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WO2009053873A1 - Dispositif de communications mobiles et procédé pour effectuer des conférences téléphoniques - Google Patents

Dispositif de communications mobiles et procédé pour effectuer des conférences téléphoniques Download PDF

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Publication number
WO2009053873A1
WO2009053873A1 PCT/IB2008/054262 IB2008054262W WO2009053873A1 WO 2009053873 A1 WO2009053873 A1 WO 2009053873A1 IB 2008054262 W IB2008054262 W IB 2008054262W WO 2009053873 A1 WO2009053873 A1 WO 2009053873A1
Authority
WO
WIPO (PCT)
Prior art keywords
transceiver module
output signal
signal
communication device
module
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/IB2008/054262
Other languages
English (en)
Inventor
Zahra Tabaaloute
David Tarrant
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.)
ST Ericsson SA
Original Assignee
ST Wireless SA
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 ST Wireless SA filed Critical ST Wireless SA
Publication of WO2009053873A1 publication Critical patent/WO2009053873A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/60—Substation equipment, e.g. for use by subscribers including speech amplifiers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/60—Substation equipment, e.g. for use by subscribers including speech amplifiers
    • H04M1/6033—Substation equipment, e.g. for use by subscribers including speech amplifiers for providing handsfree use or a loudspeaker mode in telephone sets
    • H04M1/6041—Portable telephones adapted for handsfree use
    • H04M1/6058—Portable telephones adapted for handsfree use involving the use of a headset accessory device connected to the portable telephone
    • H04M1/6066—Portable telephones adapted for handsfree use involving the use of a headset accessory device connected to the portable telephone including a wireless connection
    • 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
    • H04M1/724—User interfaces specially adapted for cordless or mobile telephones
    • H04M1/72403—User interfaces specially adapted for cordless or mobile telephones with means for local support of applications that increase the functionality
    • 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
    • H04M1/733—Cordless telephones with a plurality of base stations connected to a plurality of lines
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M2250/00—Details of telephonic subscriber devices
    • H04M2250/02—Details of telephonic subscriber devices including a Bluetooth interface
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M2250/00—Details of telephonic subscriber devices
    • H04M2250/62—Details of telephonic subscriber devices user interface aspects of conference calls

Definitions

  • the present invention is generally directed to a communication device, and more specifically to a mobile communication device that enables a plurality of users to concurrently make and receive calls and originate and relay conference calls to one or more third parties.
  • a communication device includes a handset having a plurality of transceiver modules and a mixing module coupled to the transceiver modules. Each transceiver module incorporates a separate identity module for identifying the device on the network. Through a single device, one user may make calls in the analog domain, for example, using the microphone and speaker on the mobile handset, and another user may concurrently or separately in time make calls in the digital domain, for example, through a digital headset coupled to the device via a local digital transceiver.
  • the communication device includes a mixing module for mixing the signals transmitted and received to and from the first and second transceiver modules.
  • a conference call may be held with multiple third parties using only the handsets without the need for a separate conference call number or passcode.
  • a mobile communication device in one exemplary embodiment according to the present invention, includes a first transceiver module for conducting a first telephone call in a first mobile network, wherein the first transceiver module outputs a first output signal associated with the first telephone call; a second transceiver module for conducting a second telephone call in a second mobile network, wherein the second transceiver module outputs a second output signal associated with the second telephone call; a digital interface coupled to at least one of the first transceiver module or the second transceiver module, wherein the digital interface is adapted for transmitting digital signals to a communication accessory; a microphone and a speaker coupled to at least one of the first transceiver module or the second transceiver module; and a mixing module coupled to the first transceiver module and the second transceiver module for selectively combining the first output signal and the second output signal.
  • a method for carrying out a conference call using a mobile communication device includes a first transceiver module, a second transceiver module and a mixing module coupled to the first transceiver module and the second transceiver module.
  • the method includes establishing, via the first transceiver module, a first telephone call in a mobile network, the first transceiver module outputting a first reception signal corresponding to the first telephone call; establishing, via the second transceiver module, a second telephone call in a mobile network, the second transceiver module outputting a second reception signal corresponding to the second telephone call; and combining, via the mixing module, the first reception signal and the second reception signal into a combined reception signal and outputting the combined reception signal to a user.
