WO2016062046A1 - 语音回落的方法、装置及系统 - Google Patents

语音回落的方法、装置及系统 Download PDF

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Publication number
WO2016062046A1
WO2016062046A1 PCT/CN2015/077016 CN2015077016W WO2016062046A1 WO 2016062046 A1 WO2016062046 A1 WO 2016062046A1 CN 2015077016 W CN2015077016 W CN 2015077016W WO 2016062046 A1 WO2016062046 A1 WO 2016062046A1
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vlr
msc
request
international roaming
network
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PCT/CN2015/077016
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English (en)
French (fr)
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刘利锋
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中兴通讯股份有限公司
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Publication of WO2016062046A1 publication Critical patent/WO2016062046A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W40/00—Communication routing or communication path finding
    • H04W40/02—Communication route or path selection, e.g. power-based or shortest path routing

Definitions

  • the present invention relates to the field of communications, and in particular to a method, device and system for voice fallback.
  • CDMA Code Division Multiple Access
  • CDMA network operators usually implement an ANSI-41MAP (American National Standards Institute-41 Mobile Application Part) and GSM MAP protocol agreement by deploying an International Roaming Gateway (French Location Register, FLR). Conversion provides the ability for CDMA dual-mode (and multi-mode) end users to roam between the GSM network and the CDMA network.
  • ANSI-41MAP American National Standards Institute-41 Mobile Application Part
  • GSM MAP Geographical System
  • FLR International Roaming Gateway
  • the FLR acts as the mobile switching center/visitor location register (MSC/VLR) and the Short Message Center (SMC). And the Home Location Register (HLR) network element role, and the MSC/VLR, Message Center (MC) and HLR network element roles of the CDMA network implement the user to GSM/UMTS. roaming.
  • MSC/VLR mobile switching center/visitor location register
  • SMC Short Message Center
  • HLR Home Location Register
  • MC Message Center
  • HLR Home Location Register
  • LTE Long Term Evolution
  • LTE networks have been deployed in several countries.
  • a CDMA user using an LTE-capable dual-mode terminal will attach to the LTE network in the LTE network coverage area during international roaming. Therefore, when a user roams on an LTE network, the problem of how to use the voice service is applied.
  • MTRR Mobile Terminating Roaming Retry
  • MTRF Mobile Terminating Roaming Forwarding
  • the CSFB-capable LTE terminal is dropped back to the 2G/3G network through the CSFB technology, and the voice service is provided by the traditional 2G/3G network.
  • the connection rate of the voice drop is not high, and connection errors are likely to occur.
  • connection rate of the voice fallback in the international roaming process of the terminal is not high, and the connection error is easy to occur.
  • the invention provides a method, a device and a system for voice fallback, so as to at least solve the problem that the connection rate of the voice fallback in the international roaming process of the terminal across the network is not high, and the connection error is easy to occur.
  • a method for voice fallback comprising: an international roaming gateway receiving a route query request of a home location register HLRe, wherein the route query request is a multimode called by an international roaming state The location query request initiated by the terminal to the HLRe; the international roaming gateway queries the multimode terminal voice fallback network according to the route query request, whether the old and new mobile switching center/visit location register MSC/VLR supports mobile terminal roaming Testing the MTRR; in the case that the multimode terminal falls back to the 2G/3G network and the MSC/VLR supports the MTRR, the international roaming gateway queries whether the location update procedure ends; and the international roaming gateway receives the detection location update procedure In the case of the end, a roaming number request PRN is initiated to the newly registered MSC/VLR.
  • the roaming number request PRN is sent to the newly registered MSC/VLR.
  • the method further includes: waiting for the location update process to end if the international roaming gateway receives the detection location update process without ending.
  • the method for the international roaming gateway to query the location update process includes: the international roaming gateway receives the request for sending routing information sent by the network MSC, and detects the new MSC/VLR of the multimode terminal. Whether the location update ends.
  • the method further includes: when the receiving the roaming retry support parameter in the PRN, the request routing information SRI response of the international roaming gateway to the gateway mobile switching center GMSC carries a roaming retry flag; In the case of the transparent transmission of the PRN, the request routing information SRI response of the international roaming gateway to the gateway mobile switching center GMSC carries the call reference number.
  • a method for voice fallback comprising: an international roaming gateway receiving a route query request of an HLRe, wherein the route query request is a called multimode terminal in an international roaming state Caused by a location query request initiated by the HLRe; the international roaming gateway according to the way Querying whether the new MSC/VLR of the multimode terminal voice fallback network supports the mobile terminal roaming forwarding MTRF by the query request; the multimode terminal falls back to the 2G/3G network and the MSC/VLR supports the MTRF, the international The roaming gateway initiates a cancel location request to the old MSC/VLR; wherein the cancel location request carries the MTRF support and authorization flag and the new MSC/VLR number.
  • the international roaming gateway after the international roaming gateway queries the multi-mode terminal voice fallback network, whether the old and new MSC/VLRs support the mobile terminal roaming and forwarding the MTRF, the international roaming gateway further includes: falling back to the multi-mode terminal In the case that the 2G/3G network and the MSC/VLR do not support the MTRF, the international roaming gateway initiates a cancel location request to the old MSC/VLR; wherein the cancel location request carries the MTRF support and no authorization flag and the new MSC/ VLR number.
  • a device for voice fallback which is located at an international roaming gateway, and includes: a first receiving module, configured to receive a routing query request of a home location register HLRe, wherein the routing query request Is caused by a location query request initiated by the called multimode terminal in an international roaming state to the HLRe; the first support module is configured to query the multimode terminal voice drop network new and old mobile switching center according to the route query request Whether the location register MSC/VLR supports the mobile terminal roaming retry MTRR; the query module is configured to query whether the location update process ends when the multimode terminal falls back to the 2G/3G network and the MSC/VLR supports the MTRR And a requesting module, configured to initiate a roaming number request PRN to the newly registered MSC/VLR if the international roaming gateway receives the end of the detection location update procedure.
  • the apparatus further includes: a waiting module, configured to wait for the location update process to end if the international roaming gateway receives the detection location update process without ending.
  • the support module is further configured to: upon receiving the sending routing information request sent by the network MSC, detecting whether the location update of the new MSC/VLR of the multimode terminal ends.
  • a device for voice fallback which is located at an international roaming gateway, and includes: a second receiving module, configured to receive a routing query request of the HLRe, wherein the routing query request is The second roaming terminal of the international roaming state is caused by the location query request initiated by the HLRe; the second supporting module is configured to query, according to the routing query request, whether the old and new MSC/VLR of the multimode terminal voice fallback network supports mobile Terminal roaming forwarding MTRF; canceling module, setting the multimode terminal to fall back to the 2G/3G network and, in the case that the MSC/VLR supports MTRF, initiating a cancel location request to the old MSC/VLR; wherein the canceling the location request It carries the MTRF support and authorization flags and the new MSC/VLR number.
  • the method includes: the canceling module is further configured to initiate a cancel location request to the old MSC/VLR if the multimode terminal falls back to the 2G/3G network and the MSC/VLR does not support the MTRF;
  • the cancellation location request carries the MTRF support and no authorization flag and the new MSC/VLR number.
  • a system for voice fallback comprising: an international roaming gateway, wherein the international roaming gateway comprises the above-mentioned voice fallback device.
  • an international roaming gateway receives a route query request of a home location register HLRe, wherein the route query request is caused by a location query request initiated by the called multimode terminal in an international roaming state to the HLRe; the international roaming The gateway queries the multi-mode terminal voice fallback network according to the route query request whether the old and new mobile switching center/visit location register MSC/VLR supports the mobile terminal roaming retry MTRR; the multimode terminal falls back to the 2G/3G network and the MSC/VLR In the case of supporting the MTRR, the international roaming gateway queries whether the location update process ends; if the international roaming gateway receives the detection location update process, the roaming number request PRN is initiated to the newly registered MSC/VLR, and the terminal in the related art is solved.
  • the connection rate of voice fallback during cross-network international roaming is not high, and the problem of connection error is easy to occur, which improves the connection rate of voice fallback and reduces the wrong connection.
  • FIG. 1 is a flow chart 1 of a method for voice fallback according to an embodiment of the present invention
  • FIG. 2 is a second flowchart of a method for voice fallback according to an embodiment of the present invention
  • FIG. 3 is a block diagram of a structure of a device for voice fallback according to an embodiment of the present invention.
  • FIG. 4 is a second structural block diagram of a device for voice fallback according to an embodiment of the present invention.
  • FIG. 5 is a flow chart of a first embodiment of an MTRR after a voice fallback has successfully retrieved a roaming number in accordance with a preferred embodiment of the present invention
  • FIG. 6 is a flow diagram of a second embodiment of an MTRR after a voice fallback has successfully retrieved a roaming number in accordance with a preferred embodiment of the present invention
  • FIG. 7 is a flow diagram of a third embodiment of a voice fallback reselection of an MTRF of a MSC in accordance with a preferred embodiment of the present invention.
