WO2011044825A1 - 一种eps中电路交换回落业务的实现方法和*** - Google Patents

一种eps中电路交换回落业务的实现方法和*** Download PDF

Info

Publication number
WO2011044825A1
WO2011044825A1 PCT/CN2010/077585 CN2010077585W WO2011044825A1 WO 2011044825 A1 WO2011044825 A1 WO 2011044825A1 CN 2010077585 W CN2010077585 W CN 2010077585W WO 2011044825 A1 WO2011044825 A1 WO 2011044825A1
Authority
WO
WIPO (PCT)
Prior art keywords
network
msc
utran
radio access
handover
Prior art date
Application number
PCT/CN2010/077585
Other languages
English (en)
French (fr)
Inventor
陶全军
Original Assignee
中兴通讯股份有限公司
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 中兴通讯股份有限公司 filed Critical 中兴通讯股份有限公司
Priority to US14/237,095 priority Critical patent/US9706444B2/en
Publication of WO2011044825A1 publication Critical patent/WO2011044825A1/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

Definitions

  • the present invention relates to the field of mobile communications, and in particular, to a method and system for performing a Circuit Switched Fallback (CSFB) under a network access of an Evolved Packet System (EPS) network. .
  • CSFB Circuit Switched Fallback
  • EPS Evolved Packet System
  • PS Core Packet Switched Core
  • EPC Packet Switched Core
  • GERAN GSM EDGE radio access network
  • GSM Global System for Mobile Mobility management between EDGE, Enhanced Data Rate for GSM Evolution, UTRAN, Wireless Local Area Network (WLAN) and other non-3GPP access networks .
  • FIG. 1 is a structural diagram of a CS network in the prior art for implementing a CS service to fall back to the CS network.
  • the description of each entity in FIG. 1 is as follows: User Equipment (UE) 101;
  • UTRAN 102 a radio access network of a GSM/Universal Mobile Telecommunications System (UMTS) network, providing circuit domain and packet domain radio access resources;
  • UMTS Universal Mobile Telecommunications System
  • E-UTRAN 103 Evolved radio access network, which can provide higher uplink and downlink rates, lower Transmission delay and more reliable wireless transmission, E-UTRAN includes Evolved NodeB (eNodeB), which provides radio resources for terminal access; Serving GPRS Supporting Node (referred to as Serving GPRS Supporting Node, referred to as SGSN) 104; Serving Gateway (S-GW) 105, is a user plane entity, responsible for user plane data routing processing; Mobility Management Entity (MME) 106, is a control A physical entity, a server that temporarily stores user data, is responsible for managing and storing UE contexts (such as UE/user identity, mobility management state, user security parameters, etc.), assigning temporary identifiers to users, and when the UE is camped on the tracking area or the network The user is responsible for authenticating the user; the Mobile Switching Center (MSC) 107, the MSC can also be a new functional entity MSC Server in the R4 phase and thereafter, and the MSC/access is unified
  • the MME When the UE accesses the EPS network, the MME is notified to perform the joint registration, and the CSFB is supported. The MME initiates the joint registration with the MSC instead of the UE, and the MSC receives the joint registration message. If there is no user data, the home location register (Home Location) Register, referred to as HLR for short) Get user data.
  • HLR Home Location Register
  • FIG. 2 shows a call flow of a terminal in a CS network to fall back to a CS network under the access of an EPS network in the prior art.
  • the UE has been registered with the MME and the MSC in the EPS network.
  • the UE initiates the CS service.
  • the UE sends an enhanced service request message to the MME.
  • the message carries the CSFB indication.
  • the MME After receiving the enhanced service request message, the MME notifies the UE to fall back through the E-UTRAN.
  • the UTRAN network performs the CS service, and includes the following steps: Step 201:
  • the UE sends an enhanced service request to the MME, where the message carries a CSFB indication, where the CSFB indication is used to instruct the MME to perform circuit switching service fallback.
  • Step 202 The MME sends a notification CSFB message to the E-UTRAN, where the message carries a CSFB indication, to indicate that the E-UTRAN UE needs to fall back to the UTRAN network.
  • Step 203 The E-UTRAN may obtain a measurement report from the UE, and determine the UE according to the measurement report.
  • Step 205 If the UE has a data service in the EPS network, the E-UTRAN triggers the packet domain handover procedure to switch the data service to the UTRAN network, which is not described in detail in the present invention; Step 205: If the UE If there is no data service in the EPS network, the E-UTRAN notifies the UE to perform the fallback, and switches to the UTRAN network.
  • Step 206 After the handover succeeds, the UE sends a service request message to the MSC of the serving target access cell in the UTRAN network;
  • Step 209 The UE re-initiates the location update process in the UTRAN.
  • the MSC receives the authentication parameter to notify the UE to perform the authentication process.
  • Step 215 The source MSC notifies the MME. Deleting the association relationship;
  • Step 217 The source MSC returns a deletion success message to the HLR.
  • Step 218 The HLR sends an insertion user data request to the MSC.
  • Step 219 After the MSC inserts the user data successfully, the MSC returns an insertion success message to the HLR.
  • Step 220 The HLR returns a location update to the MSC.
  • Step 221 The MSC notifies the UTRAN to perform the encryption process.
  • Step 222 The MSC returns a location update response message to the UE. The foregoing steps 208-222 are performed when the MSC that the UE drops back is not the same as the jointly registered MSC.
  • Step 223 The UE initiates a call setup request to the MSC.
  • Step 224 The MSC notifies the UTRAN to establish a terrestrial circuit and a radio resource.
  • Step 225 The MSC establishes an inter-office bearer to the PSTN.
  • the E-UTRAN determines the target cell to fall back according to the radio signal quality of the UE's measurement report, and the MSC served by the target cell that cannot be guaranteed to fall back is the same MSC as the MSC that the UE is jointly registered in the EPS network access. .
  • the UE needs to additionally add steps 208-222 to initiate the call, which greatly extends the access time of the service.
  • the technical problem to be solved by the present invention is to provide a method and system for implementing a circuit switched fallback service in an EPS, which can reduce service access time.
  • the present invention provides an implementation method of a circuit switched fallback (CSFB) service in an evolved packet domain system (EPS), including: performing circuit switching after a user equipment (UE) accesses an EPS network (CS) triggers the CSFB service when the service of the network, the UE sends the CSFB to the mobility management entity (MME) The indicated CS network service request; after receiving the CS network service request that is sent by the UE and carrying the CSFB indication, the MME instructs the evolved Global System for Mobile Communications Radio Access Network (E-UTRAN) to switch the UE to the And the E-UTRAN initiates handover, and the UE is handed over to the CS network by the MME and a mobile switching center (MSC) jointly registered by the UE when accessing the EPS network.
  • E-UTRAN evolved Global System for Mobile Communications Radio Access Network
  • Switching the UE to the CS network refers to switching the UE to a radio access network of a CS network, and the radio access network of the CS network includes a Global System for Mobile Communications Radio Access Network (UTRAN) or a global mobile communication system.
  • UTRAN Global System for Mobile Communications Radio Access Network
  • GSM Global System for Mobile Communications Radio Access Network
  • GERAN Enhanced Data Rate GSM Evolution Technology Radio Access Network
  • the E-UTRAN initiates a handover, and the MME and the MSC jointly registered by the UE when accessing the EPS network to handover the UE to the CS network include: the E-UTRAN selects a target cell to be handed over, The MME sends a handover request to the MSC that is jointly registered by the UE when accessing the EPS network, and notifies the target cell that is selected to be handed over to the MSC that is jointly registered by the UE when accessing the EPS network; And the jointly registered MSC determines, according to the target cell, the radio access network of the CS network, sends a handover request to the radio access network of the CS network, indicating that there is no bearer handover, and the CS network After receiving the handover request, the radio access network allocates radio signaling resources for the handover of the UE; the radio access network of the CS network passes the access parameters of the radio signaling resource through the MSC, the MME, and the E- Transmitting to the UE by the UTRAN
  • the E-UTRAN selects a target cell according to a measurement report of the UE.
  • the method further includes: jointly registering by the UE when accessing the EPS network The MSC triggers, and indicates that the radio access network of the CS network allocates a call bearer to the UE, where the call bearer includes a ground bearer circuit and a radio bearer resource.
  • the E-UTRAN initiates a handover, and the MME and the MSC jointly registered by the UE when accessing the EPS network to handover the UE to the CS network include: the E-UTRAN selects a target cell to be handed over, The MME sends a handover request to the MSC that is jointly registered by the UE when accessing the EPS network, and notifies the target cell that is selected to be handed over to the MSC that is jointly registered by the UE when accessing the EPS network; And the jointly registered MSC determines, according to the target cell, the radio access network of the CS network, sends a handover request to the radio access network of the CS network, indicating that there is no bearer handover, and the CS network wireless
  • the step of allocating the wireless signaling resource for the handover of the UE includes: if the MSC that the UE jointly registers when accessing the EPS network determines that the target cell is not in the jurisdiction of the MSC The MSC that is
  • the radio access network After receiving the handover request, the radio access network allocates radio signaling resources for the handover of the UE; the radio access network of the CS network passes the access parameters of the radio signaling resource through the MSC, the MME, and E-UTRAN is sent to the UE; and the UE switches to a radio access network of the CS network according to the access parameter. .
  • the method further includes: jointly registering by the UE when accessing the EPS network
  • the MSC triggers, by the target MSC, instructing the radio access network of the CS network to allocate a call bearer to the UE, where the call bearer includes a ground bearer circuit and a radio bearer resource.
  • the CSFB service is triggered when the following CS network services are executed: the calling originating service, the called paging service, the fax service, and the CS network video service.
  • the present invention also provides an implementation system of a circuit switched fallback (CSFB) service in an evolved packet domain system (EPS), including: a mobility management entity (MME), an evolved global mobile communication system wireless An access network (E-UTRAN), and a mobile switching center (MSC) jointly registered by the UE when accessing the EPS network, wherein: the MME is configured to: carry a CSFB indication sent by the user equipment (UE) Industry After the request, the E-UTRAN is instructed to switch the UE to the CS network; the E-UTRAN is set to: initiate a handover, and jointly register by the MME and the UE when accessing the EPS network The MSC, the UE is handed over to the CS network; the MSC that is jointly registered by the UE when accessing the EPS network is configured to: assist the E-UTRAN to switch the UE to the CS network.
