WO2010081435A1 - 寻呼系统、寻呼方法和设备 - Google Patents

寻呼系统、寻呼方法和设备 Download PDF

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Publication number
WO2010081435A1
WO2010081435A1 PCT/CN2010/070245 CN2010070245W WO2010081435A1 WO 2010081435 A1 WO2010081435 A1 WO 2010081435A1 CN 2010070245 W CN2010070245 W CN 2010070245W WO 2010081435 A1 WO2010081435 A1 WO 2010081435A1
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Prior art keywords
utran
bearer
signaling
paging message
access network
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PCT/CN2010/070245
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English (en)
French (fr)
Inventor
温立
吴晓波
张戬
胡华东
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华为技术有限公司
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Publication of WO2010081435A1 publication Critical patent/WO2010081435A1/zh

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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W68/00User notification, e.g. alerting and paging, for incoming communication, change of service or the like

Definitions

  • the present invention relates to wireless communication technologies, and in particular, to a paging system, a paging method, and a device.
  • Background Art In order to improve system performance, the second generation communication system / third generation communication system (2/3G) is developing to the Long Term Evolution (LTE).
  • the 2G wireless access network is a Global System for Mobile communications/Enhanced Data Rate for GSM Evolution Radio EDGE Radio Access Network (GERAN), and the 3G wireless access network is a universal terrestrial wireless connection.
  • GERAN Global System for Mobile communications/Enhanced Data Rate for GSM Evolution Radio EDGE Radio Access Network
  • the Internet access network (Universal Terrestrial Radio Access Network, UTRAN) and the LTE radio access network are Evolved Universal Terrestrial Radio Access Networks (EUTRAN.
  • the 2/3G core network includes Circuit Switched, CS) Domain and Packet Switched (PS) domain.
  • Voice service is usually provided by the CS domain in 2/3G.
  • IMS IP Multimedia Subsystem
  • S provides voice services, namely Voice over IP (VoIP).
  • VoIP Voice over IP
  • a solution is to use a generic access network (Generic Access Netw).
  • GANC Generic Access Network Controller
  • SAE LTE System Architecture Evolution
  • the LTE voice service is implemented by the GANC without deploying the MS.
  • the existing GAN-like architecture when the user equipment (User Equipment, UE) resides at 2/3G, the bearer and PS domain of the CS domain need to be established. Bearer, when the UE camps on LTE, it needs to establish a bearer in LTE.
  • the embodiments of the present invention provide a paging system, a paging method, and a device, which solve the problem of reconstructing a large number of signaling streams and data streams from the bearer in the existing LTE.
  • An embodiment of the present invention provides a paging system, including a user equipment UE for receiving a paging message, where the user equipment is in a circuit domain of a global mobile communication system radio access network GERAN or a universal terrestrial radio access network UTRAN
  • the first signaling bearer is connected to the mobile switching center of the core network circuit domain
  • the user equipment is connected to the mobile switching center of the core network circuit domain by using the second signaling bearer in the packet domain of the GERAN or UTRAN
  • the user equipment is in the evolved universal
  • the terrestrial radio access network E-UTRAN is connected to the mobile switching center of the core network circuit domain through the third signaling bearer.
  • the embodiment of the invention provides a paging method, including:
  • the existing bearer that can be used for transmitting circuit domain signaling includes a second signaling bearer and a third signaling bearer; wherein the second signaling bearer is an MSC/VLR, a GANC, an SGSN that is connected to a circuit domain of a core network. And signaling bearers of the UTRAN and the UE; the third signaling bearer is a signaling bearer that connects the MSC/VLR, the GANC, the PDN_GW, the S_GW, the E-UTRAN, and the UE of the core network circuit domain.
  • the embodiment of the invention further provides a paging method, which is applied to the foregoing system, and includes:
  • An embodiment of the present invention provides a GANC, including:
  • a first receiving module configured to receive a paging message sent by the mobile switching center
  • a sending module configured to be connected to the first receiving module, configured to select one or more bearers from the existing bearer for transmitting circuit domain signaling to deliver the homing according to the pre-acquired radio access network type information
  • the call message is sent to the user equipment, and the existing bearer that can be used for transmitting circuit domain signaling includes a second signaling bearer and a third signaling bearer.
  • An embodiment of the present invention provides a UE, which is applied to the foregoing system, and includes:
  • a second receiving module configured to receive a paging message delivered by a bearer
  • a processing module configured to be connected to the second receiving module, configured to determine whether the paging message sent by another bearer is received, and if the paging message sent by another bearer is received, the The bearer message sent by the bearer.
  • FIG. 1 is a schematic structural diagram of a paging system according to a first embodiment of the present invention
  • FIG. 2 is a schematic flow chart of a method according to a second embodiment of the present invention.
  • FIG. 3 is a schematic flowchart of Embodiment 1 of a method for sending a paging message according to an access network type according to a second embodiment of the present invention
  • FIG. 4 is a schematic flowchart of Embodiment 2 of a method for sending a paging message according to an access network type according to a second embodiment of the present invention
  • FIG. 5 is a schematic flowchart of a method according to a third embodiment of the present invention.
  • FIG. 6 is a structural diagram of a control plane protocol stack corresponding to a user equipment according to a third embodiment of the present invention.
  • FIG. 7 is a schematic structural diagram of a GANC according to a fourth embodiment of the present invention.
  • FIG. 8 is a schematic structural diagram of a UE according to a fifth embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The technical solutions of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments.
  • the GAN-like architecture can implement CS voice over the evolved PS (Evolved PS, EPS) domain, borrowing the GAN architecture to reuse the CS service network to implement VoIP over LTE (VoIP over LTE), without deploying a top S network.
  • the GAN switching mechanism can be enhanced by using the Single Radio Voice Call Continuity between IMS and CS (SR-VCC) switching mechanism, while using policy and charging control (Policy and Charging Control, PCC) to enhance the GANC control VoIP bearer.
  • SR-VCC Single Radio Voice Call Continuity between IMS and CS
  • PCC Policy and Charging Control
  • the typical coverage is that traditional 2/3G systems maintain large area coverage, while LTE/SAE systems complement the point coverage. In this case, the user may move between the LTE/SAE system and the 2/3G system more frequently.
  • ISR Idle-mode Signalling Reduction
  • the registration is performed according to the normal registration/update procedure, and the network allocates the temporary identifier and the location area identifier to the UE; when the UE enters another access system when the ISR is activated, the location update process is initiated, and the network allocates the temporary of the new system. ID and location domain ID.
  • the core network nodes that the two systems provide services for the UE are all registered in the HSS and provide services for the UE.
  • the registration/update process thereby reducing routing update signaling and saving air interface resources.
  • the network will send downlink data to the access system that responds to the paging message.
  • the UE accesses the LTE/SAE system and the 2/3G system respectively.
  • the MME and the SGSN respectively register with the HSS, and the UE obtains the packet network temporary mobile subscriber identity allocated by the SGSN of the 2/3G system respectively.
  • P-TMSI Packet-Temporary Mobile Subscriber Identity
  • RAI Routing Area Identity
  • GUI Globally Unique Temporary Identity
  • TAD Tracking Area Identity
  • the UE When the UE moves from LTE Up to 2/3G, the UE actively releases the LTE bearer. When the subsequent UE moves back to LTE from 2/3G, the UE needs to re-initiate the GANC discovery process, and re-establish the bearer transmitting the CS signaling, and carry the signaling to the MSC/V through the signaling. LR is registered. When the UE moves frequently between systems, this will increase the burden on the network and the UE, especially the air interface resources. If the network introduces the ISR mechanism, the idle mode UE is required to be in LTE and UTRAN/GERAN.
