WO2015096451A1 - 一种业务域和接入域综合决策的设备及呼叫路由的方法 - Google Patents

一种业务域和接入域综合决策的设备及呼叫路由的方法 Download PDF

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Publication number
WO2015096451A1
WO2015096451A1 PCT/CN2014/081658 CN2014081658W WO2015096451A1 WO 2015096451 A1 WO2015096451 A1 WO 2015096451A1 CN 2014081658 W CN2014081658 W CN 2014081658W WO 2015096451 A1 WO2015096451 A1 WO 2015096451A1
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WIPO (PCT)
Prior art keywords
network
domain
terminal
access
mobile
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PCT/CN2014/081658
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English (en)
French (fr)
Inventor
查敦林
杨维
屠嘉顺
赵文贤
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中兴通讯股份有限公司
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Application filed by 中兴通讯股份有限公司 filed Critical 中兴通讯股份有限公司
Priority to MYPI2016001194A priority Critical patent/MY190963A/en
Priority to EP14875041.7A priority patent/EP3089489A4/en
Publication of WO2015096451A1 publication Critical patent/WO2015096451A1/zh

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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W76/00Connection management
    • H04W76/10Connection setup
    • H04W76/15Setup of multiple wireless link connections
    • H04W76/16Involving different core network technologies, e.g. a packet-switched [PS] bearer in combination with a circuit-switched [CS] bearer

Definitions

  • the present invention relates to the field of communications, and in particular, to a device for comprehensive decision making in a service domain and an access domain, and a method for routing a route of a Long Term Evolution (LTE) voice VoLTE (Voice over LTE).
  • LTE Long Term Evolution
  • VoLTE Voice over LTE
  • the IP Multimedia Subsystem is the future of multimedia communications and the most important component of next-generation networks. It is a subsystem of the Third Generation Partnership Project (3GPP) that supports IP multimedia services.
  • 3GPP Third Generation Partnership Project
  • IMS-based VoLTE is recognized as the main development direction of 3GPP's LTE network voice solution.
  • Single Radio Voice Call Continuity (SRVCC) technology is required to utilize the existing Circuit-Switched (CS) network. Wide coverage, switching voice services from LTE networks to mobile CS networks, maintaining the continuity of voice services.
  • VoLTE terminals including VoLTE terminals with SRVCC switching, may have the ability to register Circuit Switched Fallback (CSFB) at the same time. Therefore, even if the user resides in the LTE network for a long time, the dual registration in the home location register (HLR) of the mobile CS network and the LTE/IMS network are simultaneous. At the same time, the user switches from the LTE network to the mobile CS network, and does not log out of the state in LTE/IMS, and also causes the existence of false double registration of the user. Therefore, a further technical method must be used to determine the network in which the user is actually registered.
  • HLR home location register
  • the Terminated Access Domain Selection (T-ADS) function is defined in the 3GPP standard. That is, the terminal is registered in the CS network and also registered in the IMS network.
  • the T-ADS function compares the GPRS service support node (Serving GPRS Support). Node, SGSN) and the last active time of the user in the Mobility Management Entity (MME) to decide whether the user may actually register the network. If the last active time time saved by the MME is the latest, the LTE/IMS network is selected for the VoLTE terminal with the SRVCC function. If the last active time time saved by the SGSN is the latest, the CS network is selected for the VoLTE terminal with the SRVCC function.
  • MME Mobility Management Entity
  • 3GPP has partially standardized IMS-based VoLTE calls or VoLTE calls with SRVCC technology, mainly to standardize the voice call flow and to maintain the call continuity switching process. Due to the characteristics of the multimode single standby terminal, the terminal can only select one network for registration (registered on the LTE/IMS network or mobile CS network) in the non-handover state.
  • VoLTE According to the VoLTE process provided by VoLTE's IR.64 standard, all VoLTE users from mobile CS networks or VoLTE users with SRVCC function are required to request the mobile CS network to transfer the session to the IMS network through CAMEL triggering.
  • the network provides services regardless of whether the current SRVCC user is actually registered in the mobile CS network or the LTE/IMS network.
  • the user is registered in the mobile CS network, and returns to the IMS network during the roaming scenario.
  • the calling service has a roaming CAMEL triggering interworking problem. In actual applications, the operator is forced to abandon the calling service to trigger on the IMS network, resulting in the called service being concentrated. The IMS network is executed, and the calling service is still left behind in the mobile CS network.
  • the mobile phone When the SRVCC user registers in the mobile CS network, the mobile phone will terminate the call from the mobile CS network, and the service will execute the call list on the IMS network. When the mobile CS network is deployed, the call list is also displayed, which brings the bill association or eliminates the duplicate problem. , increased the complexity of bill processing.
  • This method requires all services to be executed in the IMS network. At the initial stage of commercial deployment of SRVCC, at least all traditional services are required to be migrated to the IMS network. Otherwise, when the VoLTE terminal is registered in the original mobile CS network, the service experience is different. It will be difficult to convince existing customers to increase the difficulty of deploying VoLTE/SRVCC commercial solutions.
  • the embodiments of the present invention provide a device for comprehensive decision making of a service domain and an access domain, and a method for calling a route.
  • An embodiment of the present invention provides a method for determining VoLTE call routing, including: when a mobile CS network is in a calling terminal, a comprehensive decision is made in a service domain and an access domain in a mobile CS network. When the device determines that the terminal is dual-registered, the T-ADS process is performed to determine the access domain.
  • the device that comprehensively decides the service domain and the access domain in the mobile CS network is an HLR.
  • the foregoing method further includes:
  • the MGCF media gateway control function
  • the MGCF adds a configuration identifier to the session initiation protocol (SIP) message, where the setting identifier is used to indicate that the LTE/IMS network does not need to perform service domain and access domain synthesis. decision making.
  • SIP session initiation protocol
  • the setting identifier is an access code (AC).
  • the foregoing method further includes:
  • the call session control function finds that the session message does not have the setting identifier added by the MGCF from the LTE/IMS network, the device domain of the service domain and the access domain comprehensive decision in the LTE/IMS network is determined. Whether the terminal is double registered.
  • the mobile CS network is at least one of the following: a global mobile communication system (GSM), a wideband code division multiple access (WCDMA), a code division multiple access (CDMA), a CDMA2000, and a time division synchronization code. Multiple access (TD-CDMA) network.
  • GSM global mobile communication system
  • WCDMA wideband code division multiple access
  • CDMA code division multiple access
  • CDMA2000 CDMA2000
  • TD-CDMA Time division synchronization code. Multiple access
  • the terminal is at least one of the following: a multi-mode single-standby terminal of the VoLTE type, a V6LTE terminal supporting the SRVCC, a multi-mode single-standby terminal supporting the global microwave connection access and the CS network, and the support Multimode single standby terminal for WiFi and CS networks.
  • the embodiment of the present invention further provides a method for determining a VoLTE call route, including: when the LTE/IMS network is inbound to the terminal, the device in the LTE/IMS network in the service domain and the access domain comprehensive decision determines that the terminal is dual-registration When the T-ADS process is performed, the access domain is determined.
  • the device that comprehensively determines the service domain and the access domain in the LTE/IMS network is the first service concentration and continuous application server (SCC AS) in the IMS network.
  • the method further includes:
  • the equipment in the service domain and the access domain integrated decision in the LTE/IMS network performs the T-ADS process to determine the access domain when the terminal is dual-registered, selects the mobile CS network to fall, and the LTE/IMS network deregisters the CS network HLR. In the dual registration state, only the registration status of the CS network is retained.
