WO2020012658A1 - Dispositif de station de base, système de communication sans fil et procédé d'acquisition de données d'authentification - Google Patents

Dispositif de station de base, système de communication sans fil et procédé d'acquisition de données d'authentification Download PDF

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Publication number
WO2020012658A1
WO2020012658A1 PCT/JP2018/026601 JP2018026601W WO2020012658A1 WO 2020012658 A1 WO2020012658 A1 WO 2020012658A1 JP 2018026601 W JP2018026601 W JP 2018026601W WO 2020012658 A1 WO2020012658 A1 WO 2020012658A1
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WIPO (PCT)
Prior art keywords
base station
authentication
terminal device
authentication data
unit
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PCT/JP2018/026601
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English (en)
Japanese (ja)
Inventor
哲哉 長谷川
岳大 藤井
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富士通株式会社
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Priority to PCT/JP2018/026601 priority Critical patent/WO2020012658A1/fr
Publication of WO2020012658A1 publication Critical patent/WO2020012658A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W12/00—Security arrangements; Authentication; Protecting privacy or anonymity
    • H04W12/06—Authentication
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W92/00—Interfaces specially adapted for wireless communication networks
    • H04W92/16—Interfaces between hierarchically similar devices
    • H04W92/20—Interfaces between hierarchically similar devices between access points
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/08—Reselecting an access point

Definitions

  • the present invention relates to a base station apparatus, a wireless communication system, and an authentication data acquisition method.
  • a terminal device such as a mobile phone or a smartphone wirelessly communicates with a base station device in a wireless communication system
  • authentication of the terminal device is performed.
  • a terminal device starts wireless communication
  • an RRC (Radio Resource Control) message is transmitted / received to / from a base station device.
  • An RRC connection is established.
  • the terminal device transmits an attach request for requesting registration to the wireless communication system
  • the attach request is transferred to the MME (Mobility Management Entity) which is a higher-order device via the base station device, and is transmitted from the MME to the terminal device. Transmission of identification information is requested.
  • the MME receives the identification information transmitted from the terminal device, refers to an HSS (Home Subscriber Server) that centrally manages a database of user information, and executes authentication of the terminal device.
  • HSS Home Subscriber Server
  • the database when the database is distributed in the base station device, not all user information is stored in the base station device. Processing may fail. That is, since each base station device holds, for example, only the user information near the area where the base station device is installed, for example, the identification information of the terminal device of the user coming from a remote place is held in the base station device. Not. For this reason, when such authentication processing of the terminal device is executed in the base station device, the terminal device is not authenticated and the authentication process fails.
  • the identification information of the terminal device is transmitted again to the higher-level device of the core network, and the higher-level device that holds all the user information performs the authentication process again.
  • the time required for the authentication process increases.
  • the authentication processing in the base station apparatus may fail. Can be reduced.
  • the time for matching the identification information becomes longer as in the case of the matching in the host device, and the time required for the authentication process eventually increases.
  • the disclosed technology has been made in view of such a point, and even when a database for an authentication process is distributed, a base station device, a wireless communication system, and authentication data capable of enabling quick authentication are provided.
  • the purpose is to provide an acquisition method.
  • a base station device disclosed in the present application includes a storage unit that holds an authentication database that stores authentication data used for authentication of a terminal device, and a first terminal device that is communicating with another base station device.
  • a storage control unit that receives the authentication data requested by the request unit and stores the authentication data in the storage unit.
  • the base station apparatus even when a database for the authentication processing is distributed and arranged, it is possible to quickly perform authentication. Play.
  • FIG. 1 is a diagram showing a configuration of the wireless communication system according to the first embodiment.
  • FIG. 2 is a diagram illustrating a specific example of the wireless communication system.
  • FIG. 3 is a block diagram showing a configuration of the base station apparatus according to Embodiment 1.
  • FIG. 4 is a flowchart showing an operation of the base station apparatus according to Embodiment 1.
  • FIG. 5 is a block diagram showing a configuration of the terminal device according to Embodiment 1.
  • FIG. 6 is a sequence diagram showing a handover process according to Embodiment 1.
  • FIG. 7 is a diagram illustrating a format example of a message of the X2 interface.
  • FIG. 8 is a diagram illustrating another format example of the message of the X2 interface.
  • FIG. 1 is a diagram showing a configuration of the wireless communication system according to the first embodiment.
  • FIG. 2 is a diagram illustrating a specific example of the wireless communication system.
  • FIG. 3 is a block diagram showing a configuration of the
  • FIG. 9 is a block diagram showing a configuration of a base station apparatus according to Embodiment 2.
  • FIG. 10 is a flowchart showing an operation of the base station apparatus according to Embodiment 2.
  • FIG. 11 is a sequence diagram showing a handover process according to the second embodiment.
  • FIG. 12 is a block diagram showing a configuration of a base station apparatus according to Embodiment 3.
  • FIG. 13 is a flowchart showing an operation of the base station apparatus according to Embodiment 3.
  • FIG. 14 is a sequence diagram showing a handover process according to Embodiment 3.
  • FIG. 15 is a block diagram showing a configuration of a source base station according to Embodiment 4.
  • FIG. 16 is a block diagram showing a configuration of a target base station according to Embodiment 4.
  • FIG. 17 is a flowchart showing an operation of the target base station according to Embodiment 4.
  • FIG. 18 is a sequence diagram showing a handover process according to Embodiment 4.
  • FIG. 19 is a diagram showing another example of the format of the message of the X2 interface.
  • FIG. 1 is a diagram showing a configuration of the wireless communication system according to the first embodiment.
  • the wireless communication system includes a plurality of base station devices 100a to 100f.
  • Each of the base station devices 100a to 100f includes authentication data including a terminal ID of a terminal device to which wireless communication is permitted. (Hereinafter referred to as “authentication database”) are distributed. That is, the base station apparatuses 100a to 100c hold an authentication database DB # 1, and the base station apparatuses 100d to 100f hold an authentication database DB # 2.
  • the authentication database DB # 1 stores, for example, authentication data of terminal devices registered in the area where the base station devices 100a to 100c are located, and the authentication database DB # 2 includes, for example, the base station devices 100d to 100f.
  • the authentication data of the terminal device registered in the area is stored. Therefore, for example, when a terminal device registered in the area where the base station devices 100a to 100c are located starts wireless communication with the base station device 100a, the base station device 100a acquires the terminal ID of the terminal device. The terminal ID is searched in the authentication database DB # 1. Since the authentication database DB # 1 stores only the terminal IDs of the terminal devices registered in the area where the base station devices 100a to 100c are located, the base station device 100a can store the terminal devices in a relatively short time. Authentication can be successful.
  • the base station device 100d acquires the terminal ID of the terminal device, and stores the terminal ID in the authentication database DB # 2. Search in. Since the authentication database DB # 2 stores only the terminal IDs of the terminal devices registered in the area where the base station devices 100d to 100f are located, the terminal IDs of the terminal devices that have moved are not stored. However, the authentication of the terminal device does not succeed. Thus, in the present embodiment, when a terminal device performs a handover, the terminal ID of the terminal device is transferred from the handover source base station device to the handover destination base station device.
