[go: up one dir, main page]

WO2001031963A1 - Transfert de terminal mobile d'un reseau de deuxieme generation vers un reseau ip de troisieme generation - Google Patents

Transfert de terminal mobile d'un reseau de deuxieme generation vers un reseau ip de troisieme generation Download PDF

Info

Publication number
WO2001031963A1
WO2001031963A1 PCT/SE2000/002008 SE0002008W WO0131963A1 WO 2001031963 A1 WO2001031963 A1 WO 2001031963A1 SE 0002008 W SE0002008 W SE 0002008W WO 0131963 A1 WO0131963 A1 WO 0131963A1
Authority
WO
WIPO (PCT)
Prior art keywords
mobile terminal
network
handing over
handover
service
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/SE2000/002008
Other languages
English (en)
Inventor
Suhail Hasan
David Sugirtharaj
Hung Tran
Ibrahim Ozkan
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.)
Telefonaktiebolaget LM Ericsson AB
Original Assignee
Telefonaktiebolaget LM Ericsson AB
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 Telefonaktiebolaget LM Ericsson AB filed Critical Telefonaktiebolaget LM Ericsson AB
Priority to AU13172/01A priority Critical patent/AU1317201A/en
Priority to EP00975069A priority patent/EP1240795A1/fr
Publication of WO2001031963A1 publication Critical patent/WO2001031963A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0011—Control or signalling for completing the hand-off for data sessions of end-to-end connection
    • H04W36/0022—Control or signalling for completing the hand-off for data sessions of end-to-end connection for transferring data sessions between adjacent core network technologies
    • H04W36/00224—Control or signalling for completing the hand-off for data sessions of end-to-end connection for transferring data sessions between adjacent core network technologies between packet switched [PS] and circuit switched [CS] network technologies, e.g. circuit switched fallback [CSFB]
    • H04W36/00226—Control or signalling for completing the hand-off for data sessions of end-to-end connection for transferring data sessions between adjacent core network technologies between packet switched [PS] and circuit switched [CS] network technologies, e.g. circuit switched fallback [CSFB] wherein the core network technologies comprise IP multimedia system [IMS], e.g. single radio voice call continuity [SRVCC]
    • 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
    • H04W36/26—Reselection being triggered by specific parameters by agreed or negotiated communication parameters