  • FIG. 1 is a flowchart 1 of a method for voice fallback according to an embodiment of the present invention. As shown in FIG. 1, the process includes the following steps:
  • Step S102 The international roaming gateway receives a route query request of the home location register HLRe, where the route query request is caused by a location query request initiated by the called multimode terminal in an international roaming state to the HLRe;
  • Step S104 The international roaming gateway queries the multi-mode terminal voice fallback network according to the route query request, whether the old and new mobile switching center/visiting location register MSC/VLR supports the mobile terminal roaming retry MTRR;
  • Step S106 in the case that the multimode terminal falls back to the 2G/3G network and the MSC/VLR supports the MTRR, the international roaming gateway queries whether the location update process ends;
  • Step S108 In case the international roaming gateway receives the detection location update procedure, the roaming number request PRN is initiated to the newly registered MSC/VLR.
  • the international roaming gateway queries whether the old and new mobile MSC/VLR of the multimode terminal voice fallback network supports the MTRR according to the routing query request; when the multimode terminal falls back to the 2G/3G network and the MSC/VLR supports the MTRR, the international The roaming gateway queries whether the location update process ends; when the international roaming gateway receives the detection location update process, the PRN is initiated to the newly registered MSC/VLR, and the call rate of the voice fallback during the international roaming of the terminal across the network is solved. Not high, prone to connection errors, improve the connection rate of voice fallback, and reduce the wrong connection.
  • the international roaming gateway if the international roaming gateway receives the detection location update process without ending, it waits for the location update process to end, until the international roaming gateway receives the detection location update process ends, and registers with the new one.
  • MSC/VLR initiates roaming number request PRN
  • whether the international roaming gateway queries the location update process may include: the international roaming gateway receives the sending routing information request sent by the network MSC, and detects the location update of the new MSC/VLR of the multimode terminal. Whether it is over.
  • the request routing information SRI response of the international roaming gateway to the gateway mobile switching center GMSC carries the roaming retry flag;
  • the international roaming gateway sends a call reference number to the request routing information SRI of the gateway mobile switching center GMSC.
  • FIG. 2 is a second flowchart of a method for voice fallback according to an embodiment of the present invention. As shown in FIG. 2, the process includes the following steps:
  • Step S202 The international roaming gateway receives a route query request of the HLRe, where the route query request is caused by a location query request initiated by the called multimode terminal in an international roaming state to the HLRe;
  • Step S204 The international roaming gateway queries the multi-mode terminal voice fallback network according to the route query request whether the old and new MSC/VLR supports the mobile terminal roaming forwarding MTRF;
  • Step S206 the multimode terminal falls back to the 2G/3G network, and when the MSC/VLR supports the MTRF, the international roaming gateway initiates a cancel location request to the old MSC/VLR; wherein the cancel location request carries the MTRF support and authorization.
  • logo and new MSC/VLR number the number of MSC/VLRs.
  • the international roaming gateway queries whether the old and new MSC/VLR of the multimode terminal voice fallback network supports the mobile terminal roaming forwarding MTRF according to the route query request, and the multimode terminal falls back to the 2G/3G network and supports the MSC/VLR.
  • the international roaming gateway initiates a cancel location request to the old MSC/VLR; wherein the cancel location request carries the MTRF support and authorization flag and the new MSC/VLR number.
  • the international roaming gateway queries the multi-mode terminal voice fallback network according to the route query request whether the old and new MSC/VLR supports the mobile terminal roaming and forwarding the MTRF, and further includes: falling back to the 2G/3G network in the multimode terminal.
  • the international roaming gateway initiates a cancel location request to the old MSC/VLR; wherein the cancel location request carries the MTRF support and no authorization flag and the new MSC/VLR number.
  • a device for voice fallback is also provided, which is used to implement the foregoing embodiments and preferred embodiments, and has not been described again.
  • the term "module” may implement a combination of software and/or hardware of a predetermined function.
  • the apparatus described in the following embodiments is preferably implemented in software, hardware, or a combination of software and hardware, is also possible and contemplated.
  • FIG. 3 is a block diagram of a structure of a device for voice fallback according to an embodiment of the present invention. As shown in FIG. 3, the device is located in an international roaming gateway, and includes a first receiving module 32, a first supporting module 34, a query module 36, and a requesting module 38. The device will be described below.
  • the first receiving module 32 is configured to receive a routing query request of the home location register HLRe, wherein the routing query request is caused by a location query request initiated by the called multimode terminal in an international roaming state to the HLRe;
  • the first support module 34 is configured to query, according to the route query request, whether the multi-mode terminal voice fallback network new and old mobile switching center/visit location register MSC/VLR supports mobile terminal roaming retry MTRR;
  • the query module 36 is configured to query whether the location update process ends when the multimode terminal falls back to the 2G/3G network and the MSC/VLR supports the MTRR.
  • the requesting module 38 is configured to initiate a roaming number request PRN to the newly registered MSC/VLR if the international roaming gateway receives the end of the detection location update procedure.
  • the international roaming gateway queries whether the old and new mobile MSC/VLR of the multimode terminal voice return network supports the MTRR according to the routing query request; when the multimode terminal falls back to the 2G/3G network and the MSC/VLR supports the MTRR, the international The roaming gateway queries whether the location update process ends; when the international roaming gateway receives the detection location update process, the PRN is initiated to the newly registered MSC/VLR, and the call rate of the voice fallback during the international roaming of the terminal across the network is solved. Not high, prone to connection errors, improve the connection rate of voice fallback, and reduce the wrong connection.
  • the apparatus further includes: a waiting module, configured to wait for the location update process to end if the international roaming gateway receives the detection location update process without ending.
  • the support module is further configured to: upon receiving the sending routing information request sent by the network MSC, detecting whether the location update of the new MSC/VLR of the multimode terminal is ended.
  • FIG. 4 is a block diagram of a structure of a device for voice fallback according to an embodiment of the present invention. As shown in FIG. 4, the device is located in an international roaming gateway, and includes a second receiving module 42, a second supporting module 44, and a canceling module 46. The device is described.
  • the second receiving module 42 is configured to receive a route query request of the HLRe, where the route query request is caused by a location query request initiated by the called multimode terminal in an international roaming state to the HLRe;
  • the second support module 44 is configured to query, according to the route query request, whether the new MSC/VLR of the multimode terminal voice fallback network supports the mobile terminal roaming forwarding MTRF;
  • the canceling module 46 is configured to: when the multimode terminal falls back to the 2G/3G network and in the case that the MSC/VLR supports the MTRF, initiate a cancel location request to the old MSC/VLR; wherein the cancel location request carries the MTRF support and authorization flag And the new MSC/VLR number.
  • the international roaming gateway queries the multi-mode terminal voice fallback network according to the route query request whether the old and new MSC/VLR supports the mobile terminal roaming and forwarding the MTRF, and the multi-mode terminal falls back to the 2G/3G network and supports the MSC/VLR.
  • the international roaming gateway initiates a cancel location request to the old MSC/VLR; wherein the cancel location request carries the MTRF support and authorization flag and the new MSC/VLR number.
  • the canceling module 46 is further configured to initiate a cancel location request to the old MSC/VLR if the multimode terminal falls back to the 2G/3G network and the MSC/VLR does not support the MTRF; wherein the cancel location request carries the MTRF support and Do not authorize the logo and the new MSC/VLR number.
  • a system for voice fallback is further included, and the system includes the above-mentioned international roaming gateway, and the international roaming gateway includes the voice fallback device.
  • the preferred embodiment provides a method for implementing voice fallback of CDMA users when roaming in an LTE network.
  • the method is suitable for CDMA dual mode (also multimode) user information stored in a CDMA home location register (home location register emulation)
  • HLRe home location register emulation
  • the GSM/UMTS information corresponding to the international roaming of CDMA users is stored in the international roaming gateway FLR.
  • the FLR plays the CDMA MSC/ The VLR role returns a route response to the HLRe.
  • the temporary local number (Temporary Local Directory Number, TLDN) of the route response carries a redirection label (RedirectNum).
  • the FLR acts as the HLR role in the GSM/UMTS network.
  • the FLR records the location update indication until the location update process ends.
  • the SEND_ROUTING_INFORMATION request sent by the MSC of the GSM/UMTS is received in the process, the current user is detected. Whether the location update of the new MSC/VLR is finished. If the location update process is not completed, wait for the location update process to complete, and then send a Request for Roaming Number (PRN) request to the new MSC/VLR.
  • PRN Request for Roaming Number
  • the request carries a roaming retry flag, and the roaming number is provided in the PRN.
  • the request message carries the parameter of receiving roaming retry support (mt RoamingRetrySupported).
