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WO2008134975A1 - Method, apparatus and system for deregistering the connection address of wireless ip access network - Google Patents

Method, apparatus and system for deregistering the connection address of wireless ip access network Download PDF

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Publication number
WO2008134975A1
WO2008134975A1 PCT/CN2008/070842 CN2008070842W WO2008134975A1 WO 2008134975 A1 WO2008134975 A1 WO 2008134975A1 CN 2008070842 W CN2008070842 W CN 2008070842W WO 2008134975 A1 WO2008134975 A1 WO 2008134975A1
Authority
WO
WIPO (PCT)
Prior art keywords
access network
wireless
terminal device
network
contact address
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/CN2008/070842
Other languages
English (en)
French (fr)
Inventor
Shuiping Long
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.)
Huawei Technologies Co Ltd
Original Assignee
Huawei Technologies Co Ltd
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 Huawei Technologies Co Ltd filed Critical Huawei Technologies Co Ltd
Priority to AT08734200T priority Critical patent/ATE472889T1/de
Priority to EP08734200A priority patent/EP2045964B1/en
Priority to DE602008001643T priority patent/DE602008001643D1/de
Publication of WO2008134975A1 publication Critical patent/WO2008134975A1/zh
Priority to US12/421,037 priority patent/US8279854B2/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L61/00—Network arrangements, protocols or services for addressing or naming
    • H04L61/50—Address allocation
    • H04L61/5076—Update or notification mechanisms, e.g. DynDNS
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W60/00—Affiliation to network, e.g. registration; Terminating affiliation with the network, e.g. de-registration
    • H04W60/06—De-registration or detaching
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L61/00—Network arrangements, protocols or services for addressing or naming
    • H04L61/45—Network directories; Name-to-address mapping
    • H04L61/4588—Network directories; Name-to-address mapping containing mobile subscriber information, e.g. home subscriber server [HSS]
    • 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
    • H04L65/1073—Registration or de-registration
    • 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
    • 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
    • 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 wireless communications, and in particular, to a method, device and system for deregistering a contact address of a wireless IP access network.
  • the mobile network is no longer limited to the circuit-switched mode, and gradually evolves into the Internet Protocol (' Protocol') network.
  • the R5 phase of the 3rd Generation Partnership Project (3GPP) begins.
  • the core network of the Universal Mobile Telecommunications System (UMTS) is divided into Circuit Switched (CS). , Packet Switched ("PS”) and IP Multimedia Subsystem (“IMS").
  • CS Circuit Switched
  • PS Packet Switched
  • IMS IP Multimedia Subsystem
  • IMS is a sub-system superimposed on the existing packet domain in the Wideband Code Division Multiple Access (WCDMA) network added in the 3GPP R5 phase.
  • the main functional entities in the IMS include: Call Session Control Function (CSCF), which controls functions such as user registration and session control, and Application Server (referred to as "Application Server” for providing various business logic control functions. AS”), Home Subscriber Server (“HSS”) that centrally manages user subscription data, and Media Gateway Control Function (“MGCF”) /IMS for interworking with circuit-switched networks Media Gateway function (IMS Media Gateway, referred to as "IM-MGW”).
  • CSCF Call Session Control Function
  • AS Application Server
  • HSS Home Subscriber Server
  • MGCF Media Gateway Control Function
  • IMS Media Gateway IMS Media Gateway
  • CSCF can be divided into proxy CSCF (P-CSCF), service CSCF (S-CSCF) and query CSCF (I-CSCF).
  • P-CSCF proxy CSCF
  • S-CSCF service CSCF
  • I-CSCF query CSCF
  • the terminal device accesses the IMS through the current local P-CSCF, and the service trigger control and the service control interaction with the AS are completed by the home domain S-CSCF of the registered place, and the I-CSCF is used for implementation (such as query). Routing from the P-CSCF to the S-CSCF.
  • the IMS is in the core control layer, and the access network accessing the IMS network can be any IP access network, including the WCDMA network, Code Division Multiple Access 2000 (referred to as Code Division Multiple Access 2000, referred to as "CDMA2000”) Network, Wireless Local Access Network ("WLAN”), High Rate Packet Data (“HRPD”), or Asymmetric Digital Subscriber Line , referred to as "ADSL” network, cable (Cable) network can access IMS.
  • the core control plane provided by IMS is independent of access.
  • IMS will coexist with existing 2G networks represented by Global System for Mobile Communication (GSM) and CDMA.
  • GSM Global System for Mobile Communication
  • CDMA Code Division Multiple Access
  • the IP access network will exist in the ocean of 2G or 3G networks in the form of heat islands or islands.
  • the terminal device After the terminal device enters an IP access network to obtain an IP connection, it registers with the IMS network (the IP address assigned by the IP access network). After the network and the terminal device perform mutual authentication, the current IP address and the One or more public user identities of the user to which the terminal device belongs are bound.
  • the terminal device After the terminal device performs IMS registration, it can initiate a call through the public user identity, or receive a call from another user terminal device, and the registrar of the IMS - the S-CSCF receives the session invitation of the other terminal device to the terminal device. That is, when the received invitation is targeted to the public user identity of the terminal device, the IP address corresponding to the public user identity is extracted according to the previous binding, and the invitation target in the session invitation is replaced by the IP address, The IP access network sends the session invitation to the terminal device. When the terminal device leaves the IP access network, logout can be initiated to de-bind the current IP address of the terminal device and the public user identity. After the terminal device performs IMS deregistration (deregistration), the registrar of the IMS will not send a tongue invitation to the terminal device through the IP access network.
  • IMS deregistration deregistration
  • the process of the terminal device registering with the IMS through the UMTS network to implement the Session Initiation Protocol (SIP) is shown in FIG. 1 .
  • the terminal device initiates registration through the PS access portion of the UMTS network (including both the CS and the PS).
  • the sip:xxxxx.com part identifies that the final destination of the message is the registrar; in the To header is the public user identity to be registered (identifying the user, is the username in the communication network); Indicated is the IP address of the terminal device in the UMTS access network; the expires parameter identifies the time that the terminal device wishes to register (7200s or two hours). If the expires parameter is set to 0, the terminal device wants to perform IP address logout. .
  • the above SIP registration It is to tell the registrar that the public user identity can be accessed through the contact address (IP address) indicated in the Contact header.
  • the registration message is sent to the S-CSCF through the P-CSCF and the I-CSCF, and the S-CSCF performs initial registration authentication on the terminal device to complete the registration.
  • the terminal device or P-CSCF may send a SUBSCRIBE message to the S-CSCF to subscribe to the user's registration status if it wishes to obtain more information about the user registration.
  • the S-CSCF sends the registration status of the terminal device to the terminal device or the P-CSCF through the NOTIFY message, as shown in the dotted frame in FIG.
  • the terminal device can initiate re-registration at any time by issuing a new REGISTER request to the IMS network. For example, since the registration time has expired, the registration needs to be refreshed, and re-registration occurs.
  • the process of re-registration is exactly the same as the first SIP registration process, but it is not necessary to perform two-way authentication of the terminal device and the network.
  • the deregistration process of the registered contact address may be initiated by the terminal device when leaving the IP access network, or the network side S-CSCF may actively release the registration of the user (ie, logout) when needed, for example, the prepaid terminal device is in the call.
  • the registration of the user can be actively released by the IMS network.
  • the S-CSCF sends a logout notification to the terminal device and the P-CSCF through the NOTIFY message, indicating which public user identity is logged out in the NOTIFY message, as shown in FIG. 2.
  • VCC Voice Call Continuity
  • the VCC technology is based on IMS.
  • the S-CSCF needs to perform the network element VCC AS based on the user configuration downloaded from the HSS (introduced by 3GPP2, currently four independent functional modules in 3GPP)
  • the initial filter Criteria ("iFC") check is performed, and after the check, a third party registration is performed with the VCC AS to notify the VCC AS that the terminal device has been registered with the IMS, and subsequently through the IP access network.
  • iFC initial filter Criteria
  • the S-CSCF needs to perform an initial filtering standard check of the VCC AS based on the user configuration downloaded from the HSS, and then perform a third-party registration with the VCC AS to notify the VCC AS of the terminal device.
  • the IMS registration has been canceled, and the call of the terminal device cannot be received and delivered through the IP access network, as shown in FIG. 2 .
  • the signaling needs to enter the IMS network, and the VCC AS is responsible for selecting the delivery domain of the call, that is, whether the IP access network registered through the terminal device is selected or passed.
  • the CS network sends the call, and the network side sends the call to the target terminal device through the selected IP access network or the CS network.
  • the inventor of the present invention finds that when the terminal device leaves the IP access network in an abnormal manner, if the terminal device loses the signal of the currently connected IP access network and does not have time to log out to the IMS network, the subsequent When the call is received from the public identity of the user, the call may still be sent through the IP access network. In this case, the call fails to be delivered or the call setup time is prolonged.