  • the terminal device when the terminal device performs a handover from the base station device 100a to the base station device 100d, the terminal ID of the terminal device is transferred from the base station device 100a to the base station device 100d.
  • the terminal device performs a handover between the base station devices holding different authentication databases.
  • FIG. 2 is a diagram showing a specific example of a wireless communication system.
  • the base station device 100 forms a cell that is an area where wireless communication is possible, and the terminal device 200 performs wireless communication with the base station device 100 of the cell where the base station is located.
  • the two base station devices 100 shown in FIG. 2 correspond to, for example, the above-described base station device 100a and base station device 100d.
  • the terminal device 200 transmits identification information such as a terminal ID for identifying the terminal device 200 to the base station device 100, and the base station device 100 performs an authentication process using the received terminal ID.
  • the base station device 100 holds an authentication database that stores the terminal ID of the terminal device to which wireless communication is permitted, and when receiving the terminal ID from the terminal device 200 in the cell, the received terminal ID is stored in the database. Collate.
  • the terminal ID is stored in the database, the authentication of the terminal device 200 is successful, and the registration of the terminal device 200 in the wireless communication system is permitted.
  • the terminal device 200 transmits a terminal ID to the base station device 100 when starting wireless communication, and when the wireless communication is started, periodically measures the radio quality with the base station device 100, and Report to the device 100. Then, when receiving from the currently communicating base station apparatus 100 a handover instruction for switching the communication partner to another base station apparatus 100, the terminal apparatus 200 performs handover to the instructed other base station apparatus 100.
  • the handover source base station apparatus 100 may be referred to as a “source base station”
  • the handover destination base station apparatus 100 may be referred to as a “target base station”.
  • FIG. 3 is a block diagram showing a configuration of base station apparatus 100 according to Embodiment 1.
  • FIG. 3 shows a configuration of base station apparatus 100 as a target base station.
  • the base station device 100 illustrated in FIG. 3 includes a wired interface unit (hereinafter abbreviated as “wired I / F unit”) 110, a processor 120, a memory 130, and a wireless communication unit 140.
  • wired I / F unit wired interface unit
  • the wired I / F unit 110 has an interface connected to another base station device 100, and transmits and receives data to and from the other base station device 100.
  • the wired I / F unit 110 issues a handover request (hereinafter abbreviated as “HO request”) for requesting the terminal device 200 to be a handover destination. Receive from.
  • the wired I / F unit 110 transmits an authentication data request for requesting authentication data used for authentication of the terminal device 200 to the source base station, and transmits the authentication data to the source base station.
  • the wired I / F unit 110 may have an interface for connecting to a higher-level device of the core network.
  • the processor 120 includes, for example, a CPU (Central Processing Unit), an FPGA (Field Programmable Gate Array) or a DSP (Digital Signal Processor), and controls the entire base station apparatus 100.
  • the processor 120 includes an HO request acquisition unit 121, a handover processing unit (hereinafter abbreviated as “HO processing unit”) 122, an authentication data search unit 123, an authentication data request unit 124, and a storage control unit 125.
  • HO processing unit processing units related to the function as the target base station are illustrated, and other processing units are not illustrated.
  • HO request acquisition section 121 acquires the HO request transmitted from the source base station and received by wired I / F section 110.
  • the HO request is transmitted from the source base station to the target base station when the radio quality between the source base station and the target base station is reduced as a result of the terminal apparatus 200 measuring the radio quality. Sent to base station.
  • the HO request includes the terminal ID of the terminal device 200 to be handed over.
  • the HO request acquisition unit 121 outputs the acquired HO request to the HO processing unit 122, and outputs the terminal ID to the authentication data search unit 123 when the HO request includes the terminal ID.
  • the HO processing unit 122 executes a handover process when the HO request is output from the HO request acquisition unit 121. Specifically, HO processing section 122 determines whether or not to permit handover of terminal apparatus 200, generates a handover response including the determination result, and transmits the generated handover response from wired I / F section 110 to the source base station.
  • the authentication data search unit 123 searches the memory 130 for authentication data corresponding to the terminal ID. That is, the authentication data search unit 123 determines whether or not the authentication data of the terminal device 200 to be handed over is already stored in the base station device 100. As will be described later, the memory 130 stores in advance a database of authentication data (hereinafter referred to as an “authentication database”) that is distributed and arranged in the base station device 100, and that the terminal device that has handed over to the base station device 100 in the past. Authentication data is stored. The authentication data search unit 123 searches for the terminal ID output from the HO request acquisition unit 121 in the authentication database and the authentication data of the terminal device that has been handed over in the past. Then, when the terminal ID of the terminal device 200 is not stored in the memory 130, the authentication data search unit 123 notifies the authentication data requesting unit 124 of the fact.
  • an authentication database a database of authentication data
  • the authentication data request unit 124 When notified by the authentication data search unit 123 that the terminal ID of the terminal device 200 to be handed over is not stored in the memory 130, the authentication data request unit 124 requests authentication data including the terminal ID of the terminal device 200. Generate an authentication data request. Then, the authentication data request unit 124 transmits an authentication data request from the wired I / F unit 110 to the source base station.
  • the storage control unit 125 acquires the authentication data and stores it in the memory 130. Specifically, the storage control unit 125 stores the acquired authentication data in the memory 130 separately from the authentication database.
  • the memory 130 includes, for example, a random access memory (RAM) or a read only memory (ROM), and stores information used by the processor 120 to execute processing. Specifically, the memory 130 stores an authentication database 131 and acquired authentication data 132.
  • RAM random access memory
  • ROM read only memory
  • the authentication database 131 is a database of authentication data that is distributed and arranged in advance in the base station device 100, and holds authentication data including terminal IDs of some terminal devices among all terminal devices subscribed to the wireless communication system. I do. Since the authentication data stored in the authentication database 131 is, for example, authentication data relating to terminal devices having a common registered area, the memory 130 of the neighboring base station device 100 may store the same authentication database 131. .
  • the acquired authentication data 132 holds the authentication data transmitted from the source base station and acquired by the storage control unit 125 when the terminal device performs handover. That is, the acquired authentication data 132 is authentication data relating to the terminal device that has been handed over in the past, and is not held in the authentication database 131.
  • the wireless communication unit 140 performs wireless transmission processing such as D / A (Digital / Analog) conversion and up-conversion on the transmission data generated by the processor 120, and wirelessly transmits the data via an antenna.
  • the wireless communication unit 140 performs wireless reception processing such as down-conversion and A / D (Analog / Digital) conversion on received data wirelessly received via the antenna, and outputs the data to the processor 120.
  • the radio quality between the terminal device 200 and the neighboring base station device 100 including the currently communicating source base station decreases, and the When the wireless quality during the period becomes good, the HO request is transmitted from the source base station to the target base station.
  • This HO request is received by the wired I / F unit 110 of the target base station (Step S101), and is acquired by the HO request acquisition unit 121.
