WO1992003878A1 - Systeme de communication sans fils permettant la transmission d'appels - Google Patents

Systeme de communication sans fils permettant la transmission d'appels Download PDF

Info

Publication number
WO1992003878A1
WO1992003878A1 PCT/US1991/005289 US9105289W WO9203878A1 WO 1992003878 A1 WO1992003878 A1 WO 1992003878A1 US 9105289 W US9105289 W US 9105289W WO 9203878 A1 WO9203878 A1 WO 9203878A1
Authority
WO
WIPO (PCT)
Prior art keywords
communication unit
call forwarding
information
routing
forwarding data
Prior art date
Application number
PCT/US1991/005289
Other languages
English (en)
Inventor
Robert Louis Breeden
Prabhakar Muppidi
Original Assignee
Motorola, Inc.
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 Motorola, Inc. filed Critical Motorola, Inc.
Publication of WO1992003878A1 publication Critical patent/WO1992003878A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/16—Communication-related supplementary services, e.g. call-transfer or call-hold
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W60/00—Affiliation to network, e.g. registration; Terminating affiliation with the network, e.g. de-registration
    • H04W60/06—De-registration or detaching

Definitions

  • This invention relates in general to radio communications systems, and in particular to a wireless telecommunication system support call forwarding to communication units.
  • CT-2 second generation cordless telephone systems
  • PSTN public or private switched telephone network
  • the user may receive an incoming telephone call via a telepoint base station after the communication unit has registered.
  • Registration is typically accomplished by establishing an RF link between the communication unit and the telepoint base station which is coupled to the PSTN.
  • the telepoint base stations typically provide telecommunications within approximately 150 meter radius of the station depending upon terrain and other obstructions that may interfere with the signalling.
  • a communication unit may receive an incoming call by scaning the available RF channels to find a telepoint station polling for the communication unit, and then may access the telepoint station via this channel.
  • the telepoint station likewise, scans the available channels for outbound calls from the communication units, and when the telepoint station detects a call request from a communication unit, interconnection with the PSTN is provided.
  • telepoint station operation has been primarily limited to one way communications originating from the communication unit unless the communication unit has registered at a telepoint station so that the communication unit may receive incoming calls. Unregistered communication units generally cannot be contacted to receive a call. Accordingly, it would be desirable to have a technique for re-routing a call for a deregistered communication unit so that important calls or communication is not frustrated by the operation of the communication system.
  • a communication unit is prompted by a base station for call forwarding information whenever the communication unit deregisters from the base station. Thereafter, calls for the communication unit will be forwarded in accordance with the call forwarding information provided by the communication unit or in accordance with default call forwarding data.
  • Figure 1 is a diagram of communication system in which the present invention may be advantageously employed.
  • Figures 2a and 2b are flow diagrams illustrating the operation of the telepoint base stations in accordance with the present invention.
  • Figures 3a-3c are flow diagrams illustrating the operation of the network control center in accordance with the present invention.
  • a radio communication system designed to interface wireless communication units 10, such as second generation cordless telephones (CT-2), with a public or private switched telephone network 14.
  • CT-2 second generation cordless telephones
  • a communication unit 10a To initiate a cordless telephone type call, a communication unit 10a establishes a radio frequency link with a telepoint base station 12a.
  • the telepoint base station 12a couples to the PSTN 14 thereby allowing information to be passed from the communication unit 10a to the PSTN 14 to call (for example) a telephone 16a.
  • a telephone call may be made from a conventional telephone 16b to a communication unit 10b, which has registered at a telepoint base station to receive incoming calls, by calling a telephone type identification number corresponding or associated with the communication unit 10b.
  • system access is implemented by assigning each communication unit 10 in the system its own unique telephone type number, just as if the communication unit 10 were a telephone instrument hard-wired to the PSTN 14.
  • the numbers assigned to the communication units 10 would be routed by the PSTN 14 to incoming ports 18 of a telephone type switch 20 of the communication system.
  • the switch 20 can be a devoted system switch or may comprise a conventional electronic telephone switching arrangement within a central telephone office.
  • the incoming ports 18 of the switch 20 ultimately become coupled to one of a plurality of connection ports 22 to await connection with the communication unit 10b.
  • an audible ring back signal (or equivalent) is provided to the caller as the switch 20 communicates with the telepoint network control center 24 via a data link 25 prior to the establishment of the communication link.
  • the switch 20 informs the network control center 24 of the presence of an incoming call for a communication unit 10b via the data link 25, after which the network control center 24 determines the location of the communication unit 10b from the registration information in the memory 26.
  • the network .control center 24 determines the location of the communication unit 10b
  • the telepoint base station 12b associated with the communication unit is contacted by the network control center via the PSTN and is instructed to poll for the communication unit 10b.
  • the telepoint base station 12b completes a call-back sequence so as to connect the communication unit 10b with the appropriate connection port 22.
  • the communication unit 10b has at least default call forwarding information stored in a memory 26, that the telepoint network control center 24 can provide to the PSTN to route incoming calls intended for a deregistered communication unit to any wireless or conventional wireline communication unit.
  • the PSTN can route incoming calls away from the communication system to another telephone (or equivalent) since the communication system would be incapable of contacting the deregistered or unregistered communication unit.
  • the default call forwarding information is stored within the network control center when the communication system is programmed to recognize the communication unit.
