WO2010072149A1 - 实现用户设备切换的方法、装置及系统 - Google Patents
实现用户设备切换的方法、装置及系统 Download PDFInfo
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- WO2010072149A1 WO2010072149A1 PCT/CN2009/075845 CN2009075845W WO2010072149A1 WO 2010072149 A1 WO2010072149 A1 WO 2010072149A1 CN 2009075845 W CN2009075845 W CN 2009075845W WO 2010072149 A1 WO2010072149 A1 WO 2010072149A1
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- 238000000034 method Methods 0.000 title claims abstract description 195
- 230000008569 process Effects 0.000 claims abstract description 76
- 230000003993 interaction Effects 0.000 claims abstract description 71
- 238000007726 management method Methods 0.000 claims description 82
- 230000002452 interceptive effect Effects 0.000 claims description 41
- 238000012545 processing Methods 0.000 claims description 22
- 238000013468 resource allocation Methods 0.000 claims description 11
- 230000001960 triggered effect Effects 0.000 claims description 5
- 238000002360 preparation method Methods 0.000 claims description 4
- 230000004048 modification Effects 0.000 claims description 2
- 238000012986 modification Methods 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 20
- 230000004044 response Effects 0.000 description 16
- 102000018059 CS domains Human genes 0.000 description 15
- 108050007176 CS domains Proteins 0.000 description 15
- 230000011664 signaling Effects 0.000 description 12
- 230000008859 change Effects 0.000 description 11
- 230000007774 longterm Effects 0.000 description 6
- 238000010295 mobile communication Methods 0.000 description 5
- 238000012790 confirmation Methods 0.000 description 4
- 238000004891 communication Methods 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 238000012546 transfer Methods 0.000 description 3
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- 230000000737 periodic effect Effects 0.000 description 2
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Classifications
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- 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
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- 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
- H04W60/04—Affiliation to network, e.g. registration; Terminating affiliation with the network, e.g. de-registration using triggered events
Definitions
- LTE Long Term Evolution
- GPRS General Packet Radio Service
- UMTS Universal Mobile Telecommunications System
- the method is a packet switching network gateway (PDN-GW: Packet Data Network Gateway) in an EPS network connected to a mobile switching center of a traditional CS domain through an Interworking Functation (IFF) entity (
- PDN-GW Packet Data Network Gateway
- IFF Interworking Functation
- the IWF has the capability to simulate the Iu-CS/A interface. For example, the IWF configures the protocol stack corresponding to the Iu-CS/A interface. If the UE needs to communicate with the MSC, the UE first sends a message to the IWF. The IWF can convert the received message into a signaling format on the IU-CS/A interface and send it to the MSC to complete communication between the UE and the MSC. Similarly, the IWF can forward the message received from the MSC to the UE. In this communication mode, the LTE network acts as an interaction channel between the UE and the IWF.
- PDN-GW Packet Data Network Gateway
- IFF Interworking Functation
- the user equipment performs signaling and data interaction with the IWF through a logical concept interface Z1 (which can be understood as a reference point or an IP channel).
- a logical concept interface Z1 which can be understood as a reference point or an IP channel.
- the signaling or data interaction between the UE and the IWF is carried over the user plane tunnel of the EPS network, and then they are actually transmitted at the UE, the evolved base station (eNodeB), and the serving gateway (S-GW: Serving Gateway).
- PDN-GW Packet Data Network Gateway
- the signaling or data interaction between the UE and the IWF is not through the MME (Mobility Management Entity) in the architecture, that is, in the existing network architecture, the UE and the IWF are The interaction between the two is transparent to the MME.
- MME Mobility Management Entity
- the main technical problem to be solved by the embodiments of the present invention is to provide a method, a device, and a system for implementing user equipment handover, thereby ensuring normal operation of the user equipment handover procedure in a CSoEPS scenario.
- the embodiment of the invention provides a method for implementing user equipment switching, which includes:
- the mobile management entity obtains the address information of the interactive function entity registered by the user equipment by interacting with the functional entity in the network;
- the mobility management entity notifies the interaction function entity to perform handover processing according to the obtained interaction function entity address information.
- the embodiment of the invention further provides a system for implementing user equipment switching, the system comprising:
- a mobile management entity configured to: obtain, by interacting with a functional entity in the network, the address information of the interaction function entity registered by the user equipment, and notify the interaction function entity to perform handover processing according to the obtained interaction function entity address information;
- An interaction function entity configured to: after converting the handover notification sent by the mobility management entity into circuit switched domain handover information, send the circuit switched domain handover information to a mobile switching center, and receive the resource sent by the mobile switching center The assignment completion notification is forwarded to the mobility management entity.
- the embodiment of the invention further provides a mobility management entity, including:
- An address information obtaining module configured to acquire, by interacting with a functional entity in the network, an interaction function entity address information registered by the user equipment;
- a switching notification module configured to notify the interactive function entity to perform a handover process according to the interactive function entity address information acquired by the address information acquiring module.
- the embodiment of the invention further provides a user equipment, including:
- the address information obtaining module is configured to obtain the address information of the interactive function entity registered by the user equipment, and the address information reporting module is configured to: by using the interaction with the mobile management entity, the address information of the interactive function entity acquired by the address information obtaining module, Reported to the mobility management entity.
- An embodiment of the present invention further provides an interactive function entity, including:
- An address information reporting module configured to report the address information to the mobility management entity by interacting with the mobility management entity
- a handover processing module configured to perform handover processing according to the handover notification sent by the mobility management entity.
- the embodiment of the invention further provides a user server, including:
- the address information obtaining module is configured to obtain the address information of the interactive function entity registered by the user equipment, and the address information reporting module is configured to: by using the interaction with the mobile management entity, the address information of the interactive function entity acquired by the address information obtaining module, Reported to the mobility management entity.
- the mobility management entity obtains the address information of the interactive function entity registered by the user equipment by interacting with the functional entity in the network architecture, and according to the obtained Interacting the function entity address information, notifying the interaction function entity to perform handover processing, thereby ensuring that the mobility management entity can obtain the address information of the interaction function entity registered by the user equipment, ensuring that
- FIG. 1 is a schematic diagram of a network architecture in the prior art
- FIG. 2 is a schematic flowchart of implementing a UE handover method according to an embodiment of the present invention
- FIG. 3 is a schematic diagram 1 of a process for an MME to obtain IWF address information in the method according to the embodiment of the present invention
- FIG. 4 is a schematic diagram 2 of a process for an MME to obtain IWF address information in the method according to an embodiment of the present invention
- the method for obtaining the IWF address information by the MME in the method provided by the example is shown in FIG. 6 is a schematic diagram of the process of the MME acquiring the IWF address information in the method according to the embodiment of the present invention
- FIG. 7 is a schematic diagram of the method provided by the embodiment of the present invention
- FIG. 8 is a schematic diagram of a process of the MME acquiring the IWF address information in the method according to the embodiment of the present invention
- FIG. 9 is a schematic diagram of the MME acquiring the IWF address information in the method according to the embodiment of the present invention
- FIG. 10 is a schematic diagram of a process for an MME to obtain IWF address information in the method according to the embodiment of the present invention
- FIG. 11 is a schematic diagram of a process for an MME to obtain IWF address information in the method according to an embodiment of the present invention
- FIG. 13 is a schematic diagram of a process for an MME to obtain IWF address information in the method according to the embodiment of the present invention
- FIG. 10 is a schematic diagram of a process for an MME to obtain IWF address information in the method according to the embodiment of the present invention
- FIG. 11 is a schematic diagram of a process for an MME to obtain IWF address information in the method according to an embodiment of the present invention
- FIG. 14 is a schematic diagram of a process for an MME to obtain IWF address information in the method according to an embodiment of the present invention.
- the MME obtains the IWF address information in the method provided by the embodiment of the present invention.
- FIG. 16 is a schematic structural diagram of implementing a UE handover system according to an embodiment of the present invention.
- FIG. 17 is a schematic structural diagram of a mobility management entity according to an embodiment of the present disclosure.
- FIG. 18 is a schematic structural diagram of a user equipment according to an embodiment of the present disclosure.
- FIG. 19 is a schematic structural diagram of an interaction function entity according to an embodiment of the present invention.
- FIG. 20 is a schematic structural diagram of a user server according to an embodiment of the present invention.
- FIG. 21 is a schematic diagram of a process of a method according to an embodiment of the present invention.
- FIG. 22 is a schematic diagram of a process for implementing a UE handover method according to an embodiment of the present invention.
- FIG. 23 is a schematic structural diagram of a system according to an embodiment of the present invention.
- the embodiment of the present invention provides a method for implementing handover of a user equipment (UE: User Equipment), and a method for an address, by interacting with a function entity in a network architecture and a mobility management entity (MME: Mobility Management Entity)
- the MME obtains the address information of the interworking function (IWF) of the UE registration; the MME notifies the IWF to perform the handover process according to the obtained address information, thereby avoiding the problem that the UE cannot be switched in the prior art, and ensuring the network. Stable.
- IWF interworking function
- the implementation process of implementing the UE handover method may include: Step 201:
- the source-end evolved base station (eNodeB) receives the measurement report reported by the UE, and triggers the UE to learn from the long-term evolution plan ( LTE, Long Term Evolution)
- the network switches to the Global System of Mobile Communication (GERAN: GSM EDGE Radio Access Network) / UMTS Terrestrial Radio Access Network (UTRAN: UMTS Territorial Radio) Access Network) Network.
- GERAN Global System of Mobile Communication
- UTRAN UMTS Terrestrial Radio Access Network
- the technical processing means required for the handover is not limited in the embodiment of the present invention, and may be implemented by using any technical means according to actual needs.
- Step 202 The source eNodeB sends a handover request message to the MME.
- the cell carried in the handover request message indicates that the source MME needs to switch the LTE network service, such as voice service. Go to the CS domain of the GERAN/UTRAN network.
- Step 203 The MME obtains address information of the serving IWF (ie, the IWF registered by the UE) in the current network by interacting with the UE.
- the serving IWF ie, the IWF registered by the UE
- the UE may report the IWF address information registered by the UE to the non-access stratum (NAS: Non Access Stratum) message.
- NAS Non Access Stratum
- the MME so that the MME obtains the address information of the IWF registered by the UE.
- the IWF address information related to the embodiment of the present invention may be the IP address information of the IWF, or may be the identifier of the IWF (for example, "IWF ID” or "IWF Number”, etc.), the MME or the related network element. It can be addressed to the IWF via IWF address information.
- the trigger point for the UE to report the IWF address information to the MME may be specifically as follows:
- the UE may be triggered by a circuit (CS: Circuit Switched) service to report the address information of the IWF to the MME.
- CS Circuit Switched
- the UE can perform the service request process only when the UE is in the connected state, and the idle state UE needs to perform the service request process, that is, the UE state is transferred from the idle state to the connected state. Then, the method for implementing the UE handover provided by the embodiment of the present invention may carry the address information of the IWF in the service request (a type of the NAS message) involved in the execution of the service request process by the UE, and report the information to the IWF.
- the address information of the IWF in the service request (a type of the NAS message) involved in the execution of the service request process by the UE, and report the information to the IWF.
- the embodiment of the present invention may also use other NAS messages to report the IWF address information registered by the UE to the ⁇ E.
- a NAS message may be added to report the IWF address information, which is not limited by the embodiment of the present invention.
- the UE may also report the address information of the IWF to the MME actively after the registration of the IWF is completed.
- the UE may carry the address information of the IWF in the service request message or other NAS message, and report the information to the MME.
- the NAS message that can carry the IWF address information may include: an attach request, a tracking area update request (TAU Request), a service request (Service Request), a disconnect request (Detach Request), and a UE request.
- Request Bearer Resource Allocation Request Bearer Resource Release requested by the UE, PDN Connectivity Request (PDN Connectivity Request), PDN Disconnection Request (PDN Disconnection Request) ) and many more.
- Step 204 The MME sends a handover request message to the IWF according to the obtained IWF address information.
- the IWF is a service IWF in the EPS network.
- Step 205 The IWF receives the handover request message, and converts the handover request message into a CS domain handover request message, and sends the handover request message to the mobile switching center (MSC: Mobile Switch Center).
- MSC Mobile Switch Center
- the MSC is a serving MSC in the EPS network.
- Step 206 Perform resource allocation between the MSC and the target base station subsystem (BSS: Base Station Subsystem).
- BSS Base Station Subsystem
- Step 207 The MSC notifies the IWF that the resource allocation is completed.
- Step 208 The IWF notifies the MME that the target side resource establishment is completed.
- Step 209 The MME notifies the source eNodeB that the handover preparation is completed.
- Step 210 The source eNodeB notifies the UE to switch to the target network.
- Step 211 The UE accesses the GERAN network, and completes handover from the LTE network to the GERAN/UTRAN network CS domain.
- the MME can obtain the address information of the IWF registered by the UE, and the MME obtains the address information of the IWF registered by the UE by using a functional entity in the network architecture, for example, the UE interacts with the MME.
- the address information is used to notify the IWF to perform handover processing, thereby ensuring normal operation of the user equipment handover process in the CSoEPS scenario.
- the MME needs to update the IWF address information registered by the UE, and then the UE may actively initiate the NAS message when the IWF changes.
- the MME is notified of the changed IWF address information.
- the process can be specifically as shown in FIG. 4, including:
- Step 401 The UE sends an update request to the source side IWF (ie, the IWF registered by the UE before the change).
- Step 402 The source-side IWF is unable to continue to provide services for the UE, and therefore sends a registration reset request to the UE, and provides related information (including address information) of the target-side IWF (ie, the IWF registered by the UE after the change) to the UE.
- related information including address information
- Step 403 The UE may select the target side IWF as the service IWF, and send a registration request to the target side IWF.
- the UE may report the address information of the target side IWF to the MME by using the existing NAS message or the newly added NAS message. Therefore, after the MME obtains the change, the IWF address information of the service is provided for the UE.
- the IWF may obtain the address information of the MME by interacting with the UE or the Home Subscriber Server (HSS). The IWF registers with the MME according to the obtained address information, so that the MME obtains the address information of the IWF registered by the UE.
- HSS Home Subscriber Server
- the specific form of the MME address information that is preferably applied in the embodiment of the present invention may be a Globally Unique Temporary Identity (GUTI) or an MME Identity (ID).
- the GUTI is a temporary identifier assigned by the MME to the user, and contains information about the ⁇ E ID, which can be used to address the MME.
- the IWF can obtain the MME ID by parsing the GUTI, and find the MME by using the MME ID, and then the address information of the IWF can be registered in the MME.
- the embodiment of the present invention does not exclude the expression of using other MME address information. For example: Use the IP address information of the MME.
- Step 501 The UE provides the address information of the MME to the IWF during the interaction with the IWF.
