WO2014101438A1 - 一种业务切换方法、移动终端及移动交换中心 - Google Patents

一种业务切换方法、移动终端及移动交换中心 Download PDF

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Publication number
WO2014101438A1
WO2014101438A1 PCT/CN2013/082018 CN2013082018W WO2014101438A1 WO 2014101438 A1 WO2014101438 A1 WO 2014101438A1 CN 2013082018 W CN2013082018 W CN 2013082018W WO 2014101438 A1 WO2014101438 A1 WO 2014101438A1
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Prior art keywords
service
domain
mobile terminal
lte
instruction
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PCT/CN2013/082018
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English (en)
French (fr)
Inventor
李方向
任晗
李锋
黄非
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华为技术有限公司
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Publication of WO2014101438A1 publication Critical patent/WO2014101438A1/zh

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    • 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 service switching method, a mobile terminal, and a mobile switching center. Background technique
  • the core network of the Long Term Evolution (LTE) system only retains the Packet Switched (PS) domain, which is called the Evolved Packet Core (EPC) network.
  • the evolved packet core network mainly includes the MME and services. Three logical entities: the Serving Gateway (S-GW) and the Packet Data Network Gateway (PGW).
  • S-GW Serving Gateway
  • PGW Packet Data Network Gateway
  • the radio access network of the LTE system is an Evolved Universal Terrestrial Radio Access Network (E-UTRAN).
  • E-UTRAN Evolved Universal Terrestrial Radio Access Network
  • the user equipment can also pass the GSM/EDGE radio access network (GSM EDGE Radio Access Network).
  • GSM EDGE Radio Access Network GSM EDGE Radio Access Network
  • GERAN GSM EDGE Radio Access Network
  • UTRAN Universal Terrestrial Radio Access Network
  • LTE In the early stage of LTE network deployment, LTE is generally used as a hotspot coverage, mainly for data services, such as short message services.
  • Circuit Switch (CS) domain-related services (calls, supplementary services, etc.) are still performed on 2/3G networks.
  • CS Fallback (CSFB) implements this function, so that when the mobile terminal is camped on the LTE network, it can fall back to the CS domain for CS-related services, and automatically return to the LTE network after the CS service is completed.
  • the inventor believes that the prior art has at least the following problems: According to the existing CSFB scheme, after returning to the CS domain to complete a CS service, if there is one or more CS services immediately thereafter, Then the mobile terminal still needs to return to the LTE network, and then fall back to the CS domain network. The network performs the second CS service, which increases the delay of the subsequent services and the signaling overhead. Summary of the invention
  • the purpose of the embodiments of the present invention is to provide a service switching method, a mobile terminal, and a mobile switching center, so that in the CSFB scenario, after the mobile terminal completes a CS service, it needs to perform subsequent CS services in succession.
  • the switchover and signaling overhead caused by multiple handovers are avoided.
  • an embodiment of the present invention provides a method for service switching, including:
  • the circuit domain fallback CSFB sent by the mobility management entity, the CSFB indication, falling back from the long-term evolution LTE domain to the circuit-switched CS domain according to the CSFB indication, and performing the first CS service in the CS domain;
  • the mobile terminal returns to the LTE domain.
  • the instruction that the delay returns to the LTE domain is the time when the MSC obtains the second CS service from the subscription data of the user corresponding to the mobile terminal, and the first CS The difference in the end time of the service is sent when the difference between the times is less than a predetermined time threshold.
  • the instruction that the delay returns to the LTE domain is obtained by the MSC according to the service type of the first CS service, and the second CS corresponding to the service type of the first CS service is obtained.
  • the start time of the service is obtained by the difference between the start time of the second CS service and the end time of the first CS service, and is sent when the difference between the times is less than a predetermined time threshold.
  • an embodiment of the present invention provides a mobile terminal, including:
  • a receiving unit configured to receive a circuit domain fallback CSFB indication sent by the mobility management entity MME; and a circuit domain fallback unit, configured to fall back from the long term evolution LTE domain to the circuit switched CS domain according to the CSFB indication received by the receiving unit;
  • a CS service execution unit configured to perform a first CS service in the CS domain after the mobile terminal falls back to the CS domain;
  • the receiving unit is further configured to receive an instruction that the mobile switching center MSC sends a delay to the LTE domain, where the instruction is used to indicate that the mobile terminal continues to reside in the CS domain after completing the first CS service;
  • the CS service execution unit is further configured to: return to the CS domain according to the delay of the receiving unit to return to the LTE domain, and perform the second CS service in the CS domain;
  • Return unit used to return to the LTE domain.
  • the delay received by the receiving unit returns an instruction of the LTE domain, and the time when the MSC obtains the second CS service from the subscription data corresponding to the mobile terminal is The difference between the end time of the first CS service is less than a predetermined time threshold and then sent.
  • the receiving unit receives the delayed return
  • the MSC obtains the start time of the second CS service according to the service type of the first CS service, and the mapping relationship between the service type of the first CS service and the start time of the second CS service.
  • the difference between the end time of the first CS service is less than a predetermined time threshold and then sent.
  • an embodiment of the present invention provides a mobile switching center, including:
  • a first circuit-switched CS service processing unit configured to: after the mobile terminal retreats from the long-term evolution LTE domain to the CS domain, perform interaction with the mobile terminal to perform a first CS service; and instruct the mobile terminal to complete the first CS service After that, continue to reside in the CS domain;
  • a second CS service unit configured to: after the mobile terminal receives the delayed return to the LTE domain, interact with the mobile terminal that continues to reside in the CS domain to perform the second CS service.
  • the mobile switching center further includes: an acquiring unit, configured to obtain a time when the second CS service starts from the subscription data of the user corresponding to the mobile terminal, and the foregoing The difference between the end time of a CS service, when the difference between the times is less than a predetermined time
  • the sending unit is notified to send the instruction that the delay returns to the LTE domain.
  • the mobile switching center further includes: an acquiring unit, configured to obtain, according to a service type of the first CS service, a first type corresponding to the service type of the first CS service And a start time of the second CS service, where a difference between the start time of the second CS service and the end time of the first CS service is obtained, and when the difference between the times is less than a predetermined time threshold, the sending unit is notified to send the Delayed return to the LTE domain instructions.
  • an acquiring unit configured to obtain, according to a service type of the first CS service, a first type corresponding to the service type of the first CS service And a start time of the second CS service, where a difference between the start time of the second CS service and the end time of the first CS service is obtained, and when the difference between the times is less than a predetermined time threshold, the sending unit is notified to send the Delayed return to the LTE domain instructions.
  • the service switching method, the mobile terminal, and the mobile switching center provided by the embodiment of the present invention, when the mobile terminal performs one CS service, and needs to successively perform subsequent CS services, delays returning to the LTE domain, thereby avoiding unnecessary CS domain to LTE domain, and the LTE domain falls back to the CS domain for subsequent
  • FIG. 1 is a flowchart of a service switching method according to an embodiment of the present invention.
  • FIG. 2 is a flowchart of another service switching method according to an embodiment of the present invention.
  • FIG. 3 is a flowchart of still another service switching method according to an embodiment of the present disclosure.
  • FIG. 4 is a flowchart of still another service switching method according to an embodiment of the present disclosure.
  • FIG. 5 is a schematic structural diagram of a mobile terminal according to an embodiment of the present disclosure.