  • the device in the mobile CS network in the service domain and the access domain comprehensive decision cancels the service domain and the access domain comprehensive decision operation according to the obtained false registration information of the IMS network user, and only selects the CS network to perform Business domain and access domain operations.
  • the method further includes:
  • the last SCC AS in the IMS network disables the T-ADS function.
  • the embodiment of the present invention further provides a device for comprehensive decision making of a service domain and an access domain, including: a judging unit configured to determine whether the terminal is dual-registered when the mobile CS network enters the calling terminal;
  • the decision unit is configured to perform a T-ADS process decision access domain when the terminal is dual-registered.
  • the above device is an HLR.
  • the embodiment of the present invention further provides another device for comprehensive decision making of the service domain and the access domain, including: a determining unit, configured to determine whether the terminal is dual-registered when the terminal is inbound from the LTE/IMS network;
  • the decision unit is configured to perform a T-ADS process decision access domain when the terminal is dual-registered.
  • the device is the first SCC AS in the IMS.
  • the embodiment of the present invention further provides a computer storage medium, the computer storage medium comprising a set of instructions, when the instruction is executed, causing at least one processor to perform the method for determining a VoLTE call route.
  • the technical solution of the embodiment of the present invention by extending the HLR in the 2G/3G mobile network and the SCC AS in the IMS network, comprehensively making decisions through the service domain and the access domain, so that it is similar to VoLTE or
  • the domain of the service provided by the VoLTE terminal with the SRVCC function is consistent with the domain of the terminal access network, which simplifies the VoLTE/SRVCC routing process and avoids problems such as call routing, complex service execution, repeated charging, and roaming service triggering.
  • FIG. 1 is a signaling flowchart of a terminal registering in a mobile CS network and calling a called party from a mobile CS network according to an embodiment of the present invention
  • FIG. 2 is a flow chart of signaling that a terminal registers in a LTE/IMS network and calls a call from a mobile CS network according to an embodiment of the present invention
  • FIG. 3 is a flow chart of signaling that a terminal registers in an LTE/IMS network to make a call from an IMS network according to an embodiment of the present invention
  • FIG. 4 is a flowchart of a call signaling performed by an incoming call from an IMS network in a mobile CS network according to an embodiment of the present invention
  • FIG. 5 is a schematic structural diagram of a device for comprehensive decision making of a service domain and an access domain according to Embodiment 2 of the present invention
  • FIG. 6 is a schematic structural diagram of a device for comprehensive decision making of a service domain and an access domain according to Embodiment 3 of the present invention.
  • This embodiment proposes: a VoLTE/SRVCC multimode single standby terminal registration network as a service network
  • the network that is, registered in the mobile CS network, performs services on the mobile CS network, and the LTE/IMS network is registered to perform services on the LTE/IMS network.
  • the mobile CS network is selected to perform services and page the terminal.
  • Such users may be traditional 2G CS users, 3G CS users, LTE/CSFB users, VoLTE users or VoLTE with SRVCC handover. Functional users and so on;
  • the LTE/IMS network is selected to perform the service and page the terminal, including but not limited to VoLTE users, VoLTE users with SRVCC handover function;
  • the service domain selection can also be based on the operator's policy to join the unconditional CS network routing policy in the roaming state when there is no carrier VoLTE roaming agreement, even if the called user has the IMS registration status, select CS to land.
  • the CSFB voice solution will be used in this scenario.
  • the embodiment provides a method for deciding VoLTE call routing, which not only supports VoLTE call routing for comprehensive decision of service domain and access domain, but also VoLTE terminal call routing decision supporting SRVCC function.
  • the method includes the following operations:
  • the device in the mobile CS network in the service domain and the access domain comprehensive decision determines whether the terminal is dual-registered, and when the terminal double-registers, performs a T-ADS process to determine the access domain. Therefore, the actual implementation of the service domain and the access domain is unified in the same network.
  • the device that comprehensively determines the service domain and the access domain in the mobile CS network may be an HLR.
  • HLR Home Location Register
  • the method may further include the following operations:
  • the device in the service domain and the access domain comprehensive decision in the LTE/IMS network determines whether the terminal is dual-registered, and performs T-ADS process decision access when the terminal double-registers.
  • the domain ensures that the service domain and the access domain are actually implemented in the same network.
  • the device that comprehensively determines the service domain and the access domain in the LTE/IMS network may be the first SCC AS in the IMS. Of course, it can also be other devices with comprehensive decision-making capabilities of the service domain and the access domain.
  • SCP Intelligent Network Devices
  • the mobile CS network involved in this application includes not only GSM and WCDMA networks, but also CDMA, CDMA2000 and TD-CDMA networks.
  • the terminal in this application includes not only VoLTE-type multi-mode single-standby terminals, but also VoLTE terminals supporting SRVCC, multi-mode single-standby terminals supporting WiMax and CS networks, and multi-mode single-standby terminals supporting WiFi and CS networks.
  • the service domain and the access domain make a comprehensive decision, select the IMS landing, and after the call is routed to the IMS network, repeat the service in the first SCC AS of the IMS network.
  • the integrated decision of the domain and the access domain may be used by the MGCF to add a setting identifier to the SIP message when the call passes through the MGCF.
  • the setting identifier is used to indicate that the LTE/IMS network does not need to perform comprehensive decision of the service domain and the access domain, thereby preventing The first SCC AS is triggered again in the IMS to make decisions to improve system resource utilization.
  • the setting identifier can adopt AC.
  • the first SCC AS in the IMS network makes a comprehensive decision of the service domain and the access domain, selects the mobile CS network to land, and after the call is routed to the mobile CS network, the HLR repeats the service. Domain and access domain integrated decision making.
  • the fake registration information of the IMS network user can be obtained by the HLR, and the comprehensive decision operation of the service domain and the access domain is cancelled according to the false registration information of the IMS network user, that is, the HLR can only query one CS state, and the integrated decision will not be made.
  • the HLR can obtain the virtual branch registration information of the IMS network user in any manner. For example, when the mobile CS network is selected as the mobile CS network in the IMS network, the IMS network user registration status can be actively registered, or the HLR identifier IMS can be notified. False registration behavior of network users, etc.
  • HLR knows the registration status of the user in the mobile CS network (including LTE/CSFB), and also needs to get User status in the LTE/IMS network.
  • the user status of the HLR to obtain the IMS includes but is not limited to the following three modes:
  • the mobile application part (MAP) message can be sent to the IMS home subscriber server (HSS) through the HLR.
  • HSS home subscriber server
  • the IMS network device actively notifies the HLR user. The registration status in the IMS network.
  • the HLR and IMS HSS are combined into a unified platform and obtained through internal messages.
  • the premise of the first SCC AS in the IMS network as the service domain and the access domain is: SCC AS knows the registration status of the user in LTE/IMS, and also needs to obtain the mobile CS network (including LTE/CSFB) network. User registration status.
  • the SCC AS is contracted to the third party:
  • the registration status of the user in the CS can be obtained by sending a MAP message query to the HLR;
  • the method for obtaining the user status of the IMS by the HLR and the method for the SCC AS to obtain the registration status of the user in the HLR are not limited.
  • Figure 1 shows the process in which the terminal is registered in the mobile CS network, and the called party is called from the mobile CS network.
  • the process includes:
  • the Gateway Mobile Switching Center Show receives the Initial Address Message (IMM)
  • the terminal if the operator policy selects the mobile CS network, the terminal only registers with the mobile CS network, does not register with the LTE/IMS network, and queries through the T-ADS, and the result is the mobile CS network.
