WO2014049909A1 - 無線アクセスネットワーク装置、移動通信システム、通信方法、およびプログラムが格納された非一時的なコンピュータ可読媒体 - Google Patents
無線アクセスネットワーク装置、移動通信システム、通信方法、およびプログラムが格納された非一時的なコンピュータ可読媒体 Download PDFInfo
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- WO2014049909A1 WO2014049909A1 PCT/JP2013/003054 JP2013003054W WO2014049909A1 WO 2014049909 A1 WO2014049909 A1 WO 2014049909A1 JP 2013003054 W JP2013003054 W JP 2013003054W WO 2014049909 A1 WO2014049909 A1 WO 2014049909A1
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- control connection
- radio control
- connection setting
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W76/00—Connection management
- H04W76/10—Connection setup
- H04W76/11—Allocation or use of connection identifiers
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W12/00—Security arrangements; Authentication; Protecting privacy or anonymity
- H04W12/12—Detection or prevention of fraud
- H04W12/121—Wireless intrusion detection systems [WIDS]; Wireless intrusion prevention systems [WIPS]
- H04W12/122—Counter-measures against attacks; Protection against rogue devices
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W12/00—Security arrangements; Authentication; Protecting privacy or anonymity
- H04W12/12—Detection or prevention of fraud
- H04W12/125—Protection against power exhaustion attacks
Definitions
- the present invention relates to a radio access network device, a mobile communication system, a communication method, and a non-transitory computer-readable medium storing a program.
- DoS denial of service
- countermeasures in the case of a DoS attack have begun to be studied even in wireless networks (Patent Document 1).
- a mobile communication system of LTE Long Term Evolution
- 3GPP Third Generation Partnership Project
- UE User Equipment
- UE eNB evolved (Node B)
- Node B Node B
- RRC Radio Resource Control
- FIG. 8 is a sequence diagram of an RRC message transmitted / received between the UE 100 and the eNB 200 when establishing a radio control connection.
- the UE 100 transmits an RRC Connection Request message that is a radio control connection request signal to the eNB 200 (S100).
- the eNB 200 transmits an RRC Connection Setup message, which is a radio control connection setting signal, to the UE 100 (S101).
- UE100 which received this transmits the RRC Connection Setup Complete message which is a radio control connection setting completion signal (S102).
- E-UTRA Evolved Universal Terrestrial Radio Access
- RRC Radio Resource Control
- Protocol specification [3GPP TS36.331 V10.4.0]
- the eNB 200 needs to allocate a storage area for storing context information (UE Context), which is information necessary for communicating with the UE 100, to the memory.
- UE Context context information
- the malicious UE 120 transmits the RRC Connection Request (S200, S203), but does not respond to the RRC Connection Setup (S202, S205) transmitted from the eNB 200, thereby normalizing the sequence.
- a DoS attack is repeated in which operations that are not completed are repeated one after another.
- UE Context storage areas in the eNB 200 are allocated one after another (S201, S204), and eventually the UE Context storage area is depleted (S206). For this reason, even if normal UE110 transmits RRC Connection Request (S207), eNB200 cannot allocate UE Context preservation
- an object of the present invention is to provide a wireless access network device, a mobile communication system, a communication method, and a non-transitory computer-readable medium storing a program that are not easily affected by such a DoS attack.
- a radio access network device comprises: First receiving means for receiving a radio control connection setting request signal transmitted by a mobile station establishing a radio control connection; First transmission means for transmitting a radio control connection setting signal to the mobile station that has transmitted the radio control connection setting request signal; Second receiving means for receiving a radio control connection setting completion signal transmitted by the mobile station that has received the radio control connection setting signal; An allocation means for allocating a storage area in a memory for storing context information necessary for communication with the mobile station when the radio control connection setting completion signal is received; Is provided.
- the communication method comprises: Receive a radio control connection setting request signal transmitted by a mobile station that establishes a radio control connection with a radio access network device, Transmitting a radio control connection setting signal to the mobile station that has transmitted the radio control connection setting request signal, The mobile station that has received the radio control connection setting signal has transmitted a radio control connection setting completion signal, When the wireless control connection setting completion signal is received, a storage area for storing context information necessary for communication with the mobile station is allocated to the memory. Is.