  • FIG. 6 is a schematic structural diagram of still another mobile terminal according to an embodiment of the present invention.
  • FIG. 7 is a schematic structural diagram of a mobile switching center according to an embodiment of the present invention.
  • FIG. 8 is a schematic structural diagram of still another mobile switching center according to an embodiment of the present invention.
  • the technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.
  • a schematic diagram of a service switching method according to an embodiment of the present invention includes:
  • the mobile terminal receives the CSFB indication sent by the mobility management entity MME, and returns to the CS domain, and performs the first CS service in the CS domain.
  • the mobile falls back from the LTE domain to the circuit switched CS domain according to the CSFB indication, and performs the first CS service in the CS domain.
  • the receiving, by the mobile switching center, the MSC sends a delay to the LTE domain, where the instruction is used to indicate that the mobile terminal continues to reside in the CS domain after completing the first CS service.
  • the instruction for delaying the return of the LTE domain may be sent by the MSC after the MSC learns from the subscription data that the difference between the time when the second CS service starts and the first CS service end time is less than a predetermined time threshold; specifically, the mobile terminal
  • the second CS service is set in the subscription data of the corresponding user, and the second CS service is a service to be executed in the predetermined time period after the end of the first CS service.
  • the subscription time of the user corresponding to the mobile terminal may further set a specific time when the second CS service starts to be executed, and calculate the second CS service start time and the first CS service end time by using the time. difference.
  • the MSC may obtain the start time of the second CS service according to the service type of the first CS service, and the mapping relationship between the service type of the first CS service and the start time of the second CS service, and obtain the second CS.
  • the instruction to return the delay to the LTE domain is sent after the difference between the start of the service and the end time of the first CS service is less than a predetermined time threshold.
  • the second CS service may arrive at the time when the second CS service in the subscription data starts. Execute.
  • the mobile terminal returns to the LTE domain.
  • the mobile terminal After the second CS service ends, the mobile terminal returns to the LTE domain.
  • the mobile terminal may again determine the start time of the third CS service and the end time of the second CS service after the second CS service ends. If the difference is less than the predetermined time threshold, if the value is less than the predetermined time threshold, the mobile terminal again receives an instruction to delay returning to the LTE domain, and continues to reside in the CS domain to complete the third CS service.
  • the embodiment of the present invention is not limited to two or three types of CS services, and may also be more CS services, and the principle is the same as above.
  • an embodiment of the present invention when the difference between the start time of the second CS service and the end time of the first CS service is less than the predetermined time threshold, the mobile terminal returns the instruction of the LTE domain by receiving the delay, after completing the first CS service. Residing in the CS domain completes the second CS service and then returns to the LTE domain. The delay and signaling overhead caused by the unnecessary return of the LTE domain from the CS domain and the second CS service from the LTE domain to the CS domain are avoided.
  • an embodiment of the present invention provides a method for service switching, including:
  • the mobile terminal sends an extended service request message to the MME via the evolved base station eNodeB.
  • the extended service request may include a parameter that triggers the mobile terminal to perform CS domain fallback.
  • the MME returns a modification request message to the eNodeB, and carries the CSFB indication.
  • the eNodeB sends an RRC Release message to the mobile terminal.
  • the RRC Release message carries a CSFB indication, informing the mobile terminal to fall back to the CS domain.
  • the mobile terminal establishes a CS connection with the MSC through the base station controller.
  • the MSC determines whether there is a second CS service after the end of the first CS service. If in the first CS After the service ends, if there is no second CS service, the process goes to S208, and the mobile terminal immediately returns to the LTE domain. If the second CS service is completed after the end of the first CS service, and the difference between the time between the start of the second CS service and the end time of the first CS service is less than a predetermined time threshold, then S206 is performed;
  • the specific judging method may be that the MSC obtains the user's subscription data from the Home Location Register (HLR) or the Visit Location Register (VLR) or the Service Control Point (SCP), and the subscription data is obtained from the subscription data.
  • HLR Home Location Register
  • VLR Visit Location Register
  • SCP Service Control Point
  • the difference between the start time of the second CS service and the end of the first CS service can be obtained from the subscription data.
  • a predetermined time threshold for example, less than 5 seconds
  • the MSC can also obtain the start time of the second CS service according to its configuration and the service type of the first CS service. Specifically, the MSC configures a mapping relationship between the service type of the first CS service and the start time of the second CS service, and obtains the start time of the second service by using the service type of the first service, because the MSC can obtain the first CS service.
  • the end time and further, whether the difference between the time between the start time of the second CS service and the end time of the first CS service is less than a predetermined time threshold, if it is less than the time threshold, then S206 is performed;
  • the first CS service or the second CS service refers to a complete CS service, such as a complete voice call process, or a complete supplementary service process.
  • the MSC sends an instruction to the mobile terminal to carry a delay to return to the LTE domain.
  • the instruction of the delay returning to the LTE domain is used to notify the mobile terminal to continue to camp in the CS domain and not immediately return to the LTE domain after performing the first CS service, and continue to perform the second CS service in the CS domain; specifically, The instruction to return the LTE domain is carried by the clear command ClearCommand message. 5207. Perform a second CS service in the CS domain.
  • the mobile terminal After receiving the delay to return to the LTE domain, the mobile terminal continues to reside in the CS domain and performs the second CS service in the CS domain.
  • the mobile terminal returns to the LTE domain.
  • the mobile terminal After the second CS service ends, the mobile terminal returns to the LTE domain.
  • the above steps S201-S204 are standard flow back from the LTE domain to the CS domain, and S208 also returns the LTE flow for the standard CS domain.
  • the method for returning the LTE domain may be: the mobile terminal sends a tracking area update message to the MME, and the MME sends a location update request message to the MSC, accepts the location update response returned by the MSC, and then sends a tracking area update accept message to the mobile terminal, where the mobile terminal Return to the LTE domain.
  • the start time of the third CS service and the end time of the second CS service may be determined again after S207, referring to S205, if the third CS service starts.
  • the time and the end time of the second CS service are less than the predetermined threshold.
  • the mobile terminal continues to camp on the CS domain to perform the third CS service.
  • the embodiment of the present invention is not limited to two or three types of CS services, and may also be more CS services, and the principle is the same as above.
  • the embodiment of the present invention provides another method for service switching. After the mobile terminal completes the CS voice call service, it directly performs the Unstmcted Supplementary Service Data (US SD) service and does not immediately return to LTE. Specifically include:
  • S301 The mobile terminal sends an extended service request message to the MME via the eNodeB.
  • the MME returns a modification request message to the eNodeB, and carries a CSFB indication.
  • the eNodeB sends an RRC Release message to the mobile terminal.
  • the RRC Release message carries a CSFB indication, informing the mobile terminal to fall back to the CS domain. 5304, establishing a CS connection;
  • the mobile terminal establishes a CS connection with the MSC through the base station controller.
  • the MSC may obtain the user subscription data from the HLR or the VLR or the SCP.
  • the subscriber's subscription information has a field indicating that the user needs to know the call charge status after the completion of the voice call service, and the USSD service is required to notify the user of the call charge status.
  • Another field of the subscription information may indicate the time difference between the USSD service start time and the end of the CS voice call. When the time difference is less than the predetermined time threshold, then S306 is performed next.
  • the USSD service is a supplementary service and is also a CS service.
  • the process in which the MSC obtains the subscription data is a standard process, and the present invention will not be described again.