  • a communication device for a mobile network includes: a first transceiver module for conducting a first telephone call in the mobile network, wherein the first transceiver module is adapted to receive a first input signal and to output a first output signal associated with the first telephone call; a second transceiver module for conducting a second telephone call in the mobile network, wherein the second transceiver module is adapted to receive a second input signal and to output a second output signal associated with the second telephone call; a user interface adapted to receive an audible input signal from a user and to output an audible output signal to the user, wherein the user interface is adapted to generate an electrical input signal using the audible input signal and to generate the audible output signal using an electrical output signal; and a mixing module coupled to the first transceiver module, the second transceiver module and the user interface, and adapted to selectively combine the electrical input signal with the first output signal to generate the second input signal, to selective
  • FIG. 1 illustrates a mobile communication device according to an exemplary embodiment of the present invention
  • FIG. 2 is a schematic drawing of the communication device of FIG. 1, showing two transceiver modules, an analog mixing module, a digital mixing module and a local digital interface module;
  • FIG. 3 is a schematic drawing of an exemplary embodiment of the analog mixing module;
  • FIG. 4 is a schematic drawing of an exemplary embodiment of the digital mixing module;
  • FIG. 5 illustrates an arrangement of multiple users carrying out a conference call using the communication device;
  • FIG. 6 illustrates exemplary signal flow when carrying out two separate calls with the communication device
  • FIG. 7 is a schematic drawing of a generalized embodiment of the communication device including a high-speed processor for mixing, and multiple digital interface modules and transceiver modules.
  • a mobile communication device e.g., a mobile telephone
  • the mobile communication device includes at least two transceiver modules (e.g., GSM modules), each having at least one subscriber identity module (SIM) card, to allow making two separate calls concurrently.
  • the mobile communication device enables a user to establish a three-party conference call by calling a second person while already in conversation with a first one.
  • the mobile communication device allows two separate users to make two separate calls to different parties.
  • one user may make the call in the analog domain using the speaker and microphone on the mobile communication device, while another user concurrently makes the call in the digital domain using a local digital interface that communicates with a wireless headset (e.g., a Bluetooth headset).
  • a wireless headset e.g., a Bluetooth headset
  • the mobile communication device includes a plurality of transceiver modules (e.g., GSM modules including respective SIM cards) and a plurality of digital wireless interface modules (e.g., Bluetooth modules) coupled to a data bus (e.g., a PCM bus) and sharing the bus.
  • the data bus is controlled by a processor (e.g., high-speed processor) that is used for mixing (e.g., PCM mixing) the input/output signals of the transceiver modules.
  • the processor operates as a master, and the transceiver modules and the digital wireless interface modules operate as slaves on the data bus.
  • a mobile communication device 10 includes a handset 12 including a first antenna 14 for transmission and reception of signals within the mobile network, a second antenna 16 for transmission and reception of telephone signals within the same or a different mobile network, a typically analog microphone 18 and speaker 20 for communicating directly through the handset 12, and a local digital interface 22, such as, for example, a Bluetooth transceiver, for wireless communication via an antenna 24 to a digital accessory 26, such as a Bluetooth enabled headset.
  • the digital accessory 26 may also be referred to herein as a headset or a Bluetooth headset.
  • the mobile device further includes a processor 28 for controlling the operation of the mobile telephone device 10.
  • the mobile device may be configured as a mobile telephone, a standalone device operating over a mobile network, or any other device with a combination of voice communication capability and any other feature, such as a PDA, MP3 player, portable Internet device, digital camera or any other accessory.
  • the analog microphone and speaker may be incorporated into an earpiece connected to a conventional jack on the handset or any other suitable accessory and the digital transceiver and accessory may be configured to employ other standards such as WIFI, DVB-H (Digital Video Broadcasting - Handheld), NFC (Near Field Communication) or any other suitable standard.
  • the communication device includes a first transceiver module 30, a second transceiver module 32 and a mixing module 34, which may also be referred to as a multiplexing module.
  • the first transceiver module 30 is coupled to the first antenna 14 and the second transceiver module 32 is coupled to the second antenna 16.
  • a first user initiates, receives and relays calls through the mixing module 34 and the analog microphone 18 and speaker 20 together with the first transceiver module 30 and the first antenna 14.
