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WO2000028762A1 - Systeme et procede pour diriger, garder et distribuer des appels et echanger des informations entre reseaux - Google Patents

Systeme et procede pour diriger, garder et distribuer des appels et echanger des informations entre reseaux Download PDF

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Publication number
WO2000028762A1
WO2000028762A1 PCT/IB1999/001790 IB9901790W WO0028762A1 WO 2000028762 A1 WO2000028762 A1 WO 2000028762A1 IB 9901790 W IB9901790 W IB 9901790W WO 0028762 A1 WO0028762 A1 WO 0028762A1
Authority
WO
WIPO (PCT)
Prior art keywords
network
communication device
call
wireless communication
local
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/IB1999/001790
Other languages
English (en)
Inventor
Lisa Anne Fast
Laura A. Mahan
Andre Van Schyndel
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.)
Nortel Networks Corp
Nortel Networks Corp USA
Original Assignee
Nortel Networks Corp
Nortel Networks Corp USA
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 Nortel Networks Corp, Nortel Networks Corp USA filed Critical Nortel Networks Corp
Priority to AU63622/99A priority Critical patent/AU6362299A/en
Publication of WO2000028762A1 publication Critical patent/WO2000028762A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/42—Systems providing special services or facilities to subscribers
    • H04M3/54—Arrangements for diverting calls for one subscriber to another predetermined subscriber
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/24—Reselection being triggered by specific parameters
    • H04W36/32—Reselection being triggered by specific parameters by location or mobility data, e.g. speed data
    • H04W36/326—Reselection being triggered by specific parameters by location or mobility data, e.g. speed data by proximity to another entity
    • 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
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/42—Systems providing special services or facilities to subscribers
    • H04M3/42229—Personal communication services, i.e. services related to one subscriber independent of his terminal and/or location
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/42—Systems providing special services or facilities to subscribers
    • H04M3/4228—Systems providing special services or facilities to subscribers in networks
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/42—Systems providing special services or facilities to subscribers
    • H04M3/42314—Systems providing special services or facilities to subscribers in private branch exchanges
    • H04M3/42323—PBX's with CTI arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M7/00—Arrangements for interconnection between switching centres
    • H04M7/006—Networks other than PSTN/ISDN providing telephone service, e.g. Voice over Internet Protocol (VoIP), including next generation networks with a packet-switched transport layer
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/16—Performing reselection for specific purposes
    • H04W36/18—Performing reselection for specific purposes for allowing seamless reselection, e.g. soft reselection
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/24—Reselection being triggered by specific parameters
    • H04W36/32—Reselection being triggered by specific parameters by location or mobility data, e.g. speed data
    • H04W36/324—Reselection being triggered by specific parameters by location or mobility data, e.g. speed data by mobility data, e.g. speed data

Definitions

  • the present invention relates generally to communication systems, and more particularly to a system and method for automatically handing-off calls and call information in a seamless manner between a mobile communication device in communication with a remote network and a reference unit in communication with a local computer voice/data network.
  • PBXs public branch exchanges
  • PSTN public switched telephone network
  • DID Direct Inward Dialing
  • the problems associated with integrating multiple networks include behavioral problems and technical problems.
  • the value of solving the behavioral problems accrues to the end-user of the networks (e.g., the person with a mobile telephone on their belt, a proprietary digital telephone on their desk, and an IP or computer telephony integration (CTI) solution in their computer).
  • CTI computer telephony integration
  • IT information technology
  • One behavioral problem involves the need to learn different telephone usage for each network. Users typically have a different telephone device or interface for each network, and thus must learn how to use each device or interface and remember the differences.
  • users must change devices or interfaces when changing networks which often requires behavior that is not natural. For example, users must currently physically dock their wireless products to communicate with computers or other networks.
  • each device or network has particular strengths and weaknesses, causing the user to choose and switch between them for each call.
  • wireless users should use a wired telephone or IP computer voice solution, when they are available.
  • field trials and other studies indicate that wireless users still prefer their wireless telephone in those situations.