Definitions

  • This invention relates to telecommunication systems and, more particularly, to a method of handing over a mobile terminal from a second generation (2G) circuit- switched network to a third generation (3G) Internet Protocol (IP)-based network.
  • 2G second generation
  • 3G third generation
  • IP Internet Protocol
  • the third generation IP group (3G.IP) is a focus group that develops technical solutions for IP -based networks that will be introduced into the Third Generation
  • MTs Mobile terminals
  • RAN Radio Access Network
  • 3G.PP are the Enhanced Date Rates for General Packet Radio Service (EDGE) or the
  • Universal Mobile Telecommunication System UMTS
  • the call control protocol may be either H.323 or the Session Initiation Protocol (SIP) to support real-time multimedia traffic.
  • IP Session Initiation Protocol
  • 3G.PP requires 3G networks to support new and existing services in such a way as to provide interworking of the services with other 3G networks and also with legacy second generation (2G) networks. These services may include, for example, speech, data, multimedia, Short Message Service (SMS), supplementary services,
  • SMS Short Message Service
  • VHE Virtual Home Environment
  • new IP-based services such as email, etc.
  • 3G.PP requires the provisioning of handover of ongoing voice-only calls from a 2G system to a 3G system.
  • MSs It is desirable for MSs to be able to roam freely, back and forth between older 2G networks and new 3 G networks.
  • the present invention provides such a method.
  • the invention is applicable to Class B MSs that can utilize either the packet-switched 3 G network or the circuit-switched 2G network at any given time, but not simultaneously.
  • the present invention is a method of handing over a mobile terminal from a first cell to a second cell of the type in which the first cell is in a first type of network, and the second cell is in a second type of network.
  • the improvement provided by the present invention is that the handover is triggered not just by the availability of service by the second type of network, or by a stronger signal strength from the second type of network, but also by a request for a service that requires a capability of the second type of network.
  • the first type of network is a second generation (2G) circuit-switched radio telecommunications network
  • the second type of network is a third generation (3G) Internet Protocol (IP)-based radio telecommunications network.
  • the present invention is a method of handing over a mobile terminal from a 2G circuit-switched radio telecommunications network to a 3G IP- based radio telecommunications network.
  • the method includes the steps of establishing a call from the mobile terminal in the 2G network, determining that the mobile terminal is operating in an area of 3G network coverage, preregistering the mobile terminal with the 3G network, determining that the mobile terminal is requesting a service that requires 3G network coverage, and handing over the mobile terminal from the 2G network to the 3G network.
  • Preregistration of the mobile terminal may include acquiring an IP address for the mobile terminal, acquiring a
  • the present invention is a method of handing over a mobile terminal from a 2G Anchor Mobile Switching Center (MSC) in a 2G circuit- switched radio telecommunications network to a SGSN in a 3G EP -based radio telecommunications network.
  • MSC 2G Anchor Mobile Switching Center
  • the method includes the steps of detecting by the mobile terminal that coverage is available from a target cell in the 3G network, preregistering the mobile terminal with the 3G network, determining whether the mobile terminal is requesting a service that requires 3G network coverage, retaining the mobile terminal in the 2G network if the mobile terminal is not requesting a service that requires 3 G network coverage, and handing over the mobile terminal from the 2G network to the 3G network if the mobile terminal is requesting a service that requires 3G network coverage.
  • FIG. 1 is an illustrative drawing of a broad area of 2G coverage in which smaller pockets of 3G coverage have been deployed;
  • FIG. 2 is an illustrative drawing of a 2G protocol stack and a 3G protocol stack in a dual-stack mobile terminal suitable for use with the method of the present invention
  • FIGS. 3A-3C are a message flow diagram illustrating the messages, message content, and functions performed by network elements during a 2G-to-3G handover in accordance with the teachings of the present invention.
  • the present invention is a method of handing over a mobile terminal from a second generation (2G) circuit-switched network to a third generation (3G) all IP- based network.
  • Handover from a 2G system to a 3G system is inherently more complicated than a 3G-to-2G handover.
  • MTs operating in 2G circuit-switched systems utilize a circuit-switched protocol layer and deal only with a circuit-switched architecture.
  • GGSN Gateway GPRS Service Node
  • SGSN Serving GPRS Service Node
  • MM Mobility Management
  • the critical factor triggering a 2G-to-3G handover is whether the user requires 3G services. If the user is just using speech services during and after a proposed handover to a 3G system, the benefit of setting up a PDP Context and CSCF registration may not be worth the effort, both to the caller and to the carrier.
  • the decision to handover from 2G-to-3G is based primarily on the type of services required, rather than merely the availability of 3G coverage. If the PLMN operator can provide value added services such as concurrent ongoing speech along with email access and Wireless Application Protocol (WAP) service, the 2G-to-
  • WAP Wireless Application Protocol
  • 3G handover becomes a cost-effective procedure.
  • This invention solves complex issues involved in moving from a 2G call- control system to a 3G call-control system where an IP address, a call state control function (CSCF) transport address, and registration to that CSCF are required before successful handover can be achieved.
  • Preregistration toward the 3G system including the provisioning of an IP address for the MT, an IP address for the CSCF, choice of a GGSN and an SGSN, and the pre-building of a PDP Context before the actual handover is used to minimize delays during the handover.
  • FIG. 1 illustrates an initial 3G deployment scenario in which there are pockets of 3G coverage 11 within a broader area of 2G coverage 12. It may be reasonably assumed that initial 3G deployment will be in "islands" of 3G coverage within an already installed 2G coverage area. As shown in FIG. 1 , this implies that a dual-stack mobile terminal (MT) 13 may initially register and launch a voice call in a 2G coverage area. As the caller enters an area of 3G coverage, the decision to perform a handover must be made. In the present invention, this decision is based, not just on the availability of 3G coverage, but also on the service requirements of the user.
  • MT dual-stack mobile terminal
  • the need to check email, or to upgrade to a multimedia call may trigger a 2G- to-3G handover if the MT is in a 3G coverage area.
  • a Home Location Register/Home Subscriber Server (HLR/HSS) 14.
  • the HLR/HSS verifies that the user has a 3G subscription, and chooses an Anchor GGSN and a properly located SGSN to service the MT after the handover.
  • FIG. 2 is an illustrative drawing of a 2G protocol stack and a 3G protocol stack in a dual-stack MT 13 suitable for use with the method of the present invention.
  • the stacks may share a physical layer 16, or the physical layer may be separated.
  • the 3G stack may use Wideband Code Division Multiple Access (WCDMA) while the 2G stack uses GSM.
  • WCDMA Wideband Code Division Multiple Access
  • GSM Global System for Mobile Communications
  • codec GSM coder/decoder
  • the 3G stack is slightly more complex and includes, above the physical layer, a Medium Access Control (MAC) protocol 19 and, at the link layer, a Radio Link Control (RLC) protocol 21 and a Packet Data Control Protocol (PDCP) 22.
  • MAC Medium Access Control
  • RLC Radio Link Control
  • PDCP Packet Data Control Protocol
  • IP Internet Protocol
  • the MAC layer interacts with a service trigger layer 24.
  • the present invention introduces service triggers 24 to determine when 2G-to- 3G handover is required. If a call starts in the 2G system where there is no 3G coverage, a decision to handover to a 3G system is based not just on the availability of 3G coverage, but also on the type of services required by the user, such as multimedia or WAP service. For example, a subscriber is running a real-time application on a laptop, and connects the laptop to the MS.
  • the service trigger determines the service requirement and launches an appropriate call, in this case a 3G session (i.e., the service requirement drives the need for a 2G call or a 3G session). Because of the complexity of the 2G-to-3G handover, the system only goes to 3G if the service requirements demand it.
  • a subscriber is traveling, for example, on a train.
  • the subscriber turns on his MT and attempts to start a multimedia session that requires multiple bearers in a 3G network.
  • the MT scans for 3G coverage, but there is none available, so the MT manages only to seize the voice bearer in the 2G network.
  • the subscriber makes a 2G voice call.
  • the subscriber enters an area of 3G coverage, and the MT detects a 3G signal above a minimum attenuation level.
  • Handover is performed for the voice call, and the 3G service trigger launches preregistration toward the 3G system for the multimedia session. Doppler analysis may be performed to verify that the subscriber is traveling toward the 3 G system rather than tangentially or away from the 3G system. Preregistration is performed prior to requesting a 2G-to-3G handover in order to minimize the time required for the handover. Additionally, this process is consistent with the 3G.IP philosophy of maintaining separation of the user plane (media) and the control plane (control signaling).
  • the multimedia application can seize another bearer for the video, providing the subscriber with the desired multimedia session.
  • VoIP Voice-over-IP
  • the MT In basic Voice-over-IP (VoIP) protocols such as H.323 or SIP, the MT must have an IP address and have a full IP stack running. In addition, the MT must have a Gatekeeper with a CSCF. Therefore, since the exemplary scenario involves handover to a 3G system, the HLR selects an SGSN or GGSN ahead of time for the call. It should be noted that the same basic procedures may be applied to a Code Division Multiple Access (CDMA) packet-based system in which a Packet Data Service Node (PDSN) is implemented instead of an SGSN or a GGSN.