  • the embodiment of the present invention solves the problem of coexistence of CSoEPS and ISR, so as to reduce the large occupation of radio resources by air interface signaling.
  • an embodiment of the present invention provides a paging system, including a UE for receiving a paging message, where the UE connects to the MSC/VLR of the core network circuit domain through the first signaling bearer in the CS domain of the GERAN or UTRAN.
  • the UE is connected to the MSC/VLR of the core network circuit domain through the second signaling bearer in the PS domain of the GERAN or UTRAN, and the UE is connected to the MSC/VLR of the core network circuit domain through the third signaling bearer in the E-UTRAN.
  • FIG. 1 is a schematic structural diagram of a paging system according to a first embodiment of the present invention, including a UE 101, an evolved base station (eNodeB) 102 located in an E-UTRAN, a Mobile Management Entity (MME) 103, and a Serving SAE.
  • eNodeB evolved base station
  • MME Mobile Management Entity
  • S-GW 104 Packet Data Network SAE Gateway (PDN-GW) 105, General Packet Radio Service (GPRS) Supporting Node (SGSN) 106,
  • GANC 107 the Policy Control and Charging Rules Function (PCRF) 108, the Mobile Switching Center/Visitor Location Register (MSC/VLR) 109, and the base transceiver A Base Transceiver Station/NodeB (BTS/NodeB) 110, a Base Station Controller/Radio Network Controller (BSC/RNC) 111, an IP network 112, and a voice network 113.
  • BTS/NodeB Base Transceiver Station/NodeB
  • BSC/RNC Base Station Controller/Radio Network Controller
  • the UE 101 is connected to the eNodeB 102 through the LTE-Uu interface, the eNodeB 102 is connected to the MME 103 through the S1-MME interface, the eNodeB 102 is connected to the S-GW 104 through the S1-U interface, the MME 103 is connected to the S-GW 104 through the S11 interface, and the MME 103 is connected to the SGSN 106 through the S3 interface.
  • the MME 103 is connected to the GNC 107 through the Sv interface
  • the S-GW 104 is connected to the PDN-GW 105 through the S5 interface
  • the S-GW 104 is connected to the SGSN 106 through the S4 interface
  • the PDN-GW 105 is connected to the PCRF 108 through the S7 interface
  • the PDN-GW 105 is connected to the GANC 107 through the SGi interface
  • PDN - GW 105 is connected to IP network 112 (e.g., top S) through the SGi interface
  • SGSN 106 is connected to BSC/RNC 111 through Iu-PS/Gb
  • BSC/RNC 111 is connected to MSC/VLR 109 through Iu-CS/A interface
  • GANC107 passes Iu-CS/A The interface is connected to the MSC/VLR109.
  • the S-GW 104 and the PDN-GW 105 may be in the same physical node or may be in different physical nodes.
  • the MME 103 and the S-GW 104 may also be in the same physical node or separate physical nodes.
  • the interface signaling between them is converted to an internal node message.
  • Non-Access Stratum (NAS) signaling is transmitted between the UE and the GANC through the EPS bearer, and then sent to the MSC/VLR by the GANC analog BSC/RNC.
  • NAS Non-Access Stratum
  • the MME instructs the GANC to initiate an Intra/Inter-MSC handover through the Sv interface, and switches the CS service to the GERAN/UTRAN CS network.
  • the GANC role is similar to the BSS/RNS. Its main function is to provide a signaling channel between the UE and the MSC.
  • the UE connects to the GANC through the IP access network.
  • the GANC is responsible for data interaction between the user plane and the control plane.
  • GANC also includes MGW functionality, which converts 2G CS-based speech coding and IP-based speech coding. From an implementation point of view, the logical entity may be integrated into the MSC, or may exist separately, or even be integrated into the packet access network.
  • the interface between the GANC and the MSC may be an external interface or an internal interface (if the GANC is integrated into the MSC, the access is an internal interface), and the interface may be in the form of an Iu-CS interface, or an A interface, or other forms. Interface.
  • the connection relationship between the MSC and the GANC may be one-to-one, one-to-many, many-to-one or many-to-many.
  • the interface between the GANC and the packet access network SAE The Sv interface between the GANC and the MME, and the SGi interface between the GANC and the PDN-GW.
  • the system in the embodiment of the present invention includes three signaling bearers.
  • the first signaling bearer is a signaling bearer connected to the MSC/VLR, the GERAN, and the UE of the core network circuit domain (for example, shown by a short line in FIG. 1);
  • the second signaling bearer is a connected core network circuit.
  • the MSC/VLR, GAN (:, SGSN, UTRAN, and UE signaling bearers of the domain (as shown by the dotted line in FIG. 1);
  • the third signaling bearer is the MSC/VLR, GANC connecting the core network circuit domain.
  • the embodiment of the present invention retains the third signaling bearer of the LTE even when the UE moves from the LTE to the 2/3G.
  • the process of deleting the third signaling bearer implements the reservation of the third signaling bearer.
  • the specific retention time may be determined by the GANC according to the actual situation. This embodiment maintains the LTE bearer, that is, when the UE moves from LTE to 2/3G.
  • a schematic flowchart of the method according to the second embodiment of the present invention includes: Step 21: The GANC receives the paging message sent by the MSC/VLR. Step 22: The GANC obtains the available available transmission circuit according to the pre-acquired wireless access network type information.
  • One or more bearer delivery paging messages are selected in the bearer of the domain signaling, and the existing bearer that can be used for transmitting circuit domain signaling includes a second signaling bearer and a third signaling bearer.
  • the LTE bearer can avoid the problem of re-establishing a large amount of data streams and signaling flows caused by the LTE bearer when the UE moves back from the 2/3G to the LTE.
  • the E-UTRAN-based third may be used to transmit the circuit domain signaling when the UE moves from the E-UTRAN to the GERAN or UTRAN coverage area.
  • the signaling bearer remains connected.
  • the GANC may further include the above-mentioned radio access network type information: The GANC may perform the UE currently located in the PCC process for performing signaling bearer negotiation.
  • FIG. 3 is a schematic flowchart of Embodiment 1 of a method for sending a paging message according to an access network type according to a second embodiment of the present invention. In this embodiment, for a case where an ISR is not activated, the UE moves from LTE to 2 /3G.
  • the present embodiment includes: Step 31: The MSC/VLR sends the paging message of the voice network to the UE through the first bearer, that is, the UE sends the message to the UE through the Iu_CS/A interface, and the GERAN entity sends the message to the UE. For example, see The short line of Figure 1 is shown.
  • Step 33 After receiving the paging message, the GANC determines whether the UE is currently in the 2G according to the obtained access network type. If yes, go to step 34. Otherwise, go to step 35, that is, the UE performs step 35 when it is 3G.
  • Step 34 The GANC determines whether the UE supports the Dual Transfer Mode (DTM). If yes, go to Step 35. Otherwise, go to Step 36. The UE supports the DTM to indicate that there is a bearer in the PS domain. Otherwise, the bearer of the PS domain does not exist.
  • DTM Dual Transfer Mode
  • Step 35 The GANC sends the paging message to the UE through the second bearer, that is, the GANC is sent to the UTRAN entity through the SGSN, and is sent by the UTRAN entity to the UE.
  • the GANC sends a paging message through the third bearer of the LTE, for example, as shown by the dotted line in FIG. Step 31 has no timing constraint relationship with subsequent steps 32-36. It can be seen from the above process that when the ISR is not activated, and the UE moves from LTE to 2/3G, the paging message may be sent from the first bearer of the CS domain and the second bearer of the PS domain to the UE, or from the CS domain.
