WO2009094916A1 - Procédé, système et dispositif de commande pour redémarrage après défaillance dans le domaine circuit - Google Patents

Procédé, système et dispositif de commande pour redémarrage après défaillance dans le domaine circuit Download PDF

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Publication number
WO2009094916A1
WO2009094916A1 PCT/CN2009/070070 CN2009070070W WO2009094916A1 WO 2009094916 A1 WO2009094916 A1 WO 2009094916A1 CN 2009070070 W CN2009070070 W CN 2009070070W WO 2009094916 A1 WO2009094916 A1 WO 2009094916A1
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WIPO (PCT)
Prior art keywords
call
circuit domain
fallback
user equipment
mobility management
Prior art date
Application number
PCT/CN2009/070070
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English (en)
French (fr)
Inventor
Ying Hu
Zhiming Yu
Zaifeng Zong
Minya Ye
Zhihai Wang
Original Assignee
Zte Corporation
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 Zte Corporation filed Critical Zte Corporation
Priority to US12/864,504 priority Critical patent/US20100302937A1/en
Priority to EP09706986A priority patent/EP2247039A4/en
Publication of WO2009094916A1 publication Critical patent/WO2009094916A1/zh

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W76/00Connection management
    • H04W76/10Connection setup
    • H04W76/18Management of setup rejection or failure
    • 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
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W8/00Network data management
    • H04W8/02Processing of mobility data, e.g. registration information at HLR [Home Location Register] or VLR [Visitor Location Register]; Transfer of mobility data, e.g. between HLR, VLR or external networks
    • H04W8/08Mobility data transfer
    • H04W8/12Mobility data transfer between location registers or mobility servers

Definitions

  • the present invention relates to the field of communications, and in particular, to a control method, system, and apparatus for circuit domain fallback.
  • Background Art In order to maintain the strong competitiveness of the third generation mobile communication system in the field of mobile communication, it is necessary to improve its network performance and reduce network construction and operation costs. Due to jt ⁇ , the 3rd Generation Partnership Project (3GPP) standardization working group is currently working on wireless access to Packet Switched Core (PS Core) and Global System for Mobile Communications. The evolution of the Universal Mobile Telecommunication System Radio Access Network (UTRAN) is designed to enable the evolved PS Core (Evolved PS Core, EPC for short) to provide higher transmission rates, shorter transmission delays, and support.
  • 3GPP 3rd Generation Partnership Project
  • EPC evolved PS Core
  • Evolved UTRAN Evolved UTRAN
  • GSMRAN GSM EDGE radio access network
  • GSM Global System for Mobile communications
  • EDGE is the abbreviation of Enhanced Data Rate for GSM Evolution, ie, enhanced data rate GSM evolution technology
  • UTRAN Wireless Local Area Network
  • WLAN Wireless Local Area Network
  • EPS Evolved Packet System
  • 1 is a block diagram of an EPS network system according to the related art. As shown in FIG. 1, a dashed box shows the basic architecture of the EPS. The description of each entity in FIG.
  • UE 101 User Equipment 101
  • a terminal having the capability of accessing two types of wireless networks is also called a dual mode terminal.
  • the dual mode terminal can be further divided into a single wireless channel access terminal and a dual wireless channel access terminal, wherein The former can only access one wireless network at the same time; the latter can access two wireless access networks at the same time.
  • E-UTRAN 102 an evolved radio access network, can provide higher uplink/downlink rates, lower transmission delays, and more reliable wireless transmission.
  • the network elements included in E-UTRAN are evolved sections.
  • Point B (Evolved NodeB, abbreviated as eNodeB) provides radio resources for terminal access.
  • a Serving Gateway (S-GW) 103 is a user plane entity that is responsible for routing data of user plane data.
  • a Packet Data Network Gateway (PDN GW or P-GW) 104 is used to implement a gateway function when the UE accesses a Packet Data Network (PDN), where P-GW and S -GW may be combined in one physical entity.
  • PDN Packet Data Network
  • Mobility Management Entity (MME) 105 which is a control plane entity, is a server for temporarily storing user data, and is responsible for managing and storing UE context (for example, UE/user identity, mobility management state, user security). The parameter, etc., allocates a temporary identifier to the user, and is responsible for authenticating the user when the UE is camped on the tracking area or the network.
  • UE context for example, UE/user identity, mobility management state, user security
  • the parameter, etc. allocates a temporary identifier to the user, and is responsible for authenticating the user when the UE is camped on the tracking area or the network.
  • the UE has the following three states in the EPS network: an isolated state, an idle state, and an active state.
  • the isolated state means that the UE is not currently in the EPS network; the idle state means that the UE is currently in the EPS network, and the signaling link between the UE and the MME has been released, and the S1-MME letter between the eNodeB and the MME The link is released, the S1-U user plane link between the eNodeB and the Serving GW is released, and the UE does not have an ongoing IP service at this time; the active state refers to the UE currently accessing the EPS network, and there is a letter between the UE and the MME.
  • the S1-MME signaling link exists between the eNodeB and the MME, and the S1-U user plane link exists between the eNodeB and the Serving GW.
  • the UE may have an ongoing Internet Protocol (IP). business.
  • the Home Subscriber Server (HSS) 106 which includes a Home Location Register (HLR) function, is used to store basic data and service data of the user.
  • IMS IP Multimedia Core Network Subsystem
  • EPS General Packet Radio Service
  • WLAN Wireless Local Area Network
  • the packet access network provides services, and can also provide services for mobile cellular networks such as GSM and Universal Mobile Telecommunications System (UMTS).
  • UMTS Universal Mobile Telecommunications System
  • GERAN UTRAN 107 Radio access network for legacy GSM UMTS networks.
  • MSC Mobile Switching Center
  • VLR Visitor Location Register
  • the GPRS Supporting Node (SGSN) 110 is a control network element of the GPRS network.
  • the main function is to record the location information of the UE, and the UE and the GPRS Gateway Support Node (Gateway GPRS Supporting Node, referred to as The transmission and reception of mobile packet data is completed between GGSNs.
  • GGSNs GPRS Gateway Support Node
  • the basic voice service of the user and the supplementary service based on the voice service are provided through a Circuit Switched (CS) domain (hereinafter referred to as a circuit domain).
  • CS Circuit Switched
  • the MSC/VLR and GMSC in 1 belong to the CS domain network element, and the user can perform voice call service through the CS or the user in the network or other network (for example, a fixed telephone network or other mobile network).
  • the user's IP service is provided through the Packet Switch (PS) domain.
  • PS Packet Switch
  • the SGSN belongs to the PS domain network element.
  • the user accesses the packet data network through the PS domain.
  • the IP network provided by the operator in FIG. 1 is a packet data network.
  • the interface between the MSC/VLR and the SGSN is called a Gs interface.
  • the Gs interface completes establishing a Gs association relationship between the MSC/VLR and the SGSN (the VLR number is saved in the SGSN, and the SGSN number is saved in the VLR), and the MSC/VLR pages the UE to the called user through the PS domain after establishing the Gs association relationship.
  • the UE accesses the EPS network
  • the basic voice service of the user and the supplementary service based on the voice service are controlled by the IMS.
  • the EPS system itself cannot provide and control the voice call service, and can only provide the bearer of the IP data.
  • 2 is a schematic diagram of specific coverage of an EPS network and a UMTS/GSM network according to the related art. As shown in FIG.
  • the newly introduced interface between the MME and the MSC/VLR may also be any extension based on the Gs interface principle.
  • the SGs interface, the Gs interface ⁇ table is uniformly used in the present invention.
  • the MME and the MSC/VLR establish a Gs association relationship through the Gs interface (the VLR number or address is stored in the MME, and the MME number or address is stored in the VLR).
  • the association relationship between the MME and the MSC/VLR may also be an arbitrary extension of the principle of the Gs association relationship, for example, an SGs association relationship or a Gs like association relationship. In the present invention, a Gs association relationship or a Gs association representation is uniformly used.
  • FIG. 3 is a flow chart of the entire signaling message when the UE is in the EPS network as the called user according to the related art. As shown in FIG.
  • the entire process of the user in the EPS network as the called party includes the following 301 to 317: 301, UE
  • the Gs association relationship has been established between the MME and the MSC/VLR, and the UE has registration information in the MSC/VLR and the MME.
  • the user of the UE has a call and the user is the called user.
  • the UMTS/GSM network CS domain network element GMSC in which the UE is located receives the initial address message (ie, the incoming call request).
  • the calling party of the incoming call request may be any type of user such as a fixed user or a mobile user.
  • the message carries the calling information such as the calling number (the user number that initiated the call) and the service type.
  • the GMSC analyzes the received initial address message, requests routing information from the HSS to which the called number belongs, and carries the calling number and the service type information in the request message. 303.
  • the HSS sends a request for providing a roaming number to the VLR of the user to obtain a roaming number.
  • the VLR allocates a roaming number and sends a roaming number response message to the HSS, where the response message carries the assigned roaming number.
  • the HSS sends a routing information response to the GMSC, where the response carries the obtained roaming number.
  • the GMSC analyzes the roaming number and connects the call to the MSC/VLR.
  • the MSC/VLR receives the initial address message of the call (ie, an incoming call request), where the initial address message carries the current call information (calling number and 307, the MSC/VLR receives the incoming call request, starts paging the UE of the called user, and according to the Gs association information stored in the VLR, the MSC/VLR sends a CS paging message to the MME ( The user permanently identifies the IMSI, the temporary identifier TMSI of the user in the VLR, location information);
  • the MME receives the CS paging request message sent by the MSC/VLR, starts paging the UE, and performs a call circuit domain fallback process. In this process, if the UE has an ongoing service, a PS handover occurs (or the EPS network is suspended/released, etc.), and the UE accesses from the GERAN UTRAN.
  • the specific call circuit domain fallback method and process in the prior art are shown in the figure. 4 and Figure 5;
  • the UE accesses the UMTS/GSM network, and the UE sends a CS paging response message to the MSC/VLR.
  • the MSC/VLR receives the CS paging response message sent by the UE, and starts a call setup process; 310, the MSC sends a call setup message to the UE;
  • the UE sends a call confirmation message to the MSC, and then the communication channel is established between the MSC, the radio access network, and the UE.
  • the UE rings and sends a ringing message to the MSC.
  • the MSC sends an address full message to the GMSC; 314, the GMSC forwards the address full message to the calling side;
  • the called user answers the call, and the UE sends a response message to the MSC.
  • the MSC sends a response message to the GMSC.
  • FIG. 4 is a signaling flow of a method for implementing a call circuit domain fallback at the time of termination in the prior art.
  • the paging request message of the CS domain is directly transmitted to the UE of the called user (ie, 401 to 403) through the MME and the eNodeB. After receiving the paging message, the UE starts to fall back in the call circuit domain.
  • the cell reselection is performed, and the CS terminal call process is performed in the CS field of the UMTS/GSM network (ie, 404) from the UMTS/GSM network.
  • the UE is currently active (in this case there may be ongoing IP traffic)
  • the ongoing IP traffic is switched to the PS domain of UMTS/GSM, and then the UE accesses from the UMTS/GSM network, on the UMTS/GSM network CS
  • the domain performs the CS termination process (ie, 404).
  • FIG. 5 is a signaling flow of another method for implementing a call circuit domain fallback in a terminal call in the prior art.
  • the MSC/VLR receives the incoming call request, and sends the CS paging request message to the MME through the Gs interface.
  • the MME determines that if the UE is currently in an active state (possibly having an ongoing IP service), the MME sends a CS paging request message to the eNodeB that is currently serving the UE.
  • the eNodeB After the UE and the eNodeB perform wireless signal measurement, the eNodeB sends a message to the MME to trigger the user's ongoing IP service handover to the UMTS/GSM PS domain (or in the EPS network suspension/suspension), when the UE switches to UMTS/GSM.
  • the CS terminal call process is performed in the CS domain of the UMTS/GSM network; if the UE is currently in an idle state (there is no ongoing IP service), the MME sends a CS page to one or more eNodeBs that may be UE monthly services.
  • each eNodeB that receives the message sends a CS paging message to the UE, and the UE receives the paging message, sends a message to the eNodeB in the current serving area, establishes a wireless connection, and then enters an active state, and thereafter, connects from the EPS network.