  • CDMA Code Division Multiple Access
  • PDSN Packet Data Service Node
  • the present invention also introduces a Handover Server (HOSV).
  • the HOSV maybe implemented as a stand-alone node or in a node hierarchically at the same level as an MSC or SGSN, and which includes Handover Server Functionality.
  • IMSI International Mobile Subscriber Identity
  • the HOSV is provided with the MT's International Mobile Subscriber Identity (IMSI) and its IP address, etc. and makes sure that the 3G session is ready to launch by creating PDP contexts and performing CSCF registration for the MT.
  • IMSI International Mobile Subscriber Identity
  • the HOSV is needed for backward compatibility purposes with 2G nodes such as the Anchor Mobile Switching Center (MSC).
  • MSC Anchor Mobile Switching Center
  • there is an Anchor MSC where the call is initially served.
  • the Anchor MSC exchanges information with later-serving MSCs in a Prepare Handover message, and expects to receive Prepare Handover responses.
  • the HOSV receives the Prepare Handover message and ensures that the expected responses are
  • PPP Point-to-Point Protocol
  • TE Terminal Equipment
  • MT Terminal Equipment
  • 3A-3C are a message flow diagram illustrating the messages, message content, and functions performed by network elements during a 2G-to-3G handover in accordance with the teachings of the present invention.
  • Participating nodes in the network include the terminal equipment (TE) 31, the MT 13, a serving Universal Transmission Radio Access Network (UTRAN) 32, an SGSN 33, a GGSN 34, an HOSV 35, a CSCF 36, a Media Gateway Control Function (MGCF) 37, the HLR 14, a Media Gateway (MGW) 38, an MSC 39, and a Base Station Controller (BSC) 40.
  • a 2G GSM IMSI Attach message 41 is sent to the MSC 39.
  • the message is passed to the HLR, and a 2G call is set up.
  • the MT periodically scans for an indication of available 3G coverage. When 3G coverage is detected, the MT sends a 2G Direct Transfer Application Part
  • DTAP DTAP message 44 to the MSC and includes the MT's IMSI and the Cell ID of the target 3G cell.
  • the DTAP protocol is used to transfer call control, supplementary services management, and mobility management messages.
  • the MSC sends a new 2G Mobile Application Part (MAP) message called the "3G Handover" (3G HO) message 45 to the HLR based on the MSI of the MT.
  • MAP 2G Mobile Application Part
  • 3G HO 3G Handover
  • the 3G HLR HLR/HSS
  • HLR checks the MT's subscriber profile to verify that the subscriber has a 3G subscription.
  • the HLR chooses an Anchor GGSN at 47 based on the Access Point Name (APN) and the IMSI.
  • the APN indicates the subscriber's home ISP and home Public Land Mobile Network (PLMN), and thus the GGSN 34 can be identified.
  • PLMN Public Land Mobile Network
  • the SGSN is chosen through a location analysis based on the target 3G cell where the MT is receiving the strongest 3G signal. If the true SGSN/Routing Area turns out to be different, RNS relocation type of signaling may be utilized.
  • the HLR requests the provisioning of a IP address for the MS by sending a Build 3G PDP Context message to the GGSN 34.
  • the Build 3G PDP Context message includes the MS's IMSI and MSISDN, the chosen SGSN, a target Routing Area, and an IP address request.
  • the GGSN provides a dynamic IP address for the MT.
  • the GGSN contains a Network Access Server (NAS) which provides dynamic IP addresses using the methodology in GSM 09.61 General Packet Radio Service (GPRS) or UMTS 29.061.
  • GPRS General Packet Radio Service
  • UMTS 29.061 UMTS 29.061.
  • the GGSN may provide the address itself or obtain an address from a Radius server.
  • the GGSN provides the dynamic IP address to the CSCF in a proxy 3G CSCF registration process 51.
  • the Anchor GGSN and the CSCF are provided with information elements that include the MT's SI, IP address and MSISDN.
  • a Handover flag is also sent to the CSCF.
  • the information elements should include fast start parameters such as an Initial Logical Channel based on the original service triggers.
  • the GGSN then informs the HLR in a Build 3G PDP Context Acknowledgment message 52 of the chosen gatekeeper (CSCF#) and the assigned IP address.
  • CSCF# chosen gatekeeper
  • a PLMN may have multiple CSCFs, and the choice of the CSCF by the GGSN may be by one of several different methodologies such as weighted average or load sharing.
  • the GGSN then sends an Update PDP Context message 53 to the SGSN 33 to inform the SGSN of the MT's IP address.
  • a PDP Context must be established for any packet data flow, therefore a PDP Context record must be established in both the SGSN and the GGSN.
  • the message also includes an initial Network-level Service Access Point Interface (NSAPI-1).
  • the NSAPI is a GPRS-specific service access point (for services provided by the SNDCP layer 22) on top of which the IP stack resides. All IP datagrams flow down the protocol layers through the NSAPI. While the MT is involved in a strictly 2G call, there is no packet data stack with an IP address and an associated NSAPI.
  • the NSAPI must be provided to the MT by the network along with an IP address and a Gatekeeper address to create a firm binding between a dynamically generated 3G terminal and the mobile.
  • the NSAPI-1 is used along with the MT's MSI to build a unique 3G Tunnel ID (TID) for the MT.
  • the SGSN creates an initial Mobility Management (MM) Context.
  • the GGSN sends an Update HOSV message to the HOSV 35, and includes the IMSI, Anchor GGSN, SGSN, and CSCF IP address.
  • the HOSV is on the same level as an MSC.
  • a 2G MAP 3G HO Acknowledgment message 55 is sent from the HLR to the MSC, and includes the assigned IP address, NSAPI-1, and the CSCF IP address as an optional information element.
  • the MSC then sends a 2G DTAP
  • Acknowledgment message 56 to the MT includes the assigned IP address, NS API- 1 , and the CSCF along with 3G service-dependent parameters such as the RTP Logical Channels (LCN).
  • a PPP LCP/NCP link 57 is then established between the MT and the TE, and the above parameters and information elements are used for launching a TCP/IP-based 3G stack. The process then moves to FIG. 3B.
  • a measurement report 58 sent to the BSC causes the BSC to send a Handoff Required message 59 to the MSC indicating that handoff is required, and including a target cell for handoff.
  • the service trigger 24 in the MT can force a handoff to a 3G cell.
  • the MSC becomes an Anchor MSC, but instead of passing the MT to another MSC, it passes the MT to the HOSV 35. Thus, the MSC sends the target cell to the
  • the HOSV in a Prepare Handover Request message 61.
  • the HOSV generates a handover number.
  • the HOSV sends a Relocation Request 63 to the SGSN which was chosen previously for the MT's MSI.
  • the Relocation Request includes information elements for MM and PDP Contexts. This prepares the SGSN for handover.
  • the SGSN relays the Relocation Request to the serving UTRAN 32.
  • the UTRAN sets up bearer channels on the radio side at 65 using the Access Link Control Application Part (ALCAP) protocol.
  • ALCAP is a transport signaling protocol used in UMTS to set up and tear down transport bearers on the Iu, Iur, and Iub interfaces.
  • the UTRAN then sends back a Relocation Request Acknowledgment message 66 to the SGSN.
  • the SGSN forwards the Relocation Request Acknowledgment to the HOSV at 67.
  • the HOSV sends a new 3G call control message such as a Facility (or Setup) message 68 (H.225 or SEP) to the CSCF in the Gatekeeper indicating that handover is in progress.
  • This message provides the CSCF with the handover number and the IP address of the MT which has already been received by the MT.
  • Gatekeeper is informed by the HOSV that it is getting a call from the MT.
  • the gateway has been broken into two parts: the MGCF 37 and the MGW 38. There can be several MGWs controlled by one MGCF for scalability. The MGCF can also pick which MGW it wants.
  • the Gatekeeper CSCF sends a Facility message 69 to the MGCF indicating that there is a handover in progress. Facility Acknowledgment messages 71 and 72 are then returned to the CSCF and the HOSV. The HOSV then sends a Prepare Handover Response message 73 to the MSC with a handover number. The HOSV also indicates that the ISUP messaging should go to the MGCF.
  • the MSC then sends an ISUP Initial Address Message (IAM) 74 to the MGCF and includes the handover number, Carrier Identification Code (CIC) number, and the Destination Point Code (DPC) of the MGCF.
  • IAM ISUP Initial Address Message
  • CIC Carrier Identification Code
  • DPC Destination Point Code
  • the MGCF matches the handover number with the handover number received in the Facility message 69 to determine which CSCF sent it.
  • the MGW returns a CTX Response OK message 77, and the process then moves to FIG. 3C.
  • the MGCF then sends a Facility Redirect message 78 to the CSCF, and the message is forwarded to the HOSV at 79.
  • This message informs the CSCF and the HOSV that the Megaco termination for this particular call has been set up.
  • the HOSV then sends a Call Proceeding message 81 to the CSCF, and the message is forwarded to the MGCF at 82.
  • These messages must go through the CSCF because the HOSV is acting as a proxy for the MT.
  • An ACM message 83 is then sent from the MGCF to the MSC, and the MSC sends a Handover Command 84 to the BSC.
  • the BSC then sends a Relocation Command 85 to the MT.
  • the call is then switched to the 3G system at 86.
  • a Relocation Detect message 87 is sent from the MT to the HOSV via the serving UTRAN and the SGSN. Alerting is performed as normal, and the HOSV sends an Alerting signal 88 to the MGCF via the CSCF.
  • Call Proceeding (CPG) is sent as normal from the MGCF to the MSC at 89.
  • 91 is then sent from the MT to the HOSV via the serving UTRAN and the SGSN.
  • the HOSV sends a MAP Send End Signal Request as normal to the MSC.
  • a Clear command is sent between the MSC and the BSC.
  • the MT notifies the TE that full 3G coverage is provided, and the protocol stack is switched to the 3G stack at 95.
  • a Facility Call Reconnect message 96 is then sent from the MT directly to the CSCF to demonstrate that the MT can talk to the CSCF directly.
  • the CSCF then sends a Modify Call Context (CTX) message 97 to the MGCF, and the MGCF forwards the message to the MGW.
  • CX Modify Call Context
  • the MGW returns a CTX Response OK message to the MGCF.
  • an Answer Message (ANM) 99 is sent from the MGCF to the MSC indicating that the call is in progress, and diverting the 2G speech circuit towards the MSC.