  • Embodiments of the present invention provide a method for deregistering a contact address of a wireless IP access network, a terminal device, a network side device based on an IP multimedia subsystem, a network element, and a terminal device logout system of a wireless IP access network, so that the terminal device is in the After leaving the IP access network in an abnormal manner, the IP address of the IP access network associated with the user identity is still received, and the call is sent from the IP access network. The problem that comes with it.
  • an embodiment of the present invention provides a method for deregistering a contact address of a wireless IP access network, including the steps of:
  • the terminal device leaves the first wireless IP access network, if the contact address of the terminal device in the first wireless IP access network is not logged out to the IP multimedia subsystem IMS network, the currently available access through the terminal device The network notifies the IMS network to deregister the contact address of the terminal device in the first wireless IP access network.
  • An embodiment of the present invention further provides a terminal device, including:
  • a determining unit configured to determine, when the terminal device leaves the first wireless IP access network, whether to cancel the contact address of the terminal device in the first wireless IP access network to the IMS network;
  • a logout initiation unit configured to determine, at the determining unit, that the terminal device does not
  • the IMS network When the IMS network cancels the contact address of the terminal device in the first wireless IP access network, the IMS network passes the terminal The access network currently available to the end device notifies the IMS network to deregister the contact address of the terminal device in the first wireless IP access network.
  • Embodiments of the present invention also provide a network side device based on an IP multimedia subsystem, including:
  • a receiving unit configured to receive, by using a currently available access network, a notification of canceling a contact address of the terminal device in the first wireless IP access network
  • a cancellation unit configured to, after the receiving unit receives the notification that the terminal device is disconnected from the contact address of the first wireless IP access network, cancel the contact address of the terminal device in the first wireless IP access network.
  • the embodiment of the present invention further provides a network element, where the network element is connected to the S-CSCF of the IMS network, and includes:
  • a determining unit configured to: when receiving the circuit domain message from the terminal device, determine whether the message includes an indication that the terminal device has left the first wireless IP access network;
  • a notifying unit configured to notify the S-CSCF to cancel the terminal device at the first when the determining unit determines that the circuit domain message includes the indication that the terminal device has left the first wireless IP access network The contact address of the wireless IP access network.
  • the embodiment of the present invention further provides a terminal device deregistration system of a wireless IP access network, which at least includes: a terminal device, and an S-CSCF corresponding to the terminal device, where
  • the terminal device is configured to: when leaving the first wireless IP access network, if it is determined that the terminal device is not logged out of the contact address of the first wireless IP access network to the IMS network, the terminal device is currently available
  • the access network notifies the IMS network to cancel the contact address of the terminal device in the first wireless IP access network
  • the S-CSCF is configured to, after receiving the notification that the terminal device is disconnected from the contact address of the first wireless IP access network, cancel the contact address of the terminal device in the first wireless IP access network.
  • the main effect of the embodiment of the present invention is that, when the terminal device leaves the first wireless IP access network, if the contact address of the terminal device in the first wireless IP access network is not cancelled to the IP multimedia subsystem IMS network, the terminal passes through the terminal.
  • the access network currently available to the device notifies the IMS network to cancel the contact address of the terminal device in the first wireless IP access network.
  • the subsequent call of the terminal device is still sent by the wireless IP access network according to the IP access network contact address associated with the terminal device user identity.
  • the problem caused by the call is as follows Send a call failure or extend the call setup time, etc.
  • FIG. 1 is a flow chart of a terminal device performing IMS registration in the prior art
  • FIG. 2 is a flow chart of IMS logout of a network side originating terminal device in the prior art
  • FIG. 3 is a flow chart of a method for deregistering a contact address of a wireless IP access network according to a first embodiment of the present invention
  • FIG. 4 is a flow chart showing a method of deregistering a contact address of a wireless IP access network according to a second embodiment of the present invention
  • Figure 5 is a diagram showing the structure of a terminal device logout system of a wireless IP access network according to a fourth embodiment of the present invention.
  • a first embodiment of the present invention relates to a method of deregistering a contact address of a wireless IP access network.
  • the first wireless IP access network is a WLAN network
  • the other access networks are HRPD networks. That is to say, the terminal device leaves the WLAN network in an abnormal manner, and the contact address of the WLAN network is not logged out to the IMS network, but the current HRPD network is available, and the terminal device revokes the WLAN network contact address to the IMS network through the HRPD network.
  • the IP address assigned by the HRPD network is 5555::1:2:3:4; the IP address assigned by the WLAN network is 5555::5:6:7:8.
  • the specific replenishment process is shown in Figure 3.
  • the terminal device After detecting the loss of the signal of the WLAN network, the terminal device sends a REGISTER message through the HRPD network to the P-CSCF2 serving the HRPD network, and the REGISTER message is sent to the terminal via the I-CSCF.
  • the REGISTER message contains:
  • the S-CSCF updates the registration status of the terminal device, and the updated registration status is that the contact address of the WLAN network has been logged out, the contact address of the HPRD network has been re-registered, and a NOTIFY message is sent to the terminal device, and the notification is sent.
  • the registration status information of the terminal device after updating.
  • the terminal device returns a confirmation message after receiving the NOTIFY.
  • the S-CSCF sends a NOTIFY message to the P-CSCF2 serving the HRPD network to notify the registration status information of the user to which the terminal device belongs.
  • P-CSCF2 returns a confirmation message after receiving the NOTIFY message.
  • the S-CSCF identifies the P-CSCF associated with the deregistered contact address, that is, the P-CSCF1 of the WLAN network service, and sends a NOTIFY message to the P-CSCF1 to notify the registration status information of the user to which the terminal device belongs. .
  • the P-CSCF1 After receiving the NOTIFY message, the P-CSCF1 returns an acknowledgement message, and instructs the WLAN network to release the user-related radio access resource, and may further delete the registration information of the user according to the registration status information. Or instructing the WLAN network to release the radio access resource related to the user, or deleting the registration information of the user according to the registration status information.
  • the WLAN network contact address associated with the user identity of the terminal device is still sent, and the WLAN network contact address is sent from the WLAN network contact address.
  • the problem caused by the call is as follows: sending a call failure or extending the call setup time, etc., while avoiding waste of wireless access resources of the WLAN network.
  • the re-registration process sends a registration message to the S-CSCF, and the S-CSCF can update the user registration, such as updating the registration time, or canceling the registration (ie, canceling), and notifying the P-CSCF of the
  • the registration message sent by the other access network carries the information for canceling the contact address of the WLAN network, and can trigger the S-CSCF to identify the P-CSCF associated with the contacted contact address, and send the registration status information to the
  • the P-CSCF deletes the registration information of the user according to the registration status information, and may further instruct the WLAN network to release the radio access resources related to the user, so that the terminal device can also be timely after leaving the WLAN network in an abnormal manner.
  • the logout is performed to prevent the subsequent call of the terminal device from being sent from the WLAN network, which brings unnecessary problems and avoids waste of wireless access resources of the WLAN network.
  • the network side does not authenticate the terminal device at the time of re-registration, and the related steps of registration are omitted.
  • the terminal can also be used according to the prior art.
  • the device is authenticated without affecting the effects of the present embodiment.
  • the first wireless IP access network is used as the WLAN network, and the other access network is the HRPD network as an example.
  • the first wireless IP access network may also be an HRPD network.
  • the other access network may be a WLAN network, and the specific implementation is similar to that in this embodiment, and details are not described herein again.
  • the second embodiment of the present invention also relates to a method of deregistering a contact address of a wireless IP access network.
  • the first embodiment is different from the first embodiment.
  • a wireless IP access network HRPD network
  • the WLAN network is deregistered.
  • the terminal device after the terminal device leaves the WLAN network in an abnormal manner, no wireless IP access network is currently available, and only CS networks such as CDMA lx or GSM are available, so the terminal device
  • the CS network's message transmission mechanism such as Short Message Service (“SMS") or Unstructured Supplementary Services Data (“USSD”), can be used to notify the VCC AS that the terminal device has left the WLAN.
  • SMS Short Message Service
  • USSD Unstructured Supplementary Services Data
  • the other network unit here may be a centralized service control unit, that is, in a scenario where the terminal device can also access the IMS network through the CS network, the terminal device can notify the CS network to the adaptation processing unit of the IMS network. (ie, centralized service control unit) "The terminal device has left the WLAN network, and then the centralized service control unit requests the S-CSCF to initiate a logout process for the terminal device.
  • step 401 after detecting that the signal of the WLAN network is lost, the terminal device encapsulates the information that the terminal device has left the WLAN network as the content of the SMS message, and sends the SMS message with the VCC AS as the destination address to notify The VCC AS the terminal device leaves the WLAN network.
  • the VCC AS determines that the terminal device has left the WLAN network, and notifies the S-CSCF to perform a logout of the WLAN network contact address for the user.
  • VCC AS there are many ways for the VCC AS to notify the S-CSCF, such as sending a Message message requesting the S-CSCF to initiate a logout procedure for the terminal device, or sending a NOTIFY message to notify the S-CSCF that the terminal device has left the IP access network.
