WO2001008386A1 - An accessory for a mobile telephone - Google Patents
An accessory for a mobile telephone Download PDFInfo
- Publication number
- WO2001008386A1 WO2001008386A1 PCT/GB2000/001685 GB0001685W WO0108386A1 WO 2001008386 A1 WO2001008386 A1 WO 2001008386A1 GB 0001685 W GB0001685 W GB 0001685W WO 0108386 A1 WO0108386 A1 WO 0108386A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- data
- telephone
- accessory
- transponder
- accessory according
- Prior art date
Links
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
- 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
- H04M1/6075—Portable telephones adapted for handsfree use adapted for handsfree use in a vehicle
- H04M1/6083—Portable telephones adapted for handsfree use adapted for handsfree use in a vehicle by interfacing with the vehicle audio system
- H04M1/6091—Portable telephones adapted for handsfree use adapted for handsfree use in a vehicle by interfacing with the vehicle audio system including a wireless interface
-
- 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
Definitions
- This invention relates to an accessory for a mobile telephone.
- Mobile telephones are highly prevalent and are increasingly used as a main form of communication as costs of telephones and call time decreases. Often mobile telephones are used in a so-called "hands free” mode, for example when working or when driving a vehicle. As the number of units increases, there is a corresponding increase in the risk of interference or cross-talk between two or more telephones.
- the present invention arose to reduce these and other problems.
- an accessory for a mobile telephone including: means for connecting the accessory to the telephone so that data can be received from and transmitted to the telephone; and means for transmitting data to and receiving data from a remote transponder earpiece; characterised in that the data which is transmitted to and received from the transponder earpiece is digital data.
- an encryptor/decryptor provides a coded version of transmitted and received data signals from and to the telephone, via the transceiver to the transponder earpeice.
- the encryptor/decryptor enables a digital signal to be sent and received, thereby removing the risk of interference and greatly increasing security.
- a remote transponder earpiece is adapted to be connected to the telephone.
- a switch is preferably provided on the transponder earpiece which is easily accessible and manually operable. The activation of the switch has the effect of lifting or replacing a handset; that is switching the telephone on or off.
- the transponder preferably includes a microphone.
- the transponder also includes a rechargeable battery and is adapted to be recharged from an energy source via the telephone. This energy source may be the battery of the telephone or it may be a current source (which charges the battery), which has been suitably modified.
- Means for transmitting a security code can be included in the telephone, so that, upon charging or re-charging of the transponder, an enabling or other code signal can be written to a memory in the transponder. Failure of the transponder to receive this code results in it being disabled. This prevents a transponder from being used with an 'unauthorised' telephone.
- Figures la to c show general views of a transponder, depicting diagrammatically, microphone and earpiece;
- Figure 2 is an overall view of a mobile telephone, showing diagrammatically, a means for transmitting/receiving data;
- Figure 3 shows the transponder inserted into the arrangement of Figure 2 for charging/recharging
- Figures 4 and 5 show schematic circuit diagrams of two versions of the transponder, which may be incorporated into the earpiece transponder;
- Figure 6 shows a circuit diagram of an alternative version of the transponder operating in 'TDMA' mode.
- accessory 10 comprises two main sections, a user worn earpiece/microphone unit (the earpiece transponder) 12 and the cellphone unit 14 (transceiver) which in use is connected to a telephone.
- Figures lb and lc show earpiece unit 13 and microphone unit 15 as separate. Antenna 17 is also depicted.
- Telephone quality voice is transmitted between the transceiver 14 and transponder 12.
- data (approx 33Kbits/sec) can be transferred instead of voice data.
- a 'sequence generator' is included to send preset data sequences if a button on the earpiece is pressed. This can be used to receive incoming calls ('lift handset' function) and similar purposes.
- Relatively low RF frequencies are used, typically around 27MHz or 48MHz. This assists in reducing costs and minimises current consumption.
- transmissions are digital and each user has a code number for a unique encryption code.
- delta modulation is preferred for the digitisation of voice signals.
- digital modulation Associated with digital modulation are other circuit blocks, two key circuit blocks are clock recovery in receive mode and splatter filtering prior to modulation, which is necessary to restrict transmitted bandwidth.
- Transmitted power levels are relatively low, typically around O.lmW, since the range of the transponder only needs to be about 2m.
- the bandwidth is relatively wide, at least 32KHz is needed each way.
- an analog-to-digital (AD) modulator 52 converts voice data into digital signals. Digital signals are then sent to radio frequency (RF) transmitter 54. The receive section is shown diagrammatically at 56. Received data is demodulated by demodulator 58. Demodulated data is then amplified, to a desired level by audio amplifier 60.
