WO2009139306A1 - Système de communication et procédé de gestion de configuration redondante - Google Patents

Système de communication et procédé de gestion de configuration redondante Download PDF

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Publication number
WO2009139306A1
WO2009139306A1 PCT/JP2009/058548 JP2009058548W WO2009139306A1 WO 2009139306 A1 WO2009139306 A1 WO 2009139306A1 JP 2009058548 W JP2009058548 W JP 2009058548W WO 2009139306 A1 WO2009139306 A1 WO 2009139306A1
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WO
WIPO (PCT)
Prior art keywords
session
user data
redundant
setting information
devices
Prior art date
Application number
PCT/JP2009/058548
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English (en)
Japanese (ja)
Inventor
裕司 鈴木
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日本電気株式会社
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Filing date
Publication date
Application filed by 日本電気株式会社 filed Critical 日本電気株式会社
Publication of WO2009139306A1 publication Critical patent/WO2009139306A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/04—Arrangements for maintaining operational condition
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W8/00—Network data management
    • H04W8/02—Processing of mobility data, e.g. registration information at HLR [Home Location Register] or VLR [Visitor Location Register]; Transfer of mobility data, e.g. between HLR, VLR or external networks
    • H04W8/04—Registration at HLR or HSS [Home Subscriber Server]

Definitions

  • the present invention relates to a communication system having an N + ⁇ redundant configuration and a redundant configuration management method thereof.
  • Next-generation high-speed wireless communication adopting Mobile WiMAX Worldwide Interoperability for Microwave Access
  • Mobile IP Internet Protocol
  • IETF Internet Engineering Task Force
  • Mobile WiMAX is also expected to provide services to large-scale users who own a large number of mobile terminals in order to support wireless communication in a wide range of wireless areas and high-speed movement. Therefore, Home Agent compatible with mobile WiMAX, which manages location information for each mobile terminal, and relays user data transmitted and received between the mobile terminal and the network such as the Internet, includes a large number of movements used by large-scale users. A device configuration that manages location information for each terminal and realizes large-capacity data transfer is desired.
  • Mobile WiMAX provides connection services to the Internet etc. even to mobile terminals moving at high speed as described above
  • Home Agent is required to have high reliability capable of always providing stable services.
  • an inexpensive system configuration that can flexibly cope with an increase in the number of users and an increase in traffic volume is desired.
  • a Home Agent compatible with mobile WiMAX is often constructed by combining a plurality of PC (Personal Computer) -based user data transfer devices operating under a general-purpose OS such as Linux.
  • PC Personal Computer
  • N is a positive integer
  • ACT current
  • ⁇ a positive integer
  • an SBY system device (hereinafter SBY system devices) ) Will continue to provide services on behalf of the failed ACT device.
  • the SBY device identifies an ACT device (hereinafter referred to as a failure device) in which the failure has occurred, and is used by the failure device to provide a service. Further, setting information such as an IP address, routing information, and information on a terminal group to be registered in a session is acquired, the setting information is registered in the own apparatus, and switching is made to an ACT system that operates on behalf of the faulty apparatus.
  • a failure device an ACT device in which the failure has occurred
  • setting information such as an IP address, routing information, and information on a terminal group to be registered in a session is acquired, the setting information is registered in the own apparatus, and switching is made to an ACT system that operates on behalf of the faulty apparatus.
  • the SBY system apparatus takes a long time for the SBY system apparatus to take over the operation of the failure apparatus, and there is a problem that the interruption time of the connection service to the Internet etc. provided to the user becomes long.
  • the communication system such as Home Agent
  • the communication system such as Home Agent
  • the communication system such as Home Agent
  • the communication system such as Home Agent
  • the communication system such as Home Agent
  • the information communication between user data transfer devices also uses a general-purpose IP protocol
  • the SBY system device takes a long time to acquire setting information including a large amount of IP addresses and routing information used by the fault device.
  • a configuration may be considered in which dedicated hardware is provided to share setting information, session information, and the like between the ACT system device and the SBY system device, but this increases the cost of the communication system.
  • an object of the present invention is to provide a communication system capable of minimizing the service interruption time when a failure occurs without causing an increase in cost.
  • the communication system of the present invention comprises a plurality of constantly operating devices operating at all times, and at least one redundant device replacing the currently used device in which a failure has occurred.
  • Have The redundant device is It is configured to hold setting information of all of the currently used apparatuses and session information indicating the state of the session.
  • the redundant configuration management method includes, for each user, a plurality of active devices operating at all times, and at least one redundant device replacing the active device in which a failure has occurred.
  • a redundant configuration management method in a communication system comprising a plurality of user data transfer devices for transferring user data generated in a session, comprising: The redundant system device holds setting information including an IP address and routing information used for transfer of the user data, and session information indicating a state of a session for each of the active systems.
  • the redundant device is held by its own device based on the setting information and session information corresponding to the currently used device where the failure has occurred. It is a method of continuing the transfer of the user data in place of the currently used device in which the failure has occurred.
  • FIG. 1 is a block diagram showing a configuration example of a communication system of the present invention.
  • FIG. 2 is a sequence diagram showing an operation example of the communication system shown in FIG.
  • FIG. 1 is a block diagram showing a configuration example of a communication system of the present invention.