- a non-transitory computer readable medium storing a program according to the present invention includes: Processing for receiving a radio control connection setting request signal transmitted by the mobile station; A process of transmitting a radio control connection setting signal to the mobile station that has transmitted the radio control connection setting request signal; A process of receiving a radio control connection setting completion signal transmitted by the mobile station that has received the radio control connection setting signal; When receiving the radio control connection setting completion signal, a process of allocating a memory area for storing context information necessary for communication with the mobile station to a memory; Stores a program for causing a computer to execute the program.
- a mobile communication system comprises: A mobile communication system comprising: a mobile station; and a radio access network device that establishes a radio control connection between the mobile station,
- the radio access network device is: First receiving means for receiving a radio control connection setting request signal transmitted by the mobile station; First transmission means for transmitting a radio control connection setting signal to the mobile station that has transmitted the radio control connection setting request signal; Second receiving means for receiving a radio control connection setting completion signal transmitted by the mobile station that has received the radio control connection setting signal; An allocation means for allocating a storage area in a memory for storing context information necessary for communication with the mobile station when the wireless control connection setting completion signal is received;
- the mobile station Second transmission means for transmitting the radio control connection setting request signal to the radio access network device; Third receiving means for receiving the radio control connection setting signal from the radio access network device; Third transmission means for transmitting the radio control connection setting completion signal to the radio access network device; Is provided.
- the communication method comprises: A communication method by a mobile communication system having a mobile station and a radio access network device that establishes a radio control connection between the mobile station,
- the mobile station transmits a radio control connection setting request signal to the radio access network device
- the radio access network device transmits a radio control connection setting signal to the mobile station that has transmitted the radio control connection setting request signal
- the mobile station that has received the radio control connection setting signal transmits a radio control connection setting completion signal to the radio access network device
- the radio access network apparatus that has received the radio control connection setting completion signal allocates a memory area for storing context information necessary for communication with the mobile station in a memory, Communication method.
- the radio access network apparatus runs out of memory even when a malicious mobile station sends a large amount of radio control connection request signals and performs a DoS attack that does not complete the radio control connection setting sequence normally. Thus, a normal mobile station does not become unable to communicate. Therefore, it is possible to provide a wireless access network device, a mobile communication system, a communication method, and a non-transitory computer-readable medium storing a program that are not easily affected by a DoS attack.
- FIG. 1 is a diagram illustrating an example of a configuration according to the first embodiment.
- the mobile communication system according to the first embodiment includes a mobile station 10 and a radio access network device 20 that establishes a radio control connection between the mobile station 10.
- the mobile station 10 includes a second transmitter 11 that transmits a radio control connection request signal to the radio access network device 20, a third receiver 12 that receives a radio control connection setting signal from the radio access network device 20, and A third transmitter 13 is provided that transmits a radio control connection setting completion signal to the radio access network device 20.
- the radio access network device 20 includes a first receiver 21 that receives a radio control connection request signal from the mobile station 10, a first transmitter 22 that transmits a radio control connection setting signal to the mobile station 10, and the mobile station 10. A second receiving unit 23 for receiving a wireless control connection setting completion signal from the first receiving unit 23. Also, the radio access network device 20 allocates to the memory 24 and a storage area for storing context information necessary for communication with the mobile station 10 when the radio control connection setting completion signal is received from the mobile station 10. An allocation unit 25 is provided.
- FIG. 2 is a sequence diagram illustrating an example of an operation according to the first embodiment.
- the operations of the mobile station 10 and the radio access network apparatus 20 will be described with reference to FIG.
- the mobile station 10 transmits a radio control connection request signal to the radio access network device 20 (S20).
- the radio access network device 20 that has received the radio control connection request signal transmits a radio control connection setting signal to the mobile station 10 (S21).
- the mobile station 10 that has received the radio control connection setting signal transmits a radio control connection setting completion signal to the radio access network device 20 (S22).
- the radio access network device 20 that has received the radio control connection setting completion signal determines that the mobile station 10 is not a malicious mobile station because the operation of S22 has been performed normally, and is necessary for communication with the mobile station 10.
- a storage area for storing the context information is allocated to the memory 24 (S23).
- the radio access network apparatus After receiving the radio control connection setting completion signal, the radio access network apparatus according to the present embodiment allocates an area for storing context information necessary for communication with the mobile station to the memory. Therefore, even if a malicious mobile station sends a large amount of radio control connection request signals and performs a DoS attack that does not complete the radio control connection setting sequence normally, the memory is exhausted and the normal mobile station communicates. It will not be impossible.
- FIG. 4 is a diagram illustrating an example of the configuration of the eNB 200 according to the second embodiment.