- AD analog-to-digital
- RF radio frequency
- the embodiment shown in Figure 5 has many sections in common with the embodiment in Figure 4 and differs principally in that no conversion takes place as detection occurs at 49MHz and the signals are filtered and used directly.
- the fact that there is no down converter reduces the number of components.
- To operate in duplex mode one approach is to use different transmit and receive frequencies, but this needs better filtering or different frequency bands.
- One approach is to use single channel (Frequency Division Multiplex Addressing) FDMA. However, separate channels are used for transmit and receive modes, although clearly some guide band "space" is required between each frequency. When using FDMA less timing control circuitry is required. The levels ensure that interference between users is minimal, unless they are at extremely close range. Because of encryption, the only perceived effects are signal loss. In this scenario about lOOKHz of 'quiet' spectrum with the regulatory authorities needs to be identified.
- TDMA Time Division Multiplex Addressing
- a helmet stand may be made to incorporate an inductive loop charger, so no wires or plugs are needed. Transfer or identity code could be via an inductive loop charger.
- the bike or car could form a third source of voice for satnav commands, and/or intelligent roadside information such as status of fuel gauge. Use as a tag
- this device could be used as a two-way TAG. If a credit (smart) card reader is added to the user unit, it could carry out automatic payments in supermarkets, petrol stations, tollbooths, etc.
- a memory is attached to the user unit, and since the user unit has a unique code, it is possible for the user to carry data from one place to another. This could be used to transfer files from one computer to another without floppy disks. Or in locations such as building sites, data could be transferred from one site office to another without a wearer taking any action other than walking in the right direction. In an airport, if passengers were 'tagged' it could eliminate boarding passes and airlines would know passenger location.
- the earpiece Since it is possible for the earpiece to define a users language to a host system, the earpiece could be used to give correct language commentaries in museums, exhibitions and conference halls.
- Units are small and can transfer data over short ranges, so a wireless monitoring system could use suitably modified devices.
- Figure 6 shows an example of a system using a TDMA configuration.
- an embodiment of the invention may use (Time Division Multiplex Access) TDMA and can operate in a single frequency radio channel.
- An encrypted audio is sent in packets and the transponder alternately receives and transmits these data packets.
- the bandwidth of this channel will be more than twice that needed for a single simplex channel.
- transmit power is kept to the minimum needed to maintain communication, then it is possible for most users to be accommodated on a single radio channel. Encryption prevents audible interference from other users.
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Multimedia (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU45889/00A AU4588900A (en) | 1999-04-30 | 2000-05-02 | An accessory for a mobile telephone |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GBGB9909995.4A GB9909995D0 (en) | 1999-04-30 | 1999-04-30 | Accessory for a mobile telephone |
GB9909995.4 | 1999-04-30 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2001008386A1 true WO2001008386A1 (en) | 2001-02-01 |
Family
ID=10852564
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/GB2000/001685 WO2001008386A1 (en) | 1999-04-30 | 2000-05-02 | An accessory for a mobile telephone |
Country Status (3)
Country | Link |
---|---|
AU (1) | AU4588900A (en) |
GB (1) | GB9909995D0 (en) |
WO (1) | WO2001008386A1 (en) |
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2823046A1 (en) * | 2001-03-30 | 2002-10-04 | Roland Sayag | WIRELESS ASSEMBLY COMPRISING A HEADSET AND AN INTERMEDIATE MODULE CONNECTED TO A MOBILE TELEPHONE |
GB2379120A (en) * | 2001-06-22 | 2003-02-26 | Christopher Portelli | Wireless hands free system for mobile phone |
WO2003039114A1 (en) * | 2001-11-02 | 2003-05-08 | Addvalue Technologies Ltd | Wireless communication apparatus |
FR2835139A1 (en) * | 2002-01-22 | 2003-07-25 | Innovi Technologies Ltd | METHOD FOR TRANSMITTING VOICE / DATA SIGNALS BETWEEN A BASIC DEVICE AND A SECONDARY OR INTERMEDIATE DEVICE |