  • the first user may use features typically available on the handset, such as, for example, the numeric keypad, contact list and lists of dialed, received and missed calls.
  • a second user initiates, receives and relays calls through the digital accessory 26 (e.g., Bluetooth headset) together with the second transceiver module 32.
  • the headset in one embodiment includes a display and dialing capability for accessing and dialing numbers.
  • the display on the headset may allow browsing the address book and selecting a new number to dial. This capability provides a flexibility to operate the mobile communication device from a distance with the headset.
  • the mixing module 34 coupled to the first and second transceiver modules 30, 32 and the local digital interface 22, enables users to initiate or relay conference calls with one another and with one or more third parties.
  • the local digital interface 22 may also be referred to as a wireless digital interface, or as a Bluetooth interface when the Bluetooth standard is used as the wireless communications protocol.
  • the processor 28 controls and coordinates the operation of the transceiver modules 30, 32, the mixing module 34, and the local digital interface 22. While the processor 28 and the mixing module 34 are illustrated as two different modules in FIG. 1, the processor 28 and the mixing module 34 may be implemented as a single integrated circuit or two or more integrated circuits. As such, the functionalities of the processor 28 and the mixing module 34 may be implemented using a single integrated circuit chip or multiple integrated circuit chips.
  • the mobile device is configured to operate on a mobile network using the GSM standard, which typically utilizes a subscriber identity module, also known as a SIM, for uniquely identifying the mobile device on the network.
  • a subscriber identity module also known as a SIM
  • the SIM may or may not be removable by the user.
  • the SIM may be implemented as a removable SIM card or as an integral part of the first transceiver module 30 or the second transceiver module 32.
  • the first transceiver module 30 includes a first SIM (or SIM card) 36
  • the second transceiver module 32 includes a second SIM (or SIM card) 38.
  • the described embodiment is discussed primarily in terms of the GSM standard, the present invention may be readily configured to operate on mobile networks using any other standard such as, for example UMTS, CDMA or TDMA.
  • one of the transceiver modules may be configured to operate on one type of network and/or with one network carrier, and the other one of the transceiver modules may be configured to operate on a different type of network and/or with a different network carrier.
  • transceiver modules, the processor, the mixing module, digital signal interface and/or other logic or circuit components are illustrated as modules or discrete components, however, one or more of these modules and/or the components may be implemented in hardware, software and/or firmware or any suitable combination thereof, in same or different integrated circuits, chips or packages, as those skilled in the art would appreciate.
  • the mixing module 34 includes an analog mixing module (i.e., analog multiplexing module) 46 and a digital mixing module (i.e., digital multiplexing module) 48.
  • the analog mixing module 46 is coupled to the first and second transceiver modules 30, 32 and the microphone 18 and speaker 20 on the handset 12 for multiplexing and transmitting signals between the microphone and speaker and the first and second transceiver modules 30, 32.
  • the digital mixing module 48 is coupled to the first and second transceiver modules 30, 32 and the local digital interface 22 through a data bus 56 for transmitting signals between the first and second transceiver modules and the local digital interface 22.
  • the data bus 56 may be configured as a time-division multiplexed pulse code modulation (PCM) bus, however, any other suitable bus may be used as those skilled in the art would appreciate.
  • PCM pulse code modulation
  • the handset 12 may also include a port or jack for plugging in a wired headset or earpiece for user interface.
  • the first transceiver module 30 is configured to output a first analog reception signal A OUTI associated with a first telephone call to the analog mixing module 46
  • the second transceiver module 32 is configured to output a second analog reception signal Aou ⁇ 2 associated with a second telephone call to the analog mixing module 46.
  • the analog mixing module 46 combines (e.g., multiplexes) the signals A OU TI, A OU T2 to form a combined analog output signal A OUT which is audibly output to the user through the speaker 20, for example.
  • the analog mixing module 46 accepts audible input signal A 1 N from the microphone 18 and splits the signal into signals AiNi and A IN2 for respective transmission through the first and second transceiver modules 30 and 32.
  • the first transceiver module 30 is further configured to output a first digital reception signal DouTi associated with a first telephone call to the digital mixing module 48
  • the second transceiver module 32 is configured to output a second digital reception signal Dou ⁇ 2 associated with a second telephone call to the digital mixing module 48.