  • Many in-building wireless users start calls at their desks and then move away during the call, which increases traffic on the wireless network. Although these users could manually hand-off the call, doing so interrupts the conversation.
  • Systems and methods consistent with the present invention automatically hand- off calls and call information in a seamless manner between a wireless communication device in communication with a remote network and a reference unit in communication with a local computer data/voice network.
  • a system for automatically transferring a call between a first and second network comprises a communication device in communication with the first network; a reference unit in communication with the second network; proximity sensing means for determining whether the communication device is within a predetermined range of the reference unit; and call transfer means, coupled to the proximity sensing means, for transferring a call on the communication device from the first network to the second network, without interrupting the call, if the communication device is within a predetermined range of the reference unit.
  • a method for automatically transferring a call between a remote network and a local network comprises detecting a wireless communication device operating on the remote network within a predetermined range of a reference point operating on the local network; and automatically transferring an existing call, without interruption, between the remote network and the local network if the wireless communication device is within the predetermined range of the reference point.
  • Fig. 1 is a diagram of a call hand-off system consistent with the present invention
  • Fig. 2 is a flowchart of a method, consistent with the present invention, for automatically handing-off a call between a plurality of networks;
  • Fig. 3a is an illustration of the hand-off of an existing call to a local network, consistent with the present invention, as a wireless communication device user enters a building;
  • Fig. 3b is an illustration of the hand-off of an existing call to a local desktop environment, consistent with the present invention, as a wireless communication device user enters an office;
  • Fig. 4 is a flowchart of a method, consistent with the present invention, for handing-off a call between a local network and a remote network.
  • Methods and apparatus consistent with the present invention automatically hand-off calls and call information in a seamless manner between a wireless communication device in communication with a remote network and a reference unit in communication with a local computer data/voice network.
  • a wireless communication device e.g., mobile phone or portable computer
  • a user of a wireless communication device e.g., mobile phone or portable computer
  • This is accomplished by seamlessly integrating in-building computer data/voice networks with remote wireless networks such that an existing call on a mobile telephone can be automatically handed-off to a wired desktop device.
  • call information e.g., telephone directories and call histories
  • other data can also be automatically handed-off from the wireless communication device to a wired desktop device.
  • a user can view the handed-off information through an IP interface on a computer screen at their desktop.
  • Fig. 1 illustrates a call hand-off system 100 consistent with the present invention.
  • Call hand-off system 100 includes a remote wireless network 105 and a local network 110 that communicate via PSTN 125.
  • Remote wireless network 105 can be any wireless wide area network that supports voice and data transmission via a wireless communication device 115.
  • remote wireless network 105 can be an AMPS network that supports analog wireless communications or a PCS network that supports digital wireless communications.
  • remote wireless network 105 can transmit voice and data signals to wireless communication device 115 to establish a call or transfer information.
  • remote wireless network 105 can provide wireless communication services for virtually any type of device configured to support voice and/or data.
  • Wireless communication device 115 can be any type of device configured to communicate voice and data signals to and from remote wireless network 105.
  • a wireless communication device can be a mobile telephone or a computer equipped with communication capabilities (i.e., Palm PilotTM or NewtonTM).
  • wireless communication device 115 can be a pager or other form of wireless device that supports either analog or digital transmission.
  • Each wireless communication device 115 configured to operate with remote wireless network 105 includes an identification code that is used to identify the device within the network. For example, when a landline telephone user dials the telephone number (or IP address) of wireless communication device 115, the call is routed to remote network 105, which then hand- offs the call to wireless communication device 115 using its identification code.
  • Local network 110 is a computer voice and/or data network configured to operate in a limited area, such as a building or areas surrounding a building.
  • Local network 110 preferably includes wireless and wireline communication systems that support voice and IP protocol to provide building residents with a plurality of communication options.
