WO2008052466A1 - Procédé, système et équipement pour une commutation parmi différents réseaux - Google Patents

Procédé, système et équipement pour une commutation parmi différents réseaux Download PDF

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Publication number
WO2008052466A1
WO2008052466A1 PCT/CN2007/070958 CN2007070958W WO2008052466A1 WO 2008052466 A1 WO2008052466 A1 WO 2008052466A1 CN 2007070958 W CN2007070958 W CN 2007070958W WO 2008052466 A1 WO2008052466 A1 WO 2008052466A1
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WO
WIPO (PCT)
Prior art keywords
network
switched
user equipment
session
target
Prior art date
Application number
PCT/CN2007/070958
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English (en)
Chinese (zh)
Inventor
Shuiping Long
Original Assignee
Huawei Technologies Co., Ltd.
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Application filed by Huawei Technologies Co., Ltd. filed Critical Huawei Technologies Co., Ltd.
Publication of WO2008052466A1 publication Critical patent/WO2008052466A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
    • H04L65/10—Architectures or entities
    • H04L65/1016—IP multimedia subsystem [IMS]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
    • H04L65/1066—Session management
    • H04L65/1083—In-session procedures
    • H04L65/1095—Inter-network session transfer or sharing
    • 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
    • H04W36/0019—Control or signalling for completing the hand-off for data sessions of end-to-end connection adapted for mobile IP [MIP]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
    • H04L65/1066—Session management
    • H04L65/1083—In-session procedures
    • H04L65/1093—In-session procedures by adding participants; by removing participants
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/14—Reselecting a network or an air interface
    • H04W36/144—Reselecting a network or an air interface over a different radio air interface technology
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W80/00—Wireless network protocols or protocol adaptations to wireless operation
    • H04W80/08—Upper layer protocols
    • H04W80/10—Upper layer protocols adapted for application session management, e.g. SIP [Session Initiation Protocol]