  • the communication system 1 of the present invention realizes, for example, a Home Agent compatible with mobile WiMAX, and N + 1 user data transfer devices 2 for transferring user data generated in a session for each user. and 1 to 2 N + 1, monitors the status of each user data transfer device 2 1 - 2 N + 1, and the management unit 3 that manages the setting information of the user data transfer device 2 1 every 2 N + 1, the user data transfer device 2 1 And a database 4 in which setting information for each of 2N + 1 is stored.
  • the N + 1 user data transfer devices 2 1 to 2 N + 1 and the management device 3 are connected to each other via the layer 2 switch (L2SW) 5.
  • the user data transfer devices 2 1 to 2 N + 1 are connected to the mobile IP network via the layer 2 switch 5.
  • the management device 3 monitors the states of the system data setting device 31 which transmits the setting information stored in the database 4 to each of the user data transfer devices 2 1 to 2 N + 1 at the time of system activation, and the user data transfer devices 2 1 to 2 N + 1. And a device management unit 32 that detects the presence or absence of a failure.
  • a computer such as a workstation server is used in the management device 3, and information such as configuration information of the communication system 1 and an IP address used for information communication in the communication system 1 are registered in advance.
  • the configuration information of the communication system 1 includes information indicating the number of user data transfer devices 2 1 to 2 N + 1 , the user data transfer device operating as an ACT system device, and the device number of the user data transfer device operating as an SBY system device. Contains.
  • the management device 3 When each user data transfer device in the communication system 1 is activated, the management device 3 transmits corresponding setting information to the user data transfer devices 2 1 to 2 N + 1 and all the user data transfer devices 2 1 to 2 It monitors the operation of N + 1 and determines whether or not a failure occurs.
  • the user data transfer devices 2 1 to 2 N + 1 are PC-based communication devices that operate on a general-purpose OS (Operating System) such as Linux, and store processing devices including a CPU and programs and data for operating the CPU. Storage device.
  • a general-purpose OS such as Linux
  • N user data transfer devices 2 1 to 2 N are used as ACT devices
  • one user data transfer device 2 N + 1 is used as an SBY device.
  • ACT device refers to the user data transfer devices 2 1 to 2 N
  • SBY refers to the user data transfer device 2 N + 1 .
  • the operator of the communication system 1 assigns the above-described apparatus-specific setting information to the ACT system apparatus.
  • the setting information for each ACT system device is stored in the database 4 connected to the management device 3 and is transmitted from the system setting unit 31 provided in the management device 3 to each ACT system device at the time of system startup.
  • the ACT device When the ACT device receives setting information from the management device 3 after device activation, the ACT device provides communication service (connection service to the Internet, etc.) to the mobile terminal of the user based on the setting information.
  • communication service connection service to the Internet, etc.
  • the SBY system device provided in the conventional communication system does not have the setting information necessary for providing the service even after the start of the device.
  • the SBY system apparatus included in the communication system 1 of the present invention acquires setting information of N ACT system apparatuses from the management apparatus 3 at the time of apparatus startup and holds the setting information.
  • the ACT system device When provision of service to the user is started by the communication system 1 shown in FIG. 1 and registration of location information is requested from the mobile terminal of the user, the ACT system device performs the user processing by the mobile terminal simultaneously with registration processing of the location information. Create a session to use for data transfer. At this time, each ACT device transmits session information indicating the state of the session of the own device to the SBY device.
  • the SBY system apparatus has a memory area for storing session information for each of N ACT system apparatuses, receives session information corresponding to the state of each session from each ACT system apparatus, and corresponds to the ACT system apparatus Session information in association with each other. As a result, the SBY system apparatus matches the session information of each ACT system apparatus held by the SBY system with the session state of each ACT system apparatus.
  • the management device 3 monitors the operation state of the user data transfer devices 2 1 to 2 N + 1 , and when a failure occurs in any ACT system device, the device management unit 32 detects the occurrence of the failure.
  • the management device 3 When the management device 3 detects a failure that has occurred in the ACT system device, the management device 3 instructs the SBY system device to switch from the SBY system to the ACT system, which includes information on the device number of the ACT system device where the failure has occurred. While transmitting the switching notification, the operation of the ACT related device where the failure has occurred is reset and disconnected from the communication system.
  • the SBY device When receiving the switching notification from the management device, the SBY device registers the setting information of the failed ACT device with the own device, validates the session information corresponding to the ACT device, and provides the service to the user. Start.
  • the SBY system apparatus switches to the ACT system apparatus, if the SBY system apparatus registers setting information in its own apparatus using an API (Application Program Interface) provided by the OS, it is based on the setting information. It takes time for the operation to become effective. Therefore, in the present invention, the SBY system apparatus stores setting information of all ACT system apparatuses in a kernel area which is a memory area used by an OS (Operating System). In this way, for example, the setting information of the ACT system device specified by only one command specifying the device number can be reflected on the own device. Therefore, the time until the operation based on the setting information becomes effective is shortened.
  • an API Application Program Interface
  • the SBY system device of the present invention When switching to an ACT system device, the SBY system device of the present invention does not need to acquire setting information and session information from another device, and is specified from the management device 3 using only information held by the own device. The operation of the ACT system device can be taken over. Therefore, the SBY device can quickly take over the operation of the ACT device specified by the management device 3 and the state of the session, so that the service interruption time at the time of failure occurrence is minimized, and the user fails Provide services that are not aware of the occurrence of