- the interaction scenario in which the UE provides the MME address information to the IWF may specifically include any one or all of the following:
- the specific manifestation may be: a UE-IWF DISCOVERY REQUEST, or a UE-IWF REGISTER REQUEST, in which the UE initiates a registration procedure to the IWF, the message carries the GUTI Or MME ID information.
- the embodiment of the present invention does not exclude the related information involved in the interaction with the IWF, and also carries the GUTI or MME ID information.
- the "UE-IWF REGISTER UPDATE UPLINK" message carries the GUTI or MME ID information; in addition, in the already defined periodic update process, the UE sends the "UE-IWF keep-alive message to the IWF ( UE-IWF KEEP ALIVE) , , the message carries the GUTI or MME ID information.
- the specific manifestation may be: in the UE-IWF connection establishment process, the UE sends a UE-IWF request (UE-IWF REQUEST) to the IWF, and the message carries the GUTI or MME ID information; In the UE-initiated CS signaling connection process, the UE-IWF UL DIRECT TRANSFER message sent by the UE to the IWF carries the GUTI or MME ID information.
- the UE In case the UE has already registered to the served IWF, if the UE receives the GUTI or MME ID information (for example, if the MME is changed), the UE sends a message to the IWF, for example, "UE-IWF registration" Update the uplink message (UE-IWF REGISTER UPDATE UPLINK), where the updated GUTI or MME ID information is carried.
- UE-IWF registration Update the uplink message (UE-IWF REGISTER UPDATE UPLINK), where the updated GUTI or MME ID information is carried.
- the IWF finds that the address information of the MME is saved.
- the IWF addresses the MME pointed to by the new address and initiates a registration procedure to the MME.
- the UE uses the signaling interaction with the IWF to transmit the MME address information to the IWF.
- the UE does not use the signaling interaction mode, but places the MME address information in a data packet, and uses the IWF as a destination to transmit the data packet carrying the MME address information to the IWF.
- the IWF parses the data packet to obtain the address information of the MME.
- the triggering condition for the UE to send a data packet to the IWF may be specifically as described above 1), 2), 3).
- Step 502 The IWF obtains the MME address information of the current serving UE, sends the registration information (including the IWF address information) to the MME, and registers itself with the MME, so that the MME obtains the address information of the IWF.
- the embodiment of the present invention may be specifically configured as shown in FIG. 6 by the IWF.
- the method includes: Step 601: The IWF requests the HSS to register the MME address information of the UE.
- the IWF and the IWF are An interface is added between the HSSs to enable signaling interaction between the IWF and the HSS.
- the embodiment of the present invention is not limited to the processing means for adding an interface.
- the trigger point for the IWF to request the UE to register the MME address information of the HSS may be the manner in which the UE completes the IWF registration process (including the IWF change of the service), or is triggered by the service of the CS domain.
- the IWF may send an MME Request message to the HSS, and request the MME address information registered by the UE from the HSS.
- Step 602 The HSS returns, to the IWF, the MME address information registered by the UE.
- the HSS may return the address information registered by the UE to the IWF by sending an "MME Address Request Response Message" (MME Response).
- MME Response MME Address Request Response Message
- Step 603 The IWF sends the registration information (including the IWF address information) to the MME according to the MME address information of the current UE that is obtained from the HSS, and registers the self with the MME, so that the MME obtains the address information of the IWF.
- the MME performs step 604 to reply to the IWF with a registration response.
- the IWF address information may be registered in the HSS by the MSC in the process of registering with the HSS, or the IWF itself initiates the registration process to the HSS, and the IWF is used.
- the address information is registered in the HSS.
- the ISF address information is then sent to the MME as the subscription data by the HSS, so that the MME obtains the IWF address information registered by the UE.
- the embodiment of the present invention may be attached. As shown in FIG. 7, the specific may include:
- Step 701 The UE sends a location update request (LAU Request) message to the MSC through the IWF.
- LAU Request location update request
- Step 702 The MSC sends an update location message to the HSS, where the message carries the address information of the IWF registered by the UE (IWF
- two scenarios may be involved. One is that when the MSC finds that the IWF changed by the UE, the MSC needs to trigger the sending of the update location message to the HSS, and the other is that when the UE first registers with the MSC, the MSC needs to trigger the direction.
- the HSS sends an update location message.
- Step 703 The HSS returns an update location confirmation message to the MSC.
- Step 704 The MSC returns an update location confirmation message to the UE.
- Step 705 when the HSS finds that the IWF information is updated, including the IWF change registered by the UE or the UE is initially registered to the MSC.
- the HSS inserts subscription data into the registered network element, such as the MME, and the subscription data carries the IWF address information currently registered by the UE.
- Step 706 The MME replies to the HSS by inserting a subscription data confirmation message.
- the IWF is a function of simulating the Iu-CS/A interface
- RNS Radio Network Subsystem
- BSS Base Station Subsystem
- the IWF needs to provide information to the MSC at the same time as the function of the simulated Iu-CS/A interface, indicating that the IWF is connected instead of the RNS/BSS at this time, that is, the Iu-CS is simulated at this time.
- the /A interface message needs to carry information indicating that the associated entity is the IWF.
- the present invention is not limited to the form of the specific indication information.
- the IWF informs the MS of its own address information (:. After receiving the message with the address information, the MSC considers that it is associated with an IWF, and subsequently registers the IWF address with the HSS. BP The MSC needs to perceive the IWF.
- the address information of the IWF may directly be part of the subscription data of the UE (for example, the user has already signed the IWF information used in the network when signing the contract.
- This way can be regarded as static IWF subscription information.
- the above scheme as shown in FIG. 7 can be regarded as dynamic IWF subscription information).
- the HSS sends the address information of the IWF to the MME as part of the subscription data of the UE.
- the MME served by the UE changes, the new MME initiates registration with the HSS.
- the HSS sends the address information of the IWF to the newly registered MME as part of the UE's subscription data.
- the MME saves the address information of the IWF in the context of the UE.
- the source MME transmits the IWF address information to the target MME.
- Step 801 The UE initiates a registration request to the IWF.
- Step 802 The IWF sends a registration request to the HSS.
- the registration request message includes the IWF ID information (IWF ID), which can help the HSS address the registration.
- IWF ID IWF ID information
- the registration request may specifically be a clear UE message (Purge UE).
- the HSS returns a registration response to the IWF. For example, clear the UE acknowledgment message (Purge UE Ack).
- the HSS can also delete the previously saved IWF information registered by the UE before the change.
- Step 804 the IWF returns a registration response to the UE.
- Step 805 When the HSS finds that the IWF information is updated, the HSS inserts the subscription data into the registered network element, such as the MME, and the subscription data carries the IWF address information currently registered by the UE.
- the HSS inserts the subscription data into the registered network element, such as the MME, and the subscription data carries the IWF address information currently registered by the UE.
- Step 806 The MME replies to the HSS to insert the subscription data confirmation information.
- the HSS actively sends the IWF address information to the MME.
- the MME may also actively query the HSS for the IWF address information. .
- the MME when the MME needs to interact with the IWF, the MME queries the HSS for the IWF address information registered by the UE.
- the specific MME may request the UE to register the IWF address information by sending an "IWF Address Request message (IWF Request) to the HSS.
- the subsequent HSS may send the "IWF Address Request Response Message (IWF Response), , to the MME.
- IWF may send the address information to the packet data network gateway by using a policy and a charging rule function (PCRF: Polic icy Charging Rules Function).
- PCRF Polic icy Charging Rules Function
- PDN-GW Packet Data Network Gateway
- P-GW Packet Data Network Gateway
- the embodiment of the present invention may specifically include:
- step 1001 the IWF triggers the PCRF to initiate a session modification (IP-CAN) process.
- IP-CAN session modification
- the IWF provides IWF address information to the PCRF.
- Step 1002 The PCRF provides a policy and charging control (PCC: Polic Charging Control) policy to the PDN GW, and delivers the IWF address information to the PDN GW.
- PCC Polic Charging Control
- the above transfer method can include IWF address information in policy and charging control (PCC: Policy Charging)
- PCC Policy Charging
- the IWF address information can also be carried as a cell in the message.
- Step 1003 The PDN GW sends a create bearer request message to the serving gateway (S-GW: Serving Gateway), where the message carries the IWF address information.
- S-GW Serving Gateway
- Step 1004 The S-GW sends a create bearer request message to the MME, where the message carries the IWF address information.
- the PDN GW in the embodiment of the present invention transmits the IWF address information to the MME by creating a bearer request message, and does not exclude the IWF address information from being carried to the MME by other messages, for example, updating the bearer request message (Update Bearer Request) ), delete the Bearer Request message (Delete Bearer Request).
- the UE initiates an attach procedure or a tracking area update procedure, and the IDN address information is provided by the PDN GW, and the IWF address information is sent to the UE by the MME, so that the MME is enabled. Obtain the address information of the IWF registered by the UE.
- the process of the embodiment of the present invention may specifically include:
- Step 1101 The UE sends an attach request or a tracking area update request (TAU Request) to the MME, where the message carries capability information of whether the UE supports the "Chip Switched Domain Connection Evolved Packet Network" (CSoEPS); or carries an indication information, such as " The circuit switched domain connection evolves the packet network indication ("CSoEPS indication” or "IWF Address Information", (IFF Addres s) cell, indicating that the network side transmits the IWF address to the UE; for the EPS network supporting CSoEPS, it may be required in the cell
- the broadcast message supports the CSoEPS capability information. For the CSoEPS-enabled terminal, if the network also supports CSoEPS, the network side will report whether to support the CSoEPS capability information or request the IWF address.
- Step 1102 The MME obtains the capability information of the UE to support the CSoEPS, or sends a default bearer setup request message (corresponding to the attach procedure) or the bearer creation according to the indication information "CSoEPS indication" or "IWF Address” message reported by the UE. / Update request message (corresponding to the tracking area update process) to the S-GW.
- the message carries an indication message, such as a "CSoEPS indication” or an "IWF Address” cell, indicating that the P-GW provides the IWF address.
- Step 1103 The S-GW forwards a default bearer setup request message (corresponding to an attach procedure) or a bearer create/update request message (corresponding to a trace area update procedure) to the PDN GW.
- Step 1104 The PDN GW provides the IWF address information to the MME according to the "CSoEPS indication" or "IWF Address" cell included in the received message.
- the PDN GW sends a Create Default Bearer Response message to the S-GW, where the response message includes IWF address information.
- the method for the PDN GW to obtain the UE serving IWF address information may be an operator configuration. For example, the operator configures a list of available IWF addresses, and the PDN GW selects an appropriate IWF from the list according to the load condition of the response.
- Step 1105 The S-GW forwards the response message to the MME, where the message carries the IWF address.
- Step 1106 The MME sends an Attach Receive message or a Tracking Area Update Receive message to the UE, where the message carries the IWF address information to the UE.
- the MME that has acquired the IWF address information registered by the UE saves the address information of the IWF in the context of the UE; when the MME changes, the source side The MME delivers the IWF address information to the target side MME. Therefore, the MME of the current serving UE obtains the IWF address information registered by the UE.
- the embodiment of the present invention may specifically include:
- Step 1201 When the MME that has obtained the IWF address information registered by the UE changes, the source MME transmits the IWF address information to the target side E.
- the IWF address information may be carried in the message context request or the reset request message. It can be expressed as a separate cell "IWF Address" in the message, or as context information of the UE, stored in the context of the UE, and transmitted from the source side MME (pre-change ⁇ E) to the target side MME in the message ( After the change, ⁇ E).
- Step 1202 The target side MME returns a response message to the source side MME.
- Step 1203 The source side MME returns an acknowledgement message to the target side MME.
- the MME initiates a process of registering the IWF registered with the UE (including the MME that is initially registered by the UE and the MME after the change), then the UE may register the IWF. Obtaining the MME address information registered by the UE, so that the subsequent IWF can actively interact with the MME.
- the embodiment of the present invention obtains the formula of the IWF address information served by the UE, which may be the manner described in any of the foregoing embodiments.
- Step 1301 The MME registers the IWF with the UE, and sends a registration message.
- the message carries the MME address information registered by the UE.
- the address information may be the IP address information of the MME, or may be an MME identifier, or may be a temporary identifier of the MME, such as GUTI, which can represent the MME address.
- the embodiment of the present invention is not limited.
- the function of the message is: providing information about the MME registered by the UE to the IWF, and ensuring that the IWF is available for addressing ⁇ E.
- Step 1302 The IWF returns a registration response message to the MME.
- the process in which the target MME registers the IWF to register with the UE after the update may include the following scenarios:
- Scenario 1) When the MME changes, the source MME forwards the IWF address to the target MME, and the target MME actively registers with the IWF, and the IWF updates the MME address information.
- Scenario 2 When the MME changes, the source MME transmits the target MME address to the IWF, and the IWF completes the process of registration to the target MME, and then the target MME obtains the IWF address information acquired when the IWF is registered. The IWF initiates a registration process.
- the method includes:
- Step 1401 When the MME changes, the source MME transmits the already obtained IWF address information of the UE to the target side ⁇ E.
- the IWF address information may be carried in a message context request or a reset request message.
- the expression may be a single cell in the message, or may be stored as the context information of the UE in the context of the UE, and transmitted from the source side MME1 to the target side MME in the message.
- Step 1402 The target side MME returns a response message to the source side MME.
- Step 1403 The source side MME returns an acknowledgement message to the target side MME.
- Step 1404 the target side MME completes the registration to the IWF.
- Step 1405 The IWF sends a registration response to the target side MME.
- the method includes:
- Step 1501 When the MME changes, the source MME transmits the address information of the target MME to the IWF by sending a message, such as a reset request message.
- Step 1502 The IWF returns a response message to the source side MME.
- Step 1503 The IWF completes registration in the target side MME by sending a registration message to the target side MME.
- the message carries the IWF address information.
- Step 1504 The target MME performs registration according to the obtained IWF address information.
- the MME can obtain the address information of the IWF registered by the UE by using the function entity in the network architecture to interact with the MME, and the MME notifies the address information according to the obtained address information.
- the IWF performs the handover process to ensure the normal operation of the user equipment handover process in the CSoEPS scenario.
- an interface is set between the IWF and the HSS, so that the interactive functional entity can pass The interface is added to implement signaling interaction with the home subscriber server.
- the IWF can also learn the address information of the MME, which facilitates the IGW to actively initiate signaling interaction with the MME as needed.
- the embodiment of the present invention further provides a system for implementing user equipment handover.
- the system is specifically as shown in FIG. 16, and includes: a user equipment 1601 (UE: User Equipment), an evolved base station 1602 (eNodeB), and a mobility management entity. 1603 (MME: Mobility Management Entity), Interworking Function 1604 (IWF: Interworking Function), Mobile Switching Center 1605 (MSC: Mobile Switch Center) and Target Base Station Subsystem 1606 (BSS: Base Station Subsystem).