  • the default call forwarding information may be stored, changed, or updated at any time via accessing the memory 26 via any conventional personal computer or terminal.
  • a communication unit may deregister while operating within the communication system, which effectively prevents the communication unit from being located or contacted.
  • Deregistration can take place automatically, such as a deregistration from one base station when a communication unit subsequently forward registers in a second location.
  • automatic deregistration may take place at a predetermined time (e.g., every day at midnight for example) as determined by a real time clock 31.
  • a communication unit 10c can indicate a temporary or future deregistration time when forward registering.
  • a communication unit user is going to be at a restaurant for two hours he/she can input the time at which deregistration is to be effected (i.e., two hours from the current time), or a time period after for which he wishes to deregister (i.e., for the next two hours after which the communication unit re-registers).
  • the network control center 24 compares the time indicated as a time of deregistration with the time indicated by the real time clock 31 and erases or deletes the forward registration information from the memory 26 upon coincidence.
  • Administrative lists are stored in a memory 30 for access by the telepoint network control center 24 in a conventional manner.
  • a communication unit may also deregister manually at any time.
  • an RF link is established between the communication unit and the telepoint base station which is coupled to the PSTN.
  • the RF link enables the communication unit to transmit a deregistration command or request that renders any prior registration ineffective (e.g., the prior registration may be deleted, erased or merely ignored).
  • the communication unit is prompted via a transmission from the base station to transmit any desired call forwarding information (if different from the default information) so that the network control center can program or send the call forwarding information to the PSTN.
  • a deregistered communication unit (10c) can also re ⁇ register (or forward register) by establishing an RF link with a telepoint base station 12c and calls a predetermined access number.
  • the telepoint base station forwards information identifying the communication unit 10c and the telepoint base station 12c to a forward registration port 28 coupled to the telepoint network control center 24.
  • the telepoint network control center 24 provides this information to the PSTN and also stores this information in the memory 26. Once a communication unit has registered, the network control center contacts the PSTN and automatically cancels any call forwarding programming (either default or otherwise). Thereafter the PSTN will route incoming calls to the switch 20 so that the network control center can route the incoming call to the now registered communication unit.
  • the memory 26 stores this information.
  • the network control center 24 can either process incoming calls in accordance with the registration data or automatically program the PSTN to call forward incoming calls to an alternate communication system (e.g., conventional land line, cellular, etc.). This process facilitates the processing of incoming calls and minimizes the time a system user is incapable of receiving a call because his/her communication unit is currently not registered on any telepoint base station.
  • an alternate communication system e.g., conventional land line, cellular, etc.
  • a plurality of telepoint base stations 12b, 12c, and 12d, together covering the single geographic location 32 are preferably wired together via a data link 34. If the telepoint base station 12b does not locate the communication unit 10b after a sufficient time, information can be passed via the data link 34 to the telepoint base stations 12c and 12d. Telepoint base stations 12c and 12d can then attempt to locate the communication unit 10b.
  • the telepoint base station 12d can couple the communication unit 10b' to connection port 22 in the manner described above. Therefore, a user of a communication unit operating within a limited geographic subset of the communication system does not have to continually re-register every time he/she moves from the coverage area of a telepoint base station 12.
  • Figures 2a and 2b depict the operation of the telepoint base stations 12 (FIG.1) to effect the present invention.
  • the base stations look for deregistration requests or commands from the various communication units. If a deregistration signal is detected (decision 50), control is routed to the flow illustrated in Figure 2b. Conversely, if a communication unit registers (reregisters) on a base station, (decision 52) the network control center is contacted via the PSTN and the communication unit's identification information is sent for storage in the memory 26 of Figure 1 (step 51). Additionally, the base station's identification is also sent to the network control center so that the communication unit can be found by the network control center.
  • the base station operates to prompt the deregistering communication unit to provide call forwarding information as to where future incoming calls should be directed (step 54). If the base station does not receive this information (such as within a predetermined time interval) the default call forwarding information will automatically be used by the network control center (see Figures 3a-3c). In any event, the deregistration information is forwarded by the base station to the network control center (step 56). Additionally, if the deregistering user has provided any call forwarding information (decision 58), this information is also sent to the network control center (step 60).
  • Figures 3a-3c illustrate the network control center's operation when a communication unit registers (decision 62) or deregisters (decisions 64 and 86) within the communication system. If a base station transmits registration information to the network control center, the information is stored in a memory 26 of Figure 1 (step 68) and any prior call forwarding information sent to the PSTN is cancelled (step 70). Conversely, if a communication unit manually deregisters, the network control center looks to see if call forwarding information is forthcoming (decision 72). If so, the call forwarding information is sent to the PSTN (step 74).
  • the network control center sends the default call forwarding information to the PSTN (step 78).
  • communication units are prompted by a base station for call forwarding information whenever they deregister from a base station. Thereafter, calls for the communication unit will be forwarded in accordance with the call forwarding information provided by the communication unit or in accordance with default call forwarding data. In this way, incoming calls will be properly routed to alternate communication destinations whenever the communication unit is not registered for receiving incoming calls.

