WO2015100606A1 - 一种选择lte网络的方法、设备及系统 - Google Patents

一种选择lte网络的方法、设备及系统 Download PDF

Info

Publication number
WO2015100606A1
WO2015100606A1 PCT/CN2013/091081 CN2013091081W WO2015100606A1 WO 2015100606 A1 WO2015100606 A1 WO 2015100606A1 CN 2013091081 W CN2013091081 W CN 2013091081W WO 2015100606 A1 WO2015100606 A1 WO 2015100606A1
Authority
WO
WIPO (PCT)
Prior art keywords
lte network
message
network
plmn
msc
Prior art date
Application number
PCT/CN2013/091081
Other languages
English (en)
French (fr)
Inventor
吴晓波
舒林
邹烨
Original Assignee
华为技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to CN201380002743.6A priority Critical patent/CN105009639A/zh
Priority to PCT/CN2013/091081 priority patent/WO2015100606A1/zh
Publication of WO2015100606A1 publication Critical patent/WO2015100606A1/zh

Links

Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W36/00Hand-off or reselection arrangements
    • H04W36/0005Control or signalling for completing the hand-off
    • H04W36/0011Control or signalling for completing the hand-off for data sessions of end-to-end connection
    • H04W36/0022Control or signalling for completing the hand-off for data sessions of end-to-end connection for transferring data sessions between adjacent core network technologies
    • H04W36/00224Control or signalling for completing the hand-off for data sessions of end-to-end connection for transferring data sessions between adjacent core network technologies between packet switched [PS] and circuit switched [CS] network technologies, e.g. circuit switched fallback [CSFB]