  • MME mobility management entity
  • E-UTRAN evolved global mobile communication system wireless An access network
  • MSC mobile switching center
  • the system further includes a radio access network of the CS network, where: the E-UTRAN is further configured to: select a target cell to be handed over, and jointly register the MSC by the MME to the UE when accessing the EPS network. Sending a handover request, notifying the target cell that selects the handover to the MSC that is jointly registered by the UE; the MSC jointly registered by the UE when accessing the EPS network is further configured to: determine according to the target cell notified by the E-UTRAN a radio access network of the CS network, sending a handover request to the radio access network, indicating no bearer handover; the CS network radio access network is configured to: allocate handover for the UE after receiving the handover request a wireless signaling resource, and the access parameter of the wireless signaling resource is sent to the UE by using the MSC, the MME, and the E-UTRAN, so that the UE switches to the CS network according to the access parameter.
  • the E-UTRAN is further configured to: select a target
  • the MSC that is jointly registered by the UE when accessing the EPS network is further configured to: after the UE switches to the radio access network of the CS network according to the access parameter, indicate the radio access network of the CS network.
  • a call bearer is allocated to the UE, where the call bearer includes a ground bearer circuit and a radio bearer resource.
  • the system also includes a radio access network of the CS network and an MSC that governs the target cell;
  • the E-UTRAN is further configured to: select a target cell to be handed over, and send, by the MME, a handover request to the MSC that is jointly registered by the UE when accessing the EPS network, and notify the target cell that the handover is selected to the UE.
  • the jointly registered MSC; the MSC jointly registered by the UE when accessing the EPS network is further configured to: if it is determined that the target cell is not within the jurisdiction of the MSC, the MSC that governs the target cell is used as a target MSC, indicating the target MSC; the MSC that is in the target cell is configured to: determine a radio access network of the CS network, send a handover request to the radio access network of the CS network, indicating that there is no bearer handover;
  • the network radio access network is configured to: allocate a radio signaling resource for the handover of the UE after receiving the handover request, and pass the access parameter of the radio signaling resource to the MSC, the MME, and the E-UTRAN And sending, to the UE, the UE to switch to a radio access network of the CS network according to the access parameter.
  • the MSC that is in charge of the target cell is further configured to: trigger by the MSC that is jointly registered by the UE when accessing the EPS network, and the MSC that is in the target cell indicates that the radio access network allocates a call bearer to the UE.
  • the call bearer includes a ground bearer circuit and a radio bearer resource.
  • the radio access network of the CS network includes a Global System for Mobile Communications Radio Access Network (UTRAN) or a Global System for Mobile Communications (GSM) Enhanced Data Rate GSM Evolution Technology Radio Access Network (GERAN).
  • the E-UTRAN is configured to select a target cell according to a measurement report of the UE.
  • the present invention provides a method for implementing circuit-switched service fallback.
  • the MSC that is dropped back needs to be updated with the jointly registered MSC, thereby extending service access. Time problem.
  • FIG. 1 is a network architecture diagram of a terminal implementing a CS service under an EPS network access according to the prior art
  • FIG. 2 is a flow chart of a call from a prior art terminal for implementing a CS service fallback CS network under EPS network access;
  • 3 is a schematic flow chart of a first embodiment of the present invention;
  • FIG. 5 is a schematic flow chart of a third embodiment of the present invention;
  • the preferred embodiment of the present invention is as follows: After the UE accesses the EPS network, when the service of the CS network is performed, the CSFB service is triggered, and the UE sends the CSFB service request to the MME while carrying the CSFB indication; After receiving the service request that is sent by the UE and carrying the CSFB indication, the MME instructs the E-UTRAN to switch the UE to the CS network; the E-UTRAN initiates a handover, and the MME and the UE are connected. The MSC jointly registered when entering the EPS network switches the UE to the CS network.
  • the CSFB service is triggered when the following CS network services are executed: the calling originating service, the called paging service, the fax service, and the CS network video service.
  • the foregoing handover of the UE to the CS network refers to switching the UE to a wireless access network of the CS network, including UTRAN or GERAN.
  • the foregoing E-UTRAN initiates a handover, and the step of the UE and the UE jointly registering the MSC to switch the UE to the CS network when accessing the EPS network includes the following steps:
  • the E-UTRAN selects a target cell to be handed over, and sends a handover request to the MSC jointly registered by the MME by the MME, and notifies the target cell that is selected to be handed over to the MSC jointly registered by the UE; preferably, E The UTRAN can select the target cell according to the measurement of the UE.
  • the MSC jointly registered by the UE determines a radio access network of the CS network according to the target cell, sends a handover request to the radio access network, indicating that there is no bearer handover, and the radio access network receives the handover request. And then, the radio signaling resource is allocated to the handover of the UE; the radio access network sends the access parameter of the radio signaling resource to the UE by using the MSC, the MME, and the E-UTRAN; (b) the UE switches to the radio access network of the CS network according to the access parameter.
  • the UE After the UE is switched to the radio access network of the CS network according to the access parameter of the radio signaling resource, the UE is triggered by the MSC jointly registered by the UE, and the radio access network is instructed to allocate a call bearer to the UE, including the ground. Bearer circuits and radio bearer resources.
  • the MSC jointly registered by the UE determines that the target cell is not within the jurisdiction of the MSC, the MSC that governs the target cell is used as the target MSC, and the target MSC determines the radio access network of the CS network, and the target MSC connects to the radio.
  • the network access sends a handover request, indicating that there is no bearer handover, and the radio access network allocates a radio signaling resource for the handover of the UE after receiving the handover request.
  • the MSC that is jointly registered by the UE triggers, and the target MSC instructs the wireless access network to allocate a call bearer to the UE.
  • FIG. 3 is an embodiment of a target UTRAN network within the jurisdiction of a MSC in which a user is jointly registered.
  • the user terminal initiates a call on the EPS network, and the MME notifies the E-UTRAN to drop the user back to the UTRAN network.
  • the target UTRAN network is within the MSC jurisdiction of the user joint registration, and includes the following steps: Step 301: The UE accesses the E-UTRAN network, and If the UE is successfully registered to the MSC and the user initiates the call, the UE finds that the current network cannot implement the call service of the CS network, and then sends an enhanced service request message to the MME through the E-UTRAN network.
  • the message carries the CSFB indication, which is used to notify the MME to switch the UE.
  • Step 302 The MME sends a notification CSFB message to the E-UTRAN according to the CSFB indication, instructing the E-UTRAN to switch the UE to the CS network;
  • the handover request message further carries a bearer identifier that needs to be switched.
  • E-UTRAN will select a target cell according to the content of the measurement report.
  • the E-UTRAN transmits at least the CSFB indication and related information of the target cell to the MME.
  • Step 305 The MME receives the handover request, and determines that if the user currently has a data service, the packet domain handover procedure is triggered, which is not described in detail in the present invention. After the packet domain handover is completed, step 306 is performed; if the user does not currently have the data service, Step 306 is directly executed.
  • Step 306 The MME determines whether the CSFB indication is carried in the handover request. If the MME sends the handover request, the MME sends the handover request, the message carries the user identifier, the target cell information, and the CSFB indication.
  • the MME may The MSC that is jointly registered by the UE is configured to send a handover request to the MSC that is jointly registered by the UE, and the MSC participates in the handover procedure, thereby avoiding the service access time caused by the difference between the dropped MSC and the jointly registered MSC in the prior art. Extended problem. If there is no CSFB indication in the handover request, it is processed according to the existing process. Step 307: The MSC receives the MME handover request, determines that the handover request message carries the CSFB indication, and then determines whether to allow the CSFB service according to the service performed by the user.
  • step 308 If yes, step 308 is performed, otherwise the handover is refused;
  • the scenario is "the target UTRAN network is within the MSC jurisdiction of the user joint registration", which is determined by the judgment of the MSC in this step.
  • the MSC determines whether the target cell indicated by the target cell identifier carried in the handover request is within the jurisdiction of the MSC, and if yes, executing step 308, if not, See the process of the second embodiment.
  • Step 308 The MSC selects a target UTRAN according to the target cell in the handover request message. The handover request is sent, and the message indicates that there is no bearer handover.
  • the UTRAN receives the handover request, allocates the radio signaling resource, and returns a handover response message to the MSC, where the message carries the access parameter of the allocated radio signaling resource.
  • the UE does not bear in the CS network, so the MSC indicates no bearer handover to the target UTRAN, and the target UTRAN allocates radio signaling resources to the UE, that is, the handover signaling dedicated control channel resource.
  • Step 309 The MSC receives the handover response message, and forwards the handover response message to the MME.
  • Step 310 The MME receives the handover response message, sends a handover command to the UE through the E-UTRAN, and notifies the UE to switch to the target UTRAN network, where the handover command carries The allocated radio signaling resource access parameter is obtained.
  • Step 311 The UE switches to the radio channel reserved by the UTRAN according to the UTRAN radio signaling resource access parameter in the handover command, and completes the handover operation. After the completion, the UE encapsulates the call setup message. The device message is sent to the MSC through the UTRAN network; if it is another service, it can still be sent to the MSC through a call setup message, except that the service type is different.
  • Step 312 The MSC receives the device message of the target UTRAN network, and unpacks the call setup message to determine the call right of the user. If the user is allowed to call, the MSC encapsulates the call response message into the device message, and sends a device message to the UE. 313 - 316. The MSC sends an assignment bearer message to the UTRAN, informing the UTRAN that