  • the decision-making is that the mobile CS network is a unified service domain and access domain, and subsequently carried out according to the normal mobile CS network call flow.
  • MAP P O VIDE RO AMING NUMBER , PRN Home Mobile Services Switch Center
  • the MSC allocates a CS domain number (CS N), and feeds back to the HLR through a PRN response (Rsp) message;
  • the GMSC constructs a call setup message IAM based on the received CSRN, and according to the CSRN Routing to the home MSC;
  • the MSC sends a call setup message to the base station to page the user.
  • FIG. 2 is a process in which a terminal is registered in an LTE/IMS network, and a called party is called from a mobile CS network, and a paging page is called. The process includes:
  • the GMSC receives the incoming call session establishment message IAM;
  • the GMSC sends an SRI message to the HLR, and the HLR determines whether the called terminal is dual-registered. For example, the dual registration performs the standard T-ADS process, and the T-ADS determines the access domain to ensure that the service domain and the access domain are actually unified. In the same network;
  • the terminal is only registered in the LTE/IMS network, is not registered in the mobile CS network, and is queried by T-ADS, and the result is LTE/IMS network, which is integrated.
  • the decision is that the LTE/IMS network is a unified service domain and access domain.
  • the LTE/IMS network is selected to perform the service and access.
  • the HLR constructs the IMS Routing Number (IMSR) as the prefix plus the called number, that is, IMRN (AC+B) as the new called party. The number is fed back to the GMSC through the SRI sp message;
  • This embodiment uses the HLR to generate the IM N as an example, and the method including the HLR to the IMS any network element to query the IMRN is also applicable.
  • the GMSC constructs a new call message IAM, and uses IMRN (AC+B) as the new called number to be routed to the MGCF through the AC;
  • the MGCF performs mapping of the IAM message to the SIP message, and deletes the AC to be called.
  • the embodiment of the present invention does not elaborate how the MGCF adds the AC to the session message, for example, to the customized SIP header, as a special parameter of the existing SIP header, as long as it does not affect the normal progress of the call flow, and is easy to be IMS.
  • the initial trigger Criteria (iFC) can be understood.
  • the CSCF finds that the "AC" identifier added by the MGCF in the session message does not trigger the first SCC AS to make a comprehensive decision of the service domain and the access domain, and directly sends a session establishment message according to the iFC triggering rule.
  • the Multimedia Telephony Service Application Server performs a service to send a session establishment message to the CSCF;
  • the CSCF sends a session establishment message to the last service server SCC AS of the IMS;
  • the last SCC AS no longer performs the access domain selection procedure T-ADS according to the 3GPP and GSMA standards, only performs the SRVCC handover anchor preparation procedure, and the SCC AS sends a session establishment message to the CSCF.
  • the CSCF sends the session establishment to the LTE base station to page the user.
  • FIG. 3 is a process in which a terminal is registered in a mobile LTE/IMS network, and a called party is called from the IMS network, and a route paging is called.
  • the process includes:
  • the calling party enters the call from the IMS network, the calling party is any IMS user, and the incoming CSCF route is Call
  • the CSCF finds that there is no "AC" identifier added by the MGCF in the session message, and triggers the first SCC AS to perform the service domain and the access domain comprehensive decision;
  • the terminal Since the terminal is actually registered in the LTE/IMS network, the result of the first SCC AS performing the service domain and the access domain comprehensive decision is to select the LTE/IMS network, and the SCC AS sends a session establishment message to the CSCF;
  • the CSF sends a session establishment message to the MMTEL AS to perform the IMS service according to the iFC triggering rule;
  • MMTELAS performs the service and sends a session establishment message to the CSCF;
  • the CSCF sends a session establishment message to the last IMS according to the iFC triggering rule.
  • the SCC AS that is the last contracted in the IMS network no longer performs the access domain selection process T-ADS according to the standards of 3GPP and GSMA, and only performs the SRVCC handover anchor preparation process, and the SCC AS sends a session establishment message to the CSCF;
  • the CSCF sends the session establishment to the LTE base station to page the user.
  • a technician having a basic mobile network call procedure in the field of the present invention can see that, in this example, in addition to triggering the first SCC AS to perform the service domain and the access domain (SDS&T-ADS), the terminal call is registered in the LTE network from the IMS network.
  • the user flow of the /IMS network is exactly the same as that of a normal IMS user calling an IMS user.
  • the T-ADS decision is migrated from the last SCC AS contracted by the IMS to the first SCC AS.
  • Figure 4 shows the process in which the terminal is registered in the mobile CS network, and the called party is called from the IMS network, and the paging page is called.
  • the process includes:
  • the calling party enters the call from the IMS network, and the calling party is any IMS user, and the incoming CSCF route is called; 102.
  • the CSCF finds that there is no "AC" identifier added by the MGCF in the session message, and triggers the first SCC AS to perform the service domain and the access domain comprehensive decision;
  • the terminal Since the terminal is actually registered in the mobile CS network, the result of the first SCC AS performing the service domain and the access domain comprehensive decision is to select the mobile CS network;
  • the SCC AS finds that the user is registered in both the mobile CS network and the LTE/IMS network, and the result of the comprehensive decision of the service domain and the access domain is the mobile CS network, the network IMS status is notified to be a virtual state, and the method includes Sending a Purge message to notify the HLR or deregistering the IMS network status, etc.; then the SCC AS adds AC before the called party, that is, the called number is changed to AC+B.
  • the session establishment message constructed by the SCC AS carrying the new called number is sent to the CSCF.
  • the CSCF routes the session establishment message to the MGCF according to the AC;
  • the MGCF deletes the pre-call AC according to the routing rule, and converts the SIP message into an IAM message and sends it to the GMSC;
  • the GMSC sends an SRI message to the HLR;
  • the HL receives the SRI message. Since the first SCC AS in the IMS network has been registered as the called party to deregister the user status of the IMS network, or the HLR is notified, the IMS status is in a false state, so the HLR only needs to consider The registration status of the mobile CS network, the mobile CS network is selected to perform the landing paging user, and the HLR sends a PRN message to the home MSC according to the updated vMSC address of the terminal location;
  • the MSC allocates CSRN, and feeds back to the HLR through the PRN Rsp message;
  • the HLR feeds the CSRN to the GMSC through the SRI Rsp message;
  • the GMSC constructs a call setup message IAM according to the CSRN and routes to the home MSC according to the CSRN. 111.
  • the MSC sends a call setup message (set) to the base station to page the user.
  • a technician having a basic mobile network call procedure in the field of the present invention can see that the flow described in this example terminates the call from the IMS network in addition to triggering the first SCC AS implementation service domain and access domain (SDS&T-ADS) comprehensive decision.
  • the user flow registered on the mobile CS network is exactly the same as the normal IMS user calling the mobile CS network user process.
  • the T-ADS decision is migrated from the last SCC AS contracted by the IMS to the first SCC AS. It is avoided that the user may not be registered to perform business on the IMS network.
  • Example 2
  • This embodiment provides a device for comprehensive decision making of a service domain and an access domain. As shown in FIG. 5, at least the following units are included:
  • the determining unit 51 is configured to determine whether the terminal is dual-registered when the terminal is inbound from the mobile CS network;
  • the decision unit 52 is configured to perform the T-ADS process to determine the access domain when the terminal is dual-registered, so as to ensure that the service domain and the access domain are actually executed in the same network.
  • the foregoing service domain and the access domain integrated decision device may be an HLR.
  • the determining unit 51 and the determining unit 52 may be a central processing unit (CPU), a digital signal processor (DSP) or a programmable logic in a device that comprehensively determines the service domain and the access domain.