Definitions

  • the present invention relates to the field of communications technologies, and in particular, to a method, device, and system for selecting an LTE network.
  • Second Generation (2G) or Third Generation (3G) networks such as Global System of Mobile communication (GSM) or Wideband Code Division Multiple Access (WCDMA) Basic coverage has been basically achieved.
  • GSM Global System of Mobile communication
  • WCDMA Wideband Code Division Multiple Access
  • LTE Long Term Evolution
  • UE User equipment
  • PS Packet Switching
  • CS Circuit Switching
  • the Circuit Switched Fallback is used by the user equipment (UE) under the LTE coverage to trigger the UE to switch from the LTE network to the CS domain of the 2G or 3G network.
  • CSFB Circuit Switched Fallback
  • UE user equipment
  • a voice service is handled in a network having a CS domain.
  • the registered public land mobile network PLMN of the UE changes from the first PLMN of the LTE network to the second PLMN of the 2G or 3G network.
  • the embodiment of the present invention provides a method for selecting an LTE network.
  • the MSC sends a notification message to the UE, where the notification message carries a location area identifier LAI, the LAI.
  • the PLMN identifier of the LTE network is included, so that the UE returns to the LTE network preferentially according to the identifier of the PLMN.
  • the embodiments of the present invention also provide corresponding devices and systems.
  • a first aspect of the present invention provides a method for selecting an LTE network, including:
  • the mobile switching center MSC receives the first handover request message sent by the mobility management entity MME, where the first handover request message is used to request the MSC to switch the user equipment UE from the long term evolution LTE network to the second generation 2G for the circuit domain fallback CSFB. Or a circuit switched CS domain of a third generation 3G network;
  • the MSC Sending, by the MSC, a notification message to the UE, where the notification message carries a location area identifier LAI, where the LAI includes a PLMN identifier of the LTE network, and the PLMN identifier of the LTE network is used to indicate that the UE is according to the The PLMN identity of the LTE network selects the LTE network to return to.
  • LAI includes a PLMN identifier of the LTE network
  • the PLMN identifier of the LTE network is used to indicate that the UE is according to the The PLMN identity of the LTE network selects the LTE network to return to.
  • the notification message is a TMSI reallocation message.
  • a second aspect of the present invention provides a method for selecting an LTE network, including:
  • the user equipment UE located in the Long Term Evolution (LTE) network sends a request message to the mobility management entity MME, where the request message is used to request the circuit domain to fall back to the CSFB;
  • LTE Long Term Evolution
  • a handover command sent by the eNodeB eNodeB where the handover command is used to indicate that the UE is a circuit switched CS domain that the CSFB switches from the LTE network to a 2G or 3G network;
  • the LAI includes a PLMN identifier of the LTE network
  • the UE selects an LTE network to return to according to the identifier of the PLMN.
  • the method further includes: Receiving, by the UE, a redirect message or an air interface connection release message sent by the base station of the 2G or 3G network, where the redirect message or the air interface connection release message triggers the UE to select an LTE network to be returned according to the identifier of the PLMN .
  • the notification message is a TMSI reallocation message.
  • a third aspect of the present invention provides a mobile switching center MSC, including:
  • a receiving unit configured to receive a first handover request message and a handover complete message sent by the mobility management entity MME, where the first handover request message is used to request the MSC to switch the user equipment UE from the long term evolution LTE network for the circuit domain fallback CSFB To a circuit switched CS domain of a second generation 2G or third generation 3G network, the handover complete message indicating that the UE has completed handover from the LTE network to a CS domain of the 2G or 3G network;
  • a generating unit configured to generate a notification message according to the handover complete message received by the receiving unit, where the notification message carries a location area identifier LAI, where the LAI includes a PLMN identifier of the LTE network, and a PLMN of the LTE network The identifier is used to indicate that the UE selects an LTE network to be returned according to the PLMN identity of the LTE network;
  • a sending unit configured to send the notification message generated by the generating unit.
  • the notification message is a TMSI reallocation message.
  • a fourth aspect of the present invention provides a user equipment UE, including:
  • a sending unit configured to send a request message to the mobility management entity MME, where the request message is used to request the circuit domain to fall back to the CSFB;
  • a receiving unit configured to receive a handover command sent by the evolved base station eNodeB, where the handover command is used to indicate that the UE is a circuit switched CS domain for the CSFB to switch from the LTE network to a 2G or 3G network;
  • a switching unit configured to switch from the LTE network to the CS domain of the 2G or 3G network according to the handover command received by the receiving unit;
  • the receiving unit is further configured to receive a notification message sent by the MSC, where the notification message packet is a location area identifier LAI, where the LAI includes a PLMN identity of the LTE network;
  • a selecting unit configured to select, according to the identifier of the PLMN received by the receiving unit, an LTE network to be returned.
  • the receiving unit is further configured to receive a redirect message or an air interface connection release message sent by the base station of the 2G or 3G network, where the redirect message or the air interface connection release message triggers the selection unit to receive according to the receiving unit.
  • the identity of the PLMN selects the LTE network to return to.
  • the MSC sends a notification message to the UE, where the notification message carries a location area identifier LAI, where the LAI includes a PLMN identifier of the LTE network, so that the The UE returns to the LTE network preferentially according to the identifier of the PLMN.
  • FIG. 1 is a schematic diagram of an embodiment of a method for selecting an LTE network according to an embodiment of the present invention
  • FIG. 2 is a schematic diagram of another embodiment of a method for selecting an LTE network according to an embodiment of the present invention
  • FIG. 3 is a schematic diagram of another embodiment of a method for selecting an LTE network according to an embodiment of the present invention
  • FIG. 5 is a schematic diagram of another embodiment of selecting an LTE network according to an embodiment of the present invention
  • FIG. 6 is a schematic diagram of another embodiment of selecting an LTE network in an embodiment of the present invention.
  • FIG. 7 is a schematic diagram of an embodiment of a mobile switching center according to an embodiment of the present invention.
  • FIG. 8 is a schematic diagram of an embodiment of a user equipment according to an embodiment of the present invention.
  • FIG. 9 is a schematic diagram of an embodiment of a system in an embodiment of the present invention.
  • An embodiment of the present invention provides a method for selecting an LTE network.
  • the MSC sends a notification message to the UE, where the notification message carries a location area identifier LAI, where the LAI includes a PLMN of the LTE network. Identifying, so that the UE returns to the priority according to the identifier of the PLMN The LTE network.
  • the embodiments of the present invention also provide corresponding devices and systems. The details are described below separately.
  • the Chinese and English comparisons and abbreviations of the partial communication nouns in the embodiments of the present invention include: Mobile Management Entity (MME), Envolved NodeB (eNodeB), User Equipment (UE), and Mobile Switching Center. (Mobile Services Switching Centre, MSC), second-generation or third-generation mobile communication technology (2rd Generation/3rd Generation, 2G or 3G), base station (BS), base station in the embodiment of the present invention includes a base station controller (Base Station Controller, BSC) and Radio Network Controller (RNC); Long Term Evolution (LTE), Serving GPRS Support Node (SGSN), Circuit Domain Fallback (Circuit Switched Fallback) , CSFB), Terrestrial Radio Access Network (UTRAN), Global System of Mobile communication (GSM), Enhanced Data Rate for GSM Evolution (EDGE) Global System for Mobile Communications/Enhancement Data rate GSM evolution Surgery radio access network (GSM / EDGE Radio Access Network, GERAN).
  • MME Mobile Management Entity
  • eNodeB En
  • the first, second, third, fourth, fifth, etc. in the embodiments of the present invention are only used to distinguish different indication information, messages or other objects, and do not represent sequential relationships.
  • FIG. 1 is a process of returning from a LTE network to a 2G or 3G network, and a process of returning to the LTE network after the active call process and the calling process after the handover is performed in the embodiment of the present invention: S100, UE Sending an extended service request to the MME, the extended service request is used to request the circuit domain to fall back to the CSFB.
  • the MME can determine whether the LTE network and the 2G or 3G network support the UE to switch the UE from the LTE network to the CS domain of the 2G or 3G network.
  • the MME may also not judge, but default to consider that the communication network supports the CSFB to be described.
  • the UE switches from the LTE network to the CS domain of the 2G or 3G network, or only some of the networks.
  • the communication network is the LTE network and the 2G or 3G network.
  • the MME sends a notification message to the evolved base station eNodeB according to the extended service request, where the notification message is used to instruct the eNodeB to move the UE from the LTE network to the CS domain of the 2G or 3G network for the CSFB. That is, the notification message is used to indicate that the eNB is the CSFB, and the UE should be moved to a 2G or 3G network.
  • the MME may notify the network to switch to the 2G or 3G network by sending a notification message.
  • CS domain such that the eNodeB initiates a handover request for the CSFB to handover the UE from the LTE network to the CS domain of the 2G or 3G network.
  • the evolved base station eNodeB sends a handover request message to the MME.
  • the handover request message may be a packet switched PS domain handover request message from the LTE network to the 2G or 3G network, for example: LTE to 2/3G PS HO Required message, or from the LTE network to the Said CS domain handover request message of a 2G or 3G network, for example: LTE to 2/3G SRVCC HO Required message, or the PS domain and the CS from the LTE network to the 2G or 3G network Domain switch request message, (for example: LTE to 2/3G SRVCC and PS HO Required message).
  • the handover request message may include UE capability information, which is used to indicate the frequency band information, access capability, and the like supported by the UE.
  • the UE capability information may be at least one of class identifier 2 (classmark 2) and class identifier 3 (classmark 3).
  • classmark 2 class identifier 2
  • classmark 3 class identifier 3
  • the eNodeB when the UE does not support the CS handover of the LTE network to the 2G/3G network, the eNodeB does not send the capability information of the UE to the MME, so the MME does not have the capability information of the UE.
  • the MME may send the capability information of the UE to the MSC, so that the MSC can perform the handover to the 2G/3G CS.
  • the UE capability information may be delivered to the MME by using the handover request message.
  • the MME sends a first handover request message to the MSC, where the first handover request message is used to generate a circuit switched CS domain of the 3G network. Because the first handover request message is sent by the MME to the MSC, the handover required by the first handover request message is a handover from the LTE network to the CS domain of the 2G or 3G network, that is, the first handover request is PS to CS. Switch the request.
  • the first handover request message may carry third indication information, where the third indication information is used for
  • the CS field that is, the third indication information indicates that the first handover request is sent for CSFB.
  • the third indication information may also indicate that the UE supports handover from the LTE network to the 2G or 3G network CS domain.
  • the first handover request message may also not indicate CSFB. At this time, the MSC considers that the first handover request is sent for CSFB by default.
  • the first handover request message may be carried.
  • the UE capability information for example, the capability information is at least one of a class identifier classmark2 and a class identifier classmark3.
  • the MME sends a second handover request message to the SGSN, where the second handover request message is used to request the SGSN to initiate a handover of the packet switched PS domain from the LTE network to the 2G or 3G network.
  • the UE When the UE switches from the LTE network to the CS domain, it can switch to the PS domain at the same time or switch to the PS domain at the same time. This can reduce the network dependence of the solution, that is, the operator only needs to support the CS domain handover of the LTE to 2G or 3G network, and does not need to force the operator to support the PS domain switching of the LTE to the 2G or 3G network.
  • the MSC sends a third handover request message to the base station, where the third handover request message is used to request the base station to allocate a CS domain resource to the CS domain of the 2G or 3G network.
  • the third handover request message is further configured to request the base station to switch the user equipment UE from the long-term evolution LTE network to the circuit-switched CS domain of the 2G or 3G network for the CSFB.
  • the base station allocates CS domain resources for the CS domain that the UE switches from the LTE network to the 2G or 3G network.
  • the CS language resource allocated by the base station includes a wired resource between the base station and the MSC and a radio resource between the base station and the UE.
  • the base station sends a third handover request response message to the MSC, where the third handover request response message includes information about the CS domain radio resource, and the CS domain radio resource information is used by the UE from the LTE network. Switch to the CS domain of the 2G or 3G network.
  • the MSC sends a first handover response message to the MME, where the first handover response message includes information about the CS domain radio resource.
  • the MME sends a handover request response message to the eNodeB, where the handover request response message includes information about the CS domain radio resource.
  • the eNodeB sends a handover command to the UE, where the handover command includes information about the CS domain radio resource.
  • the handover command may also be used to indicate that the UE switches from the LTE network to a PS domain of the 2G or 3G network.
  • the UE switches from the LTE network to the CS domain of the 2G or 3G network according to a handover command.
  • the UE uses the information of the resources included in the handover command to switch from the LTE network to the CS domain of the 2G or 3G network for the CSFB.
  • the UE generates a third session in the process of switching from the LTE network to the CS domain of the 2G or 3G network.
  • the UE may also not generate a session during the handover from the LTE network to the CS domain of the 2G or 3G network.
  • the UE activates the CS domain encryption in the process of switching from the LTE network to the 2G network or the 3G network according to the CS encryption algorithm identifier.
  • the base station when the UE sends the LAU message to the base station, to avoid the failure, the base station does not send a location update request message to the MSC, and the base station directly sends a location update accept message to the UE.