  • the FLR acts as the HLR role in the GSM/UMTS network.
  • the FLR carries the support and authorization flag (MTRFmtrf-SupportedAndAuthorized) in the MSC/VLR transmission deletion location (CANCEL_LOCATION) message registered by the user.
  • new MSC/VLR number newMSC-Number, newVLR-Number.
  • FIG. 5 is a flowchart of a first embodiment of an MTRR after a voice fallback has successfully retrieved a roaming number according to a preferred embodiment of the present invention.
  • the first embodiment of the present invention provides a method for interacting between the FLR and other network element entities, and the method includes the following steps:
  • Step 501 The CDMA Gateway Mobile Switching Center (GMSC) receives a call request from the user, and initiates a location query request to the HLRe where the called user is located.
  • GMSC CDMA Gateway Mobile Switching Center
  • Step 502 HLRe initiates a route query to the FLR according to the recorded user location.
  • Step 503 The present invention requires the FLR to determine that if the current user is in an international roaming state and the MSC/VLR where the user is located allows the MTRR, the routing information is returned to the HLRe in the format of the routing code and the mobile subscriber directory number (router code+Mobile Directory Number). For short, RN+MDN), where RN is the routing code of the GSM/UMTS GMSC.
  • Step 504 After receiving the routing code returned by the FLR, the HLRe returns a routing code to the CDMA GMSC.
  • Step 505 The CDMA GMSC redirects the call to the GMSC of the GSM/UMTS according to the routing information returned by the HLRe.
  • Step 506 The GMSC initiates a route query to the FLR according to the route configuration, where the request carries the MT Roaming Retry Supported identifier;
  • Step 507 The FLR acts as an HLR, and sends a PRN to the MSC/VLR where the user is located, requesting a roaming number;
  • Step 508 After receiving the roaming number request, the MSC/VLR returns the roaming number.
  • Step 509 The FLR returns a roaming number to the GMSC by using an SRI response.
  • Step 510 The GMSC initiates an initial address message (IMA) to the MSC/VLR where the user is located according to the roaming number.
  • IMA initial address message
  • Step 511 The MSC/VLR pages the user to the Mobile Management Entity (MME) through the SGs interface, and triggers the user to fall back from the LTE to the 2/3G network.
  • MME Mobile Management Entity
  • Step 512 After the user falls back to the 2/3G network, the MSC/VLR is reselected for location registration, and the selected MSC/VLR is different from the currently registered MSC/VLR;
  • Step 513 The new MSC/VLR initiates a location update request to the FLR.
  • Step 514 After receiving the location update request of the new MSC/VLR, the FLR sends a cancel location to the previously registered MSC/VLR, requesting to delete the user information.
  • Step 515 The cancel location response returned by the old MSC/VLR to the FLR;
  • Step 516 The FLR simulates the MSC/VLR to initiate a location update request to the HLRe of the CDMA;
  • Step 517 After the HLRe completes the update of the user location information, the HLRe returns a response to the location update to the FLR.
  • Step 518 The old MSC/VLR sends a Resume Call Handling (hereinafter referred to as RCH) to the GMSC to indicate that the user has sent a roaming retry, and the GMSC confirms that the message returns a response.
  • RCH Resume Call Handling
  • Step 519 The GMSC sends a REL (Release), Release release and the channel resource between the old MSC/VLR to the old MSC/VLR.
  • REL Release
  • Step 520 The FLR simulates the HLR, and inserts user data into the new MSC/VLR.
  • Step 521 The GMSC re-initiates a routing request to the FLR.
  • Step 522 The FLR continues to insert data into the MSC/VLR;
  • Step 523 After the FLR completes data insertion, sending a location update response to the MSC/VLR to complete the location update process.
  • Step 524 The present invention requires the FLR waiting location update process to end, and after the FLR detection location update process has ended, requesting a roaming number from the new MSC/VLR;
  • Step 525 The new MSC/VLR returns a roaming number to the FLR.
  • Step 526 The FLR returns a Request Routing Information (Sending) MAP request routing information response to the GMSC, and carries the roaming number.
  • Send a Request Routing Information (Sending) MAP request routing information response to the GMSC, and carries the roaming number.
  • Step 527 The GMSC sends an IAM request to the MSC/VLR where the user is located according to the roaming number.
  • Step 528 The new MSC/VLR sends a location update acceptance response to the user terminal, and completes the attachment of the user in the MSC/VLR.
  • Step 529 The user terminal completes a Temporary Mobile Subscriber Identity (TMSI);
  • TMSI Temporary Mobile Subscriber Identity
  • Step 530 The new MSC/VLR initiates a call setup request, requesting to initiate a call;
  • Step 531 The mobile phone completes the call confirmation and completes the establishment of the call.
  • the PRN needs to be transparently transmitted.
  • the receiving roaming retry support parameter (mtRoamingRetrySupported) is carried in the PRN request message.
  • the FLR detects whether there is an unfinished location update process. If there is an unfinished location update process, the PRN request is initiated after the location update process ends.
  • Steps 516 and 517 of the first embodiment are implemented, and steps 518 and 519 are not followed.
  • FIG. 6 is a flowchart of a second embodiment of an MTRR after a voice fallback has successfully retrieved a roaming number according to a preferred embodiment of the present invention.
  • the present invention provides a method for interacting between the FLR and other network element entities, including the following steps:
  • Step 601 The CDMA GMSC receives a call request from the user, and initiates a location query request to the HLRe where the called user is located.
  • Step 602 HLRe initiates a routing query to the FLR according to the recorded user location.
  • Step 603 The present invention requires the FLR to determine that the current user is in the international roaming state and the MSC/VLR where the user is located allows the MTRR, and then returns the routing information to the HLRe in the format of RN+MDN, where the RN is the routing code of the GSM/UMTS GMSC.
  • Step 604 After receiving the routing code returned by the FLR, the HLRe returns a routing code to the CDMA GMSC.
  • Step 605 The CDMA GMSC redirects the call to the GMSC of the GSM/UMTS according to the routing information returned by the HLRe.
  • Step 606 The GMSC initiates a route query to the FLR according to the routing configuration, where the request carries the MT Roaming Retry Supported flag.
  • Step 607 The FLR acts as an HLR, and sends a PRN to the MSC/VLR where the user is located, requesting a roaming number;
  • Step 608 After receiving the roaming number request, the MSC/VLR initiates a pre-paging to trigger the user to fall back from the LTE to the 2/3G network.
  • Step 609 After the user falls back to the 2/3G network, the MSC/VLR is reselected for location registration, and the selected MSC/VLR is different from the currently registered MSC/VLR;
  • Step 610 The new MSC/VLR exchanges with the old MSC/VLR through an Identification message whether there is an ongoing call.
  • Step 611 The new MSC/VLR initiates a location update request to the FLR.
  • Step 612 After receiving the location update request of the new MSC/VLR, the FLR sends a cancel location to the previously registered MSC/VLR, requesting to delete the user information.
  • Step 613 The cancel location response returned by the old MSC/VLR to the FLR;
  • Step 614 The FLR simulates the MSC/VLR to initiate a location update request to the HLRe of the CDMA;
  • Step 615 After the HLRe completes the update of the user location information, the HLRe returns a response to the location update to the FLR.
  • Step 616 The FLR simulates the HLR, and inserts user data into the new MSC/VLR.
  • Step 617 The old MSC/VLR returns a PRN response to the FLR, and carries the default user error indication and the error reason is: MTRR;
  • Step 618 The FLR returns an SRI response to the GMSC, and the error indication and the error cause of the absent user are MTRR.
  • Step 619 The GMSC initiates a second SRI request to the FLR.
  • Step 620 The FLR continues to insert data into the MSC/VLR.
  • Step 621 After the FLR completes the data insertion, sending a location update response to the MSC/VLR to complete the location update process.
  • Step 622 The present invention requires the FLR waiting location update process to end. After the FLR detection location update process has ended, the roaming number is requested from the new MSC/VLR.
  • Step 623 The new MSC/VLR returns a roaming number to the FLR.
  • Step 624 The FLR returns an SRI response to the GMSC, carrying the roaming number.
  • Step 625 The GMSC sends an IAM request to the MSC/VLR where the user is located according to the roaming number.
  • Step 626 The new MSC/VLR sends a location update acceptance response to the user terminal, and completes the attachment of the user in the MSC/VLR.
  • Step 627 The user terminal completes the TMSI allocation.
  • Step 628 The new MSC/VLR initiates a call setup request, requesting to initiate a call;
  • Step 629 The mobile phone completes the call confirmation and completes the establishment of the call.
  • step 607 of the first embodiment the following description is given:
  • the PRN needs to be transparently transmitted.
  • the mtRoamingRetrySupported parameter is carried in the PRN request message.
  • the FLR detects whether there is an unfinished location update process. If there is an unfinished location update process, the PRN request is initiated after the location update process ends.