  • the MSC sends an instruction to the mobile terminal to carry the delay back to the LTE domain;
  • the instruction of the delay returning to the LTE domain is used to notify the mobile terminal to stay in the CS domain and not return to the LTE domain immediately after the CS voice call service is completed, and continue the USSD service in the CS domain;
  • the instruction of returning to the LTE domain may be carried by the clear command ClearCommand message.
  • the mobile terminal returns to the LTE domain according to the delay sent by the MSC. After the CS voice call service ends, the mobile terminal does not return to the LTE domain and directly performs the USSD service to learn the user's call charge status.
  • the mobile terminal After the USSD service ends, the mobile terminal returns to the LTE domain.
  • the method for returning to the LTE may be a standard process.
  • the mobile terminal sends a tracking area update message to the MME, and the MME sends a location update request message to the MSC, accepts the location update response returned by the MSC, and then sends a tracking area update accept message to the mobile terminal, and moves.
  • the terminal returns to the LTE domain.
  • the specific USSD service is also a standard process and will not be described here.
  • the mobile terminal does not immediately return to the LTE, but returns to the LTE domain after the USSD service is completed, thereby reducing unnecessary return from the CS domain to the LTE domain.
  • the embodiment of the present invention provides another method for service switching. After the mobile terminal completes the USSD service, it directly performs voice call services and does not immediately return to LTE. Specifically include:
  • S401 The mobile terminal sends an extended service request message to the MME via the eNodeB.
  • the MME returns a modification request message to the eNodeB, and carries the CSFB indication.
  • the eNodeB sends an RRC Release message to the mobile terminal.
  • the RRC Release message carries a CSFB indication, informing the mobile terminal to fall back to the CS domain.
  • the mobile terminal establishes a CS connection with the MSC through the base station controller.
  • the mobile terminal performs a USSD service.
  • the MSC can learn that the service type of the service is USSD service by parsing the USSD message. According to the mapping relationship between the service type of the USSD service and the start time of the CS voice call service, the time when the CS voice call service starts after the USSD service is obtained, because the MSC can obtain the end time of the USSD service, if the CS voice call service The difference between the start time and the USSD service end time is less than the predetermined time threshold, and then S406 is performed.
  • the predetermined time threshold should be less than the sum of the time taken by the mobile terminal to return to the LTE domain and fall back to the CS domain again.
  • the CS voice call service after the USSD service may be a callback service or a voicemail service. The embodiment of the present invention is not limited herein.
  • the MSC sends an instruction to the mobile terminal to carry the delay back to the LTE domain.
  • the instruction of the delay returning to the LTE domain is used to notify the mobile terminal to stay in the CS domain and not return to the LTE domain immediately after performing the USSD service, and continue the CS voice call service in the CS domain;
  • the instruction of returning to the LTE domain may be carried by the clear command ClearCommand message.
  • the mobile terminal After the CS voice call service ends, the mobile terminal returns to the LTE domain.
  • the method for returning to the LTE may be: the mobile terminal sends a tracking area update message to the MME, and the MME sends a location update request message to the MSC, accepts the location update response returned by the MSC, and further sends a tracking area update accept message to the mobile terminal, and the mobile terminal returns to the LTE. area.
  • the embodiment of the present invention is not limited to the USSD service, and may also be other CS supplementary services.
  • the mobile terminal does not immediately return to the LTE, but returns to the LTE domain after the completion of the subsequent CS voice call service, thereby reducing unnecessary CS domain to the LTE domain, and LTE. Delay and signaling overhead caused by the domain falling back to the CS domain.
  • an embodiment of the present invention provides a mobile terminal, including:
  • the receiving unit 501 is configured to receive a CSFB indication sent by the MME.
  • circuit domain fallback unit 502 configured to fall back from the long term evolution LTE domain to the circuit switched CS domain according to the CSFB indication received by the receiving unit;
  • the CS service execution unit 503 is configured to perform a first CS service in the CS domain after the mobile terminal falls back to the CS domain.
  • the receiving unit 501 is further configured to receive an instruction that is sent by the mobile switching center MSC to the LTE domain, and the instruction is used to indicate that the mobile terminal continues to reside in the CS domain after completing the first CS service.
  • the CS service execution unit 503 is further configured to: return to the CS domain according to the delay of the LTE domain received by the receiving unit 501, and perform the second CS service in the CS domain;
  • the returning unit 504 is configured to return to the LTE domain after the second CS service ends.
  • the delay received by the receiving unit 501 returns an instruction of the LTE domain, and the MSC learns, from the subscription data, the difference between the time when the second CS service starts and the end time of the first CS service, when the difference between the times is less than a predetermined one. Sent when the time is wide; or The delay received by the receiving unit 501 returns an instruction of the LTE domain, and the MSC learns the second according to the service type of the first CS service and the mapping relationship between the service type of the first CS service and the start time of the second CS service. The time when the CS service starts, the difference between the start time of the second CS service and the end time of the first CS service is obtained, and is sent when the difference between the times is less than a predetermined time threshold.
  • time threshold should be less than the sum of the time taken by the mobile terminal to directly return to the LTE domain and fall back to the CS domain after completing the first CS service.
  • FIG. 6 is a structural diagram of another mobile terminal according to an embodiment of the present invention. As shown in FIG. 6, the mobile terminal includes at least one processor 601, a communication bus 602, a memory 603, and at least one communication interface. 604.
  • the communication bus 602 is configured to implement a connection and communication between the components, and the communication interface 604 is configured to connect and communicate with an external device.
  • the memory 603 is configured to store program code that needs to be executed, and the program code may specifically include: a circuit domain fallback unit 6031, a receiving unit 6032, a CS service execution unit 6033, and a returning unit 6034, when the foregoing unit is used by the processor When 601 is executed, the following functions are implemented:
  • the receiving unit 6031 is configured to receive a CSFB indication sent by the MME.
  • circuit domain fallback unit 6032 configured to fall back from the long term evolution LTE domain to the circuit switched CS domain according to the CSFB indication received by the receiving unit;
  • the CS service execution unit 6033 is configured to perform the first CS service in the CS domain after the mobile terminal falls back to the CS domain.
  • the receiving unit 6031 is further configured to receive an instruction that the mobile switching center MSC sends a delay to the LTE domain, where the instruction is used to indicate that the mobile terminal continues to reside in the CS domain after completing the first CS service.
  • the CS service execution unit 6033 is further configured to continue to reside in the CS domain according to the delay of the LTE domain received by the receiving unit 6031, and perform the second CS service in the CS domain;
  • the returning unit 6034 is configured to return to the LTE domain after the second CS service ends. Further, the delay received by the receiving unit 6031 returns an instruction of the LTE domain, and the MSC learns, from the subscription data, the difference between the time when the second CS service starts and the end time of the first CS service, when the difference between the times is less than a predetermined one. Sent when the time is wide; or
  • the delay received by the receiving unit 6031 returns an instruction of the LTE domain, and the MSC learns the second according to the service type of the first CS service and the mapping relationship between the service type of the first CS service and the start time of the second CS service.
  • the time when the CS service starts, the difference between the start time of the second CS service and the end time of the first CS service is obtained, and is sent when the difference between the times is less than a predetermined time threshold.
  • time threshold should be less than the sum of the time taken by the mobile terminal to directly return to the LTE domain and fall back to the CS domain after completing the first CS service.