GB2388279A (en) * | 2002-12-20 | 2003-11-05 | Peter Courtney | Secure transmission of audio signals |
EP1414221A1 (en) * | 2002-10-22 | 2004-04-28 | Sony Ericsson Mobile Communications AB | Battery supply for a headset system |
WO2004039046A2 (en) * | 2002-10-22 | 2004-05-06 | Sony Ericsson Mobile Communications Ab | Battery supply for headset system |
EP1536615A1 (en) * | 2003-11-26 | 2005-06-01 | Edison Technologies Gbr | Wireless headset for a portable electronic device |
EP1811754A1 (en) * | 2006-01-18 | 2007-07-25 | Research In Motion Limited | Communications mobile device with detachable user interface unit |
GB2452027A (en) * | 2007-07-27 | 2009-02-25 | Nathan Augustine Akerele | Bluetooth earpiece with data backup capabilities |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2277422A (en) * | 1993-03-23 | 1994-10-26 | Universal Exchange Limited | A headset accessory for a mobile telephone set |
DE29619070U1 (en) * | 1996-11-02 | 1997-03-06 | Prelle, Jürgen, 25421 Pinneberg | Mobile phone system |
EP0789474A2 (en) * | 1996-02-08 | 1997-08-13 | Nokia Mobile Phones Ltd. | A hands-free arrangement for mobile communication device |
-
1999
- 1999-04-30 GB GBGB9909995.4A patent/GB9909995D0/en not_active Ceased
-
2000
- 2000-05-02 WO PCT/GB2000/001685 patent/WO2001008386A1/en active Application Filing
- 2000-05-02 AU AU45889/00A patent/AU4588900A/en not_active Abandoned
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2277422A (en) * | 1993-03-23 | 1994-10-26 | Universal Exchange Limited | A headset accessory for a mobile telephone set |
EP0789474A2 (en) * | 1996-02-08 | 1997-08-13 | Nokia Mobile Phones Ltd. | A hands-free arrangement for mobile communication device |
DE29619070U1 (en) * | 1996-11-02 | 1997-03-06 | Prelle, Jürgen, 25421 Pinneberg | Mobile phone system |
Cited By (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2823046A1 (en) * | 2001-03-30 | 2002-10-04 | Roland Sayag | WIRELESS ASSEMBLY COMPRISING A HEADSET AND AN INTERMEDIATE MODULE CONNECTED TO A MOBILE TELEPHONE |
WO2002080503A1 (en) * | 2001-03-30 | 2002-10-10 | Alban Sayag | Wireless assembly comprising an ear pad and an intermediate module connected to a mobile telephone |
GB2379120A (en) * | 2001-06-22 | 2003-02-26 | Christopher Portelli | Wireless hands free system for mobile phone |
GB2379120B (en) * | 2001-06-22 | 2005-03-30 | Christopher Portelli | Cordless / Wireless hands free set for use with celular mobile telephones |
WO2003039114A1 (en) * | 2001-11-02 | 2003-05-08 | Addvalue Technologies Ltd | Wireless communication apparatus |
FR2835139A1 (en) * | 2002-01-22 | 2003-07-25 | Innovi Technologies Ltd | METHOD FOR TRANSMITTING VOICE / DATA SIGNALS BETWEEN A BASIC DEVICE AND A SECONDARY OR INTERMEDIATE DEVICE |
WO2003063456A1 (en) * | 2002-01-22 | 2003-07-31 | Innovi Technologies Limited | Method for the transmission of voice/data signals between a base device and an auxiliary device |
EP1414221A1 (en) * | 2002-10-22 | 2004-04-28 | Sony Ericsson Mobile Communications AB | Battery supply for a headset system |
WO2004039046A2 (en) * | 2002-10-22 | 2004-05-06 | Sony Ericsson Mobile Communications Ab | Battery supply for headset system |
WO2004039046A3 (en) * | 2002-10-22 | 2004-06-24 | Sony Ericsson Mobile Comm Ab | Battery supply for headset system |
US7305258B2 (en) | 2002-10-22 | 2007-12-04 | Sony Ericsson Mobile Communications Ab | Split battery supply |
CN100431325C (en) * | 2002-10-22 | 2008-11-05 | 索尼爱立信移动通讯股份有限公司 | Split battery supply |
GB2388279B (en) * | 2002-12-20 | 2004-03-17 | Peter Courtney | Secure transmission of audio signals |
GB2388279A (en) * | 2002-12-20 | 2003-11-05 | Peter Courtney | Secure transmission of audio signals |
EP1536615A1 (en) * | 2003-11-26 | 2005-06-01 | Edison Technologies Gbr | Wireless headset for a portable electronic device |
WO2005053289A1 (en) * | 2003-11-26 | 2005-06-09 | Edison Technologies Kg | Accessory cover for a portable electronic device |
EP1811754A1 (en) * | 2006-01-18 | 2007-07-25 | Research In Motion Limited | Communications mobile device with detachable user interface unit |
GB2452027A (en) * | 2007-07-27 | 2009-02-25 | Nathan Augustine Akerele | Bluetooth earpiece with data backup capabilities |
Also Published As
Publication number | Publication date |
---|---|
GB9909995D0 (en) | 1999-06-30 |
AU4588900A (en) | 2001-02-13 |
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