  • the S-CSCF returns a response message after receiving the notification.
  • the S-CSCF identifies the P-CSCF associated with the deactivated contact address, that is, the P-CSCF1 serving as the WLAN network, and sends a NOTIFY message to the terminal device through the P-CSCF1, indicating that the terminal device has been Cancel IMS registration. Since the WLAN network signal has been lost, the terminal device does not receive the NOTIFY message, and after waiting for the response message of the terminal device to time out, the P-CSCF1 returns the 200 OK confirmation message to the S-CSCF.
  • the S-CSCF sends a NOTIFY message to the P-CSCF1 indicating that the terminal device has been unregistered, and the P-CSCF1 returns an acknowledgement message after receiving the NOTIFY message, and deletes the user's registration according to the NOTIFY message.
  • Information may further instruct the WLAN network to release user-related radio access resources. Therefore, when the terminal device leaves the WLAN network in an abnormal manner, and subsequently receives a call to the public identity of the user of the terminal device, the WLAN network contact address associated with the user identity is still sent from the WLAN network.
  • the problem caused by the call is as follows: the call is failed or the call setup time is extended. At the same time, avoid the waste of wireless access resources of the WLAN network.
  • the S-CSCF performs an initial filtering standard check to which the VCC AS belongs according to the user configuration downloaded from the HSS, and performs third-party registration with the VCC AS after the check is passed to notify the VCC AS that the terminal device has The IMS registration of the WLAN network is canceled.
  • the call of the terminal device cannot be delivered through the WLAN network.
  • the VCC AS After the VCC AS receives it, it returns a confirmation message.
  • the S-CSCF Since the S-CSCF actively initiates the IMS logout is a known technique for those skilled in the art, in this embodiment, only the network element that is connected (directly or indirectly connected) to the S-CSCF through the CS domain message is notified that the terminal device leaves the WLAN. In the state of the network, the S-CSCF is triggered by the network element to initiate the IMS logout, so as to prevent the terminal device from leaving the IP access network in an abnormal manner, and subsequently receiving the call of the public identity of the user of the terminal device, According to the WLAN network contact address associated with the user identity, the problem caused by the call is sent from the WLAN network, and since the foregoing message and the IMS logoff process are both existing, the implementation manner is very convenient.
  • the third embodiment of the present invention also relates to a method for deregistering a contact address of a wireless IP access network, which is substantially the same as the first or second embodiment, except that in the first or second embodiment, the terminal device is detecting After the signal to the first wireless IP access network is lost, the IMS is automatically initiated, including the re-registration process initiated by the other access network, or the CS domain message is sent. In this embodiment, the terminal device detects the first wireless. After the signal of the IP access network is lost, the timer is started, if the timer If the first wireless IP access network is not re-accessed before the timeout, that is, the signal of the first wireless IP access network is not re-detected, the IMS is logged out. By setting a timer, the terminal device can be prevented from frequently registering and deregistering the first wireless IP access network, thereby reducing energy consumption of the terminal device.
  • a fourth embodiment of the present invention relates to a terminal device deregistration system of a wireless IP access network.
  • the terminal device includes at least one terminal device, and an S-CSCF and a VCC AS corresponding to the terminal device.
  • the terminal device includes: a determining unit, configured to determine, when the terminal device leaves the first wireless IP access network, whether to cancel the contact address of the terminal device in the first wireless IP access network to the IMS network; When the determining unit determines that the terminal device does not cancel the contact address of the terminal device in the first wireless IP access network to the IMS network, notifies the IMS network to cancel the terminal through other access networks currently available to the terminal device.
  • the contact address of the device in the first wireless IP access network is configured to determine, when the terminal device leaves the first wireless IP access network, whether to cancel the contact address of the terminal device in the first wireless IP access network to the IMS network.
  • the terminal device leaves the IP access network in an abnormal manner, when the call corresponding to the public identity of the user of the terminal device is subsequently received, the IP access network contact address associated with the user identity is still received from the IP address.
  • the problem caused by the call is sent to the network, such as sending a call failure or extending the call setup time.
  • the cancellation initiation unit notifies the S-CSCF of the IMS network to cancel the contact address of the terminal device in the first wireless IP access network by using other access networks currently available to the terminal device.
  • the logout initiation unit may further include the following subunits: a logout information setting unit, configured to be set in the message of the re-registration process The information of the first wireless IP access network is deleted; the re-registration sub-unit is configured to initiate a re-registration process to other currently available access networks, and the message of the re-registration process is used to cancel the first wireless IP set by the log-out information setting unit.
  • the information of the access network is sent to the S-CSCF.
  • the re-registration process sends a registration message to the S-CSCF, and the S-CSCF can update the user registration, such as updating the registration time, or canceling the registration (ie, canceling), and notifying the P-CSCF.
  • the registration status of the user causes the P-CSCF to delete the registration information of the user. Therefore, after the terminal device leaves the IP access network in an abnormal manner, the terminal device can perform IMS logout in time to prevent the subsequent call of the terminal device from being The IP access network is delivered, which brings unnecessary problems.
  • the logout initiation unit may further include the following subunits: a leave indication setting unit, for the message in the circuit domain. Setting an indication that the terminal device has left the first wireless IP access network; a sending unit, configured to send the CS domain message to the VCC AS by using another currently available access network, and triggering the VCC AS to indicate the S by using an indication that the terminal device set in the CS domain message has left the first wireless IP access network -
  • the CSCF deregisters the contact address of the terminal device in the first IP access network.
  • the present embodiment triggers the S-CSCF to actively initiate the first wireless IP access network in the IMS network for the terminal device by using the existing message without using the new signaling.
  • the contact address while avoiding the problem that the subsequent call is still sent from the IP access network after the terminal device leaves the IP access network in an abnormal manner, makes the implementation more convenient.
  • the CS domain message in this embodiment may be an existing SMS message or a USSD message.
  • the S-CSCF includes: a receiving unit, configured to receive, by using a currently available access network, a notification of canceling a contact address of the terminal device in the first wireless IP access network; and a cancellation unit, configured to receive the logout terminal at the receiving unit After the device notifies the contact address of the first wireless IP access network, the device cancels the contact address of the terminal device in the first wireless IP access network.
  • Receiving, by the receiving unit, the notification of canceling the contact address of the terminal device in the first wireless IP access network from the currently available access network by: receiving from the re-registration process of other wireless IP access networks initiated by the terminal device Deregistering information of the first wireless IP access network, the information including a contact address, etc.; or receiving an indication from the VCC AS that the terminal device has left the first wireless IP access network.
  • the VCC AS includes: a determining unit, configured to: when receiving the CS domain message from the terminal device, determine whether the message includes an indication that the terminal device has left the first wireless IP access network; and the notification unit is configured to The determining unit determines that the CS domain message includes an indication that the terminal device has left the first wireless IP access network, and notifies the S-CSCF to cancel the contact address of the terminal device in the first wireless IP access network.
  • the embodiment of the present invention further provides a terminal device, including: a determining unit and a logout initiating unit, where the determining unit is configured to determine whether the terminal device has gone to the IMS when leaving the first wireless IP access network.
  • the network cancels the contact address of the terminal device in the first wireless IP access network;
  • the logout initiation unit is configured to determine, in the determining unit, that the terminal device does not cancel the terminal device to the IMS network at the first
  • the access network currently available to the terminal device notifies the IMS network to cancel the contact address of the terminal device in the first wireless IP access network.
  • the terminal device further includes:
  • the terminal device further includes: a determining unit, configured to determine that the terminal device is away from Whether the time of opening the first wireless IP access network exceeds a predetermined time limit, and transmitting the result exceeding the predetermined time limit to the determining unit.
  • a determining unit configured to determine that the terminal device is away from Whether the time of opening the first wireless IP access network exceeds a predetermined time limit, and transmitting the result exceeding the predetermined time limit to the determining unit.
  • terminal device has the same function and function as the terminal device described in FIG. 5 above. For details, refer to the above, and no further description is provided herein.
  • the embodiment of the invention further provides a network side device based on an IP multimedia subsystem, comprising: a receiving unit and a logout unit.
  • the receiving unit is configured to receive, by using a currently available access network, an indication that the terminal device has left the first wireless IP access network;
  • the cancellation unit is configured to receive, at the receiving unit, that the terminal device has left After the indication of the first wireless IP access network, the contact address of the terminal device in the first wireless IP access network is cancelled.
  • the receiving unit may receive the information of canceling the first wireless IP access network from the re-registration of other wireless IP access networks initiated by the terminal device, or receive the logout terminal device from the network element having the receiving circuit domain message. Notification of the contact address of the first wireless IP access network.
  • the network side device has the same function and function as the S-CSCF described in FIG. 5 above. For details, refer to the above, and no further description is provided herein.
  • the embodiment of the present invention further provides a network element, where the network element is connected to the S-CSCF of the IMS network, and includes: a determining unit and a notifying unit.