  • Array FPGA, Field -
  • This embodiment provides a device for comprehensive decision making of a service domain and an access domain. As shown in FIG. 6, at least the following units are included:
  • the determining unit 61 determines whether the terminal is dual-registered when the terminal is inbound from the LTE/IMS network;
  • the decision unit 62 when the terminal is dual-registered, performs a T-ADS process decision access domain to ensure that the service domain and the access domain are actually executed in the same network.
  • the determining unit 61 and the determining unit 62 may be a CPU, DSP, or FPGA in the device that is comprehensively determined by the service domain and the access domain.
  • the determining unit 61 and the determining unit 62 may be a CPU, DSP, or FPGA in the device that is comprehensively determined by the service domain and the access domain.
  • the associated hardware may be stored in a computer readable storage medium, such as a read only memory, a magnetic disk, or an optical disk.
  • all or part of the steps of the above embodiments may also be implemented using one or more integrated circuits.
  • each module/unit in the above embodiment may be implemented in the form of hardware or in the form of a software function module. This application is not limited to any specific combination of hardware and software.
  • embodiments of the present invention can be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of a hardware embodiment, a software embodiment, or an embodiment of a combination of software and hardware. Moreover, the invention can take the form of a computer program product embodied on one or more computer usable storage media (including but not limited to disk storage and optical storage, etc.) including computer usable program code.
  • the computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device.
  • the apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.

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Abstract

一种业务域和接入域综合决策的设备及长期演进语音VoLTE呼叫路由的方法。该方法包括:从CS网络或LTE/IMS网络入呼终端时,由业务域和接入域综合决策的设备确定所述终端是双注册时,执行T-ADS流程决策接入域,实现业务域和接入域的统一。

Description

一种业务域和接入域综合决策的设备及呼叫路由的方法 技术领域
本发明涉及通信领域, 特别涉及一种业务域和接入域综合决策的设备 及长期演进 (Long Term Evolution, LTE)语音 VoLTE (Voice over LTE)呼叫路 由的方法。 背景技术
IP多媒体子系统 ( IP Multimedia Subsystem, IMS )是未来多媒体通信 的发展方向, 也是下一代网络最为重要的组成部分。 它是第三代合作伙伴 计划( Third Generation Partnership Project, 3GPP )提出的支持 IP 多媒体业 务的子系统。
基于 IMS 的 VoLTE是 3GPP关于 LTE网絡语音解决方案公认的主要 发展方向。
由于 LTE网絡部署初期的覆盖不足, 为了保证语音业务的连续性, 需 要使用单射频语音呼叫连续性 ( Single Radio Voice Call Continuity, SRVCC ) 技术, 利用现有移动电路交换(Circuit-Switched, CS ) 网络的广覆盖性, 将语音业务从 LTE网络切换至移动 CS网络, 保持语音业务的连续性。
从运营的角度考虑, 部署 LTE网络的运营商, 大部分有移动 CS 网络 运营的经验, 希望给用户更好的选择和无缝的体验。 在 VoLTE 或 VoLTE/SRVCC方案部署初期, 很大一部分用户从原有 3G网络发展而来, 用户及运营商都希望新的 VoLTE 语音解决方案可以满足用户无论注册在 LTE/IMS网络, 还是移动 CS网络, 仍使用原有号码。 对运营商而言节省了 号码资源, 筒化引入 LTE/IMS网络初期的号码路由规划成本。 用户要求可 以自由的更换 CS、 VoLTE和 SRVCC终端而无需通知运营商是基本要求, 并且至少要求在原有 cs网络, 业务体验的种类和质量不应有变化。
现实中 VoLTE终端, 包括带 SRVCC切换功能的 VoLTE终端, 可能同 时具备电路域回落( Circuit Switched Fallback, CSFB ) 的注册能力。 因此, 即使用户长期驻留在 LTE网络中,在移动 CS网络的归属位置寄存器( Home Location Register, HLR )和 LTE/IMS网络中的双注册是同时存在的。 同时, 用户从 LTE网络切换到移动 CS网络, 并不注销在 LTE/IMS中的状态, 也 导致用户虚假双注册的存在。 因此, 必须通过进一步的技术方法, 确定用 户真实注册的网络。
3GPP标准中定义了接入域选择 ( Terminated Access Domain Selection, T-ADS ) 功能, 即终端如既注册在 CS 网络, 也注册在 IMS 网络, T-ADS 功能通过比较 GPRS服务支持节点 ( Serving GPRS Support Node, SGSN ) 和移动性管理实体(Mobility Management Entity, MME ) 中用户最后最新 活动时间 ( the last active time ), 来决策用户实际可能注册网络。 如果 MME 保存的 the last active time时间最新, 针对带 SRVCC功能的 VoLTE终端则 选择 LTE/IMS网络落地, 如果 SGSN保存的 the last active time时间最新, 针对带 SRVCC功能的 VoLTE终端则选择 CS网络落地。