  • local network 110 may include an in-building wireless system (e.g., Nortel's Companion MicrocellularTM system) that allows users to make internal and external calls using a wireless communication device. These wireless communication devices, however, can only be operated within a predetermined local network 110 service area. Embodiments consistent with the present invention allow users to operate their wireless communication device beyond local network 110 by handing-off the call to remote wireless network 105.
  • in-building wireless system e.g., Nortel's Companion MicrocellularTM system
  • local network 110 includes a hub 130, a voice server 132, a gateway 134, a mobile switching center 136, a base station controller 138, a plurality of base transceiver stations 140, 142 and 144, and network switching software 146.
  • a hub 130 a voice server 132, a gateway 134, a mobile switching center 136, a base station controller 138, a plurality of base transceiver stations 140, 142 and 144, and network switching software 146.
  • Hub 130 is a common connection point for components of local network 110 and includes multiple ports for routing voice and data signals. Thus, voice and data signals transferred between components of local network 110 are routed through hub 130. Hub 130 also receives voice and data signals from sources external to local network 110. For example, if a user were to make an external telephone call from a building serviced by local network 110, a voice signal would be routed from the telephone to hub 130. At that point, the voice signal would be routed within local network 110 and ultimately to a destination terminal via PSTN 125.
  • Voice server 132 is a voice mail system for local network 110. For example, if an external telephone call is received at local network 110, and an attempt to route the telephone call to local desktop environment 120 is unsuccessful, the caller can leave a voice mail message on voice server 132 for the intended party. Subsequently, the intended party can access its mailbox on voice server 132 to retrieve the saved message. Local network 110 users can also record a greeting for potential callers on voice server 132.
  • voice server 132 can also record a greeting for potential callers on voice server 132.
  • Gateway 134 serves as a communication link between local network 110 and external networks such as PSTN 125 or the Internet. When a user of local network 110 makes a telephone call, voice signals are sent through local network 110 and routed to PSTN 125 via gateway 134. Gateway 134 also receives voice and data signals from PSTN 125 and transfers these signals to hub 130 for routing. In addition, gateway 134 may be configured to communicate directly with an external wireless network via antenna 148.
  • Mobile switching center 136 includes hardware and software components for handing-off a call and call information between local network 110 and other networks, such as remote network 105.
  • the hardware components of mobile switching center 136 include one or more switching devices to handle several call hand-offs simultaneously.
  • the software components of mobile switching center 136 include network switching software.
  • Network switching software is executable code that performs the necessary steps to provide seamless call hand-offs between multiple networks. The method of handing-off an existing call and call information between networks is provided in greater detail below with reference to Figure 4.
  • Base station controller 138 is configured to control base stations located within the local environment through a wireless or wireline communication link.
  • a base station is a communication device that facilitates seamless hand-offs of in-building wireless calls. That is, if a building is equipped with a local wireless communication network, base stations are strategically placed therein to allow employees to "roam" within the building while on an existing call without interruption.
  • Base station controller 138 continuously monitors each base station and can be configured to operate in different modes (e.g., a day mode for higher traffic volume and a night mode for lower traffic volume). In addition, base station controller 138 can monitor each base station from within the local environment or from a remote location.
  • base transceiver stations 140, 142, and 144 are controlled by base station controller 138 to support an in-building wireless network. Each base station transceiver can support multiple base stations located throughout a facility. Base station controller 138 communicates with each of these base stations through base transceiver stations 140, 142, and 144 and antenna 148. One skilled in the art will appreciate that base transceiver stations may be added to or removed from local network 110, as necessary.
  • Local network 110 may be configured to support PCS, AMPS, code-division multiple access (CDMA), time-division multiple access (TDMA), the global system for mobile communications (GSM), and other communication technologies.
  • components within local network 110 can emulate GSM base stations, base station controllers, and mobile switching centers.
  • GSM global system for mobile communications
  • components within local network 110 can emulate GSM base stations, base station controllers, and mobile switching centers.
  • users of current GSM telephones can take advantage of embodiments consistent with the present invention without any changes to their handset.