Landscapes

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

Abstract

L'invention concerne un procédé de transfert d'un terminal mobile, d'un centre de commutation mobile (MSC) (39) d'origine de deuxième génération (2G) d'un réseau de radiotélécommunication à commutation de circuits 2G vers un noeud de services (SGSN) (33) d'un service général de radiocommunication à commutation par paquets (GPRS) de desserte de réseau de radiotélécommunication à protocole Internet (IP) de troisième génération (3G). Le transfert est déclenché non seulement selon la disponibilité du service par le réseau 3G, ou par une puissance supérieure du signal provenant du réseau 3G, mais aussi par une demande de service exigeant une couverture 3G. Afin de réduire des retards potentiels de transfert, le terminal mobile est préenregistré auprès du réseau 3G lorsqu'une couverture 3G est détectée (44). Un serveur de transfert (HOSV) (35) est mis en place au même niveau hiérarchique que le MSC ou le SGSN. Le HOSV maintient une compatibilité descendante avec le MSC 2G au cours de la procédure de transfert.
PCT/SE2000/002008 1999-10-29 2000-10-17 Transfert de terminal mobile d'un reseau de deuxieme generation vers un reseau ip de troisieme generation Ceased WO2001031963A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
AU13172/01A AU1317201A (en) 1999-10-29 2000-10-17 Mobile terminal handover from a second generation network to a third generation ip-based network
EP00975069A EP1240795A1 (fr) 1999-10-29 2000-10-17 Transfert de terminal mobile d'un reseau de deuxieme generation vers un reseau ip de troisieme generation

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US16253299P 1999-10-29 1999-10-29
US60/162,532 1999-10-29
US58546400A 2000-06-01 2000-06-01
US09/585,464 2000-06-01

Publications (1)

Publication Number Publication Date
WO2001031963A1 true WO2001031963A1 (fr) 2001-05-03

Family

ID=26858838

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE2000/002008 Ceased WO2001031963A1 (fr) 1999-10-29 2000-10-17 Transfert de terminal mobile d'un reseau de deuxieme generation vers un reseau ip de troisieme generation

Country Status (4)

Country Link
EP (1) EP1240795A1 (fr)
AR (1) AR029010A1 (fr)
AU (1) AU1317201A (fr)
WO (1) WO2001031963A1 (fr)