- UE User Equipment
- eNodeB evolved base station
- MME Mobility Management Entity
- IWF Interworking Function
- MSC Mobile Switch Center
- BSS Base Station Subsystem
- the specific operations of the system can include:
- the base-end evolved base station 1602 receives the measurement report reported by the UE 1601, and triggers the UE 1601 to switch from the Long Term Evolution (LTE) network to the edge wireless connection of the Global System of Mobile Communication (GSM).
- GSM Global System of Mobile Communication
- GERAN GSM EDGE Radio Access Network
- UTRAN UMTS Territorial Radio Access Network
- the source eNodeB 1602 sends a handover request message to the MME 1603.
- the cell carried in the handover request message indicates that the source MME needs to switch the LTE network service to the CS domain of the GERAN/UTRAN network.
- the serving IWF 1604 ie, the IWF registered by the UE
- the current network such as the UE 1601.
- the MME 1603 notifies the IWF 1604 to perform handover processing based on the acquired IWF 1604 address information. Specifically, the MME 1603 may notify the IWF 1604 to perform handover processing by sending a handover request message.
- the IWF 1604 receives the handover request message and converts the handover request message into a handover request message of the CS domain, and transmits it to the MSC 1605.
- Resource allocation is performed between the MSC 1605 and the BSS 1606.
- the MSC 1605 notifies the IWF 1604 that the resource allocation is complete.
- IWF1604 informs ⁇ E1603 that the target side resource establishment is completed.
- the MME 1603 notifies the source eNodeB 1602 that the handover preparation is complete.
- the source eNodeB 1602 notifies the UE 1601 to switch to the target network.
- the UE 1601 accesses the GERAN network and completes handover from the LTE network to the CS domain of the GERAN/UTRAN network.
- the implementation of the UE handover system enables the MME to obtain the address information of the IWF registered by the UE by using the functional entity in the network architecture to interact with the MME; the MME notifies the obtained information according to the obtained address information.
- the IWF performs the handover process to ensure the normal operation of the user equipment handover process in the CSoEPS scenario.
- the embodiment of the present invention further provides a Mobility Management Entity (MME) for acquiring a mutual functional entity registered by a User Equipment (UE: User Equipment) by interacting with a functional entity in the network architecture (IWF: Interworking) The address information of the Function, and sends the switching information to the IWF according to the obtained IWF address information.
- MME Mobility Management Entity
- the MME provided by the embodiment of the present invention may specifically include:
- the address information obtaining module 1701 is configured to obtain the IWF address information registered by the UE by interacting with a functional entity in the network architecture.
- the handover notification module 1702 is configured to notify the interaction function entity to perform handover processing according to the interaction function entity address information acquired by the address information acquisition module 1701.
- the specific handover notification may be a handover request message, and the information carried in the handover request message may be any information required for the UE to be switched, which is not limited by the embodiment of the present invention.
- the MME provided by the embodiment of the present invention acquires the address information of the IWF registered by the UE by interacting with the functional entity in the network architecture, and notifies the IWF to perform handover processing according to the obtained address information, thereby ensuring In the CSoEPS scenario, the UE handover process proceeds normally.
- the embodiment of the present invention further provides a User Equipment (UE: User Equipment) for interacting with a Mobility Management Entity (MME), so that the MME obtains an interworking function (IWF: Interworking Function) registered by the UE. Address information.
- UE User Equipment
- MME Mobility Management Entity
- the UE provided by the embodiment of the present invention may specifically include:
- the address information obtaining module 1801 is configured to obtain IWF address information registered by the UE.
- the address information reporting module 1802 is configured to report the address information of the IWF obtained by the address information acquiring module 1801 to the MME by interacting with the MME.
- the UE involved in the embodiment of the present invention may report the IWF address information registered by the UE to the MME by sending a non-access stratum (NAS: Non Access Stratum) message, or initiate an attach procedure or a tracking area update process by the PDN.
- the GW provides the IWF address information, and sends the IWF address information to the UE through the MME, so that the MME obtains the address information of the IWF registered by the UE.
- NAS Non Access Stratum
- the UE provided by the embodiment of the present invention interacts with the MME in the network architecture, so that the MME obtains the address information of the IWF registered by the UE, thereby ensuring the normal handover process of the UE in the CSoEPS scenario.
- the embodiment of the present invention further provides an Interworking Function (IWF) for interacting with a Mobility Management Entity (MME) to enable the MME to acquire an IWF registered by a User Equipment (UE: User Equipment). Address information.
- IWF Interworking Function
- MME Mobility Management Entity
- UE User Equipment
- the IWF provided by the embodiment of the present invention may specifically include:
- the address information reporting module 1901 is configured to report the self address information to the MME by interacting with the MME.
- the handover processing module 1902 is configured to perform handover processing according to the handover notification sent by the MME.
- the IWF according to the embodiment of the present invention may be configured to obtain the address information of the MME by interacting with the UE or the home subscriber server (HSS: Home Subscriber Server), and register with the MME according to the obtained address information, so that the MME obtains
- HSS Home Subscriber Server
- the address information of the IWF registered by the UE, or the address information of the IWF is sent to the Packet Data Network Gateway (PDN-GW: Packet Data Network Gateway) through the Policy and Charging Rules Function (PDF)
- PDN-GW Packet Data Network Gateway
- PDF Policy and Charging Rules Function
- the GW initiates a bearer activation process, and brings the IWF address to the MME in the request message, so that the MME obtains the address information of the IWF registered by the UE.
- PDN-GW Packet Data Network Gateway
- PDF Policy and Charging Rules Function
- the IWF provided by the embodiment of the present invention interacts with the MME in the network architecture, so that the MME obtains the address information of the IWF registered by the UE, thereby ensuring the normal handover process of the UE in the CSoEPS scenario.
- the embodiment of the present invention further provides a user server (HSS: Home Subscriber Server), which is configured to interact with a mobility management entity (MME: Mobility Management Entity), so that the MME obtains the IWF registered by the user equipment (UE: User Equipment). Address information.
- HSS Home Subscriber Server
- MME Mobility Management Entity
- the HSS provided by the embodiment of the present invention may specifically include:
- the address information obtaining module 2001 is configured to obtain IWF address information registered by the UE.
- the address information reporting module 2002 is configured to report the IWF address information obtained by the address information obtaining module 2001 to the MME by interacting with the MME.
- the HSS may obtain the IWF address information sent by the MSC or the process initiated by the IWF itself to obtain the IWF address information in the process of receiving the registration of the Mobile Management Center (MSC: Mobile Switch Center).
- MSC Mobile Management Center
- the IWF address information that is obtained is sent to the MME as the subscription data, so that the E obtains the IWF address information registered by the UE.
- the HSS provided by the embodiment of the present invention interacts with the MME in the network architecture, so that the MME obtains the address information of the IWF registered by the UE, thereby ensuring the normal handover process of the UE in the CSoEPS scenario.
- the channel between the UE and the IWF involved in the foregoing embodiment of the present invention is provided by the EPS network in the CSoEPS scenario.
- the channel between the UE and the IWF may also be provided by a network such as GERAN/UTRAN.
- the functional device that needs to obtain the IWF address information also includes the serving GPRS support node in the GERAN/UTRAN network (SGSN: Functional devices such as Serving GPRS Support Node). Then, for the SGSN to obtain the IWF address, the method for obtaining the IWF address information provided by the embodiment of the present invention can be used, but the functional device MME is replaced by the SGSN, and the specific implementation process is unchanged.
- SGSN Serving GPRS Support Node
- the method for obtaining the IWF address information provided by the embodiment of the present invention can obtain the IWF address information by using the method for obtaining the IWF address information provided by the embodiment of the present invention. This also reflects that the method for obtaining IWF address information provided by the embodiment of the present invention has strong compatibility, scalability, and portability.
- a solution is provided, where the UE provides the MME address information to the IWF, and the IWF can obtain the MME IP address information by performing DNS resolution on the MME address information provided by the UE.
- the MME address information may be a GUTI or a GUMMEI, where the GUTI or the GUMMEI includes an MME ID (MME identity), and the IWF performs DNS resolution according to the MME ID to obtain the MME IP address.
- Another embodiment of the present invention may be specifically as shown in FIG. 21, including:
- Step 2101 The UE provides the address information of the MME to the IWF during the interaction with the IWF.
- the interaction scenario in which the UE provides the MME address information to the IWF may specifically include any one or all of the following: 1) In the process of the UE registering with the IWF (including the initial registration process, or the IWF of the service changes, the process of re-registering to the new IWF).
- the specific manifestation may be: a UE-IWF DISCOVERY REQUEST, or a UE-IWF REGISTER REQUEST, in which the UE initiates a registration procedure to the IWF, the message carries the GUTI Or GUMMEI information.
- the embodiment of the present invention does not exclude the related information involved in the interaction with the IWF, and also carries the GUTI or GUMMEI information.
- the "UE-IWF REGISTER UPDATE UPLINK" message carries the GUTI or GUMMEI information; in addition, in the already defined periodic update process, the UE sends the UE-IWF keep-alive message to the IWF (UE -IWF KEEP ALIVE),, the message carries GUTI or GUMMEI information.
- the service triggering in the CS domain for example, the UE acts as the calling party to trigger the CS service, or the UE receives the CS service as the called party.
- the specific manifestation may be: in the UE-IWF connection establishment process, the UE sends a UE-IWF request (UE-IWF REQUEST) to the IWF, and the message carries the GUTI or GUMMEI information; In the UE-initiated CS signaling connection process, the UE-IWF UL DIRECT TRANSFER message sent by the UE to the IWF carries the GUTI or GUMMEI information.
- the UE In case the UE has already registered to the served IWF, if the UE receives the GUTI or GUMMEI information allocated by the MME (for example, if the MME changes), the UE sends a message to the IWF, for example "UE-IWF registration update"
- the uplink message (UE-IWF REGISTER UPDATE UPLINK), in, carries the updated GUTI or GUMMEI information.
- the IWF saves the address information of the MME, when the IWF finds that the address information of the MME is changed, the IWF addresses the MME pointed to by the new address, and initiates a registration procedure to the MME.
- the triggering condition for the UE to send a data packet to the IWF may be specifically as described above 1), 2), 3).
- Step 2102 The IWF obtains the MME address information of the current serving UE, and the H0SF is addressed to the H0SF according to the MME address information, so that the H0SF obtains the address information of the IWF. For subsequent handover, the H0SF can address the IWF of the serving UE.
- the specific process is as shown in Fig. 22.
- the method of addressing the HOSF according to the MME address information may be, according to the information provided by the UE in step 1 (for example:
- GUTI Performs DNS resolution to obtain the address information (for example, IP address information) of the H0SF. If the parsing obtains multiple HOSF address information, the IWF may initiate a registration procedure to the plurality of HOSFs. The registration message may carry, the IWF address information, the user identifier (top SI and/or GUTI information). The difference between the method of addressing the HOSF according to the MME address information and the addressing of the MME according to the MME address information is that the former also needs the DNS server to configure the association relationship between the HOSF and the MME, and the DNS server provides the GUTI information provided by the IWF (including the MME ID information).
- the IWF including the MME ID information
- the address information (IP address) of the HOSF is returned to the IWF through the association information of the MME and the HOSF.
- the latter identifies the information of the corresponding MME through the GUTI information (including the MME ID information), and then returns the address information (IP address) of the MME to the IWF.
- the pre-configured information on the IWF is queried to find the information of the HOSF associated with the MME information. If the parsing obtains multiple H0SF address information, the IWF may initiate a registration process to the plurality of HOSFs.
- the registration message can be carried, IWF address information, user ID (B1SI and or GUTI information).
- H0SF is a logical functional entity, and the present invention does not exclude the physical integration of the HOS with a mobility management entity (e.g., may be an MME). If this is the case, the IWF obtains the MME address information of the current serving UE, and the addressing H0SF is actually addressing the MME. See Embodiment 5.
- Step 2103 The IWF interacts with the MME. This can include the following two methods:
- Step 2103a The HOSF saves the MME address information (for example, GUTI) provided by the IWF.
- the HOSF may forward the message to the UE.
- the method of the HOSF addressing the MME may be: performing DNS resolution according to the MME address information (for example, GUTI), and obtaining address information (for example, IP address information) of the MME.
- the specific manner for the IWF to provide the MME address information to the HOSF may be: the H0SF receives the message carrying the GUTI information sent by the interworking function entity IWF, where the GUTI information includes the MME ID; the HOSF parses the GUTI information to obtain the MME address information. .
- the query configuration information finds the information of the MME associated with the MME information.
- the IWF addresses the H0SF according to the MME address information provided by the UE, and the MME information is brought to the H0SF, and the HOSF interacts with the MME according to the H0SF information, thereby indirectly achieving the effect of the IWF interacting with the MME.
- Step 2103b The IWF saves the address information of the MME (for example, GUTI), and ensures that the subsequent IWF can address the MME and interact with the MME.
- the method for addressing the MME by the IWF may be: performing DNS resolution according to the MME address information (for example, the GUTI includes the MME ID - the identifier of the MME), and obtaining address information (for example, IP address information) of the MME.
- the query configuration information finds the information of the MME associated with the MME information.
- Step 2102 of this embodiment provides a method for an IWF to obtain an MME address.
- An embodiment of the method for addressing the MME may be: the interworking function entity IWF receives the message carrying the GUTI information sent by the user equipment UE, where the GUTI information includes an MME ID; and the IWF parses the GUTI information to obtain The MME address information is sent to the corresponding MME according to the MME address information, where the service processing message may be a handover Information, get the location information of the UE, and so on.
- the method can also be applied to other scenarios.
- the IWF also needs to be addressed to the MME, and further interacts with the MME.
- the other scenario may be:
- the MSC sends a location request message to the IWF, and the IWF needs to address the MME, and sends a message for acquiring the location information of the UE from the MME, and returns the received location information of the UE to the MS (:.
- the process is as follows:
- the IWF can obtain the MME IP address information by performing DNS resolution on the MME ID provided by the UE, which may be: constructing a domain name by using the MME ID, querying the DNS server for the address corresponding to the MME ID, and the DNS server to the IWF. Returning the IP address of the MME corresponding to the MME ID.
- the step of the embodiment further provides a method for the PDCCH to obtain the MME address, which may be: the H0SF receives the message carrying the GUTI information sent by the interworking function entity IWF, where the GUTI information includes the MME ID; the HOSF parses the GUTI The information obtains the MME address information, and sends a service processing message to the corresponding MME according to the MME address information.
- the message carrying the GUTI information sent by the H0SF to the interworking function entity is specifically the message sent by the IWF to the H0SF registration process.
- the specific parsing process may refer to the parsing process of the IWF.
- the method can be employed in step 2103a of the above embodiment.
