WO2006064705A1 - 無線網制御装置、無線lan中継装置、無線通信システム及び無線通信システムの通信方法 - Google Patents
無線網制御装置、無線lan中継装置、無線通信システム及び無線通信システムの通信方法 Download PDFInfo
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- WO2006064705A1 WO2006064705A1 PCT/JP2005/022478 JP2005022478W WO2006064705A1 WO 2006064705 A1 WO2006064705 A1 WO 2006064705A1 JP 2005022478 W JP2005022478 W JP 2005022478W WO 2006064705 A1 WO2006064705 A1 WO 2006064705A1
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- wireless
- control device
- wireless lan
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W92/00—Interfaces specially adapted for wireless communication networks
- H04W92/02—Inter-networking arrangements
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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
- H04W12/062—Pre-authentication
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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
- H04W12/069—Authentication using certificates or pre-shared keys
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W84/00—Network topologies
- H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
- H04W84/10—Small scale networks; Flat hierarchical networks
- H04W84/12—WLAN [Wireless Local Area Networks]
Definitions
- Wireless network control device wireless LAN relay device, wireless communication system, and communication method for wireless communication system
- the present invention relates to a handover system in which communication is continued when a network type changes due to movement during communication in a linkage system between a mobile communication network represented by W-CDMA and a heterogeneous network such as a wireless LAN. It is about technology.
- the interwork system is a 3GPP (3rd Generation Partnership Project), and an architecture for realizing a scenario for accessing a packet service of a mobile communication network via a WL AN has been standardized.
- 3GPP TS Technical Specification
- 234 describes the requirements
- 23.234 describes the architecture
- 33.234 describes the authentication method power S.
- Japanese Patent Laid-Open No. 2000-349829 describes a method of performing packet call handover between mobile phone networks using a home agent 2613.
- an example of a processing method when packet access is performed using a terminal that can access both the mobile communication network and the wireless LAN and the mobile network is moved from the coverage area of the mobile communication network to the wireless LAN. Indicates.
- FIG. 26 shows a configuration diagram of an interwork system constructed by a conventional technique.
- terminal 2601 has both mobile communication network and wireless LAN packet access means.
- Terminal 2601 corresponds to UE (User Equipment) in the 3GPP standard.
- UE User Equipment
- 1st base station The device 2602a and the second base station device 2602b mutually convert the radio signal from the terminal 2601 into a wired signal and transmit in the mobile communication network. It corresponds to Node B in the 3GPP standard.
- the first base station apparatus 2602a supports the cell Ml
- the second base station apparatus 2602b supports the cell M2.
- the first WLAN access network 2603a and the second WLAN access network 2603b are packet networks based on IP (Internet Protocol) or the like, and include an access point for connecting to the terminal 2601.
- the first WLAN access network 2603a covers the cell L1
- the second WLAN access network 2603b covers the cell L2. Both are collectively referred to as the WLAN access network 2603.
- the WLAN access network 2603 converts a wireless LAN wireless signal into a packet signal on a wired network.
- an address assignment operation is also performed as a DNS server.
- the WLA N access network 2603 corresponds to a WLAN AN (Access Network) in the 3GPP standard.
- Radio network control device 2604 is connected to base station device 2602 (or first base station device 2602a and second base station device 2602b) via IP, and performs radio-related terminal control in a mobile communication network. Transmits control data and user data.
- the radio network controller 2604 corresponds to a 3GPP standard RNC (Radio Network Controller). The effect of the present invention can be obtained even when the connection with the base station apparatus 2602 is ATM.
- the first WLAN relay device 2605a and the second WLAN relay device 2605b are connected to the first WLAN access network 2603a and the second WLAN access network 2603b, respectively, and control the wireless LAN between the WLAN access network 2603 connected to each of them. Data 'Transfer user data.
- the first WLAN relay device 2605a and the second WLAN relay device 2605b correspond to WAG (Wireless Access Gateway) in the 3GPP standard. Both are collectively referred to as the WLAN access network 2603.
- the WLAN relay device corresponds to “Wireless Network Controller” in the claims.
- the packet control device 2606 is connected to the radio network control device 2604, and performs packet transmission control processing in the mobile communication network and state management of the terminal 2601 related to packet transmission.
- the packet controller 2606 assumes that the connection with the radio network controller 2604 uses IP.
- the packet controller 2606 is SGSN (Serving GPRS Support Nod) in the 3GPP standard.
- the mobile network packet relay device 2607 is connected to the WLAN access network 2603 via the IP, and relays packet data from the mobile communication network to the Internet. In 3GPP standard, it corresponds to G GSN (Gateway GPRS Support Node).
- G GSN Gateway GPRS Support Node
- a mobile network packet relay device 2607 is arranged for each APN (Access Point Name) that is a domain of the terminal 2601.
- the packet data relay device 2608 is connected to the mobile network packet relay device 2607 and the WLAN relay device 2605, and relays data from both to the public packet network 2612. Like the mobile network packet relay device 2607, the bucket data relay device 2608 supports APN. Here, the connection relationship between the packet data relay device 2608 and the WLAN relay device 2605 is assumed to be a one-to-many relationship.
- Authentication relay apparatus 2609 is connected to WLAN relay apparatus 2605, and receives authentication data from terminal 2601 via WLAN relay apparatus 2605 when terminal 2601 enters the coverage area of the wireless LAN.
- the authentication relay device 2609 corresponds to AAA Proxy in the 3GPP standard.
- the authentication server 2610 is connected to the authentication relay device 2609 and receives authentication data from the terminal 2601 via the authentication relay device 2609.
- the authentication server 2610 corresponds to AA A server in the 3GPP standard.
- the user information storage device 2611 is connected to the packet control device 2606, the mobile network packet relay device 2607, and the authentication server 2610, and is a service for which the user has a contract with a mobile communication network or a wireless LAN network carrier. Information is stored.
- the public packet network 2612 is a packet network located in the public.
- the Internet is one of the public packet networks 2612.
- Home agent 2613 relays data transmission of terminal 2601 and changes the data transmission destination according to the destination of terminal 2601.
- the home agent 2613 manages the location of the terminal 2601 using the mopile IP and registers the destination.
- the opposite node 2614 is a partner with which the terminal 2601 performs packet communication.
- a server or the like arranged on the Internet is included in the opposite node 2614.
- Mobile communication network Indicates a network composed of a mobile network packet relay device 2607, a packet control device 2606, a radio network control device 2604, and a base station device 2602.
- a wireless LAN refers to a network consisting of a packet data relay device 2608, a WLAN intermediate device 2605, and a WLAN access network 2603.
- FIG. 27 shows each component of the wireless LAN portion and a stack diagram of each protocol to be processed.
- the terminal 2601 has a remote IP layer 2702 for communicating with the opposite node 2614 and a transport IP layer 2703 for performing IP communication in a wireless LAN access network.
- Each IP address is assigned separately and is called remote IP address and local IP address respectively.
- the packet of the remote IP layer 2701 is sent to the packet data middle device 2608 serving as an entrance to the public packet network 2612.