  • the incoming handover is a UMTS/GSM network, and the CS termination procedure is performed in the CS domain of the UMTS/GSM network.
  • the process includes the following 501 to 516:
  • the MSC/VLR sends a CS paging request to the MME.
  • the MME sends a paging request (CS domain paging indication) to the eNodeB.
  • the eNodeB may request the UE to send a measurement 4 report to determine that the PS switches to the GERAN UTRAN cell; 504.
  • the eNodeB sends a relocation request to the MME.
  • the MME sends a forward relocation request to the SGSN.
  • the SGSN sends a PS handover request to the GERAN UTRAN.
  • 507 Reserve a resource in the target wireless system GERAN UTRAN; 508, the GERAN UTRAN sends a PS handover request response to the SGSN;
  • the SGSN sends a forward relocation request response to the MME.
  • the MME sends a relocation command to the eNodeB.
  • the eNodeB sends a user equipment to the user equipment to switch from the eUTRAN to the GERAN UTRAN, and the user equipment is requested to access from the GERAN/UTRAN; 512, the user equipment accesses the process from the GERAN/UTRAN;
  • the GERAN UTRAN sends a PS handover completion operation to the SGSN.
  • the UE sends a CS paging response message to the GERAN UTRAN.
  • the GERAN UTRAN sends a CS paging response message to the MSC/VLR.
  • the UE interacts with the MSC to perform a CS termination call.
  • a CS termination call As described above, in the prior art, when the UE is the terminal of the called user in the EPS network,
  • the MSC/VLR can only page to the UE through the EPS network, but the call information such as the calling number and the service type cannot be notified to the UE. Only when the UE completes the call circuit domain fallback, accesses the UMTS/GSM network, and performs CS domain signaling interaction with the MSC/VLR, the MSC/VLR can provide the call information (calling number, service type, etc.) to the UE. Then, the user who is called when the UE rings can decide whether to answer the call according to the call information (calling number, service type, etc.) displayed on the mobile terminal.
  • the existing call circuit domain fallback technique has the following disadvantages: There is no option for the called circuit domain to fall back to the called user; when the terminal call is made, if the called user does not have an ongoing IP in the EPS network Service, let the UE fall back to the UMTS/GSM CS domain for voice call, the user does not feel, but when the user has IP service in progress, it will affect the phone (such as advertising, harassing phone, etc.) that some users do not want to answer now.
  • the business that is being carried out for example, games, videos, etc. that users like very much
  • the MSC/VLR In order to provide the called user with the right to decide whether to make the call circuit domain fall back, when the UE is in the EPS network, the MSC/VLR needs to be able to provide call information including the calling number and the service type to the UE through the EPS network, if the user When the decision is made to answer, the call circuit domain is dropped, otherwise the call circuit domain is not dropped. In this way, the following problems must be solved: How the MSC/VLR delivers the call information to the EPS network, how the call information is transmitted to the UE in the EPS network, and how the user decides whether to make the call circuit domain fallback selection information to the EPS network.
  • the problem cannot be solved because the existing Gs interface message cannot deliver the call information, and the paging response message does not carry the user's selection result. Therefore, there has not been proposed a technical solution that enables the user to select whether to perform circuit domain fallback.
  • SUMMARY OF THE INVENTION The present invention has been made in view of the related art in which the user cannot select whether to perform circuit domain fallback, that is, the problem that only the circuit domain fallback can be enforced. Therefore, the main object of the present invention is to provide a circuit domain fallback. Control mechanisms to solve the above problems.
  • a control method for circuit domain fallback is provided, which is applied to a scenario in which a calling user equipment initiates a call to a called user equipment in an evolved packet domain system network.
  • the control method for circuit domain fallback according to the present invention includes: the network element in the circuit domain that knows the call information of the current call notifies the mobility management entity of the call information; the mobility management entity notifies the called user equipment of the call information; The user equipment is called to determine whether to perform circuit domain fallback according to whether the user answers the call or a preset circuit domain fallback principle.
  • the mobile switching center/visit location register notifies the mobility management entity of the call information by carrying the call information in the circuit domain paging message of the Gs interface.
  • the network element is the user home server
  • the user home server notifies the call management information to the mobility management entity by carrying the call information in the interaction information between the user and the mobility management entity.
  • the foregoing method further includes: the called user equipment sends the indication information that allows the circuit domain to fall back to the fallback trigger network element capable of triggering the circuit or falling back to perform the circuit.
  • the fallback trigger network element includes a mobility management entity, an eNodeB.
  • the method further includes: the called user equipment sends an indication that the circuit domain is not dropped to the mobility management entity, and the mobility management entity sends the network to the network.
  • the element returns the reason why the called user equipment does not answer the call, or does not return any information to the network element. If it is determined according to the circuit domain fallback principle whether the call is to fall back in the circuit domain, the user is reminded of the call information by ringing or the like.
  • the above method may further include: the called user equipment prompts the user to select whether to perform the circuit domain fallback. .
  • the called user equipment can directly prompt the user whether to perform circuit domain fallback, and do not judge the circuit domain fallback principle.
  • the foregoing method further includes: after the circuit domain fallback is completed, the called user equipment does not prompt the user to answer the call.
  • the foregoing call information may include: a number of the calling user equipment, and a service type of the call.
  • a control method for circuit domain fallback is provided, which is applied to a scenario in which a calling user equipment initiates a call to a called user equipment in an evolved packet domain system network.
  • the control method for circuit domain fallback according to the present invention includes: the network element in the circuit domain that knows the call information of the current call notifies the mobility management entity of the call information; and the mobility management entity according to the preset circuit domain fallback principle Determining whether to perform circuit domain fallback; the mobility management entity sends the call information and the indication information of whether the current call is dropped in the circuit domain to the called user equipment.
  • the mobile switching center/visit location register notifies the mobility management entity of the call information by carrying the call information in the circuit domain paging message of the Gs interface.
  • the network element is the user home server, it is passed by the user home server.
  • the call information is carried in the interaction information between it and the mobility management entity to notify the mobility management entity of the call information.
  • the foregoing call information may include: a number of the calling user equipment, and a service type of the call.
  • a control system for circuit domain fallback is provided, which is applied to a scenario in which a calling user equipment initiates a call to a called user equipment in an evolved packet domain system network.
  • the circuit domain fallback control system according to the present invention includes: a mobile switching center/visit location register for notifying the call management information to the mobility management entity by carrying the call information of the call in the circuit domain paging message of the Gs interface.
  • a user home server configured to notify the mobility management entity of the call information by carrying the call information in the interaction information between the user and the mobility management entity; the mobility management entity, configured to notify the called user of the call information
  • the device and determining whether to perform circuit domain fallback according to a preset circuit domain fallback principle, and transmitting, to the called user equipment, whether the call is to be returned to the called user equipment; or according to whether the device is from the called user equipment Determining whether to perform circuit domain fallback in the circuit domain; the called user equipment is configured to determine, according to the circuit domain fallback principle or whether the user of the called user terminal responds, if the mobility management entity does not perform circuit domain fallback Whether to make the circuit domain fall back.
  • the call fallback principle may be set to the mobility management entity and/or the called user equipment.
  • a control device for circuit domain fallback is further provided, which is applied to a scenario in which a calling user equipment initiates a call to a called user equipment in an evolved packet domain system network.
  • the control device for circuit domain fallback includes: a forwarding module, configured to notify the mobility management entity of the call information of the current call, and forward the call information from the mobility management entity to the called user equipment; a decision module, configured with a circuit domain fallback principle, configured to determine whether to perform circuit domain fallback according to a circuit domain fallback principle or whether a user of the called user equipment answers the call; and a circuit domain fallback execution module, configured to fall back according to the circuit domain The decision of the decision module to perform the circuit domain fallback.
  • the forwarding module is located in a network element and/or a mobility management entity that learns the call information.
  • the network element includes: a mobile switching center/visit location register and/or a user home server.
  • the circuit domain fallback decision module is located at the called user equipment and/or the mobility management entity.
  • FIG. 1 is a block diagram of an EPS network system according to the related art
  • FIG. 2 is a schematic diagram of a specific coverage of an EPS network and a UMTS/GSM network according to the related art
  • FIG. 3 is a UE according to the related art.
  • FIG. 4 is a signaling flow of a method for implementing a call circuit domain fallback at the time of a call in the prior art, where the UE is in an active state on the EPS network.
  • the CS paging message is sent from the MSC/VLR to the UE.
  • FIG. 5 is a signaling flow of another method for implementing a call circuit domain fallback in a terminal call in the prior art, where the UE is in an active state on the EPS network.
  • the CS paging message is sent from the MSC/VLR to the eNodeB, and the eNodeB receives the CS paging message to trigger the call circuit domain fallback process.
  • FIG. 4 is a signaling flow of a method for implementing a call circuit domain fallback at the time of a call in the prior art, where the UE is in an active state on the EPS network.
  • the CS paging message is sent from the MSC/VLR to the eNodeB, and the
  • FIG. 6 is a flowchart of the circuit domain fallback control method according to the first embodiment of the method of the present invention.
  • Figure 7 is a signaling flow chart of a signaling delivery process in the case where the call information is notified by the MSC/VLR in the method according to the first embodiment of the method of the present invention;
  • Figure 8 is an embodiment of the method according to the present invention.
  • MSC FIG. 9 is a flowchart of the UE deciding to perform call circuit domain fallback when the call information is notified by the VLR;
  • FIG. 9 is a case where the UE decides not to perform the call information by the MSC/VLR in the method according to the first embodiment of the method of the present invention.
  • FIG. 10 is a diagram of the call information notified by the HSS in the method according to the first embodiment of the method of the present invention.
  • the MME directly returns a signaling flowchart of the response message to the HSS;
  • FIG. 11 is a diagram of the UE in the case where the call information is notified by the HSS in the method according to the first embodiment of the method of the present invention.
  • the MME forwards the corresponding message including the call information to the UE, and the UE performs a signaling flow chart of the call circuit domain fallback.
  • FIG. 12 is the HSS notification in the method according to the first embodiment of the method.
  • FIG. 13 is a flowchart of the control method of the circuit domain fallback according to the second embodiment of the method according to the present invention
  • FIG. 14 is a signaling flowchart of determining whether to perform circuit domain fallback by the MME according to the method in the second embodiment of the method of the present invention
  • FIG. 15 is a method for determining a call circuit by the MME according to the method in the second embodiment of the method of the present invention. Detailed signaling processing flowchart of the domain fallback;
  • FIG. 14 is a signaling flowchart of determining whether to perform circuit domain fallback by the MME according to the method in the second embodiment of the method of the present invention.
  • FIG 16 is a flowchart of detailed signaling processing by the MME in the method according to the second embodiment of the method of the present invention, which does not perform call circuit or fallback;
  • FIG 17 is a block diagram of a control apparatus of a circuit domain fall embodiment of an apparatus according to the present invention.
  • DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In view of the related art, if it is necessary to implement control of circuit domain fallback, it is necessary to transmit the information to the EPS network by a circuit domain network element that already knows call information such as a calling number and a service type. After that, the call information can be transmitted to the user within the EPS network to determine or determine whether the call is to fall back in the circuit domain according to rules preset by the user.
  • the embodiment of the present invention provides an improved control mechanism for circuit domain fallback, by modifying the CS paging message of the existing Gs interface between the MSC/VLR and the MME, or modifying the interface between the HSS and the MME.
  • the information is added between the HSS and the MME to transmit call information such as the calling number and the service type to the MME, and the MME transmits the call information to the UE.
  • whether the call circuit domain fallback is performed is performed by performing a signaling interaction process between the MME and the UE. You can decide whether to make a call circuit or fall back in the following two ways:
  • Method Embodiment 1 According to an embodiment of the present invention, a control method for circuit domain fallback is provided, which is applied to a scenario in which a calling UE initiates a call to an evolved packet or a called UE in a system network.
  • 6 is a flow chart of a method for controlling a circuit domain fallback according to Embodiment 1 of the method of the present invention, as shown in FIG.
  • control method of the circuit domain fallback in this embodiment includes the following 602 to 606:
  • the mobility management entity notifies the called UE of the call information. 606.
  • the called UE determines whether to perform circuit domain fallback according to whether the user answers the call or a preset circuit domain fallback principle.