  • the base station forwards the handover complete message in step S145 to the MSC.
  • the UE sends a connection management service request (CM Serivce Request) to the MSC.
  • CM Serivce Request connection management service request
  • the MSC sends an Authenticate Request to the UE.
  • This step S160 may also not be performed, that is, the MSC does not send an authentication request message to the UE.
  • the UE sends an Authenticate Response to the MSC.
  • the MSC sends a security mode command to the base station, carrying complete protection information, (Integrity Protection Information), and/or power secret information, (Encryption). Information), so that the base station sends a security mode command to the UE.
  • complete protection information (Integrity Protection Information)
  • Encryption power secret information
  • This step S170 may also not be performed, that is, the MSC does not send a security mode command to the base station.
  • the base station sends a security mode command to the UE. Specifically, the base station performs this step according to the security mode command in step S170, or the base station performs this step after receiving the S145 message.
  • the MSC sends a connection management service acceptance command (CM service Accept) to the UE.
  • CM service Accept connection management service acceptance command
  • the UE sends a first CS call connection establishment request message (Setup) to the MSC, where the first CS call connection establishment request message is used.
  • the MSC is requested to generate a first session for the CSFB.
  • the first CS call connection setup request message is used to request the MSC to generate the third session for the CSFB.
  • the MSC After receiving the first CS call connection setup request message, the MSC sends the first message to the UE if the first CS call connection setup request message is used to request the MSC to generate a first session for the CSFB.
  • a session release message the first session release message is used to request the UE to release the third session generated by the UE during a handover from the LTE network to a CS domain of the 2G or 3G network.
  • the MSC does not need to send a first session release message to the UE.
  • the MSC performs call peer processing.
  • the MSC sends an alerting message to the UE.
  • the UE waits for the peer to reply to the message.
  • the called party picks up the phone and enters the call state.
  • the MSC sends another notification message to the UE, where the registered PLMN (Registed PLMN, RPLMN) of the UE is used as a PLMN identifier of the LTE network.
  • the registered PLMN Registered PLMN, RPLMN
  • the another notification message carries a location area identifier LAI, where the PLMN information in the location area identifier is the PLMN information of the LTE network, and is used to indicate that the registered PLMN (Registed PLMN, RPLMN) of the UE is an LTE network.
  • the PLMN identifier, or the another notification message carries the PLMN information of the LTE network, and is used to indicate that the registered PLMN (RPMMN) of the UE is a PLMN identifier of the LTE network.
  • the another notification message carries an equivalent PLMN (Equivalent PLMN, EPLMN) List to the UE.
  • PLMN Equivalent PLMN
  • the another notification message may be a TMSI Reallocation Request (TMSI Reallocation Request, Temporary Mobile Subscriber Identities Real Location Request) to the UE, where the TMSI reallocation message carries a location area identifier LAI, where the location area identifier is
  • TMSI Reallocation Request Temporary Mobile Subscriber Identities Real Location Request
  • the PLMN information is the PLMN information of the LTE network, and is used to indicate that the registered PLMN (Registed PLMN, RPLMN) of the UE is a PLMN identity of the LTE network.
  • the TMSI reallocation carries a list of equivalent PLMNs (EPLMNs), wherein the equivalent PLMNs comprise PLMN identifiers of the LTE network.
  • EPLMNs equivalent PLMNs
  • S198 can be sent at any time after receiving the S150 step message.
  • the MME when the UE is jointly attached, the MME sends the location update message to the LTE network.
  • the PLMN information is brought to the MSC, so that the MSC knows the PLMN information of the LTE network.
  • the UE selects an LTE network to be returned according to the identifier of the PLMN.
  • the UE When the call ends, since the call is triggered by CSFB, the UE needs to return to the LTE network after completing the call.
  • the base station determines, according to the third handover request message, that the call is triggered by the CSFB, after the base station of the 2G or 3G network receives the call release message sent by the MSC, the base station of the 2G or 3G network uses the UE Redirecting to the LTE network, or the base station switches the UE to the LTE network, and the call release message is a release command Iu Release Command or a clear command Clear Command.
  • the UE registers the PLMN (Registed PLMN, RPLMN) as the PLMN identity of the LTE network, so when the UE returns to the LTE network, the UE preferentially camps on the LTE PLMN.
  • the base station sends a redirection message (RRC Release with Redirection or RRC Release) to indicate that the UE returns to the LTE network.
  • the UE considers that the current The registered PLMN (Registed PLMN, RPLMN) is the PLMN identity of the LTE network.
  • the registered PLMN (Registed PLMN, RPLMN) is the PLMN identity of the LTE network.
  • the base station may parse the CS signaling between the UE and the MSC.
  • a signaling message sent by the UE to the MSC for example, a connection management service request, an authentication response, and a first
  • the CS calls a signaling message such as a connection establishment request message.
  • the base station may send the signaling message to the MSC using a connection established in the handover process of the CS domain of the LTE network to the 2G or 3G network, or send the signaling message to the MSC by using a direct transmission message.
  • FIG. 1 in the CSFB process, the MSC sends another notification message to the UE, where another notification message carries a location area identifier LAI, where the LAI includes a PLMN identifier of the LTE network.
  • the UE returns to the LTE network preferentially according to the identifier of the PLMN.
  • FIG. 2 is a process of returning to the LTE network after the network switching process and the passive call process and the called process after the network switching in the embodiment of the present invention:
  • the MSC sends a CS paging request to the MME, and the MME triggers the paging process.
  • Steps S200-S250 are the same as steps S100-S150 in FIG. 1, and are not described herein again.
  • the UE sends a paging response to the MSC.
  • the MSC sends an authentication request to the UE.
  • This step S260 may also not be performed, that is, the MSC does not send an authentication request message to the UE. S265. The UE sends an authentication response to the MSC.
  • the MSC sends a security mode command to the base station, and carries Integrity Protection Information and/or Encryption Information to send a security mode command to the UE at the station.
  • This step S270 may also not be performed, that is: the MSC does not send a security mode command to the base station.
  • the base station sends a security mode command to the UE. Specifically, the base station performs this step according to the security mode command in step S270, or the base station performs this step after receiving the S245 message.
  • the MSC sends a second CS call connection setup request message to the UE, where the second CS call connection setup request message is used to request the UE to generate a second session for the CSFB.
  • the second CS call connection setup request message is used to request the UE to generate the third session for the CSFB.
  • the method further includes:
  • the UE receives or transmits session data of the second session using the resource. S285.
  • the MSC receives a call confirmation message sent by the UE.
  • the MSC sends a second session release message to the UE, where the second session is released during the CS domain release process.
  • the third session If the second CS call connection setup request message is used to request the UE to generate a second session for the CSFB, the MSC sends a second session release message to the UE, where the second session is released during the CS domain release process. The third session.
  • the MSC does not need to send a second session release message to the UE.
  • the UE receives a session release message sent by the MSC.
  • the MSC sends an alerting message to the UE.
  • the UE enters a call state.
  • the MSC triggers the peer ringing.
  • the MSC sends another notification message to the UE, where the registered PLMN (Registed PLMN, RPLMN) of the UE is a PLMN identifier of the LTE network.
  • the registered PLMN Registered PLMN, RPLMN
  • the another notification message carries a location area identifier LAI, where the PLMN information in the location area identifier is the PLMN information of the LTE network, and is used to indicate that the registered PLMN (Registed PLMN, RPLMN) of the UE is an LTE network.
  • the PLMN identifier, or the another notification message carries the PLMN information of the LTE network, and is used to indicate that the registered PLMN (RPMMN) of the UE is a PLMN identifier of the LTE network.
  • the another notification message carries a list of carrying an equivalent PLMN (EPLMN) to the UE.
  • EPLMN equivalent PLMN
  • the another notification message may be a TMSI reallocation message (TMSI Reallocation)
  • the TMSI re-allocation message carries a location area identifier LAI, where the PLMN information in the location area identifier is PLMN information of the LTE network, and is used to indicate the registered PLMN of the UE ( Registed PLMN, RPLMN) is the PLMN identity of the LTE network.
  • the TMSI re-allocation message carries an equivalent PLMN (Equivalent PLMN,
  • the EPLMN list is for the UE, where the equivalent PLMN includes the PLMN identity of the LTE network.
  • S298 can be sent at any time after receiving the S250 step message.
  • the MME when the UE is jointly attached, the MME sends the location update message to the LTE network.
  • the PLMN information is brought to the MSC, so that the MSC learns the PLMN information of the LTE network.
  • the UE selects an LTE network to be returned according to the identifier of the PLMN.
  • the UE When the call ends, since the call is triggered by CSFB, the UE needs to return after completing the call.
  • the base station determines, according to the third handover request message, that the call is triggered by the CSFB, and therefore, after receiving the call release message sent by the MSC, the base station of the 2G or 3G network, the 2G or
  • the base station of the 3G network redirects the UE to the LTE network, or the base station switches the UE to the LTE network, and the call release message is a release command Iu Release Command or a clear command Clear Command.
  • the UE registers the PLMN (Registed PLMN, RPLMN) as the PLMN identity of the LTE network, so when the UE returns to the LTE network, the UE preferentially camps on the LTE PLMN.
  • the base station sends a redirection message (RRC Release with Redirection or RRC Release) to indicate that the UE returns to the LTE network.
  • the UE considers that the currently registered PLMN (Registed PLMN, RPLMN) is the PLMN identity of the LTE network.
  • the currently registered PLMN (Registed PLMN, RPLMN) is the PLMN identity of the LTE network.
  • FIG. 2 in the CSFB process, the MSC sends another notification message to the UE, where another notification message carries a location area identifier LAI, where the LAI includes a PLMN identifier of the LTE network.
  • the UE returns to the LTE network preferentially according to the identifier of the PLMN.
  • FIG. 3 is a process of the UE performing the fallback process of the handover from the LTE network to the 2G or 3G network, and the process of returning to the LTE network after the active call process and the calling process after the handover is performed in the embodiment of the present invention: H100 and H100a are the same as steps S100 and S100 in FIG. 1, and are not described herein again.
  • the MME sends a first notification message to the evolved base station eNB according to the extended service request, where the first notification message is used to instruct the evolved base station eNB to move the UE from the LTE network to the 2G or 3G for the CSFB.
  • the network that is, the first notification message is used to indicate that the eNB is the CSFB, the UE should be moved to a 2G or 3G network.
  • H110 and H115 are the same as steps S110 and S115 in FIG. 1, and are not described herein again.
  • H120. The MME sends a handover request message from the PS to the PS to the SGSN, where the handover request message from the PS to the PS is used to request the SGSN to initiate a packet switched PS domain from the LTE network to the 2G or 3G network. Switch.
  • Step H120 is an optional step.
  • the network When the network is ready to switch the UE from the LTE network to the CS domain, it may also switch to the PS domain or not to the PS domain.
  • the MSC sends a second handover request message to a base station (BSC or RNC) of the 2G or 3G network, where the second handover request message is used to request the base station to switch the UE from the LTE network to the CS of the 2G or 3G network. area.
  • BSC base station
  • RNC Radio Network Controller
  • the base station sends a second handover request acknowledgement message to the MSC, where the second handover request acknowledgement message includes a radio access bearer RAB, and the UE switches from the LTE network to the 2G by using the RAB as the CSFB. Or the PS domain of the 3G network.
  • RAB radio access bearer
  • the MSC sends a first handover request response message to the MME, where the first handover request response message includes the RAB.
  • the MME sends a handover request response to the eNB, and the handover request response command includes the RAB.
  • the eNB sends a handover command to the UE, where the RAB is included in the handover command.
  • the eNB determines that the UE supports handover from the LTE network to a PS domain of the 2G or 3G network.
  • the UE switches from the LTE network to the PS domain of the 2G or 3G network according to the RAB included in the handover command.
  • a handover complete message (HO Complete) is sent to the base station.
  • the base station may use the CS RAB generated in step H125.
  • the base station can establish a new CS RAB.
  • the base station forwards the handover complete message in step S145 to the MSC.
  • H155-H185 is the same as steps S155 and S185 in Fig. 1, and will not be described again here.
  • the MSC sends a call proceeding message to the UE.
  • the base station sends a second notification message to the UE.
  • the UE may send a second notification response message to the base station.
  • the base station receives the call setup message sent by the UE or the call processing message sent by the MSC, the base station sends the message to the The UE sends a second notification message, the second notification message including the CSRAB allocated by the base station to the UE, such as the CS RAB described in step H125 or the CS RAB described in step H145a.
  • the second notification message may be a radio bearer setup or a radio bearer reconfiguration message.
  • the UE can use the CS RAB for voice calls.
  • the base station may also send the second notification message after receiving the third notification message sent by the MSC. After receiving the at least one of the following messages, the MSC sends a second notification message to the base station, where the second notification message is used to request the base station to allocate a CS domain resource to the UE.
  • the following message includes: a handover complete message sent by the base station, a connection management service request message sent by the UE, and the first CS call connection request message sent by the UE.
  • the MSC sends an alerting message to the UE.
  • the UE waits for the peer to reply to the message.
  • the calling party After the called party picks up the phone, the calling party is called into the call state.
  • the UE picks up the phone and enters the call state.
  • the MSC sends a third notification message to the UE, to indicate registration of the UE.
  • the PLMN (Registed PLMN, RPLMN) is the PLMN identity of the LTE network.