  • Steps 614 and 615 of the second embodiment are implemented, and there is no sequential relationship with steps 616 and 617.
  • FIG. 7 is a flowchart of a third embodiment of a voice fallback reselection MTRF of a voice back according to a preferred embodiment of the present invention. As shown in FIG. 7, when the user is on the LTE network, the called service is performed.
  • An embodiment of triggering a voice fallback to reselect an MTRF process of an MSC includes the following steps:
  • Step 701 The CDMA GMSC receives a call request from the user, and initiates a location query request to the HLRe where the called user is located.
  • Step 702 HLRe initiates a route query to the FLR according to the recorded user location.
  • Step 703 The FLR acts as an HLR role, and sends a PRN to the MSC/VLR where the user is located, requesting a roaming number.
  • Step 704 After receiving the roaming number request, the MSC/VLR returns the roaming number.
  • Step 705 The FLR receives the routing number returned by the MSC/VLR, and returns a TLDN number to the HLRe through a route request (routereq) response message.
  • Step 706 HLRe returns a location query response to the CDMA GMSC.
  • Step 707 The CDMA GMSC sends an IAM message to the MSC/VLR where the called party is located according to the result of the location query.
  • Step 708 The MSC/VLR advertises the user to the MME through the SGs interface, and triggers the user to fall back from the LTE to the 2/3G network.
  • Step 709 After the user falls back to the 2/3G network, the MSC/VLR is reselected for location registration, and the selected MSC/VLR is different from the current MSC/VLR;
  • Step 710 The new MSC/VLR sends Send Identification to the old MSC/VLR, carrying the identifier supporting the MTRF and the new MSC/VLR number.
  • Step 711 The new MSC/VLR initiates a location update request to the FLR, where the request carries an indication supporting the MTRF.
  • Step 712 After receiving the location update request of the new MSC/VLR, the FLR sends a cancel location to the previously registered MSC/VLR.
  • the invention specifically requires the request to carry the MTRF indication and the new MSC/VLR number.
  • Step 713 The old MSC/VLR responds to the cancel location returned by the FLR, and stops paging the user;
  • Step 714 The FLR simulates the MSC/VLR to initiate a location update request to the HLRe of the CDMA;
  • Step 715 After the HLRe completes the update of the user location information, the HLRe returns a response to the location update to the FLR.
  • Step 716 The FLR simulates the HLR, and inserts user data into the new MSC/VLR.
  • Step 717 The old MSC/VLR initiates a PRN request to the new MSC/VLR, where the request carries the MTRF indication and the old MSC/VLR number;
  • Step 718 The FLR continues to insert data into the MSC/VLR.
  • Step 719 After the FLR completes data insertion, sending a location update response to the MSC/VLR to complete the location update process.
  • Step 720 The new MSC/VLR returns a PRN response to the old MSC/VLR, and carries the routing number.
  • Step 721 The old MSC/VLR sends an IAM request message to the new MSC/VLR.
  • Step 722 The new MSC/VLR sends a location update acceptance response to the user terminal, and completes the attachment of the user in the MSC/VLR.
  • Step 723 The user terminal completes the TMSI allocation.
  • Step 724 The new MSC/VLR initiates a call setup request, requesting to establish a call;
  • Step 725 The mobile phone completes the call confirmation and completes the establishment of the call.
  • the MTRF Supported And Authorized flag and the new MSC/VLR numbers are carried in the cancel location sent by the MSC/VLR.
  • the FLR determines that the MTRF is not in compliance with the MTRF issuance policy, and the carry address sent to the MSC/VLR carries the MTRF Supported And Not Authorized flag and the new MSC/VLR number.
  • modules or steps of the present invention described above can be implemented by a general-purpose computing device that can be centralized on a single computing device or distributed across multiple computing devices.
  • they may be implemented by program code executable by the computing device such that they may be stored in the storage device by the computing device and, in some cases, may be different from this