  • the mobile terminal provided by the embodiment of the present invention delays returning to the LTE domain when the mobile terminal needs to perform two or more CS services in succession, thereby reducing unnecessary return of the CS domain to the LTE, and then falling back to the CS by the LTE. The resulting delay and signaling overhead.
  • an embodiment of the present invention provides a mobile switching center, including:
  • a first CS service processing unit 701 configured to: after the mobile terminal retreats from the long term evolution LTE domain to the CS domain, perform interaction with the mobile terminal to perform a first CS service; and cause the mobile terminal to complete the first CS After the business, continue to reside in the CS domain;
  • the second CS service unit 703 is configured to: after the mobile terminal receives the instruction to delay returning to the LTE domain, perform interaction with the mobile terminal that continues to reside in the CS domain to perform the second CS service.
  • the mobile switching center may further include an acquiring unit, configured to:
  • the notification Determining, according to the service type of the first CS service, a start time of the second CS service corresponding to the service type of the first CS service, and obtaining a difference between the start time of the second CS service and the end time of the first CS service Notifying the sending unit when the difference between the times is less than a predetermined time threshold
  • FIG. 8 is a structural diagram of another mobile switching center according to an embodiment of the present invention.
  • the mobile terminal includes at least one processor 801, a communication bus 802, a memory 803, and at least one communication. Interface 804.
  • the communication bus 802 is configured to implement a connection and communication between the components, and the communication interface 804 is configured to connect and communicate with an external device.
  • the memory 803 is configured to store program code that needs to be executed, and the program code may specifically include: a first CS service processing unit 8031, a sending unit 8032, and a second CS service processing unit 8033, when the foregoing unit is used by the processor.
  • the program code may specifically include: a first CS service processing unit 8031, a sending unit 8032, and a second CS service processing unit 8033, when the foregoing unit is used by the processor.
  • a first CS service processing unit 701 configured to: after the mobile terminal retreats from the long term evolution LTE domain to the CS domain, perform interaction with the mobile terminal to perform a first CS service; and cause the mobile terminal to complete the first CS After the business, continue to reside in the CS domain;
  • the second CS service unit 703 is configured to: after the mobile terminal receives the instruction to delay returning to the LTE domain, perform interaction with the mobile terminal that continues to reside in the CS domain to perform the second CS service.
  • the mobile switching center provided by the embodiment of the present invention reduces the unnecessary return of the CS domain to the LTE domain, and reduces the unnecessary return of the CS domain to the LTE domain, when the mobile terminal needs to perform the CS service for two or more times in succession. Delay and signaling overhead caused by LTE falling back to CS.
  • the various embodiments in the present specification are described in a progressive manner, and the same similar parts between the various embodiments may be referred to each other, and each embodiment focuses on different embodiments from other embodiments.