Definitions

  • the present invention relates to the field of IP Multimedia Subsystem (IMS) technology, and more particularly to a method, system and device for switching between different IP networks.
  • IMS IP Multimedia Subsystem
  • IMS is the third Generation Partnership meter Ge 1 j (The 3rd Generation Partnership Project , 3GPP) in version 5 (Release 5, R5) to support IP multimedia subsystem services proposed, its central feature is the use of the Session Initiation Protocol (Session Initial Protocol (SIP) protocol and its independence from access, IMS provides a common service platform for future multimedia applications, and it is an important step towards providing an all-IP network service system.
  • 3GPP 3rd Generation Partnership Project
  • SIP Session Initiation Protocol
  • the IMS standard has evolved R5 and R6 versions with the 3GPP standard system. Following the basic stabilization of the R6 version in March 2005, 3GPP introduced the R7 version, which adds some new features while enhancing the original system functions.
  • the VCC function is a new function proposed by the R7 version to solve the problem.
  • VCC refers to the continuity of voice calls, that is, when users move between various access technologies, their calls remain contiguous.
  • users from traditional 2G networks such as GSM, CDMA, CDMA
  • 3G network for example, Universal Mobile Telecommunications System UMTS, High Rate Packet Data Network HRPD
  • CS Circuit Switched
  • VCC AS It can be used to control the VCC handover.
  • the network element that the user enters into the CS network through the IMS network is the Media Gateway Control Function (MGCF), and the MGCF also controls the media gateway (MGGW) to carry the route.
  • MGCF Media Gateway Control Function
  • the industry proposes a VCC network handover scheme between a CS network and an IP network of a user equipment, and has not proposed a scheme for the user equipment to switch between IP networks.
  • the quality of the IP network of the user equipment is deteriorated
  • the user equipment may also drop calls, affecting the quality of the user's call. Summary of the invention
  • the technical problem to be solved by the embodiments of the present invention is to provide a method for switching between different IP networks, a device, and a user equipment to switch between different IP networks, so as to support user equipment to switch between different IP networks, and to prevent user equipment from falling. To improve the quality of user calls.
  • the embodiment of the present invention provides a method for a user equipment to switch between different IP networks, including:
  • the user equipment to be switched is renegotiated based on the established conversation of the IP network to be switched and the session is switched to the target IP network through the voice call continuity application server, and is switched to the target after the renegotiation with the peer session is completed. IP network.
  • the embodiment of the present invention further discloses a user equipment, including a call processing unit, where the call processing unit includes an IP network inter-network voice call continuity switching processing unit, and the IP network inter-network voice call continuity switching process.
  • the unit includes:
  • An inter-IP network voice call continuity switching initiation unit is configured to initiate an inter-IP network voice call continuity switch according to a predetermined policy;
  • the session negotiation processing unit initiates session re-negotiation of the voice call continuity handover to the target IP network based on the established session of the IP network to be handed over.
  • the system includes: a user equipment to be switched, a peer user equipment, and a network session unit;
  • the user equipment to be switched is located in an IP network to be switched, and is used to perform a session to the target IP network based on the established session of the IP network to be switched and through the network session unit and the peer user equipment. Re-negotiation, switching to the target IP network after the renegotiation with the peer user equipment session is completed;
  • the peer user equipment communicates with the user equipment to be switched over the IP network; the network session unit is configured to forward a session re-negotiation message between the user equipment to be switched and the peer user equipment .
  • a voice call continuity application server including:
  • a detection indication processing unit configured to: after detecting that the user equipment to be switched has been switched to the target IP network, indicating that the proxy call session control function entity of the IP network to be switched has completed the user equipment to be switched to the target IP network Switch.
  • a proxy call session control function entity including:
  • the release processing unit is configured to: after detecting that the user equipment to be switched has been switched to the target IP network, release the bearer resource of the user equipment to be switched under the IP network to be switched.
  • the user equipment to be switched is based on the established conversation on the IP network to be switched and through the voice call continuity application server (VCC AS) and The peer performs the session re-negotiation to switch to the target IP network, and switches to the target IP network after the renegotiation with the peer session is completed.
  • VCC AS voice call continuity application server
  • the VCC does not need to allocate the E.164 number and SIP associated with the VCC AS to the user equipment to be switched, compared with the existing VCC network handover scheme between the CS network and the IP network.
  • FIG. 1 is a prior art VCC structure reference model
  • FIG. 2 is a flow chart of a first preferred embodiment of a method for switching user equipments between different IP networks according to the present invention
  • FIG. 3 is a flow chart of a second preferred embodiment of a method for switching user equipments between different IP networks according to the present invention
  • FIG. 5 is a flowchart of a fourth preferred embodiment of a method for switching user equipments between different IP networks according to the present invention
  • FIG. 5 is a flowchart of a fourth preferred embodiment of a method for switching user equipments between different IP networks according to the present invention
  • FIG. 7 is a flow chart of a sixth preferred embodiment of a method for switching user equipments between different IP networks
  • FIG. 7 is a flowchart of a sixth preferred embodiment of a method for user equipment switching between different IP networks according to the present invention.
  • a schematic diagram of a functional module for implementing VCC switching between different IP networks; 9 is a schematic diagram showing the overall structure of a system embodiment for switching between different IP networks in the present invention.
  • FIG. 10 is a schematic diagram of functional modules for implementing VCC switching between user equipments in different IP networks by a VCC application server according to an embodiment of the present invention
  • FIG. 11 is a schematic diagram of functional modules of a P-CSCF for performing VCC switching between different IP networks in a P-CSCF according to an embodiment of the present invention.
  • Mode for Carrying Out the Invention The solution provided by the embodiment of the present invention is that the user equipment to be switched is based on the established conversation of the IP network to be switched and the session is switched to the target IP network through the voice call continuity application server and the peer end. Re-negotiation, switching to the target IP network after the renegotiation with the peer session is completed, wherein the IP network in the embodiment of the present invention may include a Wireless Local Access Network (WLAN) and high-rate packet data (High Rate Packet Data, HRPD, network, etc., and the details are not described here.