  • the digital mixing module 48 combines (e.g., multiplexes) the signals DQ U TI, DQ U T2 to form a combined digital output signal DQ U T which is transmitted to the local digital interface 22 through the data bus 56.
  • the local digital interface 22 wirelessly transfers the combined signal to the Bluetooth-enabled headset 26, which creates an audible signal for the second user.
  • the digital mixing module also accepts an input signal D IN from the headset 26 through the local digital interface 22 and the data bus 56 and splits the signal into signals D INI and D IN2 for respective transmission through the first and second transceiver modules 30, 32.
  • the signal A OUT includes the audible content of D IN and the signal D OUT includes the audible content of A 1 N so the first and second users, one on the handset 12 and another on the Bluetooth enabled headset 26 in another room, for example, can communicate with and listen to one another during conference calls.
  • the analog mixing module 46 more particularly includes a first multiplexing element 120 coupled to the first transceiver module 30 and the second transceiver module 32.
  • the audio output signal is generated using both audio outputs from the first and second transceiver modules 30, 32, and provided to the speaker 20.
  • the first and second transceiver modules 30 and 32 include respective SIMs 36 and 38. In one embodiment, as these SIMs are based on GSM standard, they each may be referred to as a GSM module. Alternatively, the first and second transceiver modules themselves may be referred to as GSM modules.
  • audio output of the first transceiver module 30 is multiplexed with the audio input from the microphone 18, and the multiplexed audio signal is provided to the second transceiver module 32 for transmission.
  • the audio output of the second transceiver module 32 is multiplexed with the audio input from the microphone 18, and the multiplexed audio signal is provided to the first transceiver module 30 for transmission.
  • the first transceiver module 30 and the second transceiver module 32 output a first reception signal A OUTI and a second reception signal Aou ⁇ 2, respectively, to the first multiplexing element 120, which multiplexes the signals and forms a combined signal AQ UT for output to the speaker 20 on the handset.
  • a second multiplexing element 122 receives the second reception Aou ⁇ 2 and an input signal A 1 N from the microphone 18 to form a first transmission signal Ai N i for transmission by the first transceiver module 30.
  • a third multiplexing element 124 receives the first reception signal A OUTI and the input signal A 1 N from the microphone 18 and multiplexes the signals to form a second transmission signal A IN2 for transmission by the second transceiver module 32.
  • the user of the mobile communication device 10 in one embodiment is able to hold a conference call with two separate parties, one through the first transceiver module 30 and the antenna 14, and the other through the second transceiver module 32 and the antenna 16.
  • the voice input signal from the user through the microphone 18 is split and provided to the first and second transceiver modules 30, 32 after being mixed with the voice input signals from the first transceiver module 30 or the second transceiver module 32, such that each of the two parties conferencing with the user can listen to the user as well as the other one of the two parties.
  • the voice signals from the other two parties are mixed together and provided to the user through the speaker 20.
  • the digital mixing module 48 more particularly includes a first mixing element 130 connected to the first transceiver module 30 and the second transceiver module 32.
  • the digital outputs e.g., PCM outputs
  • the digital mixing module 48 also may be referred to as a high-speed processor for PCM mixing, and the digital outputs are PCM outputs.
  • the local digital interface 22 may be a Bluetooth interface.
  • the digital output (e.g., PCM output) of the first transceiver module 30 is mixed (i.e., multiplexed) with the digital input (e.g., PCM input) from the local digital interface 22 (e.g., Bluetooth interface) and provided to the second transceiver module 32.
  • the digital output (e.g., PCM output) of the second transceiver module 32 is mixed (i.e., multiplexed) with the digital input (e.g., PCM input) from the local digital interface 22 and provided to the first transceiver module 30.
  • the first transceiver module 30 and the second transceiver module 32 output a first reception signal D OUTI and a second reception signal Dou ⁇ 2, respectively, to the first mixing element 130, which mixes the signals and forms a combined signal (e.g., multiplexed signal) D OUT for output through the data bus 56 to the local digital interface module 22.
  • a second mixing element 132 receives the second reception signal Dou ⁇ 2 and an input signal D IN from the local digital interface 22 and mixes the signals to form a second transmission signal D INI for transmission by the first transceiver module 30.