  • the description is relatively simple, and the execution process of each unit specific function can be referred to the description of the method embodiment.
  • the device embodiments described above are merely illustrative, wherein the units illustrated as separate components may or may not be physically separate, and the components displayed as units may or may not be physical units, ie may be located in one place. , or it can be distributed to multiple network elements. Some or all of the units may be selected according to actual needs to achieve the objectives of the embodiment of the present embodiment. Those of ordinary skill in the art can understand and implement without any creative effort.

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Abstract

本发明涉及通信技术领域,尤其涉及一种业务切换的方法、移动终端及移动交换中心。移动终端接收移动性管理实体 MME发送的电路域回落 CSFB指示,根据所述 CSFB指示从长期演进 LTE域回落到电路交换 CS域,并在 CS 域进行第一 CS业务;接收移动交换中心 MSC发送的延时返回 LTE域的指令,所述指令用于指示所述移动终端完成所述第一 CS业务后,继续驻留在 CS域;根据所述延时返回 LTE域的指令,继续驻留在 CS域,并在 CS域进行第二 CS 业务;在所述第二 CS业务结束后,移动终端返回 LTE域。

Description

一种业务切换方法、 移动终端及移动交换中心 技术领域
本发明涉及通信技术领域, 尤其涉及一种业务切换方法、 移动终端及移动 交换中心。 背景技术
目前移动通信网络已经 2/3G网络向长期演进( Long Term Evolution, LTE ) 网络发展, 为了最大化利用现有 2/3G 网络的覆盖和业务质量等资源, 保护运 营商的投资利益最大化。 长期演进( Long Term Evolution, LTE )系统的核心网 只保留了分组( Packet Switched, PS )域,称为演进的分组核心( Evolved Packet Core , EPC ) 网络, 演进的分组核心网络主要包含 MME、 服务网关 ( Serving Gateway, S-GW )、 分组数据网络网关 (Packet Data Network Gateway, PGW ) 三个逻辑实体。 LTE系统的无线接入网是演进通用陆地无线接入网络(Evolved Universal Terrestrial Radio Access Network, E-UTRAN ), 另夕卜, 用户设备也可 以通过 GSM/EDGE无线接入网 ( GSM EDGE Radio Access Network, GERAN ) 或者通用陆地无线接入网络 ( Universal Terrestrial Radio Access Network , UTRAN ) (简写为 GERAN/UTRAN )接入演进的分组核心网络。
LTE网络部署初期, 一般是 LTE做热点覆盖, 主要进行数据业务, 如短 消息业务; 电路交换 (Circuit Switch, CS) 域相关的业务(呼叫、 补充业务等) 则还是在 2/3G网络进行。 电路域回落(CS Fallback, CSFB) 即实现此功能, 使得移动终端驻扎在 LTE网络时, 能够回落到 CS域进行 CS相关的业务, CS 业务完成后自动快速返回 LTE网络。
通过对现有技术的分析, 发明人认为现有技术至少存在以下问题: 按现有的 CSFB方案, 当回落到 CS域进行完一次 CS业务后,若紧接着还 有一次或多次 CS业务, 则移动终端还是要返回 LTE网络, 再回落到 CS域网 络进行第二次 CS业务, 这样增加了后续业务的时延以及信令开销。 发明内容
为克服现有技术的缺陷, 本发明实施例的目的在于提供一种业务切换方 法、移动终端及移动交换中心,使得在 CSFB场景下, 移动终端进行完一次 CS 业务后, 需要接连进行后续 CS业务时, 避免多次切换造成的时延和信令开销。
第一方面, 本发明实施例提供一种业务切换的方法, 包括:
移动终端接收移动性管理实体 MME发送的电路域回落 CSFB指示, 根据 所述 CSFB指示从长期演进 LTE域回落到电路交换 CS域, 并在 CS域进行第 一 CS业务;
接收移动交换中心 MSC发送的延时返回 LTE域的指令, 所述指令用于指 示所述移动终端完成所述第一 CS业务后, 继续驻留在 CS域;
根据所述延时返回 LTE域的指令, 继续驻留在 CS域, 并在 CS域进行第 二 CS业务;
移动终端返回 LTE域。
在第一方面的第一种可能的实现方式中, 所述延时返回 LTE 域的指令由 MSC从所述移动终端对应的用户的签约数据获得第二 CS业务开始的时间与所 述第一 CS业务结束时间之差, 当所述时间之差小于预定的时间阔值时发送。
在第一方面的第二种可能的实现方式中, 所述延时返回 LTE 域的指令由 MSC根据第一 CS业务的业务类型, 获得与所述第一 CS业务的业务类型对应 的第二 CS业务的开始时间,得到所述第二 CS业务开始时间与所述第一 CS业 务结束时间之差, 当所述时间之差小于预定的时间阔值时发送。
第二方面, 本发明实施例提供一种移动终端, 包括:
接收单元,用于接收移动性管理实体 MME发送的电路域回落 CSFB指示; 电路域回落单元, 用于根据所述接收单元接收的所述 CSFB指示, 由长期 演进 LTE域回落到电路交换 CS域; CS业务执行单元, 用于在所述移动终端回落到 CS域之后, 在所述 CS域 进行第一 CS业务;
所述接收单元, 还用于接收移动交换中心 MSC发送的延时返回 LTE域的 指令, 所述指令用于指示所述移动终端在完成第一 CS业务后, 继续驻留在 CS 域;
所述 CS业务执行单元, 还用于根据接收单元接收的延时返回 LTE域的指 令, 继续驻留在 CS域, 并在 CS域进行第二 CS业务;
返回单元, 用于返回 LTE域。
在第二方面的第一种可能的实现方式中, 所述接收单元接收的延时返回 LTE域的指令,由 MSC从所述移动终端对应的签约数据获得第二 CS业务开始 的时间与所述第一 CS业务结束时间之差小于预定的时间阔值后发送。
在第二方面的第二种可能的实现方式中, 所述接收单元接收的延时返回
LTE域的指令, 由 MSC根据第一 CS业务的业务类型, 以及自身配置的第一 CS业务的业务类型与第二 CS业务的开始时间的映射关系, 得到第二 CS业务 开始的时间与所述第一 CS业务结束时间之差小于预定的时间阔值后发送。
第三方面, 本发明实施例提供一种移动交换中心, 包括:
第一电路交换 CS业务处理单元, 用于在移动终端从长期演进 LTE域回落 到 CS域后, 与所述移动终端交互进行第一 CS业务; 于指示所述移动终端完成所述第一 CS业务后, 继续驻留在 CS域;
第二 CS业务单元, 用于在所述移动终端接收到所述延时返回 LTE域的指 令后, 与继续驻留在 CS域的所述移动终端交互进行第二 CS业务。
在第三方面的第一种可能的实现方式中, 所述移动交换中心进一步包括: 获取单元, 用于从所述移动终端对应的用户的签约数据获得第二 CS业务 开始的时间与所述第一 CS业务结束时间之差, 当所述时间之差小于预定的时 间阔值时, 通知所述发送单元发送所述延时返回 LTE域的指令。
在第三方面的第二种可能的实现方式中, 所述移动交换中心进一步包括: 获取单元, 用于根据第一 CS业务的业务类型, 获得与所述第一 CS业务 的业务类型对应的第二 CS业务的开始时间, 得到所述第二 CS业务开始时间 与所述第一 CS业务结束时间之差, 当所述时间之差小于预定的时间阔值时, 通知所述发送单元发送所述延时返回 LTE域的指令。