  • the third notification message carries a location area identifier LAI, where the PLMN information in the location area identifier is PLMN information of the LTE network, and is used to indicate that the registered PLMN (Registed PLMN, RPLMN) of the UE is an LTE network.
  • the PLMN identifier, or the third notification message carries the PLMN information of the LTE network, and is used to indicate that the registered PLMN (RPMMN) of the UE is a PLMN identifier of the LTE network.
  • the third notification message carries a list of carrying an equivalent PLMN (EPLMN) to the UE.
  • EPLMN equivalent PLMN
  • the third notification message may be a TMSI Reallocation Request (TMSI Reallocation Request, Temporary Mobile Subscriber Identities Real Location Request) to the UE, where the TMSI reallocation message carries a location area identifier LAI, where the location area identifier is
  • the PLMN information is the PLMN information of the LTE network, and is used to indicate that the registered PLMN (Registed PLMN, RPLMN) of the UE is a PLMN identity of the LTE network.
  • the TMSI re-allocation message carries a list of carrying an equivalent PLMN (EPLMN) to the UE, where the equivalent PLMN includes a PLMN identifier of the LTE network.
  • ELMN equivalent PLMN
  • H198 can be sent at any time after receiving the H150 step message.
  • the MME sends the PLMN information of the LTE network to the MSC in the sending location update message, so that the MSC learns the PLMN information of the LTE network.
  • the UE selects an LTE network to be returned according to the identifier of the PLMN.
  • the UE registers the PLMN (Registed PLMN, RPLMN) as the PLMN identity of the LTE network, so when the UE returns to the LTE network, the UE preferentially camps on the LTE PLMN.
  • the base station sends a redirection message (RRC Release with Redirection or RRC Release) to indicate that the UE returns to the LTE network.
  • FIG. 4 is a process of returning to the LTE network after the network switching process and the passive call process and the called process after the network switching in the embodiment of the present invention:
  • H0b-H0c The MSC sends a CS paging request to the MME, and the MME triggers the paging process.
  • the steps H200-H250 are the same as the steps H100-H150 in FIG. 3, and details are not described herein again.
  • the UE sends a paging response to the MSC.
  • the MSC sends an authentication request to the UE.
  • the UE sends an authentication response to the MSC.
  • H270 The MSC sends a security mode command to the base station, carries Integrity Protection Information and/or Encryption Information, and sends a security mode command to the UE at the station.
  • This step H270 may also not be performed, that is: the MSC does not send a security mode command to the base station.
  • the base station sends a security mode command to the UE. Specifically, the base station according to step H270 The security mode command is executed, or the base station performs this step after receiving the H245 message.
  • the MSC sends a second CS call connection setup request message to the UE, where the second CS call connection setup request message is used to request the UE to generate a second session.
  • the MSC can also initiate CS supplementary service requests to the UE on the 2G/3G network, such as: 3 ⁇ 4 port location service request, or USSD (UnstmcturedSupplementaryServiceData, unstructured supplementary data service service request. That is, The UE may fall back from the LTE network execution circuit because the MSC is to initiate a CS call or initiate a CS supplementary service request on the 2G or 3G network.
  • CS supplementary service requests to the UE on the 2G/3G network, such as: 3 ⁇ 4 port location service request, or USSD (UnstmcturedSupplementaryServiceData, unstructured supplementary data service service request. That is, The UE may fall back from the LTE network execution circuit because the MSC is to initiate a CS call or initiate a CS supplementary service request on the 2G or 3G network.
  • the MSC receives a call confirmation message sent by the UE.
  • the base station sends a second notification message to the UE.
  • the UE may send a second notification response message to the base station.
  • the base station In order to maximize the matching with the existing processing procedure of the UE, reduce the abnormality, and avoid the call failure, after the base station receives the call setup message sent by the MSC or the call acknowledgement message sent by the UE, the base station sends the UE to the UE. And transmitting a second notification message, where the second notification message includes a CSRAB allocated by the base station to the UE, such as the CS RAB described in step H225 or the CS RAB described in step H245a.
  • the second notification message may be a radio bearer setup or a radio bearer reconfiguration message.
  • the UE can use the CS RAB for voice calls.
  • the base station may also send the second notification message after receiving the third notification message sent by the MSC. After receiving the at least one of the following messages, the MSC sends a second notification message to the base station, where the second notification message is used to request the base station to allocate a CS domain resource to the UE.
  • the following message includes: a handover complete message sent by the base station, a paging response sent by the UE, and the second CS call connection request message sent by the MSC.
  • the MSC sends an Alerting message to the UE.
  • the UE picks up the phone and enters the call state.
  • the MSC sends a third notification message to the UE, where the registered PLMN (Registed PLMN, RPLMN) of the UE is used as a PLMN identifier of the LTE network.
  • the registered PLMN Registered PLMN, RPLMN
  • the third notification message carries a location area identifier LAI, where the PLMN information in the location area identifier is PLMN information of the LTE network, and is used to indicate that the registered PLMN (Registed PLMN, RPLMN) of the UE is an LTE network.
  • PLMN identifier, or the third pass The known message carries the PLMN information of the LTE network, and is used to indicate that the registered PLMN (Registed PLMN, RPLMN) of the UE is a PLMN identity of the LTE network.
  • the third notification message carries a list of carrying an equivalent PLMN (EPLMN) to the UE.
  • EPLMN equivalent PLMN
  • the third notification message may be a TMSI reallocation message (TMSI Reallocation)
  • the TMSI re-allocation message carries a location area identifier LAI, where the PLMN information in the location area identifier is PLMN information of the LTE network, and is used to indicate the registered PLMN of the UE ( Registed PLMN, RPLMN) is the PLMN identity of the LTE network.
  • the TMSI re-allocation message carries an equivalent PLMN (Equivalent PLMN,
  • the EPLMN list is for the UE, where the equivalent PLMN includes the PLMN identity of the LTE network.
  • H298 can be sent at any time after receiving the H250 step message.
  • the MME sends the PLMN information of the LTE network to the MSC in the sending location update message, so that the MSC learns the PLMN information of the LTE network.
  • H299 The UE selects an LTE network to be returned according to the identifier of the PLMN.
  • the UE registers the PLMN (Registed PLMN, RPLMN) as the PLMN identity of the LTE network, so when the UE returns to the LTE network, the UE preferentially camps on the LTE PLMN.
  • the base station sends a redirection message (RRC Release with Redirection or RRC Release) to indicate that the UE returns to the LTE network.
  • the UE considers that the current The registered PLMN (Registed PLMN, RPLMN) is the PLMN identity of the LTE network.
  • the registered PLMN (Registed PLMN, RPLMN) is the PLMN identity of the LTE network.
  • the MSC sends a third notification message to the UE, where the third notification message carries a location area identifier LAI, where the LAI includes a PLMN identifier of the LTE network :
  • the UE returns to the LTE network preferentially according to the identifier of the PLMN.
  • an embodiment of a method for selecting an LTE network includes: 101.
  • a mobile switching center MSC receives a first handover request sent by a mobility management entity MME.
  • the first handover request message is used to request the MSC to switch the user equipment UE from the long term evolution LTE network to the circuit switched CS domain of the second generation 2G or third generation 3G network for the circuit domain fallback CSFB.
  • the MSC receives a handover complete message, where the handover complete message indicates that the UE has completed handover from the LTE network to a CS domain of the 2G or 3G network.
  • the MSC sends a notification message to the UE, where the notification message carries a location area identifier.
  • the LAI includes the PLMN identity of the LTE network, and the PLMN identity of the LTE network is used to indicate that the UE selects an LTE network to return according to the PLMN identity of the LTE network.
  • the notification message is a TMSI reallocation message.
  • the description in the embodiment corresponding to FIG. 1 to FIG. 4 is omitted here.
  • another embodiment of a method for selecting an LTE network includes: 201.
  • a user equipment UE located in a long term evolution LTE network sends a request message to a mobility management entity MME, where the request message is used to request a circuit.
  • the domain falls back to CSFB.
  • the UE receives a handover command sent by an eNodeB eNodeB, where the handover command is used to instruct the UE to switch from the LTE network to a circuit switched CS domain of a 2G or 3G network.
  • the UE switches from the LTE network to the CS domain of the 2G or 3G network according to the handover command.
  • the UE receives a notification message sent by the MSC, where the notification message includes a location area identifier LAI, where the LAI includes a PLMN identifier of the LTE network.
  • the UE selects an LTE network to return to according to the identifier of the PLMN.
  • the notification message is a TMSI reallocation message.
  • the mobile switching center MSC80 provided by the embodiment of the present invention includes: a receiving unit 801, The generating unit 802 and the transmitting unit 803.
  • the receiving unit 801 is configured to receive a first handover request message and a handover complete message sent by the mobility management entity MME, where the first handover request message is used to request the MSC to drop the user equipment UE from the long term evolution LTE network for the circuit domain fallback CSFB Switching to a circuit switched CS domain of a second generation 2G or third generation 3G network, the handover complete message indicating that the UE has completed handover from the LTE network to the CS domain of the 2G or 3G network.
  • the generating unit 802 is configured to generate a notification message according to the handover complete message received by the receiving unit 801, where the notification message carries a location area identifier LAI, where the LAI includes a PLMN identifier of the LTE network, and the LTE network
  • the PLMN identity is used to instruct the UE to select an LTE network source to return to according to the PLMN identity of the LTE network.
  • the sending unit 803 is configured to send the notification message generated by the generating unit 802.
  • the notification message is a TMSI reallocation message
  • the notification message carries an equivalent PLMN list, wherein the equivalent PLMN list includes a PLMN identity of the LTE network.
  • the MSC in this embodiment may perform the method of the MSC described in the method embodiment of FIG. 1 to FIG. 5, the receiving unit 801 is configured to receive a message sent by another entity to the MSC, and the sending unit 803 is configured to send the message to the MSC.
  • the user equipment 90 provided by the embodiment of the present invention includes: a sending unit 901, a receiving unit 902, a switching unit 903, and a selecting unit 904.
  • the sending unit 901 is configured to send a request message to the mobility management entity MME, where the request message is used to request the circuit domain to fall back to the CSFB.
  • the receiving unit 902 is configured to receive a handover command sent by the eNodeB eNodeB, where the handover command is used to instruct the UE to switch from the LTE network to a circuit switched CS domain of the 2G or 3G network.
  • the switching unit 903 is configured to switch from the LTE network to the CS domain of the 2G or 3G network according to the handover command received by the receiving unit 901.
  • the receiving unit 902 is further configured to receive a notification message sent by the MSC, where the notification message is A location area identifier LAI is included, the LAI including a PLMN identity of the LTE network.
  • the selecting unit 904 is configured to select an LTE network to be returned according to the identifier of the PLMN received by the receiving unit 902.
  • the receiving unit 902 is further configured to receive a redirect message or an air interface connection release message sent by the base station of the 2G or 3G network, where the redirect message or the air interface connection release message triggers the selecting unit 904 according to the receiving unit
  • the identity of the PLMN received 902 selects the LTE network to return to.
  • the UE in this embodiment may perform the method steps of the UE described in the method embodiments of FIG. 1 and FIG. 4, and the receiving unit 902 is configured to receive a message sent by another entity to the UE, where the sending unit 901 is configured to
  • the MSC sends a notification message to the UE, where the notification message carries a location area identifier LAI, where the LAI includes a PLMN identifier of the LTE network, so that The UE returns to the LTE network preferentially according to the identifier of the PLMN.
  • the transmitting unit for transmitting the message can be implemented by using a transmitter
  • the receiving unit for receiving the message can be implemented by using a receiver.
  • both the transmitting unit and the receiving unit can be implemented by using a transceiver.
  • the transmitter or the transceiver may be implemented by one physical entity, or may be implemented by multiple physical entities.
  • the transmitter and the transceiver may be implemented by one physical entity or multiple physical entities. This is not a limitation.
  • Other units, such as a generating unit, an allocating unit, a redirection unit, a switching unit, a determining unit, and the like, may be implemented by one or more processors, which are not limited in the present invention.
  • an embodiment of a system for selecting an LTE network includes: a mobile management entity 60, an evolved base station 70, a mobile switching center 80, a base station 100, and a user equipment 90;
  • the actions performed by the mobility management entity 60, the evolved base station 70, the mobile switching center 80, the base station 100, and the user equipment 90, and the interaction therebetween, may be described with reference to the descriptions of FIGS. 1-4 and the methods of FIGS. 5-8. Descriptions of examples and device embodiments are not described herein.
  • the unit and algorithm steps of the example can be implemented by electronic hardware, computer software or a combination of the two. In order to clearly illustrate the interchangeability of hardware and software, the examples have been generally described in terms of functions in the above description. Composition and steps. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the solution.
  • the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, or an electrical, mechanical or other form of connection.
  • the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the objectives of the embodiments of the present invention.
  • each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.
  • the above integrated unit can be implemented in the form of hardware or in the form of a software functional unit.
  • the integrated unit, if implemented in the form of a software functional unit and sold or used as a standalone product, may be stored in a computer readable storage medium. Based on this understanding, this issue
  • the technical solution of the prior art, or the contribution to the prior art, or all or part of the technical solution may be embodied in the form of a software product stored in a storage medium, including a plurality of instructions.
  • the foregoing storage medium includes: a U disk, a removable hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, and the like, which can store program codes.
  • the LTE network mentioned in the present invention includes an LTE A network, and may subsequently have an LTE version.

