WO2011158772A1 - 移動通信方法及び呼セッション制御サーバ装置 - Google Patents
移動通信方法及び呼セッション制御サーバ装置 Download PDFInfo
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- WO2011158772A1 WO2011158772A1 PCT/JP2011/063450 JP2011063450W WO2011158772A1 WO 2011158772 A1 WO2011158772 A1 WO 2011158772A1 JP 2011063450 W JP2011063450 W JP 2011063450W WO 2011158772 A1 WO2011158772 A1 WO 2011158772A1
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- mobile station
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W60/00—Affiliation to network, e.g. registration; Terminating affiliation with the network, e.g. de-registration
- H04W60/04—Affiliation to network, e.g. registration; Terminating affiliation with the network, e.g. de-registration using triggered events
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
- H04L65/10—Architectures or entities
- H04L65/1016—IP multimedia subsystem [IMS]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W76/00—Connection management
- H04W76/10—Connection setup
- H04W76/18—Management of setup rejection or failure
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W68/00—User notification, e.g. alerting and paging, for incoming communication, change of service or the like
Definitions
- the present invention relates to a mobile communication method and a call session control server device.
- 3GPP stipulates a method for performing an incoming call process for a UE (User Equipment) via IMS (IP Multimedia Subsystem).
- the MME that has been temporarily stopped due to a failure or the like has been resumed while a bearer for the UE is set between the S-GW (Serving Gateway) and the P-GW (Packet Data Network Gateway). Later, if there is an incoming call to an idle UE whose registration with IMS is complete, in step S5001, the P / S-CSCF (Proxy / Serving-Call Session Control Function) In step S5002, the P-GW transmits the packet to the S-GW. It is assumed that such a packet includes “INVITE” addressed to the UE.
- S-GW Serving Gateway
- P-GW Packet Data Network Gateway
- step S5003 the S-GW transmits "Downlink Data Notification" to the MME.
- step S5004 since the MME has deleted the context information related to the UE by restarting, the MME transmits “Downlink Data Notification Ack” notifying the error to the S-GW.
- step S5005 upon receiving the “Downlink Data Notification Ack”, the S-GW releases the above-described bearer for UE.
- step S5006 the P / S-CSCF retransmits the packet addressed to the UE to the P-GW, and in step S5007, the P-GW retransmits the packet to the S-GW.
- step S5008 the packet is discarded, and in step S5009, “GTP-U Error Indication” is transmitted to the P-GW.
- step S5010 when the P-GW receives the “GTP-U Error Indication”, the P-GW releases the above-described bearer for UE.
- step S5011 the P / S-CSCF retransmits the packet addressed to the UE to the P-GW.
- step S5012 Since the P-GW has released the above-mentioned bearer for UE, the packet is discarded in step S5012.
- step S5013 when the P-GW notifies the PCRF (Policy and Charger Rule Function) that the bearer for the UE has been released, between the PCRF and the P / S-CSCF, Release the IMS Registration of the UE.
- PCRF Policy and Charger Rule Function
- the present invention has been made in view of the above-described problems, and after the MME that has been temporarily stopped due to a failure or the like is resumed, the recovery process is automatically performed when there is an incoming call addressed to the UE via the IMS. It is an object of the present invention to provide a mobile communication method and a call session control server apparatus that can connect a call by a call request signal transmitted by a calling user (that is, does not cause a call loss).
- a first feature of the present invention is a mobile communication method in which a mobility management node restarts in a state where a bearer for a mobile station is set between a serving gateway device and a packet data network gateway device A call session control server device transmitting an incoming signal addressed to the mobile station to the serving gateway device via the packet data network gateway device; and the serving gateway device includes the packet data network A step of notifying the call session control server device via the gateway device that the mobility management node has resumed; a step of the call session control server device holding an incoming signal addressed to the mobile station; After the mobile station is re-registered, the call set ® emission control server, via the packet data network gateway device, to the serving gateway apparatus, and summarized in that a step of transmitting the incoming signal of the mobile stations that are pending.