  • the determining unit is configured to: when receiving the circuit domain message from the terminal device, determine whether the message includes an indication that the terminal device has left the first wireless IP access network; the notification unit is used in the Determining, by the determining unit, that the circuit domain message includes the indication that the terminal device has left the first wireless IP access network, notifying the S-CSCF to cancel the connection of the terminal device in the first wireless IP access network address.
  • the terminal device when the terminal device leaves the first wireless IP access network, if the contact address of the terminal device in the first wireless IP access network is not logged out to the IMS network, the terminal passes through the terminal.
  • the other access network currently available to the device notifies the IMS network to deregister the contact address of the terminal device in the first wireless IP access network. Therefore, after the terminal device leaves the IP access network in an abnormal manner, when the subsequent call to the public identity of the user of the terminal device is received, the IP access network contact address associated with the user identity is still received from the IP address.
  • the problem caused by the call is sent to the network, such as sending a call failure or extending the call setup time.
  • the terminal device initiates a re-registration process to other currently available access networks, and carries the information of canceling the first wireless IP access network in the re-registration process, and sends the information of the first wireless IP access network to the S-CSCF.
  • the S-CSCF deregisters the contact address of the terminal device in the first wireless IP access network according to the information. Since in the prior art, the re-registration process sends a registration message to the S-CSCF, and the S-CSCF can initiate the deactivation of the contact address of an IP access network in the IMS network for the terminal device, and therefore, through other accesses.
  • the registration message of the network carries the information of canceling the first wireless IP access network, and the existing re-registration process may be used to trigger the S-CSCF to initiate the cancellation of the contact address of the first wireless IP access network in the IMS network for the terminal device. Therefore, after the terminal device leaves the first wireless IP access network in an abnormal manner, the terminal device can perform the logout in time to prevent the subsequent call of the terminal device from being sent from the first wireless IP access network, thereby causing unnecessary The problem.
  • the terminal device may send a CS domain message to the VCC AS through the CDMA lx network, where the message indicates that the terminal device has left the first wireless IP access network;
  • the message is triggered by the VCC AS to instruct the S-CSCF to initiate a logout process for the terminal device to initiate a first wireless IP access network contact address.
  • the embodiment of the present invention can use the existing signaling to trigger the S-CSCF to actively deregister the first wireless device for the terminal device in the IMS network without adding signaling.
  • the contact address of the IP access network while avoiding the problem that the subsequent call is still sent from the contact address of the IP access network after the terminal device leaves the first wireless IP access network in an abnormal manner, Embodiments of the invention are more convenient to implement.
  • the VCC AS may directly send the CS domain message received by the terminal device that the terminal device has left the first wireless IP network to the S-CSCF, and trigger the S-CSCF to actively deregister the terminal device in the first wireless IP access network.

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Description

注销无线 IP接入网联系地址的方法、 设备及系统
本申请要求于 2007 年 4 月 30 日提交中国专利局、 申请号为 200710103625.0、发明名称为"注销无线 IP接入网联系地址的方法和设备"的中 国专利申请的优先权， 其全部内容通过引用结合在本申请中。
技术领域
本发明涉及无线通信领域，特别涉及注销无线 IP接入网联系地址的方法、 设备及系统。
背景技术