Abstract

本发明公开了一种选择LTE网络的方法,在CSFB过程中,触发UE从LTE 网络切换到2G或者3G网络的CS域,通过切换的方式回退到具有CS域的网络后,所述MSC发送通知消息给所述UE,所述通知消息携带位置区标识LAI,所述LAI中包含所述LTE网络的PLMN标识, 以便所述UE根据所述PLMN的标识,优先返回到所述LTE网络。

Description

一种选择 LTE网络的方法、 设备及系统 技术领域
本发明涉及通信技术领域, 具体涉及选择 LTE网络的方法、 设备及系统。
背景技术
全球移动通讯系统( Global System of Mobile communication, GSM )或者 宽带码分多址(Wideband Code Division Multiple Access , WCDMA )等第二代 ( Second Generation, 2G )或者第三代网络( Third Generation, 3G )网络已经 基本实现了全面覆盖。
随着长期演进( Long Term Evolution, LTE ) 网络技术的发展, 这些 LTE 网络已覆盖到一些城区和话务热点地区,这样在目前的通信网络中, LTE网络 与 2G或 3G网络并存。
用户设备 ( User Equipment, UE )在一次呼叫过程中, 可能会从 LTE网 络进入 2G或 3G网络, 由于 LTE网络与 2G或 3G网络的承载机制不同, 需 要从分组交换(Packet Switching, PS )域切换到电路交换( Circuit Switching , CS )域, 可能会出现语音呼叫的间断, 从而影响用户语音呼叫的连续性。
电路域回落(Circuit Switched Fallback, CSFB)为 LTE覆盖下的用户设备 ( User Equipment, UE )在处理语音业务时, 触发 UE从 LTE网络切换到 2G或 者 3G网络的 CS域,通过切换的方式回退到具有 CS域的网络,在具有 CS域的网 络处理语音业务。
但是在现有技术中, 因为 UE从 LTE网络切换回落到 2G或 3G网络后, UE的注册公共陆地移动网络 PLMN从 LTE网络的第一 PLMN 变化为 2G或 3G 网络的第二 PLMN。
当 UE从 2G或 3G网络返回 LTE网络时, 因为 UE当前的注册 PLMN为 第二 PLMN, 所以 UE会优先驻扎在第二 PLMN, 从而导致 UE无法回到第一 PLMN,从而导致第一 PLMN的运营商在 CSFB过程出现用户流失,从而导致 运营商之间无法合作。 发明内容
针对现有技术的上述问题, 本发明实施例提供一种选择 LTE网络的方法, 在 CSFB过程中, 所述 MSC发送通知消息给所述 UE, 所述通知消息携带位置区 标识 LAI, 所述 LAI中包含所述 LTE网络的 PLMN标识, 以便所述 UE根据所述 PLMN的标识, 优先返回到所述 LTE网络。 本发明实施例还提供了相应的设备 及系统。
本发明第一方面提供一种选择 LTE网络的方法, 包括:
移动交换中心 MSC接收移动管理实体 MME发送的第一切换请求消息, 所 述第一切换请求消息用于请求所述 MSC为电路域回落 CSFB将用户设备 UE从 长期演进 LTE网络切换到第二代 2G或第三代 3G网络的电路交换 CS域;
所述 MSC接收切换完成消息, 所述切换完成消息指示所述 UE已经完成从 所述 LTE网络到所述 2G或 3G网络的 CS域的切换;
所述 MSC发送通知消息给所述 UE, 所述通知消息携带位置区标识 LAI, 所述 LAI中包含所述 LTE网络的 PLMN标识, 所述 LTE网络的 PLMN标识用于指 示所述 UE根据所述 LTE网络的 PLMN标识选择要返回到的 LTE网络。
结合第一方面, 在第一种可能的实现方式中,
所述通知消息为 TMSI重分配消息。
本发明第二方面提供一种选择 LTE网络的方法, 包括:
位于长期演进 LTE网络的用户设备 UE向移动管理实体 MME发送请求消 息, 所述请求消息用于请求电路域回落 CSFB;
所述 UE接收演进基站 eNodeB发送的切换命令, 所述切换命令用于指示所 述 UE为所述 CSFB从所述 LTE网络切换到 2G或 3G网络的电路交换 CS域;
根据所述切换命令,所述 UE从所述 LTE网络切换到所述 2G或 3G网络的 CS 域;
所述 UE接收所述 MSC发送的通知消息, 所述通知消息包含位置区标识
LAI , 所述 LAI包含所述 LTE网络的 PLMN标识;
所述 UE根据所述 PLMN的标识, 选择要返回到的 LTE网络。
结合第二方面, 在第一种可能的实现方式中, 所述方法还包括: 所述 UE接收所述 2G或 3G网络的基站发送的重定向消息或者空口连接释 放消息, 所述重定向消息或者空口连接释放消息触发所述 UE根据所述 PLMN 的标识选择要返回到的 LTE网络。
结合第二方面或第二方面第一种可能的实现方式,在第二种可能的实现方 式中,
所述通知消息为 TMSI重分配消息。
本发明第三方面提供一种移动交换中心 MSC, 包括:
接收单元, 用于接收移动管理实体 MME发送的第一切换请求消息和切换 完成消息, 所述第一切换请求消息用于请求所述 MSC为电路域回落 CSFB将用 户设备 UE从长期演进 LTE网络切换到第二代 2G或第三代 3G网络的电路交换 CS域,所述切换完成消息指示所述 UE已经完成从所述 LTE网络到所述 2G或 3G 网络的 CS域的切换;
生成单元, 用于根据所述接收单元接收的所述切换完成消息生成通知消 息, 所述通知消息携带位置区标识 LAI, 所述 LAI中包含所述 LTE网络的 PLMN 标识, 所述 LTE网络的 PLMN标识用于指示所述 UE根据所述 LTE网络的 PLMN 标识选择要返回到的 LTE网络;
发送单元, 用于发送所述生成单元生成的所述通知消息。
结合第三方面, 在第一种可能的实现方式中,
所述通知消息为 TMSI重分配消息。
本发明第四方面提供一种用户设备 UE, 包括:
发送单元, 用于向移动管理实体 MME发送请求消息, 所述请求消息用于 请求电路域回落 CSFB;
接收单元, 用于接收演进基站 eNodeB发送的切换命令, 所述切换命令用 于指示所述 UE为所述 CSFB从所述 LTE网络切换到 2G或 3G网络的电路交换 CS 域;
切换单元, 用于根据所述接收单元接收的所述切换命令, 从所述 LTE网络 切换到所述 2G或 3G网络的 CS域;
所述接收单元, 还用于接收所述 MSC发送的通知消息, 所述通知消息包 含位置区标识 LAI , 所述 LAI包含所述 LTE网络的 PLMN标识;
选择单元, 用于根据所述接收单元接收的所述 PLMN的标识, 选择要返回 到的 LTE网络。
结合第四方面, 在第一种可能的实现方式中,
所述接收单元, 还用于接收所述 2G或 3G网络的基站发送的重定向消息或 者空口连接释放消息,所述重定向消息或者空口连接释放消息触发所述选择单 元根据所述接收单元接收的所述 PLMN的标识选择要返回到的 LTE网络。
通过本发明提供的实施例, 在 CSFB过程中, 所述 MSC发送通知消息给所 述 UE, 所述通知消息携带位置区标识 LAI, 所述 LAI中包含所述 LTE网络的 PLMN标识, 以便所述 UE根据所述 PLMN的标识, 优先返回到所述 LTE网络。
附图说明
为了更清楚地说明本发明实施例中的技术方案,下面将对实施例描述中所 需要使用的附图作筒单地介绍,显而易见地,下面描述中的附图仅仅是本发明 的一些实施例, 对于本领域技术人员来讲, 在不付出创造性劳动的前提下, 还 可以根据这些附图获得其他的附图。
图 1是本发明实施例中选择 LTE网络的方法的一实施例示意图;
图 2是本发明实施例中选择 LTE网络的方法的另一实施例示意图; 图 3是本发明实施例中选择 LTE网络的方法的另一实施例示意图; 图 4是本发明实施例中选择 LTE网络的方法的另一实施例示意图; 图 5是本发明实施例中选择 LTE网络的另一实施例示意图;
图 6是本发明实施例中选择 LTE网络的另一实施例示意图;
图 7是本发明实施例中移动交换中心的一实施例示意图;
图 8是本发明实施例中用户设备的一实施例示意图;
图 9是本发明实施例中系统的一实施例示意图。
具体实施方式
本发明实施例提供一种选择 LTE网络的方法, 在 CSFB过程中, 所述 MSC 发送通知消息给所述 UE, 所述通知消息携带位置区标识 LAI, 所述 LAI中包含 所述 LTE网络的 PLMN标识, 以便所述 UE根据所述 PLMN的标识, 优先返回到 所述 LTE网络。 本发明实施例还提供了相应的设备及系统。 以下分别进行详细 说明。
本发明实施例涉及到的部分通信名词的中英文对照及缩写包括:移动管理 实体 ( Mobile Managenment Entity, MME )、 演进基站 ( Envolved NodeB , eNodeB )、 用户设备( User Equipment, UE )、 移动交换中心( Mobile Services Switching Centre, MSC)、第二代或者第三代移动通信技术(2rd Generation/3rd Generation , 2G或 3G )、 基站( Base Station, BS)、 本发明实施例中的基站包 括基站控制器( Base Station Controller, BSC )和无线网络控制器( Radio Network Controller, RNC); 长期演进 (Long Term Evolution, LTE), 服务 GPRS支撑 节点 (Serving GPRS Support Node, SGSN) , 电路域回落(Circuit Switched Fallback, CSFB),陆地无线接入网( Terrestrial Radio Access Network, UTRAN)、 全球移动通讯系统( Global System of Mobile communication, GSM )、 增强型 数据速率 GSM演进技术(EnhancedDataRateforGSMEvolution, EDGE )全球移 动通讯系统 /增强型数据速率 GSM演进技术无线接入网络( GSM / EDGE Radio Access Network, GERAN )。
本发明实施例中的第一、 第二、 第三、 第四、 第五等仅用于区分不同的指 示信息、 消息或其他对象, 不代表顺序关系。
下面将结合本发明实施例中的附图,对本发明实施例中的技术方案进行清 楚、 完整地描述, 显然, 所描述的实施例仅仅是本发明一部分实施例, 而不是 全部的实施例。基于本发明中的实施例,本领域技术人员在没有作出创造性劳 动前提下所获得的所有其他实施例, 都属于本发明保护的范围。
参阅图 1 , 图 1为本发明实施例中 UE通过从 LTE网络切换到 2G或 3G网络的 实现的回落过程及切换后的主动呼叫过程和主叫过程后回到 LTE网络的过程: S100、 UE向 MME发送扩展业务请求, 所述扩展业务请求用于请求电路域 回落 CSFB。
S100a、 MME可以判断 LTE网络和 2G或 3G网络是否支持为 CSFB将 UE从 LTE网络切换到 2G或 3G网络的 CS域。
MME也可以不进行判断,而是缺省认为通信网络支持为所述 CSFB将所述 UE从所述 LTE网络切换到所述 2G或 3G网络的 CS域,或者只对其中的某些网络 进行判断。
所述通信网络是所述 LTE网络和所述 2G或 3G网络。
S105、 MME根据所述扩展业务请求, 向演进基站 eNodeB发送通知消息, 所述通知消息用于指示所述 eNodeB为所述 CSFB将所述 UE从 LTE网络移动到 2G或 3G网络的 CS域, 也就是, 通知消息用于指示所述 eNB为所述 CSFB所述 UE应当被移动到 2G或 3G网络。
当 MME判断 LTE网络和 2G或 3G网络支持为所述 CSFB将所述 UE从所述 LTE网络切换到所述 2G或 3G网络的 CS域, MME可以通过发送通知消息告知 络切换到 2G或 3G网络的 CS域, 以使 eNodeB发起为所述 CSFB将所述 UE从所述 LTE网络切换到 2G或 3G网络的 CS域的切换要求。
S 110、 演进基站 eNodeB向 MME发送切换要求消息。
所述切换要求消息可以为从所述 LTE网络到所述 2G或 3G网络的分组交换 PS域切换要求消息, (例如: LTE to 2/3G PS HO Required消息), 或从所述 LTE 网络到所述 2G或 3G网络的所述 CS域切换要求消息,(例如: LTE to 2/3G SRVCC HO Required消息), 或从所述 LTE网络到所述 2G或 3G网络的所述 PS域和所述 CS域切换要求消息, (例如: LTE to 2/3G SRVCC and PS HO Required消息)。
所述切换要求消息可以包含 UE能力信息, 用于指示 UE所支持的频段信 息、 接入能等等。 例如, 该 UE能力信息可以是类标识 2(classmark2)和类标识 3(classmark3)中的至少一个。 现有技术中, 当 UE不支持 LTE网络到 2G/3G网络 的 CS切换时, eNodeB不会将 UE的能力信息发给 MME, 因此 MME没有 UE的能 力信息。 但在 MME在获取到 UE的能力信息之后, MME可以将 UE的能力信息 发送给 MSC, 以便 MSC能执行到 2G/3G CS切换。 在本发明实施例中, 通过切 换请求消息可以将 UE能力信息传递给 MME。
S115、 MME向 MSC发送第一切换请求消息, 所述第一切换请求消息用于 代 3G网络的电路交换 CS域。 因为该第一切换请求消息是 MME发给 MSC的, 因此该第一切换请求消息 要求的切换是从 LTE网络到 2G或 3G网络的 CS域的切换, 即该第一切换请求为 PS到 CS的切换请求。
所述第一切换请求消息可以携带第三指示信息, 所述第三指示信息用于请
CS域, 也就是说, 通过该第三指示信息表示该第一切换请求是为 CSFB而发送 的。 第三指示信息还可以指示所述 UE支持从所述 LTE网络切换到所述 2G或 3G 网络 CS域。 该第一切换请求消息也可以不指示 CSFB, 此时 MSC缺省认为第一 切换请求是为 CSFB而发送的。
当 MME从 eNodeB收到 UE的能力信息后,所述第一切换请求消息可以携带
UE能力信息, 例如, 该能力信息为类标识 classmark2和类标识 classmark3中的 至少一个。
S120、 MME向 SGSN发送第二切换请求消息,所述第二切换请求消息用于 请求所述 SGSN发起从所述 LTE网络到所述 2G或 3G网络的分组交换 PS域的切 换。
UE从 LTE网络切换到 CS域时, 可以同时切换到 PS域, 也可以不同时切换 到 PS域。 这样可以减少本方案对网络依赖度, 即只要求运营商支持 LTE到 2G 或 3G网络的 CS域切换即可,无需强制运营商支持 LTE到 2G或 3G网络的 PS域切 换。
S121、 MSC向基站发送第三切换请求消息, 所述第三切换请求消息用于 请求所述基站为所述 UE切换到所述 2G或 3G网络的 CS域分配 CS域资源。
所述第三切换请求消息还用于请求所述基站为 CSFB将用户设备 UE从长 期演进 LTE网络切换到所述 2G或 3G网络的电路交换 CS域。 基站为所述 UE从 LTE网络切换到所述 2G或 3G网络的 CS域分配 CS域资源。 例如,基站分配的 CS 语资源包括基站和 MSC之间的有线资源以及基站和 UE之间的无线资源。
S125、 基站向 MSC发送第三切换请求响应消息, 所述第三切换请求响应 消息中包含所述 CS域无线资源的信息,所述 CS域无线资源的信息用于所述 UE 从所述 LTE网络切换到所述 2G或 3G网络的 CS域。 S130、 MSC向 MME发送第一切换响应消息, 所述第一切换响应消息中包 含所述 CS域无线资源的信息。
S135a、 MME向 eNodeB发送切换要求响应消息, 所述切换要求响应消息 中包含所述 CS域无线资源的信息。
S135b、 eNodeB向 UE发送切换命令, 所述切换命令中包含所述 CS域无线 资源的信息。
所述切换命令还可以用于指示所述 UE从所述 LTE网络切换到所述 2G或 3G网络的 PS域。
S140、 UE根据切换命令, 从所述 LTE网络切换到所述 2G或 3G网络的 CS 域。
UE使用切换命令中包含的资源的信息, 为所述 CSFB从所述 LTE网络切换 到所述 2G或 3G网络的 CS域。
UE在从所述 LTE网络切换到所述 2G或 3G网络的 CS域过程中生成第三会 话。 UE在从所述 LTE网络切换到所述 2G或 3G网络的 CS域过程中也可以不生成 会话。
当所述资源的信息包含 CS加密算法标识时,所述 UE根据所述 CS加密算法 标识,在从所述 LTE网络切换到所述 2G网络或 3G网络的过程中激活 CS域加密。