- a second feature of the present invention is a call session control server device, in which a mobility management node is resumed in a state where a bearer for a mobile station is set between a serving gateway device and a packet data network gateway device. Later, when an incoming signal addressed to the mobile station is received, the incoming signal addressed to the mobile station is transmitted to the serving gateway device via the packet data network gateway device.
- the serving gateway device is notified that the mobility management node has been resumed, the serving gateway device is configured to hold the incoming signal addressed to the mobile station, and after the mobile station is registered again, Via the packet data network gateway device to the serving gateway device It is summarized as being configured to transmit the incoming signal addressed to the mobile station that are pending.
- a recovery process can be automatically performed when there is an incoming call to the UE via the IMS. It is possible to provide a mobile communication method and a call session control server device capable of connecting a call (that is, not causing a call loss) by a call request signal transmitted by a calling user.
- FIG. 1 is an overall configuration diagram of a mobile communication system according to a first embodiment of the present invention.
- FIG. 3 is a sequence diagram illustrating an operation of the mobile communication system according to the first embodiment of the present invention. It is a sequence diagram explaining operation
- the mobile communication system includes an S-CSCF (Serving-Call Session Control Function), a P-CSCF (Proxy-Call Session Control Function) # 1, and a P-CSCF # 2.
- S-CSCF Server-Call Session Control Function
- P-CSCF Proxy-Call Session Control Function
- P-CSCF # 2 PCRF # 1, PCRF # 2, P-GW # 1, P-GW # 2, S-GW # 1, S-GW # 2, MME (Mobility Management Entity) # 1, MME # 2, eNB # 1, eNB # 2, and HSS (Home Subscriber Server) are provided.
- S-CSCF Server-Call Session Control Function
- P-CSCF Proxy-Call Session Control Function
- P-CSCF # 2 P-CSCF # 2
- PCRF # 1, PCRF # 2, P-GW # 1, P-GW # 2, S-GW # 1, S-GW # 2 MME (Mobility Management Entity) # 1, MME # 2, e
- step S1001 the S-CSCF transmits a packet addressed to the UE to the P-CSCF # 1, and the P-CSCF # 1 Transmits a packet addressed to the UE to P-GW # 1, and P-GW # 1 transmits a packet addressed to the UE to S-GW # 1. It is assumed that such a packet includes “INVITE” addressed to the UE.
- step S1002 upon receiving a packet addressed to the UE, S-GW # 1 determines whether or not the packet should be transmitted to the specific bearer.
- the S-GW # 1 determines that such a packet should be transmitted to the specific bearer, the IMSI (International Mobile Subscriber Identity) and “Paging implementation flag” of the UE are sent to the MME # 1.
- IMSI International Mobile Subscriber Identity
- Paging implementation flag of the UE
- the S-GW # 1 may notify the MME # 1 of the necessity of transmission of “Paging” depending on whether or not the IMSI of the UE is set instead of the “Paging execution flag”.
- S-GW # 1 knows that MME # 1 has been restarted by the GTP signal (resume information) received before step S1002 when a packet is received in step S1002. Does not release the context information related to the bearer for the UE.
- the S-GW # 1 determines that such a packet should not be transmitted to the specific bearer, the S-GW # 1 discards the received packet. In such a case, S-GW # 1 may release the bearer related to the received packet. Moreover, S-GW # 1 may transmit “Delete Session Request” requesting deletion of the bearer to P-GW # 1.
- S-GW # 1 may transmit “Delete Session Request” in step S1006C after the elapse of a predetermined time after performing the process of step S1002, or immediately after performing the process of step S1002.
- “Delete Session Request” may be transmitted.
- step S1003 when MME # 1 receives such “Downlink Data Notification”, it determines whether or not the UE context information specified by the IMSI is managed.
- MME # 1 determines that the UE context information specified by the IMSI is not managed, and determines that the received “Downlink Data Notification” includes the “Paging implementation flag” In step S1004, “Paging” is transmitted to the UE.