Cited By (55)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001072076A1 (fr) * 2000-03-21 2001-09-27 Nokia Corporation Transfert intercellulaire dans un reseau du type a porteuses multiples
EP1182900A1 (fr) * 2000-08-07 2002-02-27 Lucent Technologies Inc. Transfert d'appels sans fil entre des systèmes supportant des modèles d'appel à commutation par circuits et à commutation par paquets
WO2002003720A3 (fr) * 2000-07-03 2002-05-02 Ericsson Telefon Ab L M Systeme et procedes permettant de realiser un transfert entre un environnement de commutation par circuits et un environnement de commutation par paquets
WO2002093966A1 (fr) * 2001-05-14 2002-11-21 Telefonaktiebolaget Lm Ericsson Procede de synchronisation d'une pluralite de reseaux
WO2003053091A1 (fr) * 2001-12-18 2003-06-26 Nokia Corporation Transfert intersysteme d'un terminal mobile
WO2003075596A1 (fr) * 2002-03-07 2003-09-12 Nokia Corporation Attribution d'une s-cscf a un abonne
WO2003084261A1 (fr) * 2002-04-03 2003-10-09 Nokia Corporation Validation de la distribution de contenu initiee par un fournisseur de contenu via un reseau d'acces radio specifique
EP1397016A1 (fr) * 2002-09-09 2004-03-10 Nec Technologies (UK) Limited Procédé de commutation automatique d'un terminal bimode
EP1339250A3 (fr) * 2002-02-06 2004-03-31 DoCoMo Communications Laboratories USA, Inc. Usage les relations de sous-réseaux pour appels, authentification, association et pour activer des interfaces de réseau dans réseaux d'accès hétérogènes
FR2846172A1 (fr) * 2002-10-21 2004-04-23 Nec Technologies Uk Ltd Procede de commutation automatique d'un terminal bimode
WO2004056150A1 (fr) * 2002-12-17 2004-07-01 Nokia Corporation Changement sans coupure de reseau d'acces radio dependant de la qualite de service (qos) requise
WO2004057815A2 (fr) 2002-12-18 2004-07-08 Qualcomm, Incorporated Protocole hybride destine a prendre en charge des communications avec des reseaux multiples
FR2850518A1 (fr) * 2003-01-29 2004-07-30 Evolium Sas Procede pour l'acces simultane a des services circuit et a des services paquet dans un systeme cellulaire de radiocommunications mobiles
EP1503606A1 (fr) * 2003-07-31 2005-02-02 Siemens Mobile Communications S.p.A. Procédé de gestion des ressources de radio communes dans un réseau de téléphone cellulaire multi-rat
WO2005002267A3 (fr) * 2003-06-30 2005-03-10 Nokia Corp Methode d'optimisation du transfert entre reseaux de communications
US6907028B2 (en) 2002-02-14 2005-06-14 Nokia Corporation Clock-based time slicing
FR2865599A1 (fr) * 2004-01-22 2005-07-29 Nortel Networks Ltd Procede de gestion de communications, systeme de telecommunication pour mettre en oeuvre le procede et equipements associes
EP1526752A3 (fr) * 2002-02-06 2005-08-10 DoCoMo Communications Laboratories USA, Inc. Usage les relations de sous-réseaux pour authentification, association et pour activer des interfaces de réseau dans réseaux d'accès hétérogènes
EP1525676A4 (fr) * 2002-07-02 2005-11-02 Interdigital Tech Corp Procede et appareil de transfert entre un reseau local sans fil (wlan) et un systeme universel de telecommunication mobile (umts)
EP1504551A4 (fr) * 2002-05-10 2005-11-30 Qualcomm Inc Transfert dans un reseau de communication hybride
WO2005114875A1 (fr) * 2004-04-22 2005-12-01 Sk Telecom Co., Ltd. Systeme et procede de communication mobile permettant le transfert par paquets entre un reseau de communication asynchrone et un reseau de communication synchrone, et terminal de communication mobile utilise a cet effet
EP1608189A1 (fr) * 2004-06-18 2005-12-21 Lucent Technologies Inc. Procédé et dispositif pour reduire le temps d'attente pendant un changement de cellule dans un système de communication
WO2006006015A1 (fr) * 2004-06-28 2006-01-19 Nokia Corporation Procede et appareil assurant le transfert des contextes lors des transferts entre reseaux pdsn dans un systeme de communications sans fil
EP1650998A1 (fr) * 2004-10-20 2006-04-26 TeliaSonera Finland Oyj Reacheminement d'une appel d'un réseau à commutation de circuit
EP1551200A3 (fr) * 2003-12-30 2006-05-10 Nokia Corporation Procédé, système et programme pour contrôler les ressources dans un système de télécommunications sans fil
US7058034B2 (en) 2002-09-09 2006-06-06 Nokia Corporation Phase shifted time slice transmission to improve handover
WO2006064390A3 (fr) * 2004-12-13 2006-08-31 Koninkl Philips Electronics Nv Procede et appareil pour garantir la qualite de service lors d'un transfert intercellulaire
WO2006095994A1 (fr) * 2005-03-07 2006-09-14 Lg Electronics Inc. Fourniture d'informations de protocole de gestion de mobilite a un terminal mobile pour effectuer un transfert dans un systeme de communication mobile
WO2006109182A1 (fr) * 2005-04-12 2006-10-19 Nokia Corporation Selection d'une entite de reseau
US7130313B2 (en) 2002-02-14 2006-10-31 Nokia Corporation Time-slice signaling for broadband digital broadcasting
WO2007080444A1 (fr) * 2005-10-07 2007-07-19 Alcatel Lucent Procédé et dispositif facilitant le transfert d'une radiocommunication dans un système de radiocommunication cellulaire
WO2007099437A1 (fr) * 2006-02-28 2007-09-07 Nokia Corporation Transfert intercellulaire dans des reseaux de communication
CN100337487C (zh) * 2003-08-04 2007-09-12 华为技术有限公司 一种移动通信系统中物理信道资源的配置方法
WO2007144027A1 (fr) * 2006-06-16 2007-12-21 Telefonaktiebolaget Lm Ericsson (Publ) Commande de transfert dans un réseau mobile
WO2008022069A1 (fr) * 2006-08-15 2008-02-21 Alcatel Lucent Commutation entre des réseaux à commutation de circuits et à commutation de paquets
WO2007124306A3 (fr) * 2006-04-19 2008-03-06 Qualcomm Inc Procede et appareil pour l'ancrage dynamique des appels cs lors des transferts intercellulaires 'cs vers voix sur ip'
CN100379302C (zh) * 2002-08-15 2008-04-02 汤姆森特许公司 移动终端用户从无线电话网络切换到无线局域网的技术
CN100388810C (zh) * 2005-01-11 2008-05-14 华为技术有限公司 一种实现第三代移动通信系统视频业务的方法
CN100397922C (zh) * 2006-06-02 2008-06-25 中国移动通信集团公司 呼叫业务的重试连接方法
WO2008125067A1 (fr) * 2007-04-17 2008-10-23 Huawei Technologies Co., Ltd. Procédé et dispositif permettant d'assurer la continuité de données vocales au cours d'une session
CN100438359C (zh) * 2002-12-30 2008-11-26 Sk电信有限公社 通过限制1xev-do系统通信状态期间对1x系统的搜索时间来防止呼叫撤销的方法和系统
WO2008148430A1 (fr) 2007-06-08 2008-12-11 Telefonaktiebolaget Lm Ericsson (Publ) Transfert d'un domaine à commutation de circuit à un service à commutation de circuit sur un domaine à commutation de paquet
CN100466797C (zh) * 2006-10-16 2009-03-04 中国移动通信集团公司 移动通信系统间负荷分担的方法
WO2009026835A1 (fr) 2007-08-23 2009-03-05 Huawei Technologies Co., Ltd. Système, appareil et procédé pour un transfert de service d'utilisateur
WO2010003501A2 (fr) 2008-06-17 2010-01-14 Alcatel Lucent Indication explicite de porteuses soumises à la continuité d’une communication vocale
US7660583B2 (en) 2004-03-19 2010-02-09 Nokia Corporation Advanced handover in phased-shifted and time-sliced networks
US7706336B2 (en) * 2001-02-28 2010-04-27 Motorola, Inc. Mobile station architectures for circuit and packet modes and methods therefor
US7844214B2 (en) 2002-03-02 2010-11-30 Nokia Corporation System and method for broadband digital broadcasting
EP1972100A4 (fr) * 2006-01-10 2012-10-03 Samsung Electronics Co Ltd Procede et systeme de communications mobiles permettant de signaler des informations se rapportant a des capacites de reseau
RU2491739C2 (ru) * 2003-06-04 2013-08-27 Нокиа Корпорейшн Система и способ для переключения вызова из сети с коммутацией пакетов в сеть с коммутацией каналов
US9301230B2 (en) 2004-11-03 2016-03-29 Vringo, Inc. Inter-system hand-over of a mobile terminal operable with a first and a second radio access network
US9380501B2 (en) 2004-03-12 2016-06-28 InterDigital Technology Corporation, Inc. Method and system for switching a radio access technology between wireless communication systems with a multi-mode wireless transmit/receive unit
US9426648B2 (en) 2011-09-12 2016-08-23 Qualcomm Incorporated Systems and methods of performing link setup and authentication
US10045271B2 (en) 2003-11-13 2018-08-07 Interdigital Technology Corporation Method and system for facilitating inter-system handover for wireless communication
USRE47858E1 (en) 2004-12-17 2020-02-11 Huawei Technologies Co., Ltd. Method and system for maintaining session continuity when changes occur at the terminal during a session

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998027777A2 (fr) * 1996-12-19 1998-06-25 Northern Telecom Limited Declenchement de transfert de qualite d'une liaison radioelectrique
WO1998027776A2 (fr) * 1996-12-17 1998-06-25 Northern Telecom Limited Procede de transfert 'impose' dans un amcr
WO1998053620A1 (fr) * 1997-05-19 1998-11-26 Northern Telecom Limited Declencheur de transfert intercellulaire a solution de continuite dans les secteurs limitrophes
WO2000042808A1 (fr) * 1999-01-14 2000-07-20 Ericsson, Inc. Radiodiffusion d'informations de canal de commande de systeme cellulaire a deux generations via un canal de commande a trois generations afin de permettre l'itinerance et le transfert entre cellules a destination de reseaux a deux generations

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998027776A2 (fr) * 1996-12-17 1998-06-25 Northern Telecom Limited Procede de transfert 'impose' dans un amcr
WO1998027777A2 (fr) * 1996-12-19 1998-06-25 Northern Telecom Limited Declenchement de transfert de qualite d'une liaison radioelectrique
WO1998053620A1 (fr) * 1997-05-19 1998-11-26 Northern Telecom Limited Declencheur de transfert intercellulaire a solution de continuite dans les secteurs limitrophes
WO2000042808A1 (fr) * 1999-01-14 2000-07-20 Ericsson, Inc. Radiodiffusion d'informations de canal de commande de systeme cellulaire a deux generations via un canal de commande a trois generations afin de permettre l'itinerance et le transfert entre cellules a destination de reseaux a deux generations