  • the SBY system device When the SBY system device is activated later than the ACT system device, the SBY system device can not acquire session information related to the session created by the ACT system device before activation. Therefore, the session information held by the SBY system device may not match the session state of the ACT system device.
  • location information of each mobile terminal is periodically transmitted, and session information indicating update of a session is periodically sent to the SBY device from an ACT device providing a service to the mobile terminal. Is sent. Therefore, even if the session information held by the SBY apparatus immediately after startup does not match the session state of the ACT apparatus, the SBY apparatus does not match the position information transmitted from the mobile terminal. The state of the session of the ACT system device providing the service to the mobile terminal can be matched with the session information corresponding to the ACT system device.
  • FIG. 2 is a sequence diagram showing an operation example of the communication system shown in FIG.
  • the management device 3 starts the state monitoring of the (N + 1) each user data transfer devices by the state management unit 32.
  • the management apparatus 3 sequentially transmits setting information corresponding to each of the ACT system devices by the system setting unit 31.
  • the management device 3 also transmits setting information of each ACT system device to the SBY system device, and the SBY system device associates the ACT system device with the corresponding setting information and stores it in the memory area of the own device. .
  • the ACT system device having received the setting information registers the setting information in the own device and starts service for the user.
  • an ACT-based device that has started the service creates a session used by the user (mobile terminal), and transfers user data of the user.
  • the session update signal position information update signal
  • the session state is updated. Every time a session is created or updated, the ACT device transmits session information indicating the state of the session to the SBY device.
  • the SBY device stores the session information received from the ACT device in association with the device number of the ACT device.
  • the SBY device updates the held session information for each ACT device based on the session information transmitted from the ACT device. As a result, the SBY system device matches the session information held for each ACT system device with the state of the session of each ACT system device.
  • the ACT device deletes the session and transmits session information indicating the deletion of the session to the SBY device.
  • the SBY system device receives session information indicating deletion of a session, the SBY system device deletes session information corresponding to the ACT system device.
  • the management device 3 detects the occurrence of the failure by the device management unit 32, and the SBY device A switching notification is sent to instruct switching from the SBY system to the ACT system including the device number of the faulty device. Also, the management device 3 forcibly resets the operation of the faulty device by the device management unit 32 in order to physically disconnect the faulty device from the communication system.
  • the SBY device receiving the switching notification from the management device 3 fetches the setting information of the ACT device specified from the management device 3 held in the kernel area into the own device based on the device number included in the switching notification.
  • the session information of the ACT system device is validated, and a switching completion notification indicating the completion of switching from the SBY system to the ACT system is transmitted to the management device 3.
  • the old SBY system apparatus newly switched to the ACT system starts service for the user using the same setting information (IP address and routing information) and session information as the failed apparatus operating as the ACT system.
  • IP address and routing information IP address and routing information
  • session information IP address and routing information
  • creation, update, and deletion of sessions are also executed by the old SBY system device that has newly transitioned to the ACT system, transfer processing of user data using an existing session created by the faulty device continues without interruption. it can.
  • the session information is transmitted from the ACT system device to the SBY system device when a session is created or updated, so in a large-scale communication system that accommodates a large number of users, the SBY from a large number of ACT system devices. Session information is simultaneously transmitted to the system device, which may cause congestion in the SBY system device.
  • session information is transmitted from an ACT system device to an SBY system device at predetermined cycles that do not depend on the occurrence of a session or update.
  • session information is transmitted from all ACT devices to SBY devices, congestion occurs in the SBY devices as described above. Therefore, it is preferable to limit the number of ACT devices that simultaneously transmit session information, and to divide the session information of all the ACT devices into a plurality of times for transmission to the SBY device.
  • the management device instructs each ACT system device to transmit timing of session information so that the replication cycle of each ACT system device does not overlap, and each ACT system device transmits session information according to the instruction from the management device. It is also good.
  • the features of the present invention are illustrated by taking the communication system of N + 1 redundant configuration as an example, but the present invention can be applied to a communication system of N + ⁇ redundant configuration including a plurality of SBY devices ( ⁇ units).
  • the processing load of the ACT device may increase by the number of SBY devices.
  • the SBY system apparatus since the SBY system apparatus holds setting information for each ACT system apparatus in the kernel area, the SBY system apparatus can be switched at high speed to an ACT system apparatus serving as a substitute for a failure apparatus.
  • the SBY device fails as the SBY device maintains the session information of the ACT device by updating the session information of the ACT device as triggered by the creation or update of the session in the ACT device. You can take over the session you were creating quickly. Therefore, the interruption time of the service at the time of the occurrence of the failure can be minimized, and the service can be provided without the user being aware of the occurrence of the failure.
  • an inexpensive communication system consisting of PC-based communication devices can be constructed, and communication service can be continued with one SBY device even if a failure occurs in any of a plurality of ACT devices.
  • a telecommunications carrier that provides telecommunications services can reduce capital investment.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Telephonic Communication Services (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