  • the network element is a mobile switching center/visit location register (MSC/VLR)
  • MSC/VLR mobile switching center/visit location register
  • the HSS notifies the mobility management entity of the call information by carrying the call information in the interaction information between it and the mobility management entity.
  • the method further includes: the called user equipment sends the indication information that allows the circuit domain to fall back to the fall trigger that can trigger the circuit domain fallback.
  • the network element is configured to perform circuit domain fallback, where the fallback trigger network element includes an MME and an eNodeB.
  • the method further includes: the called user equipment sends an indication that the circuit domain is not dropped to the mobility management entity; the mobility management entity sends the network element to the network element Returns the reason why the called user equipment does not answer the call, or does not return any information to the network element.
  • the method may further include: the called UE prompts the user to select whether to perform circuit domain fallback. Moreover, it is also possible to directly prompt the user whether to perform circuit domain fallback, and not to judge according to the circuit domain fallback principle.
  • the method may further include: after the circuit domain fallback is completed, the called UE does not prompt the user to answer the call, that is, avoid prompting the user twice during one call.
  • the foregoing call information may include: a number of the calling UE, and a service type of the call.
  • FIG. 7 shows the signaling flow of the call information (calling number and service type) transmitted from the MSC/VLR to the MME, the transfer of call information between the MME and the UE, and the determination of whether to make a call circuit or fall back, as shown in Figure 7.
  • the details may include the following 701 to 705: 701.
  • the UE establishes a Gs association relationship between the MME and the MSC/VLR in the EPS network access.
  • the user of the UE has a call and the user is the called user.
  • the MSC/VLR receives the initial address message (ie, the incoming call request) of the call, and the message carries the call information (calling number, service type, etc.).
  • the calling party of the incoming call request may be any type of user such as a fixed user or a mobile user.
  • the MSC/VLR receives an incoming call request, and starts paging the UE.
  • the MSC/VLR sends a CS paging request message to the MME according to the Gs association information stored in the VLR.
  • the CS paging request message needs to add a new parameter to indicate the current call information: the calling number and the service type;
  • the MME receives the CS paging message, and delivers the current call information (calling number and service type) to the UE by using a related signaling message.
  • the sending manner may be adding a dedicated signaling message or an existing letter. Add parameters to the message (for example, paging message paging, etc.);
  • the UE receives the current call related information from the MME.
  • the first method is based on whether the user answers the action. When the UE receives the message from the MME, it prompts the user to wait for the user to answer the call. If the user answers the call, the UE receives the operation information of the user to generate the indication information for the call circuit domain to fall back; otherwise, the user does not want to answer the call. Including the rejection and the user no response, etc., the UE generates indication information that the call circuit domain is not dropped.
  • the second method is that the UE decides according to the principle of the call circuit domain fallback preset by the user in itself.
  • the UE After receiving the message of the MME, the UE decides whether to perform the call circuit domain fallback according to the call circuit domain fallback principle and the current call information saved by itself. If the current call meets the user's preset fallback principle, the UE generates indication information for performing the call circuit domain fallback; otherwise, the UE generates indication information that does not perform the call circuit domain fallback and prompts the user for the current call information.
  • the UE when the current call does not meet the user's preset fallback principle, the following can also be implemented: The UE prompts the user for the current call information, and then determines according to the user's operation, that is, the first implementation method.
  • the UE transmits information about whether the call performs circuit domain fallback to the MME.
  • the delivery mode may be to transmit whether the call performs the circuit domain fallback indication information by adding a dedicated signaling message or adding a parameter to the existing message.
  • Figure 8 is a diagram showing the call progressing circuit when the MSC/VLR notifies the call information.
  • the signaling flow of the domain fallback through the figure and the following flow description, shows how to complete the user decision call circuit domain fallback and fallback and terminal call flow by using the present invention, which mainly includes the following 801 to 809:
  • 801 to 805 are the same as 701 to 705 described above, and are not described herein again;
  • the UE or the MME or the eNodeB triggers the call circuit or the fallback process, and performs the fallback according to the call circuit or the fallback method (for example, the call circuit or the fallback method shown in FIG. 4 and FIG. 5), and the UE is accessed from the GERAN UTRAN network after the backhaul. .
  • the UE needs to send a message to the eNodeB and the MME to inform the call circuit domain to fall back and other information in 805. Otherwise, the UE may not send a message to the eNodeB and the MME;
  • the UE sends a message to the GERAN UTRAN, and includes a CS paging response message in the message;
  • the GERAN UTRAN sends a message to the MSC/VLR, and includes a CS paging response message in the message.
  • the MSC/VLR receives the CS paging response message, and starts the CS termination call process. It is a little different from the CS termination procedure in the prior art: if the UE judges that the user has been prompted in 804, the UE is no longer prompted to avoid the user being reminded twice during a call.
  • 9 is a signaling flow in which the user decides that the call does not perform circuit domain fallback in the case where the MSC/VLR notifies the call information, and the following description of the flow and the following flow shows how the user determines that the call is not made to fall back in the circuit domain and
  • the subsequent call release process mainly includes the following 901 to 907:
  • 901 to 905 are the same as 701 to 705 described above, and are not described herein again;
  • the MME sends a message to the MSC/VLR, which may be an existing message of the Gs port, "User is inaccessible", carrying a new reason, indicating that the user does not want to answer the call or sending a new message indicating that the circuit is rejected or the call is dropped, or the like; or MME The message is not released to the MSC/VLR by the network element timeout;
  • FIG. 11, and FIG. 12 are signaling flows in which the call information is notified by the HSS, and the UE decides whether to perform call circuit domain fallback.
  • Figure 10 shows the signaling flow of the MME directly returning a response message to the HSS when the UE is in the detached state or the idle state. As shown in Figure 10, the following includes 1001 to 1008:
  • the GMSC receives the initial address message (ie, the incoming call request), and requests routing information from the HSS, and the request message currently carries the calling number and the service type information.
  • the calling party of the incoming call request may be any type of user such as a fixed user or a mobile user.
  • the HSS checks whether the user has registration or subscription information of the UMTS/GSM CS and the EPS network, and sends an inquiry message to the MME, where the inquiry message carries call information such as a calling number and a service type.
  • the MME determines that the UE is in an isolated state, or is in an idle state, and the idle state policy is to allow the call circuit domain to fall back.
  • the MME directly sends a response message to the HSS, and carries the information of the allowed call in the response message.
  • the HSS obtains the roaming number from the VLR where the user is located and sends it to the GMSC.
  • FIG. 11 shows a signaling process in which the MME forwards a call to the UE when the UE is in an active or idle state, and the user answers the incoming call or decides to perform the call circuit domain fallback according to a preset principle.
  • the following specifically includes 1101 to 1113:
  • the GMSC receives the initial address message (ie, the incoming call request), and requests routing information from the HSS, and the request message currently carries the calling number and the service type information.
  • the master of the incoming call request The calling party can be any type of user such as a fixed user or a mobile user;
  • the HSS checks that the user has the registration or subscription information of the UMTS/GSM CS and the EPS network, and sends an inquiry message to the MME, where the inquiry message carries call information such as a calling number and a service type;
  • the MME determines that the UE is in an active state (there may be IP services in progress), or the UE is in an idle state and the idle state policy is to ask the user or decide according to the user's fallback principle. Whether the call circuit domain is dropped, and the MME forwards the inquiry message to the UE;
  • the UE displays the inquiry message to the user and waits for the user to respond.
  • the user allows the call to be established or the UE determines the call to perform the circuit domain fallback according to the rule set and saved by the user in advance, and then the UE sends a response message to the MME, and in the response message. Carrying the information of the allowed call; 1106, the MME forwards the response message to the HSS;
  • the HSS obtains the roaming number from the VLR where the user is located and sends the roaming number to the GMSC;
  • FIG. 12 illustrates a process in which the MME forwards a corresponding message to the UE when the UE is in an active or idle state, and the user rejects the incoming call or the UE decides not to perform the circuit domain fallback according to the rules preset by the user, including the process.
  • the GMSC receives the initial address message (ie, the incoming call request), and requests routing information from the HSS, where the request message currently carries the calling number and the service type information; wherein, the incoming call
  • the calling party of the request may be any type of user such as a fixed user or a mobile user;
  • the HSS checks that the user has registration or subscription information of the UMTS/GSM CS and the EPS network, and sends an inquiry message to the MME, where the inquiry message carries call information such as a calling number and a service type;
  • the MME determines that the UE is in an active state (there may be an IP service in progress), or the UE is in an idle state, and the idle state policy is to query the user or decide whether to perform the call circuit domain fallback according to the fallback principle set by the user, and the MME sends the UE to the UE. Forward the inquiry message;
  • the UE displays the inquiry message to the user and waits for the user to respond.
  • the user rejects the call, or according to the user's preset fallback principle, the UE decides that the user does not need to perform the fallback.
  • the UE sends a response message to the MME, where the response message carries the information of the rejected call;
  • the MME forwards a response message to the HSS. 1207. After receiving the response message, the HSS sends a routing information failure response to the GMSC.
  • FIG. 13 is a flowchart of a control method of circuit domain fallback according to Embodiment 2 of the method according to the present invention. As shown in FIG. 13, the control method for circuit domain fallback in this embodiment includes the following 1302 to 1306:
  • the circuit or the network element that knows the call information of the call initiated by the calling UE to the called UE notifies the mobility management entity of the call information; 1304, the mobility management entity determines whether to proceed according to a preset circuit domain fallback principle. The circuit domain falls back;
  • the mobility management entity sends the call information and the indication information of whether the current call is dropped in the circuit domain to the called UE.
  • the MSC/VLR notifies the mobility management entity of the call information by carrying the call information in the circuit domain paging message of the Gs interface.
  • the call information is notified to the mobility management entity by the HSS by carrying the call information in the interaction information between it and the mobility management entity.
  • the foregoing call information may include: a number of the calling UE, and a service type of the call. 14 , FIG. 15 and FIG.
  • Fig. 14 is a flowchart showing a brief process of the case where the call information is notified by the MSC/VLR. The diagram and the following flow description show how the user can determine the call circuit domain fallback and subsequent call release using the present invention. As shown in FIG.
  • the UE has established a Gs association relationship between the MME and the MSC/VLR in the EPS network, the user of the UE has a call, and the user is The user being called.
  • MSC/VLR Receiving an initial address message (ie, an incoming call request) of the call, where the initial address message carries call information (calling number, service type, etc.), and the calling party of the incoming call request may be a fixed user or a mobile user. Any type of user;
  • the MSC/VLR receives an incoming call request and starts paging the UE.
  • the MSC/VLR sends a CS paging message to the MME according to the Gs association information stored in the VLR.
  • the paging message needs to add parameters to indicate the current call information: the calling number and the service type;
  • the MME receives the CS paging message, and determines whether the call needs to be rolled back according to the call circuit domain fallback principle preset by the user and the current call information. If the call satisfies the fallback principle, the call circuit domain needs to be dropped; otherwise, the call circuit domain does not need to fall back;
  • the MME transmits the current call information and information about whether the current call is circuited or dropped to the UE.
  • the delivery mode may be represented by adding a dedicated signaling message or adding a parameter in the existing signaling message (calling number and service type, whether the call is going to fall back in the circuit domain, etc.); 1405, the UE receives the message. If the call does not fall back in the circuit domain, the UE prompts the user for the current call information, otherwise the user is not reminded.
  • Figure 15 shows the case where the MSC/VLR notifies the call information that the MME decides to make the call or fall back, the call information (calling number and service type) is transferred from the MSC/VLR to the MME, and then between the MME and the UE.
  • the signaling flow for delivering call information As shown in Figure 15, the following includes 1501 to 1508:
  • 1501 to 1504 are the same as 1401 to 1404 described above, and are not described herein again;
  • the UE or the MME or the eNodeB triggers the call circuit or the fallback process, and performs the fallback according to the call circuit or the fallback method (for example, the call circuit or the fallback method shown in FIG. 4 and FIG. 5), and the UE is connected from the GERAN/UTRAN network after the backhaul.
  • the UE sends a message to the GERAN/UTRAN, where the message includes a CS paging response message.
  • the GERAN/UTRAN sends a message to the MSC/VLR, where the message includes a CS paging response message; 1508, the MSC/VLR connects to the CS paging response message, and starts the CS termination call.