3GPP对基于 IMS的 VoLTE呼叫, 或带 SRVCC技术的 VoLTE呼叫进 行了部分标准化, 主要是规范了语音呼叫流程, 及保持通话连续性的切换 过程。 由于多模单待终端的特性, 终端在非切换状态下, 只能选择一个网 络进行注册(注册在 LTE/IMS网络或移动 CS网络)。
根据 VoLTE的 IR.64标准提供的 VoLTE流程, 要求所有来自移动 CS 网络终呼 VoLTE用户, 或带 SRVCC功能的 VoLTE用户都要求移动 CS网 络通过 CAMEL触发的方式, 将会话转移到 IMS网络, 在 IMS网络提供业 务, 无论当前 SRVCC用户实际注册在移动 CS网络, 还是 LTE/IMS网络。
上述方法的显著缺点是: 1 )、 用户实际注册在移动 CS网络时, 从移动 CS网络的终呼, 呼叫路 由迂回到 IMS网络做业务, 导致信令和媒体迂回, 延长呼叫建立时间, 浪 费信令和媒体资源。
2 )、 用户注册在移动 CS网络, 在漫游场景时回到 IMS 网络做主叫业 务存在漫游 CAMEL触发互通问题, 实际应用中运营商被迫放弃主叫业务 在 IMS网络触发, 导致被叫业务集中在 IMS网络执行, 而主叫业务仍然遗 留在移动 CS网络执行。
3 )、 SRVCC用户注册在移动 CS网络时, 从移动 CS网络的终呼, 业务 在 IMS 网络执行会出话单, 在移动 CS 网络落地时也出话单, 带来话单关 联或消除重复问题, 增加了话单处理的复杂性。
4 )、 S VCC用户注册在移动 CS 网络时, 从移动 CS 网络的终呼, 到 IMS网络故业务, 再路由回到移动 CS网络落地寻呼用户, 存在补充业务执 行结果的不确定性, 如遇忙及无应答前转, 可能即在 IMS网络发生, 也可 能在 CS网络发生, 甚至同时发生。
5 )、 此方法要求所有业务都要到 IMS 网络中执行, 在 SRVCC商用部 署初期, 至少要求所有传统业务都要移植到 IMS网络, 否则, VoLTE终端 注册在原有移动 CS网络时, 业务体验不同, 将难以说服存量客户, 增加了 VoLTE/SRVCC商用方案部署的困难。
因此, 研究更有效的 VoLTE/SRVCC路由方案, 解决上述问题, 对推 动 VoLTE产业的发展有重大现实意义。 发明内容
为解决现有存在的技术问题, 本发明实施例提供一种业务域和接入域 综合决策的设备及呼叫路由的方法。
本发明实施例提供了一种决策 VoLTE呼叫路由的方法, 包括: 从移动 CS网络入呼终端时, 移动 CS网络中业务域和接入域综合决策 的设备确定所述终端是双注册时, 执行 T-ADS流程决策接入域。
可选地, 上述方法中, 所述移动 CS网络中业务域和接入域综合决策的 设备为 HLR。
可选地, 上述方法还包括:
所述移动 CS 网络中业务域和接入域综合决策的设备在所述终端双注 册时, 执行 T-ADS流程决策接入域后, 选择 LTE/IMS网络落地, 呼叫路由 到 LTE/IMS网络, 在呼叫经过媒体网关控制功能 (MGCF ) 时, MGCF在 会话发起协议( SIP ) 消息中增加设定标识, 其中, 所述设定标识用于指示 LTE/IMS网絡无需进行业务域和接入域综合决策。
可选地, 上述方法中, 所述设定标识为接入码(Access Code, AC )。 可选地, 上述方法还包括:
从 LTE/IMS网络入呼终端时, 呼叫会话控制功能(CSCF )发现会话消 息中不具有 MGCF添加的设定标识时, 所述 LTE/IMS网络中业务域和接入 域综合决策的设备判断所述终端是否双注册。
可选地, 上述方法中, 所述移动 CS网络为以下至少之一: 全球移动通 信系统( GSM )、宽带码分多址( WCDMA )、码分多址( CDMA )、 CDMA2000、 时分同步码分多址( TD-CDMA ) 网络。
可选地, 上述方法中, 所述终端为以下至少之一: VoLTE 类的多模单 待终端、 支持 SRVCC的 V6LTE终端、 支持全球微波亙联接入和 CS网络的 多模单待终端、 支持 WiFi和 CS网络的多模单待终端。
本发明实施例还提供了一种决策 VoLTE呼叫路由的方法, 包括: 从 LTE/IMS网络入呼终端时, LTE/IMS网络中业务域和接入域综合决 策的设备确定所述终端是双注册时, 执行 T-ADS流程决策接入域。
可选地, 上述方法中, 所述 LTE/IMS网络中业务域和接入域综合决策 的设备为 IMS网络中第一个业务集中和连续应用服务器 (SCC AS )。 可选地, 上述方法中, 所述方法还包括:
所述 LTE/IMS网络中业务域和接入域综合决策的设备在所述终端双注 册时,执行 T-ADS流程决策接入域,选择移动 CS网络落地, 同时 LTE/IMS 网络注销 CS网络 HLR中的双注册状态, 只保留 CS网络的注册状态。 呼 叫路由到移动 CS网络后, 移动 CS网络中业务域和接入域综合决策的设备 根据已获取的 IMS网络用户的虚假注册信息, 取消业务域和接入域综合决 策操作, 只选择 CS网络执行业务域和接入域操作。
可选地, 上述方法中, 所述方法还包括:
所述 IMS网络中第一个 SCC AS执行 T-ADS流程后,所述 IMS网絡中 最后一个 SCC AS禁用 T-ADS功能。
本发明实施例又提供了一种业务域和接入域综合决策的设备, 包括: 判断单元, 配置为从移动 CS网络入呼终端时, 判断所述终端是否双注 册;
决策单元, 配置为在所述终端双注册时,执行 T-ADS流程决策接入域。 可选地, 上述设备为 HLR。
本发明实施例还提供了另一种业务域和接入域综合决策的设备, 包括: 判断单元, 配置为从 LTE/IMS网络入呼终端时, 判断所述终端是否双 注册;
决策单元, 配置为在所述终端双注册时,执行 T-ADS流程决策接入域。 可选地, 上述设备为 IMS中第一个 SCC AS。
本发明实施例又提供了一种计算机存储介盾, 所述计算机存储介质包 括一组指令, 当执行所述指令时, 引起至少一个处理器执行上述的决策 VoLTE呼叫路由的方法。 本发明实施例的技术方案,通过扩展 2G/3G移动网络中的 HLR及 IMS 网络中的 SCC AS , 通过业务域和接入域综合决策, 使得为类似 VoLTE或 带 SRVCC功能的 VoLTE终端提供业务服务的域和终端接入网络的域一致, 简化了 VoLTE/SRVCC路由过程, 避免了呼叫路由迂回, 业务执行复杂, 重复计費, 漫游业务触发等问题。 附图说明
在附图 (其不一定是按比例绘制的) 中, 相似的附图标记可在不同的 视图中描述相似的部件。 具有不同字母后缀的相似附图标记可表示相似部 个实施例。
图 1为本发明实施例中终端注册在移动 CS网络中, 从移动 CS网络入 呼被叫的信令流程图;
图 2为本发明实施例中终端注册在 LTE/IMS网络中, 从移动 CS网絡 呼入做被叫的信令流程图;
图 3为本发明实施例中终端注册在 LTE/IMS网络中, 从 IMS网络呼入 做被叫的信令流程图;
图 4为本发明实施例中终端注册在移动 CS网络中, 从 IMS网络呼入 做被叫信令流程图;
图 5为本发明实施例 2中业务域和接入域综合决策的设备结构示意图; 图 6为本发明实施例 3中业务域和接入域综合决策的设备结构示意图。 具体实施方式
为使本发明的目的、 技术方案和优点更加清楚明白, 下文将结合附图 及实施例对本发明技术方案作进一步详细说明。 需要说明的是, 在不冲突 的情况下, 本申请的实施例和实施例中的特征可以任意相互组合。
实施例 1