  • the first bearer and the third bearer in LTE are sent to the UE. That is, the GANC knows that the UE is at 2/3G. After receiving the paging from the MSC/VLR, it decides to forward the paging message to the 2/3G PS domain or forward the paging message to the LTE. Although there are three bearers (bearers in the CS domain, bearers in the PS domain, and bearers in the LTE), the GANC can only send paging messages to only two of the bearers by determining the type of the access network, which can save air interface resources. In this embodiment, by determining the type of the access network, a paging message can be sent on a suitable bearer instead of sending a paging message on all bearers, which can save resources.
  • FIG. 4 is a schematic flowchart of Embodiment 2 of a method for sending a paging message according to an access network type according to a second embodiment of the present invention.
  • This embodiment is directed to activating an ISR.
  • This embodiment includes: Steps 41-42: Corresponding to steps 31-32.
  • Step 43 The GANC determines if it is on a 2/3G network. If yes, go to step 44. Otherwise, if the UE is currently in the LTE network, go to step 45.
  • Step 44 Perform the processing flow in 2/3G. For details, refer to steps 33-36 in the embodiment shown in FIG. 3.
  • Step 45 The GANC sends the paging message to the UE by using the third bearer, that is, the GANC is sent to the UE through the PDN_GW and the S_GW.
  • the EUTRAN entity is delivered by the EUTRAN entity to the UE, for example, as shown by the dotted line in FIG.
  • the above ISR activation process is performed when the UE performs a joint routing area update/location area update (RAU/LAU) procedure or a separate location area update (LAU) procedure after entering the 2/3G area.
  • the ISR may not be activated in the joint RAU/LAU process or in the separate LAU process.
  • the activation of the ISR may depend on the operator policy and the like.
  • the UE may establish a signaling path with the 2/3G CS domain core network MSC/VLR.
  • the paging message of the core network MSC paging the UE is sent to the GERAN entity through the Iu-CS/A interface, and is sent by the GERAN entity to the UE;
  • the paging message of the core network MSC paging the UE is sent to the GANC through the Iu-CS/A interface, and the IP connection between the UE via the GANC is via the UTRAN entity.
  • the paging message is sent to the UE.
  • the signaling bearer of the CSoEPS in the LTE is not released in the embodiment of the present invention. Therefore, when a paging message needs to be delivered, there may be three paths: ) the first bearer shown, the second bearer and the third bearer shown in (2) above (the IP bearer of CSoEPS).
  • a paging message can be sent on a suitable bearer instead of sending a paging message on all bearers, which can save resources. The above is to transmit a paging message through two signaling bearers, or to transmit a paging message through three signaling bearers to improve reliability.
  • the network side may send a paging message to the UE from the CS domain and the PS domain at the same time, in order to prevent the UE from abnormally processing the paging message.
  • the UE needs to ignore the paging message received the second time.
  • FIG. 5 is a schematic flowchart of a method according to a third embodiment of the present invention, which is applied to the system in the first embodiment, and the processing on the UE side includes:
  • Step 51 The UE receives the paging message sent by one bearer.
  • Step 52 The UE determines whether the paging message sent by another bearer has been received, and if yes, performs step 53, otherwise, step 54 is performed.
  • Step 53 Ignore the paging message.
  • Step 54 Receive and process the paging message, and perform normal GAN-like CSoEPS processing. In this embodiment, by having a flow of ignoring a paging message, an abnormal collision caused by repeated paging can be avoided.
  • FIG. 6 is a structural diagram of a control plane protocol stack corresponding to a user equipment according to a third embodiment of the present invention. The embodiment of the present invention needs to maintain the bearer of the LTE even after the UE moves from the LTE to the 2/3G. To this end, the control plane of the UE is required.
  • the (Control Plane) protocol stack is appropriately added to enable the UE to support CSoEPS.
  • the new functional entities include "Access Mode Switch”, "GA Layer3 Protocols", “TCP/IP”, and “IPSec ESP".
  • the remaining functional entities are existing functional entities.
  • the existing functional entities are functional entities supporting E-UTRAN and UTRAN, and the new functional entities are used to support GAN-like based CSoEPS services.
  • ⁇ GA Layer3 Protocols ⁇ is Generic Access Resource Control (GA-RC) and Generic Access Circuit Switch Resources (GA-CSR);
  • GAN Iu mode ⁇ GA Layer3 Protocols” is GA-RC and Generic Access Radio Resource Control (GA-RRC).
  • GAN A/Gb mode and GAN Iu mode are two types of access. Interface mode between the network and the core network.
  • GA-RC is the control plane protocol
  • GA-CSR and GA-RRC are the user plane protocols.
  • the repeat negation capability that the UE has can also be implemented by the above-mentioned new entity.
  • the embodiments of the present invention are useful for operators to fully utilize the 2/3G circuit domain network to protect the operator's investment in the circuit domain, and to solve the frequent triggering of registration when the idle mode UE moves between LTE and UTRAN/GERAN.
  • the location is updated, thereby generating the problem that the corresponding signaling occupies a large amount of air interface radio resources.
  • it solves the GAN-like CSoPS signaling bearer processing problem, saves data and signaling; and can solve the GAN-like CSoPS and ISR coexistence problem.
  • FIG. 7 is a schematic structural diagram of a GANC according to a fourth embodiment of the present invention, which is applied to the system shown in the first embodiment, and includes a first receiving module 71 and a transmitting module 72.
  • the first receiving module 71 is configured to receive the paging message sent by the MSC/VLR, and the sending module 72 is connected to the first receiving module 71, and is configured to transmit from the existing available according to the pre-acquired wireless access network type information. Selecting one or more bearers in the bearer of the circuit domain signaling to send the paging message to the user equipment, where the existing bearer for transmitting circuit domain signaling includes a second signaling bearer and a third letter Order bearing.
  • the embodiment may further include an obtaining module, which is connected to the sending module 72, and is configured to obtain, from the message returned by the policy control and charging rule function entity PCRF, the current user equipment in the PCC process for performing signaling bearer negotiation.
  • the sending module 72 is specifically configured to: when the radio access network type is GERAN and support dual transmission.
  • the paging message is sent from a second signaling bearer of a packet domain; when the radio access network type is GERAN but does not support DTM,
  • the third signaling bearer of the E-UTRAN delivers the paging message.
  • the sending module 72 is specifically configured to: when the radio access network type is GERAN and support DTM, or when the radio access network type is UTRAN, the second signaling bearer from the packet domain Sending the paging message; when the radio access network type is GERAN but does not support the DTM, or the radio access network type is E-UTRAN, the third signaling bearer is sent from the E-UTRAN.
  • the paging message when the radio access network type is GERAN and support DTM, or when the radio access network type is UTRAN, the third signaling bearer is sent from the E-UTRAN.
  • FIG. 8 is a schematic structural diagram of a UE according to a fifth embodiment of the present invention.
  • the system is applied to the system shown in the first embodiment, and includes a second receiving module 81 and a processing module 82.
  • the second receiving module 81 is configured to receive a paging message that is sent by using a bearer.
  • the processing module 82 is connected to the second receiving module 81, and is configured to determine whether the paging message sent by another bearer is received.
  • the second receiving module 81 is specifically configured to receive a paging message sent by a packet domain of the GERAN or a packet domain of the UTRAN; or, specifically, for receiving a paging message sent by a circuit domain of the GERAN or a circuit domain of the UTRAN; Or, specifically, for receiving a paging message sent by the E-UTRAN; the UE may further include: a response module, connected to the processing module 82, configured to respond to the paging message from a circuit domain of the GERAN or the UTRAN.

