GB2282735A - Autorouting system for mobile telephones - Google Patents

Autorouting system for mobile telephones Download PDF

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Publication number
GB2282735A
GB2282735A GB9311533A GB9311533A GB2282735A GB 2282735 A GB2282735 A GB 2282735A GB 9311533 A GB9311533 A GB 9311533A GB 9311533 A GB9311533 A GB 9311533A GB 2282735 A GB2282735 A GB 2282735A
Authority
GB
United Kingdom
Prior art keywords
handset
base station
signal
telephone
signals
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.)
Granted
Application number
GB9311533A
Other versions
GB9311533D0 (en
GB2282735B (en
Inventor
Peter Alan Ramsdale
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.)
MERCURY PERSONAL COMMUNICATION
MPC 92 Ltd
USW PCN Inc
Original Assignee
MERCURY PERSONAL COMMUNICATION
MPC 92 Ltd
USW PCN Inc
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Publication date
Application filed by MERCURY PERSONAL COMMUNICATION, MPC 92 Ltd, USW PCN Inc filed Critical MERCURY PERSONAL COMMUNICATION
Priority to GB9311533A priority Critical patent/GB2282735B/en
Publication of GB9311533D0 publication Critical patent/GB9311533D0/en
Publication of GB2282735A publication Critical patent/GB2282735A/en
Application granted granted Critical
Publication of GB2282735B publication Critical patent/GB2282735B/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/02—Terminal devices
    • H04W88/06—Terminal devices adapted for operation in multiple networks or having at least two operational modes, e.g. multi-mode terminals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W92/00—Interfaces specially adapted for wireless communication networks
    • H04W92/02—Inter-networking arrangements
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Landscapes

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

Abstract

A telephone system in which the user carries a handset which operates both as a mobile telephone when away from a home base station through a cellular radio network, and the handset automatically initiates operation of a land based line system when located at or near to a home base station. The initiation of the land base station may alternatively be set up by a unit separate from the handset and carried by the user or when the handset operates as a mobile telephone it transmits low power narrow bandwidth telemetry signals adapted to identify the handset. The homebase station may include reception means for the low power narrow bandwidth telemetry signals, signal interpretation means and signal response means. The interpretation means provides an output signal when the identifying signal from the handset, signal interpretation means and signal response means. In a second operating mode incoming calls to the handset may be routed through the PSTN system. The identifying signal may be an infra-red or an ultrasonic signal. The land base station can transmit low power identity signals so that when a handset receives the identity signals it transmits a confirmation signal and the land base station switches the handset signals to the second operating mode. In one embodiment the operation of the land based line system is initiated when the handset is detected by its presence in a charging station. In an alternative embodiment the operation of the land based line system is initiated when the handset is identified by recognition of the code signals used for calling and maintaining affiliation with a cellular radio network.