本实施例提出: 类似 VoLTE/SRVCC 多模单待终端注册网络即服务网 络,也就是注册在移动 CS网络就在移动 CS网络执行业务,注册在 LTE/IMS 网络就在 LTE/IMS网络执行业务。
其中, 要求业务域选择原则如下:
第一, 如果用户仅注册在移动 CS网络, 则选择移动 CS网络执行业务 并寻呼终端, 这种用户可以是传统 2G CS用户, 3G CS用户, LTE/CSFB用 户, VoLTE用户或者 VoLTE带 SRVCC切换功能的用户等等;
第二, 如果用户仅注册在 LTE/IMS网络, 则选择 LTE/IMS网络执行业 务并寻呼终端, 这些用户包括但不限于 VoLTE用户, 带 SRVCC切换功能 的 VoLTE用户;
第三,业务域选择也可根据运营商策略在无运营商 VoLTE漫游协议时, 加入漫游状态下无条件选择 CS网络路由的策略, 即使被叫用户有 IMS注 册状态也选择 CS落地。 对于漫游 LTE终端, 在此场景下会使用 CSFB语 音解决方案落地。
基于上述思想, 本实施例提供一种决策 VoLTE呼叫路由的方法, 该方 法不仅支持业务域和接入域综合决策的 VoLTE 呼叫路由, 也包括支持 SRVCC功能的 VoLTE终端呼叫路由决策。 该方法包括如下操作:
从移动 CS网络入呼终端时, 移动 CS网络中业务域和接入域综合决策 的设备判断所述终端是否双注册, 并在所述终端双注册时, 执行 T-ADS流 程决策接入域, 从而保证业务域和接入域实际执行统一在同一个网络中。
其中, 移动 CS 网络中业务域和接入域综合决策的设备可以是 HLR。 当然也不限于 HLR, 一切具有业务域和接入域综合决策能力的设备均可。
在上述基础上, 该方法还可以包括如下操作:
从 LTE/IMS网络入呼终端时, LTE/IMS网络中业务域和接入域综合决 策的设备判断所述终端是否双注册, 并在所述终端双注册时, 执行 T-ADS 流程决策接入域, 从而保证业务域和接入域实际执行统一在同一个网络中。 其中, LTE/IMS网络中业务域和接入域综合决策的设备可以为 IMS中 第一个 SCC AS。 当然也可以是具有业务域和接入域综合决策能力的其他设 备。 如智能网设备(SCP ) 等。
而本申请中所涉及的移动 CS网络不仅包括 GSM、 WCDMA网络, 也 包括 CDMA、 CDMA2000及 TD-CDMA网络等。 本申请中的终端不仅包括 VoLTE类的多模单待终端,也包括支持 SRVCC的 VoLTE终端,支持 WiMax 和 CS网络的多模单待终端, 支持 WiFi和 CS网络的多模单待终端等。
另夕卜, 为了防止从移动 CS网络入呼的呼叫, 经 HLR故业务域和接入 域综合决策, 选择 IMS落地, 呼叫路由到 IMS网络后, 重复在 IMS网络的 第一个 SCC AS做业务域和接入域综合决策, 可以在呼叫经过 MGCF时, 由 MGCF在 SIP消息中增加设定标识, 该设定标识用于指示 LTE/IMS网絡 无需进行业务域和接入域综合决策, 从而防止在 IMS中再次触发到第一个 SCC AS进行决策, 以提高系统资源利用率。 具体地, 该设定标识可以采用 AC。
而为了防止从 LTE/IMS网络入呼的呼叫,在 IMS网络中第一个 SCC AS 做业务域和接入域综合决策, 选择移动 CS网络落地, 呼叫路由到移动 CS 网络后, HLR重复做业务域和接入域综合决策。 可以由 HLR获取 IMS网 络用户的虚假注册信息, 根据此 IMS网络用户的虚假注册信息, 取消业务 域和接入域综合决策操作, 即 HLR只能查询到一个 CS状态, 将不再 ^敁综 合决策。而 HLR获取 IMS网络用户的虚 支注册信息的方式可以采用任意方 式, 例如, 可以通过在 IMS网络中综合决策域选择为移动 CS 网络时, 主 动去注册 IMS网络用户注册状态, 或者通知 HLR标识 IMS网络用户的虚 假注册行为等。
从上述方法可以看出, HLR做业务域和接入域综合决策的前提是: HLR 知晓用户在移动 CS 网络 (包括 LTE/CSFB ) 的注册状态, 也需要得到 LTE/IMS网络中的用户状态。而 HLR获取 IMS的用户状态包括但不限于以 下三种方式:
第一,可以通过 HLR发送移动应用部分( Mobile Application Part, MAP ) 消息到 IMS归属用户服务器 ( Home Subscriber Server, HSS ) 查询获得; 第二,用户在 IMS网络注册时, IMS网络设备主动通知 HLR用户在 IMS 网络中的注册状态。
第三, HLR和 IMS HSS融合成统一的平台, 通过内部消息获取。 同样 地, IMS网络中第一个 SCC AS做业务域和接入域综合决策的前提是: SCC AS 知晓用户在 LTE/IMS 的注册状态, 也需要得到移动 CS 网絡(包括 LTE/CSFB )网络中的用户注册状态。 而 IMS网络中对 SCC AS签约第三方 种方式:
第一,可以通过向 HLR发送 MAP消息查询获得用户在 CS中的注册状 态;
第二, 通过 sh接口向 IMS HSS获取, IMS HSS再发送 MAP消息到 HLR中查询;
第三, HLR和 IMS HSS融合成统一的设备, SCC AS通过 sh接口获取 用户在移动 CS网络的注册状态。
而本实施例对 HLR获取 IMS的用户状态, 以及 SCC AS获取 HLR中 用户的注册状态的方法不作任何限制。
还要说明的是: 3GPP和 GSMA标准中规定 T-ADS应该在 IMS网络的 最后一个 SCC AS执行, 而本实施例的显著改进是: 在移动 CS网络 HLR 和 LTE/IMS网络第一个 SCC AS执行 T-ADS过程, 被叫流程开始时, 即进 行业务域和接入域综合确定。 因此, 为防止不必要的重复执行 T-ADS过程, IMS中最后一个 SCC AS应禁用 T-ADS功能, 只负责 SRVCC切换功能。 下面以各种应用场景为例, 说明上述方法的具体实现过程。
图 1为终端注册在移动 CS网络中, 从移动 CS网络入呼被叫, 路由寻 呼被叫落地的过程。 该过程包括:
101. 从移动 CS 网络入呼被叫, 网关移动交换中心 (Gateway Mobile Switching Center, GMSC展收到入呼会话建立消息( Initial Address Message, IAM )„
102. GMSC发送 MAP消息 ( MAP— SEND ROUTING— INFORMATION, SRI ) 消息给 HLR, HLR判断被叫终端是否双注册, 如果是双注册, 则执 行标准的 T-ADS流程, 即由 T-ADS来决策接入域, 以保证业务域和接入域 实际执行统一在同一个网络中;
这里, 在执行标准的 T-ADS流程中, 如果运营商策略选择移动 CS网 络,终端只在移动 CS网络注册,没有在 LTE/IMS网络注册,以及通过 T-ADS 查询, 结果为移动 CS网络时, 都会综合决策为移动 CS网络为统一的业务 域和接入域, 后续按正常的移动 CS网络呼叫流程进行。
103. HLR进行综合决策后, 选择移动 CS网络执行业务并接入, HLR 根据终端位置更新的拜访移动业务交换中心 ( Visited Mobile Services Switching Center , vMSC ) 地 址 , 发 送 MAP 消 息
( MAP P O VIDE RO AMING NUMBER , PRN)给归属移动业务交换中心 ( Mobile Services Switch Center, MSC );
基于本领域普通技术人员都清楚的原因, 这里没有再描述智能业务触 发流程。
104. MSC分配 CS域的路由号码(CS Routing Number, CS N ), 通 过 PRN应答( Rsp ) 消息反馈给 HLR;
105. HLR通过 SRI Rsp消息反馈 CSRN给 GMSC;
106. GMSC根据收到的 CSRN构造呼叫建立消息 IAM, 并根据 CSRN 路由到归属 MSC;
107. MSC发送呼叫建立消息 ( setup )给基站寻呼用户。