S145、 UE切换完成后, 向基站 (BSC或者 RNC ) 发送切换完成 ( HO Complete ) 消息。
或者, 当 UE发送 LAU消息给基站时, 为避免失败, 基站不向所述 MSC发 送位置更新请求消息, 基站直接发送位置更新接受消息给所述 UE。
S150、 基站将步骤 S145中的切换完成消息转发给 MSC。
S155、 UE向 MSC发送连接管理业务请求( CM Serivce Request )。
S160、 MSC向 UE发送鉴权请求 (Authenticate Request)。
本步骤 S160也可以不执行, 即: 所述 MSC不向所述 UE发送鉴权请求消息。
S165、 UE向 MSC发送鉴权响应 (Authenticate Response)。
S170、 MSC向基站发送安全模式命令 (Security mode command), 携带完整 生保护信息、 (Integrity Protection Information)和 /或力口密信息、 (Encryption Information) , 以便基站发送安全模式命令给 UE。
本步骤 S170也可以不执行, 即: 所述 MSC不向所述基站发送安全模式命 令。
S175、 基站发送安全模式命令给 UE。 具体说来, 基站根据步骤 S170中的 安全模式命令, 执行本步骤, 或者基站在接收到 S145消息后, 执行本步骤。
S180、可选地, MSC向 UE发送连接管理业务接受命令 (CM service Accept)„ S185、 UE向 MSC发送第一 CS呼叫连接建立请求消息 (Setup), 所述第一 CS 呼叫连接建立请求消息用于请求所述 MSC为所述 CSFB生成第一会话。 或者, 所述第一 CS呼叫连接建立请求消息用于请求所述 MSC为所述 CSFB生成所述 第三会话。
S190、 MSC接收到所述第一 CS呼叫连接建立请求消息后, 如果所述第一 CS呼叫连接建立请求消息用于请求所述 MSC为所述 CSFB生成第一会话,向所 述 UE发送第一会话释放消息, 所述第一会话释放消息用于请求所述 UE释放所 述 UE在从所述 LTE网络切换到所述 2G或 3G网络的 CS域过程中生成的所述第 三会话。
如果所述第一 CS呼叫连接建立请求消息用于请求所述 MSC为所述 CSFB 生成第三会话, MSC不需要向所述 UE发送第一会话释放消息。
5195、 MSC进行呼叫对端处理。
5196、 MSC发送振铃 (Alerting)消息给 UE。 UE等待对端应答消息。
进一步, 被叫摘机, 进入通话状态。
S198、 MSC发送另一通知消息给所述 UE , 用于指示所述 UE的注册 PLMN(Registed PLMN, RPLMN)为 LTE网络的 PLMN标识。
具体说来, 所述另一通知消息携带位置区标识 LAI, 其中所述位置区标识 中 PLMN信息为 LTE网络的 PLMN信息, 用于指示所述 UE的注册 PLMN(Registed PLMN, RPLMN)为 LTE网络的 PLMN标识, 或者, 所述另一通 知消息携带 LTE网络的 PLMN信息, 用于指示所述 UE的注册 PLMN(Registed PLMN, RPLMN)为 LTE网络的 PLMN标识。
可选地, 所述另一通知消息携带携带等价 PLMN ( Equivalent PLMN, EPLMN ) 列表给 UE。
具体说来,所述另一通知消息可以为 TMSI重分配消息( TMSI Reallocation Request, Temporary Mobile Subscriber Identities Reallocation Request )给 UE, 所 述 TMSI重分配消息携带位置区标识 LAI ,其中所述位置区标识中 PLMN信息为 LTE网络的 PLMN信息, 用于指示所述 UE的注册 PLMN(Registed PLMN, RPLMN)为 LTE网络的 PLMN标识。
可选地, 所述 TMSI重分配携带等价 PLMN ( Equivalent PLMN, EPLMN ) 列表, 其中等价 PLMN包括 LTE网络的 PLMN标识。
注意, S198可以在收到 S150步骤消息之后任何时刻发送。
其中, UE在联合附着的时候, MME在发送位置更新消息中将 LTE网络的
PLMN信息带给 MSC的, 从而 MSC获知所述 LTE网络的 PLMN信息。
S199、 UE根据所述 PLMN的标识, 选择要返回到的 LTE网络。
当呼叫结束后, 由于该呼叫是由 CSFB触发的, UE完成呼叫后需要回到 LTE网络。 基站根据第三切换请求消息, 确定该呼叫是由 CSFB触发的, 所述 2G或 3G网络的基站在接收到所述 MSC发送的呼叫释放消息后, 所述 2G或 3G 网络的基站将所述 UE重定向到所述 LTE网络, 或者, 所述基站将所述 UE切换 到所述 LTE网络, 所述呼叫释放消息为释放命令 Iu Release Command或清除命 令 Clear Command。
此时, UE注册 PLMN(Registed PLMN, RPLMN)为 LTE网络的 PLMN标识, 所以当 UE返回 LTE网络时, UE会优先驻扎在所述 LTE PLMN。 其中, 2G或 3G 网络的基站发送重定向消息 (RRC Release with Redirection或者 RRC Release)指 示 UE返回 LTE网络。
具体说来, 如果所述通知消息携带位置区标识 LAI, 其中所述位置区标识 中 PLMN信息为 LTE网络的 PLMN信息, 或者, 所述通知消息携带 LTE网络的 PLMN信息,则所述 UE认为当前注册 PLMN(Registed PLMN, RPLMN)为 LTE网 络的 PLMN标识。
需要说明的是, 本实施例中, 基站可以解析 UE和 MSC之间的 CS信令。 基 站接收 UE发送给 MSC的信令消息, 例如连接管理业务请求、 鉴权响应、 第一 CS呼叫连接建立请求消息等信令消息。 基站可以使用在 LTE网络到 2G或 3G网 络的 CS域的切换过程中建立的连接将该信令消息发送给 MSC , 或者使用直传 消息将该信令消息发送给 MSC。
在图 1中, 在 CSFB过程中, 所述 MSC发送另一通知消息给所述 UE, 所述 另一通知消息携带位置区标识 LAI,所述 LAI中包含所述 LTE网络的 PLMN标识. 以便所述 UE根据所述 PLMN的标识, 从而优先返回到所述 LTE网络。 参阅图 2,图 2为本发明实施例中网络切换选过程及网络切换后的被动呼叫 过程和被叫过程后回到 LTE网络的过程:
S0b-S0c: MSC发送 CS寻呼请求给 MME, MME触发寻呼过程。
步骤 S200-S250和图 1中的步骤 S100-S150相同, 在此不再赘述。
S255、 UE向 MSC发送寻呼响应。
S260、 MSC向 UE发送鉴权请求。
本步骤 S260也可以不执行, 即: 所述 MSC不向所述 UE发送鉴权请求消息。 S265、 UE向 MSC发送鉴权响应。
S270、 MSC向基站发送安全模式命令, 携带完整性保护信息 (Integrity Protection Information)和 /或力口密信息 (Encryption Information) ,以 1¾ ^站发送安 全模式命令给 UE。
本步骤 S270也可以不执行, 即: 所述 MSC不向所述基站发送安全模式命 令。
S275、 基站发送安全模式命令给 UE。 具体说来, 基站根据步骤 S270中的 安全模式命令, 执行本步骤, 或者基站在接收到 S245消息后, 执行本步骤。
S280、 MSC向 UE发送第二 CS呼叫连接建立请求消息,所述第二 CS呼叫连 接建立请求消息用于请求所述 UE为所述 CSFB生成第二会话。 或者, 所述第二 CS呼叫连接建立请求消息用于请求所述 UE为所述 CSFB生成所述第三会话。
在所述 UE接收移动交换中心 MSC发送的第二 CS呼叫连接建立请求消息 的步骤之后, 还包括:
所述 UE使用所述资源接收或发送所述第二会话的会话数据。 S285、 MSC接收 UE发送的呼叫确认消息。
S290、 如果所述第二 CS呼叫连接建立请求消息用于请求所述 UE为所述 CSFB生成第二会话, MSC向 UE发送第二会话释放消息, 所述第二会话释放消 CS域过程中生成的第三会话。
如果所述第二 CS呼叫连接建立请求消息用于请求所述 UE为所述 CSFB生 成所述第三会话, MSC不需要向所述 UE发送第二会话释放消息。
所述 UE接收所述 MSC发送的会话释放消息。
S295、 MSC向 UE发送振铃 (Alerting)消息。 UE进入通话状态。
S296, MSC触发对端振铃。
S298、 MSC发送另一通知消息给所述 UE , 用于指示所述 UE的注册 PLMN(Registed PLMN, RPLMN)为 LTE网络的 PLMN标识。
具体说来, 所述另一通知消息携带位置区标识 LAI, 其中所述位置区标识 中 PLMN信息为 LTE网络的 PLMN信息, 用于指示所述 UE的注册 PLMN(Registed PLMN, RPLMN)为 LTE网络的 PLMN标识, 或者, 所述另一通 知消息携带 LTE网络的 PLMN信息, 用于指示所述 UE的注册 PLMN(Registed PLMN, RPLMN)为 LTE网络的 PLMN标识。
可选地, 所述另一通知消息携带携带等价 PLMN ( Equivalent PLMN , EPLMN ) 列表给 UE。
具体说来,所述另一通知消息可以为 TMSI重分配消息( TMSI Reallocation
Request, Temporary Mobile Subscriber Identities Reallocation Request )给 UE, 所 述 TMSI重分配消息携带位置区标识 LAI ,其中所述位置区标识中 PLMN信息为 LTE网络的 PLMN信息, 用于指示所述 UE的注册 PLMN(Registed PLMN, RPLMN)为 LTE网络的 PLMN标识。
可选地, 所述 TMSI重分配消息携带携带等价 PLMN ( Equivalent PLMN,
EPLMN ) 列表给 UE, 其中等价 PLMN包括 LTE网络的 PLMN标识。
注意, S298可以在收到 S250步骤消息之后任何时刻发送。
其中, UE在联合附着的时候, MME在发送位置更新消息中将 LTE网络的 PLMN信息带给 MSC的, 从而 MSC获知所述 LTE网络的 PLMN信息。
S299、 UE根据所述 PLMN的标识, 选择要返回到的 LTE网络。
当呼叫结束后, 由于该呼叫是由 CSFB触发的, UE完成呼叫后需要回到
LTE网络。 基站根据第三切换请求消息, 确定该呼叫是由 CSFB触发的, 因此, 所述 2G或 3G网络的基站在接收到所述 MSC发送的呼叫释放消息后,所述 2G或
3G网络的基站将所述 UE重定向到所述 LTE网络, 或者, 所述基站将所述 UE切 换到所述 LTE网络,所述呼叫释放消息为释放命令 Iu Release Command或清除 命令 Clear Command。
此时, UE注册 PLMN(Registed PLMN, RPLMN)为 LTE网络的 PLMN标识, 所以当 UE返回 LTE网络时, UE会优先驻扎在所述 LTE PLMN。 其中, 2G或 3G 网络的基站发送重定向消息 (RRC Release with Redirection或者 RRC Release)指 示 UE返回 LTE网络。
具体说来, 如果所述另一通知消息携带位置区标识 LAI, 其中所述位置区 标识中 PLMN信息为 LTE网络的 PLMN信息,或者,所述另一通知消息携带 LTE 网络的 PLMN信息, 则所述 UE认为当前注册 PLMN(Registed PLMN, RPLMN) 为 LTE网络的 PLMN标识。
在图 2中, 在 CSFB过程中, 所述 MSC发送另一通知消息给所述 UE, 所述 另一通知消息携带位置区标识 LAI,所述 LAI中包含所述 LTE网络的 PLMN标识. 以便所述 UE根据所述 PLMN的标识, 从而优先返回到所述 LTE网络。 参阅图 3 , 图 3为本发明实施例中 UE通过从 LTE网络切换到 2G或 3G网络的 实现的回落过程及切换后的主动呼叫过程和主叫过程后回到 LTE网络的过程: 其中, 步骤 H100和 HlOOa与图 1中的步骤 S100和 S100相同,此处不再赘述。
H105、 MME根据所述扩展业务请求, 向演进基站 eNB发送第一通知消息, 所述第一通知消息用于指示所述演进基站 eNB为所述 CSFB将所述 UE从 LTE网 络移动到 2G或 3G网络, 也就是, 第一通知消息用于指示所述 eNB为所述 CSFB 所述 UE应当被移动到 2G或 3G网络。
H110和 H115与图 1中的步骤 S110和 S115相同, 此处不再赘述。 H120、 MME向 SGSN发送从 PS到 PS的切换请求消息, 所述从 PS到 PS的切 换请求消息用于请求所述 SGSN发起从所述 LTE网络到所述 2G或 3G网络的分 组交换 PS域的切换。
步骤 H120为可选步骤, 在网络准备将 UE从 LTE网络切换到 CS域时, 可以 也切换到 PS域, 也可以不切换到 PS域。
H121、 MSC向 2G或 3G网络的基站( BSC或者 RNC )发送第二切换请求消 息, 所述第二切换请求消息用于请求所述基站将所述 UE从 LTE网络切换到 2G 或 3G网络的 CS域。
H125、 基站向 MSC发送第二切换请求确认消息, 所述第二切换请求确认 消息包含无线接入承载 RAB , 所述 UE使用所述 RAB为所述 CSFB而从所述 LTE 网络切换到所述 2G或 3G网络的 PS域。
H130、 MSC向 MME发送第一切换请求响应消息, 所述第一切换请求响应 消息中包含所述 RAB。
H135a、 MME向 eNB发送切换要求响应, 所述切换要求响应令中包含所述 RAB。
HI 35b、 eNB向 UE发送切换命令, 所述切换命令中包含所述 RAB。
可选地, 在 eNB向所述 UE发送所述切换命令之前, eNB确定所述 UE支持 从所述 LTE网络到所述 2G或 3G网络的 PS域的切换。
H140、 UE根据切换命令中包含的所述 RAB , 为所述 CSFB从所述 LTE网络 切换到所述 2G或 3G网络的 PS域。
H145、 UE切换完成后, 向基站发送切换完成消息 ( HO Complete )。
可选地, 基站接收到切换完成消息后, 可以使用在步骤 H125中生成的 CS RAB。 当步骤 H125中没有生成 CS RAB时, 基站可以建立一个新 CS RAB。
H150、 基站将步骤 S145中的切换完成消息转发给 MSC。
H155-H185与图 1中的步骤 S155和 S185相同, 此处不再赘述。
H185a、 MSC发送呼叫处理中(call proceeding)消息给 UE。
H190、 基站向 UE发送第二通知消息。
UE可以向基站发送第二通知响应消息。 为了与 UE的现有处理流程最大限度匹配, 减少异常, 避免呼叫失败, 在 所述基站接收所述 UE发送的呼叫建立消息或者所述 MSC发送的呼叫处理中消 息后, 所述基站向所述 UE发送第二通知消息, 所述第二通知消息包含所述基 站为所述 UE分配的 CSRAB , 如在步骤 H125中描述的 CS RAB或者步骤 H145a 中描述的 CS RAB。 所述第二通知消息可以为无线承载建立或者无线承载重配 置消息。 UE可以使用 CS RAB进行语音通话。
所述基站也可以在接收到 MSC发送的第三通知消息后发送所述第二通知 消息。 所述 MSC接收到至少一条下列消息之后发送第二通知消息给所述基站, 所述第二通知消息用于请求所述基站为所述 UE分配 CS域资源。
其中, 所述下列消息包括: 所述基站发送的切换完成消息, 所述 UE发送 的连接管理业务请求消息, 所述 UE发送的所述第一 CS呼叫连接请求消息。
H195、 MSC发送振铃 (Alerting)消息给 UE。 UE等待对端应答消息。
被叫摘机后, 主被叫进入通话状态。
UE摘机, 进入通话状态。
H198、 MSC发送第三通知消息给所述 UE , 用于指示所述 UE的注册
PLMN(Registed PLMN, RPLMN)为 LTE网络的 PLMN标识。
具体说来, 所述第三通知消息携带位置区标识 LAI, 其中所述位置区标识 中 PLMN信息为 LTE网络的 PLMN信息, 用于指示所述 UE的注册 PLMN(Registed PLMN, RPLMN)为 LTE网络的 PLMN标识, 或者, 所述第三通 知消息携带 LTE网络的 PLMN信息, 用于指示所述 UE的注册 PLMN(Registed PLMN, RPLMN)为 LTE网络的 PLMN标识。