Description

寻呼系统、 寻呼方法和设备
本申请要求于 2009年 1月 19日提交中国专利局、申请号为 200910077196. 3、发明 名称为 "寻呼系统、 寻呼方法和设备"的中国专利申请的优先权, 其全部内容通过引用 结合在本申请中。 技术领域 本发明涉及无线通信技术, 特别涉及一种寻呼系统、 寻呼方法和设备。 背景技术 为了提高系统性能, 第二代通信系统 /第三代通信系统(2/3G) 正在向长期演进系 统(Long Term Evolution, LTE)发展。 其中, 2G的无线接入网为全球移动通信系统无 线接入网 (Global System for Mobile communications/Enhanced Data rate for GSM Evolution Radio EDGE Radio Access Network, GERAN), 3G的无线接入网为通用地面 无线接入网 (Universal Terrestrial Radio Access Network, UTRAN)、 LTE的无线接 入网为演进的通用地面无线接入网 (Evolved Universal Terrestrial Radio Access Network, EUTRAN。 2/3G的核心网包括电路交换(Circuit Switched, CS)域和分组交 换域(Packet Switched, PS)域。 在 2/3G中语音业务通常是由 CS域提供的。 在 LTE 中可以通过部署 IP多媒体子系统(IP Multimedia Subsystem, IMS), 由頂 S提供语音 业务, 即 IP语音业务(Voice over IP, VoIP)。 但是由于运营及成本方面的考虑, 大 规模部署 B1S系统来实现语音业务是较为困难的,为此需要考虑重用 2/3G的 CS域来实 现语音业务。 目前一种方案是采用似通用接入网络 (Generic Access Network-like, GAN-like ) 架构, 在 GAN-like 架构中, 需要在现有 LTE 的系统架构演进 (System Architecture Evolution, SAE) 中增力口通用接入网络控制器 (Generic Access Network Controller, GANC),通过 GANC实现 LTE的语音业务,而无需部署 MS。在现有 GAN-like 架构中, 当用户设备(User Equipment, UE)驻留在 2/3G时, 需要建立 CS域的承载和 PS域的承载, 当 UE驻留在 LTE时, 需要建立 LTE中的承载。
发明人发现现有技术中 UE从 LTE移动到 2/3G, 然后 UE从 2/3G移动回 LTE, UE需 要发起 GANC发现过程, 并且重建传输 CS信令的承载, 这会引起大量信令流和数据流, 增加网络和 UE的负担。 发明内容
本发明实施例提供了一种寻呼系统、 寻呼方法和设备, 解决现有重建 LTE中的承载 弓 I起的大量信令流及数据流的问题。
本发明实施例提供了一种寻呼系统, 包括用于接收寻呼消息的用户设备 UE, 所述用 户设备在全球移动通信系统无线接入网 GERAN或通用地面无线接入网 UTRAN的电路域中 通过第一信令承载与核心网电路域的移动交换中心连接,用户设备在 GERAN或 UTRAN的分 组域中通过第二信令承载与核心网电路域的移动交换中心连接,用户设备在演进的通用 地面无线接入网 E-UTRAN中通过第三信令承载与核心网电路域的移动交换中心连接。
本发明实施例提供了一种寻呼方法, 包括:
接收移动交换中心发送的寻呼消息;
根据预先获取的用户设备当前所在的无线接入网的类型信息,从已有的可用于传送 电路域信令的承载中选择一个或多个承载下发所述寻呼消息给所述用户设备,所述已有 的可用于传送电路域信令的承载包括第二信令承载和第三信令承载; 其中, 所述第二信 令承载为连接核心网电路域的 MSC/VLR、 GANC, SGSN、 UTRAN和 UE的信令承载; 所述第三 信令承载为连接核心网电路域的 MSC/VLR、 GANC, PDN_GW、 S_GW、 E-UTRAN和 UE的信令承 载。
本发明实施例还提供了一种寻呼方法, 应用于上述的系统, 包括:
接收通过一个承载下发的寻呼消息;
判断是否接收过通过另一承载下发的所述寻呼消息,若已经接收过通过另一承载下 发的所述寻呼消息, 则忽略通过所述的一个承载下发的寻呼消息。
本发明实施例提供了一种 GANC, 包括:
第一接收模块, 用于接收移动交换中心发送的寻呼消息;
发送模块, 与所述第一接收模块连接, 用于根据预先获取的无线接入网类型信息, 从已有的可用于传送电路域信令的承载中选择一个或多个承载下发所述寻呼消息给所 述用户设备,所述已有的可用于传送电路域信令的承载包括第二信令承载和第三信令承 载。
本发明实施例提供了一种 UE, 应用于上述的系统, 包括:
第二接收模块, 用于接收通过一承载下发的寻呼消息; 处理模块, 与所述第二接收模块连接, 用于判断是否接收过通过另一承载下发的所 述寻呼消息, 若接收过通过另一承载下发的所述寻呼消息, 则忽略通过所述一承载下发 的寻呼消息。
由上述技术方案可知, 本发明实施例通过 UE在 LTE网络中通过第三承载与语音网络 连接, 即 UE在从 LTE移动到 2/3G时, UE仍然不释放 LTE中的承载, 使得 UE在重新回到 LTE 时, 无需重建 LTE的承载, 避免产生大量的信令流和数据流, 节省网络及 UE的资源。 附图说明 图 1为本发明第一实施例的寻呼系统的结构示意图;
图 2为本发明第二实施例的方法流程示意图;
图 3为本发明第二实施例中根据接入网类型下发寻呼消息的方法实施例一的流程示 意图;
图 4为本发明第二实施例中根据接入网类型下发寻呼消息的方法实施例二的流程示 意图;
图 5为本发明第三实施例的方法流程示意图;
图 6为本发明第三实施例对应的用户设备的控制面协议栈架构图;
图 7为本发明第四实施例的 GANC的结构示意图;
图 8为本发明第五实施例的 UE的结构示意图。 具体实施方式 下面通过附图和实施例, 对本发明的技术方案做进一步的详细描述。
GAN-like架构可以实现 CS语音在演进的 PS (Evolved PS, EPS)域上承载, 借用 GAN 架构从而重用 CS业务网来实现 LTE上的 IP语音业务(VoIP over LTE) , 不需要部署頂 S 网络; 同时可以借用单接收机頂 S和 CS之间的语音连续性(Single Radio Voice Call Continuity between IMS and CS, SR-VCC)切换机制增强 GAN的切换机制, 同时使用策 略和计费控制 (Policy and Charging Control, PCC)来增强 GANC控制 VoIP承载。 在 LTE/SAE部署初期, 典型的覆盖情况是传统的 2/3G系统保持大面积覆盖, 而 LTE/SAE系统作为补充进行点状覆盖。这种情况下, 用户可能会比较频繁地在 LTE/SAE系 统与 2/3G系统间移动。 当用户发生跨系统的移动时, 按照传统 2/3G系统的处理方式, 处 于空闲状态的 UE在进入新的系统时需要重新执行位置更新。 因此, 当用户频繁跨越不同 系统时, 必然引起频繁发生的系统重选并增加大量的位置更新信令。空闲模式信令压缩 ( Idle-mode Signalling Reduction, ISR)方法的目的是考虑上述用户在不同系统(尤 其是 2/3G系统与 LTE/SAE系统) 间频繁移动时, 缩减注册 /更新信令的数量。 