  • the HO request acquisition unit 121 determines whether or not the HO request includes the terminal ID of the terminal device 200 to be handed over (step S102). If the terminal ID is included (step S102 Yes), the terminal ID is authenticated. The data is output to the data search unit 123. Then, the authentication data search unit 123 searches the authentication database 131 of the memory 130 or the obtained authentication data 132 for the terminal ID (step S103). The authentication data search unit 123 determines whether the terminal ID of the terminal device 200 to be handed over is stored in the authentication database 131 distributed in advance or the acquired authentication data 132 of the terminal device that has been handed over in the past. Is performed (step S104).
  • Step S104 No when the terminal ID is not stored in any of the authentication database 131 and the acquired authentication data 132 (Step S104 No), the authentication requesting the authentication data of the terminal device 200 is performed by the authentication data requesting unit 124. A data request is generated. Then, the authentication data request is transmitted from the wired I / F unit 110 to the source base station (step S105).
  • the source base station When the authentication data request is received by the source base station, the source base station transmits the authentication data of the terminal device 200 to be handed over to the target base station. Since the source base station has authenticated the terminal device 200 at the time of starting wireless communication with the terminal device 200 or obtained the authentication data for the terminal device 200 when the terminal device 200 has handed over from another base station device 100, 200 authentication data are stored. Therefore, the source base station always holds the authentication data regarding the terminal device 200, and transmits this authentication data in accordance with a request from the target base station.
  • the authentication data for the terminal device 200 is received by the wired I / F unit 110 of the target base station and acquired by the storage control unit 125. Then, the acquired authentication data is stored as acquired authentication data 132 by the storage control unit 125 (step S106). As a result, the authentication data that is not stored in the authentication database 131 and is related to the terminal device 200 that is to be handed over is stored in the memory 130.
  • the HO request obtained by the HO request obtaining unit 121 is output to the HO processing unit 122, and the HO processing unit 122 executes a handover process (step S107). Specifically, the HO processing unit 122 determines whether to permit the handover of the terminal device 200, and a handover response indicating the determination result is transmitted from the wired I / F unit 110 to the source base station. This handover process is also executed when the terminal ID is not included in the HO request (step S102 No) or when the authentication data relating to the terminal device 200 is stored in the memory 130 (step S104 Yes).
  • FIG. 5 is a block diagram showing a configuration of terminal device 200 according to Embodiment 1.
  • the terminal device 200 illustrated in FIG. 5 includes a wireless communication unit 210, a processor 220, and a memory 230.
  • the wireless communication unit 210 performs wireless reception processing such as down-conversion and A / D conversion on received data wirelessly received via the antenna, and outputs the data to the processor 220. In addition, the wireless communication unit 210 performs wireless transmission processing such as D / A conversion and up-conversion on transmission data generated by the processor 220, and wirelessly transmits the data via an antenna.
  • the processor 220 includes, for example, a CPU, an FPGA, or a DSP, and controls the entire terminal device 200. Specifically, the processor 220 includes a call processing control unit 221, a wireless quality measurement unit 222, and a data communication processing unit 223.
  • the call processing control unit 221 controls call processing by transmitting and receiving various control information including connection with the base station apparatus 100. For example, when a handover is instructed from the source base station, the call processing control unit 221 disconnects the connection with the source base station and establishes a connection with the target base station.
  • Wireless quality measuring section 222 measures wireless quality with base station apparatus 100. Specifically, the radio quality measurement unit 222 periodically measures, for example, SIR (Signal to Interference Ratio) based on a signal received from the base station device 100. The radio quality measurement unit 222 measures radio quality with the source base station and also measures radio quality with the base station device 100 around the source base station. When the radio quality between the source base station and the terminal device 200 performs handover, the base station device 100 having good radio quality among the base station devices 100 around the source base station becomes the target base station. .
  • SIR Signal to Interference Ratio
  • the data communication processing unit 223 When the connection with the base station apparatus 100 is established by the call processing control unit 221, the data communication processing unit 223 generates transmission data by executing coding and modulation of transmission information.
  • the transmission information includes, for example, a measurement result of the radio quality by the radio quality measuring unit 222. Further, the data communication processing unit 223 obtains reception information by performing demodulation and decoding of the reception data.
  • the memory 230 includes, for example, a RAM or a ROM, and stores information used by the processor 220 to execute processing.
  • step S201 When the terminal device 200 starts wireless communication with the source base station 100a, an RRC message is transmitted and received (step S201), and a connection between the terminal device 200 and the source base station 100a is established.
  • the RRC message also includes the terminal ID of the terminal device 200, and the terminal device 200 is authenticated by collating the terminal ID in the authentication database held by the source base station 100a. That is, here, it is assumed that the authentication data including the terminal ID of the terminal device 200 is stored by the source base station 100a.
  • the terminal device 200 and the source base station 100a start wireless communication.
  • the wireless quality between the terminal device 200 and the source base station 100a is periodically measured by the wireless quality measurement unit 222 of the terminal device 200. You. Also, the radio quality between the terminal device 200 and the base station device 100 around the source base station 100a is measured. The measured radio quality with each base station device 100 is reported to the source base station 100a (step S202).
  • the source base station 100a determines whether or not a handover of the terminal device 200 is necessary, based on the radio quality reported from the terminal device 200. That is, when the radio quality between the terminal device 200 and the source base station 100a decreases and the radio quality between the terminal device 200 and the target base station 100b is good, the source base station 100a A decision is made to perform handover to the target base station 100b. Then, the source base station 100a transmits an HO request requesting handover of the terminal device 200 to the target base station 100b (Step S203). At this time, the source base station 100a transmits the terminal ID of the terminal device 200 by including it in the HO request.
  • the HO request including the terminal ID is received by the wired I / F unit 110 of the target base station 100b
  • the HO request is obtained by the HO request obtaining unit 121, and the terminal ID is output to the authentication data search unit 123.
  • the authentication data search unit 123 searches the authentication database 131 and the acquired authentication data 132 of the memory 130 for authentication data including the terminal ID (step S204).
  • the authentication databases held by the source base station 100a and the target base station 100b are different, and the terminal device 200 performs a handover to the target base station 100b for the first time. Therefore, the terminal ID of the terminal device 200 is stored in the memory 130 of the target base station 100b. It is assumed that it has not been stored.
  • an authentication data request is generated by the authentication data request unit 124 and transmitted to the source base station 100a (step S205).
  • the authentication data request may be transmitted by being included in a message of a C-plane (C-Plane) in an X2AP (X2 @ Application @ Protocol) layer, for example.
  • FIG. 7 shows an example of the format of such a message.
  • the information element name indicates the name of an information element that can be included in the message, and the presence indicates whether each information element is essential for the message.
  • the identification information of the target base station 100b is stored in the information element "eNB1 @ Measurement @ ID", and the identification information of the source base station 100a is stored in the information element "eNB2 @ Measurement @ ID”. .
  • "authentication data” is stored in the information element "Report @ Characteristics”, which indicates that a request is made to report the authentication data.
  • the terminal ID of the terminal device 200 for which the authentication data is requested is stored in the information element “UE @ ID”.
  • the transmission method of the authentication data request is not limited to the above, and may be transmitted as a C-plane signal other than the X2AP layer, or may be transmitted as an OAM (Operation / Administration / Maintenance) signal.
  • the source base station 100a that has received the authentication data request transmits the authentication data including the terminal ID of the terminal device 200 to the target base station 100b (Step S206).