- a tunnel 2702 for transmitting a packet of the remote IP layer 2701 is provided.
- the tunnel functions include a packet capsule transmission function, a packet header or payload compression function, and an encryption function.
- Information for setting each function such as encapsulation and compression 'encryption method, etc., and connection settings such as access point name and telephone number are held by the terminal 2601 and the packet data relay device 2608 for each tunnel.
- the transport IP layer 2703 is terminated at each node. Packets from the terminal 2601 are terminated by the WLAN access network 2603. L1 (physical layer) and L2 (data link layer) are not specified in this embodiment.
- IP packet communication of the terminal 2601 is performed in the following manner.
- the user's IP packet reaches the opposite node 2614 from the terminal 2601 via each node of the mobile communication network and the home agent 2613.
- the user's remote IP address is assigned by the mobile network packet relay 2607 that routes the remote IP address.
- the home agent 2613 is a home IP address that is an address in the home network of the terminal 2601 and an address of the terminal 2601 that is used in the network corresponding to the current location of the terminal 2601 (the visited network). It manages a set of care-of addresses, encapsulates the home IP address of the terminal 2601 output by the opposite node 2614, and transmits it to the care-of address.
- an IP packet from terminal 2601 is encapsulated and transmitted in the same manner as a packet in the reverse direction.
- the opposite node 2614 supports the Binding Update procedure, it is possible to transmit directly to the terminal 2601 and the opposite node 2614 without using the capsule.
- IP tunnel is created between nodes, and IP packets are encapsulated and transmitted.
- GTP GPRS Tuning Protocol
- Radio network control apparatus 2604 appropriately converts an IP packet into a logical channel or a transport channel, and transmits the packet to base station apparatus 2602a using an IP transport.
- Base station apparatus 2602a converts to a W-CDMA physical channel and communicates with terminal 2601.
- Terminal 2601 Power While performing packet communication 2810a to 2810d, processing when entering a wireless LAN area is performed as follows. First, in FIG. 28, the terminal 2601 detects the radio wave of the wireless LAN after 2801 cells entering the cell L1 in the wireless LAN area. The wireless LAN assumes the IEEE802.llaZbZg standard. In the local connection processing 2802, when a directional connection is made, a local IP address is assigned to the terminal 2601 by the first WLAN access network 2603 a.
- the terminal 2601 authenticates the user information storage device 2611 for packet access via the WLAN.
- the first WLAN relay device 2605a, the authentication relay device 2609 (not shown in FIG. 28), and the authentication server 2610 use EAP (PP Extensible Authentication Protocol). If there is no information related to the user required for authentication in the authentication sano 2610, it is obtained from the user information storage device 2611.
- EAP PP Extensible Authentication Protocol
- the terminal 2601 S DNS inquiry is performed.
- the first WLAN access network 2603a responds with a remote IP address, FQDN, and so on in all networks that can be used by the terminal 2601. Return the corresponding packet data relay device 2608 pair.
- the terminal 2601 selects the packet data relay device 2608 for the IP address acquired in the wireless LAN IP address acquisition process 28 04, and uses the set of remote IP address and FQDN to set the IP.
- a request to create a new tunnel is output to the packet data relay device 2608.
- the packet data relay device 2608 intermediates the authentication-in-progress device 2609 and the authentication Sano 2610, and confirms that the terminal 2601 has been authenticated.
- packet data relay apparatus 2608 and first WLAN relay apparatus 2603a exchange packet transmission policies.
- the policy to be applied is determined by the packet data relay device 2608, and the first WLAN relay device 2603a applies the transmission policy obtained from the packet data relay device 2608.
- tunnel creation processing 2808 the attributes of the tunnel are exchanged between terminal 2601 and packet data relay device 2608, and a tunnel between the two is created. Also, the packet data relay apparatus 2608 assigns a remote IP address to be an IP address of the terminal 2601 on the public packet network 2612.
- the terminal 2601 When the tunnel is created, the terminal 2601 performs remote IP address registration 2809 with respect to the home agent 2613. When the remote IP address is registered, the home agent 2613 changes the transmission destination of the packet from the opposite node 2614 to the new remote IP address.
- connection 2810 in the wireless LAN is established as described above, the terminal 2601 disconnects the connection of the mobile communication network.
- a method has been proposed. This method is an improved method of mopile IP that uses GPS to manage the location of terminal 2601 and manage the data. Based on the data, the terminal 2601 predicts the next cell to move. Cell movement is performed by using the currently communicable cell before moving to the cell for authentication processing and connection processing required when performing handover for the predicted cell. Reduce time switching time.
- the above IEICE Technical Report discloses a method that uses the location of the terminal 2601 to estimate the next cell to move from the GPS data, IP address, and location of the terminal 2601, and simplifies connection settings. Has been.
- a method of performing handover when a terminal moves between a UMTS area and a WLAN area is disclosed.
- WLAN is a functional element that interconnects the wireless LAN AP 2903, which is a wireless LAN access point, and the packet controller 2906. Connected via IWF (Inter-Working Function) 2905.
- IWF Inter-Working Function
- the wireless LAN IWF 2905 and the packet control device 2906 are connected by an Iu-ps interface.
- a primary GPRS context (Secondary GPRS context) and a secondary GPRS context (Secondary GPRS context) that store information related to the packet connection are created.
- the secondary GPRS context stores IP address and QoS connection information.
- a secondary GPRS context related to a wireless LAN network is activated in association with an ongoing packet connection session, and the secondary GPRS context is changed depending on the area of the terminal 2901, thereby enabling mobile communication by the terminal 2901. Network and wireless LAN network can be used properly.
- processing when a terminal 2901 that has made a packet connection with a mobile communication network using a terminal power cell Ml that has already established a connection with the mobile communication network enters cell L1 that is an area of the wireless LAN network Is done as follows. First, the terminal 2901 starts connection with the wireless LAN AP 2903. Terminal 2901 has the next power to acquire an IP address on the wireless LAN. Since there is already a connection through the mobile communication network, terminal 2901 cannot obtain a new IP address and Use the existing IP address. However, QoS can be changed. In this way, parameters are set, and a secondary GPRS context for wireless LAN is added to the mobile network packet relay device separately from the secondary GPRS context of the mobile communication network that is already in use. In this way, by creating a secondary GPRS context with different QoS for each network for each terminal and switching appropriately depending on the area where the terminal 2901 exists, a handover can be realized.
- the terminal determines whether or not handover can be performed and selects a switching destination cell.
- a terminal cannot grasp the usage status of nodes in the network, when multiple terminals perform handover in a place where multiple cells overlap, switching destinations may concentrate on the same cell. . Therefore, if the capacity of the access point or base station of the cell is exceeded, the network capacity of the network is exceeded, and congestion occurs, there is a problem that call loss occurs during handover.
- the IP address of the terminal is assigned when the mobile network packet relay apparatus 2607 is accessed, and generally the IP address is not changed when the cell is changed. Therefore, it is difficult to apply a method based on mopile IP that manages mobility by IP routing.