  • a third mixing element 134 receives the first reception signal D OUTI and the input signal D IN from the local digital interface 22 and mixes the signals to form a second transmission signal D IN2 for transmission by the second transceiver module 32.
  • the user of the mobile communication device 10 is able to hold a conference call with two separate parties, one through the first transceiver module 30 and the antenna 14, and the other through the second transceiver module 32 and the antenna 16.
  • the voice input signal from the user through the headset 26 and the wireless digital interface 22 is split and provided to the first and second transceiver modules 30, 32 after being mixed with the voice input signals from the first transceiver module 30 or the second transceiver module 32, such that each of the two parties conferencing with the user can listen to the user as well as the other one of the two parties.
  • the voice signals from the other two parties are mixed together and provided to the user through the wireless digital interface 22 and the headset 26.
  • a conference call between three and then five different participants 102, 104, 106, 108 and 110 is shown, each participant employing a mobile communication device according to an exemplary embodiment of the present invention.
  • the first participant 102 establishes a first telephone call with the second participant 104 and a second telephone call with the third participant 106 using the two separate transceiver modules of a first mobile telephone device 10.
  • Second and third participants 104 and 106 each using a separate communication device 10 according to FIG. 2, may then each establish a further telephone call to fourth and fifth participants 108, 110, respectively, thereby adding additional participants to the conference call.
  • the second and third participants 104, 106 each use only one transceiver module of their respective mobile communication device for the telephone call with the first participant 102, they each have a second transceiver module available to establish the telephone calls with the participants 108, 110, respectively.
  • the fourth and fifth participants 108, 110 each have a second transceiver module available to place another call, a theoretically unlimited number of users may be added to a conference call in an open loop configuration. As the number of participants in the conference call increases, however, spurious effects such as voice transmission delays may become increasingly significant and should be taken into account, thereby posing a practical limit on the maximum number of participants on a conference call.
  • a new participant when a new participant desires to join in the conference call, he should know beforehand which numbers are free. In another embodiment, when a new participant dials an already taken number, the new participant may be provided with two or more spare numbers to dial in order to join the conference call. In other embodiments, a mechanism to divert calls between the SIM cards on the same mobile communication device may be implemented such that the new participant does not necessarily have to know which of the two telephone numbers are available prior to joining the conference call. In another embodiment, available numbers for creating a conference call chain may be transmitted via text messages or other data transfer.
  • the headset When the headset has a display and number selection capability or just the number selection capability, it is possible to make two separate calls from the same handset 12. Since two SIM cards (e.g., GSM modules) as well as two separate user interfaces (speaker/microphone and wireless digital interface) are available on the handset 12, one call can be routed through the analog domain using the microphone/speaker and the other through the digital domain using the wireless digital interface (e.g., Bluetooth interface).
  • SIM cards e.g., GSM modules
  • speaker/microphone and wireless digital interface two separate user interfaces
  • two separate users may engage in independent calls, separately in time or concurrently, using the same mobile communication device 10.
  • a first user engages in a first call through the headset 26 via the first transceiver module 30, and separately or concurrently in time, a second user engages in a second call via the microphone 18 and speaker 20 on the handset 12 through the second transceiver module 32.
  • signals D IN and D OUT are transmitted only between the local digital interface and the first transceiver module 30, and signals A 1 N and A OUT are transferred only between the microphone and speaker and the second transceiver module 32. While the microphone 18 and the speaker 20 are illustrated in FIG.
  • the microphone 18 and the speaker 20 are coupled to the second transceiver module 32 (and the first transceiver module 30) through the mixing module 34 (in particular, the analog mixing module 46) as illustrated in FIGs. 1, 2 and 3.
  • the mixing module 34 in particular, the analog mixing module 46
  • the microphone 18 and/or the speaker 20 may be coupled directly to the second transceiver module 32 (or to the first transceiver module 30).
  • the first user on CALL 1 uses the headset 26 (e.g., Bluetooth headset) to wirelessly communicate with the local digital interface 22 to receive the signal D IN and transmit the signal D OUT via the data bus 56.
  • the signal D IN is provided through the second mixing element 132 to the first transceiver module 30.
  • the mixing of the signals is disabled such that only the signal D IN (and not the signal Do ⁇ rc) is provided through the mixing element 132 as the signal D INI to the first transceiver module 30.