  • the authentication data may be transmitted by being included in, for example, a message of the C-plane of the X2AP layer, similarly to the above-described authentication data request.
  • FIG. 8 shows an example of the format of such a message.
  • the authentication data of the terminal device 200 specified in the authentication data request is stored in the item of “authentication data” of the information element “Cell @ Measurement @ Result”.
  • the method of transmitting the authentication data is not limited to the above, and may be transmitted as a C-plane signal other than the X2AP layer, or may be transmitted as an OAM signal.
  • the authentication data received by the target base station 100 is stored as the acquired authentication data 132 in the memory 130 by the storage control unit 125 of the target base station 100b.
  • the authentication of the terminal device 200 succeeds in a short time. That is, in the next authentication process, if the terminal ID of the terminal device 200 is compared with the authentication database 131 and the acquired authentication data 132, the authentication data including the terminal ID is held in the acquired authentication data 132. 200 authentications succeed. In other words, even when the database for the authentication process is distributed, it is possible to perform quick authentication.
  • the terminal device 200 when the terminal device 200 performs a handover, the terminal device 200 has already been authenticated by the source base station 100a. Therefore, when the HO request acquisition unit 121 acquires the HO request, the handover process is performed regardless of whether the authentication data including the terminal ID is stored in the memory 130. That is, the reason that the authentication data of the terminal device 200 is acquired from the source base station 100a and held in the memory 130 is for the authentication process when the terminal device 200 starts wireless communication with the target base station 100b from the next time. is there. Therefore, regardless of whether the authentication data is obtained from the source base station 100a, the HO processing unit 122 determines whether to permit the handover of the terminal device 200.
  • a handover response including the determination result by the HO processing unit 122 is transmitted to the source base station 100a (step S207). If the handover is permitted, a handover instruction is transmitted from the source base station 100a to the terminal device 200. Is performed (step S208). The terminal device 200 performs a handover to the target base station 100b according to the instruction from the source base station 100a, and sets the target base station 100b as a communication partner of the wireless communication (Step S209).
  • the target base station acquires authentication data for the terminal device from the source base station and stores the authentication data in the memory. Keep it. For this reason, in the authentication processing when the terminal device starts the wireless communication with the target base station next, the authentication data on the terminal device is stored in the memory of the target base station, and the authentication of the terminal device succeeds. In other words, even when a database for the authentication process is distributed in the base station device, it is possible to quickly perform authentication of the terminal device.
  • the acquired authentication data 132 that has been stored in the memory 130 and a predetermined time has elapsed may be deleted. Also, the acquired authentication data 132 that has passed a predetermined time since it was last used for authentication of the terminal device 200 may be deleted. By doing so, it is possible to prevent the storage area of the memory 130 from being squeezed by the acquired authentication data 132, and to use the memory 130 efficiently.
  • the feature of the second embodiment is that the authentication data acquired from the source base station is additionally registered in the authentication database of the target base station, and the authentication database is synchronized with another base station device holding the same authentication database as the target base station. It is a point to make it.
  • the configuration of the wireless communication system according to the second embodiment is the same as that of the first embodiment (FIGS. 1 and 2), and a description thereof is omitted. Further, the configuration of terminal apparatus 200 according to Embodiment 2 is the same as that of Embodiment 1 (FIG. 5), and a description thereof will not be repeated. Embodiment 2 is different from Embodiment 1 in the configuration of base station apparatus 100 as a target base station.
  • FIG. 9 is a block diagram showing a configuration of base station apparatus 100 according to Embodiment 2. 9, the same parts as those in FIG. 3 are denoted by the same reference numerals, and the description thereof will be omitted.
  • Base station apparatus 100 shown in FIG. 9 includes storage control section 301 instead of storage control section 125 of base station apparatus 100 shown in FIG.
  • the storage control unit 301 acquires the authentication data and stores it in the memory 130. Specifically, the storage control unit 301 additionally registers the acquired authentication data in the authentication database 131. Then, the storage control unit 301 instructs the base station device 100 that holds the same authentication database as the authentication database 131 to synchronize the authentication database. That is, the storage control unit 301 transmits the authentication data additionally registered in the authentication database 131 to the neighboring base station devices 100, and causes the authentication database to additionally register.
  • the obtained authentication data is not stored separately from the authentication database 131 in the memory 130. . Further, when the authentication data is additionally registered in the authentication database 131, the synchronization of the authentication database is executed between the base station apparatuses 100 holding the same authentication database.
  • the radio quality between the terminal device 200 and the neighboring base station device 100 including the currently communicating source base station decreases, and the When the wireless quality during the period becomes good, the HO request is transmitted from the source base station to the target base station.
  • This HO request is received by the wired I / F unit 110 of the target base station (Step S101), and is acquired by the HO request acquisition unit 121.
  • the HO request acquisition unit 121 determines whether or not the HO request includes the terminal ID of the terminal device 200 to be handed over (step S102). If the terminal ID is included (step S102 Yes), the terminal ID is authenticated. The data is output to the data search unit 123. Then, the authentication data search unit 123 searches for the terminal ID in the authentication database 131 of the memory 130 (step S103). Then, the authentication data search unit 123 determines whether or not the terminal ID of the terminal device 200 to be handed over is stored in the authentication database 131 (step S104).
  • the authentication data request unit 124 If the result of this determination is that the terminal ID is not stored in the authentication database 131 (No at step S104), the authentication data request unit 124 generates an authentication data request for requesting the authentication data of the terminal device 200. Then, the authentication data request is transmitted from the wired I / F unit 110 to the source base station (step S105).
  • the source base station When the authentication data request is received by the source base station, the source base station transmits the authentication data of the terminal device 200 to be handed over to the target base station. Since the source base station has authenticated the terminal device 200 at the time of starting wireless communication with the terminal device 200 or obtained the authentication data for the terminal device 200 when the terminal device 200 has handed over from another base station device 100, 200 authentication data are stored. Therefore, the source base station always holds the authentication data regarding the terminal device 200, and transmits this authentication data in accordance with a request from the target base station.
  • the authentication data relating to the terminal device 200 is received by the wired I / F unit 110 of the target base station and acquired by the storage control unit 301. Then, the acquired authentication data is additionally registered in the authentication database 131 by the storage control unit 301 (step S301). As a result, the authentication data related to the terminal device 200 that is to be handed over, which is the authentication data that has not been stored in the authentication database 131 that is distributed and arranged in advance, is held in the memory 130.
  • the storage control unit 301 synchronizes the authentication databases of the other base station apparatuses 100 (step S302). Specifically, the authentication data additionally registered in the authentication database 131 is transmitted to another base station apparatus 100 holding the same authentication database as the authentication database 131, and an instruction to synchronize the authentication database is issued.
  • the base station apparatuses 100 instructed to synchronize the authentication databases additionally register the specified authentication data in the authentication database, and the authentication databases of the respective base station apparatuses 100 including the authentication database 131 are synchronized.