随着通信技术的突飞猛进， 在将来的 3G网络架构中， 移动网不再局限于 电路交换的方式， 逐渐向网际协议（Internet Protocol, 简称' ΊΡ" ) 网络演变。 从第三代移动通信合作伙伴项目 （ 3rd Generation Partnership Project, 简称 "3GPP" ) 的 R5 阶段开始， 通用移动电信系统 （ Universal Mobile Telecommunications System, 简称" UMTS" ) 的核心网被划分为电路交换域 ( Circuit Switched, 简称" CS" )、 分组交换域（ Packet Switched, 简称" PS" ) 以 及 IP多媒体子系统（ IP Multimedia Subsystem, 简称" IMS" )三个子系统。
IMS 是 3GPP R5 阶段增加的宽带码分多址（Wideband Code Division Multiple Access, 简称" WCDMA" ) 网络中叠加在已有分组域之上的一个子系 统。 IMS中主要的功能实体包括： 控制用户注册、会话控制等功能的呼叫会话 控制功能实体（Call Session Control Function, 简称" CSCF" )、提供各种业务逻 辑控制功能的应用服务器（Application Server, 简称" AS" )、 集中管理用户签 约数据的归属用户服务器（Home Subscriber Server, 简称 "HSS" ) 以及用于实 现与电路交换网互通的媒体网关控制功能（ Media Gateway Control Function, 简称" MGCF" ) /IMS媒体网关功能（IMS Media Gateway, 简称" IM-MGW" )。 其中， CSCF又可分为代理 CSCF ( P-CSCF )、 服务 CSCF ( S-CSCF )和查询 CSCF ( I-CSCF )。 终端设备通过当前所在地 P-CSCF接入 IMS, ^舌和业务触 发控制及与 AS 的业务控制交互则由其注册地的归属域 S-CSCF 完成， 而 I-CSCF则用于实现（如查询 )从 P-CSCF到 S-CSCF的路由。
IMS处于核心控制层， 接入 IMS网的接入网可以是任何 IP接入网， 包括 WCDMA网络、 码分多址 2000 ( Code Division Multiple Access 2000, 简称 "CDMA2000" ) 网络、 无线本地接入网 （Wireless Local Access Network, 简称 "WLAN" )、 高速分组数据（High Rate Packet Data, 简称 "HRPD" ), 或者， 非 对称数字用户线（ Asymmetric Digital Subscriber Line, 简称" ADSL" )网络、 光 缆（Cable ) 网络都可以接入到 IMS。 IMS提供的核心控制层面与接入无关。
随着通信网络的发展， IMS 将和现有的以全球移动通信系统 （Global System for Mobile Communication, 简称" GSM" )和 CDMA为代表的 2G网络 长期共存， 这期间， IMS将主要覆盖大中城市的数据业务高需求区域， IP接 入网将以热岛或孤岛形式存在于 2G或 3G网络的海洋中。 终端设备进入某一 IP接入网获取 IP连接后 , 就向 IMS网络进行联系地址（ IP接入网分配的 IP 地址） 注册， 网络和终端设备进行相互认证成功后， 当前的 IP地址就和该终 端设备所属用户的一个或多个公共用户身份绑定起来。 终端设备进行 IMS注 册后， 就可以通过该公共用户身份发起呼叫，或者接收其它用户终端设备的呼 叫， IMS的注册员 （registrar ) - S-CSCF收到其它终端设备对该终端设备的会 话邀请时， 即在收到的邀请是以该终端设备的公共用户身份为目标时，将根据 之前的绑定， 提取该公共用户身份对应的 IP地址， 以该 IP地址替代会话邀请 中的邀请目标， 通过该 IP接入网将该会话邀请发送给该终端设备。 在终端设 备离开该 IP接入网时， 可以发起注销， 实现终端设备当前 IP地址和公共用户 身份的解绑定。 在终端设备进行 IMS去注册（注销）后， IMS的注册员不会 再通过该 IP接入网向该终端设备发送^舌邀请。
终端设备通过 UMTS 网络向 IMS 进行^舌发起协议（Session Initation Protocol, 简称" SIP" )注册的过程如图 1所示。 终端设备通过 UMTS网络（包 括 CS和 PS两个部分 )的 PS接入部分发起注册。 终端设备首先获得该终端设 备在该 PS接入网的 IP地址， 根据获取的 IP地址发送注册消息 REGISTER ( sip:xxxxx.com SIP/2.0, To :<sip： Walter@xxxxx. com> , Contact:<SIP: [5555: :1:2: 3:4]>; expires=7200 )。 该注册消息中， sip:xxxxx.com部分标识了该消息的最 终目的地是登记员； 在 To头中是要注册的公共用户身份（标识用户， 是通信 网络中的用户名）； Contact头中所指出的是该终端设备在 UMTS接入网的 IP 地址； expires参数标识该终端设备希望注册的时间 （7200s即两个小时）， 若 expires参数设为 0, 则该终端设备希望进行 IP地址注销。 上述 SIP注册的目 的是告诉登记员： 公共用户身份可以通过 Contact头中所指出的联系地址（IP 地址）来访问到。 该注册消息通过 P-CSCF、 I-CSCF发送给该 S-CSCF, 由 S-CSCF对该终端设备进行初次注册的认证， 完成本次注册。
在注册完成后，终端设备或 P-CSCF如果希望获得关于用户注册的更多消 息， 可以发送 SUBSCRIBE (订阅 )消息到 S-CSCF向其订阅用户的注册状态。 在进行了订阅后， 当终端设备的注册状态变化时， S-CSCF都会通过 NOTIFY 消息将终端设备的注册状态发送到终端设备或 P-CSCF,如图 1中的虚框部分。
终端设备成功向 IMS 网络进行联系地址注册后， 任何时候终端设备都可 以通过向 IMS网络发出一个新的注册（REGISTER )请求来发起重注册。 例如 由于注册时间超时了， 注册就需要进行刷新， 这时就会发生重注册。 重注册的 处理和首次 SIP注册过程完全一样，但不是必须进行终端设备和网络的双向认 证。
已注册联系地址的注销过程可以由该终端设备在离开 IP接入网时主动发 起， 也可以由网络侧 S-CSCF在需要时主动解除用户的注册（即注销）， 如预 付费终端设备在通话过程中余额用光时， 可由 IMS网络主动解除用户的注册。 在 IMS网络需要进行用户注销时， 由 S-CSCF通过 NOTIFY消息向终端设备 和 P-CSCF发送注销通知，在 NOTIFY消息中指示了哪个公共用户身份被注销， 如图 2所示。
以上对终端设备进行公共用户身份的注册、重注册和注销的过程进行了简 单说明， 下面对语音呼叫连续性（Voice Call Continuity, 简称" VCC" )进行介 绍。 VCC最初由 3GPP提出来，旨在解决电路交换（ Circuit Switching,简称" CS" ) 网络的电路语音呼叫和基于 IP接入网的分组语音（ Voice over IP,简称" VoIP" ) 呼叫之间的连续性问题， 使得终端设备可以在 CS网络（ GSM或 UMTS的 CS 部分）和 WLAN接入网络之间方便的进行切换。
VCC技术基于 IMS, 为了支持 VCC, 在终端设备注册完成后， S-CSCF 需要基于从 HSS下载的用户配置，进行网元 VCC AS(由 3GPP2引入，在 3GPP 中目前是四个独立的功能模块 )所属的初始过滤标准（ initial Filter Criteria, 简 称" iFC" )检查，在通过检查后向 VCC AS 进行第三方注册，以通知该 VCC AS 该终端设备已进行了 IMS注册， 后续可以通过 IP接入网接收和下发该终端设 备的呼叫，如图 1所示。 同样，在注销该终端设备后， S-CSCF需要基于从 HSS 下载的用户配置， 进行 VCC AS所属的初始过滤标准检查， 通过后向 VCC AS 进行第三方注册， 以通知该 VCC AS"该终端设备已经取消 IMS注册"， 后续不 可以通过该 IP接入网接收和下发该终端设备的呼叫， 如图 2所示。
当其它终端设备通过 CS网络向该终端设备发起呼叫时， 其信令需要进入 IMS网络， 由 VCC AS负责选择该呼叫的下发域， 即选择是通过该终端设备注 册的 IP接入网还是通过 CS网络下发该呼叫 , 网络侧通过所选择的 IP接入网 或 CS网络将该呼叫下发给目标终端设备。
然而， 本发明的发明人发现， 当终端设备以非正常方式离开 IP接入网后， 如该终端设备丢失了当前连接的 IP接入网的信号而来不及向 IMS网络进行联 系地址注销时， 后续收到对该用户公共身份的呼叫时， 仍然可能通过该 IP接 入网下发该呼叫，此时，容易发生呼叫下发失败或者延长呼叫建立时间等问题。
发明内容
本发明实施方式提供一种注销无线 IP接入网联系地址的方法、终端设备、 基于 IP多媒体子系统的网络侧设备、 网元和无线 IP接入网的终端设备注销 系统， 使得终端设备在以非正常方式离开某 IP接入网后， 能够避免后续收到 对该终端设备的呼叫时， 仍然根据该用户身份关联的该 IP接入网联系地址， 从该 IP接入网下发该呼叫所带来的问题。
为解决上述技术问题， 本发明的实施方式提供了一种注销无线 IP接入网 联系地址的方法， 包括步骤：
终端设备离开第一无线 IP接入网时， 如果没有向 IP多媒体子系统 IMS 网络注销该终端设备在所述第一无线 IP接入网的联系地址， 则通过所述终端 设备当前可用的接入网通知所述 IMS网络注销所述终端设备在第一无线 IP接 入网的联系地址。
本发明的实施方式还提供了一种终端设备， 包括：
判断单元， 用于判断所述终端设备离开第一无线 IP接入网时， 是否已 向 IMS网络注销该终端设备在该第一无线 IP接入网的联系地址；
注销发起单元， 用于在所述判断单元判定所述终端设备没有向所述
IMS网络注销该终端设备在该第一无线 IP接入网的联系地址时， 通过该终 端设备当前可用的接入网通知该 IMS 网络注销该终端设备在第一无线 IP 接入网的联系地址。
本发明的实施方式还提供了一种基于 IP多媒体子系统的网络侧设备， 包 括：