Description

AUTOROUTING SYSTEM FOR MOBILE TELEPHONES This invention relates to an autorouting system for mobile telephones and particularly a system allowing mobile use on a cellular system and static or small area use on a conventional telephone network.
Personal telephone systems exist which allow the user to operate a handset across large areas of a country by means of a link with a cellular radio network. The comparatively high costs of running such cellular radio networks and the added utility of mobility are passed on to the user who pays higher charges than when using a public switched telephone network (PSTN) which is primarily based on landlines and directional radio links and simple switched exchanges. For this reason when a telephone user is at a static location in an office or at home it is preferred to use the PSTN system. The conventional solution is to have two telephone handsets; one for mobile use to operate in conjunction with a cellular radio network and a static base telephone connected to the PSTN system.The handset of the latter telephone may be connected by wire to the base unit or by a short range, e.g. 100 m radio link when it is usually referred to as a cordless telephone.
In order that the need for two telephones could be eliminated it has been suggested that handsets should be designed which are adapted to operate on both a cellular radio network and on the PSTN. Such proposed dual mode handsets must contain facilities to enable them to operate on both systems. - The changeover from one system to the other takes place automatically when the user enters or leaves the home base station area, i.e. home or office. This requires incoming calls to be forwarded to the appropriate network. An auto dialler can be used to alert the network switches such that routing addresses are changed for inbound calls. For this system to operate the home base station must include a radio transmitter which communicates with the mobile telephone when it is at the home base station.The inclusion of such a transmitter in the home base station involves considerable cost as the transmitter must be capable of communicating the complete range of speech frequencies in analogue or digital form together with signals to locate the handset and set up telephone calls. While further complication arises from frequency planning to prevent interference between separate home base station systems or circuitry to avoid automatically such problems (dynamic channel allocation). Furthermore all the home base station telephones are activated when the mobile telephone is at the home base station. An advantage of this scheme is that the user receives calls made to his personal (mobile) number on his home system when this is more appropriate.
According to the present invention there is provided a telephone system in which the user carries a handset which operates both as a mobile telephone when away from a home base station through a cellular radio network and which automatically initiates operation of a land based line system when located at or near to a home base station. In one embodiment the initiation of the home base station can be set up by a unit separate from the handset and carried by the user.
Again this enables the user to be contactable always by a single personal number. This can include the extension of use of this personal number to areas outside the geographic coverage area of the cellular radio network.
In a preferred embodiment the handset operates as a conventional mobile telephone receiving signals from and transmitting signals into a cellular radio network. Apart from the facility to transmit data and analogue signals for call connection. identification and traffic purposes in its cellular mode. the handset also transmits low power narrow bandwidth telemetry signals which identify the user.
Static locations. e.g. homes or offices. have installed home base station units which are connected to the PSTN system and which have radio reception means adapted to receive the handset telemetry signals and interpret and respond to them. When the user comes into close proximity with a home base station the identity signals are received and. if accepted by the home base station. act as a key to switch the handset signals to a second operating mode in which incoming calls calling the number of the mobile telephone user are routed through the PSTN system without the need for the user to take any action. The handset will continue to operate as a mobile telephone within the office or home for making outgoing calls. However incoming calls. regardless of origin. are routed to the home base station through the PSTN system.
As this system utilises low power. narrow bandwidth telemetry signals which can be sent as non-continuous short bursts only. interference and frequency planning difficulties are minimal.
In any of the embodiments the identity signal need not be a radio signal but may be an infra red signal or an ultrasonic signal possibly restricting the catchment area to a single room. By choice of radio frequency power level and modulation method the catchment area of a radio based system can be varied.
Using any form of cordless link however has the advantage that mobile telephones fitted to motor vehicles may operate the call rerouting system when the vehicle is parked close to the home base station or in an associated garage.
The invention permits the user to receive calls on his single personal number from whichever is the most appropriate network. cellular radio or PSTN. at a given time without the need for the complexity of a dual mode handset or cost of a fully functional home base station.
In an alternative embodiment low power identity signals may be transmitted by the home base station unit. When the portable handset comes within reception area of these signals an identity signal is transmitted to the home base station unit confirming the handset's presence within the home base station unit's catchment area and its identity.
As described previously the home base station switches the handset signals into the PSTN system without user intervention.
In yet a further embodiment the change in routing of incoming calls may be inititiated by detection of the presence of the mobile handset in a specific location such as a charging station. The detection of the handset.
which may take place in known manner by means of direct electrical connection. optical. magnetic or other detection devices. initiates an interogation routine to confirm the identity of the user before routing incoming calls into the PSTN system.
In a further embodiment the identity of the handset can be established in known manner by means of recognising features of the code generating and detecting system used for calling and maintaining affiliation to the cellular radio network Alternatively a separate identity code may be transmitted for activating the mode change when the handset enters the catchment area of a home base station unit. It will be clear that in certain cases in may be advantageous for a single handset to be capable of changing to a mode of operation which uses the PSTN system at a number of locations. for instance at different office locations of an organisation or company.
When operating the dual mode system in a home or office environment as a result of the mobile handset keying the routing control system all incoming calls will be routed through the PSTN system to the home base station unit.
Such calls will cause all static telephones connected to the system at the home base station to ring.
The change of mode allowing the mobile handset to use the PSTN system when at a home base station will primarily affect incoming calls. As part of the mode changing operation the home base station will send signals to the central operating system so that any calls for the handset number. whether from mobile telephones or PSTN sources.
will be directed through the PSTN system to the home base station and not through the cellular radio network. The mobile unit however remains functional as a cellular radio network telephone and outgoing calls may be made in the usual manner regardless of incoming calls being received by the home base station.
The home base station unit may also comprise one or more static telephone handsets. When outside calls are made to the number of the mobile telephone the presence of the handset at the home base station will ensure that one of the static telephones can be used to receive the call. A degree of local mobility is possible at the home base station if one of the telephone handsets is a cordless telephone.
A further service is possible which does not use a cellular telephone at all. The user carries the telemetry unit only. Whenever the user is near his home. or other telephones associated with the base station. they would be activated to become his personal telephone. Such a telemetry unit can be integrated with other devices carried by the user such as a DTMF tone generator This can be used to actuate call forwarding at any telephone while those with the home base unit would be activated automatically.
Alternatively the telemetry unit could be integrated with a subscriber identity module (SIM) card. This is a so-called smart card used to enable some cellular telephones for a specific user.