  • the HO request obtained by the HO request obtaining unit 121 is output to the HO processing unit 122, and the HO processing unit 122 executes a handover process (step S107). Specifically, the HO processing unit 122 determines whether to permit the handover of the terminal device 200, and a handover response indicating the determination result is transmitted from the wired I / F unit 110 to the source base station. This handover process is also executed when the terminal ID is not included in the HO request (step S102 No) or when the authentication data relating to the terminal device 200 is stored in the memory 130 (step S104 Yes).
  • step S201 When the terminal device 200 starts wireless communication with the source base station 100a, an RRC message is transmitted and received (step S201), and a connection between the terminal device 200 and the source base station 100a is established.
  • the RRC message also includes the terminal ID of the terminal device 200, and the terminal device 200 is authenticated by collating the terminal ID in the authentication database held by the source base station 100a. That is, here, it is assumed that the authentication data including the terminal ID of the terminal device 200 is stored by the source base station 100a.
  • the terminal device 200 and the source base station 100a start wireless communication.
  • the wireless quality between the terminal device 200 and the source base station 100a is periodically measured by the wireless quality measurement unit 222 of the terminal device 200. You. Also, the radio quality between the terminal device 200 and the base station device 100 around the source base station 100a is measured. The measured radio quality with each base station device 100 is reported to the source base station 100a (step S202).
  • the source base station 100a determines whether or not a handover of the terminal device 200 is necessary, based on the radio quality reported from the terminal device 200. That is, when the radio quality between the terminal device 200 and the source base station 100a decreases and the radio quality between the terminal device 200 and the target base station 100b is good, the source base station 100a A decision is made to perform handover to the target base station 100b. Then, the source base station 100a transmits an HO request requesting handover of the terminal device 200 to the target base station 100b (Step S203). At this time, the source base station 100a transmits the terminal ID of the terminal device 200 by including it in the HO request.
  • the HO request including the terminal ID is received by the wired I / F unit 110 of the target base station 100b
  • the HO request is obtained by the HO request obtaining unit 121, and the terminal ID is output to the authentication data search unit 123.
  • the authentication data search unit 123 searches the authentication database 131 of the memory 130 for authentication data including the terminal ID (step S204).
  • the terminal ID of the terminal device 200 is not stored in the memory 130 of the target base station 100b.
  • an authentication data request is generated by the authentication data request unit 124 and transmitted to the source base station 100a (step S205).
  • the source base station 100a Upon receiving the authentication data request, the source base station 100a transmits authentication data including the terminal ID of the terminal device 200 to the target base station 100b (Step S206).
  • the authentication data is additionally registered in the authentication database 131 of the memory 130 by the storage control unit 301 of the target base station 100b.
  • the authentication of the terminal device 200 succeeds in a short time. That is, if the terminal ID of the terminal device 200 is compared with the authentication database 131 in the next authentication process, the authentication data including the terminal ID is stored in the authentication database 131, and the authentication of the terminal device 200 succeeds. In other words, even when the database for the authentication process is distributed, it is possible to perform quick authentication.
  • step S401 When the authentication data is additionally registered in the authentication database 131, the additionally registered authentication data is transmitted by the storage control unit 301 to the base station device 100 holding the same authentication database as the authentication database 131 (step S401). Then, each base station device 100 additionally registers the authentication data received from the target base station 100b in the authentication database, and synchronization of the authentication database between the base station devices 100 is executed.
  • the authentication database held by each base station apparatus 100 can always be kept in the same state.
  • the authentication of the terminal device 200 succeeds in a short time. That is, in the authentication processing by any of the base station apparatuses 100 holding the same authentication database, if the terminal ID of the terminal device 200 is compared with the authentication database, the authentication data including the terminal ID is stored in the authentication database. The authentication of the terminal device 200 succeeds. In other words, even when the database for the authentication process is distributed, it is possible to perform quick authentication.
  • the terminal device 200 when the terminal device 200 performs a handover, the terminal device 200 has already been authenticated by the source base station 100a. Therefore, when the HO request acquisition unit 121 acquires the HO request, the handover process is performed regardless of whether the authentication data including the terminal ID is stored in the memory 130. That is, the reason that the authentication data of the terminal device 200 is acquired from the source base station 100a and held in the memory 130 is for the authentication process when the terminal device 200 starts wireless communication with the target base station 100b from the next time. is there. Therefore, regardless of whether the authentication data is obtained from the source base station 100a, the HO processing unit 122 determines whether to permit the handover of the terminal device 200.
  • a handover response including the determination result by the HO processing unit 122 is transmitted to the source base station 100a (step S207). If the handover is permitted, a handover instruction is transmitted from the source base station 100a to the terminal device 200. Is performed (step S208). The terminal device 200 performs a handover to the target base station 100b according to the instruction from the source base station 100a, and sets the target base station 100b as a communication partner of the wireless communication (Step S209).
  • the target base station acquires the authentication data related to the terminal device from the source base station and stores the authentication data in the authentication database. Register additionally. For this reason, in the authentication process when the terminal device next starts the wireless communication with the target base station, the authentication data on the terminal device is stored in the authentication database of the target base station, and the authentication of the terminal device succeeds. . Further, the additionally registered authentication data is transmitted to the base station apparatus holding the same authentication database as the target base station, and the synchronization of the authentication database is executed.
  • the authentication data related to the terminal device is stored in the authentication database, and the authentication of the terminal device succeeds.
  • a database for the authentication process is distributed in the base station device, it is possible to quickly perform authentication of the terminal device.
  • a feature of the third embodiment is that the target base station acquires and stores the authentication database held by the source base station when the terminal device performs handover from the source base station to the target base station.
  • the configuration of the wireless communication system according to the third embodiment is the same as that of the first embodiment (FIGS. 1 and 2), and a description thereof will be omitted. Further, the configuration of terminal apparatus 200 according to Embodiment 3 is the same as that of Embodiment 1 (FIG. 5), and a description thereof will not be repeated. Embodiment 3 is different from Embodiment 1 in the configuration of base station apparatus 100 as a target base station.
  • FIG. 12 is a block diagram showing a configuration of base station apparatus 100 according to Embodiment 3. 12, the same components as those in FIG. 3 are denoted by the same reference numerals, and description thereof will be omitted.
  • the base station device 100 shown in FIG. 12 is different from the base station device 100 shown in FIG. 3 in that the authentication data search unit 123, the authentication data request unit 124, and the storage control unit 125 are replaced with a database determination unit 401, a database request unit 402, It has a control unit 403.
  • the HO request includes a database ID of an authentication database that stores authentication data relating to terminal device 200 to be handed over. That is, the HO request includes a database ID for identifying the authentication database used for the authentication process of the terminal device 200 in the source base station. Therefore, the HO request acquisition unit 121 outputs the acquired HO request to the HO processing unit 122, and outputs the database ID to the database determination unit 401 when the HO request includes the database ID.
  • the database determination unit 401 determines whether the authentication database corresponding to the database ID is stored in the memory 130. That is, the database determination unit 401 determines whether the same authentication database as the authentication database held by the source base station is already stored in the memory 130. As will be described later, the memory 130 stores an authentication database 131 distributed and arranged in advance in the base station device 100, and also stores an authentication database acquired from another base station device 100 in the past. The database determination unit 401 determines whether any of the authentication databases stored in the memory 130 corresponds to the database ID included in the HO request. Then, when the authentication database corresponding to the database ID is not stored in the memory 130, the database determination unit 401 notifies the database requesting unit 402 of the fact.