本发明实施例提供的业务切换方法、 移动终端及移动交换中心, 在移动终 端进行完一次 CS业务后, 需要接连进行后续 CS业务时, 通过延迟返回 LTE 域, 避免了不必要的由 CS域到 LTE域, 以及由 LTE域回落到 CS域进行后续
CS业务而造成的时延和信令开销。 附图说明
为了更清楚地说明本发明实施例的技术方案, 下面将对实施例或现有技术 描述中所需要使用的附图作简单地介绍, 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, 对于本领域普通技术人员来讲, 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为本发明实施例提供的一种业务切换方法流程图图;
图 2为本发明实施例提供的另一种业务切换方法流程图图;
图 3为本发明实施例提供的又一种业务切换方法流程图图;
图 4为本发明实施例提供的再一种业务切换方法流程图图;
图 5为本发明实施例提供的一种移动终端的结构示意图;
图 6为本发明实施例提供的又一种移动终端的结构示意图。
图 7为本发明实施例提供的一种移动交换中心的结构示意图;
图 8为本发明实施例提供的又一种移动交换中心的结构示意图。 具体实施方式 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的一部分实施例, 而不 是全部实施例。 基于本发明中的实施例, 本领域普通技术人员在没有作出创造 性劳动前提下获得的所有其他实施例, 都属于本发明保护的范围。
如图 1所示, 为本发明实施例提供的一种业务切换方法示意图, 包括:
5101 ,移动终端接收移动性管理实体 MME发送的 CSFB指示, 回落到 CS 域, 并在 CS域进行第一 CS业务;
移动根据所述 CSFB指示从 LTE域回落到电路交换 CS域, 并在 CS域进 行第一 CS业务。
5102, 接收移动交换中心 MSC发送的延时返回 LTE域的指令, 所述指令 用于指示移动终端完成所述第一 CS业务后, 继续驻留在 CS域;
这里, 延时返回 LTE域的指令可以由 MSC从签约数据获知第二 CS业务 开始的时间与所述第一 CS 业务结束时间之差小于预定的时间阔值后发送; 具 体的, 所述移动终端对应的用户的签约数据中设定有第二 CS业务, 且第二 CS 业务为第一 CS业务结束后在预定的时间段内要继续执行的业务。 可选地, 所 述移动终端对应的用户的签约数据中还可以设定有第二 CS业务开始执行的具 体时间, 以此时间来计算此第二 CS业务开始时间与第一 CS业务结束时间之 差。
也可以由 MSC根据第一 CS业务的业务类型, 以及自身配置的第一 CS业 务的业务类型与第二 CS业务的开始时间的映射关系, 获得第二 CS业务的开 始时间, 并获知第二 CS业务开始的时间与所述第一 CS业务结束时间之差小 于预定的时间阔值后发送该延时返回 LTE域的指令。
5103 , 根据所述延时返回 LTE域的指令, 继续驻留在 CS域, 并在 CS域 进行第二 CS业务;
具体的, 第二 CS业务可以在签约数据中的第二 CS业务开始的时间到达 时执行。
S104, 移动终端返回 LTE域。
具体的, 可以在第二 CS业务结束后, 移动终端返回 LTE域。 可选的, 当 第二 CS业务之后紧接着还需进行第三 CS业务时,移动终端可以在第二 CS业 务结束后, 再次判断第三 CS业务的开始时间与第二 CS业务的结束时间之差 是否小于预定时间阔值, 若小于预定时间阔值, 则移动终端再次接收延时返回 LTE域的指令, 继续驻留在 CS域, 完成第三 CS业务。 具体的判断第三 CS业 务的开始时间与第二 CS业务的结束时间之差是否小于预定时间阔值的方法, 可以参考 S102 的描述, 在此不再赘述。 当然, 本发明实施例不限于两种或三 种 CS业务, 也可以为更多的 CS业务, 原理同上。
本发明实施例中移动终端在第二 CS业务开始的时间与第一 CS业务结束 时间之差小于预定的时间阔值时, 通过接收延时返回 LTE域的指令, 在完成所 述第一 CS业务后,驻留在 CS域完成第二 CS业务, 再返回 LTE域。避免了不 必要的从 CS域返回 LTE域, 以及由 LTE域回落到 CS域进行第二 CS业务, 从而造成的时延和信令开销。 如图 2所示, 本发明实施例提供一种业务切换的方法, 包括:
5201 , 移动终端经演进基站 eNodeB向 MME发送扩展服务请求消息; 该扩展服务请求可以包含触发移动终端进行 CS域回落的参数。
5202, MME向 eNodeB返回修改请求消息, 携带 CSFB指示;
5203 , eNodeB向移动终端发送 RRC Release消息;
这里, RRC Release消息携带 CSFB指示, 通知移动终端回落到 CS域。
5204, 建立 CS连接;
移动终端通过基站控制器与 MSC建立 CS连接。
5205, 进行第一 CS业务;
MSC判断在第一 CS业务结束后,是否还有第二 CS业务。如果在第一 CS 业务结束后, 没有第二 CS业务, 则转到 S208, 移动终端立即返回 LTE域。 如在第一 CS业务结束后, 还有第二 CS业务, 且第二 CS业务开始的时间 与所述第一 CS 业务结束时间之间的时间之差小于预定的时间阔值, 则执行 S206;
具体的判断方法可以是由 MSC 从归属位置寄存器 (Home Location Register, HLR )或拜访位置寄存器 ( Visit Location Register, VLR )或业务控制 点 ( Service Control Point, SCP )获取用户的签约数据, 从签约数据可以获知在 第一 CS业务后有第二 CS业务,且从签约数据可以获取第二 CS业务开始时间 与第一 CS业务结束的时间之差。 当第二 CS业务开始的时间与所述第一 CS业 务结束时间之间的时间之差小于预定的时间阔值(如小于 5秒 )时,执行 S206; 该时间阔值小于移动终端完成第一 CS业务后, 直接返回 LTE域并回落到 CS 域所用的时间之和。
另外, MSC还可以根据自身的配置, 以及第一 CS业务的业务类型, 获取 第二 CS业务的开始时间。 具体地, MSC配置第一 CS业务的业务类型与第二 CS 业务的开始时间之间的映射关系, 通过第一业务的业务类型, 得到第二业 务的开始时间, 因 MSC可以获得第一 CS业务的结束时间, 进而可以判断第二 CS业务的开始时间与第一 CS业务的结束时间之间的时间之差是否小于预定的 时间阔值, 如果小于该时间阔值, 则执行 S206;
需要指出的是, 这里的第一 CS业务, 或者第二 CS业务, 均是指一次完 整的 CS业务, 如完整的语音呼叫流程, 或完整的补充业务流程。
S206, MSC向移动终端发送的携带延时返回 LTE域的指令;
该延时返回 LTE域的指令用于告知移动终端在进行完第一次 CS业务后, 继续驻留在 CS域而不立刻返回 LTE域, 在 CS域继续进行第二 CS业务; 具体地, 可以通过清除命令 ClearCommand消息携带该延迟返回 LTE域的 指令。 5207, 在 CS域进行第二 CS业务;
移动终端接收到延时返回 LTE域的指令后, 继续驻留在 CS域, 并在 CS 域进行第二 CS业务。
5208, 移动终端返回 LTE域。
在第二 CS业务结束后, 移动终端返回 LTE域。
上述步骤 S201-S204为标准的由 LTE域回落到 CS域的流程, S208也为标 准的 CS域返回 LTE的流程。 其中, 返回 LTE域的方法可以为, 移动终端发送 跟踪区更新消息至 MME , MME向 MSC发送位置更新请求消息 , 接受 MSC 返回的位置更新响应, 进而向移动终端发送跟踪区更新接受消息, 移动终端返 回 LTE域。
当然, 如果第二 CS业务结束后, 接连还有 CS业务, 则可在 S207之后, 参照 S205, 再次判断第三 CS业务的开始时间与第二 CS业务的结束时间, 如 果第三 CS业务的开始时间与第二 CS业务的结束时间小于预定阔值, 则进行 完第二 CS业务后, 移动终端继续驻留在 CS域, 进行第三 CS业务。 当然, 本 发明实施例不限于两种或三种 CS业务, 也可以为更多的 CS业务, 原理同上。
这样, 当移动终端需要接连进行两次或更多次 CS业务时, 延迟返回 LTE 域, 从而减少不必要的由 CS域返回到 LTE, 以及再由 LTE回落到 CS而造成 的时延和信令开销。 如图 3 所示, 本发明实施例提供另一种业务切换的方法。 移动终端完成 CS 语音通话业务后, 直接进行非结构化补充数据业务 ( Unstmcted Supplementary Service Data, US SD )业务, 不立即返回 LTE。 具体包括:
5301 , 移动终端经 eNodeB向 MME发送扩展服务请求消息;