- the implementation process of implementing the UE handover method may include: Step 2201:
- the source-end evolved base station (eNodeB) receives the measurement report reported by the UE, and triggers the UE to learn from the long-term evolution plan ( LTE, Long Term Evolution)
- the network switches to the Global System of Mobile Communication (GERAN: GSM EDGE Radio Access Network) / UMTS Terrestrial Radio Access Network (UTRAN: UMTS Territorial Radio) Access Network) Network.
- GERAN Global System of Mobile Communication
- UTRAN UMTS Terrestrial Radio Access Network
- Step 2202 The source eNodeB sends a handover request message to the MME.
- the cell carried in the handover request message indicates that the source MME needs to switch the LTE network service, such as voice service, to the CS domain of the GERAN/UTRAN network.
- LTE network service such as voice service
- Step 2203 The MME sends a handover request message to the HOSF.
- the method for the MME to address the H0SF may be to perform DNS resolution (which may be parsed according to the Target ID information provided by the MME) to obtain address information (for example, IP address information) of the H0SF. If the parsing obtains a plurality of H0SF address information, the MME may send a handover request message to the plurality of HOSFs.
- the H0SF address information obtained by the MME is the H0SF of the IWF registration involved in the scheme described in FIG. 21, or the plurality of HOSF address information obtained by the MME includes one or more H0SF address information of the IWF registration involved in the scheme described in FIG. .
- the specific can be achieved by configuring a DNS server.
- the method for the MME to address the HOSF may be that there is a logical correspondence between the MME and the HOSF, and the MME has an association relationship with one or more HOSFs. According to the association relationship, the MME sends a handover request message to The one or more H0SFs.
- Step 2204 The HOSF sends a handover request message to the IWF.
- the H0SF is the serving IWF in the EPS network.
- Step 2205 The IWF receives the handover request message, and converts the handover request message into a CS domain handover request message, and sends the handover request message to the mobile switching center (MSC: Mobile Switch Center).
- MSC Mobile Switch Center
- the MSC is a serving MSC in the EPS network.
- Step 2206 resource allocation is performed between the MSC and the target base station subsystem (BSS: Base Station Subsystem).
- BSS Base Station Subsystem
- Step 2207 the MSC notifies the IWF that the resource allocation is completed.
- Step 2208 the IWF notifies the H0SF resource allocation to be completed.
- Step 2209 The IWF notifies the MME that the target side resource establishment is completed.
- Step 2210 The MME notifies the source eNodeB that the handover preparation is completed.
- Step 2211 The source eNodeB notifies the UE to switch to the target network.
- Step 2212 The UE accesses the GERAN network, and completes handover from the LTE network to the GERAN/UTRAN network CS domain.
- the method for implementing UE handover provided by the embodiment of the present invention obtains the address information of the IWF registered by the UE by using the functional entity in the network architecture, such as the scheme described in FIG. 21, and the H0SF obtains the information according to the method.
- the address information is sent to the IWF to perform the handover process, thereby ensuring the normal operation of the user equipment handover process in the CSoPS scenario.
- the embodiment of the present invention further provides a system, including: a handover selection entity H0SF221, an interaction function entity IWF222, and a user equipment UE223, wherein the handover selection entity further includes an acquisition unit 2311, a reception unit 2312, and a handover notification unit 2313,
- the interaction function entity further includes an MME address obtaining unit 2321, a H0SF address obtaining unit 2322, and a sending unit 2323.
- the MME address obtaining unit 2321 of the IWF 232 is configured to interact with the UE 233 to obtain the MME address information of the mobile management entity registered by the UE.
- the H0SF address obtaining unit 2322 of the IWF 232 is configured to obtain address information of the HOSF according to the MME address information.
- the transmitting unit 2323 of the IWF 232 is configured to provide the address of the IWF 232 itself to the H0SF 231 corresponding to the address information of the HOSF.
- the acquiring unit 2311 of the H0SF 231 is configured to acquire address information of the interactive function entity IWF232.
- the receiving unit 2312 of the H0SF 231 is configured to receive a notification message that the user equipment UE performs handover.
- the switching notification unit 2313 of the H0SF 231 is configured to notify the according to the acquired IWF address information.
- the IWF 232 performs switching processing.
- An embodiment of the present invention further provides a handover selection entity, including:
- a receiving unit configured to send, by the user equipment UE, a message that carries the GUTI information, where the GUTI information includes an MME ID
- a parsing unit configured to parse the GUTI information to obtain an MME.
- the parsing unit further includes: the query unit is configured to query the DNS server for the address corresponding to the MME ID, and the receiving unit is configured to: the DNS server returns, to the H0SF, the IP address information of the MME corresponding to the MME ID.
- An embodiment of the present invention further provides an interactive function entity, including:
- a receiving unit configured to send, by the IWF, a message that carries the GUTI information, where the GUTI information includes an MME ID
- a parsing unit configured to parse the GUTI information to obtain an MME.
- the parsing unit further includes: the query unit is configured to query the DNS server for the address corresponding to the MME ID, and the receiving unit is configured to: the DNS server returns, to the H0SF, the IP address information of the MME corresponding to the MME ID.
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Description
实现用户设备切换的方法、 装置及系统 本申请要求于 2008年 12月 22日提交中国专利局、 申请号为 200810240704. 0、 发 明名称为 "实现用户设备切换的方法、 装置及系统"的中国专利申请以及 2009年 3月 16 日提交中国专利局、 申请号为 200910129618. 7、 发明名称为 "实现用户设备切换的 方法、 装置及系统"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 本发明涉及通信技术领域, 尤其涉及实现用户设备切换的方法、 装置及系统。 背景技术 演进的分组网络(EPS : Evolved Packet System)是第三代伙伴计划(3GPP: The 3rd
Generat ion Partnership Project )在长期演进计划 ( LTE, Long Term Evolut ion) 的 指导下定义了新的移动通信网络的架构, 该架构比现有的通用无线分组业务 (GPRS: General Packer Radio Service ) 网络 /通用移动通信系统 ( UMTS : Universal Mobi le Telecommunicat ions System ) 网络更加扁平, 并且只保留了分组域 ( PS: Packet Switched) 。
但是, 由于运营商的很多业务都运行在电路交换(CS : Circuit Switched)域中, 因此, 为了在 LTE网络中能够使用现有的 CS域业务, 提出了通过 EPS连接到 CS域的方法。
如附图 1所示, 该方法是由 EPS网络中的分组数据网络网关 (PDN-GW: Packet Data Network Gateway )通过交互功能 ( IWF: Interworking Funct ion ) 实体连接到传统 CS 域的移动交换中心 (MSC: Mob i le Switch Center )上, 由于 IWF具备模拟 Iu-CS/A接口 的能力, 例如, IWF配置 Iu-CS/A接口对应的协议栈。 若 UE需要与 MSC进行通信, 则首先 UE发送消息给 IWF, IWF可以将收到的消息转换成 IU-CS/A接口上的信令格式, 并发送给 MSC, 从而完成 UE与 MSC的通信。 同理, IWF可以将从 MSC接收的消息转发给 UE。 LTE网络 在这种通信模式下是作为 UE与 IWF之间的交互通道。