  • the database request unit 402 When notified from the database determination unit 401 that the authentication database corresponding to the database ID is not stored in the memory 130, the database request unit 402 generates a database request requesting transmission of the authentication database corresponding to the database ID. I do. Then, the database request unit 402 transmits a database request from the wired I / F unit 110 to the source base station.
  • the storage control unit 403 acquires the authentication database and stores it in the memory 130. Specifically, the storage control unit 301 stores the acquired authentication database in the memory 130 separately from the authentication database 131.
  • the memory 130 stores, as the acquisition database 404, the authentication database acquired from the source base station by the storage control unit 403, separately from the authentication database 131 distributed and arranged in the base station apparatus 100 in advance.
  • the acquisition database 404 is an authentication database corresponding to the database ID included in the HO request, and is an authentication database that holds authentication data relating to the terminal device 200.
  • the radio quality between the terminal device 200 and the neighboring base station device 100 including the currently communicating source base station decreases, and the When the wireless quality during the period becomes good, the HO request is transmitted from the source base station to the target base station.
  • This HO request is received by the wired I / F unit 110 of the target base station (Step S101), and is acquired by the HO request acquisition unit 121.
  • the HO request acquisition unit 121 determines whether or not the database ID of the authentication database including the authentication data relating to the terminal device 200 is included in the HO request (step S501), and if the database ID is included (step S501 Yes). , The database ID is output to the database determination unit 401. Then, the database determination unit 401 determines whether the authentication database corresponding to the database ID is stored in the memory 130 (step S502). In other words, it is determined whether one of the authentication database 131 and the acquisition database 404 stored in the memory 130 is the authentication database corresponding to the database ID.
  • the database request unit 402 If the result of this determination is that the authentication database corresponding to the database ID is not stored in the memory 130 (No in step S502), the database request unit 402 generates a database request requesting transmission of the authentication database corresponding to the database ID. Is done. Then, the database request is transmitted from the wired I / F unit 110 to the source base station (step S503).
  • the source base station When the database request is received by the source base station, the source base station sends an authentication database including authentication data on the terminal 200 to be handed over to the target base station.
  • the source base station authenticates the terminal device 200 at the start of wireless communication with the terminal device 200, or acquires an authentication database including authentication data on the terminal device 200 when the terminal device 200 has handed over from another base station device 100. Therefore, the authentication database required by the target base station is always held. Therefore, the source base station can transmit an authentication database including the authentication data of the terminal device 200 according to a request from the target base station.
  • the transmitted authentication database is received by the wired I / F unit 110 of the target base station and acquired by the storage control unit 403. Then, the acquired authentication database is stored in the memory 130 as the acquired database 404 by the storage control unit 403 (step S504). As a result, the authentication database that is authentication data that has not been stored in the distributed authentication database 131 in advance and that includes authentication data relating to the terminal device 200 that is to be handed over is held in the memory 130.
  • the HO request obtained by the HO request obtaining unit 121 is output to the HO processing unit 122, and the HO processing unit 122 executes a handover process (step S107). Specifically, the HO processing unit 122 determines whether to permit the handover of the terminal device 200, and a handover response indicating the determination result is transmitted from the wired I / F unit 110 to the source base station. This handover process is also executed when the database ID is not included in the HO request (step S501 No) or when the authentication database corresponding to the database ID is stored in the memory 130 (step S502 Yes).
  • step S201 When the terminal device 200 starts wireless communication with the source base station 100a, an RRC message is transmitted and received (step S201), and a connection between the terminal device 200 and the source base station 100a is established.
  • the RRC message also includes the terminal ID of the terminal device 200, and the terminal device 200 is authenticated by collating the terminal ID in the authentication database held by the source base station 100a. That is, here, it is assumed that an authentication database including authentication data regarding the terminal device 200 is held by the source base station 100a.
  • the terminal device 200 and the source base station 100a start wireless communication.
  • the wireless quality between the terminal device 200 and the source base station 100a is periodically measured by the wireless quality measurement unit 222 of the terminal device 200. You. Also, the radio quality between the terminal device 200 and the base station device 100 around the source base station 100a is measured. The measured radio quality with each base station device 100 is reported to the source base station 100a (step S202).
  • the source base station 100a determines whether or not a handover of the terminal device 200 is necessary, based on the radio quality reported from the terminal device 200. That is, when the radio quality between the terminal device 200 and the source base station 100a decreases and the radio quality between the terminal device 200 and the target base station 100b is good, the source base station 100a A decision is made to perform handover to the target base station 100b. Then, the source base station 100a transmits an HO request for requesting handover of the terminal device 200 to the target base station 100b (Step S601). At this time, the source base station 100a transmits a database ID for identifying the authentication database used for authentication of the terminal device 200 in the HO request.
  • the HO request including the database ID is received by the wired I / F unit 110 of the target base station 100b, the HO request is obtained by the HO request obtaining unit 121, and the database ID is output to the database determining unit 401. Then, the database determining unit 401 determines whether or not the authentication database corresponding to the database ID is stored in the memory 130 (Step S602).
  • the authentication databases held by the source base station 100a and the target base station 100b are different, and neither the authentication database 131 nor the acquisition database 404 is the authentication database corresponding to the database ID.
  • a database request is generated by the database request unit 402 and transmitted to the source base station 100a (step S603).
  • the source base station 100a transmits an authentication database including authentication data on the terminal device 200 to the target base station 100b (Step S604).
  • the transmitted authentication database is stored in the memory 130 as the acquisition database 404 by the storage control unit 403 of the target base station 100b.
  • the authentication of the terminal device 200 succeeds in a short time. That is, in the next authentication process, if the terminal ID of the terminal device 200 is compared with the acquisition database 404, the authentication data including the terminal ID is held in the acquisition database 404, and the authentication of the terminal device 200 succeeds. In other words, even when the database for the authentication process is distributed, it is possible to perform quick authentication.
  • the terminal device 200 when the terminal device 200 performs a handover, the terminal device 200 has already been authenticated by the source base station 100a. Therefore, when the HO request acquisition unit 121 acquires the HO request, the handover process is performed regardless of whether the authentication database corresponding to the database ID is stored in the memory 130. That is, the reason why the authentication database for the terminal device 200 is acquired from the source base station 100a and held in the memory 130 is for the authentication process when the terminal device 200 starts wireless communication with the target base station 100b from the next time. is there. Therefore, regardless of whether the authentication database is obtained from the source base station 100a, the HO processing unit 122 determines whether to permit the handover of the terminal device 200.
  • a handover response including the determination result by the HO processing unit 122 is transmitted to the source base station 100a (step S207). If the handover is permitted, a handover instruction is transmitted from the source base station 100a to the terminal device 200. Is performed (step S208). The terminal device 200 performs a handover to the target base station 100b according to the instruction from the source base station 100a, and sets the target base station 100b as a communication partner of the wireless communication (Step S209).