- the packet controller 2906 knows the location of the terminal 2901 in units of RA (Routeing Area) consisting of a plurality of cells, so that the cell L1 is adjacent to the cell L1. All cells included in RA. Therefore, there is a problem that the amount of calculation increases because it is determined whether or not there is a possibility of entering the cell L1 for a terminal that is not necessary for prediction of the terminal entering the cell L1.
- RA Radio Exposure Area
- Iu-ps is divided into a C-plane that performs control and a U-plane that transmits user data.
- the U-plane also uses GTP (GPRS Tunneling Protocol) to implement this interface. It is necessary to design a new protocol.
- the present invention predicts the movement of a terminal using a lower layer mobile communication network or a wireless LAN layer 2 mechanism in packet transmission such as IP, etc.
- a terminal that supports multiple wireless systems such as mobile communication and wireless LAN by performing terminal authentication and connection setting processing in the LAN network and transmitting the connection information created by the process to the terminal via the mobile communication network.
- packet communication between a mobile phone network (mobile communication network) and a wireless LAN can be performed without interruption.
- the wireless network control device of the present invention provides information input from a WLAN relay device that controls connection of one or more wireless LAN access (Local Area Network) networks.
- a terminal capable of communicating with a mobile communication network and the wireless LAN network has a configuration for outputting connection information necessary for communication with the wireless LAN network to the terminal. It realizes a node-over without interruption of packet communication between wireless LANs.
- the wireless LAN device of the present invention performs wireless control of one or more base station devices that perform wireless communication with a terminal that can communicate with a mobile communication network and a wireless LAN (Local Area Network) network.
- a wireless LAN relay device connected to a wireless network control device to be performed and a wireless LAN access network that can be connected to one or more of the terminals via a wireless LAN (Local Area Network) network
- a wireless communication from the wireless network control device In accordance with the LAN preliminary setting request, at least one of authentication processing or connection setting processing related to the terminal is performed, and connection information necessary for the terminal to communicate on the wireless LAN network is obtained by the authentication processing or the connection setting processing.
- the WAG connection setting unit is created and output to the wireless network control device.
- the wireless communication system of the present invention is a wireless communication system for linking a mobile communication network and a wireless LAN network, the terminal capable of communicating with the mobile communication network and the wireless LAN network, and the mobile communication
- a base station device that performs wireless communication to the terminal via a network
- a wireless network control device that is connected to one or more base station devices and performs wireless connection control of the terminal
- the wireless LAN network A wireless LAN access network that is wirelessly connected to the terminal, a wireless LAN relay device that is connected to the wireless network control device and one or more of the wireless LAN access networks and controls connection of the wireless LAN access network, and
- a packet data relay device that is connected to a wireless LAN relay device and relays the data of the wireless LAN relay device to a public packet network, and the wireless network control device estimates that the terminal may connect Access network
- the authentication processing request signal and the connection setting processing request signal are output to the wireless LAN relay device that controls the estimated wireless LAN network, and the selected wireless LAN relay device power is selected.
- An authentication process for determining whether or not the access network can be used is performed.
- the terminal performs a connection setting process in the wireless LAN network required when the terminal uses the wireless LAN access network, and the terminal Connection information necessary for communication via a wireless LAN is output to the wireless network control device, and the wireless network control device outputs the connection information to the terminal.
- connection information when the connection information is input to the terminal from the wireless network control device and the terminal enters the controllable area of the wireless LAN access network.
- the wireless LAN relay device may establish a connection using the connection information.
- the capacity of the wireless network control device and the capacity of the one or more base station devices and one or more of the wireless LAN access networks and the usage amount or failure information are included in the wireless communication system of the present invention.
- the base station apparatus that obtains network status information including information and performs the terminal power communication when the location of the terminal is a position where communication is possible simultaneously with the plurality of base station apparatuses or the wireless LAN access network
- the wireless LAN access network may be selected using the network status information.
- the wireless LAN relay device when the terminal enters the wireless LAN access network, notifies that the terminal can receive a packet via the wireless LAN.
- the packet data relay device is notified of a packet receivable notification, and when the packet data relay device receives the packet receivable notification, the wireless LAN relay device transmits the data input from the public packet network card. May be output to
- the terminal and the wireless network control device are a set of identifiers of the base station device or the wireless LAN access network with which the terminal communicates.
- Cell-in-communication cell set information, and prediction target cell set information that is a set of identifiers of the base station apparatus and the wireless LAN access network predicted to be connected by the terminal, and the terminal transmits the base station apparatus and the base station apparatus
- the wireless network control device assigns a cell of the base station device to the communicating cell set information To change the setting to the prediction target cell set information, notify the wireless LAN relay device, and update the communication cell set information and the prediction target cell set information to the terminal. May be output.
- the identifier of the wireless LAN access network is determined from the communication cell aggregate information and the prediction target cell. It is also possible to change the setting to aggregate information, notify the wireless LAN relay device, and output an update request signal that causes the terminal to update the communicating cell aggregate information and the prediction target cell aggregate information.
- an identifier of the wireless LAN access network is changed from the in-communication cell set information to the prediction target cell set information, and the base station apparatus includes the in-communication cell set information. Or the identifier of the wireless LAN access network exists.
- the wireless LAN relay device may be notified that the communication of the terminal has been disconnected, and the wireless LAN relay device may delete the connection information regarding the terminal.
- a radio communication system of the present invention includes a packet control device that is connected to the radio network control device and performs call control of packet communication by the mobile communication network, and the packet control device and the radio network related to the terminal.
- the radio network control device determines the identifier of the base station device connected to the radio network control device from the communicating cell set information and the prediction target cell set information. And when the identifier no longer exists in the in-communication cell aggregation information, the wireless LAN relay device having the identifier power S in the prediction target cell aggregation information outputs a deletion request signal for deleting the connection information, An update request signal for causing the terminal to update the communicating cell set information and the prediction target cell set information may be output.
- the communication method of the wireless communication system of the present invention includes a terminal capable of communicating with a mobile communication network and a wireless LAN (Local Area Network) network, and wireless communication to the terminal via the mobile communication network.
- a wireless LAN relay device that is connected to the wireless network control device and the one or more wireless LAN access networks, and controls connection of the wireless LAN access network; and a public packet that is connected to the wireless LAN relay device.
- a communication method of a wireless communication system comprising a packet data relay device for relaying data of the wireless LAN relay device to a network, wherein the mobile communication network and the wireless LAN network cooperate with each other, wherein a terminal controls the base station device Included in the target cell
- the wireless LAN access network that is estimated to be connected is selected, and the authentication processing request signal and the connection setting processing request signal of the terminal are transmitted via the base station apparatus to the wireless network control.
- the mobile communication network control device of the present invention includes a communication control unit that controls communication with a mobile terminal via a mobile communication network, a location information acquisition unit that acquires location information of the mobile terminal, and the location information.
- the mobile terminal in the wireless network predicted by the destination prediction unit and the destination network prediction unit that predicts the wireless network linked to the mobile communication network that is the destination of the mobile terminal.