- the eNB 200 includes a signal reception unit 210, a call control unit 220, a signal transmission unit 230, and a memory 240.
- the signal receiving unit 210 receives a message format control signal from the UE 100 or the core network 300.
- the signal transmission unit 230 transmits a message format control signal to the UE 100 or the core network 300.
- the call control unit 220 can perform various types of call control processing required by the eNB 200 based on the control signal received by the signal reception unit 210, and the signal transmission unit 230 can transmit an appropriate control signal based on the processing. To control. When the call control unit 220 performs a call control operation, the call control unit 220 accesses various types of information stored in the memory 240.
- the memory 240 includes a UE Context storage area 241 and UE Context management information 242.
- the UE Context storage area 241 is an area for storing the UE Context, which is information necessary for communication with the UE 100, for each UE, and is an area for a plurality of UEs according to the cell radius or the like (N in FIG. 4). ) Exists. Examples of information elements for each UE stored in the UE Context storage area 241 include the UE number, call state, radio section resources assigned to the UE (hereinafter referred to as UL individual resources), and transmission / reception in the past. Can give information. The size of the area for one UE in the UE Context storage area 241 is, for example, about 50 kilobytes.
- UE Context management information 242 is information for managing the usage state of the UE Context storage area 241. Since the UE Context is information necessary for communication with the UE, when the eNB 200 receives a call from the UE, the eNB 200 allocates an area for the UE to the UE Context storage area 241 using the UE Context management information 242, and performs communication. The block management is performed so that the area is not released until the process is completed.
- FIG. 5 is a sequence diagram illustrating an example of an operation according to the second embodiment.
- the operations of the UE 100 and the eNB 200 will be described with reference to FIG.
- the UE 100 transmits an RRC Connection Request message that is a radio control connection request signal to the eNB 200. Details of RRC Connection Request are described in Non-Patent Document 1.
- the RRC Connection Request includes an InitialUE-Identity that is identification information of a mobile station and an information element of Establishment Cause that is information of a connection setting factor.
- the eNB 200 transmits an RRC Connection Setup message that is a radio control connection setting signal to the UE 100. Details of RRC Connection Setup are described in Non-Patent Document 1.
- the UE Context storage area is not allocated on the memory between S301 and S302.
- InitialUE-Identity and EstablishmentCause information elements are information elements necessary for communication between the eNB 200 and the core network node. Therefore, normally, after S301, the eNB 200 desirably allocates a UE Context storage area in which these information elements can be stored on the memory.
- the UL individual resource that needs to be notified to the UE by the RRC Connection Setup message is determined after S301 and stored in the UL Context storage area.
- the UE Context storage area is not allocated on the memory between S301 and S302 in order to protect against DoS attacks. Therefore, in the invention according to the present embodiment, the eNB 200 transmits an RRC Connection Setup message that does not set a UL individual resource.
- the UE 100 transmits an RRC Connection Setup Complete message that is a radio control connection setting completion signal to the eNB 200. Details of RRC Connection Setup Complete are described in Non-Patent Document 1. In the invention according to the present embodiment, as shown in FIG. 6, it is proposed to add InitialUE-Identity and EstablishmentCause that are not described in Non-Patent Document 1 to the information element of RRC Connection Setup Complete. As described above, in S302, the eNB 200 transmits an RRC Connection Setup message that does not set the UL individual resource in the UE 100. Therefore, in S303, UE100 transmits RRC Connection Setup Complete using Randam Access procedure to eNB200.
- the eNB 200 determines that the UE 100 is not a malicious user performing a DoS attack at this time, and refers to the UE Context management information 242, and allocates an area for the UE to the UE Context storage area 241. In addition, after the allocation, the UE context management information 242 is updated.
- the eNB 200 transmits a Security Mode Command message to the UE 100.
- the eNB 200 transmits an RRC Connection Reconfiguration message to the UE 100. Since these operations are well known to those skilled in the art, a description thereof will be omitted.
- the eNB after receiving the RRC Connection Setup Complete, the eNB according to the second embodiment allocates an area for storing the UE Context to the memory. By doing so, the eNB can perform a call control operation without depleting the UE Context storage area even when a malicious UE receives a DoS attack that does not respond to the RRC Connection Setup while transmitting a large number of RRC Connection Requests. And other services can be continued.
- the present invention is applied to the LTE mobile communication system shown in FIG. 3, but the present invention may be applied to a 3G (Third Generation) mobile communication system.