- MME # 1 may determine whether or not it is necessary to transmit “Paging” based on whether or not the IMSI of the UE is set instead of the “Paging execution flag”.
- the UE Upon receiving “Paging” addressed to the UE, the UE releases the above-described bearer for the UE in Step S1005, and transmits “Attach Request” to the MME # 2 in Step S1007.
- step S1006A the S-CSCF retransmits the packet addressed to the UE to the P-CSCF # 1, and the P-CSCF # 1 retransmits the packet addressed to the UE to the P-GW # 1. Then, P-GW # 1 retransmits the packet addressed to the UE to S-GW # 1.
- the S-GW # 1 When the S-GW # 1 holds context information related to the bearer for the UE and receives a retransmitted packet addressed to the UE in step S1006A, the S-GW # 1 includes the IMSI of the UE to the MME # 1. "Downlink Data Notification" may be transmitted.
- S-GW # 1 may determine that “Paging” addressed to the UE has been transmitted, and discard the retransmitted packet addressed to the UE.
- MME # 1 When MME # 1 receives “Downlink Data Notification” in step S1006B, it may retransmit “Paging” addressed to the UE as in step S1004.
- MME # 1 may determine that “Paging” addressed to the UE is being transmitted, and discard the received “Downlink Data Notification”.
- the PCRF # 1 Upon receiving the “IP-CAN Session Release”, the PCRF # 1 releases the above-described UE context information. In step S1006E, the PCRF # 1 notifies the P-CSCF # 1 that “MME restart (MME # 1 restarts). The bearer release notification including “information indicating that it has been performed” ”is transmitted.
- P-CSCF # 1 When receiving the bearer release notification, P-CSCF # 1 transmits a bearer release notification including “MME restart (information indicating that MME # 1 has restarted)” to the S-CSCF in step S1006F. .
- the S-CSCF When the S-CSCF receives the bearer release notification, the S-CSCF holds the packet addressed to the UE in step S1006G. In such a case, if the packet transmitted in step S1001 is in the retransmission state, the packet is also suspended.
- step S1008 MME # 2 transmits “Update Location” including the identification information of the UE to the HSS.
- the HSS When the HSS receives the “Update Location”, the HSS transmits “Cancel Location” to the MME # 1 in step S1009.
- MME # 1 Upon receiving the “Cancel Location”, MME # 1 transmits “Cancel Location Ack” to the HSS in step S1010.
- the HSS When the HSS receives “Cancel Location Ack”, the HSS changes the location registration information of the UE, and transmits “Update Location Ack” to MME # 2 in step S1011.
- step S1012 MME # 1 transmits "Create Session Request" including a resumption counter (information indicating that MME # 1 has been resumed) to S-GW # 2. Note that the restart counter may not be set.
- S-GW # 2 When S-GW # 2 receives the “Create Session Request”, S-GW # 2 sets the above-mentioned bearer for UE, and MME restart flag (MME # 1 is restarted) for P-GW # 2 in step S1013. “Create Session Request” including the information).
- P-GW # 2 When P-GW # 2 receives the “Create Session Request”, it sets up the bearer for the above-mentioned UE.
- step S1014 the UE bearer setting process is continued among MME # 2, HSS, S-GW # 2, and P-GW # 2.
- step S1015 MME # 2 transmits “Attach Accept” to the UE.
- P-GW # 2 transmits “IP-CAN Session Establishment” to PCRF # 2 in step S1016.
- PFGW # 2 receives PCRF # 2. 2 transmits a bearer setting notification to P-CSCF # 2
- P-CSCF # 2 transmits a bearer setting notification to S-CSCF.
- P-CSCF # 2 may be the same as P-CSCF # 1.
- step S1020 the S-CSCF detects that the UE has reestablished the connection, and the P-GW # 2 and the S-GW # 1 address the UE to the suspended UE. Send the packet.