  • Connected to local network 110 are a plurality of end terminals located throughout the facility. These end terminals include telephones, fax machines, computers, video conferencing systems and other communication devices. Preferably, one or more of these end terminals are located in a local desktop environment 120 provided in each office or workstation cubicle of the facility.
  • local network 110 routes the call or transmission to appropriate end terminals within local desktop environment 120. Since local network 110 is a computer voice/data network, the call or data transmission may be routed over a wireless or wireline communication channel to more than one end terminal (e.g., a speakerphone and a computer for a video conference) in local desktop environment 120. As illustrated in Fig. 1, local desktop environment 120 includes a computer 150, speakers 152, memory 154, a telephone 160, and a base station 170. One skilled in the art will appreciate that additional components may be added to local desktop environment 120, such as a fax machine or other peripheral device.
  • Computer 150 is preferably a desktop computer that includes a processor, a disk drive, input/output devices (e.g., a display, a keyboard, microphone, and a mouse), and a communication port for receiving and sending voice and data signals over local network 110.
  • Computer 150 is configured to support EP and CTI technology and thus, can receive calls via the Internet or an intranet.
  • Local desktop environment 120 also includes loudspeakers 152 which communicate with computer 150 to output audio signals.
  • speakers 152 output audio signals from a telephone call handed-off to computer 150 from wireless communication device 115. Speakers 152 may also be used for multimedia applications.
  • Memory 154 is random access memory (RAM) that stores data and software for computer 150.
  • memory 154 includes call management software 156 which is supported by the operating system of computer 150 and generates a graphical user interface on a display to output call information and other data.
  • the output of call information may include call time, call history, information about calling party (e.g., typically provided by contact management software), remote wireless network information, and any other data call management software 156 is configured to display.
  • call management software 156 may be used to display information regarding the transfer of data from wireless communication device 115 and computer 150 (e.g., calling directories, e-mail, voicemail, and other information).
  • call management software 156 can be downloaded from an Internet server as necessary to output call information and other data.
  • Telephone 160 is preferably a digital telephone that includes a wide range of features.
  • telephone 160 may include speakerphone functionality, as well as customized calling functions, such as call forwarding, call transferring, call conferencing, and call waiting. These functions would be programmed into telephone 160 and supported by local network 110.
  • Telephone 160 may be connected to local network 110 directly or through computer 150.
  • an existing wireless call may be automatically handed-off to telephone 160 without interruption when the wireless communication device is within a predetermined distance of local desktop environment 120.
  • Base station 170 supports an in-building wireless communication system and the hand-off of external calls thereto. Although base station 170 is shown as a stand alone unit in Fig. 1, one or more of its components may be integrated into the architecture of computer 150. Base station 170 may be configured to perform a variety of functions including proximity sensing and call routing. For example, base station 160 may be configured to sense whether a wireless communication device with an existing call is within a predetermined distance of local desktop environment 120. If this is determined, base station 170 can signal mobile switching center 136 to have the call handed-off to local desktop environment 120. To facilitate this operation, base station 170 includes a transceiver 172, a proximity sensor 174, a processor 176, and communication software 178.
  • Transceiver 172 sends voice and data signals to and receives voice and data signals from an external source, such as wireless communication device 115 and one of base transceiver stations 140, 142, and 144. These signals are communicated via antenna 180, and in certain circumstances, via a wireline connection through computer 150.
  • Proximity sensor 174 sends out pulse signals through transceiver 172 to sense whether a user of wireless communication device 115, on an existing call, has entered their office.
  • Wireless communication device 115 includes an identification code (used to identify itself to remote wireless network 105) that is detected by proximity sensor 174 when in range.
  • This detection can be accomplished by generating low power radio signals, using an infrared beam, or implementing other short-range communication technology that creates a signal which extends a predetermined distance away from local desktop environment 120.
  • This distance can be programmed by a network operator, for example, to extend between one meter and ten meters, depending on the size of the office. By programming each proximity sensor in this manner, a network operator can reduce the possibility of interference with other proximity sensors in a facility.