  • the target base station when the terminal device performs handover from the source base station to the target base station, the target base station obtains an authentication database including authentication data on the terminal device from the source base station. And store it in memory. For this reason, in the authentication processing when the terminal device starts the wireless communication with the target base station next, the authentication data on the terminal device is stored in the memory of the target base station, and the authentication of the terminal device succeeds. In other words, even when a database for the authentication process is distributed in the base station device, it is possible to quickly perform authentication of the terminal device. In addition, since not only the authentication data relating to one terminal device but also the authentication database is stored in the target base station, it is possible to increase the possibility that the terminal device is successfully authenticated in the target base station.
  • the feature of the fourth embodiment is that the HO request transmitted from the source base station to the target base station includes the authentication data of the terminal device to be handed over.
  • Embodiment 4 The configuration of the wireless communication system according to Embodiment 4 is the same as that of Embodiment 1 (FIGS. 1 and 2), and a description thereof will not be repeated.
  • base station apparatus 100 as a source base station is referred to as source base station 500 in order to distinguish between a source base station and a target base station.
  • the configuration of terminal apparatus 200 according to Embodiment 4 is the same as that of Embodiment 1 (FIG. 5), and a description thereof will not be repeated.
  • Embodiment 4 is different from Embodiment 1 in the configuration of base station apparatuses as a source base station and a target base station.
  • FIG. 15 is a block diagram showing a configuration of source base station 500 according to Embodiment 4.
  • the source base station 500 illustrated in FIG. 15 includes a wireless communication unit 510, a processor 520, a memory 530, and a wired I / F unit 540.
  • the wireless communication unit 510 performs wireless transmission processing such as D / A conversion and up-conversion on transmission data generated by the processor 520, and wirelessly transmits the data via an antenna. Further, wireless communication section 510 performs wireless reception processing such as down-conversion and A / D conversion on received data wirelessly received via the antenna, and outputs the data to processor 520.
  • the processor 520 includes, for example, a CPU, an FPGA, or a DSP, and controls the whole of the source base station 500. Specifically, the processor 520 includes a wireless communication control unit 521, a wireless quality determination unit 522, and an HO request generation unit 523.
  • the wireless communication control unit 521 controls wireless communication performed by the wireless communication unit 510. That is, the wireless communication control unit 521 executes, for example, encoding and modulation of information, and generates transmission data transmitted from the wireless communication unit 521. Further, wireless communication control section 521 demodulates and decodes the received data output from wireless communication section 510.
  • the wireless quality determination unit 522 obtains the wireless quality reported from the terminal device 200 from the decoding result in the wireless communication control unit 521. Then, the wireless quality determination unit 522 determines whether to perform handover of the terminal device 200 based on the wireless quality measured by the terminal device 200. Specifically, the radio quality determination unit 522 determines that the radio quality between the source base station 500 and the terminal device 200 has dropped below a predetermined threshold, and the radio quality between the target base station 100 and the terminal device 200 When it is better than a predetermined reference, it is determined that the terminal device 200 is to be handed over to the target base station 100.
  • the HO request generation unit 523 generates an HO request for requesting the target base station 100 to perform a handover of the terminal device 200 when the wireless quality determination unit 522 determines that the terminal device 200 is to be handed over. At this time, the HO request generation unit 523 acquires authentication data including the terminal ID of the terminal device 200 from the authentication database 531 stored in the memory 530, and includes the acquired authentication data in the HO request. Then, HO request generation section 523 transmits an HO request including the authentication data of terminal apparatus 200 to target base station 100 via wired I / F section 540.
  • the memory 530 includes, for example, a RAM or a ROM, and stores information used by the processor 520 to execute processing. Specifically, memory 530 stores authentication database 531.
  • the authentication database 531 is an authentication database that is distributed in the source base station 500 in advance, and holds authentication data including terminal IDs of some terminal devices among all the terminal devices subscribed to the wireless communication system. Since the authentication data held in the authentication database 531 is, for example, authentication data relating to a terminal device having a common registered area, the same authentication database 531 may be stored in the neighboring base station device 100. However, in the present embodiment, the authentication database 531 held by the source base station 500 is different from the authentication database held by the target base station 100.
  • the wired I / F unit 540 has an interface connected to another base station device 100, and transmits and receives data to and from the other base station device 100. Specifically, when the terminal device 200 performs a handover, the wired I / F unit 540 transmits the HO request generated by the HO request generation unit 523 to the target base station 100. Note that the wired I / F unit 540 may have an interface for connecting to a higher-level device of the core network.
  • FIG. 16 is a block diagram showing the configuration of target base station 100 according to Embodiment 5. 16, the same parts as those in FIG. 3 are denoted by the same reference numerals, and the description thereof will be omitted.
  • the target base station 100 illustrated in FIG. 16 includes an authentication data search unit 551 and a storage control unit 552 instead of the authentication data search unit 123, the authentication data request unit 124, and the storage control unit 125 of the base station device 100 illustrated in FIG. Have.
  • the authentication data search unit 551 obtains the authentication data included in the HO request obtained by the HO request obtaining unit 121, and searches the memory 130 for the obtained authentication data. That is, the authentication data search unit 551 determines whether the authentication data of the terminal device 200 to be handed over is already stored in the target base station 100. The authentication data search unit 551 determines whether the authentication database 131 and the acquired authentication data 132 stored in the memory 130 store the authentication data included in the HO request. Then, when the authentication data of terminal device 200 is not stored in memory 130, authentication data search unit 551 outputs the authentication data included in the HO request to storage control unit 552.
  • the storage control unit 552 stores the authentication data in the memory 130. Specifically, the storage control unit 552 causes the memory 130 to store the acquired authentication data as the acquired authentication data 132 different from the authentication database 131.
  • the operation of the target base station 100 configured as described above will be described with reference to the flowchart shown in FIG. 17, the same parts as those in FIG. 4 are denoted by the same reference numerals.
  • an operation when the terminal device 200 performs handover from the source base station 500 to the target base station 100 will be described.
  • the radio quality between the source base station 500 and the target base station 100 decreases. If the wireless quality during the period becomes good, the HO request is transmitted from the source base station 500 to the target base station 100. At this time, source base station 500 transmits the authentication data of terminal device 200 in the HO request. This HO request is received by the wired I / F unit 110 of the target base station 100 (Step S101), and is acquired by the HO request acquisition unit 121.
  • the HO request acquisition unit 121 determines whether or not the authentication data of the terminal device 200 to be handed over is included in the HO request (step S701). If it is included (step S701 Yes), the authentication data is authenticated. The data is output to the data search unit 551. Then, the authentication data search unit 551 searches the authentication database 131 and the acquired authentication data 132 of the memory 130 for authentication data (step S702). Then, the authentication data search unit 551 determines whether the authentication data of the terminal device 200 to be handed over has already been stored in the memory 130 (step S703).
  • the storage control unit 552 stores the authentication data included in the HO request as the acquired authentication data 132 (Step S703). S704).
  • the authentication data that is not stored in the authentication database 131 and is related to the terminal device 200 that is to be handed over is stored in the memory 130.