  • Figure 16 is a signaling flow in the case where the MSC/VLR notifies the call information that the MME decides that the call does not fall back. Through the figure and the following flow description, the completion user determines that the call does not perform the circuit domain fallback and the subsequent call release process. As shown in Figure 16, it specifically includes the following 1601 to 1605:
  • 1601 to 1603 are the same as 1401 to 1403 described above, and are not mentioned in jt ⁇ ;
  • 1604-1, 1605-1 and 1604-2, 1605-2 may be executed in parallel or in sequential order;
  • the MME sends a message to the MSC/VLR, which may be the message "The user is inaccessible" of the Gs port.
  • the new reason indicates that the user does not want to answer the call or sends a new message indicating that the circuit domain fallback call is released. Or, the MME does not send a message to the MSC/VLR, and the MSC/VLR times out to release the call;
  • the MSC/VLR receives the message and starts the call release process
  • the MME transmits the current call information and whether the current call is circuited or dropped to the UE.
  • the delivery mode may be represented by adding a dedicated signaling message or adding a parameter to the existing signaling message (where the call information includes: the calling number and the service type, whether the call is to fall back in the circuit domain, etc.);
  • the UE receives the message and prompts the user for the current call.
  • the call information can also be forwarded by the HSS, wherein the process of forwarding the call information is as described above with respect to FIGS. 11 and 12.
  • the processing procedure in the case where the HSS forwards the call information is similar, and the subsequent processes shown in FIGS. 11, 12, 14, 15, and 16 may also be used in the subsequent process, and are not repeated here.
  • a control system for circuit domain fallback is provided, which is applied to a scenario in which a calling user equipment initiates a call to a called user equipment in an evolved packet domain system network.
  • the circuit domain fallback control system can be implemented by the architecture shown in FIG. 1.
  • the circuit domain fallback control system according to the embodiment of the present invention includes: MSC/VLR 108, HSS 106, The MME 105 and the called user equipment 101 are described below.
  • the MSC/VLR 108 is configured to notify the MME 105 of the call information by carrying the call information of the call initiated by the calling user equipment to the called user equipment 101 in the circuit domain paging message of the Gs interface; the HSS 106 is configured to pass The call information is carried in the interaction information between the MME 105 and the MME 105 to notify the MME 105 of the call information.
  • the MME 105 is configured to notify the called user equipment 101 of the call information, and according to a preset circuit domain fallback principle. Determining whether to perform the circuit domain fallback, and transmitting the indication information of whether the current call is falling back to the called user equipment 101; or determining whether to perform the circuit domain according to whether the circuit user equipment 101 is instructed to perform the circuit domain fallback.
  • the user equipment 101 is used to determine whether the circuit user equipment 101 is in the circuit domain fallback principle or whether the user of the called user terminal 101 responds to determine whether to perform the circuit domain in the case that the MME 105 does not determine whether to perform the circuit domain fallback. Fall back.
  • the call information may include: a number of the calling user equipment, and a service type of the call.
  • the call dropback principle is set on the mobility management entity and/or the called user equipment, that is, the call fallback principle may be set on the MME and the UE, or may be set on the MME or the UE.
  • a control apparatus for circuit domain fallback is provided, which is applied to a scenario in which a calling user equipment initiates a call to a called user equipment in an evolved packet domain system network.
  • Figure 17 is a block diagram of a control device for circuit domain fallback according to an embodiment of the apparatus of the present invention, as shown in the figure
  • the control device for circuit domain fallback includes: a forwarding module 1702, a circuit domain fallback decision module 1704, and a circuit domain fallback execution module 1706, which are described below.
  • the forwarding module 1702 is configured to notify the MME of the call information of the call initiated by the calling user equipment to the called user equipment, and forward the call information from the MME to the called user equipment; and the circuit domain fallback decision module 1704
  • There is a circuit domain fallback principle which is used to determine whether to perform circuit domain fallback according to the circuit domain fallback principle or whether the user of the called user equipment answers the call
  • the circuit domain fallback execution module 1706 is configured to determine the decision according to the circuit domain fallback decision module 1704. The execution circuit domain falls back.
  • the forwarding module 1702 is located in the network element and/or the MME that knows the call information. And above The network elements include: MSC/VLR and/or HSS. Additionally, the circuit or fallback decision module 1704 can be located at the called user equipment and/or MME. In summary, with the technical solution of the present invention, it is possible to control the call circuit domain fallback performed by the user when the EPS network is called, thereby ensuring the availability of the EPS network service and improving the user satisfaction. And can reduce the invalid occupation of UMTS/GSM network resources.