Claims (11)

1. A telephone system in which the user carries a handset which operates both as a mobile telephone when away from a home base station through a cellular radio network and which automatically initiates operation of a land based telephone line system when located at or near to a home base station.
2. The telephone system as claimed in claim 1, characterised in that when the handset operates as a mobile telephone it separately transmits low power narrow bandwidth radio frequency telemetry signals, either continuously or periodically, adapted to identify the handset.
3. The telephone system as claimed in claim 1, characterised in that the initiation of the land base station is set up by a unit separate from the handset and carried by the user which initiates a radio frequency identifying signal either coninously or periodically.
The telephone system as claimed in claim 2 or claim 3, characterised in that the homebase station includes reception means for the low power narrow bandwidth telemetry signals, signal interpretation means and signal response means.
5. The telephone system as claimed in claim 4, characterised in that the interpretation means provides an output signal when the identifying signal from the handset is recognised and the response means switches incoming calls to the handset to a second operating mode.
6. The telephone system as claimed in claim 5, characterised in that in the second operating mode incoming calls to the handset are routed through the PSTN or other land based line system.
7. The telephone system as claimed in claim 1, characterised in that the land base station transmits low power radio frequency identity signals either continuously or periodically and in that when a handset receives the identity signals it transmits a confirmation signal and the land base station switches the incoming calls to the handset to a second operating mode.
8. The telephone system as claimed in any of the claims 2 to 7, characteri-sed in that the identifying signal is an infra-red or ultrasonic signal.
9. The telephone system as claimed in claim 1, characterised in that the operation of the land based line system is initiated when the handset is detected by its presence in a charging station.
10. The telephone system as claimed in claim 1, characterised in that the operation of the land based line system is initiated when the handset is identified by recognition of the code signals used for calling and maintaining affiliation with a cellular radio network.
11. Telephone systems as claimed in claim 1 and as herein described.
GB9311533A 1993-06-04 1993-06-04 Autorouting system for mobile telephones Expired - Lifetime GB2282735B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB9311533A GB2282735B (en) 1993-06-04 1993-06-04 Autorouting system for mobile telephones

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB9311533A GB2282735B (en) 1993-06-04 1993-06-04 Autorouting system for mobile telephones

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GB9311533D0 GB9311533D0 (en) 1993-07-21
GB2282735A true GB2282735A (en) 1995-04-12
GB2282735B GB2282735B (en) 1998-11-18

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WO1999053712A1 (en) * 1998-04-09 1999-10-21 Telefonaktiebolaget Lm Ericsson (Publ) Method and arrangement for determining the presence of a mobile station in a determined area
FR2784843A1 (en) * 1998-10-20 2000-04-21 Sagem METHOD FOR ACTIVATING A CALL TRANSFER PROCESS AND TELEPHONE TERMINAL FOR IMPLEMENTING THE METHOD
FR2786974A1 (en) * 1998-12-07 2000-06-09 Sagem METHOD FOR ROUTING INCOMING CALLS TO A PERSON
EP1041796A2 (en) * 1999-03-30 2000-10-04 Robert Bosch Gmbh Call forwarding method for a telecommunication device
GB2353441A (en) * 1999-05-25 2001-02-21 Sagem Telephone call routing for a local telephone network and associated router
WO2001045434A2 (en) * 1999-12-17 2001-06-21 Siemens Aktiengesellschaft Telecommunication terminals and method for controlling the redirection of calls between telecommunication terminals
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FR2776884A1 (en) * 1998-03-30 1999-10-01 Alsthom Cge Alcatel MIXED TELEPHONE INSTALLATION
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FR2784843A1 (en) * 1998-10-20 2000-04-21 Sagem METHOD FOR ACTIVATING A CALL TRANSFER PROCESS AND TELEPHONE TERMINAL FOR IMPLEMENTING THE METHOD
EP0996272A1 (en) * 1998-10-20 2000-04-26 Sagem Sa Method for activating a call transfer process and terminal using this method
FR2786974A1 (en) * 1998-12-07 2000-06-09 Sagem METHOD FOR ROUTING INCOMING CALLS TO A PERSON
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EP1041796A3 (en) * 1999-03-30 2004-04-07 Siemens Aktiengesellschaft Call forwarding method for a telecommunication device
EP1041796A2 (en) * 1999-03-30 2000-10-04 Robert Bosch Gmbh Call forwarding method for a telecommunication device
GB2353441A (en) * 1999-05-25 2001-02-21 Sagem Telephone call routing for a local telephone network and associated router
GB2353441B (en) * 1999-05-25 2004-05-26 Sagem Telephone call routing assembly for a local telephone network and associated router
WO2001045434A2 (en) * 1999-12-17 2001-06-21 Siemens Aktiengesellschaft Telecommunication terminals and method for controlling the redirection of calls between telecommunication terminals
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GB2282735B (en) 1998-11-18

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