ISR方案的主要思想是, 将相邻的 2/3G的路由区 (Routing Area, RA)和 LTE/SAE的 跟踪区 (Tracking Area, TA) 设定为等效位置区, 当 UE进入一个接入系统时, 按照普 通的注册 /更新程序进行注册, 网络为 UE分配临时标识和位置区域标识; 当 UE在 ISR激活 情况下进入另一个接入系统时, 发起位置更新过程, 网络分配新系统的临时标识和位置 域标识。此时, 两个系统为 UE提供服务的核心网节点都在 HSS登记, 同时为 UE提供服务, 而当 UE再次在这两个系统间来回移动时, 因为有关联关系的存在, 不需再次发起注册 / 更新过程, 由此达到减少路由更新信令、 节省空口资源。 当关联建立后, 对于空闲态的 UE有下行数据到达时, 也将在两个系统内同时寻呼。 网络将向响应寻呼消息的那个接入 系统发送下行数据。 例如, UE先后分别接入了 LTE/SAE系统和 2/3G系统; ISR激活之后, MME和 SGSN都分别到 HSS注册, UE分别获得由 2/3G系统的 SGSN分配的分组网络临时移动用 户标识 (Packet-Temporary Mobile Subscriber Identity, P-TMSI )或路由区标识 (Routing Area Identity, RAI ) , 和由 LTE/SAE系统的 MME分配的全球唯一临时标识 (Globally unique temporary identity, GUTI )或跟踪区标识 (Tracking Area Identity, TAD 。 当 UE在注册的 LTE/SAE和 2/3G系统间移动时, 根据 P-TMSI/RAI和 GUTI/TAI的关联关系, 不需要发起 TA更新或 RA更新过程, 不需再次发起注册 /更新过程, 由此达到减少路由更新信令、 节省空口资源。 在 GAN-like CSoEPS架构下, 当 UE驻扎在 LTE时, 相关 CS信令需要传输在 LTE承载上。 当 UE从 LTE移动到 2/3G, UE主动释放 LTE承载。 当后续 UE从 2/3G移动回 LTE, UE需要重新 发起 GANC发现过程, 并且重建传输 CS信令的承载, 并通过该信令承载到 MSC/VLR进行注 册。 当 UE在系统间频繁移动时, 这样的做法会增加网络和 UE的负担, 尤其对空口资源造 成浪费。如果网络引入 ISR机制, 则要求空闲模式的 UE在 LTE和 UTRAN/GERAN之间移动时, 不应该频繁触发的注册 /位置更新, 否则产生的相应信令会大量占用空口无线资源。 但 目前应用上述 GAN-like CSoEPS架构下的承载建立及删除方法, 由于当 UE从 LTE移动到 2/3G时删除 LTE的承载, 之后 UE在重回 LTE后又需要重建 LTE的承载, 则重建 LTE的承载会 不可避免引起大量信令流和数据流, 从而导致 ISR失效, 或者说根本没有办法引入 ISR机 制让 ISR和 CSoEPS方案共存。为此本发明实施例要解决 CSoEPS和 ISR共存的问题, 以减少 空口信令对无线资源的大量占用。
为此, 本发明实施例提供一种寻呼系统, 包括用于接收寻呼消息的 UE, UE在 GERAN 或 UTRAN的 CS域中通过第一信令承载与核心网电路域的 MSC/VLR连接, UE在 GERAN或 UTRAN 的 PS域中通过第二信令承载与核心网电路域的 MSC/VLR连接, UE在 E-UTRAN中通过第三信 令承载与核心网电路域的 MSC/VLR连接。 图 1为本发明第一实施例的寻呼系统的结构示意图, 包括 UE101、 位于 E-UTRAN中的 演进基站 ( eNodeB) 102、 移动管理实体 (Mobile Management Entity, MME) 103、 服 务网关( Serving SAE Gateway, S- GW) 104、 分组数据网网关 (Packet Data Network SAE Gateway, PDN-GW) 105、服务通用无线分组业务(General Packet Radio Service, GPRS) 支持节点 (Serving GPRS Support Node, SGSN) 106、 GANC107、 策略控制与计费规则 功能实体 (Policy Control and Charging Rules Function, PCRF) 108、 移动性管理 的移动交换中心 /拜访位置寄存器 (Mobile Switching Center/Visitor Location Register, MSC/VLR) 109、 基站收发信台 /基站 (Base Transceiver Station/NodeB, BTS/NodeB) 110、基站控制器 /接入网控制器(Base Station Controller/Radio Network Controller, BSC/RNC) 111及 IP网 112和语音网 113。 UE101通过 LTE-Uu接口与 eNodeB102 连接, eNodeB102通过 Sl-MME接口与 MME103连接, eNodeB102通过 S1-U接口与 S-GW104连 接, MME103通过 S11接口与 S-GW104连接, MME103通过 S3接口与 SGSN106连接, MME103通 过 Sv接口连接 GANC107, S-GW104通过 S5接口与 PDN-GW105连接, S-GW104通过 S4接口与 SGSN106连接, PDN-GW105通过 S7接口与 PCRF108连接, PDN-GW105通过 SGi接口与 GANC107 连接, PDN-GW105通过 SGi接口与 IP网 112 (例如頂 S)连接, SGSN106通过 Iu-PS/Gb连接 BSC/RNC111, BSC/RNC111通过 Iu-CS/A接口连接 MSC/VLR109, GANC107通过 Iu-CS/A接 口连接 MSC/VLR109。 S-GW104与 PDN-GW105可能处于同一个物理节点也可能处于不同物理 节点。 MME103和 S-GW104也可能处于同一个物理节点或分离的物理节点。 当上面的逻辑 实体处于同一个物理节点, 则其之间的接口信令转为内部节点消息。 非接入层 (Non Access Stratum, NAS)信令通过 EPS承载在 UE和 GANC之间传递, 再由 GANC模拟 BSC/RNC 发送给 MSC/VLR。 当 UE移动到 LTE和 GERAN/UTRAN的边界处时, MME通过 Sv接口指示 GANC发 起 Intra/Inter-MSC的切换, 将 CS业务切换到 GERAN/UTRAN CS网络。 GANC角色类似于 BSS/RNS, 其主要功能是提供 UE与 MSC间的信令通道, UE通过 IP接入网连接到 GANC, GANC 负责用户面与控制面的数据交互。 GANC也包含有 MGW功能, 转换基于 2G CS的语音编码和 基于 IP的语音编码。 从实施的角度, 该逻辑实体可以融于 MSC中, 也可以单独存在, 甚 至可以融于分组接入网中。 当融于 MSC中时, 传统 MSC和 GANC—起构成了一种增强的 MSC。 GANC和 MSC之间的接口可以是外部接口或者内部接口 (如果将 GANC融于 MSC, 则该接入是 一个内部接口) , 该接口形式上可以是 Iu-CS接口, 或者 A接口, 或者其它形式的接口。 