  • the UE allocates a call bearer, including a ground bearer circuit and a radio bearer resource, that is, a cable bearer and a radio bearer, where the radio bearer can be used to transmit voice media.
  • Step 317 The MSC establishes a call with the called number in the call setup message according to step 311. Hosted between the PSTNs.
  • FIG. 4 is an embodiment in which the target UTRAN network is not within the jurisdiction of the MSC in which the user is jointly registered.
  • the user terminal initiates a call on the EPS network, and the MME notifies the E-UTRAN to drop the user back to The UTRAN network, the target UTRAN network is not in the MSC jurisdiction of the user joint registration, and includes the following steps: Steps 401-407 are the same as 301-307;
  • the MSC jointly registered by the UE is called the source MSC, and the MME sends the source MSC to the source MSC. Switch the request.
  • Step 408 The source MSC selects a target MSC according to the target cell in the received handover request message, and sends a Mobile Application Part (MAP) message to the target MSC, where the message indicates that there is no bearer handover.
  • the source MSC determines, according to the target cell selected by the E-UTRAN, the target UTRAN to which the target cell belongs, and determines the MSC that governs the target UTRAN as the target MSC.
  • Step 409 The target MSC selects a target UTRAN according to the target cell in the handover request message, and sends a handover request.
  • the handover request message indicates that there is no bearer handover, and the UTRAN receives the handover request, allocates a radio signaling resource, and returns a handover response message to the MSC.
  • the message carries the allocated wireless signaling resource access parameter.
  • the target MSC receives the handover response message, and returns a preliminary handover response MAP message to the source MSC, where the message includes the content of the received handover response message.
  • the source MSC returns a handover response message to the MME, and the MME sends a handover command to the UE through the E-UTRAN, where the handover command carries the radio signaling resource access parameter.
  • Step 413 The UE switches according to the UTRAN radio signaling resource access parameter in the handover command. To the UTRAN reserved radio channel, complete the handover operation, and send a handover complete message to the target MSC through the UTRAN; Step 414: The target MSC informs the MME of the handover complete message through the source MSC; Steps 415 - 416, the UE encapsulates the call setup message into the device The message is sent to the target MSC through the UTRAN network, and after the target MSC receives the device message The content encapsulation is delivered to the source MSC in the MAP message; the call setup message carries the called number.
  • Step 417 The source MSC receives the MAP message of the target MSC, and unpacks the call setup message to determine the call authority of the user. If the user is allowed to call, the MSC encapsulates the call response message into the MAP message, and sends a MAP message to the target MSC.
  • the source MSC instructs the target UTRAN to allocate a call bearer to the UE through the target MSC.
  • Step 420 - 423 the target MSC sends an assignment bearer message to the UTRAN, informing the UTRAN to allocate the ground bearer circuit and the radio bearer resource to the UE.
  • Step 424 The target MSC allocates a handover number, and sends a handover response MAP message to the source MSC, where the message carries the handover number.
  • the handover number is used to establish an inter-office bearer between the source MSC and the target MSC.
  • Step 425 The source MSC establishes a bearer with the target MSC according to the handover number.
  • Step 426 After the bearer of the source MSC caller is established, the bearer between the remote PSTNs is established according to the called number in the call setup message of step 417.
  • Embodiment 3 FIG. 5 is a called embodiment of the target UTRAN network within the MSC jurisdiction of the user joint registration.
  • the user terminal receives the called page in the EPS network (ie, the user terminal receives the page as the called party), and the user terminal sends an enhanced service request to the MME through the E-UTRAN, instructing the CSFB, and the MME notifies the E-UTRAN to drop the user back to the UTRAN.
  • the network, the target UTRAN network is in the MSC jurisdiction of the user joint registration, and includes the following steps: Step 501: The MSC receives a remote PSTN address initial request; Step 502: The MSC sends a paging request to the UE by using the MME; Step 503: After receiving the paging request, the UE sends an enhanced service request message to the MME through the E-UTRAN network, where the message carries the CSFB indication. Steps 504-512 are the same as steps 302-310.
  • Step 513 The UE according to the handover command
  • the UTRAN radio signaling resource access parameter is switched to the UTRAN reserved radio channel, and the handover operation is completed, and the handover complete message is sent to the MSC through the UTRAN;
  • Step 514 The UE sends a paging response message to the MSC through the device message in the UTRAN network;
  • the step is an optional step, and the MSC may also use step 508 as a paging response message.
  • Step 516 The UE encapsulates the call response message in the device. The message is transmitted to the MSC through the UTRAN network.
  • Steps 517 - 520 The MSC sends an assignment bearer message to the UTRAN to notify the UTRAN to allocate the ground bearer circuit and the radio bearer resource.
  • Step 521 The called side bearer is established, and the response is returned to the remote PSTN. Message, connect the call.
  • FIG. 6 is a called embodiment in which the target UTRAN network is not within the jurisdiction of the MSC in which the user is jointly registered.
  • the user terminal receives the called page in the EPS network, and the user terminal sends an enhanced service request to the MME through the E-UTRAN, instructing the CSFB, the MME notifying the E-UTRAN to drop the user back to the UTRAN network, and the target UTRAN network is not under the MSC of the user joint registration.
  • Step 601 - 609 is the same as 501-509;
  • Step 610 The source MSC selects the target MSC according to the target cell in the received handover request message, and sends a preliminary handover request MAP message to the target MSC, in the MAP message. Indicate no bearer Switching;
  • Step 611 The target MSC selects the target UTRAN according to the target cell in the handover request message, sends a handover request, indicates that there is no bearer handover in the handover request message, and the UTRAN receives the handover request, allocates the radio signaling resource, and returns the handover response to the MSC.
  • the message, the handover response message carries the allocated wireless signaling resource access parameter;
  • Step 612 The target MSC receives the handover response message, and returns a preliminary handover response MAP message to the source MSC, where the preliminary handover response MAP message includes the received handover response.
  • Steps 613-614 the source MSC returns a handover response message to the MME, and the MME sends a handover command to the UE through the E-UTRAN, where the handover command carries the radio signaling resource access parameter; Step 615, the UE according to the handover command in the UTRAN radio Accessing the parameters, switching to the UTRAN reserved radio channel, completing the handover operation, and transmitting a handover complete message to the MSC through the UTRAN; Step 616, the target MSC notifying the MME of the handover complete message through the source MSC; Steps 617 - 618, the UE is in the UTRAN network Sending a paging response message to the target MSC by using the device message, after the target MSC receives the message, Means message content encapsulated in the MAP message delivery to the source of the MSC; step 617 and step 618 is an optional step, MSC can step 608 as the paging response message.
  • Step 619 The source MSC ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ 622.
  • the UE encapsulates the call response message in the device message, and delivers the message to the target MSC through the UTRAN network.
  • the target MSC receives the device message, encapsulates the content of the message in the MAP message, and delivers the message to the source MSC.
  • Step 624-627 The target MSC sends an assignment bearer message to the UTRAN, and notifies the UTRAN to allocate the ground bearer circuit and the radio bearer resource.
  • Step 628 The target MSC allocates a handover number, and sends a handover response MAP message to the source MSC, where the handover response MAP message carries the handover.
  • Step 629 The source MSC establishes a bearer with the target MSC according to the handover number.
  • Step 630 After the bearer on the called side is established, the response message is returned to the remote PSTN, and the call is connected.
  • the system for implementing the foregoing method includes: an MME, an E-UTRAN, and an MSC jointly registered by the UE when accessing the EPS network, where: the MME is configured to: receive a service request that carries a CSFB indication sent by the UE. Afterwards, the E-UTRAN is instructed to switch the UE to the CS network; the E-UTRAN is configured to: initiate a handover, and jointly register the MSC by using the MME and the UE when accessing the EPS network. And switching the UE to the CS network; the MSC is configured to: assist the E-UTRAN to switch the UE to the CS network.
  • the MSC that is jointly registered by the UE is further configured to: after the UE switches to the radio access network of the CS network according to the access parameter, instruct the radio access network to allocate a call bearer for the UE, including a ground bearer circuit and Wireless bearer resources.
  • the system further includes a radio access network of the CS network, where: the E-UTRAN is further configured to: select a target cell to be handed over, and send a handover request to the MSC jointly registered by the MME by using the MME, and select a target to be switched.
  • the cell is notified to the MSC jointly registered by the UE; the MSC jointly registered by the UE is further configured to: determine, according to the target cell notified by the E-UTRAN, the radio access network of the CS network, and the radio access to the CS network
  • the network sends a handover request, indicating that there is no bearer handover; the radio access network of the CS network is set to: after receiving the handover request, the UE is Switching allocates wireless signaling resources, and passes the access parameters of the wireless signaling resources through
  • the MSC, the MME, and the E-UTRAN are sent to the UE, so that the UE switches to the radio access network of the CS network according to the access parameter.
  • the above embodiment is only described by taking the radio access network of the CS network as the UTRAN.
  • the radio access network of the CS network may also be GERAN, and the process is the same as that of the UTRAN.
  • the above description is only the preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes can be made to the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and scope of the present invention are intended to be included within the scope of the present invention.
  • the present invention avoids the problem of extending the service access time by the handover mode to prevent the UE from performing CSFB, because the dropped MSC needs to update the location differently from the jointly registered MSC.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Description