  • the HO request obtained by the HO request obtaining unit 121 is output to the HO processing unit 122, and the HO processing unit 122 executes a handover process (step S107). Specifically, the HO processing unit 122 determines whether to permit the handover of the terminal device 200, and a handover response indicating the determination result is transmitted from the wired I / F unit 110 to the source base station 500. This handover process is also executed when authentication data is not included in the HO request (step S701 No) or when authentication data related to the terminal device 200 is stored in the memory 130 (step S703 Yes).
  • step S201 When the terminal device 200 starts wireless communication with the source base station 500, an RRC message is transmitted and received (step S201), and a connection between the terminal device 200 and the source base station 500 is established.
  • the RRC message also includes the terminal ID of the terminal device 200, and the terminal device 200 is authenticated by collating the terminal ID in the authentication database 531 held by the source base station 500. That is, here, it is assumed that the authentication data including the terminal ID of the terminal device 200 is stored by the source base station 500.
  • the terminal device 200 and the source base station 500 start wireless communication.
  • the wireless quality between the terminal device 200 and the source base station 500 is periodically measured by the wireless quality measurement unit 222 of the terminal device 200. You.
  • the radio quality between the terminal device 200 and the base station devices 100 around the source base station 500 is also measured. The measured radio quality with each base station device 100 is reported to the source base station 500 (step S202).
  • the source base station 500 determines whether the handover of the terminal device 200 is necessary. That is, when the radio quality between the terminal device 200 and the source base station 500 is reduced and the radio quality between the terminal device 200 and the target base station 100 is good, the source base station 500 It is determined that handover to the target base station 100 is to be performed. Then, source base station 500 transmits a HO request requesting handover of terminal device 200 to target base station 100 (step S801). At this time, source base station 500 transmits the authentication data of terminal device 200 in the HO request.
  • the HO request may be, for example, a C-plane message of the X2AP layer.
  • FIG. 19 shows an example of the format of such a message.
  • the information element name indicates the name of an information element that can be included in the message, and the presence indicates whether each information element is essential for the message.
  • the authentication data of the terminal device 200 performing the handover is stored in the information element “authentication data” and transmitted together with other information of the terminal device 200.
  • the format of the HO request is not limited to the above, and may be the same format as the C plane signal other than the X2AP layer, or may be a predetermined OAM signal format.
  • the HO request including the authentication data is received by the wired I / F unit 110 of the target base station 100
  • the HO request is obtained by the HO request obtaining unit 121, and the authentication data is output to the authentication data search unit 551.
  • the authentication data search unit 551 searches the authentication database 131 and the acquired authentication data 132 for authentication data (step S802).
  • the authentication data of the terminal device 200 is not stored in the memory 130 of the target base station 100.
  • the storage control unit 552 stores the authentication data included in the HO request in the memory 130 as the acquired authentication data 132 (step S803).
  • the authentication of the terminal device 200 succeeds in a short time. That is, in the next authentication process, if the terminal ID of the terminal device 200 is compared with the authentication database 131 and the acquired authentication data 132, the authentication data including the terminal ID is held in the acquired authentication data 132. 200 authentications succeed. In other words, even when the database for the authentication process is distributed, it is possible to perform quick authentication.
  • the terminal device 200 when the terminal device 200 performs a handover, the terminal device 200 has already been authenticated by the source base station 500. Therefore, when the HO request acquisition unit 121 acquires the HO request, the handover process is performed regardless of whether the authentication data is stored in the memory 130. That is, the HO processing unit 122 determines whether to permit the handover of the terminal device 200, and a handover response including the determination result by the HO processing unit 122 is transmitted to the source base station 500 (step S207). If the handover is permitted, a handover instruction is transmitted from the source base station 500 to the terminal device 200 (step S208), and the terminal device 200 performs a handover to the target base station 100 according to the instruction from the source base station 500. Then, the target base station 100 is set as a communication partner of the wireless communication (step S209).
  • the source base station transmits a handover request including authentication data related to the terminal device to the target base station. .
  • the target base station stores the authentication data included in the handover request in the memory. For this reason, in the authentication processing when the terminal device starts the wireless communication with the target base station next, the authentication data on the terminal device is stored in the memory of the target base station, and the authentication of the terminal device succeeds. In other words, even when a database for the authentication process is distributed in the base station device, it is possible to quickly perform authentication of the terminal device. Further, since the authentication data is included in the handover request, the target base station does not need to request the source base station to transmit the authentication data of the terminal device, thereby reducing the number of times of transmission and reception between the base station devices. be able to.
  • the authentication data is stored separately from the authentication database 131 as in the first embodiment, but the authentication data included in the HO request is stored in the same manner as in the second embodiment.
  • the information may be additionally registered in the authentication database 131.
  • the source base station 500 may transmit the authentication database including the authentication data of the terminal device 200 in the HO request.
  • the handover response is transmitted from the target base station to the source base station after the authentication data or the authentication database is transmitted from the source base station to the target base station.
  • the handover process including the transmission of the handover response may be executed before the acquisition of the authentication data or the authentication database, or may be executed in parallel with the acquisition of the authentication data or the authentication database.
  • base station apparatus 100 described in each of the above embodiments may have a function as a CU when the function of the base station apparatus is separated into CU (Central @ Unit) and DU (Distributed @ Unit). , DU.
  • the wireless communication unit 140 may be arranged as a separate unit corresponding to a DU.
  • the wired I / F unit 110 may be connected to another DU via the CU, or may be directly connected to another DU.

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Abstract

L'invention concerne un dispositif de station de base qui comprend : une unité de stockage (130) qui contient une base de données d'authentification qui stocke des données d'authentification utilisées dans l'authentification d'un dispositif terminal ; une unité d'acquisition (121) qui acquiert une demande de transfert intercellulaire demandant un transfert intercellulaire d'un premier dispositif terminal durant une communication avec un autre dispositif de station de base ; une unité de demande (124) qui, si la demande de transfert intercellulaire a été acquise par l'unité d'acquisition (121), demande à l'autre dispositif de station de base de transmettre des données d'authentification à utiliser dans l'authentification du premier dispositif terminal ; et une unité de commande de stockage (125) qui reçoit les données d'authentification demandées par l'unité de demande (124) et amène l'unité de stockage (130) à stocker les données d'authentification.
PCT/JP2018/026601 2018-07-13 2018-07-13 Dispositif de station de base, système de communication sans fil et procédé d'acquisition de données d'authentification WO2020012658A1 (fr)

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PCT/JP2018/026601 WO2020012658A1 (fr) 2018-07-13 2018-07-13 Dispositif de station de base, système de communication sans fil et procédé d'acquisition de données d'authentification

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PCT/JP2018/026601 WO2020012658A1 (fr) 2018-07-13 2018-07-13 Dispositif de station de base, système de communication sans fil et procédé d'acquisition de données d'authentification

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004318546A (ja) * 2003-04-17 2004-11-11 Yokogawa Electric Corp 認証システム
JP2015104047A (ja) * 2013-11-27 2015-06-04 日本電信電話株式会社 接続認証方法、そのシステム、無線基地局および端末

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004318546A (ja) * 2003-04-17 2004-11-11 Yokogawa Electric Corp 認証システム
JP2015104047A (ja) * 2013-11-27 2015-06-04 日本電信電話株式会社 接続認証方法、そのシステム、無線基地局および端末

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