接收单元， 用于通过当前可用的接入网接收注销终端设备在第一无线 IP接入网的联系地址的通知；
注销单元， 用于在所述接收单元收到注销终端设备在第一无线 IP接入 网的联系地址的通知后 , 注销该终端设备在第一无线 IP接入网的联系地址。
本发明的实施方式还提供了一种网元，该网元与 IMS网络的 S-CSCF连接， 包括：
判断单元， 用于在收到来自终端设备的电路域消息时， 判断该消息中 是否包括该终端设备已离开第一无线 IP接入网的指示；
通知单元， 用于在所述判断单元判定所述电路域消息中包括所述终端 设备已离开所述第一无线 IP接入网的指示时， 通知所述 S-CSCF注销该终 端设备在第一无线 IP接入网的联系地址。
本发明实施方式还提供一种无线 IP接入网的终端设备注销系统， 至少 包括： 终端设备， 以及所述终端设备对应的 S-CSCF, 其中，
所述终端设备， 用于在离开第一无线 IP接入网时， 若判定没有向 IMS 网络注销所述终端设备在该第一无线 IP接入网的联系地址时， 则通过该终 端设备当前可用的接入网通知该 IMS 网络注销该终端设备在第一无线 IP 接入网的联系地址；
所述 S-CSCF， 用于在接收到注销所述终端设备在第一无线 IP接入网的 联系地址的通知后， 注销该终端设备在第一无线 IP接入网的联系地址。
本发明实施方式主要效果在于， 终端设备离开第一无线 IP接入网时， 如 果没有向 IP多媒体子系统 IMS网络注销该终端设备在该第一无线 IP接入网的 联系地址， 则通过该终端设备当前可用的接入网通知该 IMS 网络注销该终端 设备在第一无线 IP接入网的联系地址。 避免了终端设备以非正常方式离开无 线 IP接入网后， 该终端设备的后续呼叫仍然被根据该终端设备用户身份关联 的该 IP接入网联系地址， 从该无线 IP接入网下发该呼叫所带来的问题， 如下 发呼叫失败或者延长呼叫建立时间等。
附图说明
图 1是现有技术中终端设备进行 IMS注册的流程图；
图 2是现有技术中网络侧发起终端设备的 IMS注销的流程图；
图 3是根据本发明第一实施方式的注销无线 IP接入网联系地址的方法流 程图；
图 4是根据本发明第二实施方式的注销无线 IP接入网联系地址的方法流 程图；
图 5是根据本发明第四实施方式的无线 IP接入网的终端设备注销系统结 构图。
具体实施方式
为使本发明的目的、技术方案和优点更加清楚， 下面将结合附图对本发明 的实施方式作进一步地详细描述。
本发明第一实施方式涉及一种注销无线 IP接入网联系地址的方法。 在本 实施方式中， 第一无线 IP接入网为 WLAN网络， 其它接入网为 HRPD网络。 也就是说， 终端设备以非正常方式离开 WLAN 网络， 没有向 IMS 网络进行 WLAN网络的联系地址注销 , 但当前 HRPD网络可用 , 终端设备通过 HRPD 网络向 IMS网络进行 WLAN网络联系地址的注销。 其中， HRPD网络分配的 IP地址为 5555::1:2:3:4； WLAN网络分配的 IP地址为 5555::5:6:7:8。具体的注 销流程如图 3所示。
在步骤 301a至 301g中， 在检测到 WLAN网络的信号丢失后， 终端设备 通过 HRPD 网络发送 REGISTER (注册） 消息到为该 HRPD 网络服务的 P-CSCF2, 该 REGISTER消息经 I-CSCF发送到该终端设备所属的 S-CSCF。 该 REGISTER消息包含：
(Contact:<SIP:[5555::l:2:3:4]>;expires=7200;Contact:<SIP:[5555::5:6:7:8]>; expires=0),其中 Contact:<SIP: [5555 ::1 :2:3 :4]>； expires=7200指示向 IMS网络 重注册 HPRD 网络的 IP地址， 注册有效时间为 7200秒（即两个小时）； 而 Contact:<SIP:[5555::5:6:7:8]>; expires=0指示向 IMS网络注销 WLAN网络的 IP地址。 S-CSCF收到该 REGISTER消息后， 返回确认消息。 在本实施方式中， 该终端设备已向 S-CSCF订阅了用户的注册状态。
在步骤 302a至 302d中， S-CSCF更新该终端设备的注册状态， 更新后的 注册状态为 WLAN网络的联系地址已注销、 HPRD网络的联系地址已重注册， 并向终端设备发送 NOTIFY 消息， 通知该终端设备更新后的注册状态信息。 该终端设备收到该 NOTIFY后返回确认消息。
在步骤 303a和 303b中 , S-CSCF向为 HRPD网络服务的 P-CSCF2发送 NOTIFY消息， 以通知该终端设备所属用户的注册状态信息。 P-CSCF2收到该 NOTIFY消息后返回确认消息。
在 304a和 304b中， S-CSCF识别被注销的联系地址关联的 P-CSCF, 即为 WLAN网络服务的 P-CSCF1 , 向 P-CSCF1发送 NOTIFY消息， 以通知该终端 设备所属用户的注册状态信息。 P-CSCF1收到该 NOTIFY消息后返回确认消 息， 并指示 WLAN网络释放用户相关的无线接入资源， 并可能进一步根据该 注册状态信息删除该用户的注册信息。 或者是指示 WLAN网络释放用户相关 的无线接入资源，或根据该注册状态信息删除该用户的注册信息。从而避免了 终端设备以非正常方式离开 WLAN网络后，后续收到对该终端设备的呼叫时， 仍然根据该终端设备的用户身份关联的该 WLAN网络联系地址， 从该 WLAN 网络联系地址下发该呼叫所带来的问题，如下发呼叫失败或者延长呼叫建立时 间等， 同时避免 WLAN网络无线接入资源的浪费。
由于在现有技术中，重注册过程会将注册消息发送给 S-CSCF,而 S-CSCF 能够对用户注册进行更新， 如更新注册时间， 或者取消注册（即注销）， 并通 知 P-CSCF该用户的注册状态， 因此， 通过其它接入网发送的注册消息携带注 销该 WLAN网络联系地址的信息， 可以触发 S-CSCF识别被注销的联系地址 关联的 P-CSCF, 并发送注册状态信息到该 P-CSCF, P-CSCF根据该注册状态 信息删除该用户的注册信息， 并可能进一步指示 WLAN网络释放用户相关的 无线接入资源， 从而在终端设备以非正常方式离开 WLAN网络后， 也能够及 时进行注销， 避免该终端设备的后续呼叫仍从该 WLAN网络下发， 带来不必 要的问题， 同时也避免 WLAN网络无线接入资源的浪费。
需要说明的是，本实施方式中假定在重注册时， 网络侧不对该终端设备进 行认证， 省略了注册的相关步骤。 在实际应用中， 也可以根据现有技术对终端 设备进行认证， 并不影响本实施方式的效果。 另外， 在本实施方式中， 以第一 无线 IP接入网为 WLAN网络，其它接入网为 HRPD网络为例进行说明， 而在 实际应用中， 第一无线 IP接入网也可以是 HRPD 网络， 其它接入网可以是 WLAN网络， 具体实现方式与本实施方式类似， 在此不再赘述。
本发明第二实施方式同样涉及一种注销无线 IP接入网联系地址的方法。 本实施方式与第一实施方式不同，在第一实施方式中， 终端设备以非正常方式 离开 WLAN网络后 , 当前还有无线 IP接入网 （ HRPD网络）可用 , 从而终端 设备可以通过 HRPD网络的重注册过程， 进行 WLAN网络的注销； 而在本实 施方式中， 该终端设备以非正常方式离开 WLAN网络后 , 当前没有无线 IP接 入网可用， 只有 CDMAlx或 GSM等 CS 网络可用， 因此终端设备可以利用 CS网络的消息传输机制如短消息业务（ Short Message Service, 简称" SMS" ) 或非结构化补充业务数据 ( Unstructured Supplementary Services Data, 简称 "USSD" )通知 VCC AS "该终端设备已离开 WLAN网络" , 再由 VCC AS请求 S-CSCF发起对该终端设备的注销流程。 具体如图 4所示。 简单提一下， 这里 的其它网络单元可以是集中业务控制单元， 也就是说， 在终端设备通过 CS网 络也可以接入 IMS网络的场景下， 终端设备可以通知 CS网络到 IMS网络的 适配处理单元（即集中业务控制单元） "该终端设备已离开 WLAN网络，，， 再 由该集中业务控制单元请求 S-CSCF发起对该终端设备的注销流程。
下面对如图 4所示的注销无线 IP接入网联系地址的方法进行具体说明。 在步骤 401中， 终端设备在检测到 WLAN网络的信号丢失后， 将"该终端设备 已离开 WLAN网络"的信息作为 SMS消息的内容进行封装， 以 VCC AS为目 的地址发送该 SMS消息， 以通知该 VCC AS该终端设备离开了 WLAN网络。
在步骤 402a和 402b中， VCC AS收到该 SMS消息后， 确定该终端设备 已离开了 WLAN网络，通知 S-CSCF对该用户进行 WLAN网络联系地址的注 销。
VCC AS 通知 S-CSCF 的方式有很多种， 如发送 Message 消息请求该 S-CSCF 发起对该终端设备的注销流程， 或者， 发送 NOTIFY 消息通知 S-CSCF"该终端设备离开 IP接入网"。
S-CSCF收到该通知后返回响应消息。 在步骤 403a至 403c中， S-CSCF识别被注销的联系地址关联的 P-CSCF, 即 为 WLAN网络服务的 P-CSCF1，通过 P-CSCF1向该终端设备发送 NOTIFY消 息， 指示该终端设备已被取消 IMS注册。 因为 WLAN网络信号已丢失， 该终 端设备不会收到该 NOTIFY消息， P-CSCF1在等待终端设备的应答消息超时 后， 代理该终端设备向 S-CSCF返回 200 OK确认消息。
在步骤 404a和 404b中 , S-CSCF向 P-CSCF1发送 NOTIFY消息 ,指示该 终端设备已被取消注册， P-CSCF1收到该 NOTIFY消息后返回确认消息， 并 根据该 NOTIFY消息删除该用户的注册信息， 并可能进一步指示 WLAN网络 释放用户相关的无线接入资源。 从而避免了终端设备以非正常方式离开该 WLAN 网络后， 后续收到对该终端设备的用户公共身份的呼叫时， 仍然根据 该用户身份关联的该 WLAN网络联系地址，从该 WLAN网络下发该呼叫所带 来的问题， 如下发呼叫失败或者延长呼叫建立时间等。 同时， 避免 WLAN网 络无线接入资源的浪费。