  • the above 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.

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Description

电路域回落的控制方法、 系统、 及装置 技术领域 本发明涉及通信领域,并且特别地, 涉及电路域回落的控制方法、 系统、 及装置。 背景技术 为了保持第三代移动通信系统在移动通信领域的强有力的竟争力,必须 提高其网络性能并降低网络建设和运营成本。 因 jt匕, 第三 合作伙伴计划( 3rd Generation Partnership Project , 简称为 3GPP ) 的标准化工作组目前正致力研究对分组交换核心网 ( Packet Switched Core, 简称为 PS Core ) 和全球移动通信系统无线接入网 (Universal Mobile Telecommunication System Radio Access Network, 简称为 UTRAN ) 的演进, 目的是使得演进的 PS Core ( Evolved PS Core, 简称为 EPC ) 可以提供更高 的传输速率, 更短的传输延时, 并且支持演进的 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 是 Global System for Mobile communications的缩写,即,全球移动通信系统, EDGE是 Enhanced Data Rate for GSM Evolution的缩写, 即, 增强型数据速率 GSM演进技术)、 UTRAN, 无线局或网 ( 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系统, 就被称为演进的 分组或系统 ( Evolved Packet System , 简称为 EPS )。 图 1是根据相关技术的 EPS网络系统的框图, 如图 1所示, 虚线框示 出了 EPS的基本架构, 对于图 1中各实体的说明如下: 用户设备(User Equipment, 简称 UE ) 101 , 具有能够接入两种无线网 络能力的终端, 又称为双模终端, 按照同时接入无线网络的能力, 双模终端 又可以分为单无线信道接入终端和双无线信道接入终端, 其中, 前者在同一 时间只能接入一种无线网络; 后者可以同时接入到两种无线接入网络中。
E-UTRAN 102, 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 中包含的网元是演进的节 点 B ( Evolved NodeB , 简称为 eNodeB ), 为终端的接入提供无线资源。 月 务网关 (Serving Gateway, 简称 S-GW ) 103 , 是一个用户面实体, 用于负责用户面数据的路由处理。 分组数据网网关 (Packet Data Network Gateway, 简称 PDN GW 或 P-GW ) 104, 用于实现 UE接入分组数据网 ( Packet Data Network, 简称为 PDN ) 时的网关功能, 其中, P-GW和 S-GW可能合设在一个物理实体中。 移动性管理实体(Mobility Management Entity, 简称 MME ) 105, 是控 制面实体, 是用于临时存储用户数据的服务器, 负责管理和存储 UE上下文 (例如, 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。 与本文相关地, UE在 EPS网络有以下 3个状态: 分离态、 空闲态、 和 活动态。 其中, 分离态是指 UE当前没有在 EPS 网^^妻入; 空闲态是指 UE 当前在 EPS 网络接入, 并且 UE和 MME之间信令链接已经释放, eNodeB 和 MME之间 S1-MME信令链路释放, eNodeB和 Serving GW之间 S1-U用 户面链路释放, UE这时没有正在进行的 IP业务; 活动态指的是 UE当前在 EPS网络接入, UE和 MME之间有信令链接, eNodeB和 MME之间 S1-MME 信令链路存在, eNodeB和 Serving GW之间 S1-U用户面链路存在, UE可能 有正在进行的互联网十办议 ( Internet Protocol, 简称为 IP ) 业务。 归属用户服务器 (Home Subscriber Server, 简称为 HSS ) 106, 包含归 属位置寄存器 ( Home Location Register, 简称 HLR ) 功能, 用于保存用户的 基本数据和业务数据。
IP多媒体子系统( IP Multimedia Core Network Subsystem, 简称为 IMS ) 是由 3GPP提出的一种基于 IP的网络架构, 其构建了一个开放而灵活的业务 环境, 支持多媒体应用, 并为用户提供丰富的多媒体业务。 IMS 是基于 IP 的电信网络架构, 与接入技术无关, 除了可以为 EPS、 通用分组无线业务 ( General Packet Radio Service, 简称为 GPRS )、 无线局或网 ( Wireless Local Area Network, 简称为 WLAN )等分组接入网络提供业务外,也可以为 GSM、 通用移动通信系统 ( Universal Mobile Telecommunications System , 简称为 UMTS ) 等移动蜂窝网络提供业务。 GERAN UTRAN 107: 传统 GSM UMTS网络的无线接入网。 移动交换中心( Mobile Switching Center, 简称为 MSC ) /拜访位置寄存 器 (Visitor Location Register, 简称为 VLR ) 108, 通常, 在实际实现和布网 时, MSC 和 VLR 这个两个還辑分开的单元是一个合设的物理节点, 该 MSC/VLR也可以是在 R4阶段后的新功能实体 MSC Server, 在本发明中统 一用 MSC/VLR代表。 关口移动交换中心 ( Gateway Mobile Switching Center, 简称为 GMSC )
109。
GPRS月 务支持节点( Serving GPRS Support Node, 简称为 SGSN ) 110, 是 GPRS网络的控制网元, 主要作用是记录 UE的位置信息, 并且在 UE和 GPRS网关支持节点( Gateway GPRS Supporting Node, 简称为 GGSN )之间 完成移动分组数据的发送和接收。 当 UE在 GSM UMTS网 ^^妻入时, 用户的基本语音业务以及基于语音 业务的补充业务是通过电路交换( Circuit Switched, 简称为 CS )域(下文中 将其称为电路域)提供, 图 1中的 MSC/VLR、 GMSC属于 CS域网元, 用户 通过 CS 或可以与本网内或者其它网络(例如, 固定电话网、 其它移动网) 的用户进行语音呼叫类业务。 用户的 IP业务通过包交换( Packet Switch , 简 称为 PS ) 域提供。 图 1 中 SGSN属于 PS域网元。 用户通过 PS域来访问分 组数据网, 图 1中运营商提供的 IP网络就是分组数据网。 在现有技术中, MSC/VLR和 SGSN之间的接口称为 Gs接口。 Gs接口 完成在 MSC/VLR与 SGSN之间建立 Gs关联关系(在 SGSN保存 VLR号码, 在 VLR保存 SGSN号码), 以及在建立 Gs关联关系后 MSC/VLR通过 PS域 寻呼到被叫用户的 UE。 当 UE在 EPS网络接入时,用户的基本语音业务以及基于语音业务的补 充业务是通过 IMS控制的, EPS系统本身并不能提供和控制语音呼叫业务, 只能提供 IP数据的承载。图 2是根据相关技术的 EPS网络与 UMTS/GSM网 络的具体覆盖情况的示意图, 如图 2所示, 在 EPS网络部署时, 有些运营商 只在 UMTS/GSM网络已经覆盖的重点区域部署 EPS网络, 从而为用户提供 高速的 IP数据业务, 通常没有或者不想部署 IMS。 在这种场景下, 希望语音 呼叫业务能够并且只能通过已经全面覆盖的 UMTS/GSM 网络的 CS域来提 供。 此时, 对于单无线信道的双模终端而言, 当接入 EPS 网络时, 用户就 无法进行语音呼叫业务, 为了保证用户能够进行语音呼叫, 目前较为简单的 也是 3GPP现阶段唯一支持的解决方案是,在进行语音呼叫时,让 UE从 EPS 网^^妻入切换为从 UMTS/GSM网^^妻入,在 UMTS/GSM网络 CS域来实现 语音业务;用户在 EPS网络当前正在进行的 IP业务切换到 UMTS/GSM网络 PS域, 如果正在进行的 IP业务不能切换到 UMTS/GSM PS域, 就在 EPS网 络中挂起或者释放。 这就是通常所说的呼叫电路域回落 (CS fallback, 或者 称为 CS回落)。 现有的呼叫电路或回落实现方法大致如下: 在 MME和 MSC/VLR之间 引入一个类似 Gs的接口, 称为 Gs like (如图 1中所示)。 MME和 MSC/VLR 之间新引入的接口也可以是基于 Gs接口原理的任意扩展, 例如, SGs接口, 在本发明中统一使用 Gs接口^ ^表。 当 UE开机接入 EPS 网络时, MME和 MSC/VLR之间通过 Gs接口建立 Gs关联关系(在 MME中保存 VLR号码或 者地址,在 VLR中保存 MME号码或者地址)。 MME和 MSC/VLR之间的关 联关系也可以 ^^于 Gs 关联关系原理的任意扩展, 例如, SGs 关联关系或 者 Gs like关联关系, 在本发明中统一使用 Gs关联关系或者 Gs关联代表。 后续当用户在网络中移动时, 用户的最新位置信息会更新到 MME , 如果 MME发生变化, VLR中保存的 MME信息也会更新, 以保证 VLR中保存的 MME信息的准确性。 在进行语音呼叫时, 如果被叫用户是在 EPS 网络接入, 贝l MSC/VLR 接收到入呼请求后, 通过 Gs接口给 EPS 网络发 CS寻呼消息, EPS网络接 收到 CS寻呼请求消息, 进行呼叫电路域回落。 图 3是根据相关技术的 UE 在 EPS网络作为被呼叫的用户时的整个信令消息流程, 如图 3所示, 用户在 EPS网络作为被叫的整个流程包含如下的 301至 317: 301 , UE在 EPS网 ^^妻入, MME和 MSC/VLR之间已经建立了 Gs关 联关系, UE在 MSC/VLR和 MME中都有注册信息。 UE的用户有一个呼叫, 并且该用户是被呼叫的用户。 UE所在的 UMTS/GSM网络 CS域网元 GMSC 接收到初始地址消息(即,入呼请求)。该入呼请求的主叫方可以是固定用户、 移动用户等任意类型的用户。 该消息中携带了主叫号码 (发起呼叫的用户号 码) 和业务类型等本次呼叫信息;
302, GMSC分析接收到的初始地址消息, 向被叫号码归属的 HSS请求 路由信息, 并在请求消息中携带主叫号码和业务类型信息; 303 , HSS 向用户所在 VLR发送提供漫游号码请求消息, 以获取漫游 号码;
304, VLR分配漫游号码并给 HSS发送提供漫游号码响应消息, 该响 应消息中携带有所分配的漫游号码; 305 , HSS向 GMSC发送路由信息响应, 该响应中携带有获取到的漫游 号码;
306, GMSC分析漫游号码并将呼叫接续到 MSC/VLR, MSC/VLR接收 到该呼叫的初始地址消息(即, 入呼请求), 该初始地址消息中携带有本次呼 叫信息 (主叫号码和业务类型等); 307, MSC/VLR接收到入呼请求, 开始寻呼被叫用户的 UE, 才艮据 VLR 中保存的 Gs关联关系信息等, MSC/VLR给 MME发送一个 CS寻呼消息(用 户永久标识 IMSI、 用户在本 VLR的临时标识 TMSI、 位置信息);
308 , MME接收到 MSC/VLR发送来的 CS寻呼请求消息, 开始寻呼 UE, 进行呼叫电路域回落过程。 在该过程中, UE如果有正在进行的业务就 发生 PS切换(或者在 EPS网络挂起 \释放等), UE从 GERAN UTRAN接入, 现有技术中具体的呼叫电路域回落方法和过程见图 4和图 5;
309, 呼叫电路域回落过程完成后, UE在 UMTS/GSM 网络接入, UE 给 MSC/VLR发送 CS寻呼响应消息。 MSC/VLR接收到 UE发送来的 CS寻 呼响应消息, 开始呼叫建立过程; 310, MSC给 UE发送呼叫建立消息;
311 , UE给 MSC发送呼叫证实消息, 之后 MSC、 无线接入网、 UE之 间完成通信通道的建立;
312, UE振铃, 并给 MSC发送振铃消息;
313 , MSC给 GMSC发送地址全消息; 314, GMSC转发地址全消息给主叫侧;
315 , 被叫用户接听电话, UE给 MSC发送应答消息; 316, MSC给 GMSC发送应答消息;