  • WLAN Wireless Local Access Network
  • HRPD High Rate Packet Data
  • the embodiment of the present invention avoids dropped calls of the user equipment and greatly improves the quality of the user's call.
  • the session negotiation between the user equipment and the VCC AS may be completed by the proxy session control function entity (P-CSCF) of the target IP network, or may be completed by the P-CSCF of the IP network to be switched.
  • P-CSCF proxy session control function entity
  • the session negotiation between the user equipment and the VCC AS is performed by the P-CSCF of the target IP network; the IP network to be switched uses the WLAN network as an example, and accesses the core network through the P-CSCF1.
  • Target network The HRPD network is used as an example, and the core network is accessed through the P-CSCF2.
  • the IP network to be switched and the P-CSCF of the target IP network are the same entity, and both are utilized.
  • the P-CSCF indicates that the P-CSCF in FIG.
  • the pktl in the user equipment UE1 to be switched indicates the radio interface accessing the WLAN network
  • pkt2 indicates Accessing the wireless interface of the HRPD network
  • the UE1 establishes a call and makes a call with the remote end through the IP network of the WLAN
  • the user equipment UE 1 and the VCC AS to be switched establish a dialog 2
  • step slO1 if the user equipment UE1 to be switched does not perform IMS registration through the HRPD network, first register with pkt2, and then perform step sl02; if UE1 is already registered in the HRPD network, step sl02 is directly executed;
  • step sl02 ⁇ step sl04 the user equipment UE 1 to be switched sends a re-INVITE message or an update message through dialog 2, and the carrying information is as follows:
  • the re-INVITE message or the update message is a message defined in the IMS, and the message is sent by the pkt2 of the UE1, and passes through the P-CSCF2 (P-CSCF in FIG. 5) and the service of the HRPD network.
  • the Serving Call Session Control Function (S-CSCF) and the VCC AS are sent to the peer end, and the re-INVITE message or the update message contains the new SDP information of the UE 1 (the new service stream is transmitted and received by the HRPD network).
  • IP address and port, media type and encoding mode change, etc.) the Contact header contains the IP address assigned by the HRPD network. It should be noted that the IP address may be different from the service flow IP address.
  • step s05 the remote end answers the final response message (200 OK message in this embodiment) to the UE 1, and the final response message (ie, the 200 OK message) contains the SDP information of the far-end response; the returned response message still passes the HRPD.
  • the P-CSCF2 of the network (P-CSCF in Figure 5) returns to pkt2 of UE1.
  • UE 1 may return an ACK message to the opposite end.
  • the ACK message is also sent by pkt2 of UE1 and sent to the peer through P-CSCF2 (P-CSCF in Figure 5) and S-CSCF, VCC AS of the HRPD network.
  • the P-CSCF of the IP network to be switched may further perform the release of the bearer resources of the UE1, and may adopt various manners. Referring to FIG. 2, FIG. 3, FIG. 4 and FIG. 5, are all preferred embodiments employed in the present invention.
  • the P-CSCF1 of the IP network to be switched learns that the user equipment to be switched releases the bearer resources when the network connection under the IP network to be switched is lost. That is, step 107a).
  • the method for obtaining the loss of the network connection may be: When the P-CSCF1 does not detect the maintenance connection signal sent by the UE1 within a certain period of time, it determines that the network connection is lost.
  • the P-CSCF1 After the P-CSCF1 releases the bearer resource, it also sends a BYE message to the VCC AS instead of the user equipment to be handed over (ie, step s108a), indicating that the UE1 related session is released; and the VCC AS goes to the P-IP of the IP network to be switched.
  • the CSCF returns a 200 OK message response (ie, step sl09a).
  • the P-CSCF user equipment of the IP network to be switched has been switched to the target IP network. ; releasing the P-CSCF of the IP network to be switched
  • the user equipment is in the IP network to be switched, and the VCC AS can instruct the UE to complete the IP access network handover by sending a NOTIFY message to the P-CSCF of the IP network to be switched (step sl07b).
  • the P-CSCF of the IP network to be switched sends a 200 message response to the VCC AS (step s108b), and then releases the bearer resources of the user equipment under the IP network to be switched (step s109b).
  • the user equipment to be switched indicates that the P-CSCF has completed the handover of the user equipment to be switched to the target IP network, and the P-CSCF of the IP network to be switched is released.
  • the UE may send a REFER message to the P-CSCF of the IP network to be switched to indicate that the P-CSCF has completed the IP network handover (step s1077);
  • the P-CSCF of the switched IP network sends a 200 message response to the UE (step s1082); and then releases the bearer resource of the user equipment under the IP network to be switched (step s109).
  • the P-CSCF sends the user equipment according to the to-be-switched user equipment.
  • the re-invitation message or the update message identifies that the user equipment to be switched initiates the handover to the target IP network (step s107d).
  • the P-CSCF releases the bearer resource of the user equipment to be switched under the IP network to be switched. (Step sl08d).
  • the session negotiation between the user equipment and the VCC AS is completed using the P-CSCF of the target IP network.
  • the specific implementation manner is described in detail by taking the session of the WLAN network to the HRPD network as an example.
  • the P-CSCF of the target IP network is used to implement session negotiation between the user equipment and the VCC AS, and finally to implement the handover between the IP networks, the above implementation manner may be adopted, for example, Switching the session from the HRPD network to the WLAN network is not mentioned here. Referring to FIG. 6 and FIG.
  • the session negotiation between the user equipment and the VCC AS is completed by the P-CSCF of the IP network to be switched; the IP network to be switched takes the WLAN network as an example, and accesses the core network through the P-CSCF1.
  • the target network is exemplified by the HRPD network, and accesses the core network through the P-CSCF2.
  • the IP network to be switched and the P-CSCF of the target IP network are the same entity.
  • the P-CSCF in FIG. 7 is equivalent to the P-CSCF1 and the P-CSCF2 in FIG.
  • the pktl in the user equipment UE 1 to be switched indicates the radio interface accessing the WLAN network
  • pkt2 Indicates a wireless interface that accesses the HRPD network.
  • the UE1 establishes a call and makes a call with the remote end through the IP network of the WLAN.
  • Step s201 if the user equipment UE1 to be switched does not perform IMS registration through the HRPD network, first register by pktl, and then perform step s202; if UE1 is already registered in the HRPD network, step s202 is directly performed;
  • step s202 to step s204 the user equipment UE 1 to be switched sends a re-INVITE message or an update message through dialog 2, and the carrying information is as follows:
