A1 (en) * 1997-08-06 1999-02-18 Comsys Communication & Signal Processing Ltd. Communication system utilizing host signal processing
US5884086A (en) * 1997-04-15 1999-03-16 International Business Machines Corporation System and method for voltage switching to supply various voltages and power levels to a peripheral device

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Publication number Priority date Publication date Assignee Title
DE4323144A1 (en) * 1993-07-10 1995-01-19 Diehl Gmbh & Co Wireless information transmission system
US5884086A (en) * 1997-04-15 1999-03-16 International Business Machines Corporation System and method for voltage switching to supply various voltages and power levels to a peripheral device
WO1999008456A1 (en) * 1997-08-06 1999-02-18 Comsys Communication & Signal Processing Ltd. Communication system utilizing host signal processing

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1150525A2 (en) * 2000-04-25 2001-10-31 Kabushiki Kaisha Toshiba Mobile communication terminal device
EP1150525B1 (en) * 2000-04-25 2008-12-31 Kabushiki Kaisha Toshiba Mobile communication terminal device
DE10153747A1 (en) * 2001-10-31 2003-05-28 Siemens Ag Mobile end device and communication system with integrated mobile end device
US7515936B2 (en) 2001-10-31 2009-04-07 Siemens Aktiengesellschaft Mobile terminal device alone and in communication system

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