WO2010050346A1 - Système de communication sans fil, dispositif de contrôle d’un chemin de données, et procédé de contrôle d’un chemin de données - Google Patents

Système de communication sans fil, dispositif de contrôle d’un chemin de données, et procédé de contrôle d’un chemin de données Download PDF

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Publication number
WO2010050346A1
WO2010050346A1 PCT/JP2009/067479 JP2009067479W WO2010050346A1 WO 2010050346 A1 WO2010050346 A1 WO 2010050346A1 JP 2009067479 W JP2009067479 W JP 2009067479W WO 2010050346 A1 WO2010050346 A1 WO 2010050346A1
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WO
WIPO (PCT)
Prior art keywords
base station
switching
gateway
mobile terminal
access router
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PCT/JP2009/067479
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English (en)
Japanese (ja)
Inventor
一平 秋好
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日本電気株式会社
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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 WO2010050346A1 publication Critical patent/WO2010050346A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/10—Reselecting an access point controller
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W92/00—Interfaces specially adapted for wireless communication networks
    • H04W92/04—Interfaces between hierarchically different network devices
    • H04W92/12—Interfaces between hierarchically different network devices between access points and access point controllers

Definitions

  • the present invention relates to a radio communication system in which a mobile terminal connects to an access router via a base station device.
  • WiMAX Worldwide Interoperability for Microwave Access
  • WiMAX is a wireless communication system that covers a communication area with a cell configured by wireless base stations (WiMAX End-to-End Network Systems 3 Stage 3 Reconstruction Stage 3 Stage 1 Stage 3). .2, Jan., 2008 (hereinafter referred to as Reference 1)).
  • WiMAX wireless communication system communication of mobile terminals over a wide range is possible by arranging a plurality of cells.
  • FIG. 1 is a block diagram showing a configuration of a general WiMAX network.
  • the WiMAX network 91 includes a CSN (Connectivity Service Network) 92 and an ASN (Access Service Network) 93.
  • the CSN 92 includes an HA (Home Agent) 910 and an AAA (Authentication, Authorization, and Accounting) server 920.
  • HA Home Agent
  • AAA Authentication, Authorization, and Accounting
  • the ASN 93 includes an ASN-GW (Gateway) 930 and a BS (Base Station) 940.
  • BS 940 is a base station apparatus connected to mobile terminal 950 via a wireless line.
  • the ASN-GW 930 is an access router that connects to the mobile terminal 950 via the BS 940, and functions as a gateway for connecting the mobile terminal 950 to the CSN 92.
  • the ASN-GW 930 and the BS 940 implicitly form a tree topology, and the BS is connected to one of the ASN-GWs.
  • switching of the ASN-GW is accompanied by switching of the BS.
  • Document 2 Japanese Patent Laid-Open No. 2005-27119 (hereinafter referred to as Document 2) is an example of PHS (Personal Handyphone System) instead of WiMAX, but discloses a similar technology for switching a gateway device with BS switching. .
  • PHS Personal Handyphone System
  • ASN-GW access routers
  • CSN same network
  • An object of the present invention is to provide a technique for switching an access router that controls a mobile terminal while the mobile terminal is connected to the same base station apparatus.
  • the wireless communication system of the present invention includes: A base station device connected to a mobile terminal via a wireless line; A plurality of access routers connected to the mobile terminal via the base station device and having a function of controlling the mobile terminal, When a request to switch the access router to which the mobile terminal is connected occurs, the base station device connected to the mobile terminal and the access router connected to the mobile terminal via the base station device cooperate with each other Thus, the connection destination of the mobile terminal is switched from the access router to another access router without switching the base station apparatus.
  • FIG. 2 is a block diagram showing the configuration of the communication system of the present embodiment.
  • the communication system 10 includes a base station device 11 and a plurality of access routers 12.
  • the base station apparatus 11 is connected to the mobile terminal via a wireless line.