在步骤 405a至 405c中， S-CSCF根据从 HSS下载的用户配置，进行 VCC AS所属的初始过滤标准检查， 在检查通过后向 VCC AS 进行第三方注册， 以 通知该 VCC AS"该终端设备已经取消 WLAN网络的 IMS注册"， 后续不可以 通过该 WLAN网络下发该终端设备的呼叫。 VCC AS收到后， 返回确认消息。
由于 S-CSCF主动发起 IMS注销对于本领域技术人员来说为已知技术，本 实施方式中只需通过 CS域消息通知与 S-CSCF连接（直接或间接连接） 的网 元该终端设备离开 WLAN网络这一状态，由该网元触发 S-CSCF主动发起 IMS 注销， 即可以避免终端设备以非正常方式离开 IP接入网后， 后续收到对该终 端设备的用户公共身份的呼叫时， 仍然根据该用户身份关联的该 WLAN网络 联系地址，从该 WLAN网络下发该呼叫所带来的问题，且由于上述消息和 IMS 注销过程均是现有的 , 使得本实施方式实现起来十分方便。
本发明第三实施方式同样涉及一种注销无线 IP接入网联系地址的方法， 与第一或第二实施方式大致相同， 其区别在于， 在第一或第二实施方式中， 终 端设备在检测到第一无线 IP接入网的信号丢失后， 立刻发起 IMS注销， 包括 通过其它接入网发起重注册过程、 或发送 CS域消息； 而在本实施方式中， 终 端设备在检测到第一无线 IP接入网的信号丢失后， 启动定时器， 如果定时器 超时前没有重新接入到第一无线 IP接入网， 即未重新检测到第一无线 IP接入 网的信号， 则进行 IMS注销。 通过设置定时器， 可以避免终端设备频繁地对 该第一无线 IP接入网进行 IMS注册和注销， 降低终端设备的能耗。
本发明第四实施方式涉及一种无线 IP接入网的终端设备注销系统， 如图 5所示， 包含至少一个终端设备， 以及该终端设备对应的 S-CSCF和 VCC AS。 该终端设备包含： 判断单元， 用于判断终端设备离开第一无线 IP接入网时， 是否已向 IMS网络注销该终端设备在该第一无线 IP接入网的联系地址； 注销 发起单元， 用于在该判断单元判定该终端设备没有向该 IMS 网络注销该终端 设备在该第一无线 IP接入网的联系地址时， 通过该终端设备当前可用的其它 接入网通知该 IMS网络注销该终端设备在第一无线 IP接入网的联系地址。 从 而避免了终端设备以非正常方式离开 IP接入网后， 后续收到对应该终端设备 的用户公共身份的呼叫时，仍然根据该用户身份关联的该 IP接入网联系地址， 从该 IP接入网下发该呼叫所带来的问题， 如下发呼叫失败或者延长呼叫建立 时间等。
其中， 注销发起单元通过该终端设备当前可用的其它接入网通知该 IMS 网络的 S-CSCF注销该终端设备在第一无线 IP接入网的联系地址。
在该终端设备当前可用的其它接入网为无线 IP接入网， 如 WLAN或 HRPD时， 该注销发起单元还可以包含以下子单元： 注销信息设置单元， 用于 在重注册过程的消息中设置注销第一无线 IP接入网的信息； 重注册子单元， 用于向当前可用的其它接入网发起重注册过程，通过该重注册过程的消息将注 销信息设置单元设置的注销第一无线 IP接入网的信息发送给该 S-CSCF。由于 在现有技术中， 重注册过程会将注册消息发送给 S-CSCF, 而 S-CSCF能够对 用户注册进行更新，如更新注册时间，或者取消注册（即注销），并通知 P-CSCF 该用户的注册状态， 促使 P-CSCF删除该用户的注册信息， 因此， 在终端设备 以非正常方式离开 IP接入网后， 该终端设备能够及时进行 IMS注销， 避免该 终端设备的后续呼叫仍从该 IP接入网下发， 带来不必要的问题。
或者，在该终端设备当前可用的其它接入网只剩 CS域网络，如 CDMA lx 网络或 GSM网络时， 该注销发起单元还可以包含以下子单元： 离开指示设置 单元， 用于在电路域消息中设置终端设备已离开第一无线 IP接入网的指示； 发送单元， 用于通过当前可用的其它接入网向 VCC AS发送该 CS域消息， 通 过该 CS域消息中设置的终端设备已离开第一无线 IP接入网的指示，触发 VCC AS指示该 S-CSCF注销该终端设备在第一 IP接入网的联系地址。 由于 CS域 消息是现有技术已有的，本实施方式在无需新增信令的情况下， 利用现有消息 触发 S-CSCF主动为该终端设备发起在 IMS网络注销第一无线 IP接入网的联 系地址， 在避免终端设备以非正常方式离开 IP接入网后， 其后续呼叫仍从该 IP接入网下发所带来的问题的同时， 使得本实施方式实现起来更为方便。 另 外， 本实施方式中的 CS域消息可以是现有的 SMS消息或 USSD消息。
该 S-CSCF包含： 接收单元， 用于通过当前可用的接入网接收注销终端 设备在第一无线 IP接入网的联系地址的通知； 注销单元， 用于在所述接收 单元收到注销终端设备在第一无线 IP接入网的联系地址的通知后， 注销该 终端设备在第一无线 IP接入网的联系地址。
所述接收单元通过以下方式从当前可用的接入网接收注销终端设备在 第一无线 IP接入网的联系地址的通知： 从该终端设备发起的其它无线 IP接 入网的重注册过程中接收注销第一无线 IP接入网的信息， 所述信息包括联系 地址等； 或者，从 VCC AS接收该终端设备已离开第一无线 IP接入网的指示。
该 VCC AS包含： 判断单元， 用于在收到来自终端设备的 CS域消息时， 判断该消息中是否包含该终端设备已离开第一无线 IP接入网的指示； 通知单 元， 用于在该判断单元判定该 CS域消息中包含该终端设备已离开该第一无线 IP接入网的指示时， 通知该 S-CSCF注销该终端设备在第一无线 IP接入网的 联系地址。
此外， 本发明实施例还提供一种终端设备， 包括： 判断单元和注销发起 单元， 其中， 所述判断单元， 用于判断所述终端设备离开第一无线 IP接入 网时， 是否已向 IMS网络注销该终端设备在该第一无线 IP接入网的联系地 址； 所述注销发起单元， 用于在所述判断单元判定所述终端设备没有向所 述 IMS网络注销该终端设备在该第一无线 IP接入网的联系地址时，通过该终 端设备当前可用的接入网通知该 IMS网络注销该终端设备在第一无线 IP接 入网的联系地址。 所述终端设备还包括：
优选的， 所述终端设备还包括： 确定单元， 用于确定所述终端设备离 开第一无线 IP接入网的时间是否超过预定时限，并将超过预定时限的结果发 送给判断单元。
需要说明的是，所述终端设备与上述图 5中所述的终端设备的功能和作用 相同， 具体详见上述， 在此不再赞述。
本发明实施例还提供一种基于 IP多媒体子系统的网络侧设备， 包括： 接 收单元和注销单元。 其中所述接收单元， 用于通过当前可用的接入网接收 终端设备已离开第一无线 IP接入网的指示； 所述注销单元， 用于在所述接 收单元收到所述终端设备已离开第一无线 IP接入网的指示后， 注销该终端 设备在第一无线 IP接入网的联系地址。 其中接收单元可以从所述终端设备 发起的其它无线 IP接入网的重注册中接收注销第一无线 IP接入网的信息， 或者从具有接收电路域消息的网元中， 接收注销终端设备在第一无线 IP接 入网的联系地址的通知。
需要说明的是， 所述网络侧设备与上述图 5中所述 S-CSCF的功能和作 用相同， 具体详见上述， 在此不再赞述。
本发明实施例还提供一种网元，该网元与 IMS网络的 S-CSCF连接，包括： 判断单元和通知单元。 其中所述判断单元， 用于在收到来自终端设备的电 路域消息时， 判断该消息中是否包括该终端设备已离开第一无线 IP接入网 的指示； 所述通知单元， 用于在所述判断单元判定所述电路域消息中包括 所述终端设备已离开所述第一无线 IP接入网的指示时， 通知所述 S-CSCF注 销该终端设备在第一无线 IP接入网的联系地址。
需要说明的是， 所述网元与上述图 5中所述 VCC AS的功能和作用相同， 在此不再赘述。
综上该， 在本发明的实施方式中， 终端设备离开第一无线 IP接入网时， 如果没有向 IMS网络注销该终端设备在该第一无线 IP接入网的联系地址， 则 通过该终端设备当前可用的其它接入网通知该 IMS 网络注销该终端设备在第 一无线 IP接入网的联系地址。从而避免了终端设备以非正常方式离开 IP接入 网后，后续收到对应该终端设备的用户公共身份的呼叫时，仍然根据该用户身 份关联的该 IP接入网联系地址 , 从该 IP接入网下发该呼叫所带来的问题 , 如 下发呼叫失败或者延长呼叫建立时间等。 终端设备向当前可用的其它接入网发起重注册过程，在该重注册过程中携 带注销第一无线 IP接入网的信息， 将注销第一无线 IP接入网的信息发送给该 S-CSCF; 该 S-CSCF根据该信息注销该终端设备在第一无线 IP接入网的联系 地址。由于在现有技术中，重注册过程会将注册消息发送给 S-CSCF,而 S-CSCF 能够为终端设备发起在 IMS网络注销某个 IP接入网的联系地址， 因此， 通过 在其它接入网的注册消息中携带注销第一无线 IP接入网的信息， 可以利用现 有的重注册过程触发 S-CSCF主动为该终端设备发起在 IMS网络注销第一无线 IP接入网的联系地址， 从而在终端设备以非正常方式离开第一无线 IP接入网 后，该终端设备能够及时进行注销，避免该终端设备的后续呼叫仍从该第一无 线 IP接入网下发， 带来不必要的问题。
在终端设备只有 CS域网络如 CDMA lx网络可用的情况下， 终端设备可 以通过该 CDMA lx网络向 VCC AS发送 CS域消息， 在该消息中指示该终端 设备已离开第一无线 IP接入网； 通过该消息触发 VCC AS指示该 S-CSCF为 该终端设备发起第一无线 IP接入网联系地址的注销过程。由于该 CS域消息是 现有技术已有的， 因此本发明实施方式可以在无需新增信令的情况下， 利用已 有信令触发 S-CSCF主动为该终端设备在 IMS网络注销第一无线 IP接入网的 联系地址， 在避免终端设备以非正常方式离开第一无线 IP接入网后， 其后续 呼叫仍从该 IP接入网的联系地址下发所带来的问题的同时， 使得本发明的实 施方式实现起来更为方便。