317, GMSC转发应答消息给主叫侧, 呼叫双方通话。 现有技术中有两种寻呼 UE和进行呼叫回落到电路域的方法: 图 4是现有技术中一种终呼时的呼叫电路域回落实现方法的信令流程。 如图 4所示,是通过将 CS域的寻呼请求消息通过 MME和 eNodeB—直发送 到被叫用户的 UE (即, 401至 403 )。 UE接收到该寻呼消息后, 开始进行呼 叫电路域回落。 如果 UE当前处于空闲态(这时没有正在进行的 IP业务)就 进行小区重选, 从 UMTS/GSM 网^^妻入, 在 UMTS/GSM 网络 CS域进行 CS终呼流程(即, 404 ); 如果 UE当前处于活动态(这时可能有正在进行的 IP业务), 就将正在进行的 IP业务切换到 UMTS/GSM的 PS域, 然后 UE从 UMTS/GSM网络接入, 在 UMTS/GSM网络 CS域进行 CS终呼流程 (即, 404 )。 此后, UE经由 UMTS/GSM网络向 MSC/VLR返回电路交换寻呼响应 (即, 405至 406 )。 图 5 为现有技术中另一种终呼时的呼叫电路域回落实现方法的信令流 程。 如图 5所示, 是 MSC/VLR接收到入呼请求, 将 CS寻呼请求消息通过 Gs口发送给 MME。 MME接收到 CS寻呼请求消息后, 判断如果 UE当前处 于活动态 (可能有正在进行的 IP业务), 就将 CS寻呼请求消息发送给当前 正在为 UE月^务的 eNodeB。 UE和 eNodeB等进行无线信号测量后,由 eNodeB 给 MME发送消息触发用户当前正在进行的 IP业务切换到 UMTS/GSM PS 域(或者在 EPS网络挂起 /暂停), 当 UE切换为从 UMTS/GSM网络接入后, 在 UMTS/GSM网络 CS域进行 CS终呼流程; 如果 UE当前处于空闲态 (没 有正在进行的 IP业务), MME给一个或者多个可能为 UE月 务的 eNodeB发 送 CS寻呼消息, 每个接收到消息的 eNodeB给 UE发送 CS寻呼消息, UE 接收到寻呼消息, 给当前所在服务区域的 eNodeB发送消息, 建立无线连接 等, 然后进入活动态, 此后, 从 EPS网络接入切换为 UMTS/GSM网络, 在 UMTS/GSM网络 CS域进行 CS终呼流程。 该流程包括如下的 501至 516:
501 , MSC/VLR向 MME发送 CS寻呼请求;
502, MME向 eNodeB发送寻呼请求 ( CS域寻呼指示 );
503 , eNodeB 可能请求 UE 发送测量 4艮告来决定 PS 切换到那个 GERAN UTRAN小区; 504, eNodeB向 MME发送重定位请求;
505 , MME向 SGSN发送前转重定位请求;
506, SGSN向 GERAN UTRAN发送 PS切换请求;
507, 在目标无线系统 GERAN UTRAN中预留资源; 508 , GERAN UTRAN向 SGSN发送 PS切换请求响应;
509, SGSN向 MME发送前转重定位请求响应;
510, MME向 eNodeB发送重定位命令;
511 , eNodeB 向用户设备发送用户设备从 eUTRAN 切换到 GERAN UTRAN的命令, 命令用户设备从 GERAN/UTRAN接入; 512, 用户设备从 GERAN/UTRAN接入过程;
513 , GERAN UTRAN向 SGSN发送 PS切换完成操作;
514, UE向 GERAN UTRAN发送 CS寻呼响应消息;
515 , GERAN UTRAN向 MSC/VLR发送 CS寻呼响应消息;
516, UE与 MSC交互进行 CS终呼¾¾程。 如上所述, 在现有技术中, 当 UE在 EPS网络作为被叫用户的终端时,
MSC/VLR只能通过 EPS网络寻呼到 UE,但是, 无法将主叫号码和业务类型 等呼叫信息通知到 UE。只有当 UE完成呼叫电路域回落,接入到 UMTS/GSM 网络,并与 MSC/VLR等进行 CS域信令交互, MSC/VLR才能将呼叫信息(主 叫号码和业务类型等)提供给 UE , 然后, 在 UE振铃时被呼叫的用户才能根 据移动终端上显示的呼叫信息 (主叫号码和业务类型等) 决定是否接听本次 呼叫。 这样将意味着当 UE在 EPS 网络时, 不论用户当前是否有正在进行的 IP业务, 一旦有一个 CS呼叫, UE就必须切换到 UMTS/GSM网络下接入, 用户在 EPS网络正在进行的 IP业务必须切换到 UMTS/GSM PS域、 或者暂 停并且也有可能停止, 这些都会造成正在进行的 IP业务在一定程度上中断。 从上述描述可以看出, 现有呼叫电路域回落技术有以下缺点: 对于是否 进行呼叫电路域回落被叫用户没有选择权; 在进行终呼时, 如果被叫用户在 EPS网络没有正在进行的 IP业务,让 UE回落到 UMTS/GSM CS域进行语音 呼叫, 用户没有感觉, 但是当用户有 IP业务正在进行时, 会因为一些用户当 前不想接听的电话 (例如, 广告、 騷扰电话等) 影响了正在进行的业务(例 如, 用户非常喜欢的游戏、 视频等), 这显然违背了用户的意愿, 降低了用户 体验。 为了给被叫用户提供是否进行呼叫电路域回落的决定权, 当 UE在 EPS 网络时, MSC/VLR就要能够通过 EPS网络把包含主叫号码和业务类型等的 呼叫信息提供给 UE, 如果用户决定接听, 就进行呼叫电路域回落, 否则就 不进行呼叫电路域回落。 这样就必须解决以下问题: MSC/VLR 如何将呼叫 信息传递到 EPS网络, 在 EPS网络中如何将呼叫信息传递给 UE , 以及如何 将用户决定是否进行呼叫电路域回落的选择信息传递给 EPS网络。现有技术 中, 该问题是无法解决的, 这是因为现有的 Gs接口消息是不能传递呼叫信 息, 并且寻呼响应消息中也不携带用户的选择结果。 因此, 目前尚未提出能够使用户选择是否进行电路域回落的技术方案。 发明内容 考虑到相关技术中不能使用户选择是否进行电路域回落, 即, 只能强制 执行电路域回落的问题而做出本发明, 为此, 本发明的主要目的在于提供一 种电路域回落的控制机制, 以解决上述问题。 根据本发明的一个方面, 提供了一种电路域回落的控制方法, 应用于主 叫用户设备对演进的分组域系统网络中的被叫用户设备发起呼叫的场景。 根据本发明的电路域回落的控制方法包括:电路域中获知本次呼叫的呼 叫信息的网元将呼叫信息通知给移动性管理实体; 移动性管理实体将呼叫信 息通知给被叫用户设备; 被叫用户设备根据用户是否应答呼叫或者预先设定 的电路域回落原则来确定是否进行电路域回落。 一方面, 在网元是移动交换中心 /拜访位置寄存器的情况下, 移动交换 中心 /拜访位置寄存器通过在 Gs接口的电路域寻呼消息中携带呼叫信息来将 呼叫信息通知给移动性管理实体。 另一方面, 在网元是用户归属服务器的情况下, 由用户归属服务器通过 在其与移动性管理实体之间的交互信息中携带呼叫信息来将呼叫信息通知给 移动性管理实体。 另外, 在被叫用户设备确定进行电路域回落的情况下, 上述方法进一步 包括: 被叫用户设备将允许进行电路域回落的指示信息发送至能够触发电路 或回落的回落触发网元, 以进行电路或回落, 其中, 回落触发网元包括移动 性管理实体、 eNodeB。 另一方面, 在被叫用户设备确定不进行电路域回落的情况下, 上述方法 进一步包括: 被叫用户设备将不进行电路域回落的指示发送至移动性管理实 体, 移动性管理实体向上述网元返回被叫用户设备不应答呼叫的原因、 或者 不向网元返回任何信息。 如果是根据电路域回落原则决定呼叫是否进行电路 域回落则通过振铃等方式提醒用户呼叫信息。 除此之外,在被叫用户设备才艮据预先设定的呼叫电路域回落原则确定不 进行电路域回落的情况下, 上述方法可以进一步包括: 被叫用户设备提示用 户选择是否进行电路域回落。 并且, 被叫用户设备可以直接提示用户是否进 行电路域回落, 而不 居电路域回落原则进行判断。 此时, 在用户根据提示选择进行电路域回落的情况下, 上述方法进一步 包括: 在电路域回落完成后, 被叫用户设备不提示用户应答呼叫。 此外,上述呼叫信息可以包括: 主叫用户设备的号码、呼叫的业务类型。 根据本发明的另一个方面, 提供了一种电路域回落的控制方法, 应用于 主叫用户设备对演进的分组域系统网络中的被叫用户设备发起呼叫的场景。 根据本发明的电路域回落的控制方法包括:电路域中获知本次呼叫的呼 叫信息的网元将呼叫信息通知给移动性管理实体; 移动性管理实体才艮据预先 设定的电路域回落原则确定是否进行电路域回落; 移动性管理实体将呼叫信 息以及本次呼叫是否进行电路域回落的指示信息发送给被叫用户设备。 一方面, 在网元是移动交换中心 /拜访位置寄存器的情况下, 移动交换 中心 /拜访位置寄存器通过在 Gs接口的电路域寻呼消息中携带呼叫信息来将 呼叫信息通知给移动性管理实体。 另一方面, 在网元是用户归属服务器的情况下, 由用户归属服务器通过 在其与移动性管理实体之间的交互信息中携带呼叫信息来将呼叫信息通知给 移动性管理实体。 此外,上述呼叫信息可以包括: 主叫用户设备的号码、呼叫的业务类型。 根据本发明的再一个方面, 提供了一种电路域回落的控制系统, 应用于 主叫用户设备对演进的分组域系统网络中的被叫用户设备发起呼叫的场景。 根据本发明的电路域回落的控制系统包括: 移动交换中心 /拜访位置寄 存器,用于通过在 Gs接口的电路域寻呼消息中携带本次呼叫的呼叫信息来将 呼叫信息通知给移动性管理实体; 用户归属服务器, 用于通过在其与移动性 管理实体之间的交互信息中携带呼叫信息来将呼叫信息通知给移动性管理实 体; 移动性管理实体, 用于将呼叫信息通知给被叫用户设备, 以及根据预先 设定的电路域回落原则来确定是否进行电路域回落, 并将本次呼叫是否进行 电路域回落的指示信息发送给被叫用户设备; 或者根据来自被叫用户设备的 是否进行电路域回落的指示来判断是否进行电路域回落; 被叫用户设备, 用 于在移动性管理实体不进行电路域回落的情况下, 根据电路域回落原则或被 叫用户终端的用户是否应答来确定是否进行电路域回落。 其中, 呼叫回落原则可以设置于所述移动性管理实体和 /或所述被叫用 户设备。 根据本发明的再一个方面, 还提供了一种电路域回落的控制装置, 应用 于主叫用户设备对演进的分组域系统网络中的被叫用户设备发起呼叫的场 景。 根据本发明的电路域回落的控制装置包括: 转发模块, 用于将本次呼叫 的呼叫信息通知给移动性管理实体, 以及将呼叫信息从移动性管理实体转发 至被叫用户设备; 电路域回落决策模块, 其上设定有电路域回落原则, 用于 根据电路域回落原则或被叫用户设备的用户是否应答呼叫来判断是否进行电 路域回落; 电路域回落执行模块, 用于根据电路域回落决策模块的决策来执 行电路域回落。 其中, 转发模块位于获知呼叫信息的网元和 /或移动性管理实体。 并且 上述网元包括: 移动交换中心 /拜访位置寄存器和 /或用户归属服务器。 此外, 电路域回落决策模块位于被叫用户设备和 /或移动性管理实体。 通过本发明的上述技术方案, 能够实现由用户在 EPS 网络作为被叫时 对所进行的呼叫电路域回落进行控制, 解决了相关技术中只能强制执行电路 域回落的问题, 从而保证了 EPS网络业务的可用性, 提高了用户的满意度, 并且能够减少对 UMTS/GSM网络资源的无效占用。 附图说明 此处所说明的附图用来提供对本发明的进一步理解,构成本申请的一部 分, 本发明的示意性实施例及其说明用于解释本发明, 并不构成对本发明的 不当限定。 在附图中: 图 1是根据相关技术的 EPS网络系统的框图; 图 2是才艮据相关技术的 EPS网络与 UMTS/GSM网络的具体覆盖情况的 示意图; 图 3是根据相关技术的 UE在 EPS网络作为被呼叫的用户时的整个信令 消息流程图; 图 4是现有技术中一种终呼时的呼叫电路域回落实现方法的信令流程, 其中, 当 UE在 EPS网络处于活动态时, CS寻呼消息从 MSC/VLR一直发到 UE; 图 5 为现有技术中另一种终呼时的呼叫电路域回落实现方法的信令流 程, 其中, 当 UE在 EPS网络处于活动态时, CS寻呼消息从 MSC/VLR—直 发到 eNodeB , eNodeB接收到 CS寻呼消息就触发呼叫电路域回落过程; 图 6是根据本发明方法实施例一的电路域回落的控制方法的流程图; 图 7是才艮据本发明方法实施例一的方法中由 MSC/VLR来通知呼叫信息 的情况下的信令传递过程的信令流程图; 图 8是才艮据本发明方法实施例一的方法中由 MSC/VLR来通知呼叫信息 的情况下 UE决定进行呼叫电路域回落的流程图; 图 9是才艮据本发明方法实施例一的方法中由 MSC/VLR来通知呼叫信息 的情况下 UE决定不进行呼叫电路域回落的信令流程图; 图 10是才艮据本发明方法实施例一的方法中由 HSS来通知呼叫信息的情 况下在 UE处于分离态或空闲态时, MME直接给 HSS返回响应消息的信令 流程图; 图 11是才艮据本发明方法实施例一的方法中由 HSS来通知呼叫信息的情 况下 UE处于活动态或空闲态时, MME给 UE转发包含呼叫信息的相应消息, UE进行呼叫电路域回落的信令流程图; 图 12是才艮据本发明方法实施例一的方法中由 HSS来通知呼叫信息的情 况下在 UE处于活动态或空闲态时, UE决定不进行呼叫电路域回落的信令流 程图; 图 13是根据本发明方法实施例二的电路域回落的控制方法的流程图; 图 14是才艮据本发明方法实施例二的方法中由 MME决定是否进行电路 域回落的信令流程图; 图 15是才艮据本发明方法实施例二的方法中由 MME决定进行呼叫电路 域回落的详细信令处理流程图; 图 16是才艮据本发明方法实施例二的方法中由 MME决定不进行呼叫电 路或回落的详细信令处理流程图; 以及 图 17是根据本发明装置实施例的电路域回落的控制装置的框图。 具体实施方式 功能相克述 考虑到在相关技术中, 如果需要实现对电路域回落的控制, 则需要由已 经知道主叫号码和业务类型等呼叫信息的电路域网元将该信息传递给 EPS网 络,之后才能在 EPS网络内将呼叫信息传递给用户决定或者根据用户预先设 置的规则决定呼叫是否进行电路域回落。 因此, 本发明实施例提供了一种改进的电路域回落的控制机制, 通过修 改 MSC/VLR和 MME之间现有 Gs接口的 CS寻呼消息、 或者是修_改 HSS 与 MME之间的接口信息、 或者是在 HSS与 MME之间增加信息, 从而将主 叫号码和业务类型等呼叫信息传递给 MME, 再由 MME将呼叫信息传递给 UE。 此时, 通过 MME和 UE之间进行信令交互过程来决定是否进行呼叫电 路域回落。 可以用以下两种方式决定是否进行呼叫电路或回落:
( 1 ) 在 UE上决定。 将呼叫信息提示给用户, 根据用户是否接听的操 作来确定是否进行呼叫电路域回落; 根据在 UE中保存的用户预先设置的呼 叫电路域回落原则来确定是否进行呼叫电路域回落, 呼叫是否进行电路域回 落是由 UE决定;
( 2 ) 在网络中决定, 通过用户预先设置等方式在 MME上保存呼叫电 路或回落原则, 即, 当 MME 从 MSC/VLR或者 HSS接收到本次呼叫的呼叫 信息时, 由 MME根据预置的原则决定是否需要进行呼叫电路域回落, 并且 由 MME通过信令消息通知 UE本次呼叫的主叫号码和业务类型以及呼叫是 否进行电路域回落等信息。 需要说明的是, 在不沖突的情况下, 本发明中的实施例及实施例中的特 征可以相互组合。 下面将参照附图详细描述本发明。 虽然在附图或其描述中 示出了逻辑顺序, 但是在某些情况下, 可以以不同于此处的顺序执行所示出 或描述的流程。 方法实施例一 根据本发明的实施例, 提供了一种电路域回落的控制方法, 应用于主叫 UE对演进的分组或系统网络中的被叫 UE发起呼叫的场景。 图 6是根据本发明方法实施例一的电路域回落的控制方法的流程,如图
6所示, 居本实施例的电路域回落的控制方法包括如下的 602至 606:
602, 电路或中获知主叫 UE向被叫 UE发起的呼叫的呼叫信息的网元 将呼叫信息通知给移动性管理实体;
604, 移动性管理实体将呼叫信息通知给被叫 UE; 606, 被叫 UE根据用户是否应答呼叫或者预先设定的电路域回落原则 来确定是否进行电路域回落。 一方面, 在网元是移动交换中心 /拜访位置寄存器 (MSC/VLR ) 的情况 下, MSC/VLR通过在 Gs接口的电路域寻呼消息中携带呼叫信息来将呼叫信 息通知给移动性管理实体。 另一方面, 在网元是用户归属服务器 (HSS ) 的情况下, 由 HSS 通过 在其与移动性管理实体之间的交互信息中携带呼叫信息来将呼叫信息通知给 移动性管理实体。 另夕卜, 在被叫 UE根据电路域回落原则确定进行电路域回落的情况下, 该方法进一步包括: 被叫用户设备将允许进行电路域回落的指示信息发送至 能够触发电路域回落的回落触发网元, 以进行电路域回落, 其中, 回落触发 网元包括 MME、 eNodeB。 另一方面, 在被叫 UE确定不进行电路或回落的情况下, 该方法进一步 包括: 被叫用户设备将不进行电路域回落的指示发送至移动性管理实体; 移 动性管理实体向上述网元返回被叫用户设备不应答呼叫的原因、 或者不向网 元返回任何信息。 除此之外, 在被叫 UE根据预先设定的呼叫电路域回落原则确定不进行 电路域回落的情况下, 该方法进一步可以包括: 被叫 UE提示用户选择是否 进行电路域回落。 并且, 也可以直接提示用户是否进行电路域回落, 而不才艮 据电路域回落原则进行判断。 此外, 在用户根据提示选择进行电路域回落的情况下, 该方法可以进一 步包括: 在电路域回落完成后, 被叫 UE不提示用户应答呼叫, 即, 避免在 一次呼叫过程中两次提示用户。 另夕卜, 上述呼叫信息可以包括: 主叫 UE的号码、 呼叫的业务类型。 图 7、 图 8和图 9为由 MSC/VLR来通知呼叫信息, 并且在 UE决定是 否进行呼叫电路域回落的信令流程。 可以用两种方法在 UE决定是否进行呼 叫电路域回落: 第一种, UE 提醒被叫用户本次呼叫信息, 根据用户是否接 听的操作来判断; 第二种, 根据用户在 UE中预先设置的呼叫电路域回落原 则由 UE来决定是否进行电路域回落。 图 7示出了呼叫信息(主叫号码和业务类型)从 MSC/VLR传递给 MME、 在 MME与 UE之间传递呼叫信息和确定是否进行呼叫电路或回落的信息的 信令流程, 如图 7所示, 具体可以包括如下的 701至 705: 701 , UE在 EPS网络接入, MME和 MSC/VLR之间已经建立了 Gs关 联关系。 UE的用户有一个呼叫, 并且该用户是被呼叫的用户。 MSC/VLR接 收到该呼叫的初始地址消息(即, 入呼请求), 该消息中携带了呼叫信息(主 叫号码和业务类型等)。该入呼请求的主叫方可以是固定用户、移动用户等任 意类型的用户。
702, MSC/VLR接收到入呼请求, 开始寻呼 UE。 才艮据 VLR中保存的 Gs关联关系信息, MSC/VLR给 MME发送一个 CS寻呼请求消息, 该 CS寻 呼请求消息中需要新增参数来表示本次呼叫信息: 主叫号码和业务类型;
703 , MME接收到 CS寻呼消息,通过相关信令消息将本次呼叫信息(主 叫号码和业务类型) 传递给 UE; 传递方式可以是新增一条专用的信令消息 或者在现有的信令消息 (例如, 寻呼消息 paging等) 中新增参数;
704, UE从 MME接收到本次呼叫相关信息。有两种具体实施方法可以 用来决定呼叫是否进行电路域回落: 第一种方法是根据用户是否接听的操作来决定。 UE接收到 MME的消 息就提示用户, 等待用户进行接听, 如果用户接听呼叫, UE接收到用户的 操作信息就生成进行呼叫电路域回落的指示信息; 否则, 就认为用户不想接 听本次呼叫 (可以包括拒绝和用户无应答等), UE就生成不进行呼叫电路域 回落的指示信息。 第二种方法是 UE根据用户在自己中预先设置好的呼叫电路域回落原则 来决定。 UE接收到 MME的消息, 就才艮据自己保存的呼叫电路域回落原则和 本次呼叫信息来决定是否进行呼叫电路域回落。 如果本次呼叫满足用户预先 设置的回落原则, UE就生成进行呼叫电路域回落的指示信息; 否则, UE就 生成不进行呼叫电路域回落的指示信息并提示用户本次呼叫信息。 在这种方 法中, 在本次呼叫不满足用户预先设置的回落原则时, 也可以按照下面方式 来实现: UE 提示用户本次呼叫信息, 然后根据用户的操作来决定, 即, 第 一种实现方法。
705 , UE根据 704 决策的结果, 将呼叫是否进行电路域回落的信息传 递给 MME。 传递方式可以是通过新增一条专用的信令消息或者在已有的消 息中新增参数来传递呼叫是否进行电路域回落指示信息。 图 8为由 MSC/VLR来通知呼叫信息的情况下,用户决定呼叫进行电路 域回落的信令流程, 通过该图和下面流程描述显示利用本发明如何完成用户 决定呼叫电路域回落以及回落和终呼流程, 主要包含如下的 801至 809:
801至 805和上面所述的 701至 705相同, 在此不再赘述;
806, UE或者 MME或者 eNodeB触发呼叫电路或回落流程, 按照呼叫 电路或回落方法(例如, 图 4和图 5所示的呼叫电路或回落方法)进行回落, 回落后 UE就从 GERAN UTRAN网络接入。 如果是由 eNodeB或者 MME来 触发呼叫电路或回落流程, 那么, 在 805 中 UE需要给 eNodeB和 MME发 送消息告诉需要进行呼叫电路域回落等信息, 否则, UE可以不给 eNodeB和 MME发送消息; 807, UE给 GERAN UTRAN发送消息, 并在该消息中包含 CS寻呼响 应消息;
808 , GERAN UTRAN给 MSC/VLR发送消息, 并在该消息中包含 CS 寻呼响应消息;
809, MSC/VLR接收到 CS寻呼响应消息, 开始进行 CS终呼流程。 和 现有技术中 CS终呼流程有一点不同: UE如果判断在 804中已经提示过用户, 就不再提示用户, 以免在一次呼叫过程中用户被提醒两次。 图 9为由 MSC/VLR来通知呼叫信息的情况下,用户决定呼叫不进行电 路域回落的信令流程, 通过该图和下面流程描述显示利用本发明如何完成用 户决定呼叫不进行电路域回落以及后续呼叫释放流程, 主要包含如下的 901 至 907:
901至 905和上面所述的 701至 705相同, 在此不再赘述;
906 , MME给 MSC/VLR发送消息, 可以是 Gs口已有消息 "用户不可 及" 携带一个新增原因表示用户不想接听本次呼叫或者发送一个新消息表示 拒绝电路或回落呼叫释放等; 或者 MME不给 MSC/VLR发送消息由网元超 时释放呼叫;
907, MSC/VLR接收到消息, 开始呼叫释放流程。 图 10、 图 11、 和图 12为由 HSS来通知呼叫信息, 并且在 UE决定是 否进行呼叫电路域回落的信令流程。 图 10示出了 UE处于分离态或空闲态时, MME直接给 HSS返回响应 消息的信令流程, 如图 10所示, 具体包括如下的 1001至 1008:
1001和 1002 , GMSC接收到初始地址消息 (即, 入呼请求), 向 HSS 请求路由信息, 请求消息中目前已经携带了主叫号码和业务类型信息。 该入呼请求的主叫方可以是固定用户、 移动用户等任意类型的用户。
1003 , HSS检查该用户有 UMTS/GSM CS和 EPS网络的注册或者签约 信息, 向 MME发送询问消息, 其中, 该询问消息中携带有主叫号码和业务 类型等呼叫信息。
1004 , MME判断 UE处于分离态, 或者处于空闲态并且空闲态的策略 是允许进行呼叫电路域回落, MME直接给 HSS发响应消息, 并在该响应消 息中携带允许呼叫的信息。
1005至 1007 , HSS接收到响应消息后, 向用户所在 VLR获取到漫游 号码并发送给 GMSC„
1008至 1011 , GMSC分析漫游号码并将呼叫接续到 MSC/VLR, 后续 按照图 3所示的现有技术完成呼叫的建立。 图 11示出了 UE处于活动或空闲态时, MME给 UE转发呼叫相应消息, 用户接听来电或者根据预先设置的原则决定进行呼叫电路域回落的信令流 程。 如图 11所示, 具体包括如下的 1101至 1113 :
1101 和 1102 , GMSC接收到初始地址消息 (即, 入呼请求), 向 HSS 请求路由信息, 请求消息中目前已经携带了主叫号码和业务类型信息; 需要说明的是, 该入呼请求的主叫方可以是固定用户、 移动用户等任意 类型的用户;
1103 , HSS检查该用户有 UMTS/GSM CS和 EPS网络的注册或者签约 信息, 向 MME发送询问消息, 该询问消息中携带有主叫号码和业务类型等 呼叫信息;
1104, MME判断 UE处于活动态(可能有 IP业务正在进行 ), 或者 UE 处于空闲态并且空闲态的策略是询问用户或者才艮据用户设置的回落原则决定 是否进行呼叫电路域回落, MME给 UE转发询问消息;
1105 , UE给用户显示该询问消息并等待用户响应, 用户允许呼叫建立 或者 UE根据用户预先在其中设置和保存的规则决定呼叫进行电路域回落, 之后 UE给 MME发送响应消息, 并在响应消息中携带允许呼叫的信息; 1106, MME给 HSS转发响应消息;
1107至 1109, HSS接收到响应消息后, 向用户所在 VLR获取到漫游号 码并发送给 GMSC;
1110至 1113 , GMSC分析漫游号码并^1呼叫接续到 MSC/VLR, 后续 按照图 3 所示的现有技术完成呼叫的建立。 和现有技术中的区别在于: UE 判断如果在 1105中已经提示过用户, 就不再提示用户, 以免在一次呼叫过程 中用户被提醒两次。 图 12描述了 UE处于活动或空闲态时, MME给 UE转发相应消息, 用 户拒接来电或者 UE 根据用户预先设置的规则决定不进行电路域回落的流 程, 包括 ¾。下的 1201至 1208: 1201和 1202 , GMSC接收到初始地址消息 (即, 入呼请求), 向 HSS 请求路由信息,请求消息中目前已经携带了主叫号码和业务类型信息; 其中, 该入呼请求的主叫方可以是固定用户、 移动用户等任意类型的用户;
1203 , HSS检查该用户有 UMTS/GSM CS和 EPS网络的注册或者签约 信息, 向 MME发送询问消息, 该询问消息中携带有主叫号码和业务类型等 呼叫信息;
1204 , MME判断 UE处于活动态(可能有 IP业务正在进行), 或者 UE 处于空闲态并且空闲态的策略是询问用户或者才艮据用户设置的回落原则决定 是否进行呼叫电路域回落, MME给 UE转发询问消息;
1205 , UE给用户显示该询问消息并等待用户响应, 用户拒接该呼叫, 或者才艮据用户预先设置的回落原则, UE决定不需要进行回落。 UE给 MME 发送响应消息, 该响应消息中携带有拒接呼叫的信息;
1206 , MME给 HSS转发响应消息; 1207 , HSS接收到响应消息后, 给 GMSC发送路由信息失败响应;
1208 , GMSC启动呼叫释放流程, 释放本次呼叫。 方法实施例二 根据本发明的实施例, 提供了一种电路域回落的控制方法, 应用于主叫 UE对演进的分组或系统网络中的被叫 UE发起呼叫的场景。 图 13是根据本发明方法实施例二的电路域回落的控制方法的流程, 如 图 13所示, 居本实施例的电路域回落的控制方法包括如下的 1302至 1306:
1302 , 电路或中获知主叫 UE向被叫 UE发起的呼叫的呼叫信息的网元 将呼叫信息通知给移动性管理实体; 1304 ,移动性管理实体根据预先设定的电路域回落原则确定是否进行电 路域回落;