一种 EPS中电路交换回落业务的实现方法和***
技术领域 本发明涉及移动通信领域, 尤其涉及一种终端在演进的分组域*** ( Evolved Packet System, 简称为 EPS )网络接入下执行电路交换回落 (Circuit Switched Fallback, 简称为 CSFB)的方法和***。
背景技术
为了保持第三代移动通信***合作项目(3rd Generation Partnership Project, 简称为 3GPP)在移动通信领域的强有力的竟争力, 3GPP目前正致力 研究对分组交换核心(Packet Switched Core, 简称为 PS Core )网和全球移动 通信***无线接入网 ( Universal Mobile Telecommunication System Radio Access Network, 简称为 UTRAN )的演进, 目的是使得演进的 PS Core (简称 为 EPC)可提供更高的传输速率, 更短的传输延时, 并支持演进的 UTRAN ( Evolved UTRAN , 简称为 E-UTRAN ) 、 GSM EDGE无线接入网, ( GSM EDGE radio access network, 简称为 GERAN, 其中 GSM即全球移动通讯系 统(Global System for Mobile communications ) , EDGE即增强型数据速率 GSM演进技术( Enhanced Data Rate for GSM Evolution ) ) 、 UTRAN、 无线 局域网 ( Wireless Local Area Network, 简称为 WLAN )及其它非 3GPP的接 入网络之间的移动性管理。 这个演进的移动通信***被称为演进的分组域系 统( Evolved Packet System, 简称为 EPS ) 。 图 1示出了现有技术的终端在 EPS网络接入下实现 CS业务回落 CS网 络的架构图, 对于图 1中各实体的说明如下: 用户设备 ( User Equipment , 简称为 UE ) 101;
UTRAN 102 : GSM/通用 移动通信 系 统 ( Universal Mobile Telecommunications System, 简称为 UMTS)网络的无线接入网, 提供电路域 和分组域无线接入资源;
E-UTRAN 103 : 演进的无线接入网, 可以提供更高的上下行速率, 更低 的传输延迟和更加可靠的无线传输, E-UTRAN 中包含网元 演进的节点 B (Evolved NodeB, 简称为 eNodeB), 为终端的接入提供无线资源; 服务 GPRS支持节点 ( Serving GPRS Supporting Node, 简称为 SGSN ) 104; 服务网关(Serving Gateway, 简称为 S-GW ) 105, 是一个用户面实体, 负责用户面数据路由处理; 移动性管理实体 ( Mobility Management Entity, 简称为 MME ) 106, 是 一个控制面实体, 临时存储用户数据的服务器, 负责管理和存储 UE 上下文 (比如 UE/用户标识, 移动性管理状态, 用户安全参数等) , 为用户分配临 时标识, 当 UE驻扎在该跟踪区域或者该网络时负责对该用户进行鉴权; 移动交换中心 (Mobile Switching Center, 简称为 MSC ) 107 , 该 MSC 也可以是在 R4阶段及之后的新功能实体 MSC Server等, 在本发明中统一用 MSC/访问位置寄存器( Visitor Location Register , VLR )表示; 公共交换电话网( Public Switched Telephone Network,简称为 PSTN )108, 这里指的是固定电话网络。
当 UE在 EPS网络接入时,通知 MME进行联合注册,并告知支持 CSFB 能力, MME代替 UE向 MSC发起联合注册, MSC收到联合注册消息, 如果 没有用户数据,向用户归属位置寄存器( Home Location Register,简称为 HLR ) 获取用户数据。
图 2示出了现有技术中终端在 EPS网络接入下实现 CS业务回落 CS网 络的起呼流程。 UE在 EPS网络已在 MME和 MSC进行注册, 这时 UE发起 CS业务,UE向 MME发送增强业务请求消息,消息中携带 CSFB指示, MME 收到增强业务请求消息后通过 E-UTRAN通知 UE回落到 UTRAN网络进行 CS业务, 包括以下步骤: 步骤 201、 UE向 MME发送增强业务请求,消息中携带 CSFB指示, CSFB 指示用于指示 MME执行电路交换业务回落; 步骤 202、 MME向 E-UTRAN发送通知 CSFB消息 , 消息中携带 CSFB 指示, 以指示 E-UTRAN本 UE需要回落到 UTRAN网络; 步骤 203、 E-UTRAN可能向 UE获取测量报告, 根据测量报告决定 UE 回落到的具体的小区; 步骤 204、如果 UE在 EPS网络存在数据业务, E-UTRAN触发分组域切 换流程, 把数据业务切换到 UTRAN网络, 本发明对此不做详细描述; 步骤 205、 如果 UE在 EPS网络不存在数据业务, E-UTRAN通知 UE执 行回落, 切换到 UTRAN网络; 步骤 206、 切换成功后, UE在 UTRAN 网络向所服务目的接入小区的 MSC发送业务请求消息; 步骤 207、 如果上述 MSC为 UE在 EPS网络接入联合注册的 MSC, 则 MSC根据用户的业务数据判断, 接收本次业务请求, 向 UE返回业务接入应 答消息, 后续存在加密和鉴权过程, 本发明对此不做详细描述; 步骤 208、 如果步骤 206 所述 MSC不是 UE在 EPS网络接入联合注册 的 MSC, 该 MSC没有用户数据, MSC向 UE返回业务接入拒绝消息, 通知 UE发起位置更新流程; 步骤 209、 UE在 UTRAN重新发起位置更新过程; 步骤 210、 MSC向 HLR获取鉴权参数; 步骤 211、 HLR向 MSC返回鉴权参数, MSC收到鉴权参数通知 UE执 行鉴权过程; 步骤 212、 鉴权成功; 步骤 213 , MSC向 HLR发起位置更新请求; 步骤 214、 HLR通知源 MSC删除用户数据; 步骤 215、 源 MSC通知 MME删除关联关系; 步骤 216、 MME删除用户数据成功后, 向源 MSC返回删除成功消息; 步骤 217、 源 MSC向 HLR返回删除成功消息; 步骤 218、 HLR向 MSC发送***用户数据请求; 步骤 219、 MSC***用户数据成功后, 向 HLR返回***成功消息; 步骤 220、 HLR向 MSC返回位置更新应答消息; 步骤 221、 MSC通知 UTRAN执行加密过程; 步骤 222、 MSC向 UE返回位置更新应答消息; 上述步骤 208-222是 UE回落的 MSC与联合注册的 MSC不是同一个的 时候才需要执行。 步骤 223、 UE向 MSC发起呼叫建立请求; 步骤 224、 MSC通知 UTRAN建立地面电路和无线资源; 步骤 225、 MSC向 PSTN建立局间承载。
如步骤 203描述, E-UTRAN根据 UE的测量艮告的无线信号质量决定回 落的目标小区, 无法保证 UE回落的目标小区所服务的 MSC与 UE在 EPS 网络接入联合注册的 MSC是相同的 MSC。当 UE回落的 MSC和联合注册的 MSC不相同的时候, UE发起呼叫需要额外增加步骤 208-222, 大大延长业 务的接入时间。
发明内容
本发明要解决的技术问题是提供一种 EPS中电路交换回落业务的实现方 法和***, 可以降低业务接入时间。 为解决上述技术问题, 本发明提供了一种演进的分组域***(EPS ) 中 电路交换回落(CSFB ) 业务的实现方法, 包括: 用户设备 ( UE )接入 EPS 网络后, 当执行电路交换(CS ) 网络的业务 时, 触发 CSFB业务, 所述 UE向移动性管理实体(MME )发送携带 CSFB 指示的 CS网络业务请求; 所述 MME收到所述 UE发送的携带 CSFB指示的 CS网络业务请求后, 指示演进的全球移动通信***无线接入网络(E-UTRAN )将所述 UE切换到 所述 CS网络; 以及 所述 E-UTRAN发起切换,通过所述 MME以及所述 UE在接入所述 EPS 网络时联合注册的移动交换中心(MSC ) , 将所述 UE切换到所述 CS网络。 将所述 UE切换到 CS网络是指将所述 UE切换到 CS网络的无线接入网, 所述 CS网络的无线接入网包括全球移动通信***无线接入网络(UTRAN ) 或者全球移动通讯***(GSM )增强型数据速率 GSM演进技术无线接入网 ( GERAN ) 。 所述 E-UTRAN发起切换, 通过 MME以及所述 UE在接入所述 EPS网 络时联合注册的 MSC将所述 UE切换到 CS网络的步骤包括: 所述 E-UTRAN选择切换的目标小区 , 通过所述 MME向所述 UE在接 入所述 EPS网络时联合注册的 MSC发送切换请求, 将选择切换的目标小区 通知给所述 UE在接入所述 EPS网络时联合注册的 MSC; 所述 UE在接入所述 EPS网络时联合注册的 MSC根据所述目标小区确 定 CS网络的无线接入网, 向所述 CS网络的无线接入网发送切换请求,指示 无承载切换, 所述 CS 网络的无线接入网收到切换请求后为所述 UE的切换 分配无线信令资源; 所述 CS 网络的无线接入网将所述无线信令资源的接入 参数通过所述 MSC、 MME以及 E-UTRAN发送给所述 UE; 以及 所述 UE根据所述接入参数切换到所述 CS网络的无线接入网。 所述 E-UTRAN选择切换的目标小区的步骤中,所述 E-UTRAN根据 UE 的测量报告选择目标小区。 所述 UE根据所述无线信令资源的接入参数切换到所述 CS网络的无线 接入网的步骤之后, 所述方法还包括: 由所述 UE在接入所述 EPS网络时联 合注册的 MSC触发, 指示所述 CS网络的无线接入网为 UE分配呼叫承载, 所述呼叫承载包括地面承载电路和无线承载资源。 所述 E-UTRAN发起切换, 通过 MME以及所述 UE在接入所述 EPS网 络时联合注册的 MSC将所述 UE切换到 CS网络的步骤包括: 所述 E-UTRAN选择切换的目标小区 , 通过所述 MME向所述 UE在接 入所述 EPS网络时联合注册的 MSC发送切换请求, 将选择切换的目标小区 通知给所述 UE在接入所述 EPS网络时联合注册的 MSC; 所述 UE在接入所述 EPS网络时联合注册的 MSC根据所述目标小区确 定 CS网络的无线接入网, 向所述 CS网络的无线接入网发送切换请求,指示 无承载切换, 所述 CS 网络无线接入网收到切换请求后为所述 UE的切换分 配无线信令资源的步骤包括: 所述 UE在接入所述 EPS网络时联合注册的 MSC若判定所述目标小区 不在本 MSC管辖范围之内, 则将管辖所述目标小区的 MSC作为目标 MSC, 由所述目标 MSC确定 CS网络的无线接入网, 所述目标 MSC向所述无线接 入网发送切换请求, 指示无承载切换, 所述 CS 网络的无线接入网收到切换 请求后为所述 UE的切换分配无线信令资源; 所述 CS 网络的无线接入网将 所述无线信令资源的接入参数通过所述 MSC、 MME以及 E-UTRAN发送给 所述 UE; 以及 所述 UE根据所述接入参数切换到所述 CS网络的无线接入网。 