  • the steps shown or described are performed sequentially, or they are separately fabricated into individual integrated circuit modules, or a plurality of modules or steps thereof are fabricated into a single integrated circuit module.
  • the invention is not limited to any specific combination of hardware and software.
  • a route query request of a home location register HLRe is received by using an international roaming gateway, where the route query request is a location initiated by the called multimode terminal in an international roaming state to the HLRe.
  • the international roaming gateway queries the multi-mode terminal voice fallback network according to the route query request whether the old and new mobile switching center/visiting location register MSC/VLR supports the mobile terminal roaming retry MTRR; the multimode terminal falls back to 2G If the /3G network and the MSC/VLR support the MTRR, the international roaming gateway queries whether the location update process ends; and if the international roaming gateway receives the detection location update process, the roaming number is initiated to the newly registered MSC/VLR.
  • the requesting PRN solves the problem that the connection rate of the voice fallback in the international roaming process of the terminal across the network is not high, and the connection error is easy to occur, the connection rate of the voice fallback is improved, and the wrong connection is reduced.

Abstract

本发明提供了一种语音回落的方法、装置及系统，该方法包括：国际漫游网关根据该路由查询请求查询多模终端语音回落网络新旧移动交换中心/拜访位置寄存器MSC/VLR是否支持移动终端漫游重试MTRR；在该多模终端回落到2G/3G网络和该MSC/VLR支持MTRR情况下，该国际漫游网关查询位置更新流程是否结束；在该国际漫游网关收到检测位置更新流程结束的情况下，向新注册的MSC/VLR发起请求漫游号码请求PRN，解决了终端跨网络国际漫游过程中语音回落的接通率不高，容易出现连接错误的问题，提高了语音回落的接通率，减少了错误连接。

Description

语音回落的方法、装置及系统 技术领域
本发明涉及通信领域，具体而言，涉及一种语音回落的方法、装置及系统。
背景技术
码分多址(Code Division Multiple Access，简称为CDMA)技术是第三代移动通信系统中的一种重要的技术标准。目前在北美、中国以及亚洲一些国家都建立了CDMA商用网络。
由于CDMA网络在全球的规模比全球移动通信系统/通用移动通信系统(System for Mobile Communication/Universal Mobile Telecommunications System,简称为GSM/UMTS)网络规模要小的多，当CDMA用户移动到国外时，如没有CDMA网络覆盖，因此就无法实现国际漫游业务。为了满足用户的国际漫游需求，CDMA网络运营商通常通过部署国际漫游网关(Foreign Location Register，简称为FLR)，由FLR实现ANSI-41MAP(American National Standards Institute-41Mobile Application Part)和GSM MAP的协议间转换，提供CDMA双模(也可以是多模)终端用户在GSM网络和CDMA网络之间漫游的功能。在双模终端用户的业务过程中，FLR担当了GSM网络的移动交换中心/漫游位置寄存器(mobile switching center/visitor location register，简称MSC/VLR)、短消息中心(Short Message Center，简称为SMC)和归属位置寄存器(Home Location Register，简称为HLR)网元角色，以及CDMA网络的MSC/VLR、信息中心(Message Center，简称为MC)和HLR网元角色的方式实现用户到GSM/UMTS下的漫游。
演进到第四代无线数据网络(Long Term Evolution，简称为LTE)对运营商来说是大势所趋，当前已经有多个国家部署了LTE网络。使用具有LTE能力双模终端的CDMA用户在国际漫游时，在LTE网络覆盖区域，会附着在LTE网络上。因此，用户漫游在LTE网络时，如何使用语音业务的问题就应用而生。
CDMA运营商在开展国际漫游业务时，语音业务一般由传统的2G/3G网络提供。因此，要求FLR能够支持标准的电路域回落(Circuit Switched Fallback，简称为CSFB)的移动终端漫游重试(Mobile Terminating Roaming Retry，简称为MTRR)和移动终端漫游转发(Mobile Terminating Roaming Forwarding，简称MTRF)。
通过CSFB技术将具备CSFB能力的LTE终端回落到2G/3G网络，由传统的2G/3G网络提供语音业务，但是，这种语音回落的接通率不高，容易出现连接错误。
针对相关技术中，终端跨网络国际漫游过程中语音回落的接通率不高，容易出现连接错误的问题，目前还没有有效的解决方法。
发明内容
本发明提供了一种语音回落的方法、装置及系统，以至少解决相关技术中终端跨网络国际漫游过程中语音回落的接通率不高，容易出现连接错误的问题。
根据本发明的一个实施例，提供了一种语音回落的方法，包括：国际漫游网关接收归属位置寄存器HLRe的路由查询请求，其中，所述路由查询请求是由处于国际漫游状态的被叫多模终端向所述HLRe发起的位置查询请求引起的；所述国际漫游网关根据所述路由查询请求查询所述多模终端语音回落网络新旧移动交换中心/拜访位置寄存器MSC/VLR是否支持移动终端漫游重试MTRR；在所述多模终端回落到2G/3G网络和所述MSC/VLR支持MTRR情况下，所述国际漫游网关查询位置更新流程是否结束；在所述国际漫游网关收到检测位置更新流程结束的情况下，向新注册的MSC/VLR发起漫游号码请求PRN。
在本实施例中，在所述国际漫游网关查询位置更新流程是否结束之后，在所述国际漫游网关收到检测位置更新流程结束的情况下，向新注册的MSC/VLR发起漫游号码请求PRN之前，还包括：在所述国际漫游网关收到检测位置更新流程没有结束的情况下，等待所述位置更新流程结束。
在本实施例中，所述国际漫游网关查询位置更新流程是否结束包括：所述国际漫游网关收到所处网络MSC发送来的发送路由信息请求，检测所述多模终端所述新MSC/VLR的位置更新是否结束。
在本实施例中，该方法还包括：在所述PRN中携带接收漫游重试支持参数的情况下，所述国际漫游网关向网关移动交换中心GMSC的请求路由信息SRI响应携带漫游重试标志；在所述PRN透传的情况下，所述国际漫游网关向网关移动交换中心GMSC的请求路由信息SRI响应携带呼叫参考号码。
根据本发明的另一个实施例，还提供了一种语音回落的方法，包括：国际漫游网关接收HLRe的路由查询请求，其中，所述路由查询请求是由处于国际漫游状态的被叫多模终端向所述HLRe发起的位置查询请求引起的；所述国际漫游网关根据所述路 由查询请求查询所述多模终端语音回落网络新旧MSC/VLR是否支持移动终端漫游转发MTRF；所述多模终端回落到2G/3G网络和在所述MSC/VLR支持MTRF情况下，所述国际漫游网关向旧MSC/VLR发起取消位置请求；其中，所述取消位置请求中携带MTRF支持和授权标志和新MSC/VLR号码。
在本实施例中，所述国际漫游网关根据所述路由查询请求查询所述多模终端语音回落网络新旧MSC/VLR是否支持移动终端漫游转发MTRF之后，还包括：在所述多模终端回落到2G/3G网络和所述MSC/VLR不支持MTRF情况下，所述国际漫游网关向旧MSC/VLR发起取消位置请求；其中，所述取消位置请求中携带MTRF支持和不授权标志和新MSC/VLR号码。
根据本发明的另一个实施例，还提供了一种语音回落的装置，位于国际漫游网关，包括：第一接收模块，设置为接收归属位置寄存器HLRe的路由查询请求，其中，所述路由查询请求是由处于国际漫游状态的被叫多模终端向所述HLRe发起的位置查询请求引起的；第一支持模块，设置为根据所述路由查询请求查询所述多模终端语音回落网络新旧移动交换中心/拜访位置寄存器MSC/VLR是否支持移动终端漫游重试MTRR；查询模块，设置为在所述多模终端回落到2G/3G网络和所述MSC/VLR支持MTRR情况下，查询位置更新流程是否结束；请求模块，设置为在所述国际漫游网关收到检测位置更新流程结束的情况下，向新注册的MSC/VLR发起漫游号码请求PRN。
在本实施例中，所述装置还包括：等待模块，设置为在所述国际漫游网关收到检测位置更新流程没有结束的情况下，等待所述位置更新流程结束。
在本实施例中，所述支持模块还设置为在收到所处网络MSC发送来的发送路由信息请求，检测所述多模终端所述新MSC/VLR的位置更新是否结束。