Cited By (98)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001072076A1 (fr) * 2000-03-21 2001-09-27 Nokia Corporation Transfert intercellulaire dans un reseau du type a porteuses multiples
WO2002003720A3 (fr) * 2000-07-03 2002-05-02 Ericsson Telefon Ab L M Systeme et procedes permettant de realiser un transfert entre un environnement de commutation par circuits et un environnement de commutation par paquets
GB2381706A (en) * 2000-07-03 2003-05-07 Ericsson Telefon Ab L M System and methods for performing a handover between a circuit switched environment and a packet switched environment
GB2381706B (en) * 2000-07-03 2004-02-11 Ericsson Telefon Ab L M System and methods for performing a handover between a circuit switched environment and a packet switched environment
DE10196404B3 (de) * 2000-07-03 2012-03-01 Telefonaktiebolaget Lm Ericsson (Publ) System und Verfahren zum Ausführen eines Handovers zwischen einer leitungsvermittelten Umgebung und einer paketvermittelten Umgebung
US6721565B1 (en) 2000-08-07 2004-04-13 Lucent Technologies Inc. Handover of wireless calls between systems supporting circuit and packet call models
EP1182900A1 (fr) * 2000-08-07 2002-02-27 Lucent Technologies Inc. Transfert d'appels sans fil entre des systèmes supportant des modèles d'appel à commutation par circuits et à commutation par paquets
US7706336B2 (en) * 2001-02-28 2010-04-27 Motorola, Inc. Mobile station architectures for circuit and packet modes and methods therefor
WO2002093966A1 (fr) * 2001-05-14 2002-11-21 Telefonaktiebolaget Lm Ericsson Procede de synchronisation d'une pluralite de reseaux
WO2003053091A1 (fr) * 2001-12-18 2003-06-26 Nokia Corporation Transfert intersysteme d'un terminal mobile
US7366524B2 (en) 2002-02-06 2008-04-29 Ntt Docomo Inc. Using subnet relations for paging, authentication, association and to activate network interfaces in heterogeneous access networks
EP1339250A3 (fr) * 2002-02-06 2004-03-31 DoCoMo Communications Laboratories USA, Inc. Usage les relations de sous-réseaux pour appels, authentification, association et pour activer des interfaces de réseau dans réseaux d'accès hétérogènes
EP1526752A3 (fr) * 2002-02-06 2005-08-10 DoCoMo Communications Laboratories USA, Inc. Usage les relations de sous-réseaux pour authentification, association et pour activer des interfaces de réseau dans réseaux d'accès hétérogènes
US7130313B2 (en) 2002-02-14 2006-10-31 Nokia Corporation Time-slice signaling for broadband digital broadcasting
US6907028B2 (en) 2002-02-14 2005-06-14 Nokia Corporation Clock-based time slicing
US7844214B2 (en) 2002-03-02 2010-11-30 Nokia Corporation System and method for broadband digital broadcasting
US8233839B2 (en) 2002-03-02 2012-07-31 Nokia Corporation System and method for broadband digital broadcasting
WO2003075596A1 (fr) * 2002-03-07 2003-09-12 Nokia Corporation Attribution d'une s-cscf a un abonne
WO2003084261A1 (fr) * 2002-04-03 2003-10-09 Nokia Corporation Validation de la distribution de contenu initiee par un fournisseur de contenu via un reseau d'acces radio specifique
US7643786B2 (en) 2002-04-03 2010-01-05 Nokia Corporation Enabling a content provider initiated content delivery via a specific radio access network
EP1504551A4 (fr) * 2002-05-10 2005-11-30 Qualcomm Inc Transfert dans un reseau de communication hybride
AU2003228929B2 (en) * 2002-05-10 2008-09-25 Qualcomm, Incorporated Handover in a hybrid communications network
US7499705B2 (en) 2002-05-10 2009-03-03 Qualcomm Incorporated Handover in a hybrid communications network
US7120460B2 (en) 2002-07-02 2006-10-10 Interdigital Technology Corporation Method and apparatus for handoff between a wireless local area network (WLAN) and a universal mobile telecommunication system (UMTS)
EP1883266A1 (fr) * 2002-07-02 2008-01-30 Interdigital Technology Corporation Procédé et appareil pour le transfert entre un réseau local sans fil (WLAN) et un système de télécommunication mobile universel (UMTS)
US9237503B2 (en) 2002-07-02 2016-01-12 Interdigital Technology Corporation Method and apparatus for handoff between a wireless local area network (WLAN) and a universal mobile telecommunication system (UMTS)
EP1525676A4 (fr) * 2002-07-02 2005-11-02 Interdigital Tech Corp Procede et appareil de transfert entre un reseau local sans fil (wlan) et un systeme universel de telecommunication mobile (umts)
CN100379302C (zh) * 2002-08-15 2008-04-02 汤姆森特许公司 移动终端用户从无线电话网络切换到无线局域网的技术
EP1397016A1 (fr) * 2002-09-09 2004-03-10 Nec Technologies (UK) Limited Procédé de commutation automatique d'un terminal bimode
US7058034B2 (en) 2002-09-09 2006-06-06 Nokia Corporation Phase shifted time slice transmission to improve handover
FR2846172A1 (fr) * 2002-10-21 2004-04-23 Nec Technologies Uk Ltd Procede de commutation automatique d'un terminal bimode
WO2004056150A1 (fr) * 2002-12-17 2004-07-01 Nokia Corporation Changement sans coupure de reseau d'acces radio dependant de la qualite de service (qos) requise
WO2004057815A2 (fr) 2002-12-18 2004-07-08 Qualcomm, Incorporated Protocole hybride destine a prendre en charge des communications avec des reseaux multiples
EP2252020A1 (fr) * 2002-12-18 2010-11-17 Qualcomm Incorporated Protocole hybride destiné a prendre en charge des communications avec des réseaux multiples
RU2416879C2 (ru) * 2002-12-18 2011-04-20 Квэлкомм Инкорпорейтед Гибридный протокол для поддержки обмена данными с несколькими сетями
US7916715B2 (en) 2002-12-18 2011-03-29 Qualcomm Incorporated Hybrid protocol to support communications with multiple networks
JP2010093854A (ja) * 2002-12-18 2010-04-22 Qualcomm Inc 複数のネットワークとの通信をサポートするハイブリッドプロトコル
JP2010226761A (ja) * 2002-12-18 2010-10-07 Qualcomm Inc 複数のネットワークとの通信をサポートするハイブリッドプロトコル
WO2004057815A3 (fr) * 2002-12-18 2005-10-20 Qualcomm Inc Protocole hybride destine a prendre en charge des communications avec des reseaux multiples
CN100438359C (zh) * 2002-12-30 2008-11-26 Sk电信有限公社 通过限制1xev-do系统通信状态期间对1x系统的搜索时间来防止呼叫撤销的方法和系统
EP1443796A1 (fr) * 2003-01-29 2004-08-04 Evolium S.A.S. Procédé pour l'accès simultané à des services circuit et à des services paquet dans un système cellulaire de radiocommunications mobiles
FR2850518A1 (fr) * 2003-01-29 2004-07-30 Evolium Sas Procede pour l'acces simultane a des services circuit et a des services paquet dans un systeme cellulaire de radiocommunications mobiles
RU2491739C2 (ru) * 2003-06-04 2013-08-27 Нокиа Корпорейшн Система и способ для переключения вызова из сети с коммутацией пакетов в сеть с коммутацией каналов
WO2005002267A3 (fr) * 2003-06-30 2005-03-10 Nokia Corp Methode d'optimisation du transfert entre reseaux de communications
US7224977B2 (en) 2003-07-31 2007-05-29 Siemens Mobile Communications S.P.A. Common radio resource management method in a multi-RAT cellular telephone network
EP1503606A1 (fr) * 2003-07-31 2005-02-02 Siemens Mobile Communications S.p.A. Procédé de gestion des ressources de radio communes dans un réseau de téléphone cellulaire multi-rat
CN100337487C (zh) * 2003-08-04 2007-09-12 华为技术有限公司 一种移动通信系统中物理信道资源的配置方法
US10045271B2 (en) 2003-11-13 2018-08-07 Interdigital Technology Corporation Method and system for facilitating inter-system handover for wireless communication