- a wireless network control device that controls communication with the wireless communication network, and a connection information transmission unit that transmits connection information for connecting the mobile terminal to the wireless network.
- the mobile communication network control device of the present invention prepares for connection between the radio network and the mobile terminal transmitted from the radio network control device according to the connection information transmitted by the connection information transmitting unit.
- a wireless network information transmitting unit may be provided that transmits the wireless network information to the mobile terminal through a mobile communication network.
- the wireless network device of the present invention is a mobile communication network control that controls communication between a wireless control unit that controls communication with a mobile terminal via a wireless network and a mobile terminal via a mobile communication network that is linked to the own wireless network.
- a connection information receiving unit that receives connection information transmitted from a device to the mobile terminal's own wireless network; and, according to reception of the connection information by the connection information receiving unit, between the own wireless network and the public packet network.
- a tunnel setting unit that sets a tunnel for the mobile terminal with a relay device that relays packet communication, and when the tunnel setting unit makes a tunnel setting, prepares to connect to the mobile communication network control device And a response transmission unit that transmits a response indicating completion of.
- the radio network controller determines whether or not the mobile terminal is registered as a terminal connected to the mobile communication network in response to reception of connection information by the connection information receiving unit.
- the response transmission unit may transmit a response when the mobile terminal is authenticated by the authentication unit.
- the wireless network device of the present invention when detecting a mobile terminal in its own wireless network, determines whether or not a tunnel for the detected mobile terminal is set up with the relay device. A packet is received by the relay device according to the determination by the determination unit that determines whether or not a tunnel for the mobile terminal is set. A receivable notification transmission unit that transmits a packet receivable notification.
- the wireless communication system of the present invention is a wireless communication network control apparatus that controls communication with a mobile terminal via a mobile communication network, and a radio that controls communication between the mobile terminal via a wireless network linked to the mobile communication network.
- a network control device wherein the mobile communication network control device predicts a location information acquisition unit that acquires location information of the mobile terminal, and a wireless network that is a destination of the mobile terminal based on the location information
- a connection information transmitting unit for transmitting connection information for connecting the mobile terminal to the wireless network to the wireless network control device of the wireless network predicted by the movement destination predicting unit.
- the wireless network control device includes a connection information receiving unit that receives the connection information transmitted from the mobile communication network control device, and the connection information receiving unit.
- a tunnel setting unit configured to set a tunnel for the mobile terminal between a relay device that relays packet communication between the local wireless network and the public packet network in response to reception of connection information by the unit. .
- the communication method of the radio communication system of the present invention includes a mobile communication network control device that controls communication with a mobile terminal via a mobile communication network, and communication between the mobile terminal via a radio network linked to the mobile communication network.
- a communication method of a wireless communication system comprising a wireless network control device for controlling the mobile communication network, wherein the mobile communication network control device acquires location information of the mobile terminal, and based on the location information Connecting the mobile terminal to the wireless network to a destination prediction step for predicting a wireless network as a destination of the mobile terminal, and a wireless network control device of the wireless network predicted in the destination prediction step
- a connection information transmission step for transmitting connection information for transmission, and the wireless network control device transmits from the mobile communication network control device
- a connection information receiving step for receiving the connection information, and a relay device that relays packet communication between the local wireless network and the public packet network in response to the reception of the connection information in the connection information receiving step.
- a tunnel setting step for setting a tunnel for the mobile terminal.
- a wireless network control device of the present invention is a wireless network control device that controls communication with a mobile terminal via a wireless network, and is a mobile communication device linked to its own wireless network.
- An address information storage unit that stores address information of a mobile communication network control device of a communication network, a connection request reception unit that receives a connection request to the own wireless network transmitted from the mobile terminal, and a connection request by the connection request reception unit.
- the mobile terminal is connected to its own wireless network in response to reception of the mobile terminal, and a radio control unit that notifies the mobile terminal of address information of the mobile communication network control device stored in the address information storage unit.
- the radio network control device of the present invention may transmit a packet addressed to the mobile communication network control device transmitted from the mobile terminal to the mobile communication network control device.
- the wireless communication system of the present invention is a wireless communication network control device that controls communication with a mobile terminal via a mobile communication network, and a wireless communication that controls communication between the mobile terminal and a wireless network linked to the mobile communication network.
- a wireless network control device including an address information storage unit storing address information of a mobile communication network control device of a mobile communication network linked to the local wireless network, and a self-transmission transmitted from the mobile terminal.
- a connection request receiving unit that receives a connection request for a wireless network, and in response to reception of a connection request by the connection request receiving unit, connects the mobile terminal to its own wireless network, and is stored in the address information storage unit.
- a radio control unit that notifies the mobile terminal of address information of the mobile communication network control device.
- the mobile terminal registers with the mobile communication network using the address information of the mobile communication network control apparatus notified of the wireless network control apparatus power.
- a registration request for requesting may be transmitted to the mobile communication network control device via the radio network control device.
- the mobile communication network control device when the mobile communication network control device detects the mobile terminal in the mobile communication network, the detected mobile terminal is a terminal registered in the mobile communication network.
- a relay that relays packet communication with the public packet network according to the determination unit that determines whether or not the mobile terminal is detected and the determination that the detected mobile terminal is registered in the mobile communication network;
- a receivability notification transmission unit that transmits a packet receivability notification indicating that a packet can be received may be provided.
- a communication method of the wireless communication system of the present invention includes a mobile communication network control device that controls communication with a mobile terminal via a mobile communication network, and a wireless network that is linked to the mobile communication network.
- a communication method of a wireless communication system comprising a wireless network control device for controlling communication with a mobile terminal, the connection request receiving step for receiving a connection request for the own wireless network transmitted from the mobile terminal, A connection step of connecting the mobile terminal to the own wireless network in response to reception of a connection request in the connection request receiving step, and a mobile communication network control device of a mobile communication network in which the wireless network control device is linked to the own wireless network
- An address information notification step for reading the address information from the address information storage unit storing the address information and notifying the mobile terminal of the read address information.
- the wireless network control device of the present invention it is possible for a terminal to establish a connection and perform communication at an early stage after entering the area of the wireless LAN network.
- FIG. 1 is a diagram showing a configuration of a radio communication system according to a first embodiment of the present invention.
- FIG. 2 is a radio network control according to the first embodiment of the present invention.
- FIG. 3 is a diagram showing the configuration of a WLAN relay device according to the first embodiment of the present invention.
- FIG. 4 is a diagram according to the first embodiment of the present invention. Figure showing the field of the cell location management
- Fig. 5 is a protocol for packet communication in the mobile communication network according to the first embodiment of the present invention. Figure showing a stack
- FIG. 6 is a diagram showing information fields held by the terminal according to the first embodiment of the present invention.
- FIG. 7 is a diagram showing a sequence of “authentication” setting processing when predicting a movement destination according to the first embodiment of the present invention.
- FIG. 8 is a diagram showing an information field held by the radio network controller according to the first embodiment of the present invention.
- FIG. 9 is a diagram showing information fields held in the wireless LAN relay device according to the first embodiment of the present invention.