可选地, 所述第三通知消息携带携带等价 PLMN ( Equivalent PLMN, EPLMN ) 列表给 UE。
具体说来,所述第三通知消息可以为 TMSI重分配消息( TMSI Reallocation Request, Temporary Mobile Subscriber Identities Reallocation Request )给 UE, 所 述 TMSI重分配消息携带位置区标识 LAI ,其中所述位置区标识中 PLMN信息为 LTE网络的 PLMN信息, 用于指示所述 UE的注册 PLMN(Registed PLMN, RPLMN)为 LTE网络的 PLMN标识。 可选地, 所述 TMSI重分配消息携带携带等价 PLMN ( Equivalent PLMN, EPLMN ) 列表给 UE, 其中等价 PLMN包括 LTE网络的 PLMN标识。
注意, H198可以在收到 H150步骤消息之后任何时刻发送。
其中, UE在联合附着的时候, MME在发送位置更新消息中将 LTE网络的 PLMN信息带给 MSC的, 从而 MSC获知所述 LTE网络的 PLMN信息。
H199、 UE根据所述 PLMN的标识, 选择要返回到的 LTE网络。
此时, UE注册 PLMN(Registed PLMN, RPLMN)为 LTE网络的 PLMN标识, 所以当 UE返回 LTE网络时, UE会优先驻扎在所述 LTE PLMN。 其中, 2G或 3G 网络的基站发送重定向消息 (RRC Release with Redirection或者 RRC Release)指 示 UE返回 LTE网络。
在图 3中, 在 CSFB过程中, 所述 MSC发送第三通知消息给所述 UE, 所述 第三通知消息携带位置区标识 LAI,所述 LAI中包含所述 LTE网络的 PLMN标识. 以便所述 UE根据所述 PLMN的标识, 从而优先返回到所述 LTE网络。 参阅图 4,图 4为本发明实施例中网络切换选过程及网络切换后的被动呼叫 过程和被叫过程后回到 LTE网络的过程:
H0b-H0c: MSC发送 CS寻呼请求给 MME, MME触发寻呼过程。 步骤 H200-H250和图 3中的步骤 H100-H150相同, 在此不再赘述。
H255、 UE向 MSC发送寻呼响应。
H260、 可选地, MSC向 UE发送鉴权请求。
H265、 可选地, UE向 MSC发送鉴权响应。
H270、 MSC向基站发送安全模式命令, 携带完整性保护信息 (Integrity Protection Information)和 /或力口密信息 (Encryption Information) ,以 1¾ ^站发送安 全模式命令给 UE。
本步骤 H270也可以不执行, 即: 所述 MSC不向所述基站发送安全模式命 令。
H275、 基站发送安全模式命令给 UE。 具体说来, 基站根据步骤 H270中的 安全模式命令, 执行本步骤, 或者基站在接收到 H245消息后, 执行本步骤。 H280、 MSC向 UE发送第二 CS呼叫连接建立请求消息, 所述第二 CS呼叫 连接建立请求消息用于请求所述 UE生成第二会话。
注意, 除了 CS呼叫之外, MSC还可以在 2G/3G网络向 UE发起 CS补充业务 请求, 比: ¾口定位业务请求,或者 USSD ( UnstmcturedSupplementaryServiceData, 非结构化补充数据业务业务请求。 也就是说, UE从 LTE网络执行电路回退可 以是因为 MSC要在 2G或 3G网络发起 CS呼叫或者发起 CS补充业务请求。
H285、 MSC接收 UE发送的呼叫确认消息。
H290、基站向 UE发送第二通知消息。 UE可以向基站发送第二通知响应消 息。
为了与 UE的现有处理流程最大限度匹配, 减少异常, 避免呼叫失败, 在 所述基站接收所述 MSC发送的呼叫建立消息或者所述 UE发送的呼叫确认消息 后, 所述基站向所述 UE发送第二通知消息, 所述第二通知消息包含所述基站 为所述 UE分配的 CSRAB, 如在步骤 H225中描述的 CS RAB或者步骤 H245a中 描述的 CS RAB。 所述第二通知消息可以为无线承载建立或者无线承载重配置 消息。 UE可以使用 CS RAB进行语音通话。
所述基站也可以在接收到 MSC发送的第三通知消息后发送所述第二通知 消息。 所述 MSC接收到至少一条下列消息之后发送第二通知消息给所述基站, 所述第二通知消息用于请求所述基站为所述 UE分配 CS域资源。
其中, 所述下列消息包括: 所述基站发送的切换完成消息, 所述 UE发送 的寻呼响应, 所述 MSC发送的所述第二 CS呼叫连接请求消息。
H295、 MSC向 UE发送振铃 (Alerting)消息。
UE摘机, 进入通话状态。
H298、 MSC发送第三通知消息给所述 UE , 用于指示所述 UE的注册 PLMN(Registed PLMN, RPLMN)为 LTE网络的 PLMN标识。
具体说来, 所述第三通知消息携带位置区标识 LAI, 其中所述位置区标识 中 PLMN信息为 LTE网络的 PLMN信息, 用于指示所述 UE的注册 PLMN(Registed PLMN, RPLMN)为 LTE网络的 PLMN标识, 或者, 所述第三通 知消息携带 LTE网络的 PLMN信息, 用于指示所述 UE的注册 PLMN(Registed PLMN, RPLMN)为 LTE网络的 PLMN标识。
可选地, 所述第三通知消息携带携带等价 PLMN ( Equivalent PLMN, EPLMN ) 列表给 UE。
具体说来,所述第三通知消息可以为 TMSI重分配消息( TMSI Reallocation
Request, Temporary Mobile Subscriber Identities Reallocation Request )给 UE, 所 述 TMSI重分配消息携带位置区标识 LAI ,其中所述位置区标识中 PLMN信息为 LTE网络的 PLMN信息, 用于指示所述 UE的注册 PLMN(Registed PLMN, RPLMN)为 LTE网络的 PLMN标识。
可选地, 所述 TMSI重分配消息携带携带等价 PLMN ( Equivalent PLMN,
EPLMN ) 列表给 UE, 其中等价 PLMN包括 LTE网络的 PLMN标识。
注意, H298可以在收到 H250步骤消息之后任何时刻发送。
其中, UE在联合附着的时候, MME在发送位置更新消息中将 LTE网络的 PLMN信息带给 MSC的, 从而 MSC获知所述 LTE网络的 PLMN信息。
H299、 UE根据所述 PLMN的标识, 选择要返回到的 LTE网络。
此时, UE注册 PLMN(Registed PLMN, RPLMN)为 LTE网络的 PLMN标识, 所以当 UE返回 LTE网络时, UE会优先驻扎在所述 LTE PLMN。 其中, 2G或 3G 网络的基站发送重定向消息 (RRC Release with Redirection或者 RRC Release)指 示 UE返回 LTE网络。
具体说来, 如果所述通知消息携带位置区标识 LAI, 其中所述位置区标识 中 PLMN信息为 LTE网络的 PLMN信息, 或者, 所述通知消息携带 LTE网络的 PLMN信息,则所述 UE认为当前注册 PLMN(Registed PLMN, RPLMN)为 LTE网 络的 PLMN标识。
在图 4中, 在 CSFB过程中, 所述 MSC发送第三通知消息给所述 UE, 所述 第三通知消息携带位置区标识 LAI,所述 LAI中包含所述 LTE网络的 PLMN标识 : 以便所述 UE根据所述 PLMN的标识, 从而优先返回到所述 LTE网络。
参阅图 5, 本发明实施例提供的选择 LTE网络的方法的一个实施例包括: 101、 移动交换中心 MSC接收移动管理实体 MME发送的第一切换请求消 息, 所述第一切换请求消息用于请求所述 MSC为电路域回落 CSFB将用户设备 UE从长期演进 LTE网络切换到第二代 2G或第三代 3G网络的电路交换 CS域。
102、所述 MSC接收切换完成消息,所述切换完成消息指示所述 UE已经完 成从所述 LTE网络到所述 2G或 3G网络的 CS域的切换。
103、 所述 MSC发送通知消息给所述 UE, 所述通知消息携带位置区标识
LAI, 所述 LAI中包含所述 LTE网络的 PLMN标识, 所述 LTE网络的 PLMN标识 用于指示所述 UE根据所述 LTE网络的 PLMN标识选择要返回到的 LTE网络。
所述通知消息为 TMSI重分配消息。 见图 1-图 4所对应的实施例中的描述, 此处不再赘述。
参阅图 6, 本发明实施例提供的选择 LTE网络的方法的另一实施例包括: 201、位于长期演进 LTE网络的用户设备 UE向移动管理实体 MME发送请求 消息, 所述请求消息用于请求电路域回落 CSFB。
202、 所述 UE接收演进基站 eNodeB发送的切换命令, 所述切换命令用于 指示所述 UE为所述 CSFB从所述 LTE网络切换到 2G或 3G网络的电路交换 CS 域。
203、 根据所述切换命令, 所述 UE从所述 LTE网络切换到所述 2G或 3G网 络的 CS域。
204、所述 UE接收所述 MSC发送的通知消息,所述通知消息包含位置区标 识 LAI, 所述 LAI包含所述 LTE网络的 PLMN标识。
所述 UE根据所述 PLMN的标识, 选择要返回到的 LTE网络。
所述 UE接收所述 2G或 3G网络的基站发送的重定向消息或者空口连接释 放消息, 所述重定向消息或者空口连接释放消息触发所述 UE根据所述 PLMN 的标识选择要返回到的 LTE网络。
所述通知消息为 TMSI重分配消息。
本实施例中用户设备的上述处理步骤以及其他处理步骤的详细描述,可以 参见图 1-图 4所对应的实施例中的描述, 此处不再赘述。
参阅图 7, 本发明实施例提供的移动交换中心 MSC80包括: 接收单元 801、 生成单元 802和发送单元 803。
接收单元 801 ,用于接收移动管理实体 MME发送的第一切换请求消息和切 换完成消息, 所述第一切换请求消息用于请求所述 MSC为电路域回落 CSFB将 用户设备 UE从长期演进 LTE网络切换到第二代 2G或第三代 3G网络的电路交 换 CS域, 所述切换完成消息指示所述 UE已经完成从所述 LTE网络到所述 2G或 3G网络的 CS域的切换。
生成单元 802,用于根据所述接收单元 801接收的所述切换完成消息生成通 知消息, 所述通知消息携带位置区标识 LAI, 所述 LAI中包含所述 LTE网络的 PLMN标识, 所述 LTE网络的 PLMN标识用于指示所述 UE根据所述 LTE网络的 PLMN标识选择要返回到的 LTE网络源。
发送单元 803, 用于发送所述生成单元 802生成的所述通知消息。
所述通知消息为 TMSI重分配消息;
所述通知消息携带等价 PLMN列表, 其中所述等价 PLMN列表包括所述 LTE网络的 PLMN标识。
本实施例中的 MSC可以执行图 1-图 5方法实施例中描述的 MSC的方法步 骤, 接收单元 801用于接收其他实体发送到 MSC的消息, 发送单元 803用于向
参阅图 8, 本发明实施例提供的用户设备 90包括: 发送单元 901、接收单元 902、 切换单元 903和选择单元 904。
发送单元 901 , 用于向移动管理实体 MME发送请求消息, 所述请求消息用 于请求电路域回落 CSFB。
接收单元 902, 用于接收演进基站 eNodeB发送的切换命令, 所述切换命令 用于指示所述 UE为所述 CSFB从所述 LTE网络切换到 2G或 3G网络的电路交换 CS域。
切换单元 903 , 用于根据所述接收单元 901接收的所述切换命令, 从所述 LTE网络切换到所述 2G或 3G网络的 CS域。
所述接收单元 902, 还用于接收所述 MSC发送的通知消息, 所述通知消息 包含位置区标识 LAI , 所述 LAI包含所述 LTE网络的 PLMN标识。
选择单元 904, 用于根据所述接收单元 902接收的所述 PLMN的标识, 选择 要返回到的 LTE网络。
所述接收单元 902,还用于接收所述 2G或 3G网络的基站发送的重定向消息 或者空口连接释放消息,所述重定向消息或者空口连接释放消息触发所述选择 单元 904根据所述接收单元 902接收的所述 PLMN的标识选择要返回到的 LTE 网络。
本实施例中的 UE可以执行图 1-图 4和图 6方法实施例中描述的 UE的方法步 骤, 接收单元 902用于接收其他实体发送到 UE的消息, 发送单元 901用于向其
通过本发明提供的上述装置实施例, 在 CSFB过程中, 所述 MSC发送通知 消息给所述 UE, 所述通知消息携带位置区标识 LAI, 所述 LAI中包含所述 LTE 网络的 PLMN标识, 以便所述 UE根据所述 PLMN的标识, 优先返回到所述 LTE 网络。
本领域技术人员能够理解,上述图 7和图 8的实施例中,用于发送消息的发 送单元可以采用发送器实现, 用于接收消息的接收单元可以采用接收器实现。 或者, 发送单元和接收单元都可以采用收发器实现。 在物理实现上, 发送器或 者收发器可以用一个物理实体实现,也可采用多个物理实体实现,发送器和收 发器可以采用一个物理实体实现,也可以采用多个物理实体实现,本发明对此 不做限制。 其他单元, 如生成单元、 分配单元、 重定向单元、 切换单元、 确定 单元等单元可以采用一个或多个处理器实现, 本发明对此不做限制。
参阅图 9, 本发明实施例提供的选择 LTE网络的系统的一实施例包括: 移 动管理实体 60、 演进基站 70、 移动交换中心 80、 基站 100和用户设备 90;
移动管理实体 60、 演进基站 70、 移动交换中心 80、 基站 100和用户设备 90 各自执行的动作以及它们之间的交互, 可以参见图 1-图 4的描述, 以及图 5至图 8的方法实施例和装置实施例的描述, 此处不再赘述。 本领域普通技术人员可以意识到,结合本文中所公开的实施例描述的各示 例的单元及算法步骤, 能够以电子硬件、 计算机软件或者二者的结合来实现, 为了清楚地说明硬件和软件的可互换性,在上述说明中已经按照功能一般性地 描述了各示例的组成及步骤。这些功能究竟以硬件还是软件方式来执行,取决 于技术方案的特定应用和设计约束条件。专业技术人员可以对每个特定的应用 来使用不同方法来实现所描述的功能,但是这种实现不应认为超出本发明的范 围。 所属领域的技术人员可以清楚地了解到,为了描述的方便和筒洁,上述描 述的系统、装置和单元的具体工作过程,可以参考前述方法实施例中的对应过 程, 在此不再赘述。 在本申请所提供的几个实施例中, 应该理解到, 所揭露的系统、装置和方 法, 可以通过其它的方式实现。 例如, 以上所描述的装置实施例仅仅是示意性 的, 例如, 所述单元的划分, 仅仅为一种逻辑功能划分, 实际实现时可以有另 外的划分方式,例如多个单元或组件可以结合或者可以集成到另一个系统,或 一些特征可以忽略, 或不执行。 另外, 所显示或讨论的相互之间的耦合或直接 耦合或通信连接可以是通过一些接口、装置或单元的间接耦合或通信连接,也 可以是电的, 机械的或其它的形式连接。 所述作为分离部件说明的单元可以是或者也可以不是物理上分开的,作为 单元显示的部件可以是或者也可以不是物理单元, 即可以位于一个地方,或者 也可以分布到多个网络单元上。可以根据实际的需要选择其中的部分或者全部 单元来实现本发明实施例方案的目的。 另外, 在本发明各个实施例中的各功能单元可以集成在一个处理单元中, 也可以是各个单元单独物理存在,也可以是两个或两个以上单元集成在一个单 元中。上述集成的单元既可以采用硬件的形式实现,也可以采用软件功能单元 的形式实现。 所述集成的单元如果以软件功能单元的形式实现并作为独立的产品销售 或使用时, 可以存储在一个计算机可读取存储介质中。基于这样的理解, 本发 明的技术方案本质上或者说对现有技术做出贡献的部分,或者该技术方案的全 部或部分可以以软件产品的形式体现出来,该计算机软件产品存储在一个存储 介质中,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所述方法的全部或部分步骤。而前述 的存储介质包括: U盘、 移动硬盘、 只读存储器(ROM, Read-Only Memory )、 随机存取存储器(RAM, Random Access Memory ), 磁碟或者光盘等各种可以 存储程序代码的介质。 本发明中所提到的 LTE网络, 包括 LTE A网络、 以及后续可能出现 LTE版 本。 以上所述,仅为本发明的具体实施方式,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 各种等效的修改或替换, 这些修改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以权利要求的保护范围为准。