  • the re-invitation re-INVITE message or the update message is sent by the pktl of the UE1, and is sent to the peer end through the P-CSCF1 and the S-CSCF of the WLAN network, and the VCC AS, which includes the new SDP information of the UE 1 (the HRPD network) Assigned new traffic stream to send and receive IP addresses and ends
  • the interface includes the IP address assigned by the WLAN network.
  • the IP address and the service stream IP address may be different.
  • the Contact header in the re-invitation re-INVITE message or the update message contains the IP address allocated by the WLAN network, in the handover process, only the service bearer is switched to the HRPD network, and the service control is still performed on the WLAN network. ;
  • step s205 the remote end answers the final response message (200 OK message in this embodiment) to the UE 1, and the final response message (ie, the 200 OK message) contains the SDP information of the far-end response; the returned message is through the WLAN.
  • the P-CSCF1 of the network returns to the pktl of the UE1; through the above steps s202 to s205, the UE 1 completes the renegotiation with the peer end, so that the service flow is switched to the new IP address and port;
  • step s206 as a three-way handshake mechanism of the SIP protocol, UE 1 may return an ACK message to the opposite end.
  • the ACK message is also sent by the pktl of the UE1, and is sent to the peer end through the P-CSCF1, the S-CSCF, and the VCC AS of the WLAN network.
  • the P-CSCF of the IP network to be switched may further perform the release of the bearer resources of the UE1, and may adopt various manners. Referring to FIG. 6 and FIG. 7, the present invention is A preferred embodiment employed.
  • the user equipment to be switched indicates that the P-CSCF has completed the handover of the user equipment to be switched to the target IP network, and the P-CSCF of the IP network to be switched is released.
  • the UE may send a REFER message to the P-CSCF of the IP network to be switched to indicate that the P-CSCF has completed the IP network handover (step s207a);
  • the P-CSCF of the switched IP network sends a 200 message response to the UE (step s208a); and then releases the bearer resource of the user equipment under the IP network to be handed over (step s209a).
  • the P-CSCF if the P-CSCF of the target IP network
  • the P-CSCF is the same entity as the P-CSCF of the IP network to be switched, and the P-CSCF identifies that the user equipment to be switched initiates handover to the target IP network according to the re-invitation message or the update message sent by the user equipment to be switched ( Step s207b), after the handover is completed, the P-CSCF releases the bearer resource of the user equipment to be switched under the IP network to be switched (step s208b).
  • the negotiation between the user equipment and the VCC AS is completed by using the P-CSCF of the IP network to be switched.
  • the specific implementation manner is described in detail by taking the session of the WLAN network to the HRPD network as an example.
  • the P-CSCF of the IP network to be switched is used to implement the session negotiation between the user equipment and the VCC AS, and finally to implement the handover between the IP networks, the above implementation manner may be adopted, for example, , Switch the session from the HRPD network to the WLAN network, and will not go into details here.
  • FIG. 8 is a schematic diagram of a functional module for implementing a VCC handover between different IP networks in a user equipment according to an embodiment of the present invention, where the user equipment includes a call processing unit, and the call processing unit is improved in the embodiment of the present invention. , that is, in the call processing unit, there are:
  • the inter-IP network voice call continuity switching processing unit 11 is configured to control network switching of voice call continuity between different IP networks.
  • the inter-IP network voice call continuity switching processing unit 11 specifically includes two logical functional units, that is, an inter-IP network voice call continuity switching initiation unit 111 and a session negotiation processing unit 112, where
  • IP network inter-network voice call continuity switching initiation unit 111 voice call between the IP networks
  • the continuity switching initiation unit 111 is mainly configured to initiate an inter-IP network voice call continuity switching according to a predetermined policy.
  • the session negotiation processing unit 112 is mainly configured to initiate session re-negotiation of the voice call continuity handover to the target IP network based on the established session of the IP network to be handed over.
  • the call to the VCC application server is initiated based on the established session of the IP network to be switched, and the session is re-negotiated with the peer end. For details, refer to the foregoing process description.
  • the switching unit 113 after the session re-negotiation is completed, switches the user equipment from the IP network to be switched to the target IP network.
  • the user equipment provided by the embodiment of the present invention may further include an indication unit 10, after the user equipment switches to the target IP network, and indicates that the IP network to be switched releases the bearer resource of the user equipment in the network to be switched.
  • the embodiment of the present invention further provides a system for switching between different IP networks, where the system includes: user equipment to be switched 1, and opposite user Device 2, network session unit 3.
  • the network conference unit 3 includes a P-CSCF 31 and a VCC application server 32.
  • the user equipment 1 to be switched is used for re-negotiating the session to the target IP network based on the established conversation in the IP network to be switched and the peer user equipment 2 through the network session unit 3, in the pair After the end user equipment 2 completes the session renegotiation, it switches to the target IP network.
  • the network session unit 3 is configured to forward a message of the session re-negotiation between the user equipment 1 to be switched and the opposite user equipment 2.
  • the P-CSCF 31 in the network session unit 3 is configured to forward a session re-negotiation message between the user equipment 1 to be switched and the VCC application server 32, and the VCC application server 32 is configured to be used at the P-CSCF 31 and the peer end.
  • the user equipment 2 forwards the message of the session re-negotiation; the P-CSCF 31 includes the P-CSCF and the target of the IP network to be switched. P-CSCF for IP networks. Specifically, the P-CSCF of the IP network to be switched and the P-CSCF of the target IP network may be different physical entities, or may be integrated into the same physical entity.
  • the VCC application server enhancement includes a detection indication processing unit 12, and the detection indication processing unit 12 is mainly used to indicate the IP network to be switched after detecting that the user equipment to be switched has been switched to the target IP network.
  • the P-CSCF has completed the handover of the user equipment to be switched to the target IP network.
  • the P-CSCF enhancement of the IP network to be switched in the embodiment of the present invention includes a release processing unit 13 , and the release processing unit 13 is mainly configured to detect that the user equipment to be switched has been switched to the target IP network, and then released.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • Business, Economics & Management (AREA)
  • General Business, Economics & Management (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Telephonic Communication Services (AREA)