- FIG. 10 is a diagram showing a protocol stack for wireless LAN packet communication according to the first embodiment of the present invention.
- FIG. 11 is a diagram showing a sequence of a connection setting process when entering a terminal cell according to the first embodiment of the present invention.
- FIG. 12 is a diagram showing a protocol stack of a control signal for a wireless LAN according to the first embodiment of the present invention.
- FIG. 13 is a diagram showing a sequence of cutting processing according to the second embodiment of the present invention.
- FIG. 14 is a block diagram showing an internal configuration of the packet control device according to the present embodiment.
- FIG. 15 is a diagram showing the operation of the terminal.
- FIG. 16 is a field diagram of data held by the terminal.
- FIG. 17 is a field diagram of data held by the radio network controller.
- FIG. 18 is a field diagram of data held by the WLAN relay device.
- FIG. 19 is a field diagram of data held by the packet control device.
- FIG. 20 is a field diagram of data held by the mobile packet relay device.
- FIG. 21 is a field diagram of data held by the packet data relay device.
- FIG. 22 is a diagram showing processing when a terminal connects to a wireless LAN network.
- FIG. 23 is a diagram showing processing when a terminal connects to a wireless LAN network.
- FIG. 24 is a diagram showing processing when a terminal connects to a wireless LAN network.
- FIG. 25 shows a process when a terminal is handed over to a wireless LAN network or a mobile communication network. Diagram showing reason
- FIG. 26 is a diagram showing a configuration of a wireless communication system according to the prior art.
- Fig.27 shows the protocol stack for user data according to the prior art.
- FIG. 28 is a diagram showing a sequence showing an operation according to the prior art.
- FIG. 29 is a diagram showing a configuration of a wireless communication system according to the prior art.
- the wireless network control device of the present embodiment is input with the power of a WLAN relay device that controls connection of one or more wireless LAN access (Local Area Network) networks.
- a terminal capable of communicating with a mobile communication network and a wireless LAN network has a configuration for outputting connection information required when the terminal communicates with the wireless LAN network. It realizes handover without interruption of packet communication between LANs.
- the mobile communication network control apparatus is based on a communication control unit that controls communication with a mobile terminal via the mobile communication network, a position information acquisition unit that acquires position information of the mobile terminal, and the position information.
- a destination prediction unit that predicts a wireless network linked to a mobile communication network that is a destination of the mobile terminal, and a wireless network control device that controls communication with the mobile terminal in the wireless network predicted by the destination prediction unit
- a connection information transmission unit for transmitting connection information for connecting the mobile terminal to the wireless network.
- connection information of the mobile terminal By transmitting the connection information of the mobile terminal to the wireless network control device of the wireless network predicted as the movement destination of the mobile terminal in this way by the movement destination prediction unit, the mobile terminal moves to the wireless network.
- the mobile communication network control device is, for example, a radio control device (RNC) connected to a base station that performs radio communication with a mobile terminal.
- RNC radio control device
- the wireless network control device is, for example, a WLAN relay device connected to a WLAN access network that performs wireless communication with a mobile terminal.
- the mobile communication network control device indicates completion of preparation for connection between the wireless network transmitted by the wireless network control device and the mobile terminal according to the connection information transmitted by the connection information transmitting unit.
- a wireless network information transmitting unit may be provided that transmits wireless network information to the mobile terminal through the mobile communication network.
- the mobile terminal grasps the wireless network that is ready for connection by transmitting information on the wireless network to the mobile terminal. be able to.
- the wireless network device is a mobile communication device that controls communication between a wireless control unit that controls communication with a mobile terminal via a wireless network, and a mobile terminal that is connected to a mobile communication network linked to the own wireless network.
- a connection information receiving unit that receives connection information transmitted from the network control device to the mobile station's own wireless network, and the connection information receiving unit receives connection information from the local wireless network and the public packet network. Completing preparations for connection to the mobile communication network controller when the tunnel setting unit is set up by the tunnel setting unit and the tunnel setting unit for setting the tunnel for the mobile terminal between the relay device that relays packet communication
- a response transmission unit that transmits a response indicating
- the radio network controller determines whether or not the mobile terminal is registered as a terminal connected to the mobile communication network in response to the reception of the connection information by the connection information receiving unit.
- An authentication unit for authentication may be further provided, and the response transmission unit may transmit a response when the mobile terminal is authenticated by the authentication unit.
- the mobile terminal authenticates the mobile terminal according to the connection information, so that the mobile terminal is within its own wireless network. Time to authenticate the mobile terminal when entering Handover can be realized.
- the wireless network device of the present embodiment detects a mobile terminal in its own wireless network
- the power for setting the detected tunnel for the mobile terminal with the relay device is set.
- a packet reception notification indicating that the packet can be received is transmitted to the relay device. And a receivable notification transmitter.
- the relay device allows the mobile terminal to communicate with the wireless network by transmitting a packet reception ready notification to the relay device. Know that packets can be received via As a result, the relay apparatus can control the packet addressed to the mobile terminal transmitted from the public packet network to be transmitted to the wireless network control apparatus.
- the radio communication system of the present embodiment controls communication between a mobile communication network control device that controls communication with a mobile terminal via a mobile communication network and a mobile terminal via a radio network linked to the mobile communication network.
- the mobile communication network control device includes a location information acquisition unit that acquires location information of a mobile terminal, and a destination that predicts a radio network that is a destination of the mobile terminal based on the location information.
- the wireless network control apparatus of the wireless network predicted by the prediction unit and the movement destination prediction unit includes a connection information transmission unit that transmits connection information for connecting the mobile terminal to the wireless network.
- the network control device receives the connection information transmitted from the mobile communication network control device, and receives the connection information from the connection information receiving unit. Between the relay apparatus for relaying a packet communication with the network and the public packet network, and a tunnel configuration unit for performing tunnel configuration for the mobile terminal.
- the mobile communication network control device transmits the connection information of the mobile terminal in the mobile communication network to other radio network control devices in advance according to the predicted destination of the mobile terminal. Based on the connection information received by the wireless network control device, a tunnel for the mobile terminal is set up. Thus, when the mobile terminal actually enters the wireless network, the process of transmitting connection information from the mobile terminal to the wireless network control apparatus can be omitted, and a smooth handover can be realized.
- the communication method of the radio communication system according to the present embodiment includes a mobile communication network control device that controls communication with a mobile terminal via a mobile communication network, and communication between the mobile terminal via a radio network linked to the mobile communication network.
- a communication method of a wireless communication system comprising a wireless network control device for controlling a mobile terminal, wherein the mobile communication network control device acquires location information of the mobile terminal, and based on the location information, the mobile terminal A destination prediction step for predicting the wireless network that is the destination of the mobile station, and connection information for connecting the mobile terminal to the wireless network to the wireless network control device of the wireless network predicted in the destination prediction step.
- Connection information transmission step for transmission and connection information for the wireless network control device to receive connection information transmitted from the mobile communication network control device
- a tunnel for setting up a tunnel for the mobile terminal between the relay step that relays packet communication between the local wireless network and the public packet network in response to the reception of the connection information in the communication step and the connection information reception step.