5302, MME向 eNodeB回修改请求消息, 携带 CSFB指示;
5303 , eNodeB向移动终端发送 RRC Release消息;
这里, RRC Release消息携带 CSFB指示, 通知移动终端回落到 CS域。 5304, 建立 CS连接;
移动终端通过基站控制器与 MSC建立 CS连接。
5305, 进行 CS语音通话业务;
具体地, MSC可以从 HLR或 VLR或 SCP获取用户签约数据, 该用户的 签约信息中有一个字段, 表示该语音通话业务完成后, 用户要知道话费状态, 需通过 USSD业务通知用户的话费状态。 签约信息的另一字段可以表明 USSD 业务开始时间与 CS语音通话结束之间的时间差。 当时间差小于预定的时间阔 值时, 则接下来执行 S306。 这里, USSD业务为一种补充业务, 也是一种 CS 业务。 具体的, MSC获取签约数据的过程为标准流程, 本发明不再赘述。
5306, MSC向移动终端发送携带延时返回 LTE域的指令;
该延时返回 LTE域的指令用于告知移动终端在进行完 CS语音通话业务 后, 驻留在 CS域而不立刻返回 LTE域, 在 CS域继续进行 USSD业务;
具体地, 可以通过清除命令 ClearCommand消息携带该延迟返回 LTE域的 指令。
5307, 进行 USSD业务;
移动终端根据 MSC发送的延时返回 LTE域的指令, 在 CS语音通话业务 结束后, 不返回 LTE域, 直接进行 USSD业务, 获知用户话费状态。
5308, 返回 LTE域。
在 USSD业务结束后, 移动终端返回 LTE域。
具体返回 LTE的方法可以为标准的流程,移动终端发送跟踪区更新消息至 MME, MME向 MSC发送位置更新请求消息 ,接受 MSC返回的位置更新响应 , 进而向移动终端发送跟踪区更新接受消息,移动终端返回 LTE域。具体的 USSD 业务也是标准的流程, 在此不再赘述。
通过本实施例的方法, 移动终端在 CS语音通话结束后, 不立即返回 LTE, 而是在 USSD业务完成后返回 LTE域,从而减少了不必要的从 CS域返回到 LTE 域, 以及 LTE域回落到 CS域后再进行 USSD, 而造成的时延和信令开销。 如图 4 所示, 本发明实施例提供又一种业务切换的方法。 移动终端完成 USSD业务后, 直接进行语音通话业务, 不立即返回 LTE。 具体包括:
5401 , 移动终端经 eNodeB向 MME发送扩展服务请求消息;
5402, MME向 eNodeB回修改请求消息, 携带 CSFB指示;
5403 , eNodeB向移动终端发送 RRC Release消息;
这里, RRC Release消息携带 CSFB指示, 通知移动终端回落到 CS域。
5404, 建立 CS连接;
移动终端通过基站控制器与 MSC建立 CS连接。
5405, 移动终端进行 USSD业务;
具体地, MSC通过解析 USSD消息, 可以获知该业务的业务类型为 USSD 业务。才艮据 MSC配置的 USSD业务的业务类型与 CS语音通话业务的开始时间 的映射关系,获知 USSD业务后 CS语音通话业务开始的时间, 因 MSC可以获 得 USSD业务的结束时间, 若 CS语音通话业务开始时间与 USSD业务结束时 间之差小于预定的时间阔值, 则执行 S406。
这里, 该预定的时间阔值应该小于移动终端返回 LTE 域, 并再次回落到 CS域所用的时间之和。 另外, USSD业务之后的 CS语音通话业务, 可以是回 呼业务, 或语音邮箱业务, 本发明实施例在此不作限制。
5406, MSC向移动终端发送携带延时返回 LTE域的指令;
该延时返回 LTE域的指令用于告知移动终端在进行完 USSD业务后,驻留 在 CS域而不立刻返回 LTE域, 在 CS域继续进行 CS语音通话业务;
具体地, 可以通过清除命令 ClearCommand消息携带该延迟返回 LTE域的 指令。
5407, 进行 CS语音通话业务; 不返回 LTE域, 直接进行 CS语音通话业务。
S408, 返回 LTE域。
在 CS语音通话业务结束后, 移动终端返回 LTE域。
具体返回 LTE的方法可以为 ,移动终端发送跟踪区更新消息至 MME, MME 向 MSC发送位置更新请求消息, 接受 MSC返回的位置更新响应, 进而向移动 终端发送跟踪区更新接受消息, 移动终端返回 LTE域。
当然, 本发明实施例不限于 USSD业务, 也可以是其他的 CS补充业务。 通过本实施例的方法, 移动终端在 USSD业务结束后, 不立即返回 LTE, 而是在接下来的 CS语音通话业务完成后返回 LTE域,从而减少了不必要的 CS 域到 LTE域, 以及 LTE域回落到 CS域而造成的时延和信令开销。
如图 5所示, 本发明实施例提供一种移动终端, 包括:
接收单元 501 , 用于接收 MME发送的 CSFB指示;
电路域回落单元 502, 用于根据所述接收单元接收的所述 CSFB指示, 由 长期演进 LTE域回落到电路交换 CS域;
CS业务执行单元 503 ,用于在所述移动终端回落到 CS域之后,在所述 CS 域进行第一 CS业务;
接收单元 501 , 还用于接收移动交换中心 MSC发送的延时返回 LTE域的 指令, 所述指令用于指示移动终端在完成所述第一 CS业务后, 继续驻留在 CS 域;
所述 CS业务执行单元 503 ,还用于根据接收单元 501接收的延时返回 LTE 域的指令, 继续驻留在 CS域, 并在 CS域进行第二 CS业务;
返回单元 504, 用于在所述第二 CS业务结束后, 返回 LTE域。
进一步地, 接收单元 501接收的延时返回 LTE域的指令, 由 MSC从签约 数据获知第二 CS业务开始的时间与所述第一 CS业务结束时间之差, 当所述 时间之差小于预定的时间阔值时发送; 或者 接收单元 501接收的延时返回 LTE域的指令, 由 MSC根据第一 CS业务 的业务类型, 以及自身配置的第一 CS业务的业务类型与第二 CS业务的开始 时间的映射关系, 获知第二 CS业务开始的时间, 得到所述第二 CS业务开始 时间与所述第一 CS业务结束时间之差, 当所述时间之差小于预定的时间阔值 时发送。
需要指出的是, 上述时间阔值应小于移动终端完成第一 CS业务后, 直接 返回 LTE域并回落到 CS域所用的时间之和。
如图 6所示,为本发明实施例提供的另一种移动终端的结构图,如图 6所示, 所述移动终端包括至少一个处理器 601 , 通信总线 602 , 存储器 603以及至少一 个通信接口 604。
其中, 所述通信总线 602用于实现上述组件之间的连接并通信, 所述通信 接口 604用于与外部设备连接并通信。
其中, 所述存储器 603用于存储需要执行的程序代码, 这些程序代码具体 可以包括: 电路域回落单元 6031、 接收单元 6032、 CS业务执行单元 6033、 返回 单元 6034 , 当上述单元被所述处理器 601执行时, 实现如下功能:
接收单元 6031 , 用于接收 MME发送的 CSFB指示;
电路域回落单元 6032 , 用于根据所述接收单元接收的所述 CSFB指示, 由 长期演进 LTE域回落到电路交换 CS域;
CS业务执行单元 6033 , 用于在所述移动终端回落到 CS域之后, 在所述 CS域进行第一 CS业务;
接收单元 6031 ,还用于接收移动交换中心 MSC发送的延时返回 LTE域的 指令, 所述指令用于指示移动终端在完成所述第一 CS业务后, 继续驻留在 CS 域;
所述 CS业务执行单元 6033 , 还用于根据接收单元 6031接收的延时返回 LTE域的指令, 继续驻留在 CS域, 并在 CS域进行第二 CS业务; 返回单元 6034, 用于在所述第二 CS业务结束后, 返回 LTE域。 进一步地,接收单元 6031接收的延时返回 LTE域的指令, 由 MSC从签约 数据获知第二 CS业务开始的时间与所述第一 CS业务结束时间之差, 当所述 时间之差小于预定的时间阔值时发送; 或者
接收单元 6031接收的延时返回 LTE域的指令, 由 MSC根据第一 CS业务 的业务类型, 以及自身配置的第一 CS业务的业务类型与第二 CS业务的开始 时间的映射关系, 获知第二 CS业务开始的时间, 得到所述第二 CS业务开始 时间与所述第一 CS业务结束时间之差, 当所述时间之差小于预定的时间阔值 时发送。
需要指出的是, 上述时间阔值应小于移动终端完成第一 CS业务后, 直接 返回 LTE域并回落到 CS域所用的时间之和。
本发明实施例提供的移动终端, 当移动终端需要接连进行两次或更多次 CS业务时, 延迟返回 LTE域, 从而减少了不必要的由 CS域返回到 LTE, 以 及再由 LTE回落到 CS而造成的时延和信令开销。
如图 7所示, 本发明实施例提供一种移动交换中心, 包括:
第一 CS业务处理单元 701 ,用于在移动终端从长期演进 LTE域回落到 CS 域后, 与所述移动终端交互进行第一 CS业务; 令用于指示所述移动终端完成所述第一 CS业务后, 继续驻留在 CS域;
第二 CS业务单元 703 , 用于在所述移动终端接收到所述延时返回 LTE域 的指令后, 与继续驻留在 CS域的所述移动终端交互进行第二 CS业务。
进一步地, 该移动交换中心还可以包括获取单元, 用于:
从所述移动终端对应的用户的签约数据获得第二 CS业务开始的时间与所 述第一 CS业务结束时间之差, 当所述时间之差小于预定的时间阔值时, 通知 根据第一 CS业务的业务类型, 获得与所述第一 CS业务的业务类型对应 的第二 CS业务的开始时间,得到所述第二 CS业务开始时间与所述第一 CS业 务结束时间之差, 当所述时间之差小于预定的时间阔值时, 通知所述发送单元
702发送所述延时返回 LTE域的指令。
如图 8所示, 为本发明实施例提供的另一种移动交换中心的结构图, 如图 8 所示, 所述移动终端包括至少一个处理器 801 , 通信总线 802 , 存储器 803以及 至少一个通信接口 804。
其中, 所述通信总线 802用于实现上述组件之间的连接并通信, 所述通信 接口 804用于与外部设备连接并通信。
其中, 所述存储器 803用于存储需要执行的程序代码, 这些程序代码具体 可以包括: 第一 CS业务处理单元 8031、 发送单元 8032、 第二 CS业务处理单元 8033 , 当上述单元被所述处理器 801执行时, 实现如下功能:
第一 CS业务处理单元 701 ,用于在移动终端从长期演进 LTE域回落到 CS 域后, 与所述移动终端交互进行第一 CS业务; 令用于指示所述移动终端完成所述第一 CS业务后, 继续驻留在 CS域;
第二 CS业务单元 703 , 用于在所述移动终端接收到所述延时返回 LTE域 的指令后, 与继续驻留在 CS域的所述移动终端交互进行第二 CS业务。
本发明实施例提供的移动交换中心, 当移动终端需要接连进行两次或更多 次 CS业务时, 通过向移动终端发送延迟返回 LTE域, 从而减少了不必要的由 CS域返回到 LTE, 以及再由 LTE回落到 CS而造成的时延和信令开销。
通过以上的实施方式的描述可知, 本领域的技术人员可以清楚地了解到上 述实施例方法中的全部或部分步骤可借助软件加必需的通用硬件平台的方式 来实现。 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 献的部分可以以软件产品的形式体现出来, 该计算机软件产品可以存储在存储 介质中, 如 ROM/RAM、 磁碟、 光盘等, 包括若干指令用以使得一台计算机设 备(可以是个人计算机, 服务器, 或者网络设备等)执行本发明各个实施例或 者实施例的某些部分所述的方法。
需要说明的是, 本说明书中的各个实施例均釆用递进的方式描述, 各个实 施例之间相同相似的部分互相参见即可, 每个实施例重点说明的都是与其他实 施例的不同之处。 尤其,对于装置实施例而言, 由于其基本相似于方法实施例, 所以描述得比较简单, 各单元具体功能的执行过程参见方法实施例的部分说明 即可。 以上所描述的装置实施例仅仅是示意性的, 其中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实施例方案的目 的。 本领域普通技术人员在不付出创造性劳动的情况下, 即可以理解并实施。
总之, 以上所述仅为本发明技术方案的较佳实施例而已, 并非用于限定本 发明的保护范围。 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。

Claims

权利要求
1、 一种业务切换方法, 其特征在于, 包括:
移动终端接收移动性管理实体 MME发送的电路域回落 CSFB指示, 根据 所述 CSFB指示从长期演进 LTE域回落到电路交换 CS域, 并在 CS域进行第 一 CS业务;
接收移动交换中心 MSC发送的延时返回 LTE域的指令, 所述指令用于指 示所述移动终端完成所述第一 CS业务后, 继续驻留在 CS域;
根据所述延时返回 LTE域的指令, 继续驻留在 CS域, 并在 CS域进行第 二 CS业务;
移动终端返回 LTE域。
2、 根据权利要求 1所述的方法, 其特征在于, 所述延时返回 LTE域的指 令由 MSC从所述移动终端对应的用户的签约数据获得第二 CS业务开始的时间 与所述第一 CS业务结束时间之差, 当所述时间之差小于预定的时间阔值时发 送。
3、 根据权利要求 1所述的方法, 其特征在于, 所述延时返回 LTE域的指 令由 MSC根据第一 CS业务的业务类型, 获得与所述第一 CS业务的业务类型 对应的第二 CS业务的开始时间, 得到所述第二 CS业务开始时间与所述第一 CS业务结束时间之差, 当所述时间之差小于预定的时间阔值时发送。
4、 根据权利要求 2或 3所述的方法, 其特征在于, 所述时间阔值小于移 动终端从 CS域返回 LTE域并由 LTE域回落到 CS域所用的时间之和。
5、 根据权利要求 1 所述的方法, 其特征在于, 所述移动终端在进行第二 CS业务之后, 返回 LTE域之前, 进一步包括: 接收 MSC发送的延时返回 LTE域的指令,驻留在 CS域进行第三 CS业务。
6、 一种移动终端, 其特征在于, 包括:
接收单元,用于接收移动性管理实体 MME发送的电路域回落 CSFB指示; 电路域回落单元, 用于根据所述接收单元接收的所述 CSFB指示, 由长期 演进 LTE域回落到电路交换 CS域;
CS业务执行单元, 用于在所述移动终端回落到 CS域之后, 在所述 CS域 进行第一 CS业务;
所述接收单元, 还用于接收移动交换中心 MSC发送的延时返回 LTE域的 指令, 所述指令用于指示所述移动终端在完成第一 CS业务后, 继续驻留在 CS 域;
所述 CS业务执行单元, 还用于根据接收单元接收的延时返回 LTE域的指 令, 继续驻留在 CS域, 并在 CS域进行第二 CS业务;
返回单元, 用于返回 LTE域。
7、 根据权利要求 6 所述的移动终端, 其特征在于, 所述接收单元接收的 延时返回 LTE域的指令, 由 MSC从签约数据获知第二 CS业务开始的时间与 所述第一 CS业务结束时间之差小于预定的时间阔值后发送。
8、 根据权利要求 6 所述的移动终端, 其特征在于, 所述接收单元接收的 延时返回 LTE域的指令, 由 MSC根据第一 CS业务的业务类型, 以及自身配 置的第一 CS业务的业务类型与第二 CS业务的开始时间的映射关系, 得到第 二 CS业务开始的时间与所述第一 CS业务结束时间之差小于预定的时间阔值 后发送。
9、 根据权利要求 7或 8所述的移动终端, 其特征在于, 所述时间阔值小 于移动终端完成第一 CS业务后, 直接返回 LTE域并由 LTE域回落到 CS域所 用的时间之和。
10、 一种移动交换中心, 其特征在于, 包括:
第一电路交换 CS业务处理单元, 用于在移动终端从长期演进 LTE域回落 到 CS域后, 与所述移动终端交互进行第一 CS业务; 于指示所述移动终端完成所述第一 CS业务后, 继续驻留在 CS域;
第二 CS业务单元, 用于在所述移动终端接收到所述延时返回 LTE域的指 令后, 与继续驻留在 CS域的所述移动终端交互进行第二 CS业务。
11、 根据权利要求 10 所述的移动交换中心, 其特征在于, 所述移动交换 中心进一步包括:
获取单元, 用于从所述移动终端对应的用户的签约数据获得第二 CS业务 开始的时间与所述第一 CS业务结束时间之差, 当所述时间之差小于预定的时 间阔值时, 通知所述发送单元发送所述延时返回 LTE域的指令。
12、 根据权利要求 10 所述的移动交换中心, 其特征在于, 所述移动交换 中心进一步包括:
获取单元, 用于根据第一 CS业务的业务类型, 获得与所述第一 CS业务 的业务类型对应的第二 CS业务的开始时间, 得到所述第二 CS业务开始时间 与所述第一 CS业务结束时间之差, 当所述时间之差小于预定的时间阔值时, 通知所述发送单元发送所述延时返回 LTE域的指令。
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CN102547653A (zh) * 2011-12-31 2012-07-04 中兴通讯股份有限公司 减少终端回落到电路交换网次数的方法和系统
CN103024846A (zh) * 2012-12-28 2013-04-03 华为技术有限公司 一种业务切换方法、移动终端及移动交换中心

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