Abstract

L'invention concerne un procédé consistant à commuter l'équipement utilisateur parmi différents réseaux IP, le procédé comprenant les opérations, au niveau de l'équipement utilisateur devant être commuté, consistant à :transporter la renégociation de session pour une communication vers le réseau IP objet avec l'extrémité opposée, sur la base du dialogue établi au niveau du réseau IP devant être commuté, et par l'intermédiaire du serveur d'application de continuité d'appel vocal, commuter vers le réseau IP objet après la renégociation de session avec l'extrémité opposée. L'invention concerne également un serveur d'application de continuité d'appel vocal correspondant, une entité de fonction de commande de session d'appel de serveur mandataire et un équipement utilisateur.
PCT/CN2007/070958 2006-10-25 2007-10-25 Procédé, système et équipement pour une commutation parmi différents réseaux WO2008052466A1 (fr)

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CN200610123007.8A CN101170758B (zh) 2006-10-25 2006-10-25 用户设备及用户设备在不同ip网络间切换的方法
CN200610123007.8 2006-10-25

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US8335192B2 (en) * 2010-04-13 2012-12-18 Qualcomm Incorporated Selectively transitioning between physical-layer networks during a streaming communication session within a wireless communications system
WO2015096012A1 (fr) * 2013-12-23 2015-07-02 华为终端有限公司 Procédé et appareil de traitement de session

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WO2023102286A1 (fr) * 2021-12-03 2023-06-08 Qualcomm Incorporated Procédure de transfert de la technologie d'accès inter-radio
US11974176B2 (en) 2021-12-03 2024-04-30 Qualcomm Incorporated Inter-radio access technology handoff procedure

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