在上述网络架构下, 用户设备(UE: User Equipment )通过逻辑概念接口 Zl (可以 理解为一个参考点或一条 IP通道) , 与 IWF进行信令和数据交互。 实际上, UE和 IWF之间 的信令或者数据交互是通过 EPS网络的用户面隧道承载的, 那么它们真实传递是在 UE、 演进的基站(eNodeB )、服务网关(S-GW: Serving Gateway ) /分组数据网络网关(PDN-GW:
Packet Data Network Gateway) , 以及 IWF之间进行。
这表明,在现有网络架构下, UE和 IWF之间的信令或者数据交互是不经过架构中的 移动管理实体 (MME: Mobility Management Entity) 的, 即现有网络架构中, UE与 IWF 之间的交互对于 MME都是透明的。
这有可能导致,当发生 LTE网络到全球移动通讯系统(GSM: Global System of Mobile Communication )的边缘无线接入系统(GERAN: GSM EDGE Radio Access Network) /UMTS 陆地无线接入网络 (UTRAN: UMTS Territorial Radio Access Network)切换的时候, 无法进行切换。 发明内容 本发明实施例要解决的主要技术问题是提供一种实现用户设备切换的方法、 装置 及系统, 从而保证了在 CSoEPS场景下, 用户设备切换流程的正常进行。
本发明实施例提供了一种实现用户设备切换方法, 包括:
移动管理实体通过与网络中的功能实体进行交互,获取用户设备注册的交互功能实 体的地址信息;
移动管理实体根据获取的所述交互功能实体地址信息,通知所述交互功能实体进行 切换处理。
本发明实施例还提供了一种实现用户设备切换的系统, 所述系统包括:
移动管理实体, 用于通过与网络中的功能实体进行交互, 获取用户设备注册的交互 功能实体的地址信息, 并根据获取的所述交互功能实体地址信息, 通知所述交互功能实 体进行切换处理;
交互功能实体,用于在将所述移动管理实体发送的切换通知转换为电路交换域切换 信息后, 将所述电路交换域切换信息发送至移动交换中心, 并接收所述移动交换中心发 送的资源分配完成通知, 转发至所述移动管理实体。
本发明实施例还提供了一种移动管理实体, 包括:
地址信息获取模块, 用于通过与网络中的功能实体交互, 获取用户设备注册的交互 功能实体地址信息;
切换通知模块, 用于根据所述地址信息获取模块获取的所述交互功能实体地址信 息, 通知所述交互功能实体进行切换处理。
本发明实施例还提供了一种用户设备, 包括:
地址信息获取模块, 用于获取用户设备注册的交互功能实体地址信息; 地址信息上报模块, 用于通过与移动管理实体交互, 将所述地址信息获取模块获取 的所述交互功能实体的地址信息, 上报至所述移动管理实体。
本发明实施例还提供了一种交互功能实体, 包括:
地址信息上报模块, 用于通过与移动管理实体交互, 将自身地址信息, 上报至所述 移动管理实体;
切换处理模块, 用于根据所述移动管理实体发送的切换通知, 进行切换处理。 本发明实施例还提供了一种用户服务器, 包括:
地址信息获取模块, 用于获取用户设备注册的交互功能实体地址信息; 地址信息上报模块, 用于通过与移动管理实体交互, 将所述地址信息获取模块获取 的所述交互功能实体的地址信息, 上报至所述移动管理实体。
由上述本发明实施例提供的技术方案可以看出, 本发明实施例中, 移动管理实体 通过与网络架构中的功能实体进行交互, 获取用户设备注册的交互功能实体的地址信 息, 并根据获取的交互功能实体地址信息, 通知所述交互功能实体进行切换处理, 从而 确保了移动管理实体能够获取用户设备注册的交互功能实体的地址信息, 保证了在
CSoEPS场景下, 用户设备切换流程的正常进行。 附图说明 图 1为现有技术中网络架构示意图;
图 2为本发明实施例提供的实现 UE切换方法的流程示意图;
图 3为本发明实施例提供的所述方法中 MME获取 IWF地址信息过程示意图一; 图 4为本发明实施例提供的所述方法中 MME获取 IWF地址信息过程示意图二; 图 5为本发明实施例提供的所述方法中 MME获取 IWF地址信息过程示意图三; 图 6为本发明实施例提供的所述方法中 MME获取 IWF地址信息过程示意图四; 图 7为本发明实施例提供的所述方法中 MME获取 IWF地址信息过程示意图五; 图 8为本发明实施例提供的所述方法中 MME获取 IWF地址信息过程示意图六; 图 9为本发明实施例提供的所述方法中 MME获取 IWF地址信息过程示意图七; 图 10为本发明实施例提供的所述方法中 MME获取 IWF地址信息过程示意图八; 图 11为本发明实施例提供的所述方法中 MME获取 IWF地址信息过程示意图九; 图 12为本发明实施例提供的所述方法中 MME获取 IWF地址信息过程示意图十;
图 13为本发明实施例提供的所述方法中 MME获取 IWF地址信息过程示意图十一; 图 14为本发明实施例提供的所述方法中 MME获取 IWF地址信息过程示意图十二; 图 15为本发明实施例提供的所述方法中 MME获取 IWF地址信息过程示意图十三; 图 16为本发明实施例提供的实现 UE切换系统结构示意图;
图 17为本发明实施例提供的移动管理实体结构示意图;
图 18为本发明实施例提供的用户设备结构示意图;
图 19为本发明实施例提供的交互功能实体结构示意图;
图 20为本发明实施例提供的用户服务器结构示意图。
图 21为本发明实施例提供的方法过程示意图。
图 22为本发明实施例提供的实现 UE切换方法的过程示意图。
图 23为本发明实施例提供的系统结构示意图。 具体实施方式 本发明实施例提供了一种实现用户设备(UE: User Equipment )切换的方法, 地址 的方法, 通过由网络架构中的功能实体与移动管理实体 (MME: Mobility Management Entity)交互, 从而使 MME获取 UE注册的交互功能实体(IWF: Interworking Function) 的地址信息; MME根据获取的地址信息, 通知 IWF进行切换处理, 从而避免了现有技术中 可能出现的 UE无法切换问题, 确保了网络的稳定。
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, 对本发明实施例 提供的实现 UE切换的方法在不同场景的具体实现过程, 作进一步地详细描述。
如附图 2所示, 本发明实施例提供的实现 UE切换方法的实现过程具体可以包括: 步骤 201, 源端演进的基站 (eNodeB)接收 UE上报的测量报告, 触发该 UE从长期演 进计划(LTE, Long Term Evolution)网络切换到全球移动通讯系统(GSM: Global System of Mobile Communication ) 的边缘无线接入系统 (GERAN: GSM EDGE Radio Access Network) /UMTS陆地无线接入网络 (UTRAN: UMTS Territorial Radio Access Network) 网络。
需要说明的是, 对于除 MME获取 UE注册 IWF地址信息之外的, 有关于切换所需的技术 处理手段, 本发明实施例并不限制, 可根据实际需要, 采用任一种技术手段得以实现。
步骤 202, 源端 eNodeB发送切换请求消息给 MME。
切换请求消息中携带的信元指示源端 MME需要将 LTE网络业务, 例如语音业务, 切换
到 GERAN/UTRAN网络的 CS域。
步骤 203, MME通过与 UE交互, 获取当前网络中, 服务 IWF (即 UE注册的 IWF) 的地址 信息。
本发明实施例提供的实现 UE切换方法的一个具体实施例中, 可如附图 3所示, 由 UE 将其注册的 IWF地址信息, 通过非接入层 (NAS: Non Access Stratum) 消息上报给 MME, 从而使 MME获取 UE注册的 IWF的地址信息。
需要说明的是, 本发明实施例涉及的 IWF地址信息, 可以是 IWF的 IP地址信息, 也可 以是 IWF的标识 (例如: " IWF ID"或者 " IWF Number"等等) , MME或者相关网元可以 通过 IWF地址信息寻址到 IWF。
UE向 MME上报 IWF地址信息的触发点具体可以有以下方式:
1 ) UE可以由电路域 (CS : Circuit Switched) 业务触发, 向 MME上报 IWF的地址信 息。
由于 UE只有在处于连接态, 才可以与 IWF之间进行交互, 而空闲态 UE要进行 CS业务 时, 需要先执行服务请求流程, 即将 UE状态从空闲态转移到连接态。 那么, 本发明实施 例提供的实现 UE切换方法可以在 UE执行服务请求流程时所涉及的服务请求 (Service Request ) 消息 (NAS消息中的一种) 中, 携带 IWF的地址信息, 并上报给匪 E。
可以理解的是, 如果 UE处于连接态, 则本发明实施例还可以采用其他 NAS消息将 UE 注册的 IWF地址信息上报给匪 E。 也可以新增一条 NAS消息, 用于上报该 IWF地址信息, 本 发明实施例对此并不限制。
2) UE也可以在 IWF注册完成以后, 主动向 MME上报 IWF的地址信息。
具体的, 当 UE在 IWF注册完成后, UE可以在服务请求消息, 或者其它 NAS消息中携带 IWF的地址信息, 上报给 MME。
本发明实施例中,可以携带 IWF地址信息的 NAS消息具体可以包括:附着请求(Attach Request ) , 跟踪区更新请求 (TAU Request ) , 服务请求 (Service Request ) , 分离 请求 ( Detach Request ) , UE要求的承载资源分配 ( Request Bearer Resource Allocation) , UE要求的承载资源释放 (Request Bearer Resource Release ) , 分组 数据网络 (PDN: Packet Data Network) 连接请求 (PDN Connectivity Request ) , PDN 去连接请求 (PDN Disconnection Request ) 等等。
可以理解的是, UE也可以通过新增的 NAS消息, 将 IWF地址信息上报给匪 E。 本发明 实施例对此并不限制。
步骤 204, MME根据获取的 IWF地址信息, 向 IWF发送切换请求消息。
该 IWF为 EPS网络中的服务 IWF。
步骤 205, IWF接收切换请求消息, 并将切换请求消息转换成 CS域的切换请求消息, 发送至移动交换中心 (MSC: Mobile Switch Center) 。
该 MSC为 EPS网络中的服务 MSC。
步骤 206, MSC与目标基站子系统 (BSS: Base Station Subsystem) 之间进行资源 分配。
步骤 207, MSC通知 IWF资源分配完成。
步骤 208, IWF通知 MME目标侧资源建立完成。
步骤 209, MME通知源端 eNodeB, 切换准备完成。
步骤 210, 源端 eNodeB通知 UE切换到目标网络。
步骤 211, UE接入 GERAN网络, 完成从 LTE网络到 GERAN/UTRAN网络 CS域的切换。 通过上述描绘可以看出, 本发明实施例提供的实现 UE切换的方法, 通过由网络架构 中的功能实体, 比如 UE与 MME交互, 从而使 MME获取 UE注册的 IWF的地址信息, MME根据获 取的地址信息, 通知 IWF进行切换处理, 从而保证了在 CSoEPS场景下, 用户设备切换流 程的正常进行。 本发明实施例提供的实现 UE切换方法的一个具体实施例中, 当 UE注册的 IWF变更时, MME需要更新 UE注册的 IWF地址信息,那么, UE可以在 IWF变更时,主动通过发起 NAS消息, 将变更后的 IWF地址信息通知 MME。 该过程具体可如附图 4所示, 包括:
步骤 401, UE向源侧 IWF (即变更前 UE注册的 IWF) 发送更新请求。
步骤 402, 源侧 IWF由于无法继续为 UE提供服务, 因此向 UE发送注册重置请求, 并向 UE提供目标侧 IWF (即变更后 UE注册的 IWF) 的相关信息 (包括地址信息) 。
步骤 403, UE可以选择目标侧 IWF作为服务 IWF, 并向目标侧 IWF发送注册请求。 步骤 404, UE主动发起 NAS消息通知匪 E。
UE可以采用现有的 NAS消息,或者新增的 NAS消息,向 MME上报目标侧 IWF的地址信息。 从而使 MME获取变更后, 为 UE提供服务的 IWF地址信息。 本发明实施例提供的实现 UE切换方法的另一个具体实施例中, 可由 IWF通过与 UE 或归属用户服务器 (HSS: Home Subscriber Server) 交互, 获取 MME的地址信息, 并
由 IWF根据获取的地址信息, 向该 MME进行注册, 从而使 MME获取 UE注册的 IWF的地 址信息。
本发明实施例中较佳适用的 MME地址信息的具体表现形式可为全球唯一临时标识 (GUTI: Globally Unique Temporary Identity) 或 MME标识 (ID)。 GUTI是 MME分配 给用户的临时标识, 其中包含了匪 E ID的信息, 可以用于寻址 MME。 gp, 本发明实施例 具体可由 IWF通过解析 GUTI, 获取 MME ID, 并通过 MME ID找到 MME, 后续可由 IWF将 其地址信息注册到 MME中。 本发明实施例不排除采用其它 MME地址信息的表现形式。 例 如: 采用 MME的 IP地址信息。
若具体由 IWF通过与 UE进行交互, 则本发明实施例具体可如附图 5所示, 包括: 步骤 501, UE在与 IWF交互过程中, 将 MME的地址信息提供给 IWF。
UE向 IWF提供 MME地址信息的交互场景具体可以包括以下任意一种情况或者全部:
1 )在 UE向 IWF注册的过程中 (包括初次注册过程, 或者服务的 IWF改变, 重新注 册到新的 IWF的过程) 。
具体的表现形式可以是: 在 UE向 IWF发起注册流程的 "UE-IWF发现请求 (UE-IWF DISCOVERY REQUEST) ,,或者 "UE-IWF注册请求 (UE-IWF REGISTER REQUEST) ,,消息中 携带 GUTI或 MME ID信息。
需要说明的是,本发明实施例不排斥在其它与 IWF交互过程中所涉及的相关消息中, 也携带 GUTI或 MME ID信息。例如 "UE-IWF注册更新上行消息(UE-IWF REGISTER UPDATE UPLINK) "消息中携带 GUTI或 MME ID信息; 另外在已经定义的周期更新过程中, UE 发送给 IWF的 "UE-IWF保持激活消息 (UE-IWF KEEP ALIVE) ,, 消息中携带 GUTI或 MME ID信息。
2) 由 CS域的业务触发。 例如, 在每次呼叫流程中提供。
具体的表现形式可以是: 在 UE-IWF连接(UE-IWF connection)建立过程, UE发送 给 IWF的 "UE-IWF请求 (UE-IWF REQUEST) ,, 消息中携带 GUTI或 MME ID信息; 另外 在已经定义的 UE发起的 CS信令连接过程中, UE发送给 IWF的 "UE-IWF上行直传消息 (UE-IWF UL DIRECT TRANSFER) " 中携带 GUTI或 MME ID信息。
3)在 UE已经注册到服务的 IWF的情况下,如果 UE接收到 MME分配的 GUTI或 MME ID 信息 (例如 MME改变的情况下) , 则 UE在发送给 IWF的消息, 例如 " UE-IWF注册更新 上行消息 (UE-IWF REGISTER UPDATE UPLINK) ,,中, 携带更新的 GUTI或 MME ID信息。
需要说明的是, 如果 IWF保存 MME的地址信息, 当 IWF发现保存 MME的地址信息发
生改变的时候, 所述 IWF寻址新地址指向的 MME, 并向所述 MME发起注册流程。
需要说明的是, 上述 3种方式中, 采用的都是 UE通过与 IWF之间的进行信令交互, 从而将 MME地址信息传递给 IWF。而本发明实施例中,不排除 UE不采用信令交互的方式, 而是将 MME地址信息放置在一个数据包中, 将 IWF作为目的地, 把携带 MME地址信息的 数据包传递给 IWF。 IWF解析数据包可以得到 MME的地址信息。
UE向 IWF发送数据包的触发条件具体可以如上述 1 ) 、 2) 、 3) 。
步骤 502, IWF获得当前服务 UE的 MME地址信息,向该 MME发送注册信息(包括 IWF 地址信息) , 将自己注册到 MME中, 从而使 MME获得 IWF的地址信息。
若具体由 IWF通过与 HSS进行交互, 则本发明实施例具体可如附图 6所示, 包括: 步骤 601, IWF向 HSS请求 UE注册的 MME地址信息。
需要说明的是, 在现有网络架构下, IWF与 HSS之间是没有可进行交互的接口的, 为了实现 IWF与 HSS之间可进行信令交互, 因此, 本发明实施例中, 在 IWF与 HSS之间 新增设了接口, 从而使 IWF与 HSS之间可以进行信令交互。