Claims

权 利 要 求
1、 一种选择 LTE网络的方法, 其特征在于, 包括:
移动交换中心 MSC接收移动管理实体 MME发送的第一切换请求消息, 所 述第一切换请求消息用于请求所述 MSC为电路域回落 CSFB将用户设备 UE从 长期演进 LTE网络切换到第二代 2G或第三代 3G网络的电路交换 CS域;
所述 MSC接收切换完成消息, 所述切换完成消息指示所述 UE已经完成从 所述 LTE网络到所述 2G或 3G网络的 CS域的切换;
所述 MSC发送通知消息给所述 UE, 所述通知消息携带位置区标识 LAI, 所述 LAI中包含所述 LTE网络的 PLMN标识, 所述 LTE网络的 PLMN标识用于指 示所述 UE根据所述 LTE网络的 PLMN标识选择要返回到的 LTE网络。
2、 根据权利要求 1所述的方法, 其特征在于,
所述通知消息为 TMSI重分配消息。
3、 一种选择 LTE网络的方法, 其特征在于, 包括:
位于长期演进 LTE网络的用户设备 UE向移动管理实体 MME发送请求消 息, 所述请求消息用于请求电路域回落 CSFB;
所述 UE接收演进基站 eNodeB发送的切换命令, 所述切换命令用于指示所 述 UE为所述 CSFB从所述 LTE网络切换到 2G或 3G网络的电路交换 CS域;
根据所述切换命令,所述 UE从所述 LTE网络切换到所述 2G或 3G网络的 CS 域;
所述 UE接收所述 MSC发送的通知消息, 所述通知消息包含位置区标识 LAI , 所述 LAI包含所述 LTE网络的 PLMN标识;
所述 UE根据所述 PLMN的标识, 选择要返回到的 LTE网络。
4、 根据权利要求 3所述的方法, 其特征在于, 所述方法还包括: 所述 UE接收所述 2G或 3G网络的基站发送的重定向消息或者空口连接释 放消息, 所述重定向消息或者空口连接释放消息触发所述 UE根据所述 PLMN 的标识选择要返回到的 LTE网络。
5、 根据权利要求 3或 4所述的方法, 其特征在于, 所述通知消息为 TMSI重分配消息。
6、 一种移动交换中心 MSC, 其特征在于, 包括:
接收单元, 用于接收移动管理实体 MME发送的第一切换请求消息和切换 完成消息, 所述第一切换请求消息用于请求所述 MSC为电路域回落 CSFB将用 户设备 UE从长期演进 LTE网络切换到第二代 2G或第三代 3G网络的电路交换 CS域,所述切换完成消息指示所述 UE已经完成从所述 LTE网络到所述 2G或 3G 网络的 CS域的切换;
生成单元, 用于根据所述接收单元接收的所述切换完成消息生成通知消 息, 所述通知消息携带位置区标识 LAI, 所述 LAI中包含所述 LTE网络的 PLMN 标识, 所述 LTE网络的 PLMN标识用于指示所述 UE根据所述 LTE网络的 PLMN 标识选择要返回到的 LTE网络;
发送单元, 用于发送所述生成单元生成的所述通知消息。
7、 根据权利要求 6所述的移动交换中心, 其特征在于,
所述通知消息为 TMSI重分配消息。
8、 一种用户设备 UE, 其特征在于, 包括:
发送单元, 用于向移动管理实体 MME发送请求消息, 所述请求消息用于 请求电路域回落 CSFB;
接收单元, 用于接收演进基站 eNodeB发送的切换命令, 所述切换命令用 于指示所述 UE为所述 CSFB从所述 LTE网络切换到 2G或 3G网络的电路交换 CS 域;
切换单元, 用于根据所述接收单元接收的所述切换命令, 从所述 LTE网络 切换到所述 2G或 3G网络的 CS域;
所述接收单元, 还用于接收所述 MSC发送的通知消息, 所述通知消息包 含位置区标识 LAI, 所述 LAI包含所述 LTE网络的 PLMN标识;
选择单元, 用于根据所述接收单元接收的所述 PLMN的标识, 选择要返回 到的 LTE网络。
9、 根据权利要求 8所述的用户设备, 其特征在于,
所述接收单元, 还用于接收所述 2G或 3G网络的基站发送的重定向消息或 者空口连接释放消息,所述重定向消息或者空口连接释放消息触发所述选择单 元根据所述接收单元接收的所述 PLMN的标识选择要返回到的 LTE网络。
PCT/CN2013/091081 2013-12-31 2013-12-31 一种选择lte网络的方法、设备及系统 WO2015100606A1 (zh)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN201380002743.6A CN105009639A (zh) 2013-12-31 2013-12-31 一种选择lte网络的方法、设备及系统
PCT/CN2013/091081 WO2015100606A1 (zh) 2013-12-31 2013-12-31 一种选择lte网络的方法、设备及系统

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2013/091081 WO2015100606A1 (zh) 2013-12-31 2013-12-31 一种选择lte网络的方法、设备及系统

Publications (1)

Publication Number Publication Date
WO2015100606A1 true WO2015100606A1 (zh) 2015-07-09

Family

ID=53492958

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2013/091081 WO2015100606A1 (zh) 2013-12-31 2013-12-31 一种选择lte网络的方法、设备及系统

Country Status (2)

Country Link
CN (1) CN105009639A (zh)
WO (1) WO2015100606A1 (zh)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108770013A (zh) * 2018-06-26 2018-11-06 中国联合网络通信集团有限公司 网络监控方法及装置

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101662806A (zh) * 2009-08-18 2010-03-03 华为技术有限公司 业务控制和处理方法、移动性管理实体以及用户设备
WO2011127657A1 (zh) * 2010-04-14 2011-10-20 华为技术有限公司 电路交换域业务返回传统网络的方法和移动管理网元
CN103402232A (zh) * 2013-06-29 2013-11-20 华为终端有限公司 重回归属网络的方法及设备

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101662806A (zh) * 2009-08-18 2010-03-03 华为技术有限公司 业务控制和处理方法、移动性管理实体以及用户设备
WO2011127657A1 (zh) * 2010-04-14 2011-10-20 华为技术有限公司 电路交换域业务返回传统网络的方法和移动管理网元
CN103402232A (zh) * 2013-06-29 2013-11-20 华为终端有限公司 重回归属网络的方法及设备

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
ERICSSON ET AL.: "Introduction of the ''Last used E-UTRAN PLMN ID", 3GPP TSG-RAN WG3 MEETING #82 R3-132259, 11 November 2013 (2013-11-11) - 15 November 2013 (2013-11-15), SAN FRANCISCO, USA, Retrieved from the Internet <URL:http://www.3gpp.org/FTP/tsg_ran/WG3_Iu/TSGR3_82/Docs/> *
HUAWEI, HISILICON: "Fast return to the last E-UTRAN PLMN for CSFB", 3GPP TSG-RAN WG3 MEETING #82 R3-132114, 20 May 2013 (2013-05-20) - 24 May 2013 (2013-05-24), FUKUOKA, JAPAN, Retrieved from the Internet <URL:http://www.3gpp.org/ftp/tsg_ran/wg2_rl2/TSGR2_82/Docs/> *
HUAWEI.: "Response to R3-131772", 3GPP TSG-RAN WG3 MEETING #81BIS R3-131890, 7 October 2013 (2013-10-07) - 11 October 2013 (2013-10-11), VENICE, ITALY, Retrieved from the Internet <URL:http://www.3gpp.org/FTP/tsg_ran/WG3_Iu/TSGR3_81bis/Docs/> *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108770013A (zh) * 2018-06-26 2018-11-06 中国联合网络通信集团有限公司 网络监控方法及装置

Also Published As

Publication number Publication date
CN105009639A (zh) 2015-10-28

Similar Documents

Publication Publication Date Title
EP2999265B1 (en) Method, device, and system for network handover
EP3079388B1 (en) Method and device for selecting an lte network
US10231153B2 (en) Network handover method, device, and system
US10028177B2 (en) Network handover method, device, and system
US9717028B2 (en) Network handover method, device, and system between packet-switched and circuit-switched systems
WO2014101042A1 (zh) 基于重定向的电路域回落的通信方法及通信装置
WO2015100661A1 (zh) 一种选择紧急呼叫中心的方法、设备及系统
US10187836B2 (en) Voice resource saving method, device, and system
WO2016041208A1 (zh) 选择目标共享网络的cs域和ps域运营商的方法及相关装置
CN104380798B (zh) 一种网络切换的方法、设备及系统
CN106255092B (zh) 确定源sgsn的方法和装置
WO2015100606A1 (zh) 一种选择lte网络的方法、设备及系统
RU2663218C1 (ru) Способ передачи обслуживания между сетями, устройство и система
EP3010279A1 (en) Method, device, and system for network handover
KR20130069173A (ko) 네트워크 천이 방법, 이 방법을 수행하는 기지국 장치 및 이동 단말

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 13900848

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 13900848

Country of ref document: EP

Kind code of ref document: A1