- S-GW # 2 is the same as S-GW # 1, and S-GW # 1 that has transmitted “Delete Session Request” in step S1002 continues to hold the bearer for UE even after a predetermined time has elapsed. If it is set, when “Create Session Request” is received in step S1013, the MME restart flag is set for P-GW # 1 in step S1014 without releasing the above-described bearer for UE. “Modify Bearer Request” including (information indicating that MME # 1 has been resumed) may be transmitted.
- the P-GW # 1 when receiving the “Modify Bearer Request”, the P-GW # 1 does not release the bearer for the above-described UE and reuses the bearer for the UE.
- the S-CSCF when the S-CSCF receives the bearer release notification, it is configured to hold the packet addressed to the UE. Then, when there is an incoming call addressed to an idle UE that has been registered in the IMS, the incoming call process to the UE can be performed immediately.
- PMIPv6 Proxy Mobile IP v6
- S-GW Serving Mobile IP v6
- the PCRF may receive an MME restart flag indicating that MME # 1 has been restarted from either the S-GW or the P-GW.
- the MME restart flag is notified to the P-GW by the PCC process in the section between the S-GW and the PCRF and in the section between the PCRF and the P-GW.
- the above-mentioned MME restart flag is notified to the P-GW by the “Proxy Binding Update” of the PMIPv6 signal.
- Modification 1 the mobile communication system according to Modification 1 of the above-described first embodiment will be described by focusing on differences from the above-described mobile communication system according to the first embodiment.
- the MME # 1 when the MME # 1 receives the “Attach Request” from the UE, the “Create Session Request” including a restart counter (information indicating that the MME # 1 has restarted) is sent to the S-GW # 1. ".
- S-GW # 1 When S-GW # 1 receives the “Create Session Request”, S-GW # 1 releases the bearer for the above-mentioned UE and indicates to P-GW # 1 that the MME restart flag (MME # 1 has been restarted). "Create Session Request” including (information).
- the P-GW # 1 releases the bearer for the above-mentioned UE and transmits “IP-CAN Session Establishment” to the PCRF # 1.
- the PCRF # 1 When the PCRF # 1 receives the “IP-CAN Session Establishment”, the PCRF # 1 releases the bearer for the UE and transmits a bearer setting notification to the P-CSCF # 2.
- the P-CSCF # 1 When the P-CSCF # 1 receives the bearer setting notification, the P-CSCF # 1 transmits a bearer setting notification to the S-CSCF.
- the first feature of the present embodiment is a mobile communication method, in which a bearer for UE (mobile station) is set between an S-GW (serving gateway device) and a P-GW (packet data network gateway device).
- a bearer for UE mobile station
- S-GW serving gateway device
- P-GW packet data network gateway device
- a step of transmitting an incoming signal a step of the S-GW notifying the P / S-CSCF that the MME has been resumed via the P-GW, and a step of sending the P / S-CSCF to the UE.
- the S-CSCF may hold the incoming signal addressed to the UE.
- the second feature of the present embodiment is the P / S-CSCF, which is addressed to the UE after the MME resumes in a state where a bearer for the UE is set between the S-GW and the P-GW.
- an incoming signal is received, it is configured to transmit an incoming signal addressed to the UE to the S-GW via the P-GW, and the S-GW notifies that the MME has resumed
- the S-GW notifies that the MME has resumed
- it is configured to hold the incoming signal addressed to the UE station, and after the UE is registered again in the IMS, it is held to the S-GW via the P-GW.
- the gist is that it is configured to transmit an incoming signal addressed to the UE.
- the operations of P-CSCF # 2, S-CSCF, eNB # 1, eNB # 2, and UE may be performed by hardware, may be performed by a software module executed by a processor, It may be implemented by a combination.
- Software modules include RAM (Random Access Memory), flash memory, ROM (Read Only Memory), EPROM (Erasable Programmable ROM), EEPROM (Electronically Erasable and Programmable, Removable ROM, and Hard Disk). Alternatively, it may be provided in a storage medium of an arbitrary format such as a CD-ROM.
- Such a storage medium is connected to the processor so that the processor can read and write information from and to the storage medium. Further, such a storage medium may be integrated in the processor.