对于增设接口的处理手段, 本发明实施例并不限制。
对于 IWF向 HSS请求 UE注册的 MME地址信息的触发点,可以是 UE完成到 IWF注册 过程 (包括服务的 IWF改变的情况), 或者由 CS域的业务触发等等方式。
具体可由 IWF向 HSS发送 "MME地址请求消息"(MME Request ), 向 HSS请求 UE注 册的 MME地址信息。
步骤 602, HSS向 IWF返回 UE注册的 MME地址信息。
具体可由 HSS通过发送 "MME地址请求响应消息" (MME Response ) , 向 IWF返回 UE 注册的地址信息。
步骤 603, IWF根据从 HSS中处获得的当前 UE注册的 MME地址信息, 向该 MME发送注册 信息 (包括 IWF地址信息) , 将自己注册到 MME中, 从而使 MME获得 IWF的地址信息。
如若需要, MME执行步骤 604, 向 IWF回复注册响应。 本发明实施例提供的实现 UE切换方法的另一个具体实施例中, 可由 MSC在向 HSS 注册的过程中,将 IWF地址信息注册到 HSS中,或者由 IWF自身向 HSS发起注册的流程, 将 IWF地址信息注册到 HSS中。后续由 HSS将 IWF地址信息作为签约数据再发送给 MME, 从而使 MME获取 UE注册的 IWF地址信息。
若由 MSC在向 HSS注册的过程中, 将 IWF地址信息注册到 HSS, 则本发明实施例可如附
图 7所示, 具体可以包括:
步骤 701, UE通过 IWF, 向 MSC发送位置更新请求(LAU Request ) 消息。
步骤 702, MSC向 HSS发送更新位置消息, 消息中携带 UE注册的 IWF的地址信息 (IWF
ID) 。
此步骤中可能涉及两种场景, 一种是当 MSC发现 UE注册的 IWF改变的时候, MSC需要 触发向 HSS发送更新位置消息, 另一种是当 UE初次注册到该 MSC时, MSC需要触发向 HSS发 送更新位置消息。
步骤 703, HSS向 MSC回复更新位置确认消息。
步骤 704, MSC向 UE回复更新位置确认消息。
步骤 705, 当 HSS发现 IWF信息更新时, 包括 UE注册的 IWF变更或者 UE初次注册到 MSC,
HSS向已经注册的网元, 如 MME, 插入签约数据, 签约数据中携带 UE当前注册的 IWF地址 信息。
步骤 706, MME向 HSS回复插入签约数据确认消息。
需要说明的是,在现有网络架构中, 由于 IWF是模拟 Iu-CS/A接口的功能,那么对 MSC 来说, 它可能会认为 IWF是无线网络子系统(RNS: Radio Network Subsystem) /基站子 系统 (BSS: Base Station Subsystem) 。 为了完成 IWF到 HSS的注册, 此时 IWF在模拟的 Iu-CS/A接口的功能的同时, 需要向 MSC提供信息指示此时连接的是 IWF而不是 RNS/BSS, 即此时模拟 Iu-CS/A接口消息中需要携带信息指示此时关联的实体是 IWF。对于具体指示 信息的形式, 本发明不做限定。 例如: IWF在与 MSC通信的时候, 将自己的地址信息告诉 给 MS (:。 MSC收到带有地址信息的消息后, 认为与它关联的是一个 IWF, 后续将 IWF地址注 册到 HSS。 BP, MSC需要感知 IWF。
另外, IWF的地址信息有可能直接作为 UE的签约数据的一部分(例如:用户在签约 的时候就已经签署了在网络中使用的 IWF信息。这种方式可以看作是静态的 IWF签约信 息。 而上述如附图 7所示的方案可以看作是动态的 IWF签约信息) 。 在 MME向 HSS注册 的过程中, HSS将 IWF的地址信息作为 UE的签约数据的一部分发送给 MME。 当 UE服务 的 MME改变的时候, 新的 MME会向 HSS发起注册, 这个时候 HSS将 IWF的地址信息作为 UE的签约数据的一部分发送给新注册的 MME。 或者 MME将 IWF的地址信息保存在 UE的 上下文中, 当 MME发生改变的时候, 源侧 MME将 IWF地址信息传递给目标侧 MME。
若由 IWF自身向 HSS发起注册的流程, 将 IWF地址信息注册到 HSS中, 则本发明实 施例可如附图 8所示, 包括:
步骤 801, UE向 IWF发起注册请求。
步骤 802, IWF向 HSS发送注册请求。
注册请求消息中, 包括有 IWF的标识信息 (IWF ID ) , 可以帮助 HSS寻址进行注册的
IWF。
注册请求具体可以为清除 UE消息 (Purge UE) 。
步骤 803, HSS向 IWF返回注册响应。 比如清除 UE确认消息 (Purge UE Ack) 。
此步骤中, HSS还可以删除之前保存在的, 变更前 UE注册的 IWF信息。
步骤 804, IWF向 UE返回注册响应。
步骤 805, 当 HSS发现 IWF信息更新时, HSS向已经注册的网元, 如 MME, 插入签约数 据, 签约数据中携带 UE当前注册的 IWF地址信息。
步骤 806, MME向 HSS回复插入签约数据确认信息。
需要说明的是,在本发明实施例上述具体实施方式中,均采用 HSS主动向 MME下发 IWF 地址信息的处理操作, 其实, 本发明实施例中, 也可以是 MME主动向 HSS查询 IWF地址信 息。
具体可如附图 9所示, 当 MME需要与 IWF进行交互的时候, MME向 HSS查询 UE注册的 IWF 地址信息。 具体 MME可以通过向 HSS发送 " IWF地址请求消息 (IWF Request ) ,,,从而向 HSS请求 UE注册的 IWF地址信息。 后续 HSS可通过发送 " IWF地址请求响应消息 ( IWF Response ) ,, , 向 MME返回 UE注册的 IWF地址信息。 本发明实施例提供的实现 UE切换方法的另一个具体实施例中, 可由 IWF将其地址信 息通过策略和计费规则功能 (PCRF: Pol icy Charging Rules Funct ion) 实体下发给分 组数据网络网关 (PDN-GW: Packet Data Network Gateway ) , PDN-GW (即 P-GW) 发起 承载激活流程, 在请求消息中将 IWF地址带给 MME, 从而使 MME获取 UE注册的 IWF的地址信 息。
如附图 10所示, 本发明实施例具体可以包括:
步骤 1001, IWF触发 PCRF发起会话修改 (IP-CAN) 流程。
在此交互过程中, IWF向 PCRF提供 IWF地址信息。
步骤 1002, PCRF向 PDN GW提供策略和计费控制 (PCC: Pol icy Charging Control ) 策略, 并将 IWF地址信息传递给 PDN GW。
上述传递方式即可以将 IWF地址信息包含在策略和计费控制(PCC: Pol icy Charging
Control )策略里, 也可以将 IWF地址信息作为信元携带在消息中单独传递。
步骤 1003, PDN GW发送创建承载请求消息给服务网关(S-GW: Serving Gateway) , 消息中携带 IWF地址信息。
步骤 1004, S-GW发送创建承载请求消息给 MME, 消息中携带 IWF地址信息。
需要说明的是, 本发明实施例给出的 PDN GW通过创建承载请求消息携带 IWF地址信 息传递给 MME, 不排除通过其它消息携带 IWF地址信息传递给 MME, 例如, 更新承载请求 消息 (Update Bearer Request ) , 删除承载请求消息 (Delete Bearer Request ) 。 本发明实施例提供的实现 UE切换方法的另一个具体实施例中, UE发起附着流程或 者跟踪区更新流程, 由 PDN GW提供 IWF地址信息, 并通过 MME将 IWF地址信息发送至 UE, 从而使 MME获取 UE注册的 IWF的地址信息。
如附图 11所示, 本发明实施例的过程具体可以包括:
步骤 1101, UE向 MME发送附着请求或者跟踪区更新请求(TAU Request ) , 消息中 携带 UE是否支持 "电路交换域连接演进的分组网络" (CSoEPS) 的能力信息; 或者携 带一个指示信息, 比如 "电路交换域连接演进的分组网络指示" (CSoEPS indication) 或者 " IWF地址信息,, ( IWF Addres s )信元, 指示网络侧将 IWF地址传递给 UE; 对于支持 CSoEPS的 EPS网络,可能需要在小区广播消息中广播其支持 CSoEPS的能 力信息, 对于支持 CSoEPS的终端, 在网络也支持 CSoEPS的情况下, 才会向网络侧上报 是否支持 CSoEPS的能力信息或者请求 IWF地址。
步骤 1102, MME获得 UE的是否支持 CSoEPS的能力信息, 或者根据 UE上报的指示 信息 "CSoEPS indication"或者 " IWF Address "信元, 发送缺省承载建立请求消息 (对应于附着流程), 或者承载创建 /更新请求消息(对应于跟踪区更新流程)给 S-GW。 消息中携带指示信息, 例如 "CSoEPS indication"或者 " IWF Address "信元, 指示 P-GW提供 IWF地址。
步骤 1103, S-GW转发缺省承载建立请求消息(对应于附着流程)或者承载创建 /更 新请求消息 (对应于跟踪区更新流程)给 PDN GW。
步骤 1104, PDN GW根据接收的消息中包含的 "CSoEPS indication"或者 " IWF Address "信元, 向 MME提供 IWF地址信息。
具体地, PDN GW向 S-GW发送创建缺省承载响应消息, 该响应消息中, 包括有 IWF 地址信息。
PDN GW获取 UE服务 IWF地址信息的方法可以是运营商配置。 例如, 运营商配置可 用的 IWF地址列表, PDN GW根据响应的负载情况从所述列表中选择合适 IWF。
步骤 1105, S-GW转发响应消息给 MME, 消息中携带 IWF地址。
步骤 1106, MME向 UE发送附着接收消息或者跟踪区更新接收消息,消息中携带 IWF 地址信息给 UE。 本发明实施例提供的实现 UE切换方法的另一个具体实施例中, 已经获取的 UE注册 的 IWF地址信息的 MME, 将 IWF的地址信息保存在 UE的上下文中; 当 MME发生变更时, 源侧 MME将 IWF地址信息传递给目标侧 MME。 从而使当前服务 UE的 MME获得 UE注册的 IWF地址信息。
如附图 12所示, 本发明实施例具体可以包括:
步骤 1201, 当已经获得 UE注册的 IWF地址信息的 MME发生变更时, 源侧 MME将 IWF地址 信息传递给目标侧匪 E。
此时, IWF地址信息可以携带在消息上下文请求, 或者重置请求消息中。 其表现形 式可以是消息中的单独信元 " IWF Address " , 也可以作为 UE的上下文信息, 保存在 UE 的上下文中, 在消息中从源侧 MME (变更前匪 E) 传递至目标侧 MME (变更后匪 E) 。
步骤 1202, 目标侧 MME向源侧 MME回复响应消息。
步骤 1203, 源侧 MME向目标侧 MME回复确认消息。 本发明实施例提供的实现 UE切换方法的另一个具体实施例中, MME发起向 UE注册 的 IWF进行注册的流程(包括 UE初次注册的 MME以及变更后的 MME),那么, UE注册 IWF 就可以获得 UE注册的 MME地址信息,从而可以实现后续 IWF可以主动与 MME进行交互。
本发明实施例 MME获得 UE服务的 IWF地址信息的式, 可以是上述任何一个实施例 描述的方式。
如附图 13所示, 对于 UE初次注册的 MME, 本发明实施例的实现具体可以包括: 步骤 1301, MME向 UE注册 IWF, 发送注册消息。
消息中携带 UE注册的 MME地址信息。 该地址信息可以是 MME的 IP地址信息, 也可 以是 MME标识, 还可以是 MME的临时标识 GUTI等可以表征 MME地址的信息。
对于具体的消息名称, 本发明实施例不做限定, 消息的功能是: 向 IWF提供 UE注 册的 MME的信息, 保证 IWF可用寻址匪 E。
步骤 1302, IWF向 MME返回注册响应消息。
而对于 UE注册的 MME改变的场景,更新后目标侧 MME向 UE注册 IWF进行注册的流 程可以包括以下场景:
场景 1 ): 当 MME发生改变的时候, 源侧 MME将 IWF地址传递给目标侧 MME, 目标侧 MME主动到 IWF注册, IWF更新 MME地址信息。
场景 2): 当 MME发生改变的时候, 源侧 MME将目标侧 MME地址传递给 IWF, IWF完 成到目标侧 MME注册的过程,然后目标侧 MME根据在 IWF注册时所获取的 IWF地址信息, 向所述 IWF发起注册流程。
对于上述场景 1 ) 的实现过程, 具体可如附图 14所示, 包括:
步骤 1401, MME发生变更时, 源侧 MME将已经获得的 UE注册的 IWF地址信息, 传 递给目标侧匪 E。
此时, IWF地址信息可以携带在消息上下文请求或者重置请求消息中。 其表现形式 可以是消息中的单独信元, 也可以作为 UE的上下文信息, 保存在 UE的上下文中, 在消 息中从源侧 MME1传递给目标侧 MME。
步骤 1402, 目标侧 MME向源侧 MME回复响应消息。
步骤 1403, 源侧 MME向目标侧 MME回复确认消息。
步骤 1404, 目标侧 MME完成到 IWF注册。
步骤 1405, IWF向目标侧 MME发送注册响应。
对于上述场景 2) 的实现过程, 具体可如附图 15所示, 包括:
步骤 1501, 当 MME发生变更时, 源侧 MME通过发送消息, 如重置请求消息, 将目标 侧 MME的地址信息传递给 IWF。
步骤 1502, IWF向源侧 MME回复响应消息。
步骤 1503, IWF通过向目标侧 MME发送注册消息, 完成在目标侧 MME中的注册。 消息 中携带 IWF地址信息。
步骤 1504, 目标侧 MME根据获取的 IWF地址信息, IWF进行注册。 通过上述描述可以看出, 本发明实施例提供的实现 UE切换方法, 通过由网络架构中 的功能实体与 MME交互, 从而使 MME获取 UE注册的 IWF的地址信息; MME根据获取的地址信 息, 通知 IWF进行切换处理, 从而保证了在 CSoEPS场景下, 用户设备切换流程的正常进 行。 而且, 本发明实施例中, 在 IWF与 HSS之间设置了接口, 从而使交互功能实体可以通
过增设的接口, 实现与归属用户服务器之间的信令交互。 另外, 本发明实施例中, IWF 还可以获知 MME的地址信息, 方便了 IWF后续可以根据需要, 主动发起与 MME的信令交互。 本发明实施例还提供了一种实现用户设备切换的系统, 该系统具体可如附图 16所 示, 包括: 用户设备 1601 (UE: User Equipment ) , 演进的基站 1602 ( eNodeB) , 移动 管理实体 1603 ( MME : Mobility Management Entity ) , 交互功能实体 1604 ( IWF : Interworking Function) , 移动交换中心 1605 (MSC: Mobile Switch Center) 以及目 标基站子系统 1606 (BSS: Base Station Subsystem) 。
该系统的具体操作可以包括:
源端演进的基站 1602 ( eNodeB)接收 UE1601上报的测量报告, 触发该 UE1601从长期 演进计划(LTE,Long Term Evolution)网络切换到全球移动通讯系统(GSM: Global System of Mobile Communication ) 的边缘无线接入系统 (GERAN: GSM EDGE Radio Access Network) /UMTS陆地无线接入网络 (UTRAN: UMTS Territorial Radio Access Network) 网络。
源端 eNodeB1602发送切换请求消息给 MME1603。
切换请求消息中携带的信元指示源端 MME需要将 LTE网络业务切换到 GERAN/UTRAN网 络的 CS域。
MME1603通过与网络中的功能实体交互, 具体可以为 UE1601等, 获取当前网络中, 服务 IWF1604 (即 UE注册的 IWF) 的地址信息。
本发明实施例所涉及的匪 E1603获取 IWF1604地址信息的具体操作过程, 具体可以参 考如附图 3至附图 15所示的本发明实施例提供的技术方案, 本发明实施例不再赘述。
MME1603根据获取的 IWF1604地址信息, 通知 IWF1604进行切换处理。 具体 MME1603可 以通过发送切换请求消息, 通知 IWF1604进行切换处理。
IWF1604接收切换请求消息, 并将切换请求消息转换成 CS域的切换请求消息, 发送 至 MSC1605。
MSC1605与 BSS1606之间进行资源分配。
MSC1605通知 IWF1604资源分配完成。
IWF1604通知匪 E1603目标侧资源建立完成。
MME1603通知源端 eNodeB1602切换准备完成。
源端 eNodeB1602通知 UE1601切换到目标网络。