- 3G Third Generation
- FIG. 7 is a diagram showing a configuration of a 3G mobile communication system defined by 3GPP.
- the 3G mobile communication system includes a UE 100, an NB (Node B) 400, an RNC (Radio Network Controller) 500, and a core network 300.
- NB Node B
- RNC Radio Network Controller
- the present invention has been described as a hardware configuration, but the present invention is not limited to this.
- the present invention can also realize each process in the radio access network device 20 by causing a CPU (Central Processing Unit) to execute a computer program.
- the above-described program can be stored using various types of non-transitory computer readable media and supplied to a computer.
- Non-transitory computer readable media include various types of tangible storage media.
- non-transitory computer-readable media examples include magnetic recording media (eg, flexible disks, magnetic tapes, hard disk drives), magneto-optical recording media (eg, magneto-optical disks), CD-ROM (Read Only Memory) CD-R, CD -R / W, including semiconductor memory (for example, mask ROM, PROM (Programmable ROM), EPROM (Erasable PROM), flash ROM, RAM (Random Access Memory)).
- the program may be supplied to the computer by various types of temporary computer readable media. Examples of transitory computer readable media include electrical signals, optical signals, and electromagnetic waves.
- the temporary computer-readable medium can supply the program to the computer via a wired communication path such as an electric wire and an optical fiber, or a wireless communication path.
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Description
無線制御コネクションを確立する移動局が送信した無線制御コネクション設定要求信号を受信する第1の受信手段と、
前記無線制御コネクション設定要求信号を送信した前記移動局に、無線制御コネクション設定信号を送信する第1の送信手段と、
前記無線制御コネクション設定信号を受信した前記移動局が送信した、無線制御コネクション設定完了信号を受信する第2の受信手段と、
前記無線制御コネクション設定完了信号を受信したとき、前記移動局との通信に必要なコンテキスト情報を保存するための記憶エリアをメモリに割り当てる割当手段と、
を備える。
無線アクセスネットワーク装置との間で無線制御コネクションを確立する移動局が送信した無線制御コネクション設定要求信号を受信し、
前記無線制御コネクション設定要求信号を送信した前記移動局に、無線制御コネクション設定信号を送信し、
前記無線制御コネクション設定信号を受信した前記移動局が送信した、無線制御コネクション設定完了信号を受信し、
前記無線制御コネクション設定完了信号を受信したとき、前記移動局との通信に必要なコンテキスト情報を保存するための記憶エリアをメモリに割り当てる、
ものである。
移動局が送信した無線制御コネクション設定要求信号を受信する処理と、
前記無線制御コネクション設定要求信号を送信した前記移動局に、無線制御コネクション設定信号を送信する処理と、
前記無線制御コネクション設定信号を受信した前記移動局が送信した、無線制御コネクション設定完了信号を受信する処理と、
前記無線制御コネクション設定完了信号を受信したとき、前記移動局との通信に必要なコンテキスト情報を保存するための記憶エリアをメモリに割り当てる処理と、
をコンピュータに実行させるプログラムが格納されたものである。
移動局と、前記移動局との間で無線制御コネクションを確立する無線アクセスネットワーク装置と、を有する移動通信システムであって、