- Such a storage medium and processor may be provided in the ASIC.
- the ASIC includes MME # 1, MME # 2, S-GW # 1, S-GW # 2, P-GW # 1, P-GW # 2, PCRF # 1, PCRF # 2, P-CSCF # 1, P-CSCF # 2, S-CSCF, eNB # 1, eNB # 2, and UE may be provided.
- the storage medium and the processor have MME # 1, MME # 2, S-GW # 1, S-GW # 2, P-GW # 1, P-GW # 2, PCRF # 1, and PCRF # as discrete components.
- P-CSCF # 1, P-CSCF # 2, S-CSCF, eNB # 1, eNB # 2 may be provided in the UE.
Abstract
Description
図1及び図2を参照して、本発明の第1の実施形態に係る移動通信システムについて説明する。
以下、上述の第1の実施形態の変更例1に係る移動通信システムについて、上述の第1の実施形態に係る移動通信システムとの相違点に着目して説明する。
Claims (3)
- サービングゲートウェイ装置とパケットデータネットワークゲートウェイ装置との間で移動局用のベアラが設定されている状態で、移動管理ノードが、再開する工程と、
呼セッション制御サーバ装置が、前記パケットデータネットワークゲートウェイ装置を介して、前記サービングゲートウェイ装置に対して、前記移動局宛ての着信信号を送信する工程と、
前記サービングゲートウェイ装置が、前記パケットデータネットワークゲートウェイ装置を介して、前記呼セッション制御サーバ装置に対して、前記移動管理ノードが再開したことを通知する工程と、
前記呼セッション制御サーバ装置が、前記移動局宛ての着信信号を保留する工程と、
前記移動局が、再度登録された後に、前記呼セッション制御サーバ装置が、前記パケットデータネットワークゲートウェイ装置を介して、前記サービングゲートウェイ装置に対して、保留している該移動局宛ての着信信号を送信する工程とを有することを特徴とする移動通信方法。 - 前記呼セッション制御サーバ装置は、プロキシ用呼セッション制御サーバ装置とサービング用呼セッション制御サーバ装置とによって構成されており、
前記サービング用呼セッション制御サーバ装置が、前記移動局宛ての着信信号を保留することを特徴とする請求項1に記載の移動通信方法。 - 呼セッション制御サーバ装置であって、
サービングゲートウェイ装置とパケットデータネットワークゲートウェイ装置との間で移動局用のベアラが設定されている状態で、移動管理ノードが再開した後に、該移動局宛ての着信信号を受信した場合に、該パケットデータネットワークゲートウェイ装置を介して、該サービングゲートウェイ装置に対して、該移動局宛ての着信信号を送信するように構成されており、
前記サービングゲートウェイ装置から、前記移動管理ノードが再開したことを通知された場合に、前記移動局宛ての着信信号を保留するように構成されており、
前記移動局が、再度登録された後に、前記パケットデータネットワークゲートウェイ装置を介して、前記サービングゲートウェイ装置に対して、保留している前記移動局宛ての着信信号を送信するように構成されていることを特徴とする呼セッション制御サーバ装置。
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US13/703,917 US20130142120A1 (en) | 2010-06-16 | 2011-06-13 | Mobile communication method and call session control server device |
CN201180028936XA CN102948248A (zh) | 2010-06-16 | 2011-06-13 | 移动通信方法以及呼叫对话控制服务器装置 |
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JP5011439B2 (ja) | 2011-01-07 | 2012-08-29 | 株式会社エヌ・ティ・ティ・ドコモ | 移動通信方法、移動管理ノード及びサービングゲートウェイ装置 |
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CN104145515A (zh) * | 2012-02-24 | 2014-11-12 | 株式会社Ntt都科摩 | 移动台以及通信方法 |
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JP2012004847A (ja) | 2012-01-05 |
JP5342511B2 (ja) | 2013-11-13 |
US20130142120A1 (en) | 2013-06-06 |
CN102948248A (zh) | 2013-02-27 |
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