  • Processor 176 controls base station 170 and processes information sent to and received from an external source, such as wireless communication device 115 or one of the base transceiver stations. For example, once proximity sensor 174 detects wireless communication device 115, processor 176 processes and routes the identification code information to mobile switching center 136 to initiate call hand-off. Processor 176 implements communication software 178 to identify the type of wireless communication device and its associated remote wireless network. Mobile switching center 136 uses this information to contact the appropriate remote wireless network service to initiate call and call information hand-off
  • Fig. 2 is a flowchart of a method for automatically handing-off a call between a plurality of networks consistent with the present invention.
  • a call includes the hand-off of voice and/or data signals between two or more network terminals.
  • This method begins with detecting a wireless communication device within a predetermined distance from a reference point (step 200).
  • the reference point can be any one of a plurality of devices depending on the configuration of local network 110.
  • local desktop environment 120 can serve as a reference point when a wireless communication device user enters their office while on an existing call. In this instance, local desktop environment 120 identifies the wireless communication device as the user approaches.
  • the call is automatically handed-off to computer 150 (or another local desktop environment component) while the wireless communication device is within the predetermined range of base station 170 (step 220).
  • Figs. 3a and 3b illustrate two call hand-off system configurations for implementing embodiments consistent with the present invention. The details of the call hand-off are explained below in connection with Fig. 4.
  • Fig. 3a illustrates what happens in handing-off an existing call to local network 110 as a user with a wireless communication device enters a building.
  • Fig. 3b illustrates what happens in handing- off an existing call to local desktop environment 120 as a user of a wireless communication device enters an office.
  • additional configurations may be used to seamlessly hand-off an existing call between a plurality of networks consistent with the present invention.
  • a user with a wireless communication device 115 enters a building 300, having local network 110, while on an existing call.
  • the existing call is serviced by remote wireless network 105 while the user is outside of building 300.
  • local network 110 serving as a reference point, detects wireless communication device 115 via antenna 148 using one or more proximity sensors located, for example, at the entrances of building 300.
  • Local network 110 captures the identification code of wireless communication device 115 and uses this information to hand-off the call from remote wireless network 105 to an in-building wireless system supported by local network 110.
  • the existing call is handed-off to local network 110, it can then be routed to any local desktop environment within building 300.
  • the number of wireless communication channels available to local network 110 may vary based on the available bandwidth of the system. However, as users leave building 300, the calls are transferred back to remote wireless network 105 and additional wireless communication channels become available for other users.
  • Fig. 3b illustrates a user entering an office 320 with local desktop environment 120.
  • the user of wireless communication device 115 remains connected with remote wireless network 105 until reaching his or her office in building 300.
  • the wireless communication device is detected and identified by base station 170 via antenna 180.
  • the display screen of computer 150 becomes active and shows the status of the automatic call hand-off between remote wireless network 105 and local network 110.
  • the user can listen to the existing call while viewing call-related information through the call management software 156 interface on computer 150 described in further detail below.
  • Local desktop environment 120 automatically hands-off the call back to remote wireless network 105 and wireless communication device 115 without any interruption in service when the user leaves office 320 (i.e., moves out of radio range).
  • Fig. 4 is a flowchart of a method for switching a call between a plurality of networks consistent with the present invention.
  • the method of Fig. 4 begins with the step of detecting a wireless communication device within a predetermined range of a reference unit (step 400). As stated above, this detection may occur when a wireless communication device user enters their building or office while engaged in an existing call.
  • the reference unit may be local network 110 or local desktop environment 120 depending on the building network configuration.
  • the next step is identifying the wireless communication device and its supporting network (step 420).
  • This step involves reading the identification code of the wireless communication device.
  • local network 110 (or local desktop environment 120) can identify the remote wireless network supporting wireless communication device 115, that is, whether the remote wireless network is a PCS network, AMPS network, or other wireless network.
  • local network 110 sends a request to remote wireless network 105 to hand-off the call to that network (step 440).
  • the request includes the identification code of wireless communication device 115 and telephone number or IP address of local network 110.