UE1601接入 GERAN网络, 完成从 LTE网络到 GERAN/UTRAN网络 CS域的切换。
通过上述描述可以看出, 本发明实施例提供的实现 UE切换系统, 通过由网络架构中 的功能实体与 MME交互, 从而使 MME获取 UE注册的 IWF的地址信息; MME根据获取的地址信 息, 通知 IWF进行切换处理, 从而保证了在 CSoEPS场景下, 用户设备切换流程的正常进 行。 本发明实施例还提供了一种移动管理实体 (MME: Mobility Management Entity) , 用于通过与网络架构内的功能实体交互, 获取用户设备 (UE: User Equipment ) 注册的 互功能实体 (IWF: Interworking Function) 的地址信息, 并根据获取的 IWF地址信息, 向 IWF发送切换信息。
如附图 17所示, 本发明实施例所提供的 MME具体可以包括:
地址信息获取模块 1701,用于通过与网络架构中的功能实体交互,获取 UE注册的 IWF 地址信息。
地址信息获取模块 1701的具体操作过程, 可参考本发明实施例提供的如附图 3至附 图 15所示的技术方案, 本发明实施例不再赘述。
切换通知模块 1702, 用于根据地址信息获取模块 1701获取的交互功能实体地址信 息, 通知交互功能实体进行切换处理。
具体的切换通知可以为切换请求消息,该切换请求消息中所携带的信息可以为 UE切 换时所需的任何信息, 本发明实施例对此并不限制。
通过上述描述可以看出, 本发明实施例提供的 MME, 通过与网络架构中的功能实体 交互, 从而获取 UE注册的 IWF的地址信息, 并根据获取的地址信息, 通知 IWF进行切换处 理, 从而保证了在 CSoEPS场景下, UE切换流程的正常进行。 本发明实施例还提供了一种用户设备 (UE: User Equipment ) , 用于通过与移动管 理实体 (MME: Mobility Management Entity) 交互, 从而使 MME获取 UE注册的互功能实 体 (IWF: Interworking Function) 的地址信息。
如附图 18所示, 本发明实施例提供的 UE具体可以包括:
地址信息获取模块 1801, 用于获取 UE注册的 IWF地址信息。
地址信息上报模块 1802, 用于通过与 MME交互, 将地址信息获取模块 1801获取的 IWF 的地址信息, 上报至 MME。
本发明实施例所涉及的 UE,具体可以通过发送非接入层(NAS: Non Access Stratum) 消息, 将 UE注册的 IWF地址信息上报至 MME, 或者, 发起附着流程或者跟踪区更新流程, 由 PDN GW提供 IWF地址信息, 并通过 MME将 IWF地址信息发送至 UE, 从而使 MME获取 UE注册 的 IWF的地址信息。 具体过程可参考本发明实施例提供的如附图 3、 4、 11所示的技术方 案。
通过上述描述可以看出, 本发明实施例提供的 UE, 通过与网络架构中的 MME交互, 从而使 MME获取 UE注册的 IWF的地址信息, 从而保证了在 CSoEPS场景下, UE切换流程的正 常进行。 本发明实施例还提供了一种交互功能实体 (IWF: Interworking Function) , 用于 通过与移动管理实体 (MME: Mobility Management Entity) 交互, 从而使 MME获取用户 设备 (UE: User Equipment ) 注册的 IWF地址信息。
如附图 19示, 本发明实施例提供的 IWF具体可以包括:
地址信息上报模块 1901, 用于通过与 MME交互, 将自身地址信息, 上报至 MME; 切换处理模块 1902, 用于根据 MME发送的切换通知, 进行切换处理。
本发明实施例所涉及的 IWF, 具体可以通过与 UE或归属用户服务器 (HSS : Home Subscriber Server) 交互, 获取 MME的地址信息, 并根据获取的地址信息, 向该 MME进 行注册, 从而使 MME获取 UE注册的 IWF的地址信息, 或者, 将 IWF其地址信息通过策略和 计费规则功能 (PCRF: Policy Charging Rules Function) 实体下发给分组数据网络网 关 (PDN-GW: Packet Data Network Gateway) , PDN-GW发起承载激活流程, 在请求消 息中将 IWF地址带给 MME, 从而使 MME获取 UE注册的 IWF的地址信息。 具体可参考本发明实 施例提供的如附图 5、 6、 10所示的技术方案。
通过上述描述可以看出, 本发明实施例提供的 IWF, 通过与网络架构中的 MME交互, 从而使 MME获取 UE注册的 IWF的地址信息, 从而保证了在 CSoEPS场景下, UE切换流程的正 常进行。 本发明实施例还提供了一种用户服务器 (HSS: Home Subscriber Server) , 用于 通过与移动管理实体 (MME: Mobility Management Entity) 交互, 从而使 MME获取用户 设备 (UE: User Equipment ) 注册的 IWF地址信息。
如附图 20所示, 本发明实施例提供的 HSS具体可以包括:
地址信息获取模块 2001, 用于获取 UE注册的 IWF地址信息。
地址信息上报模块 2002, 用于通过与 MME交互, 将地址信息获取模块 2001获取的 IWF 地址信息, 上报至 MME。
本发明实施例所涉及的 HSS, 具体可以在接收移动管理中心 (MSC: Mobile Switch Center)注册的过程中, 获取 MSC发送的 IWF地址信息, 或者由 IWF自身发起注册的流 程, 获取 IWF地址信息。 后续将获取的 IWF地址信息作为签约数据发送给 MME, 从而使 匪 E获取 UE注册的 IWF地址信息。具体可参考本发明实施例提供的如附图 7、 8、 9所示 的技术方案。
通过上述描述可以看出, 本发明实施例提供的 HSS, 通过与网络架构中的 MME交互, 从而使 MME获取 UE注册的 IWF的地址信息, 从而保证了在 CSoEPS场景下, UE切换流程的正 常进行。 进一步需要说明的是, 在上述本发明实施例中所涉及的 UE与 IWF之间的通道是由 CSoEPS场景下 EPS网络提供。 但在实际应用过程中, UE与 IWF之间的通道还可由 GERAN/UTRAN等网络提供, 相应的, 需要获取的 IWF地址信息的功能器件还包括 GERAN/UTRAN网络中的服务 GPRS支持节点 (SGSN: Serving GPRS Support Node) 等功能 器件。 那么, 对于 SGSN获取 IWF地址, 就可以采用上述本发明实施例提供的获取 IWF地址 信息的方法来实现, 只不过是将功能器件 MME换成 SGSN而已, 具体实现流程不变。
这说明, 在不同网络架构下的, 对于像 SGSN这样需要获取 IWF地址信息的功能器件, 均可以采用本发明实施例提供的获取 IWF地址信息方法, 去获取 IWF地址信息。 这从一个 侧面也反映出, 本发明实施例提供的获取 IWF地址信息的方法, 具有很强的兼容性、 扩 展性和可移植性。
本发明实施例中, 提供了一种方案, UE将 MME地址信息提供给 IWF, IWF可以通过 对 UE所提供的 MME地址信息进行 DNS解析, 获得 MME IP地址信息。 所述 MME地址信息 可以为 GUTI或者 GUMMEI, 其中 GUTI或者 GUMMEI包含的 MME ID (MME标识), IWF根 据 MME ID进行 DNS解析获得 MME IP地址。 本发明另一实施例具体可如附图 21所示, 包括:
步骤 2101, UE在与 IWF交互过程中, 将 MME的地址信息提供给 IWF。
UE向 IWF提供 MME地址信息的交互场景具体可以包括以下任意一种情况或者全部:
1 )在 UE向 IWF注册的过程中 (包括初次注册过程, 或者服务的 IWF改变, 重新注 册到新的 IWF的过程) 。
具体的表现形式可以是: 在 UE向 IWF发起注册流程的 "UE-IWF发现请求 (UE-IWF DISCOVERY REQUEST) ,,或者 "UE-IWF注册请求 (UE-IWF REGISTER REQUEST) ,,消息中 携带 GUTI或 GUMMEI信息。
需要说明的是,本发明实施例不排斥在其它与 IWF交互过程中所涉及的相关消息中, 也携带 GUTI或 GUMMEI信息。例如" UE-IWF注册更新上行消息(UE-IWF REGISTER UPDATE UPLINK) "消息中携带 GUTI或 GUMMEI信息; 另外在已经定义的周期更新过程中, UE 发送给 IWF的" UE-IWF保持激活消息(UE-IWF KEEP ALIVE),, 消息中携带 GUTI或 GUMMEI 信息。
2) CS域的业务触发, 如 UE做主叫触发 CS业务, 或者 UE作为被叫收到 CS业务。 具体的表现形式可以是: 在 UE-IWF连接 (UE-IWF connection) 建立过程, UE发送给 IWF的 "UE-IWF请求 (UE-IWF REQUEST) ,, 消息中携带 GUTI或 GUMMEI信息; 另外在 已经定义的 UE发起的 CS信令连接过程中, UE发送给 IWF的 "UE-IWF上行直传消息 (UE-IWF UL DIRECT TRANSFER) " 中携带 GUTI或 GUMMEI信息。
3)在 UE已经注册到服务的 IWF的情况下,如果 UE接收到 MME分配的 GUTI或 GUMMEI 信息 (例如 MME改变的情况下) , 则 UE在发送给 IWF的消息, 例如 " UE-IWF注册更新 上行消息 (UE-IWF REGISTER UPDATE UPLINK) ,,中, 携带更新的 GUTI或 GUMMEI信息。
需要说明的是, 如果 IWF保存 MME的地址信息, 当 IWF发现保存 MME的地址信息发 生改变的时候, 所述 IWF寻址新地址指向的 MME, 并向所述 MME发起注册流程。
UE向 IWF发送数据包的触发条件具体可以如上述 1 ) 、 2) 、 3) 。
步骤 2102, IWF获得当前服务 UE的 MME地址信息, 根据所述 MME地址信息, 寻址 H0SF,将自己注册到 H0SF中,从而使 H0SF获得 IWF的地址信息。便于后续切换的时候, H0SF可以寻址服务 UE的 IWF。 具体流程如图 22所述。
根据 MME地址信息寻址 H0SF的方法可以是, 根据步骤 1中 UE提供的信息 (例如:
GUTI ) 进行 DNS解析, 获得 H0SF的地址信息 (例如, IP地址信息) 。 如果解析获得多 个 H0SF地址信息, 那么 IWF可以向所述多个 H0SF发起注册流程。 注册消息中, 可以携 带, IWF地址信息,用户标识(頂 SI和 /或 GUTI信息)。所述根据 MME地址信息寻址 H0SF 的方法与根据 MME地址信息寻址 MME的区别在于, 前者还需要 DNS服务器配置 H0SF与 MME的关联关系, DNS服务器通过 IWF提供的 GUTI信息 (其中包含 MME ID信息) 识别
对应 MME的信息, 然再通过 MME与 H0SF的关联信息, 向 IWF返回 H0SF的地址信息( IP 地址) 。 而后者是通过 GUTI信息 (其中包含 MME ID信息) 识别对应 MME的信息, 然后 向 IWF返回 MME的地址信息 (IP地址) 。
或者是根据 UE提供的 MME信息(例如: GUTI包含 MME ID-MME的标识), 查询 IWF 上预先配置的信息找到与所述 MME信息相关联的 H0SF的信息。 如果解析获得多个 H0SF 地址信息, 那么 IWF可以向所述多个 H0SF发起注册流程。 注册消息中, 可以携带, IWF 地址信息, 用户标识 (B1SI和或 GUTI信息) 。
注: H0SF是一个逻辑功能实体, 本发明不排除 H0SF与移动性管理实体 (例如, 可 以是 MME)物理合一。如果是这样的话, IWF获得当前服务 UE的 MME地址信息,寻址 H0SF 实际上就是寻址 MME, 可以参见实施例五。
步骤 2103: IWF与 MME进行交互。 其中可以包括以下两种方式:
步骤 2103a: HOSF保存 IWF提供的 MME地址信息 (例如: GUTI ) , 当后续 IWF发送信息 给 H0SF, HOSF可以将所述消息转发给匪 E。 HOSF寻址 MME的方法可以是, 根据 MME地址信 息(例如: GUTI )进行 DNS解析, 获得 MME的地址信息(例如, IP地址信息) 。 其中, IWF 向 H0SF提供 MME地址信息的具体方式可以为: H0SF接收交互功能实体 IWF发送的携带 GUTI 信息的消息, 其中所述 GUTI信息包含 MME ID; 所述 HOSF解析所述 GUTI信息获得 MME地址 信息。
或者是根据 UE提供的 MME信息 (例如: GUTI包含 MME ID— MME的标识) , 查询配 置信息找到与所述 MME信息相关联的 MME的信息。
根据 UE提供的 MME地址信息, IWF寻址 H0SF, 将 MME信息带给 H0SF, HOSF根据所 述 H0SF信息与 MME交互, 从而间接达到 IWF与 MME交互的效果。
步骤 2103b: IWF保存 MME的地址信息(例如: GUTI ),保证后续 IWF可以寻址 MME, 并与 MME进行交互。 IWF寻址 MME的方法可以是, 根据 MME地址信息(例如: GUTI包含 MME ID— MME的标识) 进行 DNS解析, 获得 MME的地址信息 (例如, IP地址信息) 。
或者是根据 UE提供的 MME信息 (例如: GUTI包含 MME ID— MME的标识) , 查询配 置信息找到与所述 MME信息相关联的 MME的信息。
其中, 本实施例步骤 2102提供一种 IWF获取 MME地址的方法。 其中寻址 MME的方法的 一个实施例具体可以为: 交互功能实体 IWF接收所述用户设备 UE发送的携带 GUTI信息的 消息, 其中所述 GUTI信息包含 MME ID; 所述 IWF解析所述 GUTI信息获得 MME地址信息, 根 据所述 MME地址信息向对应的 MME发送业务处理消息, 其中业务处理消息可以是切换消
息, 获取 UE的位置信息等等。 其中该方法还可以适用于其他场景下, IWF也需要寻址到 MME, 再进一步与 MME进行交互。例如其他场景可以是: MSC发送定位请求消息给 IWF, IWF 需要寻址到 MME, 并从 MME发送获取 UE的位置信息的消息, 并将收到的 UE的位置信息返回 给 MS (:。 其中解析的过程为: IWF可以通过对 UE所提供的 MME ID进行 DNS解析获得 MME IP 地址信息, 具体可以为: 利用 MME ID构造一个域名, 向 DNS服务器查询所述 MME ID对应 的地址, DNS服务器向 IWF返回所述 MME ID对应的 MME的 IP 地址。
本实施例步骤进一步提供了一种 H0SF获取 MME地址的方法, 具体可以为: H0SF接收 交互功能实体 IWF发送的携带 GUTI信息的消息,其中所述 GUTI信息包含 MME ID;所述 H0SF 解析所述 GUTI信息获得 MME地址信息, 根据所述 MME地址信息向对应的 MME发送业务处理 消息。其中 H0SF接收交互功能实体 IWF发送的携带 GUTI信息的消息具体为 IWF向 H0SF注册 过程发送的消息, 具体的解析过程可以参考 IWF的解析过程。 上述实施例的步骤 2103a中 则可以采用本方法。
如附图 22所示, 本发明实施例提供的实现 UE切换方法的实现过程具体可以包括: 步骤 2201, 源端演进的基站(eNodeB)接收 UE上报的测量报告, 触发该 UE从长期演 进计划(LTE, Long Term Evolution)网络切换到全球移动通讯系统(GSM: Global System of Mobile Communication ) 的边缘无线接入系统 (GERAN: GSM EDGE Radio Access Network) /UMTS陆地无线接入网络 (UTRAN: UMTS Territorial Radio Access Network) 网络。
步骤 2202, 源端 eNodeB发送切换请求消息给 MME。
切换请求消息中携带的信元指示源端 MME需要将 LTE网络业务, 例如语音业务, 切换 到 GERAN/UTRAN网络的 CS域。
步骤 2203, MME将切换请求消息发送给 H0SF。 MME寻址 H0SF的方法可以是, 进行 DNS解析(可以是根据 MME提供的 Target ID信息进行解析),获得 H0SF的地址信息(例 如, IP地址信息) 。 如果解析获得多个 H0SF地址信息, 那么 MME可以向所述多个 H0SF 发送切换请求消息。
注: MME获得的 H0SF地址信息就是图 21所述方案中涉及的 IWF注册的 H0SF,或者 MME 获得的多个 H0SF地址信息包含图 21所述方案中涉及的 IWF注册的某一个或者多少 H0SF地 址信息。 具体的可以通过配置 DNS服务器实现。