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

Abstract

Une unité de communication (10) est interrogée par une station de base (12) sur des informations de transmission d'appel lorsque ladite unité de communication (10) n'est plus alignée sur la station de base (12), après quoi les appels pour l'unité de communication seront transmis selon les informations de transmission d'appel fournies par l'unité de communication ou selon des données de transmission d'appel par défaut.
PCT/US1991/005289 1990-08-17 1991-07-29 Systeme de communication sans fils permettant la transmission d'appels WO1992003878A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US56931890A 1990-08-17 1990-08-17
US569,318 1990-08-17

Publications (1)

Publication Number Publication Date
WO1992003878A1 true WO1992003878A1 (fr) 1992-03-05

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Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0639034A1 (fr) * 1993-08-13 1995-02-15 Alcatel Mobile Communication France Procédé d'initialisation d'un transfert d'appel à l'aide d'un dispositif supportant une station radio mobile
DE4343335A1 (de) * 1993-12-18 1995-06-22 Tadicom Europ Gmbh Verfahren zum Erreichen von Fernsprechteilnehmern in festen und mobilen Fernsprechnetzen unter Verwendung eines Mobiltelefons
EP0735791A2 (fr) * 1995-03-31 1996-10-02 Nec Corporation Dispositif et méthode de blocage de l'enregistrement de position pour un radiotéléphone mobile
US5608782A (en) * 1992-02-28 1997-03-04 At&T Telephone call connection method with automated paging and call bridging
EP0720406A3 (fr) * 1994-12-27 1999-03-31 Siemens Aktiengesellschaft Méthode d'aide à l'établissement d'un appel vers un téléphone mobile connecté à un système de communication à commande programmée
WO2000016571A2 (fr) * 1998-09-17 2000-03-23 At Mobile.Com Corporation Traitement d'appels pour dispositifs informatiques connectes a un reseau de donnees
DE10057847A1 (de) * 2000-11-22 2002-05-29 Fujitsu Siemens Computers Gmbh Kommunikationseinheit
US7130647B2 (en) * 2000-12-27 2006-10-31 Matsushita Electric Industrial Co., Ltd. Cordless telephone system
US7804821B2 (en) 2000-12-14 2010-09-28 Bridgeport Networks, Inc. Circuit switched cellular network to internet calling with internet antennas
US7809381B2 (en) 2004-07-16 2010-10-05 Bridgeport Networks, Inc. Presence detection for cellular and internet protocol telephony
US9774695B2 (en) 2009-06-17 2017-09-26 Counterpath Corporation Enhanced presence detection for routing decisions

Citations (4)

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Publication number Priority date Publication date Assignee Title
US4512017A (en) * 1983-02-04 1985-04-16 At&T Information Systems Digital dual channel communication terminal
US4512016A (en) * 1983-02-04 1985-04-16 At&T Information Systems Inc. Digital communication station signaling control
US4829554A (en) * 1985-01-31 1989-05-09 Harris Corporation Cellular mobile telephone system and method
US4833701A (en) * 1988-01-27 1989-05-23 Motorola, Inc. Trunked communication system with nationwide roaming capability