  • the access router 12 has a function of connecting to the mobile terminal 13 via the base station apparatus 11 and controlling the mobile terminal 13.
  • the access router 12 is connected to the network 14 and has a function as a gateway that forms a data path between the mobile terminal 13 and the network 14.
  • a base station apparatus 11 and a plurality of access routers 12 are connected in a mesh topology, and an access for controlling the mobile terminal 13 while the mobile terminal 13 remains connected to the same base station apparatus 11.
  • the router 12 can be switched.
  • FIG. 3 is a block diagram showing the configuration of the WiMAX network of the present embodiment.
  • the WiMAX network 20 includes a CSN 21 and an ASN 22.
  • the mobile terminal 27 is a terminal that complies with the Mobile Station (MS) specification described in Document 1.
  • the CSN 21 includes an HA function device 23 and an AAA server function device 24.
  • the HA function device 23 has a WiMAX Home Agent function.
  • the Home Agent function is an anchor node function that supports mobile IP conforming to the HA specification described in Document 1. Note that the HA function device 23 does not need to exist as an independent device as long as it has the Home Agent function. For example, other functions may coexist in the HA function device 23.
  • the AAA server function device 24 has a function as a WiMAX AAA (Authentication, Authorization, and Accounting) server.
  • the function as the AAA server is specifically an authentication server function compliant with the AAA specification described in Document 1.
  • the AAA server function device 24 does not need to exist as an independent device as long as it has the function of an AAA server.
  • the ASN 22 has a GW (Gateway) function device 25 and a BS function device 26.
  • the GW function device 25 is a device corresponding to the access router of FIG. 2, and has a WiMAX ASN-GW function.
  • the ASN-GW function is a GW function compliant with the ASN-GW specification described in Document 1.
  • the GW function device 25 when the GW function device 25 further switches the GW function, the ASN-GW Relocation-REQ / RSP / CNF / ACK message is transmitted to and received from the BS function device 26, and the ASN-GW Relocation- It has a function to execute the CSN Anchored Mobility Management procedure triggered by the reception of CNF.
  • the GW function device 25 does not need to exist as an independent device as long as it has the above functions.
  • the BS function device 26 is a device corresponding to the base station device 11 of FIG. 2 and has a function as a WiMAX base station.
  • the WiMAX base station function is a base station function conforming to the BS specification described in Document 1.
  • the BS functional device 26 further transmits and receives an ASN-GW Relocation-REQ / RSP / CNF / ACK message with the GW functional device 25 and ASN-GW Relocation when switching the GW function.
  • a function of executing a process of switching a data path to the mobile terminal 27 to a path via the switching destination GW function device 25 triggered by reception of the REQ is provided.
  • the BS function device 26 does not need to exist as an independent device as long as it has a function as a base station.
  • the GW functional device 25 and the BS functional device 26 form a mesh topology, and any BS functional device 26 can be connected to any GW functional device 25.
  • FIG. 4 is a sequence diagram showing the operation of the WiMAX network 20. 4 shows a switching from GW function device 25 1 to the GW function unit 25 2 is illustrated.
  • the mobile terminal 27 performs communication via the HA functional device 23, the GW functional device 25 1 , and the BS functional device 26.
  • GW function device 25 the GW function of controlling the mobile terminal 27 and decided to switch to the GW function unit 25 2.
  • This decision logic is assumed to be performed by, for example, a load balancing process for balancing the processing loads of the GW function devices 25 1 and 25 2 .
  • GW function device 25 1 When deciding to switch the GW function, GW function device 25 1, to the BS function unit 26 in communication with the mobile terminal 27 transmits the ASN-GW Relocation-REQ message (step 101).
  • the ASN-GW Relocation-REQ message includes the terminal identifier indicating the GW identifier indicating the GW function device 25 2 is a switching destination GW function, the mobile terminal 27 is a switching targets.