VCC AS可以通过将其收到的包含终端设备已离开第一无线 IP网络的指 示的 CS域消息直接发送给 S-CSCF, 触发 S-CSCF主动注销该终端设备在第 一无线 IP接入网的联系地址； 或者， VCC AS向 S-CSCF发送注销请求消息， 请求 S-CSCF注销该终端设备在第一无线 IP接入网的联系地址， 应用十分灵 活。
通过在进行注销前，设置定时器，可以避免频繁地对该终端设备在第一无 线 IP接入网的联系地址进行 IMS注册和注销。
虽然通过参照本发明的某些优选实施方式，已经对本发明进行了图示和描 述，但本领域的普通技术人员应该明白，可以在形式上和细节上对其作各种改 变， 而不偏离本发明的精神和范围。

Claims

权 利 要 求
1. 一种注销无线 IP接入网联系地址的方法， 其特征在于， 包括步骤： 终端设备离开第一无线 IP接入网时， 如果没有向 IP多媒体子系统 IMS 网络注销该终端设备在所述第一无线 IP接入网的联系地址， 则通过所述终端 设备当前可用的接入网通知所述 IMS网络注销所述终端设备在第一无线 IP接 入网的联系地址。
2. 根据权利要求 1所述的注销无线 IP接入网联系地址的方法， 其特征 在于， 通过所述终端设备当前可用的接入网通知所述 IMS网络注销所述终 端设备在第一无线 IP接入网的联系地址的方式为：
通过所述终端设备当前可用的接入网通知所述 IMS网络的服务呼叫会 话控制功能 S-CSCF注销该终端设备在第一无线 IP接入网的联系地址。
3. 根据权利要求 2所述的注销无线 IP接入网联系地址的方法， 其特征 在于， 所述当前可用的接入网是除所述第一无线 IP接入网外的其它无线 IP 接入网 , 则通过所述终端设备当前可用的接入网通知所述 IMS网络的 S-CSCF注销该终端设备在第一无线 IP接入网的联系地址的方式为：
所述终端设备向所述当前可用的其它无线 IP接入网发起重注册过程， 通过该重注册过程将携带注销第一无线 IP接入网的信息发送给所述 S-CSCF , 触发所述 S-CSCF注销该终端设备在第一无线 IP接入网的联系地 址。
4. 根据权利要求 3所述的注销无线 IP接入网联系地址的方法， 其特征 在于， 所述其它无线 IP接入网为： 无线本地接入网络或高速率分组数据网 络。
5. 根据权利要求 2所述的注销无线 IP接入网联系地址的方法， 其特征 在于， 所述当前可用的接入网是电路域网络， 则通过所述终端设备当前可 用的接入网通知所述 IMS网络的 S-CSCF注销该终端设备在第一无线 IP接入 网的联系地址的方式为：
所述终端设备通过所述电路域网络向与 S-CSCF连接的第一网元发送 指示该终端设备已离开所述第一无线 IP接入网的电路域消息；
所述第一网元根据所述电路域消息， 通知所述 S-CSCF注销该终端设备 在第一无线 IP接入网的联系地址。
6. 根据权利要求 5所述的注销无线 IP接入网联系地址的方法， 其特征 在于， 所述第一网元根据所述电路域消息， 通知所述 S-CSCF注销该终端设 备在第一无线 IP接入网的联系地址的方式为：
所述第一网元向所述 S-CSCF发送包括所述终端设备已离开所述第一 无线 IP接入网的指示的消息； 或者
所述第一网元向所述 S-CSCF发送请求注销所述终端设备在第一无线 IP接入网的联系地址的消息。
7. 根据权利要求 5所述的注销无线 IP接入网联系地址的方法， 其特征 在于， 所述电路域消息是短消息业务中的消息或非结构化补充业务数据中 的消息；
所述第一网元是语音呼叫连续性应用服务器 VCC AS。
8. 根据权利要求 5所述的注销无线 IP接入网联系地址的方法， 其特征 在于， 所述第一无线 IP接入网为： 无线本地接入网络或高速率分组数据网 络；
所述电路域网络为： 码分多址接入 CDMA lx网络或全球移动系统 GSM 网络。
9. 根据权利要求 2所述的注销无线 IP接入网联系地址的方法， 其特征 在于，在所述 S-CSCF注销所述终端设备在第一无线 IP接入网的联系地址后， 还包括步骤：
指示所述第一无线 IP接入网释放为所述终端设备分配的无线接入资 源； 和 /或
指示所述第一无线 IP接入网注销所述终端设备。
10. 根据权利要求 1至 9中任一项所述的注销无线 IP接入网联系地址的 方法， 其特征在于， 在所述终端设备离开第一无线 IP接入网后， 所述方法还 包括：
确定所述终端设备离开所述第一无线 IP接入网的时间超过预定时限， 则执行如果没有向 IP多媒体子系统 IMS网络注销该终端设备在所述第一无线 IP接入网的联系地址， 则通过所述终端设备当前可用的接入网通知所述 IMS网 络注销所述终端设备在第一无线 IP接入网的联系地址的步骤。
11. 一种终端设备， 其特征在于， 包括：
判断单元， 用于判断所述终端设备离开第一无线 IP接入网时， 是否已 向 IMS网络注销该终端设备在该第一无线 IP接入网的联系地址；
IMS网络注销该终端设备在该第一无线 IP接入网的联系地址时，通过该终端 设备当前可用的接入网通知该 IMS网络注销该终端设备在第一无线 IP接入 网的联系地址。
12. 根据权利要求 11所述的终端设备， 其特征在于， 所述注销发起单 元通知所述 IMS网络注销该终端设备在第一无线 IP接入网的联系地址的方 式为：
通知所述 IMS网络的 S-CSCF注销该终端设备在第一无线 IP接入网的联 系地址。
13. 根据权利要求 12所述的终端设备， 其特征在于， 所述当前可用的 接入网是除所述第一无线 IP接入网外的其它无线 IP接入网， 所述注销发起 单元包括：
注销信息设置单元 , 用于在重注册过程的消息中设置注销第一无线 IP 接入网的信息；
重注册子单元， 用于向所述当前可用的其它无线 IP接入网发起重注册， 通过该重注册的消息将所述注销信息设置单元设置的注销第一无线 IP接入 网的信息发送给所述 S-CSCF。
14. 根据权利要求 12所述的终端设备， 其特征在于， 所述当前可用的 接入网是电路域网络， 所述注销发起单元包括：
离开指示设置单元， 用于在电路域消息中设置所述终端设备已离开所 述第一无线 IP接入网的指示；
发送子单元， 用于通过所述电路域网络向与所述 S-CSCF连接的第一网 元发送所述电路域消息， 通过该电路域消息中设置的所述终端已离开所述 第一无线 IP接入网的指示， 触发所述第一网元指示所述 S-CSCF注销所述终 端设备在第一无线 IP接入网的联系地址。
15. 根据权利要求 14所述的终端设备， 其特征在于， 所述终端设备还 包括：
确定单元，用于确定终端设备离开第一无线 IP接入网的时间是否超过预 定时限， 并将超过预定时限的结果发送给判断单元。
16. 一种基于 IP多媒体子系统的网络侧设备， 其特征在于， 包括： 接收单元， 用于通过当前可用的接入网接收注销终端设备在第一无线
IP接入网的联系地址的通知；
注销单元， 用于在所述接收单元收到注销终端设备在第一无线 IP接入 网的联系地址的通知后， 注销该终端设备在第一无线 IP接入网的联系地址。
17. 根据权利要求 16所述的基于 IP多媒体子系统的网络侧设备， 其特 征在于， 所述接收单元从当前可用的接入网接收注销终端设备在第一无线 IP接入网的联系地址的通知为：
从所述终端设备发起的其它无线 IP接入网的重注册中注销终端设备在 第一无线 IP接入网的联系地址的通知； 或者
从具有接收电路域消息的网元中， 接收注销终端设备在第一无线 IP接 入网的联系地址的通知。
18. 根据权利要求 16所述的基于 IP多媒体子系统的网络侧设备， 其特 征在于， 所述基于 IP多媒体子系统的网络侧设备是 S-CSCF。
19. 一种网元， 该网元与 IMS网络的 S-CSCF连接， 其特征在于， 包括： 判断单元， 用于在收到来自终端设备的电路域消息时， 判断该消息中 是否包括该终端设备已离开第一无线 IP接入网的指示；
通知单元， 用于在所述判断单元判定所述电路域消息中包括所述终端 设备已离开所述第一无线 IP接入网的指示时， 通知所述 S-CSCF注销该终端 设备在第一无线 IP接入网的联系地址。
20. 根据权利要求 19所述的网元， 其特征在于， 所述网元是 VCC AS。
21. 一种无线 IP接入网的终端设备注销系统， 其特征在于， 至少包括： 终端设备， 以及所述终端设备对应的 S-CSCF, 其中，
所述终端设备， 用于在离开第一无线 IP接入网时， 若判定没有向 IMS 网络注销所述终端设备在该第一无线 IP接入网的联系地址时， 则通过该终 端设备当前可用的接入网通知该 IMS 网络注销该终端设备在第一无线 IP 接入网的联系地址；
所述 S-CSCF, 用于在接收到注销所述终端设备在第一无线 IP接入网的 联系地址的通知后， 注销该终端设备在第一无线 IP接入网的联系地址。
22. 根据权利要求 20所述的无线 IP接入网的终端设备注销系统， 其特征 在于， 还包括：
VCC AS, 用于在收到来自所述终端设备的电路域消息时， 在判断该消 息中包括该终端设备已离开第一无线 IP接入网的指示时， 通知所述 S-CSCF 注销该终端设备在第一无线 IP接入网的联系地址。
PCT/CN2008/070842 2007-04-30 2008-04-29 Method, apparatus and system for deregistering the connection address of wireless ip access network Ceased WO2008134975A1 (en)

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CN101299697A (zh) 2008-11-05
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US8279854B2 (en) 2012-10-02
ATE472889T1 (de) 2010-07-15

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