EP1551200A3 (fr) * 2003-12-30 2006-05-10 Nokia Corporation Procédé, système et programme pour contrôler les ressources dans un système de télécommunications sans fil
FR2865599A1 (fr) * 2004-01-22 2005-07-29 Nortel Networks Ltd Procede de gestion de communications, systeme de telecommunication pour mettre en oeuvre le procede et equipements associes
WO2005081556A1 (fr) * 2004-01-22 2005-09-01 Nortel Networks Limited Procede de gestion de communications, systeme de telecommunication pour mettre en oeuvre le procede et equipements associes
US10165478B2 (en) 2004-03-12 2018-12-25 Interdigital Technology Corporation Method and system for switching a radio access technology between wireless communication systems with a multi-mode wireless transmit/receive unit
US9380501B2 (en) 2004-03-12 2016-06-28 InterDigital Technology Corporation, Inc. Method and system for switching a radio access technology between wireless communication systems with a multi-mode wireless transmit/receive unit
US7660583B2 (en) 2004-03-19 2010-02-09 Nokia Corporation Advanced handover in phased-shifted and time-sliced networks
WO2005114875A1 (fr) * 2004-04-22 2005-12-01 Sk Telecom Co., Ltd. Systeme et procede de communication mobile permettant le transfert par paquets entre un reseau de communication asynchrone et un reseau de communication synchrone, et terminal de communication mobile utilise a cet effet
EP1608189A1 (fr) * 2004-06-18 2005-12-21 Lucent Technologies Inc. Procédé et dispositif pour reduire le temps d'attente pendant un changement de cellule dans un système de communication
WO2006006015A1 (fr) * 2004-06-28 2006-01-19 Nokia Corporation Procede et appareil assurant le transfert des contextes lors des transferts entre reseaux pdsn dans un systeme de communications sans fil
US8724582B2 (en) 2004-06-28 2014-05-13 Nokia Corporation Method and apparatus providing context transfer for inter-PDSN handoffs in a wireless communication system
EP1650998A1 (fr) * 2004-10-20 2006-04-26 TeliaSonera Finland Oyj Reacheminement d'une appel d'un réseau à commutation de circuit
US9516566B2 (en) 2004-11-03 2016-12-06 Vringo Infrastructure Inc. Inter-system hand-over of a mobile terminal operable with a first and a second radio access network
US20170078938A1 (en) * 2004-11-03 2017-03-16 Vringo Infrastructure Inc. Inter-System Hand-Over of a Mobile Terminal Operable with a First and a Second Radio Access Network
US9301230B2 (en) 2004-11-03 2016-03-29 Vringo, Inc. Inter-system hand-over of a mobile terminal operable with a first and a second radio access network
WO2006064390A3 (fr) * 2004-12-13 2006-08-31 Koninkl Philips Electronics Nv Procede et appareil pour garantir la qualite de service lors d'un transfert intercellulaire
USRE47858E1 (en) 2004-12-17 2020-02-11 Huawei Technologies Co., Ltd. Method and system for maintaining session continuity when changes occur at the terminal during a session
CN100388810C (zh) * 2005-01-11 2008-05-14 华为技术有限公司 一种实现第三代移动通信系统视频业务的方法
WO2006095994A1 (fr) * 2005-03-07 2006-09-14 Lg Electronics Inc. Fourniture d'informations de protocole de gestion de mobilite a un terminal mobile pour effectuer un transfert dans un systeme de communication mobile
US8102811B2 (en) 2005-03-07 2012-01-24 Lg Electronics Inc. Providing mobility management protocol information to a mobile terminal for performing handover in a mobile communication system
US8032133B2 (en) 2005-04-12 2011-10-04 Nokia Corporation Selecting a network entity
WO2006109182A1 (fr) * 2005-04-12 2006-10-19 Nokia Corporation Selection d'une entite de reseau
WO2007080444A1 (fr) * 2005-10-07 2007-07-19 Alcatel Lucent Procédé et dispositif facilitant le transfert d'une radiocommunication dans un système de radiocommunication cellulaire
CN101278593A (zh) * 2005-10-07 2008-10-01 阿尔卡特朗讯公司 辅助蜂窝无线通信系统中的无线通信转移的方法和设备
US10003963B2 (en) 2006-01-10 2018-06-19 Samsung Electronics Co., Ltd Mobile communications method and system for signalling information relating to network's capabilities
EP3200424A1 (fr) * 2006-01-10 2017-08-02 Samsung Electronics Co., Ltd. Procédé et système de communications mobiles permettant de signaler des informations associées aux capacités de réseau
US8718043B2 (en) 2006-01-10 2014-05-06 Samsung Electronics Co., Ltd Mobile communication method and system for signalling information relating to network's capabilities
CN102711284B (zh) * 2006-01-10 2016-08-03 三星电子株式会社 在移动通信网络中发送/接收信息的方法和装置
EP1972100A4 (fr) * 2006-01-10 2012-10-03 Samsung Electronics Co Ltd Procede et systeme de communications mobiles permettant de signaler des informations se rapportant a des capacites de reseau
US9655017B2 (en) 2006-02-28 2017-05-16 Nokia Technologies Oy Handover in communication networks
WO2007099437A1 (fr) * 2006-02-28 2007-09-07 Nokia Corporation Transfert intercellulaire dans des reseaux de communication
RU2405281C2 (ru) * 2006-02-28 2010-11-27 Нокиа Корпорейшн Хэндовер в сетях связи
US8023497B2 (en) 2006-04-19 2011-09-20 Qualcomm Incorporated Method and apparatus for dynamic anchoring of CS calls for CS-to-VoIP handoffs
JP2009534943A (ja) * 2006-04-19 2009-09-24 クゥアルコム・インコーポレイテッド Ｃｓからｖｏｉｐへのハンドオフのために、ｃｓコールを動的にアンカーする方法および装置
WO2007124306A3 (fr) * 2006-04-19 2008-03-06 Qualcomm Inc Procede et appareil pour l'ancrage dynamique des appels cs lors des transferts intercellulaires 'cs vers voix sur ip'
CN100397922C (zh) * 2006-06-02 2008-06-25 中国移动通信集团公司 呼叫业务的重试连接方法
WO2007144027A1 (fr) * 2006-06-16 2007-12-21 Telefonaktiebolaget Lm Ericsson (Publ) Commande de transfert dans un réseau mobile
WO2008022069A1 (fr) * 2006-08-15 2008-02-21 Alcatel Lucent Commutation entre des réseaux à commutation de circuits et à commutation de paquets
CN100466797C (zh) * 2006-10-16 2009-03-04 中国移动通信集团公司 移动通信系统间负荷分担的方法
WO2008125067A1 (fr) * 2007-04-17 2008-10-23 Huawei Technologies Co., Ltd. Procédé et dispositif permettant d'assurer la continuité de données vocales au cours d'une session
WO2008148430A1 (fr) 2007-06-08 2008-12-11 Telefonaktiebolaget Lm Ericsson (Publ) Transfert d'un domaine à commutation de circuit à un service à commutation de circuit sur un domaine à commutation de paquet
US9271198B2 (en) 2007-06-08 2016-02-23 Telefonaktiebolaget Lm Ericsson (Publ) Handover from circuit switched domain to circuit switched service over packet switched domain
EP2159971A4 (fr) * 2007-08-23 2010-11-03 Huawei Tech Co Ltd Système, appareil et procédé pour un transfert de service d'utilisateur
WO2009026835A1 (fr) 2007-08-23 2009-03-05 Huawei Technologies Co., Ltd. Système, appareil et procédé pour un transfert de service d'utilisateur
CN102067681B (zh) * 2008-06-17 2016-08-10 阿尔卡特朗讯 对服从语音呼叫连续性的承载的显式指示
JP2011524706A (ja) * 2008-06-17 2011-09-01 アルカテル−ルーセント 音声通話連続性を条件とするベアラの明示的指示
CN102067681A (zh) * 2008-06-17 2011-05-18 阿尔卡特朗讯 对服从语音呼叫连续性的承载的显式指示
US8934356B2 (en) 2008-06-17 2015-01-13 Alcatel Lucent Explicit indication of bearers subject to voice call continuity
EP2292049A2 (fr) * 2008-06-17 2011-03-09 Alcatel Lucent Indication explicite de porteuses soumises à la continuité d une communication vocale
WO2010003501A2 (fr) 2008-06-17 2010-01-14 Alcatel Lucent Indication explicite de porteuses soumises à la continuité d’une communication vocale
US9426648B2 (en) 2011-09-12 2016-08-23 Qualcomm Incorporated Systems and methods of performing link setup and authentication