  • the BS functional device 26 Upon receiving the ASN-GW Relocation-REQ message, the BS functional device 26 transmits an ASN-GW Relocation-RSP message as a response (Step 102). Furthermore, BS function unit 26, the data path is to change to go through the GW function device 25 2, Path a Reg REQ message, and transmits to the GW function device 25 2 shown by GW identifier (step 103) .
  • the Path Reg REQ message includes a GW identifier indicating GW function device 25 1 is switched from.
  • GW function device 25 2 Path Reg REQ message, and transfers the GW function device 25 1 is a switching source indicated by GW identifier (step 104).
  • GW function device 25 1, Path Reg when REQ receiving the message, sends the Path Reg RSP message as a response to the GW function unit 25 2 (step 105).
  • GW function device 25 2 transfers the Path Reg RSP message to the BS function unit 26 (step 106).
  • Path Reg the RSP receiving the message, sends the Path Reg ACK message as a response to the GW function unit 25 2 (step 107).
  • GW function device 25 2 transfers the Path Reg ACK message to the GW function device 25 1 (step 108).
  • BS function unit 26 upon transmitting a Path Reg ACK in step 107, to indicate that the switching of the data path is completed, transmits the ASN-GW Relocation CNF message to the GW function device 25 1 (step 109) .
  • GW function unit 25 1 receives the ASN-GW Relocation CNF message, transmits the ASN-GW Relocation ACK message as a response to the BS function unit 26 (step 110).
  • the mobile terminal 27 performs communication via the HA function device 23, the GW function device 25 1 , the GW function device 25 2 , and the BS function device 26.
  • the GW function unit 25 1 of the switching source receives the ASN-GW Relocation ACK message, starts the CSN Anchored Mobility Management process (step 111).
  • the CSN Anchored Mobility Management process is a movement control of the mobile terminal 27 using the CSN as an anchor, and details are described in Document 1.
  • the mobile terminal 27 performs communication via the BS functional device 26, the GW functional device 25 2 that is the switching destination, the GW functional device 25 1 that is the switching source, and the HA functional device 23.
  • the mobile terminal 27 shifts from the current state to a state in which the mobile terminal 27 performs communication via the BS function device 26, the GW function device 25 2 , and the HA function device 23.
  • the mobile terminal 27 communicates via the HA functional device 23, the GW functional device 25 2 , and the BS functional device 26.
  • FIG. 5 is a block diagram showing a configuration of the GW function device 25 according to the present embodiment.
  • the GW function device 25 includes a GW addition processing unit 25A and a GW deletion processing unit 25B.
  • the GW addition processing unit 25A switches the communication data path of the mobile terminal 27 connected to the BS function device 26 from the route passing through the own device to the route passing through the other GW function device 25.
  • the previous GW function device 25 is added.
  • the BS functional device 26 adds the switching destination GW functional device 25 to the route.
  • the switching source GW function device 25 gives the instruction by transmitting an ASN-GW Relocation-REQ message to the BS function device 26.
  • the GW deletion processing unit 25B deletes the switching source GW functional device 25 which is the own device from the route obtained by the GW addition processing unit 25A adding the switching destination GW functional device 25 to the route.
  • the GW deletion processing unit 25B starts a process for deleting the switching source GW function device 25 that is the own device.
  • the GW deletion processing unit 25B determines that the addition to the path of the switching destination GW functional device 25 is completed by receiving the ASN-GW Relocation-CNF message.
  • the process for deleting the switching source GW function device 25 from the route is a process for executing the CSN Anchored Mobility Management procedure.
  • the GW function device 25 that controls the mobile terminal 27 can be switched while the mobile terminal 27 is connected to the same BS function device 26. At that time, since switching is performed using processing defined by WiMAX, the addition or change of the function to the system when the switching function is added to the WiMAX system can be suppressed. For example, since the GW function device 25 performs the switching decision and the activation of the CSN Anchored Mobility Management process, it is not necessary to add or change functions in the BS function device 26.