。 所述 UE根据所述无线信令资源的接入参数切换到所述 CS网络的无线 接入网的步骤之后, 所述方法还包括: 由所述 UE在接入所述 EPS网络时联 合注册的 MSC触发, 通过所述目标 MSC指示所述 CS网络的无线接入网为 UE分配呼叫承载, 所述呼叫承载包括地面承载电路和无线承载资源。 执行以下 CS网络业务时触发 CSFB业务: 主叫起呼业务, 被叫寻呼业 务、 传真业务、 以及 CS网络视频业务。 为解决上述技术问题, 本发明还提供了一种演进的分组域***(EPS ) 中电路交换回落(CSFB )业务的实现***, 包括: 移动性管理实体(MME ) 、 演进的全球移动通信***无线接入网络 ( E-UTRAN ) , 以及 UE在接入所述 EPS网络时联合注册的移动交换中心 (MSC ) , 其中: 所述 MME设置为: 在收到用户设备(UE )发送的携带 CSFB指示的业 务请求后, 指示所述 E-UTRAN将所述 UE切换到所述 CS网络; 所述 E-UTRAN设置为: 发起切换, 通过所述 MME以及所述 UE在接 入所述 EPS网络时联合注册的 MSC, 将所述 UE切换到所述 CS网络; 所述 UE在接入所述 EPS 网络时联合注册的 MSC设置为: 协助所述 E-UTRAN将所述 UE切换到所述 CS网络。 所述***还包括 CS网络的无线接入网, 其中: 所述 E-UTRAN还设置为: 选择切换的目标小区, 通过所述 MME向所 述 UE在接入所述 EPS网络时联合注册的 MSC发送切换请求, 将选择切换 的目标小区通知给所述 UE联合注册的 MSC; 所述 UE在接入所述 EPS网络时联合注册的 MSC还设置为: 根据所述 E-UTRAN通知的目标小区确定 CS网络的无线接入网,向所述无线接入网发 送切换请求, 指示无承载切换; 所述 CS 网络无线接入网设置为: 在收到所述切换请求后为所述 UE的 切换分配无线信令资源, 并将所述无线信令资源的接入参数通过所述 MSC、 MME以及 E-UTRAN发送给所述 UE, 使所述 UE根据所述接入参数切换到 所述 CS网络的无线接入网。 所述 UE在接入所述 EPS网络时联合注册的 MSC还设置为:在 UE根据 所述接入参数切换到所述 CS网络的无线接入网后,指示所述 CS网络的无线 接入网为 UE分配呼叫承载, 所述呼叫承载包括地面承载电路和无线承载资 源。 所述***还包括 CS网络的无线接入网和管辖所述目标小区的 MSC; 其 中:
所述 E-UTRAN还设置为: 选择切换的目标小区, 通过所述 MME向所 述 UE在接入所述 EPS网络时联合注册的 MSC发送切换请求, 将选择切换 的目标小区通知给所述 UE联合注册的 MSC; 所述 UE在接入所述 EPS网络时联合注册的 MSC还设置为: 若判定所 述目标小区不在本 MSC管辖范围之内, 则将管辖所述目标小区的 MSC作为 目标 MSC, 指示所述目标 MSC; 管辖所述目标小区的 MSC设置为: 确定 CS网络的无线接入网, 向所述 CS网络的无线接入网发送切换请求, 指示无承载切换; 所述 CS 网络无线接入网设置为: 在收到所述切换请求后为所述 UE的 切换分配无线信令资源, 并将所述无线信令资源的接入参数通过所述 MSC、 MME以及 E-UTRAN发送给所述 UE, 使所述 UE根据所述接入参数切换到 所述 CS网络的无线接入网。 管辖所述目标小区的 MSC还设置为: 由所述 UE在接入所述 EPS网络 时联合注册的 MSC触发,管辖所述目标小区的 MSC指示所述无线接入网为 UE分配呼叫承载, 所述呼叫承载包括地面承载电路和无线承载资源。 所述 CS 网络的无线接入网包括全球移动通信***无线接入网络 ( UTRAN )或者全球移动通讯***(GSM )增强型数据速率 GSM演进技术 无线接入网 (GERAN ) 。 所述 E-UTRAN是设置为根据 UE的测量报告选择目标小区。
本发明与现有技术相比, 提供一种电路交换业务回落实现方法, 通过切 换的方式以避免 UE执行 CSFB时候, 因回落的 MSC与联合注册的 MSC不 同需要位置更新, 从而导致延长业务接入时间问题。
附图概述 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是根据现有技术的终端在 EPS网络接入下实现 CS业务的网络架构 图;
图 2是现有技术的终端在 EPS网络接入下实现 CS业务回落 CS网络的 起呼流程图; 图 3是本发明实施例一的流程示意图; 图 4是本发明实施例二的流程示意图; 图 5是本发明实施例三的流程示意图; 图 6是本发明实施例四的流程示意图。
本发明的较佳实施方式 本发明的发明构思是: UE接入 EPS网络后, 当执行 CS网络的业务时, 触发 CSFB业务, 所述 UE向 MME发送 CS网络业务请求的同时携带 CSFB 指示; 所述 MME收到所述 UE发送的携带 CSFB指示的业务请求后, 指示 E-UTRAN将所述 UE切换到所述 CS网络; 所述 E-UTRAN发起切换, 通过 所述 MME以及所述 UE在接入所述 EPS网络时联合注册的 MSC, 将所述 UE切换到所述 CS网络。 执行以下 CS网络业务时触发 CSFB业务: 主叫起呼业务, 被叫寻呼业 务、 传真业务、 以及 CS网络视频业务。 上述将所述 UE切换到 CS网络是指将所述 UE切换到 CS网络的无线接 入网, 包括 UTRAN或者 GERAN。 上述 E-UTRAN发起切换, 通过 MME以及所述 UE在接入所述 EPS网 络时联合注册的 MSC将所述 UE切换到 CS网络的步骤, 包括以下步骤:
( a )所述 E-UTRAN选择切换的目标小区, 通过所述 MME向所述 UE 联合注册的 MSC发送切换请求,将选择切换的目标小区通知给所述 UE联合 注册的 MSC; 优选的, E-UTRAN可根据 UE的测量 ^艮告选择目标小区。
( b )所述 UE联合注册的 MSC根据所述目标小区确定 CS网络的无线 接入网, 向所述无线接入网发送切换请求, 指示无承载切换, 所述无线接入 网收到切换请求后为所述 UE的切换分配无线信令资源; 所述无线接入网将 所述无线信令资源的接入参数通过所述 MSC、 MME以及 E-UTRAN发送给 所述 UE; ( b )所述 UE根据所述接入参数切换到所述 CS网络的无线接入网。
UE根据所述无线信令资源的接入参数切换到所述 CS网络的无线接入网 后, 由所述 UE联合注册的 MSC触发, 指示所述无线接入网为 UE分配呼叫 承载, 包括地面承载电路和无线承载资源。 当 UE联合注册的 MSC判断所述目标小区不在本 MSC管辖范围之内, 则将管辖所述目标小区的 MSC作为目标 MSC,由目标 MSC确定 CS网络的 无线接入网, 由目标 MSC 向无线接入网发送切换请求, 指示无承载切换, 无线接入网收到切换请求后为所述 UE的切换分配无线信令资源。 在分配呼 叫承载时, 由 UE联合注册的 MSC触发, 通过所述目标 MSC指示所述无线 接入网为 UE分配呼叫承载。
下面结合附图和实施例对本发明作进一步详细说明。 实施例一 图 3是目标 UTRAN网络在用户联合注册的 MSC管辖范围内的实施例。 用户终端在 EPS网络发起呼叫 , MME通知 E-UTRAN把用户回落到 UTRAN 网络, 目标 UTRAN网络在用户联合注册的 MSC管辖范围内, 包括以下步 骤: 步骤 301、 UE接入到 E-UTRAN网络, 并成功联合注册到 MSC, 用户 发起呼叫,UE发现当前网络无法实现 CS网络的呼叫业务,则通过 E-UTRAN 网络, 向 MME发送增强业务请求消息, 消息中携带 CSFB指示, 用于通知 MME将 UE切换到 CS网络; 步骤 302、 MME根据 CSFB指示, 向 E-UTRAN发送通知 CSFB消息, 指示 E-UTRAN把 UE切换到 CS网络; 步骤 303、 E-UTRAN获取 UE的测量报告; 例如, E-UTRAN可以向 UE获取当前无线测量报告,或者获取自身保存 的最近一次的测量报告。 步骤 304、 E-UTRAN根据测量报告, 选择目标小区, 向 MME发送切换 请求消息, 该切换请求消息中携带 CSFB指示、 源小区标识和目标小区标识 等参数, 如果用户当前存在数据业务连接, 该切换请求消息中还携带需要切 换的承载标识; 在本步骤中, 不管 UE是否存在数据业务, E-UTRAN均会根据测量报告 的内容, 选择一目标小区。
E-UTRAN至少将 CSFB指示以及目标小区的相关信息发送给 MME。 步骤 305、 MME收到切换请求, 判断如果用户当前存在数据业务, 触发 分组域切换流程, 本发明对此不做详细描述, 分组域切换完成后执行步骤 306; 如果用户当前不在存在数据业务, 则直接执行步骤 306。 步骤 306、 MME判断切换请求中是否携带 CSFB指示,如果携带, MME 向 UE联合注册的 MSC发送切换请求, 消息中携带用户标识, 目标小区信息 和 CSFB指示; 由于 MME存储有用户数据,因此 MME可以获知 UE联合注册的 MSC , MME直接向 UE联合注册的 MSC发送切换请求, 由该 MSC参与切换流程, 从而避免了现有技术中因回落的 MSC与联合注册的 MSC不同而导致的业务 接入时间延长的问题。 如果切换请求中没有 CSFB指示, 则按照现有流程处理。 步骤 307、 MSC收到 MME切换请求,判定切换请求消息中携带有 CSFB 指示时, 再根据用户执行的业务, 判断是否允许进行 CSFB业务, 如果允许, 则执行步骤 308, 否则拒绝切换; 本实施例的场景是 "目标 UTRAN网络在用户联合注册的 MSC管辖范 围内" , 这是通过本步骤中的 MSC的判断来确定的。 MSC收到 MME切换 请求后, 在判断允许进行 CSFB业务后, 还判断切换请求中携带的目标小区 标识所指示的目标小区是否在本 MSC管辖范围之内,如果是,执行步骤 308, 如果不是, 参见实施例二的流程。 步骤 308、 MSC根据切换请求消息中的目标小区, 选择目标 UTRAN, 发送切换请求, 消息中指示无承载切换, UTRAN收到切换请求, 分配无线 信令资源, 向 MSC返回切换应答消息, 消息中携带已分配的无线信令资源 的接入参数; 在本实施例中, UE在 CS网络没有承载, 因此 MSC向目标 UTRAN指 示无承载切换, 目标 UTRAN为 UE分配无线信令资源, 即切换信令专用控 制信道资源。 步骤 309、 MSC收到切换应答消息, 把切换应答消息转发给 MME; 步骤 310、 MME收到切换应答消息, 通过 E-UTRAN向 UE发送切换命 令, 通知 UE切换到目标 UTRAN网络, 切换命令中携带已分配的无线信令 资源接入参数; 步骤 311、 UE根据切换命令中 UTRAN无线信令资源接入参数, 切换到 UTRAN预留的无线信道, 完成切换操作, 完成后, UE把呼叫建立消息封装 成装置消息, 通过 UTRAN网络向 MSC发送; 如果是其他业务, 仍可以通过呼叫建立消息发送给 MSC, 区别在于业务 类型不同。 步骤 312、 MSC收到目标 UTRAN网络的装置消息, 解包获取呼叫建立 消息, 对用户呼叫权限进行判断, 如果允许用户呼叫, MSC把呼叫应答消息 封装到装置消息中, 向 UE发送装置消息; 步骤 313 - 316、 MSC向 UTRAN发送指派承载消息, 通知 UTRAN为