前記無線アクセスネットワーク装置は、
前記移動局が送信した無線制御コネクション設定要求信号を受信する第1の受信手段と、
前記無線制御コネクション設定要求信号を送信した前記移動局に、無線制御コネクション設定信号を送信する第1の送信手段と、
前記無線制御コネクション設定信号を受信した前記移動局が送信した、無線制御コネクション設定完了信号を受信する第2の受信手段と、
前記無線制御コネクション設定完了信号を受信したとき、前記移動局との通信に必要なコンテキスト情報を保存するための記憶エリアをメモリに割り当てる割当手段と、を備え、
前記移動局は、
前記無線アクセスネットワーク装置に、前記無線制御コネクション設定要求信号を送信する第2の送信手段と、
前記無線アクセスネットワーク装置から、前記無線制御コネクション設定信号を受信する第3の受信手段と、
前記無線アクセスネットワーク装置に、前記無線制御コネクション設定完了信号を送信する第3の送信手段と、
を備える。
移動局と、前記移動局との間で無線制御コネクションを確立する無線アクセスネットワーク装置と、を有する移動通信システムによる通信方法であって、
前記移動局が、前記無線アクセスネットワーク装置に、無線制御コネクション設定要求信号を送信し、
前記無線アクセスネットワーク装置が、前記無線制御コネクション設定要求信号を送信した前記移動局に、無線制御コネクション設定信号を送信し、
前記無線制御コネクション設定信号を受信した前記移動局が、前記無線アクセスネットワーク装置に、無線制御コネクション設定完了信号を送信し、
前記無線制御コネクション設定完了信号を受信した前記無線アクセスネットワーク装置が、前記移動局との通信に必要なコンテキスト情報を保存するための記憶エリアをメモリに割り当てる、
通信方法。
[構成]
図1は、第1の実施形態による構成の一例を示した図である。第1の実施形態による移動通信システムは、移動局10と、移動局10との間で無線制御コネクションを確立する無線アクセスネットワーク装置20から構成される。
図2は、第1の実施形態による動作の一例を示すシーケンス図である。以下、図2を参照しながら、移動局10および無線アクセスネットワーク装置20の動作を説明する。
上記の通り、本実施形態にかかる無線アクセスネットワーク装置は、無線制御コネクション設定完了信号を受信した後に、移動局との通信に必要なコンテキスト情報を保存するためのエリアをメモリに割り当てる。そのため、悪意の移動局が無線制御コネクション要求信号を大量に送信して無線制御コネクションの設定シーケンスを正常に完了させないDoS攻撃をした場合であっても、メモリが枯渇して通常の移動局が通信できなくなることはない。
[構成]
第2の実施形態は、第1の実施形態にかかる発明を、図3に示すLTEの無線通信システムに適用した実施形態である。図3を参照すると、第2の実施形態による移動通信システムは、UE100、eNB200、およびコアネットワーク300を有する。以下、本発明の主要な構成要素であるeNB200の構成の詳細について図を参照しながら説明する。
図5は、第2の実施形態による動作の一例を示すシーケンス図である。以下、図5を参照しながら、UE100およびeNB200の動作を説明する。
上記の通り、第2の実施形態にかかるeNBは、RRC Connection Setup Complete受信後に、UE Contextを保存するためのエリアをメモリに割り当てる。こうすることにより、eNBは、悪意あるUEがRRC Connection Requestを大量に送信しつつRRC Connection Setupには応答しないDoS攻撃を受けた場合でも、UE Contextの保存エリアが枯渇することなく、呼制御動作をはじめとするサービスを継続することができる。
11 第2の送信部
12 第3の受信部
13 第3の送信部
20 無線アクセスネットワーク装置
21 第1の受信部
22 第1の送信部
23 第2の受信部
24 メモリ
25 割当部
100 UE
110 通常のUE
120 悪意のUE
200 eNB
210 信号受信部
220 呼制御部
230 信号送信部
240 メモリ
241 UE Context保存エリア
242 UE Context管理情報
300 コアネットワーク
400 NB
500 RNC
Claims (9)
- 無線制御コネクションを確立する移動局が送信した無線制御コネクション設定要求信号を受信する第1の受信手段と、
前記無線制御コネクション設定要求信号を送信した前記移動局に、無線制御コネクション設定信号を送信する第1の送信手段と、
前記無線制御コネクション設定信号を受信した前記移動局が送信した、無線制御コネクション設定完了信号を受信する第2の受信手段と、
前記無線制御コネクション設定完了信号を受信したとき、前記移動局との通信に必要なコンテキスト情報を保存するための記憶エリアをメモリに割り当てる割当手段と、
を備える無線アクセスネットワーク装置。 - 前記無線制御コネクション設定完了信号は、前記移動局の識別情報とコネクション設定要因の情報を含む、
請求項1に記載の無線アクセスネットワーク装置。 - 前記移動局は、UE(User Equipment)であって、
前記無線アクセスネットワーク装置は、eNB(evolved Node B)であって、
前記無線制御コネクション要求信号は、RRC Connection Requestメッセージであって、
前記無線制御コネクション設定信号は、RRC Connection Setupメッセージであって、
前記無線制御コネクション設定完了信号は、RRC Connection Setup Completeメッセージである、