  • FIG. 6 is a block diagram showing the configuration of the WiMAX network according to the present embodiment.
  • the WiMAX network 30 includes a CSN 31 and an ASN 32.
  • the CSN 31 includes an HA 33 and an AAA server 34.
  • HA33 is a device having a WiMAX Home Agent function.
  • the Home Agent function is an anchor node function that supports mobile IP conforming to the HA specification described in Document 1.
  • the AAA server 34 is a device having a function as a WiMAX AAA server.
  • the function as the AAA server is specifically an authentication server function compliant with the AAA specification described in Document 1.
  • ASN32 has ASN-GW25 and BS26.
  • the ASN-GW 35 is a WiMAX ASN-GW corresponding to the access router of FIG.
  • the ASN-GW function is a GW function compliant with the ASN-GW specification described in Document 1.
  • the ASN-GW 35 transmits / receives an ASN-GW Relocation-REQ / RSP / CNF / ACK message to / from the BS 36 and receives the ASN-GW Relocation-CNF.
  • it has a function to execute the CSN Anchored Mobility Management procedure.
  • the BS 36 is a WiMAX base station corresponding to the base station apparatus 11 of FIG.
  • the WiMAX base station function is a base station function conforming to the BS specification described in Document 1.
  • the BS 36 further transmits / receives an ASN-GW Relocation-REQ / RSP / CNF / ACK message with the ASN-GW 35 and ASN-GW Relocation-REQ reception when switching the ASN-GW.
  • a function of executing a process of switching the data path to the mobile terminal 37 to a path via the switching destination ASN-GW 35 is provided.
  • the ASN-GW 35 and the BS 36 form a mesh topology, and any BS 36 can be connected to any ASN-GW 35.
  • FIG. 7 is a sequence diagram showing the operation of the WiMAX network 30 of the present embodiment.
  • FIG. 7 exemplifies switching from ASN-GW 351 1 to ASN-GW 35 2 .
  • the mobile terminal 37 communicates via the HA 33, ASN-GW 35 1 , and BS 26.
  • ASN-GW35 1 is a decided to switch the ASN-GW for controlling the mobile terminal 37 to the ASN-GW35 2.
  • This decision logic is assumed to be performed by, for example, a load balancing process.
  • ASN-GW35 1, to the BS36 are connected to the mobile terminal 37 transmits the ASN-GW Relocation-REQ message (step 201).
  • the ASN-GW Relocation-REQ message, the Anchor ASN GW ID indicating the ASN-GW35 2 to switch to include Mobile Station Identifier (MSID) of a mobile terminal 37 is a switching targets.
  • the BS 36 Upon receiving the ASN-GW Relocation-REQ message, the BS 36 transmits an ASN-GW Relocation-RSP message as a response (Step 202). Furthermore, BS 36, since the data paths are modified to via ASN-GW35 2, transmits the Path Reg REQ message to the ASN-GW35 2 (step 203).
  • the Path Reg REQ message includes Anchor ASN GW ID indicating the ASN-GW35 1 is a switching source.
  • ASN-GW35 2 transfers the Path Reg REQ message to the ASN-GW35 1 (step 204).
  • ASN-GW35 1 receives the Path Reg REQ message, and transmits the Path Reg RSP message as a response to the ASN-GW35 2 (step 205).
  • ASN-GW35 2 forwards the Path Reg RSP message to the BS 36 (Step 206).
  • BS36 receives the Path Reg RSP message, transmits a Path Reg ACK message as a response to the ASN-GW35 2 (step 207).
  • ASN-GW35 2 forwards the Path Reg ACK message to the ASN-GW35 1 (step 208).
  • BS 36 once sends the Path Reg ACK in step 207, to indicate that the switching of the data path is completed, transmits the ASN-GW Relocation CNF message to the ASN-GW35 1 (step 209).
  • the ASN-GW 351 1 Upon receiving the ASN-GW Relocation CNF message, the ASN-GW 351 1 transmits an ASN-GW Relocation ACK message to the BS 36 as a response (Step 210).
  • the mobile terminal 37 performs communication via the HA 33, ASN-GW 35 1 , ASN-GW 35 2 , and BS 36.
  • the switching source ASN-GW 351 1 When receiving the ASN-GW Relocation ACK message, the switching source ASN-GW 351 1 starts the CSN Anchored Mobility Management process (step 211).
  • the CSN Anchored Mobility Management process here is performed when the mobile terminal 37 performs communication via the BS 36, the switching destination ASN-GW 35 2 , the switching source ASN-GW 35 1 , and the HA 33.
  • 37 is a process for shifting to a state in which communication is performed via the BS 36, the ASN-GW 35 2 , and the HA 33.
  • the mobile terminal 37 is communicating via the HA 33, ASN-GW 35 2 , and BS 36.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