UE 分配呼叫承载, 包括地面承载电路和无线承载资源, 即有线承载和无线 承载, 所述无线承载可用于传递语音媒体; 步骤 317、 MSC根据步骤 311呼叫建立消息中的被叫号码, 建立与远端 PSTN间承载。
实施例二 图 4是目标 UTRAN网络不在用户联合注册的 MSC管辖范围内的实施 例。 用户终端在 EPS 网络发起呼叫, MME通知 E-UTRAN把用户回落到 UTRAN网络, 目标 UTRAN网络不在用户联合注册的 MSC管辖范围内, 包 括以下步骤: 步骤 401-407同 301-307; 在本实施例中 , UE联合注册的 MSC称为源 MSC, MME向源 MSC发 送切换请求。 步骤 408、 源 MSC根据收到的切换请求消息中的目标小区, 选择目标 MSC,向目标 MSC发送预备切换请求移动应用部份( Mobile Application Part, 简称为 MAP ) 消息, 消息中指示无承载切换; 所述源 MSC根据 E-UTRAN选择的目标小区确定该目标小区所属的目标 UTRAN, 将管辖该目标 UTRAN的 MSC确定为目标 MSC。 步骤 409、 目标 MSC 根据切换请求消息中的目标小区, 选择目标 UTRAN, 发送切换请求, 切换请求消息中指示无承载切换, UTRAN收到切 换请求, 分配无线信令资源, 向 MSC返回切换应答消息, 消息中携带已分 配无线信令资源接入参数; 步骤 410、 目标 MSC收到切换应答消息, 向源 MSC返回预备切换应答 MAP消息, 消息中包含收到的切换应答消息内容; 步骤 411-412、源 MSC返回切换应答消息给 MME, MME通过 E-UTRAN 向 UE发送切换命令, 切换命令中携带无线信令资源接入参数; 步骤 413、 UE根据切换命令中 UTRAN无线信令资源接入参数, 切换到 UTRAN预留的无线信道, 完成切换操作, 通过 UTRAN向目标 MSC发送切 换完成消息; 步骤 414、 目标 MSC把切换完成消息通过源 MSC告知 MME; 步骤 415 - 416、 UE把呼叫建立消息封装成装置消息, 通过 UTRAN网 络向目标 MSC发送, 目标 MSC收到后, 把装置消息内容封装在 MAP消息 中传递给源 MSC; 呼叫建立消息中携带有被叫号码。 步骤 417、 源 MSC收到目标 MSC的 MAP消息, 解包获取呼叫建立消 息, 对用户呼叫权限进行判断, 如果允许用户呼叫, MSC把呼叫应答消息封 装到 MAP消息中, 向目标 MSC发送 MAP消息; 步骤 418、 目标 MSC收到 MAP消息, 把消息中内容封装在装置消息, 传递给 UE; 步骤 419、 源 MSC向目标 MSC发送预备切换请求 MAP消息, 消息中 携带分配承载指示; 在本实施例中, 源 MSC通过目标 MSC指示目标 UTRAN为 UE分配呼 叫承载。 步骤 420 - 423 , 目标 MSC向 UTRAN发送指派承载消息,通知 UTRAN 为 UE分配地面承载电路和无线承载资源; 步骤 424、 目标 MSC分配切换号码, 向源 MSC发送切换应答 MAP消 息, 消息中携带切换号码; 所述切换号码用于建立源 MSC和目标 MSC之间的局间承载。 步骤 425、 源 MSC根据切换号码, 建立与目标 MSC间承载; 步骤 426、 源 MSC主叫侧承载建立完毕后,根据 417步骤呼叫建立消息 中的被叫号码, 建立远端 PSTN间的承载。
实施例三 图 5是目标 UTRAN网络在用户联合注册的 MSC管辖范围内, 被叫实 施例。用户终端在 EPS网络收到被叫寻呼(即用户终端作为被叫收到寻呼 ) , 用户终端通过 E-UTRAN向 MME发送增强业务请求, 指示 CSFB, MME通 知 E-UTRAN把用户回落到 UTRAN网络, 目标 UTRAN网络在用户联合注 册的 MSC管辖范围内, 包括以下步骤: 步骤 501、 MSC收到远端 PSTN地址初始请求; 步骤 502、 MSC通过 MME向 UE发送寻呼请求; 步骤 503、 UE收到寻呼请求后, UE通过 E-UTRAN网络, 向 MME发 送增强业务请求消息, 消息中携带 CSFB指示; 步骤 504-512同步骤 302-310; 步骤 513、 UE根据切换命令中 UTRAN无线信令资源接入参数, 切换到 UTRAN预留的无线信道, 完成切换操作, 通过 UTRAN向 MSC发送切换完 成消息; 步骤 514、 UE在 UTRAN网络通过装置消息向 MSC发送寻呼应答消息; 本步骤是可选步骤, MSC也可以把步骤 508作为寻呼应答消息; 步骤 515、 MSC把呼叫建立消息封装在装置消息中, 通过 UTRAN网络 向 UE发送; 步骤 516、 UE把呼叫应答消息封装在装置消息中, 通过 UTRAN网络传 递给 MSC; 步骤 517 - 520、 MSC向 UTRAN发送指派承载消息,通知 UTRAN分配 地面承载电路和无线承载资源; 步骤 521、 被叫侧承载建立完毕, 向远端 PSTN返回应答消息, 接通呼 叫。
实施例四 图 6是目标 UTRAN网络不在用户联合注册的 MSC管辖范围内, 被叫 实施例。 用户终端在 EPS 网络收到被叫寻呼, 用户终端通过 E-UTRAN向 MME发送增强业务请求 , 指示 CSFB , MME通知 E-UTRAN把用户回落到 UTRAN网络, 目标 UTRAN网络不在用户联合注册的 MSC管辖范围内, 包 括以下步骤: 步骤 601 - 609同 501-509; 步骤 610、 源 MSC根据收到的切换请求消息中的目标小区, 选择目标 MSC, 向目标 MSC发送预备切换请求 MAP消息, MAP消息中指示无承载 切换; 步骤 611、 目标 MSC 根据切换请求消息中的目标小区, 选择目标 UTRAN, 发送切换请求, 切换请求消息中指示无承载切换, UTRAN收到切 换请求, 分配无线信令资源, 向 MSC返回切换应答消息, 切换应答消息中 携带已分配无线信令资源接入参数; 步骤 612、 目标 MSC收到切换应答消息, 向源 MSC返回预备切换应答 MAP消息, 预备切换应答 MAP消息中包含收到的切换应答消息内容; 步骤 613-614、源 MSC返回切换应答消息给 MME, MME通过 E-UTRAN 向 UE发送切换命令, 切换命令中携带无线信令资源接入参数; 步骤 615、 UE根据切换命令中 UTRAN无线接入参数, 切换到 UTRAN 预留的无线信道, 完成切换操作, 通过 UTRAN向 MSC发送切换完成消息; 步骤 616、 目标 MSC把切换完成消息通过源 MSC告知 MME; 步骤 617 - 618、 UE在 UTRAN网络通过装置消息向目标 MSC发送寻呼 应答消息, 目标 MSC收到后, 把装置消息内容封装在 MAP消息中传递给源 MSC; 步骤 617和步骤 618是可选步骤, MSC可以把步骤 608作为寻呼应答消 息。 步骤 619、 源 MSC ·ί巴呼叫建立消息封装到 MAP消息中, 向目标 MSC 发送 MAP消息; 步骤 620、 目标 MSC收到 MAP消息, 把消息中内容封装在装置消息, 传递给 UE; 步骤 621 - 622、 UE把呼叫应答消息封装在装置消息中, 通过 UTRAN 网络传递给目标 MSC , 目标 MSC收到装置消息,把消息中内容封装在 MAP 消息, 传递给源 MSC; 步骤 623、 源 MSC向目标 MSC发送预备切换请求 MAP消息, 预备切 换请求 MAP消息中携带分配承载指示; 步骤 624-627、 目标 MSC向 UTRAN发送指派承载消息 , 通知 UTRAN 分配地面承载电路和无线承载资源; 步骤 628、 目标 MSC分配切换号码, 向源 MSC发送切换应答 MAP消 息, 切换应答 MAP消息中携带切换号码; 步骤 629、 源 MSC根据切换号码, 建立与目标 MSC间承载; 步骤 630、 被叫侧承载建立完毕, 向远端 PSTN返回应答消息, 接通呼 叫。
实现上述方法的***包括: 包括: MME、 E-UTRAN, 以及 UE在接入 所述 EPS网络时联合注册的 MSC, 其中: 所述 MME设置为: 在收到 UE发送的携带 CSFB指示的业务请求后, 指示所述 E-UTRAN将所述 UE切换到所述 CS网络; 所述 E-UTRAN设置为: 发起切换, 通过所述 MME以及所述 UE在接 入所述 EPS网络时联合注册的 MSC, 将所述 UE切换到所述 CS网络; 所述 MSC设置为:协助所述 E-UTRAN将所述 UE切换到所述 CS网络。 所述 UE联合注册的 MSC还设置为:在 UE根据所述接入参数切换到所 述 CS网络的无线接入网后, 指示所述无线接入网为 UE分配呼叫承载, 包 括地面承载电路和无线承载资源。 上述***还包括 CS网络的无线接入网, 其中: 所述 E-UTRAN还设置为: 选择切换的目标小区, 通过所述 MME向所 述 UE联合注册的 MSC发送切换请求, 将选择切换的目标小区通知给所述 UE联合注册的 MSC; 所述 UE联合注册的 MSC还设置为:根据所述 E-UTRAN通知的目标小 区确定 CS网络的无线接入网, 向 CS网络的所述无线接入网发送切换请求, 指示无承载切换; 所述 CS 网络的无线接入网设置为: 在收到所述切换请求后为所述 UE 的切换分配无线信令资源, 并将所述无线信令资源的接入参数通过所述
MSC、 MME以及 E-UTRAN发送给所述 UE, 使所述 UE根据所述接入参数 切换到所述 CS网络的无线接入网。 上述实施例仅以 CS网络的无线接入网为 UTRAN为例进行说明, 所述 CS网络的无线接入网也可以是 GERAN , 流程与 UTRAN相同。 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。 本领域普通技术人员可以理解上述方法中的全部或部分步骤可通过程序 来指令相关硬件完成, 所述程序可以存储于计算机可读存储介质中, 如只读 存储器、 磁盘或光盘等。 可选地, 上述实施例的全部或部分步骤也可以使用 一个或多个集成电路来实现。 相应地, 上述实施例中的各模块 /单元可以釆用 硬件的形式实现, 也可以釆用软件功能模块的形式实现。 本发明不限制于任 何特定形式的硬件和软件的结合。
工业实用性 本发明通过切换的方式以避免 UE执行 CSFB时候,因回落的 MSC与联 合注册的 MSC不同需要位置更新, 从而导致延长业务接入时间问题。