- the radio network control apparatus of the present embodiment is a radio network control apparatus that controls communication with a mobile terminal via a radio network, and is the address of the mobile communication network control apparatus of the mobile communication network linked to the own radio network.
- An address information storage unit storing information, a connection request receiving unit for receiving a connection request to the own wireless network transmitted from the mobile terminal, and the mobile terminal receiving the connection request by the connection request receiving unit
- a wireless control unit that is connected to the network and notifies the mobile terminal of the address information of the mobile communication network control device stored in the address information storage unit.
- the radio controller transmits a packet addressed to the mobile communication network controller transmitted from the mobile terminal to the mobile communication network controller. A little.
- the wireless communication system of the present embodiment is a wireless communication network control device that controls communication with a mobile terminal via a mobile communication network, and a wireless communication that controls communication between the mobile terminal and a wireless network linked to the mobile communication network.
- a network control device comprising: an address information storage unit storing address information of a mobile communication network control device of a mobile communication network linked to the self-radio network; and a self-radio network transmitted from the mobile terminal
- a connection request receiving unit that receives a connection request to the mobile terminal, and a mobile communication network control stored in the address information storage unit, in addition to connecting the mobile terminal to the local wireless network in response to the connection request received by the connection request receiving unit.
- a radio control unit for notifying the mobile terminal of the address information of the device.
- connection request is transmitted to the mobile terminal power wireless network control device capable of communication by the mobile communication network in this way, the wireless network control device and the mobile terminal that is the transmission source of the connection request By transmitting the address information of the mobile communication network control device linked to the wireless network, the mobile terminal can grasp the address of the mobile communication network control device and can access the wireless network power mobile communication network control device.
- the mobile terminal requests registration to the mobile communication network using the address information of the mobile communication network control device notified of the wireless network control device power.
- the registration request to be transmitted may be transmitted to the mobile communication network control device via the wireless network control device.
- the mobile terminal connected to the wireless network can be registered in the mobile communication network control device, and when the mobile terminal actually enters the mobile communication network, the mobile terminal is registered in the mobile communication network. Therefore, smooth handover can be realized.
- the mobile communication network control device when the mobile communication network control device detects a mobile terminal in the mobile communication network, the detected mobile terminal is registered in the mobile communication network.
- a relay that relays packet communication with the public packet network in response to determining that the detected mobile terminal is registered in the mobile communication network; It may also include a receivable notification transmitter that transmits a packet receivable notification indicating that the packet can be received.
- the mobile terminal detected in the mobile communication network is already registered in the mobile communication network, the mobile terminal moves to the relay apparatus by transmitting a packet reception ready notification to the relay apparatus. Know that packets can be received via the communication network. As a result, the relay device can control to transmit a packet addressed to the mobile terminal transmitted from the public packet network to the mobile communication network.
- a communication method of the wireless communication system of the present embodiment includes a mobile communication network control device that controls communication with a mobile terminal via a mobile communication network, and a mobile terminal using a wireless network that is linked to the mobile communication network.
- a communication method of a wireless communication system comprising a wireless network control device for controlling communication, wherein a connection request receiving step for receiving a connection request for a local wireless network transmitted from a mobile terminal, and a connection request receiving step A connection step for connecting a mobile terminal to the own wireless network in response to reception of the connection request, and an address storing the address information of the mobile communication network control device of the mobile communication network linked to the own wireless network by the wireless network control device Address information notification that reads address information from the information storage unit and notifies the read address information to the mobile terminal And a step.
- the mobile terminal can grasp the address of the mobile communication network control device, and can access the mobile communication network control device from the wireless network.
- Various configurations of the wireless communication system of this embodiment can also be applied to the communication method of this embodiment.
- the mobile communication network is based on the W-CDMA system and the wireless LAN network is based on IEEE802.11 (a / b / g). It can also be applied to other mobile communication systems and wireless LAN systems.
- authentication processing is performed before a terminal that performs packet communication moves from a mobile communication network to a wireless local area network (WLAN) area.
- WLAN wireless local area network
- the specific processing content is that the wireless network control device sets connection information in the wireless LAN instead of the terminal using the terminal's telephone number (IMSI: International Mobile Subscriber Identity).
- IMSI International Mobile Subscriber Identity
- connection information required by the terminal is acquired via a wireless LAN relay device (hereinafter referred to as a WLAN relay device) and transmitted to the terminal.
- FIG. 1 shows a configuration diagram of a wireless communication system in the first embodiment.
- Public packet network 112 is a packet network located in the public.
- the Internet is one of the public packet networks 112.
- the terminal 101 has both mobile communication network and wireless LAN packet access means.
- the terminal 101 corresponds to UE (User Equipment) in the 3GPP standard.
- First base station apparatus 102a and second base station apparatus 102b mutually convert a radio signal of terminal 101 power into a wired signal in a mobile communication network, and transmit the signal to radio network control apparatus 104.
- the first base station apparatus 102a and the second base station apparatus 102b correspond to Node B in the 3GPP standard.
- the first base station apparatus 102a covers the cell Ml, and the second base station apparatus 102b covers the cell M2.
- the first WLAN access network 103a and the second WLAN access network 103b are a wireless LAN access network that accommodates wireless LAN terminals and a packet network based on IP (Internet Protocol) or the like.
- the first WLAN access network 103a covers the cell Ll
- the second WLAN access network 103b covers the cell L2. Both are collectively referred to as the WLAN access network 103.
- the WLAN access network 103 includes a wireless LAN access point for connection with the terminal 101, and converts a wireless LAN wireless signal into a packet signal on a wired network.
- the WLAN access network 103 is also assumed to perform an IP address assignment operation to the terminal as a DNS server. It corresponds to WLAN AN (Access Network) in the 3GPP standard.
- Radio network control apparatus 104 is connected to base station apparatus 102 via IP, and performs radio-related terminal control and transmission of control data and user data in the mobile communication network.
- the first WLAN relay device 105a and the second WLAN relay device 105b are connected to the first WLAN access network 103a and the second WLAN access network 103b, respectively, and control the wireless LAN between the connected WLA N access networks 103. Data ⁇ Transmit user data.
- the first WLAN relay device 105a and the second WLAN relay device 105b correspond to WAG (Wireless Access Gateway) in the 3GPP standard. These are collectively called WLAN relay device 105.
- the packet control device 106 is connected to the radio network control device 104, and performs packet transmission control processing in the mobile communication network and state management of the terminal 101 related to packet transmission. It is assumed that the connection of the wireless network control device 104 uses IP.
- the packet control device 106 corresponds to SGSN (Serving GPRS Support Node) in the 3GPP standard.
- Mobile network packet relay device 107 is connected to WLAN access network 103 via IP, and relays packet data from the mobile communication network to the Internet.
- the mobile network packet relay device 107 corresponds to a GGSN (Gateway GPRS Support Node) in the 3GPP standard.
- a mobile network packet relay device 107 is arranged for each APN (Access Point Name) that is a domain of the terminal 101.