Un système de communication sans fil comprend : un dispositif de station de base connecté à un terminal mobile grâce à un canal sans fil ; et une pluralité de routeurs d’accès connectés au terminal mobile via le dispositif de station de base et possédant une fonction servant à contrôler le terminal mobile. Lorsqu’une requête est générée pour commuter le routeur d’accès de destination de connexion du terminal mobile d’un routeur à un autre, le dispositif de station de base connecté au terminal mobile est relié au routeur d’accès connecté au terminal mobile via le dispositif de station de base. Ainsi, la destination de connexion du terminal mobile peut être commutée dudit routeur d’accès à un autre routeur d’accès sans commuter le dispositif de station de base.
PCT/JP2009/067479 2008-10-28 2009-10-07 Système de communication sans fil, dispositif de contrôle d’un chemin de données, et procédé de contrôle d’un chemin de données WO2010050346A1 (fr)

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JP2008-276784 2008-10-28
JP2008276784 2008-10-28

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Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02108354A (ja) * 1988-10-18 1990-04-20 Nippon Telegr & Teleph Corp <Ntt> 交換処理代行方式
JPH08340380A (ja) * 1995-06-13 1996-12-24 N T T Ido Tsushinmo Kk 移動通信網システム
JPH1127725A (ja) * 1997-06-30 1999-01-29 Oki Tsushin Syst Kk 交換システム
JP2002007238A (ja) * 2000-06-21 2002-01-11 Nec Corp 移動通信システム及びそのゲートウェイ選択方法
JP2003304573A (ja) * 2002-02-08 2003-10-24 Ntt Docomo Inc 通信システム、通信装置、通信方法
JP2008141374A (ja) * 2006-11-30 2008-06-19 Fujitsu Ltd 無線通信ネットワークにおけるリロケーション制御装置
JP2008187252A (ja) * 2007-01-26 2008-08-14 Mitsubishi Electric Corp パケット送信制御方法および基地局
JP2008236037A (ja) * 2007-03-16 2008-10-02 Nec Corp 無線ネットワークシステム

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02108354A (ja) * 1988-10-18 1990-04-20 Nippon Telegr & Teleph Corp <Ntt> 交換処理代行方式
JPH08340380A (ja) * 1995-06-13 1996-12-24 N T T Ido Tsushinmo Kk 移動通信網システム
JPH1127725A (ja) * 1997-06-30 1999-01-29 Oki Tsushin Syst Kk 交換システム
JP2002007238A (ja) * 2000-06-21 2002-01-11 Nec Corp 移動通信システム及びそのゲートウェイ選択方法
JP2003304573A (ja) * 2002-02-08 2003-10-24 Ntt Docomo Inc 通信システム、通信装置、通信方法
JP2008141374A (ja) * 2006-11-30 2008-06-19 Fujitsu Ltd 無線通信ネットワークにおけるリロケーション制御装置
JP2008187252A (ja) * 2007-01-26 2008-08-14 Mitsubishi Electric Corp パケット送信制御方法および基地局
JP2008236037A (ja) * 2007-03-16 2008-10-02 Nec Corp 無線ネットワークシステム

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