Claims

权 利 要 求 书
1、 一种演进的分组域***(EPS ) 中电路交换回落(CSFB ) 业务的实 现方法, 该方法包括: 用户设备 ( UE )接入 EPS 网络后, 当执行电路交换(CS ) 网络的业务 时, 触发 CSFB业务, 所述 UE向移动性管理实体(MME )发送携带 CSFB 指示的 CS网络业务请求; 所述 MME收到所述 UE发送的携带 CSFB指示的 CS网络业务请求后, 指示演进的全球移动通信***无线接入网络(E-UTRAN )将所述 UE切换到 所述 CS网络; 以及 所述 E-UTRAN发起切换,通过所述 MME以及所述 UE在接入所述 EPS 网络时联合注册的移动交换中心(MSC ) , 将所述 UE切换到所述 CS网络。
2、 如权利要求 1所述的方法, 其中: 将所述 UE切换到 CS网络是指将所述 UE切换到 CS网络的无线接入网, 所述 CS网络的无线接入网包括全球移动通信***无线接入网络(UTRAN ) 或者全球移动通讯***(GSM )增强型数据速率 GSM演进技术无线接入网 ( GERAN ) 。
3、 如权利要求 1 所述的方法, 其中, 所述 E-UTRAN发起切换, 通过 MME以及所述 UE在接入所述 EPS网络时联合注册的 MSC将所述 UE切换 到 CS网络的步骤包括: 所述 E-UTRAN选择切换的目标小区 , 通过所述 MME向所述 UE在接 入所述 EPS网络时联合注册的 MSC发送切换请求, 将选择切换的目标小区 通知给所述 UE在接入所述 EPS网络时联合注册的 MSC; 所述 UE在接入所述 EPS网络时联合注册的 MSC根据所述目标小区确 定 CS网络的无线接入网, 向所述 CS网络的无线接入网发送切换请求,指示 无承载切换, 所述 CS 网络的无线接入网收到切换请求后为所述 UE的切换 分配无线信令资源; 所述 CS 网络的无线接入网将所述无线信令资源的接入 参数通过所述 MSC、 MME以及 E-UTRAN发送给所述 UE; 以及 所述 UE根据所述接入参数切换到所述 CS网络的无线接入网。
4、 如权利要求 3所述的方法, 其中, 所述 E-UTRAN选择切换的目标小 区的步骤中, 所述 E-UTRAN根据 UE的测量报告选择目标小区。
5、 如权利要求 3所述的方法, 其中: 所述 UE根据所述无线信令资源的接入参数切换到所述 CS网络的无线 接入网的步骤之后, 所述方法还包括: 由所述 UE在接入所述 EPS网络时联 合注册的 MSC触发, 指示所述 CS网络的无线接入网为 UE分配呼叫承载, 所述呼叫承载包括地面承载电路和无线承载资源。
6、 如权利要求 1 所述的方法, 其中, 所述 E-UTRAN发起切换, 通过 MME以及所述 UE在接入所述 EPS网络时联合注册的 MSC将所述 UE切换 到 CS网络的步骤包括: 所述 E-UTRAN选择切换的目标小区 , 通过所述 MME向所述 UE在接 入所述 EPS网络时联合注册的 MSC发送切换请求, 将选择切换的目标小区 通知给所述 UE在接入所述 EPS网络时联合注册的 MSC; 所述 UE在接入所述 EPS网络时联合注册的 MSC根据所述目标小区确 定 CS网络的无线接入网, 向所述 CS网络的无线接入网发送切换请求,指示 无承载切换, 所述 CS 网络无线接入网收到切换请求后为所述 UE的切换分 配无线信令资源的步骤包括: 所述 UE在接入所述 EPS网络时联合注册的 MSC若判定所述目标小区 不在本 MSC管辖范围之内, 则将管辖所述目标小区的 MSC作为目标 MSC, 由所述目标 MSC确定 CS网络的无线接入网, 所述目标 MSC向所述无线接 入网发送切换请求, 指示无承载切换, 所述 CS 网络的无线接入网收到切换 请求后为所述 UE的切换分配无线信令资源; 所述 CS 网络的无线接入网将 所述无线信令资源的接入参数通过所述 MSC、 MME以及 E-UTRAN发送给 所述 UE; 以及 所述 UE根据所述接入参数切换到所述 CS网络的无线接入网。
7、 如权利要求 6所述的方法, 其中: 所述 UE根据所述无线信令资源的接入参数切换到所述 CS网络的无线 接入网的步骤之后, 所述方法还包括: 由所述 UE在接入所述 EPS网络时联 合注册的 MSC触发, 通过所述目标 MSC指示所述 CS网络的无线接入网为 UE分配呼叫承载, 所述呼叫承载包括地面承载电路和无线承载资源。
8、 如权利要求 1所述的方法, 其中: 执行以下 CS网络业务时触发 CSFB业务: 主叫起呼业务, 被叫寻呼业 务、 传真业务、 以及 CS网络视频业务。
9、 一种演进的分组域***(EPS ) 中电路交换回落(CSFB ) 业务的实 现***, 包括: 移动性管理实体(MME )、 演进的全球移动通信***无线接 入网络( E-UTRAN ) , 以及 UE在接入所述 EPS网络时联合注册的移动交换 中心 (MSC ) , 其中: 所述 MME设置为: 在收到用户设备(UE )发送的携带 CSFB指示的业 务请求后, 指示所述 E-UTRAN将所述 UE切换到所述 CS网络; 所述 E-UTRAN设置为: 发起切换, 通过所述 MME以及所述 UE在接 入所述 EPS网络时联合注册的 MSC, 将所述 UE切换到所述 CS网络; 所述 UE在接入所述 EPS 网络时联合注册的 MSC设置为: 协助所述 E-UTRAN将所述 UE切换到所述 CS网络。
10、 如权利要求 9所述的***, 其中, 所述***还包括 CS网络的无线 接入网, 其中: 所述 E-UTRAN还设置为: 选择切换的目标小区, 通过所述 MME向所 述 UE在接入所述 EPS网络时联合注册的 MSC发送切换请求, 将选择切换 的目标小区通知给所述 UE联合注册的 MSC; 所述 UE在接入所述 EPS网络时联合注册的 MSC还设置为: 根据所述 E-UTRAN通知的目标小区确定 CS网络的无线接入网,向所述无线接入网发 送切换请求, 指示无承载切换; 所述 CS 网络无线接入网设置为: 在收到所述切换请求后为所述 UE的 切换分配无线信令资源, 并将所述无线信令资源的接入参数通过所述 MSC、 MME以及 E-UTRAN发送给所述 UE, 使所述 UE根据所述接入参数切换到 所述 CS网络的无线接入网。
11、 如权利要求 10所述的***, 其中: 所述 UE在接入所述 EPS网络时联合注册的 MSC还设置为:在 UE根据 所述接入参数切换到所述 CS网络的无线接入网后,指示所述 CS网络的无线 接入网为 UE分配呼叫承载, 所述呼叫承载包括地面承载电路和无线承载资 源。
12、 如权利要求 9所述的***, 其中, 所述***还包括 CS网络的无线 接入网和管辖所述目标小区的 MSC; 其中: 所述 E-UTRAN还设置为: 选择切换的目标小区, 通过所述 MME向所 述 UE在接入所述 EPS网络时联合注册的 MSC发送切换请求, 将选择切换 的目标小区通知给所述 UE联合注册的 MSC; 所述 UE在接入所述 EPS网络时联合注册的 MSC还设置为: 若判定所 述目标小区不在本 MSC管辖范围之内, 则将管辖所述目标小区的 MSC作为 目标 MSC, 指示所述目标 MSC; 管辖所述目标小区的 MSC设置为: 确定 CS网络的无线接入网, 向所述 CS网络的无线接入网发送切换请求, 指示无承载切换; 所述 CS 网络无线接入网设置为: 在收到所述切换请求后为所述 UE的 切换分配无线信令资源, 并将所述无线信令资源的接入参数通过所述 MSC、 MME以及 E-UTRAN发送给所述 UE, 使所述 UE根据所述接入参数切换到 所述 CS网络的无线接入网。
13、 如权利要求 12所述的***, 其中: 管辖所述目标小区的 MSC还设置为: 由所述 UE在接入所述 EPS网络 时联合注册的 MSC触发,管辖所述目标小区的 MSC指示所述无线接入网为 UE分配呼叫承载, 所述呼叫承载包括地面承载电路和无线承载资源。
14、 如权利要求 10或 12所述的***, 其中: 所述 CS 网络的无线接入网包括全球移动通信***无线接入网络 ( UTRAN )或者全球移动通讯***(GSM )增强型数据速率 GSM演进技术 无线接入网 (GERAN ) 。
15、 如权利要求 10所述的***, 其中: 所述 E-UTRAN是设置为根据 UE的测量报告选择目标小区。
PCT/CN2010/077585 2009-10-17 2010-10-08 一种eps中电路交换回落业务的实现方法和*** WO2011044825A1 (zh)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US14/237,095 US9706444B2 (en) 2009-10-17 2010-10-08 Method and system for enabling circuit switched fallback service in evolved packet system