Also Published As

Publication number Publication date
AU1317201A (en) 2001-05-08
EP1240795A1 (fr) 2002-09-18
AR029010A1 (es) 2003-06-04

Similar Documents

Publication Publication Date Title
WO2001031963A1 (fr) Transfert de terminal mobile d'un reseau de deuxieme generation vers un reseau ip de troisieme generation
US7640036B2 (en) Method for performing inter-system handovers in a mobile communication system
EP1182900B1 (fr) Transfert d'appels sans fil entre des systèmes supportant des modèles d'appel à commutation par circuits et à commutation par paquets
US9686721B2 (en) Method and system for interworking of cellular networks and wireless local area networks
EP1457080B1 (fr) Transfert intersysteme d'un terminal mobile
US7301938B2 (en) Method of transferring a packet switched to a circuit switched call
CN102187709B (zh) 经通用接入的lte上话音切换(ho)设备和方法
EP2130311B1 (fr) Appareil et procédé de transfert intercellulaire dans un système de communication sans fil hétérogène
EP2175605B1 (fr) Procédé de commutation de voie de commande de session de service centralisé de sous-système réseau central multimédia ip
US20100260105A1 (en) Domain transfer service continuity provision to a mobile terminal
US20100260172A1 (en) Providing packet-based multimedia services via a circuit bearer
EP3264721A1 (fr) Méthode et appareil pour la continuité vocale de sous-systèmes à commutation de circuits et de sous-système multimédia
KR20050023116A (ko) 다양한 억세스망들이 중첩된 이동통신시스템에서 음성 및데이터 서비스 제공 방법 및 장치
TW200901685A (en) Method and apparatus for providing circuit switched domain services over a packet switched network
JP2008527926A (ja) 回線交換無線ネットワークとパケット交換データ無線ネットワークとの間における呼ハンドオフのためのシステムと方法
KR20070058697A (ko) 통신 시스템에서 사용자 장비의 이동
MXPA05001847A (es) Tecnica para un intercambio continuo de un usuario de una terminal movil desde una red de telefonia inalambrica a una red de area local inalambrica.
EP2089995B1 (fr) Système de communication hétérogène et procédé de traitement d'un appel dans ce système
WO2008125652A1 (fr) Redirection de service dans des systèmes de communication évolués
Salkintzis et al. Voice call handover mechanisms in next-generation 3GPP systems
KR20080057281A (ko) 휴면 데이터 세션 동안 무선 통신 네트워크와 데이터접속을 유지하는 방법
WO2006023227A1 (fr) Procede d'acquisition d'un identificateur de station mobile dans un reseau hybride
KR20090016363A (ko) 인터넷 프로토콜 멀티미디어 서브시스템에서 가입자가통화중에 도메인 전환하는 장치 및 방법
EP1290848B1 (fr) Attribution d'adresse ip dans un reseau de telecommunication mobile
GB2439365A (en) Provision of supplementary services

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): AE AG AL AM AT AU AZ BA BB BG BR BY BZ CA CH CN CR CU CZ DE DK DM DZ EE ES FI GB GD GE GH GM HR HU ID IL IN IS JP KE KG KP KR KZ LC LK LR LS LT LU LV MA MD MG MK MN MW MX MZ NO NZ PL PT RO RU SD SE SG SI SK SL TJ TM TR TT TZ UA UG UZ VN YU ZA ZW

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): GH GM KE LS MW MZ SD SL SZ TZ UG ZW AM AZ BY KG KZ MD RU TJ TM AT BE CH CY DE DK ES FI FR GB GR IE IT LU MC NL PT SE BF BJ CF CG CI CM GA GN GW ML MR NE SN TD TG

121 Ep: the epo has been informed by wipo that ep was designated in this application
WWE Wipo information: entry into national phase

Ref document number: 2000975069

Country of ref document: EP

WWP Wipo information: published in national office

Ref document number: 2000975069

Country of ref document: EP

REG Reference to national code

Ref country code: DE

Ref legal event code: 8642

NENP Non-entry into the national phase

Ref country code: JP

WWW Wipo information: withdrawn in national office

Ref document number: 2000975069

Country of ref document: EP