根据本发明的另一个实施例，还提供了一种语音回落的装置，位于国际漫游网关，包括：第二接收模块，设置为接收HLRe的路由查询请求，其中，所述路由查询请求是由处于国际漫游状态的被叫多模终端向所述HLRe发起的位置查询请求引起的；第二支持模块，设置为根据所述路由查询请求查询所述多模终端语音回落网络新旧MSC/VLR是否支持移动终端漫游转发MTRF；取消模块，设置为所述多模终端回落到2G/3G网络和在所述MSC/VLR支持MTRF情况下，向旧MSC/VLR发起取消位置请求；其中，所述取消位置请求中携带MTRF支持和授权标志和新MSC/VLR号码。
在本实施例中，包括：所述取消模块还设置为在所述多模终端回落到2G/3G网络和所述MSC/VLR不支持MTRF情况下，向旧MSC/VLR发起取消位置请求；其中，所述取消位置请求中携带MTRF支持和不授权标志和新MSC/VLR号码。
根据本发明的另一个实施例，还提供了一种语音回落的系统，包括：国际漫游网关，所述国际漫游网关包括，上述的语音回落装置。
通过本发明，采用国际漫游网关接收归属位置寄存器HLRe的路由查询请求，其中，该路由查询请求是由处于国际漫游状态的被叫多模终端向该HLRe发起的位置查询请求引起的；该国际漫游网关根据该路由查询请求查询该多模终端语音回落网络新旧移动交换中心/拜访位置寄存器MSC/VLR是否支持移动终端漫游重试MTRR；在该多模终端回落到2G/3G网络和该MSC/VLR支持MTRR情况下，该国际漫游网关查询位置更新流程是否结束；在该国际漫游网关收到检测位置更新流程结束的情况下，向新注册的MSC/VLR发起漫游号码请求PRN解决了相关技术中终端跨网络国际漫游过程中语音回落的接通率不高，容易出现连接错误的问题，提高了语音回落的接通率，减少了错误连接。
附图说明
此处所说明的附图用来提供对本发明的进一步理解，构成本申请的一部分，本发明的示意性实施例及其说明用于解释本发明，并不构成对本发明的不当限定。在附图中：
图1是根据本发明实施例的语音回落的方法的流程图一；
图2是根据本发明实施例的语音回落的方法的流程图二；
图3是根据本发明实施例的语音回落的装置结构框图一；
图4是根据本发明实施例的语音回落的装置结构框图二；
图5是根据本发明优选实施例的语音回落已经成功取回漫游号码后的MTRR的第一实施例的流程图；
图6是根据本发明优选实施例的语音回落已经成功取回漫游号码后的MTRR的第二实施例的流程图；
图7是根据本发明优选实施例的语音回落已经语音回落重新选择MSC的MTRF的第三实施例的流程图。
具体实施方式
下文中将参考附图并结合实施例来详细说明本发明。需要说明的是，在不冲突的情况下，本申请中的实施例及实施例中的特征可以相互组合。
在本实施例中提供了一种语音回落的方法，图1是根据本发明实施例的语音回落的方法的流程图一，如图1所示，该流程包括如下步骤：
步骤S102，国际漫游网关接收归属位置寄存器HLRe的路由查询请求，其中，该路由查询请求是由处于国际漫游状态的被叫多模终端向该HLRe发起的位置查询请求引起的；
步骤S104，国际漫游网关根据路由查询请求查询多模终端语音回落网络新旧移动交换中心/拜访位置寄存器MSC/VLR是否支持移动终端漫游重试MTRR；
步骤S106，在多模终端回落到2G/3G网络和MSC/VLR支持MTRR情况下，国际漫游网关查询位置更新流程是否结束；
步骤S108，在国际漫游网关收到检测位置更新流程结束的情况下，向新注册的MSC/VLR发起漫游号码请求PRN。
通过上述步骤，国际漫游网关根据路由查询请求查询多模终端语音回落网络新旧移MSC/VLR是否支持MTRR；在该多模终端回落到2G/3G网络和该MSC/VLR支持MTRR情况下，该国际漫游网关查询位置更新流程是否结束；在该国际漫游网关收到检测位置更新流程结束的情况下，向新注册的MSC/VLR发起PRN，解决了终端跨网络国际漫游过程中语音回落的接通率不高，容易出现连接错误的问题，提高了语音回落的接通率，减少了错误连接。
在本实施例中，在该国际漫游网关收到检测位置更新流程没有结束的情况下，等待该位置更新流程结束，直到在该国际漫游网关收到检测位置更新流程结束的情况下，向新注册的MSC/VLR发起漫游号码请求PRN
在本实施例中，该国际漫游网关查询位置更新流程是否结束可以包括：该国际漫游网关收到所处网络MSC发送来的发送路由信息请求，检测该多模终端该新MSC/VLR的位置更新是否结束。
在本实施例中，在该PRN中携带接收漫游重试支持参数的情况下，该国际漫游网关向网关移动交换中心GMSC的请求路由信息SRI响应携带漫游重试标志；还可以在 该PRN透传的情况下，该国际漫游网关向网关移动交换中心GMSC的请求路由信息SRI响应携带呼叫参考号码。
在本实施例中提供了一种语音回落的方法，图2是根据本发明实施例的语音回落的方法的流程图二，如图2所示，该流程包括如下步骤：
步骤S202，国际漫游网关接收HLRe的路由查询请求，其中，该路由查询请求是由处于国际漫游状态的被叫多模终端向该HLRe发起的位置查询请求引起的；
步骤S204，国际漫游网关根据路由查询请求查询多模终端语音回落网络新旧MSC/VLR是否支持移动终端漫游转发MTRF；
步骤S206，该多模终端回落到2G/3G网络和在该MSC/VLR支持MTRF情况下，该国际漫游网关向旧MSC/VLR发起取消位置请求；其中，该取消位置请求中携带MTRF支持和授权标志和新MSC/VLR号码。
通过上述步骤，该国际漫游网关根据该路由查询请求查询该多模终端语音回落网络新旧MSC/VLR是否支持移动终端漫游转发MTRF，该多模终端回落到2G/3G网络和在该MSC/VLR支持MTRF情况下，该国际漫游网关向旧MSC/VLR发起取消位置请求；其中，该取消位置请求中携带MTRF支持和授权标志和新MSC/VLR号码。通过上述方法解决了终端跨网络国际漫游过程中语音回落的接通率不高，容易出现连接错误的问题，提高了语音回落的接通率，减少了错误连接。
在本实施例中，该国际漫游网关根据该路由查询请求查询该多模终端语音回落网络新旧MSC/VLR是否支持移动终端漫游转发MTRF之后，还包括：在该多模终端回落到2G/3G网络和该MSC/VLR不支持MTRF情况下，该国际漫游网关向旧MSC/VLR发起取消位置请求；其中，该取消位置请求中携带MTRF支持和不授权标志和新MSC/VLR号码。
在本实施例中，还提供了一种语音回落的装置，该装置用于实现上述实施例及优选实施方式，已经进行过说明的不再赘述。如以下所使用的，术语“模块”可以实现预定功能的软件和/或硬件的组合。尽管以下实施例所描述的装置较佳地以软件来实现，但是硬件，或者软件和硬件的组合的实现也是可能并被构想的。
图3是根据本发明实施例的语音回落的装置结构框图一，如图3所示，该装置位于国际漫游网关，包括第一接收模块32、第一支持模块34、查询模块36和请求模块38，下面对该装置进行说明。
第一接收模块32，设置为接收归属位置寄存器HLRe的路由查询请求，其中，该路由查询请求是由处于国际漫游状态的被叫多模终端向该HLRe发起的位置查询请求引起的；
第一支持模块34，设置为根据该路由查询请求查询该多模终端语音回落网络新旧移动交换中心/拜访位置寄存器MSC/VLR是否支持移动终端漫游重试MTRR；
查询模块36，设置为在该多模终端回落到2G/3G网络和该MSC/VLR支持MTRR情况下，查询位置更新流程是否结束；
请求模块38，设置为在该国际漫游网关收到检测位置更新流程结束的情况下，向新注册的MSC/VLR发起漫游号码请求PRN。
通过上述装置，国际漫游网关根据路由查询请求查询多模终端语音回落网络新旧移MSC/VLR是否支持MTRR；在该多模终端回落到2G/3G网络和该MSC/VLR支持MTRR情况下，该国际漫游网关查询位置更新流程是否结束；在该国际漫游网关收到检测位置更新流程结束的情况下，向新注册的MSC/VLR发起PRN，解决了终端跨网络国际漫游过程中语音回落的接通率不高，容易出现连接错误的问题，提高了语音回落的接通率，减少了错误连接。
在本实施例中，该装置还包括：等待模块，设置为在该国际漫游网关收到检测位置更新流程没有结束的情况下，等待该位置更新流程结束。
在本实施例中，所述支持模块还设置为在收到所处网络MSC发送来的发送路由信息请求，检测该多模终端该新MSC/VLR的位置更新是否结束。
图4是根据本发明实施例的语音回落的装置结构框图二，如图4所示，该装置位于国际漫游网关，包括第二接收模块42、第二支持模块44和取消模块46，下面对该装置进行说明。
第二接收模块42，设置为接收HLRe的路由查询请求，其中，该路由查询请求是由处于国际漫游状态的被叫多模终端向该HLRe发起的位置查询请求引起的；
第二支持模块44，设置为根据该路由查询请求查询该多模终端语音回落网络新旧MSC/VLR是否支持移动终端漫游转发MTRF；
取消模块46，设置为该多模终端回落到2G/3G网络和在该MSC/VLR支持MTRF情况下，向旧MSC/VLR发起取消位置请求；其中，该取消位置请求中携带MTRF支持和授权标志和新MSC/VLR号码。
通过上述装置，该国际漫游网关根据该路由查询请求查询该多模终端语音回落网络新旧MSC/VLR是否支持移动终端漫游转发MTRF，该多模终端回落到2G/3G网络和在该MSC/VLR支持MTRF情况下，该国际漫游网关向旧MSC/VLR发起取消位置请求；其中，该取消位置请求中携带MTRF支持和授权标志和新MSC/VLR号码。通过上述方法解决了终端跨网络国际漫游过程中语音回落的接通率不高，容易出现连接错误的问题，提高了语音回落的接通率，减少了错误连接。
该取消模块46还设置为在该多模终端回落到2G/3G网络和该MSC/VLR不支持MTRF情况下，向旧MSC/VLR发起取消位置请求；其中，该取消位置请求中携带MTRF支持和不授权标志和新MSC/VLR号码。
在上述实施例中，还包括一种语音回落的系统，该系统包括上述的国际漫游网关，该国际漫游网关包括，上述语音回落装置。
下面结合优先实施例和实施方式来对本发明进行说明。
本优选实施例提供了一种实现CDMA用户国际漫游在LTE网络时语音回落的方法,该方法适设置为CDMA双模(也可以是多模)用户信息存放在CDMA归属位置寄存器(home location register emulation，简称为HLRe)，CDMA用户国际漫游对应的GSM/UMTS信息保存在国际漫游网关FLR中。