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN200910174829.2 2009-10-17
CN200910174829.2A CN102045791B (zh) 2009-10-17 2009-10-17 一种eps中电路交换回落业务的实现方法和***

Publications (1)

Publication Number Publication Date
WO2011044825A1 true WO2011044825A1 (zh) 2011-04-21

Family

ID=43875838

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2010/077585 WO2011044825A1 (zh) 2009-10-17 2010-10-08 一种eps中电路交换回落业务的实现方法和***

Country Status (3)

Country Link
US (1) US9706444B2 (zh)
CN (1) CN102045791B (zh)
WO (1) WO2011044825A1 (zh)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2627026C2 (ru) * 2013-06-13 2017-08-03 Хуавэй Текнолоджиз Ко., Лтд. Способ передачи обслуживания между сетями, устройство и система
RU2663218C1 (ru) * 2017-07-14 2018-08-02 Хуавэй Текнолоджиз Ко., Лтд. Способ передачи обслуживания между сетями, устройство и система
US10231153B2 (en) 2013-11-01 2019-03-12 Huawei Technologies Co., Ltd. Network handover method, device, and system
CN112805976A (zh) * 2018-10-12 2021-05-14 瑞典爱立信有限公司 演进分组***回退能力的指示

Families Citing this family (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102790957A (zh) * 2011-05-18 2012-11-21 中兴通讯股份有限公司 Ue处于非连接状态时触发csfb流程的方法及***
WO2012167467A1 (zh) * 2011-07-06 2012-12-13 华为技术有限公司 处理电路交换域业务返回传统网络的方法、移动管理实体和***
EP2772093B1 (en) * 2011-10-28 2020-02-26 BlackBerry Limited Method and apparatus to handle bearers during circuit switched fallback operation
GB2500267A (en) * 2012-03-16 2013-09-18 Nec Corp Using subscription information for a mobile device to select parameters when handing over from a LTE network to a CDMA network
CN102612015B (zh) 2012-03-21 2017-11-17 中兴通讯股份有限公司 一种寻呼方法及装置
CN103428822A (zh) * 2012-05-14 2013-12-04 中兴通讯股份有限公司 分流到无线局域网络的接入方法及***、mme和ue
CN103517255A (zh) * 2012-06-15 2014-01-15 中兴通讯股份有限公司 一种业务分流方法、移动性管理实体及终端
EP2874435B1 (en) 2012-07-13 2016-10-26 Huawei Technologies Co., Ltd. Method, device and system for handover to circuit switched domain
CN103229554A (zh) * 2012-12-27 2013-07-31 华为技术有限公司 基于重定向的电路域回落的通信方法及通信装置
CN104080134A (zh) * 2013-03-25 2014-10-01 ***通信集团广东有限公司 电路域回落处理方法、装置、多模终端和***
CN104380794B (zh) 2013-06-13 2018-12-07 华为技术有限公司 一种网络切换的方法、设备及***
CN104380793A (zh) * 2013-06-13 2015-02-25 华为技术有限公司 一种网络切换的方法、设备及***
WO2014198070A1 (zh) * 2013-06-14 2014-12-18 华为技术有限公司 一种csfb实现方法及设备
CN103609168B (zh) * 2013-06-21 2017-04-19 华为技术有限公司 电路域回落csfb的接入方法、移动管理实体和移动交换中心
CN105122882B (zh) 2013-11-04 2019-05-10 华为技术有限公司 一种网络切换的方法、设备及***
WO2017028164A1 (zh) * 2015-08-17 2017-02-23 华为技术有限公司 一种电路域回落的方法及装置
CN105376765B (zh) * 2015-12-02 2019-04-05 中国联合网络通信集团有限公司 一种降低csfb时延的方法及装置
US10911989B2 (en) * 2015-12-29 2021-02-02 Huawei Technologies Co., Ltd. Method for keeping in circuit switched fallback CSFB network and user terminal
US10869234B2 (en) * 2017-11-20 2020-12-15 Lenovo (Singapore) Pte. Ltd. Fallback assistance information
EP4115648A4 (en) * 2020-03-02 2023-04-19 NEC Corporation COMMUNICATION METHOD, DEVICE AND COMPUTER STORAGE MEDIA
CN114071620B (zh) * 2020-08-05 2024-03-26 华为技术有限公司 通信方法、装置及***

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101222765A (zh) * 2008-01-24 2008-07-16 中兴通讯股份有限公司 电路域回落的控制方法、***、及装置
WO2009056932A2 (en) * 2007-11-01 2009-05-07 Telefonaktiebolaget Lm Ericsson (Publ) Circuit-switched services over sae/lte networks
CN101453727A (zh) * 2007-11-30 2009-06-10 华为技术有限公司 一种联合注册的方法、***和分组交换域网络侧设备
CN101499967A (zh) * 2008-02-03 2009-08-05 中兴通讯股份有限公司 电路域寻呼实现方法及***

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8254981B2 (en) * 2009-05-04 2012-08-28 Research In Motion Limited Identifying radio access technology characteristics to mobile stations system and method
US8842633B2 (en) * 2009-05-04 2014-09-23 Blackberry Limited Systems and methods for mobile stations to identify radio access technologies
WO2010146468A2 (en) * 2009-06-16 2010-12-23 Research In Motion Limited Method for accessing a service unavailable through a network cell

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009056932A2 (en) * 2007-11-01 2009-05-07 Telefonaktiebolaget Lm Ericsson (Publ) Circuit-switched services over sae/lte networks
CN101453727A (zh) * 2007-11-30 2009-06-10 华为技术有限公司 一种联合注册的方法、***和分组交换域网络侧设备
CN101222765A (zh) * 2008-01-24 2008-07-16 中兴通讯股份有限公司 电路域回落的控制方法、***、及装置
CN101499967A (zh) * 2008-02-03 2009-08-05 中兴通讯股份有限公司 电路域寻呼实现方法及***

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2627026C2 (ru) * 2013-06-13 2017-08-03 Хуавэй Текнолоджиз Ко., Лтд. Способ передачи обслуживания между сетями, устройство и система
US10231152B2 (en) 2013-06-13 2019-03-12 Huawei Technologies Co., Ltd. Network handover method, device, and system
US10231153B2 (en) 2013-11-01 2019-03-12 Huawei Technologies Co., Ltd. Network handover method, device, and system
RU2663218C1 (ru) * 2017-07-14 2018-08-02 Хуавэй Текнолоджиз Ко., Лтд. Способ передачи обслуживания между сетями, устройство и система
CN112805976A (zh) * 2018-10-12 2021-05-14 瑞典爱立信有限公司 演进分组***回退能力的指示
CN112805976B (zh) * 2018-10-12 2023-09-22 瑞典爱立信有限公司 演进分组***回退能力的指示

Also Published As

Publication number Publication date
CN102045791B (zh) 2013-06-12
US9706444B2 (en) 2017-07-11
CN102045791A (zh) 2011-05-04
US20140177599A1 (en) 2014-06-26

Similar Documents

Publication Publication Date Title
US9706444B2 (en) Method and system for enabling circuit switched fallback service in evolved packet system
US11497076B2 (en) Service processing method and service processing apparatus
US9264964B2 (en) Traffic offload via local network based on APN-specific or non-APN-specific information
AU2008265241B2 (en) System and method for providing voice service in a multimedia mobile network
WO2009094916A1 (fr) Procédé, système et dispositif de commande pour redémarrage après défaillance dans le domaine circuit
US10517121B2 (en) Service processing method, related apparatus, and system
WO2011153702A1 (zh) 公众陆地移动网的选择方法、装置及***
WO2018059401A1 (zh) 网络切换方法、装置及***,网络接入方法及装置
US20160100337A1 (en) Circuit switched fallback method and device
WO2009089790A1 (fr) Procédé pour l'acquisition du type d'un service support et pour la commutation entre réseaux supports pour des terminaux
WO2014005444A1 (zh) 分流到无线局域网络的接入方法及***、mme和ue
CN105706518B (zh) Csfb呼叫建立方法及装置
WO2012055093A1 (zh) 移动交换中心池中的寻呼处理方法及装置
WO2019061433A1 (zh) 一种csfb的回落结果检测方法及装置、存储介质
WO2012040918A1 (zh) 目标无线接入技术选择方法、装置和***
KR101558230B1 (ko) 패킷 스위칭된 도메인으로부터 서킷 스위칭된 도메인으로 호 핸드오버 방법 및 장치
KR102111763B1 (ko) 통화 연속성 제공 방법 및 장치
WO2016026118A1 (zh) 一种下行电路交换回落csfb的寻呼处理方法和设备

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: 10823055

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: 10823055

Country of ref document: EP

Kind code of ref document: A1

WWE Wipo information: entry into national phase

Ref document number: 14237095

Country of ref document: US