具备本发明领域基本移动网络呼叫流程的技术人员可以看出, 此场景 中除 HLR 实现业务域和接入域(SDS&T-ADS ) 综合决策外, 其他流程完 全和移动 CS 网络终呼被叫流程相同, 最大限度简化了新的 VoLTE, 或带 SRVCC切换功能的 VoLTE终端注册在移动 CS网络中的路由行为。 即使更 换移动 CS终端, LTE/CSFB终端, 也不影响网络侧的路由。 图 2为终端注册在 LTE/IMS网络中, 从移动 CS网络入呼被叫, 路由 寻呼被叫落地的过程。 该过程包括:
101.从移动 CS网络入呼被叫, GMSC接收到入呼会话建立消息 IAM;
102. GMSC发送 SRI消息给 HLR, HLR判断被叫终端是否双注册, 如 双注册执行标准的 T-ADS流程, 由 T-ADS来决策接入域, 以保证业务域和 接入域实际执行统一在同一个网络中;
这里, 在此流程中, 如果运营商策略选择 LTE/IMS 网络, 终端只在 LTE/IMS网络注册, 没有在移动 CS网络注册, 以及通过 T-ADS查询, 结 果为 LTE/IMS网络时, 都会综合决策为 LTE/IMS网络为统一的业务域和接 入域。
103. HL 进行综合决策后, 选择 LTE/IMS网络执行业务并接入, HLR 构造 IMS路由号码( IMS Routing Number, IMRN )为前缀加被叫号码, 即 IMRN(AC+B)作为新的被叫号码, 通过 SRI sp消息反馈给 GMSC;
本实施例以 HLR产生 IM N为例进行了说明, 同时包括 HLR到 IMS 任一网元查询 IMRN的方法也同样适用。
104. GMSC构造新的呼叫消息 IAM , 以 IMRN(AC+B)作为新的被叫号 码, 通过 AC路由到 MGCF;
105. MGCF执行 IAM消息到 SIP消息的映射, 将 AC删除, 以便被叫 B在 IMS网络的正常路由和执行业务; 同时, MGCF将 AC作为标识增加 到 SIP消息中, 以便后续防止 IMS网络中再次触发第一个 SCC AS进行业 务域和接入域综合决策, 优化业务流程。
本发明实施例不详细阐述 MGCF如何将 AC增加到会话消息中的, 如 放到定制的 SIP头部,作为已有 SIP头部的特殊参数, 只要不影响呼叫流程 的正常进行, 且易于为 IMS的初始触发规则( initial Filter Criteria, iFC )理 解即可。
106. CSCF根据 iFC触发规则,发现会话消息中有 MGCF添加的 "AC" 标识,将不再触发第一个 SCC AS做业务域和接入域综合决策,直接根据 iFC 触发规则, 发送会话建立消息给 MMTEL AS执行 IMS业务;
107. 多媒体电话业务应用服务器 ( Multimedia Telephony service Application Server, MMTEL AS )执行完业务将会话建立消息发送给 CSCF;
108. CSCF将会话建立消息发送给 IMS最后一个业务服务器 SCC AS;
109. 最后一个 SCC AS, 不再按 3GPP和 GSMA的标准执行接入域选 择流程 T-ADS, 仅执行 SRVCC切换锚定准备流程, SCC AS发送会话建立 消息给 CSCF。
110. CSCF将会话建立发送给 LTE基站寻呼用户。
具备本发明领域基本移动网络呼叫流程的技术人员可以看出, 此场景 中除 HLR实现业务域和接入域(SDS&T-ADS ) 综合决策外, LTE/IMS 网 络终呼时, 在最后一个 SCC AS不执行 T-ADS流程外, 其它流程完全和从 移动 CS网络终呼被叫 IMS用户流程相同, 最大限度筒化了新的 VoLTE, 或带 SRVCC切换功能的 VoLTE终端注册在 LTE/IMS网络中的路由行为。 图 3为终端注册在移动 LTE/IMS网络中, 从 IMS网络入呼被叫, 路由 寻呼被叫落地的过程。 该过程包括:
101. 主叫从 IMS网络入呼, 主叫为任意 IMS用户, 进入 CSCF路由被 叫;
102. CSCF根据 iFC触发规则,发现会话消息中没有 MGCF添加的 "AC" 标识, 将触发到第一个 SCC AS执行业务域和接入域综合决策;
103. 由于终端实际注册在 LTE/IMS网络, 第一个 SCC AS执行业务域 和接入域综合决策的结果为选择 LTE/IMS网络, SCC AS发送将会话建立 消息返回给 CSCF;
104. CSF根据 iFC触发规则,发送会话建立消息给 MMTEL AS执行 IMS 业务;
105. MMTELAS执行完业务将会话建立消息发送给 CSCF;
106. CSCF根据 iFC触发规则, 将会话建立消息发送给 IMS最后一个
107. IMS网络中最后签约的 SCC AS,不再按 3GPP和 GSMA的标准执 行接入域选择流程 T-ADS, 仅执行 SRVCC切换锚定准备流程, SCC AS发 送会话建立消息给 CSCF;
110. CSCF将会话建立发送给 LTE基站寻呼用户。
具备本发明领域基本移动网络呼叫流程的技术人员可以看出, 本实例 中除触发第一个 SCC AS执行业务域和接入域( SDS&T-ADS ) 综合决外, 从 IMS网络终呼注册在 LTE/IMS网络的用户流程,与普通的 IMS用户呼叫 IMS用户流程完全相同。 和 3GPP及 GSMA标准规定的 VoLTE呼叫流程相 比,仅仅是将 T-ADS决策从 IMS签约的最后一个 SCC AS移植到第一个 SCC AS执行。 图 4为终端注册在移动 CS网络中, 从 IMS网络入呼被叫, 路由寻呼 被叫落地的过程。 该过程包括:
101. 主叫从 IMS网络入呼, 主叫为任意 IMS用户, 进入 CSCF路由被 叫; 102. CSCF根据 iFC触发规则,发现会话消息中没有 MGCF添加的 "AC" 标识, 将触发到第一个 SCC AS执行业务域和接入域综合决策;
103. 由于终端实际注册在移动 CS网络,第一个 SCC AS执行业务域和 接入域综合决策的结果为选择移动 CS网络;
这里,如果 SCC AS发现用户在移动 CS网络和 LTE/IMS网络均进行了 注册, 且业务域和接入域综合决策的结果为移动 CS网絡, 则通知网絡 IMS 状态为虚^^状态, 方法包括发送 Purge消息通知 HLR或注销 IMS网络状态 等; 随后 SCC AS在被叫前增加 AC, 即被叫号码变换为 AC+B。 SCC AS 携带新的被叫号码构造的会话建立消息发送给 CSCF。
104. CSCF根据 AC将会话建立消息路由给 MGCF;
105. MGCF根据路由规则,删除被叫前 AC,同时将 SIP消息转换为 IAM 消息, 发送给 GMSC;
106. GMSC发送 SRI消息给 HLR;
107. HL 接收到 SRI消息, 由于 IMS网络中第一个 SCC AS已经去注 册为被叫在 IMS网络的用户状态进行了去注册, 或通知过 HLR, IMS状态 为虚假状态, 因此 HLR只需考虑移动 CS 网络的注册状态, 选择移动 CS 网络进行落地寻呼用户, HLR根据终端位置更新的 vMSC地址, 发送 PRN 消息给归属 MSC;
这里, 如无智能业务需要触发, 或有智能业务需要触发, 由于本领域 普通技术人员都了解流程的原因, 这里省略。 基于本领域普通技术人员都 清楚的原因, 这里没有再描述智能业务触发流程。
108. MSC分配 CSRN, 通过 PRN Rsp消息反馈给 HLR;
109. HLR通过 SRI Rsp消息反馈 CSRN给 GMSC;
110. GMSC根据 CSRN构造呼叫建立消息 IAM, 并根据 CSRN路由到 归属 MSC。 111. MSC发送呼叫建立消息 ( setup )给基站寻呼用户。
具备本发明领域基本移动网络呼叫流程的技术人员可以看出, 本实例 说明的此流程除触发第一个 SCC AS执行业务域和接入域( SDS&T-ADS ) 综合决策外, 从 IMS网络终呼注册在移动 CS 网络的用户流程, 与普通的 IMS用户呼叫移动 CS网络用户流程完全相同。 和 3GPP及 GSMA标准规 定的 VoLTE呼叫流程相比, 仅仅是将 T-ADS决策从 IMS签约的最后一个 SCC AS移植到第一个 SCC AS执行。避免了用户可能未注册在 IMS网络执 行业务。 实施例 2