MSC与 GANC的连接关系可以是一对一、一对多、 多对一或多对多。 GANC与分组接入网 SAE 之间的接口: GANC和 MME之间是 Sv接口, GANC和 PDN-GW之间是 SGi接口。 图 1所示的网元是 GAN-l ike架构所具有的网元, 与 GAN-l ike架构不同的是, 本发明 实施例的系统中包括三个信令承载。 具体地, 所述第一信令承载为连接核心网电路域的 MSC/VLR、 GERAN和 UE的信令承载 (例如图 1的短线所示);所述第二信令承载为连接核心网电路域的 MSC/VLR、GAN (:、 SGSN、 UTRAN和 UE的信令承载(例如图 1的点划线所示) ; 所述第三信令承载为连接核心网电路 域的 MSC/VLR、 GANC, PDN-GW, S_GW、 E-UTRAN和 UE的信令承载(例如图 1的点线所示) 。 而在现有 GAN-l ike架构中, 当 UE从 LTE移动到 2/3G时, 将会删除 LTE的承载即将删除上述 第三信令承载。 本发明实施例即使在 UE从 LTE移动到 2/3G时, 仍会保留 LTE的第三信令承 载,具体的可以通过不执行现有后续的删除第三信令承载的流程实现对第三信令承载的 保留。 具体保留时间可以由 GANC根据实际情况来确定。 本实施例通过保持 LTE承载, 即在 UE从 LTE移动到 2/3G时, 传输 CS信令的 LTE承载始 终保持, 可以避免当 UE重新移动回 LTE时重建 LTE承载耗费的大量信令流和数据流问题, 节省无线资源。 在上述三个承载均存在的情况下,需要考虑如何下发语音网的寻呼消息及 UE对寻呼 消息的处理方式。 图 2为本发明第二实施例的方法流程示意图, 包括: 步骤 21 : GANC接收 MSC/VLR发送的寻呼消息。 步骤 22: GANC根据预先获取的无线接入网类型信息, 从已有的可用于传送电路域信 令的承载中选择一个或多个承载下发寻呼消息,所述已有的可用于传送电路域信令的承 载包括第二信令承载和第三信令承载。 本实施例通过保持 LTE承载, 可以在 UE从 2/3G重移动回 LTE时, 避免重建 LTE承载引 起的大量数据流及信令流的问题。 为了保持上述的第三信令承载, 在上述步骤之前还可以包括当 UE从 E-UTRAN移动进 入到 GERAN或 UTRAN覆盖区域时, 可用于传送电路域信令的、 基于 E-UTRAN建立的第三信 令承载保持连接状态。
为了有效节省信令,当 UE在 GERAN或 UTRAN覆盖区域内部从一小区移动进入到另一小 区时, 如果 UE所在的位置区 LA发生改变, 则释放可用于传送电路域信令的、 基于 GERAN 或 UTRAN的分组域建立的第二信令承载。 下面对各步骤进行较为详细的说明: 在步骤 22之前还可以包括 GANC获取上述的无线接入网类型信息: GANC可以在进行信 令承载协商的 PCC过程中, 由 PCRF将 UE当前所在的接入网类型 (2G中的 GERAN、 3G中的 UTRAN或 LTE中 E-UTRAN)通知给 GANC, 或者, 还可以是 UE通过 UP, 或 Zl接口直接向 GANC 上报其当前所在的接入网类型, 或者, 还可以是 UE通过 CS域上报接入网类型等。 关于步骤 22: 图 3为本发明第二实施例中根据接入网类型下发寻呼消息的方法实施例一的流程示 意图, 本实施例针对未激活 ISR的情况, 在 UE从 LTE移动到 2/3G时。 本实施例包括: 步骤 31 : MSC/VLR将语音网的寻呼消息通过第一承载下发给 UE, 即通过 Iu_CS/A接口 下发给 GERAN实体, 由 GERAN实体下发给 UE, 例如, 参见图 1的短线所示。 步骤 32: MSC/VLR将语音网的寻呼消息通过 Iu-CS/A接口发送给 GANC。 步骤 33: GANC接收到寻呼消息后根据获取的接入网类型确定 UE当前是否在 2G中, 是 则执行步骤 34, 否则执行步骤 35, 即 UE在 3G时执行步骤 35。 步骤 34: GANC判断 UE是否支持双传输模式 (Dual Transfer Mode, DTM) , 若是, 则执行步骤 35, 否则执行步骤 36。 UE支持 DTM表明存在 PS域的承载, 否则, PS域的承载 不存在。
步骤 35: GANC通过第二承载将寻呼消息下发给 UE, 即 GANC通过 SGSN发送给 UTRAN实 体, 由 UTRAN实体下发给 UE, 例如, 参见图 1的点划线所示。 步骤 36: GANC通过 LTE的第三承载下发寻呼消息, 例如, 参见图 1的点线所示。 步骤 31与后续的步骤 32-36无时序限制关系。 从上述流程可以看出, 当未激活 ISR, 并且 UE从 LTE移动到 2/3G时, 寻呼消息可能从 CS域的第一承载及 PS域的第二承载发送给 UE, 或者从 CS域的第一承载及 LTE中的第三承 载发送给 UE。即 GANC得知 UE处在 2/3G,当接收到来自 MSC/VLR的寻呼后,则决定向 2/3G PS 域转发寻呼消息或向 LTE转发寻呼消息。 虽然存在 3个承载 (CS域的承载、 PS域的承载、 LTE的承载) , 但 GANC通过判断接入网类型可以只向其中的两个承载下发寻呼消息, 可 以节省空口资源。 本实施例通过确定接入网类型, 可以在合适的承载上发送寻呼消息, 而不是在所有 的承载上发送寻呼消息, 可以节省资源。 图 4为本发明第二实施例中根据接入网类型下发寻呼消息的方法实施例二的流程示 意图, 本实施例针对激活 ISR的情况。 本实施例包括: 步骤 41-42: 与步骤 31-32对应相同。 步骤 43: GANC判断是否在 2/3G网络。 若是, 执行步骤 44, 否则, 即 UE当前在 LTE网 络, 则执行步骤 45。 步骤 44: 进行 2/3G中的处理流程, 具体可参见图 3所示的实施例中的步骤 33-36。 步骤 45: GANC通过第三承载将寻呼消息下发给 UE, 即 GANC通过 PDN_GW、 S_GW发送给
EUTRAN实体, 由 EUTRAN实体下发给 UE, 例如, 参见图 1的点线所示。 上述 ISR激活过程是在 UE进入 2/3G区域后执行联合的路由区更新 /位置区更新 (RAU/LAU) 过程或者单独的位置区更新 (LAU) 过程时完成的。 联合的 RAU/LAU过程或 单独的 LAU过程中也可能不激活 ISR, 是否激活 ISR可以取决于运营商策略等。 当 UE在进 入 2/3G区域后完成上述位置更新过程后,无论是否激活 ISR,此时 UE都可能建立和 2/3G CS 域核心网 MSC/VLR的信令路径。 由以下可能情况: (1 ) 如果 UE驻扎在 2/3G CS区域, 则 核心网 MSC寻呼 UE的寻呼消息通过 Iu-CS/A接口下发给 GERAN实体, 由 GERAN实体下发给 UE; ( 2 ) 如果 UE驻扎在 2/3G PS区域, 则核心网 MSC寻呼 UE的寻呼消息通过 Iu-CS/A接口 下发给 GANC, 并经由 GANC到 UE之间的 IP连接经由 UTRAN实体将寻呼消息下发给 UE。 可见, 当 UE从 LTE移到 2/3G区域后, 由于本发明实施例要求 LTE中 CSoEPS的信令承载不释放, 因 此实际上当一个寻呼消息需要下发时, 可能存在三条路径: 上述(1 )所示的第一承载、 上述 (2 ) 所示的第二承载和第三承载 (CSoEPS的 IP承载) 。 本实施例通过确定接入网类型, 可以在合适的承载上发送寻呼消息, 而不是在所有 的承载上发送寻呼消息, 可以节省资源。 上述是通过两个信令承载传输寻呼消息, 也可 以是通过三个信令承载传输寻呼消息以提高可靠性。 上述对网络的处理流程进行了说明, 从上述可以看出, 当 UE在 2/3G时, 网络侧可能 从 CS域和 PS域同时向 UE发送寻呼消息, 为了避免 UE处理寻呼消息出现异常, UE需要忽略 第二次接收到的寻呼消息。即一旦 UE接收通过 GERAN的分组域或 UTRAN的分组域发送的寻 呼消息; 或者, 接收通过 GERAN的电路域或 UTRAN的电路域发送的寻呼消息; 或者, 接收 通过 E-UTRAN发送的寻呼消息, 此时 UE只从 CS域去响应寻呼(类似 CSFB过程) 。 之后, 如果 UE重复收到另外一个寻呼请求时, UE不再处理此寻呼请求。 即 UE具有重复寻呼忽略 能力。 图 5为本发明第三实施例的方法流程示意图, 应用于第一实施例的系统, 针对 UE侧 的处理, 包括:
步骤 51 : UE接收通过一个承载发送的寻呼消息。 步骤 52: UE判断是否已经接收过通过另一个承载发送的该寻呼消息, 若是, 执行步 骤 53, 否则, 执行步骤 54。 步骤 53: 忽略该寻呼消息。 步骤 54: 接收处理该寻呼消息, 进行正常 GAN-like CSoEPS处理。 本实施例通过具有忽略寻呼消息的流程, 可以避免重复寻呼引起的异常冲突。 图 6为本发明第三实施例对应的用户设备的控制面协议栈架构图。 由于本发明实施 例即使 UE从 LTE移动到 2/3G后, 仍然需要保持 LTE的承载, 为此, 需要对 UE的控制面
(Control Plane)协议栈进行适当的增加, 以使 UE具有支持 CSoEPS的能力。 其中新增的 功能实体包括 "Access Mode Switch" 、 "GA Layer3 Protocols " "TCP/IP" " IPSec ESP", 其余的功能实体为现有功能实体。 现有功能实体为支持 E-UTRAN和 UTRAN的功能 实体,新增的功能实体用于支持基于 GAN-like的 CSoEPS业务。其中,对于 GAN A/Gb模式, 〃GA Layer3 Protocols〃为通用接入资源控制 (Generic Access Resource Control, GA-RC)和通用接入电路交换资源(Generic Access Circuit Switch Resources, GA-CSR); 对于 GAN Iu模式, 〃GA Layer3 Protocols"为 GA-RC和通用接入无线资源控制 (Generic Access Radio Resource Control, GA-RRC) 。 GAN A/Gb模式和 GAN Iu模式是两种接入 网和核心网之间的接口模式。 GA-RC为控制面协议, GA-CSR和 GA-RRC为用户面协议。 UE 具有的重复忽略能力也可以通过上述新增的实体实现。
本发明实施例有利于运营商在充分利用 2/3G电路域网络,从而保护运营商在电路域 的投资的前提下, 解决因空闲模式 UE在 LTE和 UTRAN/GERAN之间移动时频繁触发注册 /位 置更新, 从而产生相应信令大量占用空口无线资源的问题。 同时, 解决 GAN-like CSoPS 信令承载处理问题, 节省数据和信令; 并且, 可以解决 GAN-like CSoPS和 ISR共存问题。
本发明实施例同样适用于用户在 CDMA2000 lxRTT电路域核心网 lxRTT MSC/VLR进行 GAN-like CSoEPS提供语音时, 即类似 LTE-lxRTT CSoPS。 同样, 本发明实施例也适用于 IP-CAN网络为 HSPA、 WiMAX、 3GPP2、 UMB等情况。 图 7为本发明第四实施例的 GANC的结构示意图, 应用于第一实施例所示的系统, 包 括第一接收模块 71和发送模块 72。 第一接收模块 71用于接收 MSC/VLR发送的寻呼消息; 发送模块 72与所述第一接收模块 71连接, 用于根据预先获取的无线接入网类型信息, 从 已有的可用于传送电路域信令的承载中选择一个或多个承载下发所述寻呼消息给所述 用户设备, 所述已有的可用于传送电路域信令的承载包括第二信令承载和第三信令承 载。
本实施例还可以进一步包括获取模块, 与所述发送模块 72连接, 用于在进行信令承 载协商的 PCC过程中, 从策略控制与计费规则功能实体 PCRF返回的消息中获取到用户设 备当前所在的无线接入网类型信息; 或者, 用于接收用户设备由 UP' 或 Z1接口上报的用 户设备当前所在的无线接入网类型信息; 或者, 用于接收用户设备由电路域上报的用户 设备当前所在的无线接入网类型信息。 本实施例中, 当 UE从 E-UTRAN移动进入到 GERAN或 UTRAN且未激活空闲模式信令压缩 ISR时,所述发送模块 72具体用于当所述无线接入网类型为 GERAN且支持双传输模式 DTM, 或者, 所述无线接入网类型为 UTRAN时, 从分组域的第二信令承载下发所述寻呼消息; 当所述无线接入网类型为 GERAN但不支持 DTM时, 从 E-UTRAN的第三信令承载下发所述寻 呼消息。 当激活 ISR时, 所述发送模块 72具体用于当所述无线接入网类型为 GERAN且支持 DTM, 或者, 所述无线接入网类型为 UTRAN时, 从分组域的第二信令承载下发所述寻呼消 息;当所述无线接入网类型为 GERAN但不支持 DTM,或者,所述无线接入网类型为 E-UTRAN 时, 从 E-UTRAN中的第三信令承载下发所述寻呼消息。 实施例通过保持 LTE承载, 可以在 UE从 2/3G重移动回 LTE时, 避免重建 LTE承载引起 的大量数据流及信令流的问题。 图 8为本发明第五实施例的 UE的结构示意图, 应用于第一实施例所示的系统, 包括 第二接收模块 81和处理模块 82。 第二接收模块 81用于接收通过一承载下发的寻呼消息; 处理模块 82与所述第二接收模块 81连接,用于判断是否接收过通过另一承载下发的所述 寻呼消息, 若已经接收过通过另一承载下发的所述寻呼消息, 则忽略通过所述一承载下 发的寻呼消息。 具体地,第二接收模块 81具体用于接收通过 GERAN的分组域或 UTRAN的分组域发送的 寻呼消息; 或者, 具体用于接收通过 GERAN的电路域或 UTRAN的电路域发送的寻呼消息; 或者, 具体用于接收通过 E-UTRAN发送的寻呼消息; 该 UE还可以进一步包括: 响应模块, 与所述处理模块 82连接, 用于从 GERAN或 UTRAN的电路域响应所述寻呼消息。 本实施例通过具有忽略寻呼消息的流程, 可以避免重复寻呼引起的异常冲突。 本领域普通技术人员可以理解:实现上述方法实施例的全部或部分步骤可以通过程 序指令相关的硬件来完成, 前述的程序可以存储于一计算机可读取存储介质中, 该程序 在执行时, 执行包括上述方法实施例的步骤; 而前述的存储介质包括: R0M、 RAM, 磁碟 或者光盘等各种可以存储程序代码的介质。 最后应说明的是: 以上实施例仅用以说明本发明的技术方案而非对其进行限制, 尽 管参照较佳实施例对本发明进行了详细的说明, 本领域的普通技术人员应当理解: 其依 然可以对本发明的技术方案进行修改或者等同替换,而这些修改或者等同替换亦不能使 修改后的技术方案脱离本发明技术方案的精神和范围。

Claims

权利要求