  • only the signal D OUTI is provided through the mixing element 130 as the signal D OUT to the local digital interface 22.
  • the mixing of signals is disabled such that there is no mixing between signals D IN2 and Dou ⁇ 2 (which may not necessarily be generated) to and from the second transceiver module 32 and the signals from the first transceiver module 30 or the local digital interface 22.
  • the second transceiver module 32 operates as a transceiver that allows for a communication between a second user and another party to establish CALL 2. This way, the second user on the second transceiver module 32 can communicate using the microphone 18 and the speaker 20, the second transceiver module 32 and the antenna 16 with another party on another communication device separately from the first user who uses the headset 26 and the first transceiver module 30.
  • the first and second transceiver modules 30, 32 and the local digital interface 22 are operated in different time slots while sharing the same PCM bus as slaves to the processor.
  • the number of slots in a PCM frame limits the number of slave devices that can be connected on the same PCM bus.
  • a mobile telephone device may also include more than two transceiver modules and more than one digital interface module.
  • a mobile telephone device includes n transceiver modules 20Oi ••• 20O n and m digital interface modules 300i ••• 300 m .
  • the transceiver modules 20Oi ••• 20O n are coupled to antennas 21Oi ••• 21O n , respectively, for communicating with a mobile network.
  • the transceiver modules 20Oi ••• 20O n are GSM modules in one exemplary embodiment.
  • the digital interface modules 300i ••• 300 m are coupled to antennas 310i ... 310 m , respectively, for communicating with respective external communication devices 32Oi ...
  • the n transceiver modules 20Oi ••• 20O n and the m digital interface modules 300i ••• 300 m are all interlinked to one another via a digital data bus 400 and coupled to a high speed processor 500 functioning as a mixing module.
  • the high-speed processor 500 may include functionalities of both the processor 28 and the mixing module 34 of FIG. 1.
  • the digital data bus is configured as a time- division multiplexed PCM bus, wherein the n transceiver modules 20Oi ••• 20O n and the m digital interface modules 300i ••• 300 m are operated in different time slots 0 ... m+n-1 of a PCM data frame.
  • the processor 500 is set up as a master unit, whereas the m digital interface modules 300i ••• 300 m and the n transceiver modules 20Oi ••• 20O n function as slaves to the processor 500.
  • the number of available slots in a PCM frame of the digital data bus 400 limits the number of slave devices, i.e., the combined number of transceiver modules 20Oi ••• 20O n and digital interface modules 300i ••• 300 m , that can be connected to and operated on the same digital data bus 400.
  • multiple digital data buses, each configured as a PCM bus, with multiple slaves connected to each may be used.
  • a serial port may be used for control via an additional processor (not shown). Multiple devices in another embodiment may share a common serial port.
  • the same processor e.g., the processor 500
  • the same processor may be used to control the devices over the serial port.
  • aspects of the invention provide a mobile communication device (e.g., mobile telephone device) having at least two transceiver modules and being capable of conducting a conference call with a plurality of different users.
  • a mobile communication device e.g., mobile telephone device
  • the invention includes the claims and their insubstantial variations supported by this disclosure, and their equivalents.

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Human Computer Interaction (AREA)
  • Telephonic Communication Services (AREA)
  • Telephone Function (AREA)

Abstract

La présente invention concerne un dispositif de communications (10) pour un réseau mobile comportant un premier module émetteur-récepteur (30), un second module émetteur-récepteur (32) et un module mélangeur (34) couplé au premier module émetteur-récepteur (30) et au second premier module émetteur-récepteur (32). Le module mélangeur (34) est configuré pour combiner un premier signal de réception du premier module émetteur-récepteur (30) et un second signal de réception du second module émetteur-récepteur (32) en un signal de réception combiné à émettre en sortie vers un utilisateur (20, 26), permettant ainsi une conférence téléphonique comprenant un premier appel téléphonique et un second appel téléphonique.
PCT/IB2008/054262 2007-10-24 2008-10-16 Dispositif de communications mobiles et procédé pour effectuer des conférences téléphoniques Ceased WO2009053873A1 (fr)

Applications Claiming Priority (2)

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US98226107P 2007-10-24 2007-10-24
US60/982,261 2007-10-24

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