Patent Citations (4)

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Publication number Priority date Publication date Assignee Title
US4512017A (en) * 1983-02-04 1985-04-16 At&T Information Systems Digital dual channel communication terminal
US4512016A (en) * 1983-02-04 1985-04-16 At&T Information Systems Inc. Digital communication station signaling control
US4829554A (en) * 1985-01-31 1989-05-09 Harris Corporation Cellular mobile telephone system and method
US4833701A (en) * 1988-01-27 1989-05-23 Motorola, Inc. Trunked communication system with nationwide roaming capability

Cited By (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6192254B1 (en) * 1992-02-28 2001-02-20 At&T Corporation Personal portable apparatus for use in completing a telephone call
US5608782A (en) * 1992-02-28 1997-03-04 At&T Telephone call connection method with automated paging and call bridging
US5644626A (en) * 1992-02-28 1997-07-01 At&T Apparatus and method for connecting telephone calls using automated paging and call bridging
US5884167A (en) * 1992-02-28 1999-03-16 At&T Corp Method for completing a conference with a personal communications units
EP0639034A1 (fr) * 1993-08-13 1995-02-15 Alcatel Mobile Communication France Procédé d'initialisation d'un transfert d'appel à l'aide d'un dispositif supportant une station radio mobile
FR2709034A1 (fr) * 1993-08-13 1995-02-17 Alcatel Mobile Comm France Procédé de transfert d'appels à partir d'une station mobile vers un autre poste, et dispositif de recharge pour la mise en Óoeuvre de ce procédé.
DE4343335A1 (de) * 1993-12-18 1995-06-22 Tadicom Europ Gmbh Verfahren zum Erreichen von Fernsprechteilnehmern in festen und mobilen Fernsprechnetzen unter Verwendung eines Mobiltelefons
DE4343335C2 (de) * 1993-12-18 1998-04-30 Krone Ag Verfahren zum Erreichen von Fernsprechteilnehmern in festen und mobilen Fernsprechnetzen unter Verwendung eines Mobiltelefons
EP0720406A3 (fr) * 1994-12-27 1999-03-31 Siemens Aktiengesellschaft Méthode d'aide à l'établissement d'un appel vers un téléphone mobile connecté à un système de communication à commande programmée
EP0735791A2 (fr) * 1995-03-31 1996-10-02 Nec Corporation Dispositif et méthode de blocage de l'enregistrement de position pour un radiotéléphone mobile
US5983103A (en) * 1995-03-31 1999-11-09 Nec Corporation Location registration inhibition control apparatus for mobile radio telephone and its method thereof
SG88720A1 (en) * 1995-03-31 2002-05-21 Nec Corp Location registration inhibition control apparatus for mobile radio telephone and its method thereof
EP0735791A3 (fr) * 1995-03-31 1999-04-28 Nec Corporation Dispositif et méthode de blocage de l'enregistrement de position pour un radiotéléphone mobile
WO2000016571A3 (fr) * 1998-09-17 2000-08-17 At Mobile Com Corp Traitement d'appels pour dispositifs informatiques connectes a un reseau de donnees
WO2000016571A2 (fr) * 1998-09-17 2000-03-23 At Mobile.Com Corporation Traitement d'appels pour dispositifs informatiques connectes a un reseau de donnees
US6560216B1 (en) 1998-09-17 2003-05-06 Openwave Systems Inc. Data network computing device call processing
US7130296B2 (en) 1998-09-17 2006-10-31 Openwave Systems Inc. System and method for mobile computing device registration with a service node
US7656864B2 (en) 1998-09-17 2010-02-02 Openwave Systems Inc. Data network computing device call processing
DE10057847A1 (de) * 2000-11-22 2002-05-29 Fujitsu Siemens Computers Gmbh Kommunikationseinheit
US7804821B2 (en) 2000-12-14 2010-09-28 Bridgeport Networks, Inc. Circuit switched cellular network to internet calling with internet antennas
US8335187B2 (en) 2000-12-14 2012-12-18 Bridgeport Networks, Inc. Routing mobile voice calls
US7130647B2 (en) * 2000-12-27 2006-10-31 Matsushita Electric Industrial Co., Ltd. Cordless telephone system
US7809381B2 (en) 2004-07-16 2010-10-05 Bridgeport Networks, Inc. Presence detection for cellular and internet protocol telephony
US9774695B2 (en) 2009-06-17 2017-09-26 Counterpath Corporation Enhanced presence detection for routing decisions

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