請求項2に記載の無線アクセスネットワーク装置。 - 前記移動局は、UE(User Equipment)であって、
前記無線アクセスネットワーク装置は、RNC(Radio Network Controller)であって、
前記無線制御コネクション要求信号は、RRC Connection Requestメッセージであって、
前記無線制御コネクション設定信号は、RRC Connection Setupメッセージであって、
前記無線制御コネクション設定完了信号は、RRC Connection Setup Completeメッセージである、
請求項2に記載の無線アクセスネットワーク装置。 - 前記移動局の識別情報はInitialUE-Identityであって、前記コネクション設定要因の情報はEstablishmentCauseである、
請求項3または4に記載の無線アクセスネットワーク装置。 - 無線アクセスネットワーク装置との間で無線制御コネクションを確立する移動局が送信した無線制御コネクション設定要求信号を受信し、
前記無線制御コネクション設定要求信号を送信した前記移動局に、無線制御コネクション設定信号を送信し、
前記無線制御コネクション設定信号を受信した前記移動局が送信した、無線制御コネクション設定完了信号を受信し、
前記無線制御コネクション設定完了信号を受信したとき、前記移動局との通信に必要なコンテキスト情報を保存するための記憶エリアをメモリに割り当てる、
通信方法。 - 移動局が送信した無線制御コネクション設定要求信号を受信する処理と、
前記無線制御コネクション設定要求信号を送信した前記移動局に、無線制御コネクション設定信号を送信する処理と、
前記無線制御コネクション設定信号を受信した前記移動局が送信した、無線制御コネクション設定完了信号を受信する処理と、
前記無線制御コネクション設定完了信号を受信したとき、前記移動局との通信に必要なコンテキスト情報を保存するための記憶エリアをメモリに割り当てる処理と、
をコンピュータに実行させるプログラムが格納された非一時的なコンピュータ可読媒体。 - 移動局と、前記移動局との間で無線制御コネクションを確立する無線アクセスネットワーク装置と、を有し、
前記無線アクセスネットワーク装置は、
前記移動局が送信した無線制御コネクション設定要求信号を受信する第1の受信手段と、
前記無線制御コネクション設定要求信号を送信した前記移動局に、無線制御コネクション設定信号を送信する第1の送信手段と、
前記無線制御コネクション設定信号を受信した前記移動局が送信した、無線制御コネクション設定完了信号を受信する第2の受信手段と、
前記無線制御コネクション設定完了信号を受信したとき、前記移動局との通信に必要なコンテキスト情報を保存するための記憶エリアをメモリに割り当てる割当手段と、を備え、
前記移動局は、
前記無線アクセスネットワーク装置に、前記無線制御コネクション設定要求信号を送信する第2の送信手段と、
前記無線アクセスネットワーク装置から、前記無線制御コネクション設定信号を受信する第3の受信手段と、
前記無線アクセスネットワーク装置に、前記無線制御コネクション設定完了信号を送信する第3の送信手段と、
を備える移動通信システム。 - 移動局と、前記移動局との間で無線制御コネクションを確立する無線アクセスネットワーク装置と、を有する移動通信システムによる通信方法であって、
前記移動局が、前記無線アクセスネットワーク装置に、無線制御コネクション設定要求信号を送信し、
前記無線アクセスネットワーク装置が、前記無線制御コネクション設定要求信号を送信した前記移動局に、無線制御コネクション設定信号を送信し、
前記無線制御コネクション設定信号を受信した前記移動局が、前記無線アクセスネットワーク装置に、無線制御コネクション設定完了信号を送信し、
前記無線制御コネクション設定完了信号を受信した前記無線アクセスネットワーク装置が、前記移動局との通信に必要なコンテキスト情報を保存するための記憶エリアをメモリに割り当てる、
通信方法。
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| JP2014538090A JP5888426B2 (ja) | 2012-09-28 | 2013-05-13 | 無線アクセスネットワーク装置、移動通信システム、通信方法、およびプログラム |
| US14/429,579 US20150334572A1 (en) | 2012-09-28 | 2013-05-13 | Radio access network apparatus, mobile communication system, communication method, and non-transitory computer readable medium storing program |
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| WO2017064824A1 (ja) * | 2015-10-15 | 2017-04-20 | 日本電気株式会社 | 監視装置、基地局、監視方法、制御方法、及び非一時的なコンピュータ可読媒体 |
| JPWO2017064824A1 (ja) * | 2015-10-15 | 2018-08-02 | 日本電気株式会社 | 監視装置、基地局、監視方法、制御方法、及び非一時的なコンピュータ可読媒体 |
| JP2020174391A (ja) * | 2015-10-15 | 2020-10-22 | 日本電気株式会社 | 制御装置、ネットワーク管理装置、制御方法、及びネットワーク管理方法 |
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