所述的CDMA用户国际漫游在LTE网络时语音回落的方法中,当用户国际漫游在LTE网络且所在的MSC/VLR允许MTRR时，当用户在CDMA网络中做被叫时，FLR扮演CDMA MSC/VLR角色，向HLRe返回路由响应，路由响应的临时本地号码(Temporary Local Directory Number，简称为TLDN)中携带重定向标签(RedirectNum)。
当用户CSFB回落到2G/3G网络并在GSM/UMTS网络中重新选择MSC/VLR注册时，FLR扮演GSM/UMTS网络中的HLR角色。当新旧MSC/VLR都允许MTRR时，FLR记录位置更新的标示，直到位置更新流程结束，当此过程中收到GSM/UMTS的MSC发送来的SEND_ROUTING_INFORMATION(发送路由信息)请求时，检测当前用户在新MSC/VLR的位置更新是否结束，如位置更新流程未结束，则等待位置更新流程结束以后，再向新的MSC/VLR发送提供漫游号码(Provide Roaming Number，简称为PRN)请求，如果请求路由信息(Sending Routing Information，简称 为SRI)，请求携带了漫游重试标志(Roaming Retry)，则在PRN提供漫游号码。请求消息中携带接收漫游重试支持(mt RoamingRetrySupported)参数。
当用户CSFB回落到2G/3G网络并在GSM/UMTS网络中重新选择MSC/VLR注册时，FLR扮演GSM/UMTS网络中的HLR角色。当新旧MSC/VLR都允许MTRF,并且位置更新位置更新(UPDATE_LOCATION)携带了MTRF标志时,FLR向用户之前登记的MSC/VLR发送删除位置(CANCEL_LOCATION)消息中携带支持和授权标志(MTRFmtrf-SupportedAndAuthorized)、新MSC/VLR号码(newMSC-Number,newVLR-Number)。
图5是根据本发明优选实施例的语音回落已经成功取回漫游号码后的MTRR的第一实施例的流程图，如图5所示，在本发明所述的当用户注册在LTE网络时，如用户做被叫业务，触发CSFB已经取回漫游号码后实现MTRR的第一实施例中，本优选实施例提供了FLR和其他网元实体之间交互的方法，其包括如下步骤：
步骤501：CDMA网关移动交换中心(Gateway Mobile Switching Center，简称为GMSC)收到用户的起呼请求，向被叫用户所在的HLRe发起位置查询请求；
步骤502：HLRe根据记录的用户位置，向FLR发起路由查询；
步骤503：本发明要求FLR判断当前用户如果处于国际漫游状态且用户所在的MSC/VLR允许MTRR时，则向HLRe返回路由信息，格式为路由码和移动用户号码簿号码(router code+Mobile Directory Number，简称为RN+MDN)，其中RN为GSM/UMTS的GMSC的路由码。
步骤504：HLRe收到FLR返回的路由码后，向CDMA GMSC返回路由码；
步骤505：CDMA GMSC根据HLRe返回的路由信息，将呼叫重定向到GSM/UMTS的GMSC上。
步骤506：GMSC根据路由配置向FLR发起路由查询，请求中携带MT Roaming Retry Supported标示；
步骤507：FLR充当HLR的角色，向用户所在的MSC/VLR发送PRN，请求漫游号码；
步骤508：MSC/VLR收到漫游号码请求后，返回漫游号码；
步骤509：FLR通过SRI响应，向GMSC返回漫游号码；
步骤510：GMSC根据漫游号码，向用户所在的MSC/VLR发起初始地址信息(Initial address message，简称为IMA)；
步骤511：MSC/VLR通过SGs接口，向移动管理实体(Mobile Managenment Entity,简称为MME)寻呼用户，并触发用户由LTE回落到2/3G网络；
步骤512：用户回落到2/3G网络后，重新选择MSC/VLR进行位置登记，并且选择的MSC/VLR与当前登记的MSC/VLR不同；
步骤513：新的MSC/VLR向FLR发起位置更新请求；
步骤514：FLR收到新MSC/VLR的位置更新请求后，向之前登记的MSC/VLR发送取消位置(cancel location)，请求删除用户信息；
步骤515：旧MSC/VLR向FLR返回的cancel location响应；
步骤516：FLR模拟MSC/VLR向CDMA的HLRe发起位置更新请求；
步骤517：HLRe完成用户位置信息更新后，向FLR返回位置更新的响应；
步骤518：旧MSC/VLR向GMSC发送回复呼叫处理(Resume Call Handling,以下简称:RCH)指示用户已经发送漫游重试(Roamingretry)，GMSC确认消息返回应答。
步骤519：GMSC向旧MSC/VLR发送REL(Release)，Release释放和旧MSC/VLR之间的话路资源。
步骤520：FLR模拟HLR，向新MSC/VLR下插用户数据；
步骤521：GMSC重新向FLR发起路由请求；
步骤522：FLR继续向MSC/VLR下插数据；
步骤523：FLR完成数据下插后，向MSC/VLR发送位置更新响应，完成位置更新流程；
步骤524：本发明要求FLR等待位置更新流程结束，FLR检测位置更新流程已经结束后，则向新MSC/VLR请求漫游号码；
步骤525：新MSC/VLR向FLR返回漫游号码；
步骤526：FLR向GMSC返回请求路由信息(Sending Routing Information,简称为SRI)MAP请求路由信息响应，携带漫游号码。
步骤527：GMSC根据漫游号码，向用户所在的MSC/VLR发送IAM请求；
步骤528：新MSC/VLR向用户终端发送位置更新接受应答，完成用户在MSC/VLR的附着；
步骤529：用户终端完成临时识别码(Temporary Mobile Subscriber Identity，简称为TMSI)；
步骤530：新MSC/VLR发起呼叫建立请求，要求发起呼叫；
步骤531：手机完成呼叫确认，完成呼叫的建立。
上述的第一实施例的步骤507时，有如下的说明：
可选说明一，上述步骤507中，如果SRI请求携带了呼叫参考号码(Call Reference Number)则PRN需要透传。
可选说明二，上述步骤507中，如果SRI请求携带了漫游重试(Roaming Retry)标志，则在PRN请求消息中携带接收漫游重试支持参数(mtRoamingRetrySupported)。
本实施例中所述的第一实施例的步骤524时，有如下的说明：
可选的说明一，上述步骤524中，FLR检测当前是否有未结束的位置更新流程，如果存在未结束的位置更新流程则等待位置更新流程结束以后再发起PRN请求。
实施所述的第一实施例的步骤516和步骤517，跟步骤518和步骤519、没有先后顺序关系。
图6是根据本发明优选实施例的语音回落已经成功取回漫游号码后的MTRR的第二实施例的流程图，如图6所示，在本发明所述的当用户注册在LTE网络时，如用户做被叫业务，触发CSFB在获取漫游号码过程中实现MTRR的第二实施例中，本发明提供了FLR和其他网元实体之间交互的方法，其包括如下步骤：
步骤601：CDMA GMSC收到用户的起呼请求，向被叫用户所在的HLRe发起位置查询请求；
步骤602：HLRe根据记录的用户位置，向FLR发起路由查询
步骤603：本发明要求FLR判断当前用户如果处于国际漫游状态且用户所在的MSC/VLR允许MTRR时，则向HLRe返回路由信息，格式为RN+MDN，其中RN为GSM/UMTS GMSC的路由码。
步骤604：HLRe收到FLR返回的路由码后，向CDMA GMSC返回路由码；
步骤605：CDMA GMSC根据HLRe返回的路由信息，将呼叫重定向到GSM/UMTS的GMSC上。
步骤606：GMSC根据路由配置向FLR发起路由查询，请求中携带MT Roaming Retry Supported标示；
步骤607：FLR充当HLR的角色，向用户所在的MSC/VLR发送PRN，请求漫游号码；
步骤608：MSC/VLR收到漫游号码请求后，发起预寻呼触发用户由LTE回落到2/3G网络；
步骤609：用户回落到2/3G网络后，重新选择MSC/VLR进行位置登记，并且选择的MSC/VLR与当前登记的MSC/VLR不同；
步骤610：新MSC/VLR与旧MSC/VLR通过Identification消息交换是否有进行中的呼叫；
步骤611：新的MSC/VLR向FLR发起位置更新请求；
步骤612：FLR收到新MSC/VLR的位置更新请求后，向之前登记的MSC/VLR发送cancel location，请求删除用户信息；
步骤613：旧MSC/VLR向FLR返回的cancel location响应；
步骤614：FLR模拟MSC/VLR向CDMA的HLRe发起位置更新请求；
步骤615：HLRe完成用户位置信息更新后，向FLR返回位置更新的响应；
步骤616：FLR模拟HLR，向新MSC/VLR下插用户数据；
步骤617：旧MSC/VLR向FLR返回PRN响应，携带缺席用户错误指示和错误原因为：MTRR；
步骤618：FLR向GMSC返回SRI应答，携带缺席用户的错误指示和错误原因为MTRR；
步骤619：GMSC向FLR发起第二次SRI请求；
步骤620：FLR继续向MSC/VLR下插数据；
步骤621：FLR完成数据下插后，向MSC/VLR发送位置更新响应，完成位置更新流程；
步骤622：本发明要求FLR等待位置更新流程结束，FLR检测位置更新流程已经结束后，则向新MSC/VLR请求漫游号码；
步骤623：新MSC/VLR向FLR返回漫游号码；
步骤624：FLR向GMSC返回SRI响应，携带漫游号码。
步骤625：GMSC根据漫游号码，向用户所在的MSC/VLR发送IAM请求；
步骤626：新MSC/VLR向用户终端发送位置更新接受应答，完成用户在MSC/VLR的附着；
步骤627：用户终端完成TMSI分配；
步骤628：新MSC/VLR发起呼叫建立请求，要求发起呼叫；
步骤629：手机完成呼叫确认，完成呼叫的建立。
上述第一实施例的步骤607时，有如下的说明：
可选说明一，上述步骤607中，如果SRI请求携带了Call Reference Number则PRN需要透传。
可选说明二，上述步骤607中，如果SRI请求携带了Roaming Retry标志，则在PRN请求消息中携带mtRoamingRetrySupported参数。