  • Remote wireless network 105 receives the request from local network 110 and hands-off the call (step 460). To ensure the call is not interrupted, the hand-off is instantaneous, by routing the call immediately through PSTN 125 to local network 110. Since local network 110 is a computer data/voice network, it can receive calls and data transmission using IP protocol. In this instance, the call or data files can be handed-off to local network 110 via the Internet and ultimately routed to local desktop environment 120.
  • the user can view call information through the call management software 156 interface and listen to an audio portion of the call through speakers 152 or through a wireless communication device.
  • the user can also pre-configure the audio and visual functions of local desktop environment 120 or set these functions during the call.
  • One advantage of this configuration is hands-free operation. That is, the user can configure local desktop environment 120 in a manner that doesn't require holding the communication device or other equipment.
  • the user can hang-up on wireless communication device 115 or through the call management software 156 interface. If the user initiates a call on computer 150 and has to leave the office during the call, local network 110 can hand-off the call back to remote wireless network 105 and wireless communication device 115 by modifying the steps illustrated in Fig. 4. As the user leaves the office (or building), proximity sensor 174 detects wireless communication device 115 moving away from local desktop environment 120, and local network 110 communicates with remote wireless network 105 to hand-off the call.
  • a signal (e.g., a beeping tone) can be sent to wireless communication device 115 by remote network 105 to alert the user of the call hand-off The call is then automatically switched to remote wireless network 105 and wireless communication device 115 before the user leaves the radio range of base station controller 170. This feature allows the user to move in and out of their office (or building) while on an existing call without any interruption in service.
  • Embodiments consistent with the present invention provide increased mobility and versatility over conventional communication systems.
  • a user can simply walk in and out of their office or building while on a call without interruption in service.
  • the transparent and automatic hand-off of the call between networks provides this convenient functionality.
  • embodiments consistent with the present invention allow a user transfer data between networks to consolidate communication information, such a calling directories and e-mail. This feature creates multiple user control points for accessing data existing on different networks. While only some embodiments consistent with the present invention have been described, those skilled in the art will understand that various changes and modifications may be made to these embodiments, and equivalents may be substituted for elements in these embodiments, without departing from the true scope of the invention.

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

Abstract

Systèmes et procédés qui basculent automatiquement des appels et des informations sur les appels de façon continue, entre un dispositif de communication portatif en communication avec un réseau distant et un point de référence en communication avec un réseau local. Un dispositif de détection local détecte un dispositif de radiocommunication lorsque ce dernier se situe dans les limites d'une certaine portée par rapport au point de référence et émet un signal à un central pour que ce dernier initie un basculement, du réseau distant au réseau local. Lorsque le dispositif de radiocommunication s'éloigne du point de référence, l'appel est automatiquement renvoyé vers le réseau distant.
PCT/IB1999/001790 1998-11-09 1999-11-08 Systeme et procede pour diriger, garder et distribuer des appels et echanger des informations entre reseaux Ceased WO2000028762A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU63622/99A AU6362299A (en) 1998-11-09 1999-11-08 System and method for controlling, maintaining and sharing calls and call data between networks

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US18817998A 1998-11-09 1998-11-09
US09/188,179 1998-11-09

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Publication Number Publication Date
WO2000028762A1 true WO2000028762A1 (fr) 2000-05-18

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FR2825869A1 (fr) * 2001-06-08 2002-12-13 France Telecom Procede d'authentification entre un objet de telecommunication portable et une borne d'acces public
WO2002054820A3 (fr) * 2000-12-28 2003-03-13 Symbol Technologies Inc Itinerance verticale automatique sans coupure entre reseaux locaux sans fil et reseaux longue portee sans fil
WO2003065756A3 (fr) * 2002-01-31 2003-10-02 Motorola Inc Procede permettant de maintenir la communication avec un dispositif
WO2006006115A1 (fr) * 2004-07-09 2006-01-19 Koninklijke Philips Electronics N.V. Procedes et circuits permettant de se deplacer entre differents reseaux
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