Un dispositif redondant mémorise des informations de configuration, comprenant des adresses IP et des informations d'acheminement utilisées pour transférer des données d'utilisateur, et des informations de session pour chaque dispositif utilisé. Ensuite, dans le cas où un problème survient avec l'un quelconque des dispositifs utilisés, le dispositif redondant poursuit le transfert des données d'utilisateur à la place dudit dispositif utilisé sur la base des informations de configuration mémorisées et des informations de session correspondant au dispositif utilisé où le problème est survenu.
PCT/JP2009/058548 2008-05-15 2009-05-01 Système de communication et procédé de gestion de configuration redondante WO2009139306A1 (fr)

Applications Claiming Priority (2)

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JP2008128423A JP2009278436A (ja) 2008-05-15 2008-05-15 通信システム及び冗長構成管理方法
JP2008-128423 2008-05-15

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WO2009139306A1 true WO2009139306A1 (fr) 2009-11-19

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Publication number Priority date Publication date Assignee Title
US20110235505A1 (en) * 2010-03-29 2011-09-29 Hitachi, Ltd. Efficient deployment of mobility management entity (MME) with stateful geo-redundancy
JP5596637B2 (ja) * 2011-08-02 2014-09-24 日本電信電話株式会社 障害切替システム、障害切替装置および障害切替方法

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004260267A (ja) * 2003-02-24 2004-09-16 Nec Corp 無線基地局装置およびその制御方法
JP2006254111A (ja) * 2005-03-10 2006-09-21 Hitachi Communication Technologies Ltd Ｉｐ電話システム
JP2007510332A (ja) * 2003-10-24 2007-04-19 ユーティースターコム・インコーポレーテッド ポイントツーポイント・プロトコル・デバイスの冗長性のためのシステムおよび方法
JP2007133542A (ja) * 2005-11-09 2007-05-31 Nippon Telegr & Teleph Corp <Ntt> 情報引継ぎシステム、情報引継ぎ方法、現用系ノード及び待機系ノード

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005114910A1 (fr) * 2004-05-21 2005-12-01 Xyratex Technology Limited Procede de traitement de donnees, carte d'analyse de reseau, hote et systeme de detection d'intrusion

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004260267A (ja) * 2003-02-24 2004-09-16 Nec Corp 無線基地局装置およびその制御方法
JP2007510332A (ja) * 2003-10-24 2007-04-19 ユーティースターコム・インコーポレーテッド ポイントツーポイント・プロトコル・デバイスの冗長性のためのシステムおよび方法
JP2006254111A (ja) * 2005-03-10 2006-09-21 Hitachi Communication Technologies Ltd Ｉｐ電話システム
JP2007133542A (ja) * 2005-11-09 2007-05-31 Nippon Telegr & Teleph Corp <Ntt> 情報引継ぎシステム、情報引継ぎ方法、現用系ノード及び待機系ノード

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JP2009278436A (ja) 2009-11-26

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