1306 ,移动性管理实体将呼叫信息以及本次呼叫是否进行电路域回落的 指示信息发送给被叫 UE。 一方面, 在网元是 MSC/VLR的情况下, MSC/VLR通过在 Gs接口的 电路域寻呼消息中携带呼叫信息来将呼叫信息通知给移动性管理实体。 另一方面, 在网元是 HSS的情况下, 由 HSS通过在其与移动性管理实 体之间的交互信息中携带呼叫信息来将呼叫信息通知给移动性管理实体。 此外, 上述呼叫信息可以包括: 主叫 UE的号码、 呼叫的业务类型。 图 14、 图 15和图 16为由 MSC/VLR来通知呼叫信息, 在 MME决定呼 叫是否进行电路域回落, 根据在 MME上保存的用户预先设置的呼叫电路域 回落原则来决定呼叫是否进行电路域回落。 图 14为在由 MSC/VLR来通知呼叫信息的情况的简要处理流程。 通过 该图和下面流程描述显示利用本发明如何完成用户决定呼叫电路域回落以及 后续呼叫释放 ¾ϊ程。 如图 14所示, 主要包含如下的 1401至 1405: 1401 , UE在 EPS 网^^妻入, MME和 MSC/VLR之间已经建立了 Gs 关联关系, UE的用户有一个呼叫, 并且该用户是被呼叫的用户。 MSC/VLR 接收到该呼叫的初始地址消息(即, 入呼请求), 该初始地址消息中携带有呼 叫信息(主叫号码和业务类型等), 该入呼请求的主叫方可以是固定用户、 移 动用户等任意类型的用户;
1402 , MSC/VLR接收到入呼请求, 开始寻呼 UE。 才艮据 VLR中保存的 Gs关联关系信息, MSC/VLR给 MME发送一个 CS寻呼消息, 该寻呼消息 中需要新增参数来表示本次呼叫信息: 主叫号码和业务类型;
1403 , MME接收到 CS寻呼消息, 根据自己保存的用户预先设置的呼 叫电路域回落原则和本次呼叫信息决定本次呼叫是否需要进行电路域回落。 如果本次呼叫满足回落原则, 就需要进行呼叫电路域回落; 否则, 就不需要 进行呼叫电路域回落;
1404 , MME将本次呼叫信息以及本次呼叫是否进行电路或回落的信息 传递给 UE。 传递方式可以是通过新增一条专用的信令消息或者在现有的信 令消息中新增参数来表示 (主叫号码和业务类型, 呼叫是否进行电路域回落 等); 1405 , UE接收到消息, 判断如果呼叫不进行电路域回落, UE 就提示 用户本次呼叫信息, 否则就不提醒用户。 图 15示出了由 MSC/VLR来通知呼叫信息在 MME决定呼叫进行电路 或回落的情况,呼叫信息(主叫号码和业务类型)从 MSC/VLR传递给 MME、 以及之后在 MME与 UE之间传递呼叫信息的信令流程。 如图 15所示, 具体 包括如下的 1501至 1508:
1501至 1504和上面描述的 1401至 1404相同, 在此不再赘述;
1505 , UE或者 MME或者 eNodeB触发呼叫电路或回落流程, 按照呼 叫电路或回落方法 (例如, 图 4和图 5所示的呼叫电路或回落方法) 进行回 落, 回落后 UE就从 GERAN/UTRAN网络接入。 1506, UE给 GERAN/UTRAN发送消息, 该消息中包含 CS寻呼响应消 息;
1507 , GERAN/UTRAN给 MSC/VLR发送消息, 该消息中包含 CS寻 呼响应消息; 1508 , MSC/VLR接^:到 CS寻呼响应消息, 开始进行 CS终呼¾¾程。 图 16为由 MSC/VLR来通知呼叫信息在 MME决定呼叫不进行电路 ^戈 回落的情况的信令流程。 通过该图和下面流程描述来说明完成用户决定呼叫 不进行电路域回落以及后续呼叫释放流程。 如图 16 所示, 具体包含如下的 1601至 1605 :
1601至 1603和上面所述的 1401至 1403 目同, 在 jt匕不再赞述;
1604-1、 1605-1 和 1604-2、 1605-2可以并行执行或者按照先后顺序执 行;
1604- 1 : MME给 MSC/VLR发送消息, 可以是 Gs口已有消息 "用户不 可及" 携带一个新增原因表示用户不想接听本次呼叫或者发送一个新消息表 示拒绝电路域回落呼叫释放等; 或者, MME 不给 MSC/VLR 发送消息由 MSC/VLR超时释放呼叫;
1605- 1 : MSC/VLR接收到消息, 开始呼叫释放流程;
1604- 2: MME将本次呼叫信息以及本次呼叫是否进行电路或回落的信 息传递给 UE。 传递方式可以是通过新增一条专用的信令消息或者在现有的 信令消息中新增参数来表示 (其中呼叫信息包括: 主叫号码和业务类型, 呼 叫是否进行电路域回落等);
1605- 2: UE接收到消息, 提示用户本次呼叫。 尽管图 14、 15、 和 16中示出了 MSC/VLR转发呼叫信息的情况, 但是 如上所述, 还可以由 HSS来转发呼叫信息, 其中, 转发呼叫信息的过程与之 前图 11和 12描述的 HSS转发呼叫信息的情况下的处理过程类似,后续过程 也可以采用图 11、 12、 14、 15、 和 16中的所示的后续过程, 这里不再重复。 系统实施例 根据本发明的实施例, 提供了一种电路域回落的控制系统, 应用于主叫 用户设备对演进的分组域系统网络中的被叫用户设备发起呼叫的场景。 该电路域回落的控制系统可以通过图 1所示的架构来实现,如图 1所示, 才艮据本发明实施例的电路域回落的控制系统包括: MSC/VLR 108、 HSS 106、 MME 105、 被叫用户设备 101 , 下面对这些网元进行描述。
MSC/VLR 108, 用于通过在 Gs接口的电路域寻呼消息中携带主叫用户 设备向被叫用户设备 101发起的呼叫的呼叫信息来将呼叫信息通知给 MME 105; HSS 106, 用于通过在其与 MME 105之间的交互信息中携带呼叫信息 来将呼叫信息通知给 MME 105; MME 105, 用于将呼叫信息通知给被叫用 户设备 101 , 以及根据预先设定的电路域回落原则来确定是否进行电路域回 落, 并将本次呼叫是否进行电路域回落的指示信息发送给被叫用户设备 101; 或者根据来自被叫用户设备 101的是否进行电路域回落的指示来判断是否进 行电路域回落; 被叫用户设备 101 , 用于在 MME 105不判断是否进行电路域 回落的情况下, 被叫用户设备 101 居电路域回落原则或被叫用户终端 101 的用户是否应答来确定是否进行电路域回落。 其中, 呼叫信息可以包括: 主叫用户设备的号码、 呼叫的业务类型。 呼 叫回落原则设置于所述移动性管理实体和 /或所述被叫用户设备, 也就是说, 呼叫回落原则可设置在 MME和 UE上,也可以设置于 MME或 UE上。并且, MME 105根据其上设置的呼叫回落原则来判断是否进行回落; UE 101根据 其上设置的呼叫回落原则或用户是否应答呼叫来判断是否进行回落。 装置实施例 根据本发明的实施例, 提供了一种电路域回落的控制装置, 应用于主叫 用户设备对演进的分组域系统网络中的被叫用户设备发起呼叫的场景。 图 17是才艮据本发明装置实施例的电路域回落的控制装置的框图, 如图
17 所示, 根据本实施例电路域回落的控制装置包括: 转发模块 1702、 电路 域回落决策模块 1704、 电路域回落执行模块 1706, 下面对这些模块进行描 述。 转发模块 1702, 用于将主叫用户设备向被叫用户设备发起的呼叫的呼 叫信息通知给 MME, 以及将呼叫信息从 MME转发至被叫用户设备; 电路 域回落决策模块 1704 , 其上设定有电路域回落原则, 用于根据电路域回落原 则或被叫用户设备的用户是否应答呼叫来判断是否进行电路域回落; 电路域 回落执行模块 1706, 用于根据电路域回落决策模块 1704的决策来执行电路 域回落。 其中, 转发模块 1702位于获知呼叫信息的网元和 /或 MME。 并且上述 网元包括: MSC/VLR和 /或 HSS。 此外, 电路或回落决策模块 1704可位于被叫用户设备和 /或 MME。 综上所述, 借助于本发明的技术方案, 能够实现由用户在 EPS 网络作 为被叫时对所进行的呼叫电路域回落进行控制,从而保证了 EPS网络业务的 可用性, 提高了用户的满意度, 并且能够减少对 UMTS/GSM 网络资源的无 效占用。 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。

Claims

权 利 要 求 书
1. 一种电路域回落的控制方法, 应用于主叫用户设备对演进的分组域系统 网络中的被叫用户设备发起呼叫的场景, 其特征在于, 所述方法包括: 电路域中获知本次呼叫的呼叫信息的网元将所述呼叫信息通知给 移动性管理实体;
所述移动性管理实体将所述呼叫信息通知给所述被叫用户设备; 所述被叫用户设备才艮据用户是否应答所述呼叫或者预先设定的电 路域回落原则来确定是否进行电路域回落。
2. 根据权利要求 1所述的控制方法, 其特征在于, 在所述网元是移动交换 中心 /拜访位置寄存器的情况下,所述移动交换中心 /拜访位置寄存器通过 在 Gs 接口的电路域寻呼消息中携带所述呼叫信息来将所述呼叫信息通 知给所述移动性管理实体。
3. 根据权利要求 1所述的控制方法, 其特征在于, 在所述网元是用户归属 月 务器的情况下, 由所述用户归属月 务器通过在其与所述移动性管理实 体之间的交互信息中携带所述呼叫信息来将所述呼叫信息通知给所述移 动性管理实体。
4. 根据权利要求 1所述的控制方法, 其特征在于, 在所述被叫用户设备确 定进行所述电路域回落的情况下, 所述方法进一步包括:
所述被叫用户设备将允许进行所述电路域回落的指示信息发送至 能够触发所述电路域回落的回落触发网元, 以进行所述电路域回落, 其 中, 所述回落触发网元包括所述移动性管理实体、 演进的节点 B。
5. 根据权利要求 1所述的控制方法, 其特征在于, 在所述被叫用户设备确 定不进行所述电路域回落的情况下, 所述方法进一步包括:
所述被叫用户设备将不进行所述电路域回落的指示发送至所述移 动性管理实体;
所述移动性管理实体向所述网元返回所述被叫用户设备不应答所 述呼叫的原因、 或者不向所述网元返回任何信息。
6. 根据权利要求 1所述的控制方法, 其特征在于, 在所述被叫用户设备根 据所述预先设定的呼叫电路域回落原则确定不进行所述电路域回落的情 况下, 所述方法进一步包括:
所述被叫用户设备提示所述用户选择是否进行所述电路域回落。
7. 根据权利要求 1所述的控制方法, 其特征在于, 所述被叫用户设备直接 提示所述用户是否进行所述电路域回落。
8. 根据权利要求 6或 7所述的控制方法, 其特征在于, 在所述用户选择进 行所述电路域回落的情况下, 所述方法进一步包括:
在所述电路域回落完成后,所述被叫用户设备不提示所述用户应答 所述呼叫。
9. 根据权利要求 1至 7中任一项所述的控制方法, 其特征在于, 所述呼叫 信息包括: 所述主叫用户设备的号码、 所述呼叫的业务类型。
10. 一种电路域回落的控制方法, 应用于主叫用户设备对演进的分组域系统 网络中的被叫用户设备发起呼叫的场景, 其特征在于, 所述方法包括: 电路域中获知本次呼叫的呼叫信息的网元将所述呼叫信息通知给 移动性管理实体;
所述移动性管理实体才艮据预先设定的电路域回落原则确定是否进 行电路域回落;
所述移动性管理实体将所述呼叫信息以及本次呼叫是否进行电路 域回落的指示信息发送给所述被叫用户设备。
11. 根据权利要求 10所述的控制方法, 其特征在于, 在所述网元是移动交换 中心 /拜访位置寄存器的情况下,所述移动交换中心 /拜访位置寄存器通过 在 Gs 接口的电路域寻呼消息中携带所述呼叫信息来将所述呼叫信息通 知给所述移动性管理实体。
12. 根据权利要求 10所述的控制方法, 其特征在于, 在所述网元是用户归属 月 务器的情况下, 由所述用户归属月 务器通过在其与所述移动性管理实 体之间的交互信息中携带所述呼叫信息来将所述呼叫信息通知给所述移 动性管理实体。
13. 根据权利要求 10至 12中任一项所述的控制方法, 其特征在于, 所述呼 叫信息包括: 所述主叫用户设备的号码、 所述呼叫的业务类型。
14. 一种电路或回落的控制系统, 应用于主叫用户设备对演进的分组或系统 网络中的被叫用户设备发起呼叫的场景, 其特征在于, 所述系统包括: 移动交换中心 /拜访位置寄存器, 用于通过在 Gs接口的电路域寻呼 消息中携带本次呼叫的呼叫信息来将所述呼叫信息通知给移动性管理实 体;
用户归属月 务器,用于通过在其与所述移动性管理实体之间的交互 信息中携带所述呼叫信息来将所述呼叫信息通知给所述移动性管理实 体;
所述移动性管理实体,用于将所述呼叫信息通知给所述被叫用户设 备, 以及根据预先设定的电路域回落原则来确定是否进行电路域回落, 并将本次呼叫是否进行所述电路域回落的指示信息发送给所述被叫用户 设备; 或者根据来自所述被叫用户设备的是否进行所述电路域回落的指 示来判断是否进行所述电路域回落;
所述被叫用户设备,用于在所述移动性管理实体不判断是否进行所 述电路域回落的情况下, 所述被叫用户设备根据电路域回落原则或所述 被叫用户终端的用户是否应答来确定是否进行所述电路域回落。
15. 根据权利要求 14所述的控制系统, 其特征在于,所述呼叫回落原则设置 于所述移动性管理实体、 和 /或所述被叫用户设备。
16. 一种电路域回落的控制装置, 应用于主叫用户设备对演进的分组域系统 网络中的被叫用户设备发起呼叫的场景, 其特征在于, 所述装置包括: 转发模块, 用于将本次呼叫的呼叫信息通知给移动性管理实体, 以 及将所述呼叫信息从所述移动性管理实体转发至所述被叫用户设备; 电路域回落决策模块, 其上设定有电路域回落原则, 用于根据所述 电路域回落原则或所述被叫用户设备的用户是否应答所述呼叫来判断是 否进行电路域回落;
电路域回落执行模块,用于才艮据所述电路域回落决策模块的决策来 执行所述电路域回落。
17. 根据权利要求 16所述的控制装置, 其特征在于, 所述转发模块位于获知 所述呼叫信息的网元和 /或所述移动性管理实体。
18. 根据权利要求 17所述的控制装置, 其特征在于, 所述网元包括: 移动交 换中心 /拜访位置寄存器和 /或用户归属服务器。
19. 根据权利要求 16所述的控制装置, 其特征在于, 电路域回落决策模块位 于所述被叫用户设备和 /或所述移动性管理实体。
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