本实施例提供一种业务域和接入域综合决策的设备, 如图 5 所示, 至 少包括如下单元:
判断单元 51, 配置为从移动 CS 网络入呼终端时, 判断终端是否双注 册;
决策单元 52, 配置为在终端双注册时, 执行 T-ADS流程决策接入域, 以保证业务域和接入域实际执行统一在同一个网络中。
具体地, 上述业务域和接入域综合决策的设备可以是 HLR。
实际应用时, 判断单元 51及决策单元 52可由业务域和接入域综合决 策的设备中的中央处理器 (CPU, Central Processing Unit ), 数字信号处理 器 (DSP, Digital Signal Processor ) 或可编程逻辑阵列 ( FPGA, Field -
Programmable Gate Array ) 实现。 实施例 3
本实施例提供一种业务域和接入域综合决策的设备, 如图 6 所示, 至 少包括如下单元:
判断单元 61,从 LTE/IMS网络入呼终端时,判断所述终端是否双注册; 决策单元 62, 在所述终端双注册时, 执行 T-ADS流程决策接入域, 以 保证业务域和接入域实际执行统一在同一个网络中。
具体地, 上述业务域和接入域综合决策的设备可以是 IMS 中第一个 实际应用时, 判断单元 61及决策单元 62可由业务域和接入域综合决 策的设备中的 CPU、 DSP或 FPGA实现。 本领域普通技术人员可以理解上述方法中的全部或部分步骤可通过程 序来指令相关硬件完成, 所述程序可以存储于计算机可读存储介质中, 如 只读存储器、 磁盘或光盘等。 可选地, 上述实施例的全部或部分步骤也可 以使用一个或多个集成电路来实现。 相应地, 上述实施例中的各模块 /单元 可以釆用硬件的形式实现, 也可以釆用软件功能模块的形式实现。 本申请 不限制于任何特定形式的硬件和软件的结合。
本领域内的技术人员应明白, 本发明的实施例可提供为方法、 系统、 或计算机程序产品。 因此, 本发明可釆用硬件实施例、 软件实施例、 或结 合软件和硬件方面的实施例的形式。 而且, 本发明可采用在一个或多个其 中包含有计算机可用程序代码的计算机可用存储介质 (包括但不限于磁盘 存储器和光学存储器等 )上实施的计算机程序产品的形式。
本发明是参照根据本发明实施例的方法、 设备(系统)、 和计算机程序 产品的流程图和 /或方框图来描述的。 应理解可由计算机程序指令实现流程 图和 /或方框图中的每一流程和 /或方框、以及流程图和 /或方框图中的流程和 /或方框的结合。 可提供这些计算机程序指令到通用计算机、 专用计算机、 嵌入式处理机或其他可编程数据处理设备的处理器以产生一个机器, 使得 通过计算机或其他可编程数据处理设备的处理器执行的指令产生用于实现 在流程图一个流程或多个流程和 /或方框图一个方框或多个方框中指定的功 能的装置。 这些计算机程序指令也可存储在能引导计算机或其他可编程数据处理 设备以特定方式工作的计算机可读存储器中, 使得存储在该计算机可读存 储器中的指令产生包括指令装置的制造品, 该指令装置实现在流程图一个 流程或多个流程和 /或方框图一个方框或多个方框中指定的功能。
这些计算机程序指令也可装载到计算机或其他可编程数据处理设备 上, 使得在计算机或其他可编程设备上执行一系列操作步骤以产生计算机 实现的处理, 从而在计算机或其他可编程设备上执行的指令提供用于实现 在流程图一个流程或多个流程和 /或方框图一个方框或多个方框中指定的功 能的步骤。 以上所述, 仅为本发明的较佳实例而已, 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, 所做的任何修改、 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、 一种决策长期演进语音( VoLTE )呼叫路由的方法, 包括: 从移动电路交换 CS网络入呼终端时, 移动 CS网络中业务域和接入域 综合决策的设备确定所述终端双注册时, 执行接入域选择 T-ADS流程决策 接入域。
2、 如权利要求 1所述的方法, 其中, 所述移动 CS网络中业务域和接 入域综合决策的设备为归属位置寄存器 HLR。
3、 如权利要求 2所述的方法, 其中, 所述方法还包括:
所述移动 CS 网络中业务域和接入域综合决策的设备在所述终端双注 册时, 执行 T-ADS流程决策接入域后, 选择 LTE/IMS网络落地, 呼叫路由 到 LTE/IMS网络, 在呼叫经过媒体网关控制功能 MGCF时, MGCF在会话 发起协议 SIP消息中增加设定标识,其中,所述设定标识用于指示 LTEZIMS 网络无需进行业务域和接入域综合决策。
4、 如权利要求 3所述的方法, 其中, 所述设定标识为接入码 AC。
5、 如权利要求 3所述的方法, 其中, 所述方法还包括:
从 LTE/IMS网络入呼终端时, 呼叫会话控制功能 CSCF发现会话消息 中不具有 MGCF添加的设定标识时,所述 LTE/IMS网絡中业务域和接入域 综合决策的设备判断所述终端是否双注册。
6、 如权利要求 1至 5任一项所述的方法, 其中,
所述移动 CS 网络为以下至少之一: 全球移动通信系统 GSM、 宽带码 分多址 WCDMA、 码分多址 CDMA、 CDMA 2000、 时分同步码分多址 TD-CDMA网络。
7、 如权利要求 1至 5任一项所述的方法, 其中,
所述终端为以下至少之一: VoLTE 类的多模单待终端、 支持单射频语 音呼叫连续性 SRVCC的 VoLTE终端、支持全球微波互联接入和 CS网络的 多模单待终端、 支持 WiFi和 CS网络的多模单待终端。
8、 一种决策 VoLTE呼叫路由的方法, 包括:
从长期演进 /IP多媒体子系统 LTE/IMS网络入呼终端时, LTE/IMS网络 中业务域和接入域综合决策的设备确定所述终端是双注册时, 执行 T-ADS 流程决策接入域。
9、 如权利要求 8所述的方法, 其中, 所述 LTE/IMS网络中业务域和接 入域综合决策的设备为 IMS网络中第一个业务集中和连续应用服务器 SCC AS。
10、 如权利要求 9所述的方法, 其中, 所述方法还包括:
所述 LTE/IMS网络中业务域和接入域综合决策的设备在所述终端双注 册时, 执行 T-ADS流程决策接入域, 选择移动 CS网络落地, 呼叫路由到 移动 CS网络后, 移动 CS网络中业务域和接入域综合决策的设备根据已获 取的 IMS网络用户的虚假注册信息, 取消业务域和接入域综合决策操作。
11、 如权利要求 9所述的方法, 其中, 所述方法还包括:
所述 IMS网络中第一个 SCC AS执行 T-ADS流程后,所述 IMS网络中 最后一个 SCC AS禁用 T-ADS功能。
12、 一种业务域和接入域综合决策的设备, 包括:
判断单元, 配置为从移动 CS网络入呼终端时, 判断所述终端是否双注 册;
决策单元, 配置为在所述终端双注册时,执行 T-ADS流程决策接入域。
13、 如权利要求 12所述的设备, 其中, 所述设备为 HLR。
14、 一种业务域和接入域综合决策的设备, 包括:
判断单元, 配置为从 LTE/IMS网络入呼终端时, 判断所述终端是否双 注册;
决策单元, 配置为在所述终端双注册时,执行 T-ADS流程决策接入域。
15、 如权利要求 14所述的设备, 其中, 所述设备为 IMS中第一个 SCC
AS。
16、 一种计算机存储介质, 所述计算机存储介质包括一组指令, 当执 行所述指令时, 引起至少一个处理器执行如权利要求 1至 7任一项所述的 决策 VoLTE呼叫路由的方法、或执行如权利要求 8至 11任一项所述的决策 VoLTE呼叫路由的方法。
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