实施所述的第二实施例的步骤622时，有如下的说明：
可选的说明一，上述步骤622中，FLR检测当前是否有未结束的位置更新流程，如果存在未结束的位置更新流程则等待位置更新流程结束以后再发起PRN请求。
实施所述的第二实施例的步骤614和步骤615，跟步骤616和步骤617没有先后顺序关系。
图7是根据本发明优选实施例的语音回落已经语音回落重新选择MSC的MTRF的第三实施例的流程图，如图7所示，本发明所述的当用户在LTE网络，做被叫业务触发语音回落重新选择MSC的MTRF过程的实施例，包括以下步骤：
步骤701：CDMA GMSC收到用户的起呼请求，向被叫用户所在的HLRe发起位置查询请求；
步骤702：HLRe根据记录的用户位置，向FLR发起路由查询
步骤703：FLR充当HLR角色，向用户所在的MSC/VLR发送PRN，请求漫游号码。
步骤704：MSC/VLR收到漫游号码请求后，返回漫游号码；
步骤705：FLR收到MSC/VLR返回的路由号码，通过路由请求(routereq)响应消息向HLRe返回TLDN号码；
步骤706：HLRe向CDMA GMSC返回位置查询响应；
步骤707：CDMA GMSC根据位置查询的结果，向被叫所在的MSC/VLR发送IAM消息；
步骤708：MSC/VLR通过SGs接口，向MME寻呼用户，并触发用户由LTE回落到2/3G网络；
步骤709：用户回落到2/3G网络后，重新选择MSC/VLR进行位置登记，并且选择的MSC/VLR与当前的MSC/VLR不同；
步骤710：新的MSC/VLR向旧MSC/VLR发送Send Identification，携带支持MTRF的标示和新MSC/VLR号码；
步骤711：新MSC/VLR向FLR发起位置更新请求，请求中携带支持MTRF的标示；
步骤712：FLR收到新MSC/VLR的位置更新请求后，向之前登记的MSC/VLR发送cancel location，本发明特别要求请求中携带MTRF指示和新MSC/VLR号码；
步骤713：旧MSC/VLR向FLR返回的cancel location响应，并停止寻呼用户；
步骤714：FLR模拟MSC/VLR向CDMA的HLRe发起位置更新请求；
步骤715：HLRe完成用户位置信息更新后，向FLR返回位置更新的响应；
步骤716：FLR模拟HLR，向新MSC/VLR下插用户数据；
步骤717：旧MSC/VLR向新的MSC/VLR发起PRN请求，请求中携带MTRF指示和旧MSC/VLR号码；
步骤718：FLR继续向MSC/VLR下插数据。
步骤719：FLR完成数据下插后，向MSC/VLR发送位置更新响应，完成位置更新流程；
步骤720：新MSC/VLR向旧MSC/VLR返回PRN应答，携带路由号码；
步骤721：旧MSC/VLR向新MSC/VLR发送IAM请求消息；
步骤722：新MSC/VLR向用户终端发送位置更新接受应答，完成用户在MSC/VLR的附着；
步骤723：用户终端完成TMSI分配；
步骤724：新MSC/VLR发起呼叫建立请求，要求建立呼叫；
步骤725：手机完成呼叫确认，完成呼叫的建立。
上述实施例的步骤712时，有如下的说明：
可选说明一，上述步骤712中，FLR判断符合MTRF发放策略，则向MSC/VLR中发送的cancel location中携带MTRF Supported And Authorized flag and the new MSC/VLR numbers。
可选说明二，上述步骤712中，FLR判断不符合MTRF发放策略，则向MSC/VLR中发送的cancel location中携带MTRF Supported And not Authorized标志和新MSC/VLR号码。
显然，本领域的技术人员应该明白，上述的本发明的各模块或各步骤可以用通用的计算装置来实现，它们可以集中在单个的计算装置上，或者分布在多个计算装置所 组成的网络上，可选地，它们可以用计算装置可执行的程序代码来实现，从而，可以将它们存储在存储装置中由计算装置来执行，并且在某些情况下，可以以不同于此处的顺序执行所示出或描述的步骤，或者将它们分别制作成各个集成电路模块，或者将它们中的多个模块或步骤制作成单个集成电路模块来实现。这样，本发明不限制于任何特定的硬件和软件结合。
以上所述仅为本发明的优选实施例而已，并不用于限制本发明，对于本领域的技术人员来说，本发明可以有各种更改和变化。凡在本发明的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本发明的保护范围之内。
工业实用性
基于本发明实施例提供的上述技术方案，通过采用国际漫游网关接收归属位置寄存器HLRe的路由查询请求，其中，该路由查询请求是由处于国际漫游状态的被叫多模终端向该HLRe发起的位置查询请求引起的；该国际漫游网关根据该路由查询请求查询该多模终端语音回落网络新旧移动交换中心/拜访位置寄存器MSC/VLR是否支持移动终端漫游重试MTRR；在该多模终端回落到2G/3G网络和该MSC/VLR支持MTRR情况下，该国际漫游网关查询位置更新流程是否结束；在该国际漫游网关收到检测位置更新流程结束的情况下，向新注册的MSC/VLR发起漫游号码请求PRN解决了相关技术中终端跨网络国际漫游过程中语音回落的接通率不高，容易出现连接错误的问题，提高了语音回落的接通率，减少了错误连接。

Claims (12)

  1. 一种语音回落的方法，包括：
    国际漫游网关接收归属位置寄存器HLRe的路由查询请求，其中，所述路由查询请求是由处于国际漫游状态的被叫多模终端向所述HLRe发起的位置查询请求引起的；
    所述国际漫游网关根据所述路由查询请求查询所述多模终端语音回落网络新旧移动交换中心/拜访位置寄存器MSC/VLR是否支持移动终端漫游重试MTRR；
    在所述多模终端回落到2G/3G网络和所述MSC/VLR支持MTRR情况下，所述国际漫游网关查询位置更新流程是否结束；
    在所述国际漫游网关收到检测位置更新流程结束的情况下，向新注册的MSC/VLR发起漫游号码请求PRN。
  2. 根据权利要求1所述的方法，其中，在所述国际漫游网关查询位置更新流程是否结束之后，在所述国际漫游网关收到检测位置更新流程结束的情况下，向新注册的MSC/VLR发起漫游号码请求PRN之前，还包括：
    在所述国际漫游网关收到检测位置更新流程没有结束的情况下，等待所述位置更新流程结束。
  3. 根据权利要求1所述的方法，其中，所述国际漫游网关查询位置更新流程是否结束包括：
    所述国际漫游网关收到所处网络MSC发送来的发送路由信息请求，检测所述多模终端所述新MSC/VLR的位置更新是否结束。
  4. 根据权利要求1所述的方法，其中，该方法还包括：
    在所述PRN中携带接收漫游重试支持参数的情况下，所述国际漫游网关向网关移动交换中心GMSC的请求路由信息SRI响应携带漫游重试标志；
    在所述PRN透传的情况下，所述国际漫游网关向网关移动交换中心GMSC的请求路由信息SRI响应携带呼叫参考号码。
  5. 一种语音回落的方法，包括：
    国际漫游网关接收HLRe的路由查询请求，其中，所述路由查询请求是由处于国际漫游状态的被叫多模终端向所述HLRe发起的位置查询请求引起的；
    所述国际漫游网关根据所述路由查询请求查询所述多模终端语音回落网络新旧MSC/VLR是否支持移动终端漫游转发MTRF；
    所述多模终端回落到2G/3G网络和在所述MSC/VLR支持MTRF情况下，所述国际漫游网关向旧MSC/VLR发起取消位置请求；其中，所述取消位置请求中携带MTRF支持和授权标志和新MSC/VLR号码。
  6. 根据权利要求5所述的方法，其中，所述国际漫游网关根据所述路由查询请求查询所述多模终端语音回落网络新旧MSC/VLR是否支持移动终端漫游转发MTRF之后，还包括：
    在所述多模终端回落到2G/3G网络和所述MSC/VLR不支持MTRF情况下，所述国际漫游网关向旧MSC/VLR发起取消位置请求；其中，所述取消位置请求中携带MTRF支持和不授权标志和新MSC/VLR号码。
  7. 一种语音回落的装置，位于国际漫游网关，包括：
    第一接收模块，设置为接收归属位置寄存器HLRe的路由查询请求，其中，所述路由查询请求是由处于国际漫游状态的被叫多模终端向所述HLRe发起的位置查询请求引起的；
    第一支持模块，设置为根据所述路由查询请求查询所述多模终端语音回落网络新旧移动交换中心/拜访位置寄存器MSC/VLR是否支持移动终端漫游重试MTRR；
    查询模块，设置为在所述多模终端回落到2G/3G网络和所述MSC/VLR支持MTRR情况下，查询位置更新流程是否结束；
    请求模块，设置为在所述国际漫游网关收到检测位置更新流程结束的情况下，向新注册的MSC/VLR发起漫游号码请求PRN。
  8. 根据权利要求7所述的装置，其中，所述装置还包括：
    等待模块，设置为在所述国际漫游网关收到检测位置更新流程没有结束的情况下，等待所述位置更新流程结束。
  9. 根据权利要求7所述的装置，其中，所述支持模块还设置为在收到所处网络MSC发送来的发送路由信息请求，检测所述多模终端所述新MSC/VLR的位置更新是否结束。
  10. 一种语音回落的装置，位于国际漫游网关，包括：
    第二接收模块，设置为接收HLRe的路由查询请求，其中，所述路由查询请求是由处于国际漫游状态的被叫多模终端向所述HLRe发起的位置查询请求引起的；
    第二支持模块，设置为根据所述路由查询请求查询所述多模终端语音回落网络新旧MSC/VLR是否支持移动终端漫游转发MTRF；
    取消模块，设置为所述多模终端回落到2G/3G网络和在所述MSC/VLR支持MTRF情况下，向旧MSC/VLR发起取消位置请求；其中，所述取消位置请求中携带MTRF支持和授权标志和新MSC/VLR号码。
  11. 根据权利要求10所述的装置，其中，包括：
    所述取消模块还设置为在所述多模终端回落到2G/3G网络和所述MSC/VLR不支持MTRF情况下，向旧MSC/VLR发起取消位置请求；其中，所述取消位置请求中携带MTRF支持和不授权标志和新MSC/VLR号码。
  12. 一种语音回落的系统，包括：
    国际漫游网关，所述国际漫游网关包括，权利要求7到权利要求11的所述的语音回落装置。
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