- APN Access Point Name
- the packet data relay device 108 is connected to the mobile network packet relay device 107 and the WLAN relay device 105, and relays both data to the public packet network 112.
- the packet data relay device 108 corresponds to APN, like the mobile network packet relay device 107.
- the connection relation between the data relay device 108 and the WLAN relay device 105 is assumed to be a one-to-many relationship.
- Authentication relay apparatus 109 is connected to WLAN relay apparatus 105, and receives authentication data from terminal 101 via WLAN relay apparatus 105 when terminal 101 enters the wireless LAN cover area.
- the authentication relay device 109 corresponds to AAA Proxy in the 3GPP standard.
- the authentication server 110 is connected to the authentication relay device 109 and receives authentication data from the terminal 101 via the authentication relay device 109.
- the authentication server 110 is AAA Server 7 according to the 3GPP standard.
- the user information storage device 111 is connected to the packet control device 106, the mobile network packet relay device 107, and the authentication server 110, and the user communicates with the mobile communication network or the wireless LAN network. Stores service information contracted with the service provider.
- the public packet network 112 is a packet network located in the public.
- the Internet is one of the public packet networks 112.
- the opposite node 114 is a partner with which the terminal 101 performs packet communication.
- servers arranged on the Internet are included in the opposite node 114.
- the mobile communication network refers to a network composed of mobile network packet relay device 107, packet control device 106, radio network control device 104, and base station device 102.
- the wireless LAN refers to a network composed of the packet data relay device 108, the WLAN relay device 105, and the WLAN access network 103.
- terminal 101b is the terminal 101a that has moved to the cell L1.
- terminal 101a and terminal 101b are collectively referred to as terminal 101.
- mobile network packet relay device 107 and packet data relay device 108 are connected. Instead of the home agent, the packet data relay device 108 performs routing with the bucket network, and the wireless network control device 104 and the WLAN relay device 105 are connected to mutually exchange authentication information and control information. These two points are different from the conventional example.
- FIG. 2 shows a configuration diagram of radio network control apparatus 104 in the first embodiment.
- the terminal control unit 201 has a function of managing and controlling the wireless communication state of the terminal 101 such as the RRC of TS25.331.
- the terminal information management unit 202 has a function of maintaining and managing the radio communication state of the terminal 101 existing in the RRC of TS25.331, the cell under the control of the radio network controller 104, or the area of the WLAN access network 103.
- the terminal control unit 201 corresponds to a “location information acquisition unit” and a “destination prediction unit” in the claims.
- Cell location management section 203 manages network side devices other than terminal 101 and the state of the network as information for performing communication control of terminal 101. Specific information managed by the cell location management unit 203 includes performance such as the location, transmission capability, capacity, output, or cover radius of the WLAN access network 103 and the base station device 102.
- the RNC connection setting unit 204 sets a data transmission path between the packet control device 106, the base station device 102, and the WLAN relay device 105. Performs connection control using RANAP, NBAP, etc. in 3GPP.
- Base station communication section 205 is means for communicating with base station apparatus 102. UTRAN internal transport protocol, control plane and user plane Transmission processing is included in the base station communication unit 205.
- the base station communication unit 205 corresponds to a “communication control unit” in the claims.
- WAG communication section 206 communicates authentication / control information with WLAN relay apparatus 105.
- the SG SN communication unit 207 is a means for encapsulating the user's IP packet and transmitting it to the packet controller 106. In this embodiment, it is assumed that IP protocol or GTP is used.
- FIG. 3 shows a configuration diagram of the WLAN relay device 105 in the first embodiment.
- the WAG connection setting unit 301 performs connection settings between the terminal 101 and the packet data relay apparatus 108 in the wireless LAN under the WLAN relay apparatus 105.
- the terminal management unit 302 manages all terminals 101 in the wireless LAN area under the WLAN relay device 105.
- the WLAN communication unit 303 communicates with the WLAN access network 103 via IP.
- the WAG connection setting unit 301 corresponds to the “authentication unit”, “determination unit”, and “receivable notification transmission unit” in the claims.
- the RNC communication unit 304 communicates with the radio network controller 104 via IP.
- the PDG communication unit 305 communicates with the packet data relay apparatus 108 via IP.
- the wireless LAN relay device 105 communicates with the authentication relay device 109 using a conventional processing unit (not shown).
- the user information storage device 111 stores user data in the mobile communication network and the wireless LAN.
- User data includes, for example, a user profile.
- a user profile In addition to the terminal IDs listed in TS23.234 and telephone numbers conforming to E.164), whether or not interworking or tunneling is possible, maximum session connection time, billing method (prepaid, postpaid, both), billing server You can specify an ID or address, a list of certified W—APNs, whether to connect locally, whether to roam, and password, SIM card, and UIM card information.
- the terminal 101 accesses the mobile communication network or the wireless LAN
- the terminal 101 accesses the user information storage device 111 via the first WLAN relay device 105a, the authentication relay device 109, and the authentication server 110, Get the information you need.
- the terminal 101 also holds a user profile.
- the radio network controller 104 stores, in the cell location management unit 203, information on the cells under the radio network controller 104 itself and the WLAN access network 103 around them.
- FIG. 4 shows an example of an implementation method of the cell location management unit 203.
- the cell location management unit 203 includes the ID of the base station device 102 that communicates with the cell, the cell location 403, the cell radius 404, and the terminals that can be accommodated (3G, types of terminals 101 that can be accommodated such as wireless LAN)
- the connection information 405, the adjacent cell 406, and the wireless LAN cell the WLAN relay device 105 that is the communication partner of the wireless network control device 104 is stored as the WAG 407.
- Accommodable terminal type 402 indicates the type of terminal that can be accommodated in the cell, UMTS (Universal Mobile Telecommunication System) power, and 802.11. Also, position information is stored in the field of position 4003. The location information indicates latitude with a value starting with N or S and longitude with a value starting with E or W.
- the cell radius 404 is information indicating the size of a cell that can be communicated.
- the connection information 405 is information for accessing the base station apparatus 102 or the WLAN access network 103 that covers the cell. In this embodiment, a scrambling code is specified for UMTS, and an SSID and WEP key in the 802.11 standard are specified for wireless LAN.
- the field indicating the authentication method and the connection method in the connection information the moving speed and direction of the terminal 101 for position estimation, Field of movement acceleration, identifier indicating encryption method to support encryption, field for storing certificate or encryption key information required for encryption, and when using tunnel other than IPinlP method when connected to wireless LAN
- An identifier that indicates the tunneling protocol to support IP and information used for tunnel setting such as MPLS label when MPLS is used for tunnel), multiplexing identifier, QoS or SLA (Service Level Aggregation) content, packet
- the effect of this embodiment can be obtained even when a field for storing the sequence number of the frame is provided separately.
- Radio network control apparatus 104 predicts the destination cell of terminal 101a based on the location information included in cell location management section 203 and the location of cell of terminal 101a. Note that the location of the WLAN access network 103 is collected in advance by the WLAN relay device 105, and the WLAN access network 103 collected by the WLAN relay device 105 in response to an inquiry from the wireless network control device 104. It is also possible to construct data of the cell location management unit 203 by responding collectively with a set of location and cell ID of the WLAN access network 103.