或者 MME寻址 H0SF的方法可以是, MME与 H0SF之间存在逻辑的对应关系, 所述 MME 与某一个或者多个 H0SF存在关联关系。 根据所述关联关系, MME将切换请求消息发送给
所述某一个或者多个 H0SF。
步骤 2204, H0SF向 IWF发送切换请求消息。
其中, H0SF该 IWF为 EPS网络中的服务 IWF。
步骤 2205, IWF接收切换请求消息, 并将切换请求消息转换成 CS域的切换请求消息, 发送至移动交换中心 (MSC: Mobile Switch Center) 。
该 MSC为 EPS网络中的服务 MSC。
步骤 2206, MSC与目标基站子系统(BSS: Base Station Subsystem)之间进行资源 分配。
步骤 2207, MSC通知 IWF资源分配完成。
步骤 2208, IWF通知 H0SF资源分配完成。
步骤 2209, IWF通知 MME目标侧资源建立完成。
步骤 2210, MME通知源端 eNodeB, 切换准备完成。
步骤 2211, 源端 eNodeB通知 UE切换到目标网络。
步骤 2212, UE接入 GERAN网络, 完成从 LTE网络到 GERAN/UTRAN网络 CS域的切换。 通过上述描绘可以看出, 本发明实施例提供的实现 UE切换的方法, 通过由网络架构 中的功能实体, 比如图 21所述方案, 从而使 H0SF获取 UE注册的 IWF的地址信息, H0SF根 据获取的地址信息, 通知 IWF进行切换处理, 从而保证了在 CSoPS场景下, 用户设备切换 流程的正常进行。
本发明的实施例还提供一种系统, 其特征在于, 包括: 切换选择实体 H0SF221、 交 互功能实体 IWF222和用户设备 UE223, 其中切换选择实体进一步包括获取单元 2311, 接 收单元 2312,切换通知单元 2313,其中,交互功能实体进一步包括 MME地址获取单元 2321, H0SF地址获取单元 2322, 发送单元 2323,
其中 IWF232的 MME地址获取单元 2321, 用于与 UE233进行交互, 获取所述 UE注册的移 动管理实体 MME地址信息;
IWF232的 H0SF地址获取单元 2322,用于根据所述 MME地址信息获得 H0SF的地址信息,
IWF232的发送单元 2323, 用于向所述 H0SF的地址信息对应的 H0SF231提供所述 IWF232自身的地址。
H0SF231的获取单元 2311, 用于获取所述交互功能实体 IWF232的地址信息;
H0SF231的接收单元 2312, 用于接收用户设备 UE进行切换的通知消息;
H0SF231的切换通知单元 2313, 用于根据所述获取的所述 IWF地址信息, 通知所述
IWF232进行切换处理。
本发明的实施例还提供一种切换选择实体, 包括:
接收单元, 用于所述用户设备 UE发送的携带 GUTI信息的消息, 其中所述 GUTI信息包 含 MME ID; 解析单元, 用于解析所述 GUTI信息获得 MME。
其中解析单元进一步还包括: 查询单元用于向 DNS服务器查询所述 MME ID对应的地 址, 接收单元用于 DNS服务器向 H0SF返回所述 MME ID对应的 MME的 IP地址信息。
本发明的实施例还提供一种交互功能实体, 其特征在于, 包括:
接收单元,用于所述 IWF发送的携带 GUTI信息的消息,其中所述 GUTI信息包含 MME ID; 解析单元, 用于解析所述 GUTI信息获得 MME。
其中解析单元进一步还包括: 查询单元用于向 DNS服务器查询所述 MME ID对应的地 址, 接收单元用于 DNS服务器向 H0SF返回所述 MME ID对应的 MME的 IP地址信息
通过以上的实施方式的描述,本领域的技术人员可以清楚地了解到本发明可借助软 件加必需的硬件平台的方式来实现, 当然也可以全部通过硬件来实施, 但很多情况下前 者是更佳的实施方式。基于这样的理解, 本发明的技术方案对背景技术做出贡献的全部 或者部分可以以软件产品的形式体现出来, 该计算机软件产品可以存储在存储介质中, 如 R0M/RAM、 磁碟、 光盘等, 包括若干指令用以使得一台计算机设备(可以是个人计算 机, 服务器, 或者网络设备等)执行本发明各个实施例或者实施例的某些部分所述的方 法。
以上所述, 仅为本发明较佳的具体实施方式, 但本发明的保护范围并不局限于此, 任何熟悉本技术领域的技术人员在本发明揭露的技术范围内, 可轻易想到的变化或替 换, 都应涵盖在本发明的保护范围之内。 因此, 本发明的保护范围应该以权利要求的保 护范围为准。
Claims
1、 一种实现用户设备切换方法, 其特征在于, 包括:
切换选择实体 H0SF获取交互功能实体 IWF的地址信息;
所述 H0SF收到用户设备 UE进行切换的通知消息;
所述 H0SF根据获取的所述 IWF地址信息, 通知所述 IWF进行切换处理。
2、 根据权利要求 1所述的方法, 其特征在于, 所述 H0SF获取的所述所述 IWF地 址信息之前包括:
所述 IWF通过与所述 UE交互, 获取所述 UE注册的移动管理实体 MME地址信息; 所述 IWF根据所述 MME地址信息获得 H0SF的地址信息, 向 H0SF提供所述 IWF自身的地 址。
3、 根据权利要求 2所述的方法, 其特征在于, 所述 IWF向 H0SF提供所述 IWF自 身的地址具体包括: 所述 IWF向 H0SF进行注册, 在注册过程中将 IWF的位置信息上报给 H0SF。
4、 根据权利要求 2所述的方法, 其特征在于, 所述 IWF通过与所述用户设备 UE 交互, 获取所述 UE注册的移动管理实体 MME地址信息具体包括:
所述 UE在向所述 IWF注册时, 将所述 MME地址信息发送至所述 IWF; 或者
当电路域业务触发时, 所述 UE将所述 MME地址信息发送至所述 IWF; 或者
所述 UE收到 MME下发的所述 MME地址信息时, 将所述 MME地址信息发送至所述 IWF。
5、 根据权利要求 2所述的方法, 其特征在于, 所述 IWF根据所述 MME地址信息获 得 H0SF的地址信息包括以下方式至少一种:
根据 UE提供的 MME地址信息进行 DNS解析, 获得 H0SF的地址信息;
根据 UE提供的 MME信息, 查询 IWF预先配置的信息获得与所述 MME信息相关联的 H0SF 的地址信息。
6、 根据权利要求 2或者 3所述的方法, 其特征在于, 获得 H0SF的地址信息为多 个 H0SF的地址信息, 则向 H0SF提供所述 IWF自身的地址具体为: IWF向所述多个 H0SF提 供所述 IWF自身的地址。
7、 一种获取 MME地址信息的方法, 其特征在于, 包括:
交互功能实体 IWF接收所述用户设备 UE发送的携带 GUTI信息的消息, 其中所述 GUTI 信息包含 MME ID;
所述 IWF解析所述 GUTI信息获得 MME地址信息。
8、 根据权利要求 7所述的方法, 其特征在于, 所述 IWF解析 GUTI信息获得 MME地 址信息的方法具体为: 向 DNS服务器查询所述 MME ID对应的地址, DNS服务器向 IWF返回 所述 MME ID对应的 MME的 IP地址信息。
9、 一种获取 MME地址信息的方法, 其特征在于, 包括:
H0SF接收交互功能实体 IWF发送的携带 GUTI信息的消息,其中所述 GUTI信息包含 MME
ID;
所述 HOSF解析所述 GUTI信息获得 MME地址信息。
10、 根据权利要求 9所述的方法, H0SF接收交互功能实体 IWF发送的携带 GUTI信 息的消息具体为 IWF向 H0SF注册过程发送的消息。
11、 根据权利要求 9所述的方法, 其特征在于, 所述 H0SF解析 GUTI信息获得 MME 地址信息的方法具体为: 向 DNS服务器查询所述 MME ID对应的地址, DNS服务器向 H0SF返 回所述 MME ID对应的 MME的 IP地址信息。
12、 一种切换选择实体, 其特征在于, 包括:
获取单元, 用于获取所述交互功能实体 IWF的地址信息;
接收单元, 用于接收用户设备 UE进行切换的通知消息;
切换通知单元,用于根据所述获取的所述 IWF地址信息,通知所述 IWF进行切换处理。
13、 一种切换选择实体, 其特征在于, 包括:
接收单元, 用于所述用户设备 UE发送的携带 GUTI信息的消息, 其中所述 GUTI信息包 含 MME ID;
解析单元, 用于解析所述 GUTI信息获得匪 E。
14、 一种交互功能实体, 其特征在于, 包括:
MME地址获取单元, 用于与 UE进行交互, 获取所述 UE注册的移动管理实体 MME地址信 息;
H0SF地址获取单元, 用于根据所述 MME地址信息获得 H0SF的地址信息;
发送单元, 用于向 所述 H0SF的地址信息对应的 H0SF提供所述 IWF自身的地址。
15、 一种交互功能实体, 其特征在于, 包括:
接收单元,用于所述 IWF发送的携带 GUTI信息的消息,其中所述 GUTI信息包含 MME ID; 解析单元, 用于解析所述 GUTI信息获得 MME。
16、 一种实现用户设备切换方法, 其特征在于, 包括:
移动管理实体通过与网络中的功能实体进行交互,获取用户设备注册的交互功能实
体的地址信息;
移动管理实体根据获取的所述交互功能实体地址信息,通知所述交互功能实体进行 切换处理。
17、 根据权利要求 16所述的方法, 其特征在于, 所述方法包括:
移动管理实体通过与用户设备进行交互,获取所述用户设备注册的交互功能实体的 地址信息。
18、 根据权利要求 17所述的方法, 其特征在于, 所述移动管理实体与用户设备 进行交互包括:
所述用户设备在电路域业务触发下, 向所述移动管理实体上报交互功能实体的地址 信息;
或者当所述用户设备完成在所述交互功能实体注册以后,主动向所述移动管理实体 上报交互功能实体的地址信息;
或者当所述用户设备注册的交互功能实体变更后,所述用户设备主动向所述移动管 理实体上报交互功能实体的地址信息。
19、 根据权利要求 17或 18所述的方法, 其特征在于, 所述移动管理实体与用户 设备交互包括:
用户设备通过发送非接入层消息,将所述用户设备注册的交互功能实体地址信息上 报至所述移动管理实体。
20、 根据权利要求 16所述的方法, 其特征在于, 所述方法包括:
所述移动管理实体接收所述用户设备发起的附着请求消息或跟踪区更新请求消息, 所述消息中携带所述用户设备是否支持电路交换域连接演进的分组网络的能力信息,或 者携带指示网络侧将交互功能实体地址传递给所述用户设备的指示信息;
所述移动管理实体根据所述消息, 通过服务网关, 向分组数据网络网关请求提供交 互功能实体地址信息;
所述移动管理实体将所述分组数据网络网关返回的交互功能实体地址信息发送至 所述用户设备。
21、 根据权利要求 16所述的方法, 其特征在于, 所述方法包括:
移动管理实体通过与所述用户设备注册的交互功能实体进行交互,获取所述交互功 能实体的地址信息。
22、 根据权利要求 21所述的方法, 其特征在于, 所述移动管理实体通过与所述
用户设备注册的交互功能实体进行交互包括:
所述交互功能实体通过与所述用户设备或者归属用户服务器交互,获取所述用户设 备注册的移动管理实体地址信息;
所述交互功能实体根据所述移动管理实体地址信息, 向所述移动管理实体上报所述 交互功能实体的地址信息。
23、 根据权利要求 22所述的方法, 其特征在于, 所述移动管理实体地址信息为 包含有移动管理实体标识的全球唯一临时标识或移动管理实体标识。
24、 根据权利要求 22所述的方法, 其特征在于, 所述交互功能实体通过与所述 用户设备交互, 获取所述用户设备注册的移动管理实体地址信息包括:
所述用户设备在向所述交互功能实体注册时, 或者由电路域业务触发时, 或者收到 移动管理实体下发的所述移动管理实体地址信息时,将所述移动管理实体地址信息发送 至所述交互功能实体处。
25、 根据权利要求 22所述的方法, 其特征在于, 所述交互功能实体通过与归属 用户服务器交互, 获取所述用户设备注册的移动管理实体地址信息包括:
所述交互功能实体通过设置的接口, 向所述归属用户服务器请求所述用户设备注册 的移动管理实体地址信息。
26、 根据权利要求 16所述的方法, 其特征在于, 所述方法包括:
所述移动管理实体通过与归属用户服务器进行交互,获取所述用户设备注册的交互 功能实体的地址信息。
27、 根据权利要求 26所述的方法, 其特征在于, 所述移动管理实体通过与归属 用户服务器进行交互, 获取所述用户设备注册的交互功能实体的地址信息包括:
所述移动管理实体接收所述归属用户服务器发送的签约数据,所述签约数据中包括 所述交互功能实体的地址信息。
28、 根据权利要求 27所述的方法, 其特征在于, 所述归属用户服务器发送签约 数据包括:
所述归属用户服务器接收移动交换中心或交互功能实体上报的所述交互功能实体 的地址信息;
所述归属用户服务器将所述交互功能实体的地址信息作为签约数据,发送至所述移 动管理实体处。
29、 根据权利要求 26所述的方法, 其特征在于, 所述移动管理实体与归属用户
服务器进行交互包括:
所述移动管理实体发送向所述归属用户服务器发送获取用户设备注册的交互功能 实体信息请求;
所述移动管理实体接收所述归属用户服务器返回的信息,所述信息中包括所述用户 设备注册的交互功能实体地址信息。
30、 根据权利要求 16所述的方法, 其特征在于, 移动管理实体通过与网络中的 功能实体进行交互, 获取用户设备注册的交互功能实体的地址信息包括:
所述用户设备注册的交互功能实体触发策略和计费规则功能实体发起会话修改流 程, 并将所述交互功能实体自身的地址信息发送至所述策略和计费规则功能实体; 所述策略和计费规则功能实体向分组数据网络网关提供策略和计费控制策略, 并将 所述交互功能实体地址信息传递给所述分组数据网络网关;
所述分组数据网络网关通过服务网关, 向所述移动管理实体发送创建承载消息, 所 述创建承载消息中包含所述交互功能实体地址信息。
31、 根据权利要求 16所述的方法, 其特征在于, 所述方法包括:
所述移动管理实体通过发送上下文请求消息或转发重置消息,将所述用户设备注册 的交互功能实体地址信息发送至目标侧移动管理实体。
32、 根据权利要求 16、 17、 21、 26、 29或 31任一项所述的方法, 其特征在于, 所述方法还包括:
获取交互功能实体地址信息的移动管理实体, 根据所述交互功能实体地址信息, 向 所述交互功能实体进行注册。
33、 一种实现用户设备切换的系统, 其特征在于, 所述系统包括:
移动管理实体, 用于通过与网络中的功能实体进行交互, 获取用户设备注册的交互 功能实体的地址信息, 并根据获取的所述交互功能实体地址信息, 通知所述交互功能实 体进行切换处理;
交互功能实体,用于在将所述移动管理实体发送的切换通知转换为电路交换域切换 信息后, 将所述电路交换域切换信息发送至移动交换中心, 并接收所述移动交换中心发 送的资源分配完成通知, 转发至所述移动管理实体。
34、 根据权利要求 33所述的系统, 其特征在于, 所述系统还包括:
演进的基站, 用于在用户设备的触发下, 发起所述用户设备切换流程, 向所述移动 管理实体发送切换信息, 并在接收到所述移动管理实体发送的切换准备完成信息后, 触
发所述用户设备进行切换;
移动交换中心, 用于在接收到所述交互功能实体发送的所述电路交换域切换信息 后, 与目标基站子系统进行资源分配, 并向交互功能实体发送资源分配完成通知; 目标基站子系统, 用于与所述移动交换中心进行资源分配。
35、 一种移动管理实体, 其特征在于, 包括:
地址信息获取模块, 用于通过与网络中的功能实体交互, 获取用户设备注册的交互 功能实体地址信息;
切换通知模块, 用于根据所述地址信息获取模块获取的所述交互功能实体地址信 息, 通知所述交互功能实体进行切换处理。
36、 一种用户设备, 其特征在于, 包括:
地址信息获取模块, 用于获取用户设备注册的交互功能实体地址信息; 地址信息上报模块, 用于通过与移动管理实体交互, 将所述地址信息获取模块获取 的所述交互功能实体的地址信息, 上报至所述移动管理实体。
37、 一种交互功能实体, 其特征在于, 包括:
地址信息上报模块, 用于通过与移动管理实体交互, 将自身地址信息, 上报至所述 移动管理实体;
切换处理模块, 用于根据所述移动管理实体发送的切换通知, 进行切换处理。
38、 一种用户服务器, 其特征在于, 包括:
地址信息获取模块, 用于获取用户设备注册的交互功能实体地址信息; 地址信息上报模块, 用于通过与移动管理实体交互, 将所述地址信息获取模块获取 的所述交互功能实体的地址信息, 上报至所述移动管理实体。
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US20110249654A1 (en) | 2011-10-13 |
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US8995399B2 (en) | 2015-03-31 |
US20140140325A1 (en) | 2014-05-22 |
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