1、 一种寻呼系统, 其特征在于, 包括用于接收寻呼消息的用户设备 UE, 所述用户 设备在全球移动通信系统无线接入网 GERAN或通用地面无线接入网 UTRAN的电路域中通 过第一信令承载与核心网电路域的移动交换中心连接,用户设备在 GERAN或 UTRAN的分组 域中通过第二信令承载与核心网电路域的移动交换中心连接,用户设备在演进的通用地 面无线接入网 E-UTRAN中通过第三信令承载与核心网电路域的移动交换中心连接。
2、根据权利要求 1所述的系统, 其特征在于, 所述第一信令承载为连接核心网电路 域的移动交换中心、 GERAN和 UE的信令承载; 所述第二信令承载为连接核心网电路域的 移动交换中心、通用接入网络控制器 GAN (:、服务通用无线分组业务支持节点 SGSN、 UTRAN 和 UE的信令承载; 所述第三信令承载为连接核心网电路域的移动交换中心、 GAN (:、分组 数据网网关 PDN-GW、 服务网关 S_GW、 E-UTRAN和 UE的信令承载。
3、 一种寻呼方法, 其特征在于, 包括:
接收移动交换中心发送的寻呼消息;
根据预先获取的用户设备当前所在的无线接入网的类型信息,从已有的可用于传送 电路域信令的承载中选择一个或多个承载下发所述寻呼消息给所述用户设备,所述已有 的可用于传送电路域信令的承载包括第二信令承载和第三信令承载; 其中, 所述第二信 令承载为连接核心网电路域的 MSC/VLR、 GANC, SGSN、 UTRAN和 UE的信令承载; 所述第三 信令承载为连接核心网电路域的 MSC/VLR、 GANC, PDN_GW、 S_GW、 E-UTRAN和 UE的信令承 载。
4、 根据权利要求 3所述的方法, 其特征在于, 还包括:
在进行信令承载协商的策略和计费控制 PCC过程中, 从策略控制与计费规则功能实 体 PCRF返回的消息中获取到所述用户设备当前所在的无线接入网的类型信息; 或者, 接收所述用户设备由 UP '或 Z1接口上报的所述用户设备当前所在的无线接入网类型 信息; 或者,
接收所述用户设备由电路域上报的所述用户设备当前所在的无线接入网类型信息。
5、根据权利要求 3或 4所述的方法, 其特征在于, 当所述用户设备从 E-UTRAN移动进 入到 GERAN或 UTRAN且未激活空闲模式信令压缩 ISR时,
所述根据预先获取的用户设备当前所在的无线接入网的类型信息,从已有的可用于 传送电路域信令的承载中选择一个或多个承载下发所述寻呼消息, 包括: 若所述无线接入网类型为 GERAN且支持双传输模式 DTM, 或者, 所述无线接入网类型 为 UTRAN, 则从分组域的所述第二信令承载下发所述寻呼消息;
若所述无线接入网类型为 GERAN但不支持 DTM, 则从 E-UTRAN的所述第三信令承载下 发所述寻呼消息。
6、根据权利要求 3或 4所述的方法, 其特征在于, 当所述用户设备从 E-UTRAN移动进 入到 GERAN或 UTRAN且激活 ISR时,
所述根据预先获取的用户设备当前所在的无线接入网的类型信息,从已有的可用于 传送电路域信令的承载中选择一个或多个承载下发所述寻呼消息, 包括:
若所述无线接入网类型为 GERAN且支持 DTM, 或者, 所述无线接入网类型为 UTRAN, 则从分组域的所述第二信令承载下发所述寻呼消息;
若所述无线接入网类型为 GERAN但不支持 DTM, 或者, 所述无线接入网类型为 E-UTRAN, 则从 E-UTRAN中的所述第三信令承载下发所述寻呼消息。
7、 根据权利要求 3所述的方法, 其特征在于, 还包括:
当所述用户设备从 E-UTRAN移动进入到 GERAN或 UTRAN覆盖区域时, 可用于传送电路 域信令的、 基于 E-UTRAN建立的第三信令承载保持连接状态;
当 UE在 GERAN或 UTRAN覆盖区域内部从一小区移动进入到另一小区时,如果 UE所在的 位置区 LA发生改变, 则释放可用于传送电路域信令的、基于 GERAN或 UTRAN的分组域建立 的第二信令承载。
8、 一种寻呼方法, 应用于权利要求 1所述的系统, 其特征在于, 包括:
接收通过一个承载下发的寻呼消息;
判断是否接收过通过另一承载下发的所述寻呼消息,若已经接收过通过另一承载下 发的所述寻呼消息, 则忽略通过所述的一个承载下发的寻呼消息。
9、根据权利要求 8所述的方法, 其特征在于, 接收通过一个承载下发的寻呼消息包 括:
接收通过 GERAN的分组域或 UTRAN的分组域发送的寻呼消息; 或者,
接收通过 GERAN的电路域或 UTRAN的电路域发送的寻呼消息; 或者,
接收通过 E-UTRAN发送的寻呼消息;
该方法还包括: 从 GERAN或 UTRAN的电路域响应所述寻呼消息。
10、 一种 GANC, 其特征在于, 包括:
第一接收模块, 用于接收移动交换中心发送的寻呼消息; 发送模块, 与所述第一接收模块连接, 用于根据预先获取的无线接入网类型信息, 从已有的可用于传送电路域信令的承载中选择一个或多个承载下发所述寻呼消息给所 述用户设备,所述已有的可用于传送电路域信令的承载包括第二信令承载和第三信令承 载。
11、 根据权利要求 10所述的 GANC, 其特征在于, 还包括:
获取模块, 与所述发送模块连接, 用于在进行信令承载协商的 PCC过程中, 从策略 控制与计费规则功能实体 PCRF返回的消息中获取到用户设备当前所在的无线接入网类 型信息; 或者, 用于接收用户设备由 UP' 或 Z1接口上报的用户设备当前所在的无线接入 网类型信息; 或者, 用于接收用户设备由电路域上报的用户设备当前所在的无线接入网 类型信息。
12、根据权利要求 10所述的 GANC, 其特征在于, 当 UE从 E-UTRAN移动进入到 GERAN或 UTRAN且未激活空闲模式信令压缩 ISR时,所述发送模块具体用于当所述无线接入网类型 为 GERAN且支持双传输模式 DTM, 或者, 所述无线接入网类型为 UTRAN时, 从分组域的第 二信令承载下发所述寻呼消息; 当所述无线接入网类型为 GERAN但不支持 DTM时, 从 E-UTRAN的第三信令承载下发所述寻呼消息。
13、 根据权利要求 10所述的 GANC, 其特征在于, 当激活 ISR时, 所述发送模块具体 用于当所述无线接入网类型为 GERAN且支持 DTM, 或者, 所述无线接入网类型为 UTRAN时, 从分组域的第二信令承载下发所述寻呼消息; 当所述无线接入网类型为 GERAN但不支持 DTM, 或者, 所述无线接入网类型为 E-UTRAN时, 从 E-UTRAN中的第三信令承载下发所述 寻呼消息。
14、 一种 UE, 应用于权利要求 1所述的系统, 其特征在于, 包括:
第二接收模块, 用于接收通过一个承载下发的寻呼消息;
处理模块, 与所述第二接收模块连接, 用于判断是否接收过通过另一承载下发的所 述寻呼消息, 若已经接收过通过另一承载下发的所述寻呼消息, 则忽略通过所述的一个 承载下发的寻呼消息。
15、 根据权利要求 14所述的 UE, 其特征在于,
所述第二接收模块具体用于接收通过 GERAN的分组域或 UTRAN的分组域发送的寻呼 消息;或者,具体用于接收通过 GERAN的电路域或 UTRAN的电路域发送的寻呼消息;或者, 具体用于接收通过 E-UTRAN发送的寻呼消息; 所述用户设备还包括: 响应模块, 与所述处理模块连接, 用于从 GERAN或 UTRAN的电 路域响应所述寻呼消息。
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