- the target of the handover process between the mobile communication network and the wireless LAN is limited to the terminal 101 having a plurality of types of wireless interfaces such as the mobile communication network and the wireless LAN. It is also possible to have means for determining the terminal 101 having a plurality of wireless interfaces and the other terminals 101.
- an identifier such as IMSI that identifies a terminal 101 having multiple wireless interfaces is stored in the wireless network control device 104, and the identifier of the terminal 101 is already stored when a new terminal 101 enters or connects Of the terminal 101 having a plurality of wireless interfaces, and when the terminal 101 enters the cell, the user information storage device 111 or the terminal 101
- One method is to make an inquiry and check the number of wireless interfaces. In that case, the cell registration process or the following handover process between different networks may be executed only for the terminal 101 having a plurality of radio interfaces.
- terminal 101 is first packet-connected via a mobile communication network.
- Figure 5 shows the protocol stack for user data at this time.
- the packet communication method between terminal 101 and mobile network packet relay device 107 is the same as the packet communication method defined between UE and GGSN in 3GPP TS23.060. It is.
- the packet data relay device 108 is arranged between the mobile network packet relay device 107 and the public packet network 112, and the packet data relay device 108 assigns the remote IP address of the terminal 101. To do.
- the remote IP address of the terminal 101 is the same both when the terminal 101 is located in the cell of the mobile communication network and when it is located in the cell of the wireless LAN.
- the terminal When the remote IP address of 101 is shared between the mobile communication network and the wireless LAN, the same effect as this embodiment can be obtained. If a remote IP address different from the mobile communication network is assigned on the wireless LAN, the mobile communication network and the wireless LAN At the time of switching, the effect of the present invention can be obtained by notifying the upper node or the node to which the remote IP address has been assigned, and switching the packet path including user data according to the notification.
- FIG. 6 shows fields of information held by terminal 101 at this time.
- IMSI601 is an ID that uniquely determines the terminal 101 and is ID1.
- W— APN is the access point name of this interworking system, iw. Operator, com.
- the user ID is a character string that uniquely identifies the user using W—A PN as a domain name, and is IDl @iw. Operato r. Com.
- the user profile 604 is the same as the user profile included in the user information storage device 111.
- the wireless LAN MAC 605 is the MAC address of the wireless LAN interface. If the terminal 101 has a plurality of wireless LAN interfaces, this address may be plural.
- the Active Set 606 and quasi-Active Set 607 are identifiers indicating cells of a mobile communication network or wireless LAN with which terminal 101 is communicating, and are also referred to as a communicating cell set.
- the quasi-active set 607 is an identifier indicating a cell in which the terminal 101 is estimated to move in the future, and is also called a prediction target cell set.
- the Active Set 606 is Ml
- the quasi-Active Set 607 is “None”.
- the remote IP address 608 is an IP address used when the terminal 101 communicates with the opposite node 114, and has a value of 10.2.2.2.
- the local IP address 609 is an IP address used for communication with the WLAN access network 103 only when the wireless LAN is used. In the states (b) to (d), the local IP address 609 is used for the cell L1. 5. For Senore L2 10. 2. 2. 5!
- the PDG transport is a connection used when creating a tunnel with a PDG, and consists of a pair of an IP address and a port number.
- the IP address is set to 10. 1. 1.
- the port number is set to 10001.
- the radio network controller 104 estimates a cell that may be the destination of the terminal 101, and performs a sequence for setting a spare connection for the estimated cell. This will be described with reference to FIG.
- the radio network controller 104 includes a user of the terminal 101a in the terminal information management unit 202.
- the user ID includes a symbol string indicating a network to which the terminal 101a is connected and a character string used for identifying a user in the network.
- IMSI and W-APN Wireless Access Point Name
- base station apparatus 102 IMSI can be acquired by paging performed at the time of packet connection, but W-APN cannot be acquired. Therefore, in this embodiment, first base station apparatus 102a is assigned to terminal 101a. Get W-APN for it. This sequence is not necessary when the radio network controller 104 has already acquired the W-APN of the terminal 101.
- W-APN acquisition request 701 and W- APN The acquisition response 702 becomes unnecessary. Even if the user ID is directly acquired, the effect of this embodiment can be obtained.
- radio network controller 104 In W—APN acquisition request 701, radio network controller 104 outputs a request signal for acquiring W—APN, which is a domain name portion of the user ID, from terminal 101.
- the information field of the terminal 101 before the W-APN acquisition request 701 is the state (a) in FIG. 6, and the information field held by the radio network controller 104 described later is the state (a) in FIG.
- the information field held by the wireless LAN relay device 105 is in the state shown in state (a) of FIG.
- the radio network controller 104 When the packet is connected or when the measurement information or the terminal 101 is measuring the position, information related to prediction such as the position 'speed information of the terminal 101 is input from the terminal 101a to the radio network controller 104. At this time, the radio network controller 104 starts the estimation and registration process of the destination of the terminal 101. Inside the radio network controller 104, the terminal control unit 201 detects a trigger for starting this processing.
- the terminal control unit 201 attempts to acquire the W-APN, the user profile, and the MAC address of the wireless LAN from the terminal 101a. Therefore, W-APN acquisition request 7001 is created using IMSI. Further, the request is output to the terminal 101a using the base station communication unit 205.
- the terminal 101a uses the W-APN iw.operator.net used by the terminal 101a, the user profile UP 1 and the wireless LAN MAC address 00: 0E: 36: 4C: 9E: 38 is notified to the radio network controller 104.
- the terminal control unit 201 analyzes the information of the W—APN acquisition response 702 and extracts the W—APN (iw. Operator, net), user profile (UP1), and wireless LAN MAC address. To do.
- a user ID is created by concatenating IMSI and W-APN using @, and is stored in the terminal information management unit 202 together with the extracted information. In this case, the user ID is IDl @iw. Operator, net.
- the radio network controller 104 moves the terminal 10la depending on the position of the base station apparatus 102 to which the terminal 101a is connected and the state of the first WLAN access network 103a.
- the WLAN access network 103 that is the connection destination when Select based on at least one of conditions A to D.
- Network condition A is a WLAN access network 103 in which the distance between the position and the coverage area of the WLAN access network 103 is a certain value or less.
- the acquisition position a is a position measured by the terminal 101a itself using a device such as a GPS, and the acquisition position b is in the vicinity of the terminal 101a and has another position measurement / notification function. Is a position where the terminal 10 la is detected and notified using secondary radio such as Bluetooth or UWB (Ultra Wide Band), and the estimation method c is performed between one or a plurality of base station apparatuses 102 and the terminal 101. This is an estimation method using the amount of change in the radio field intensity of the channel.
- Network condition B is the WLAN access network 103 in which the moving direction of the terminal 101a is directed toward the cover area, and the time when the moving speed force is also calculated is equal to or less than a certain value.
- Network condition C is the WLAN access network 103 in which a contract for providing the user-powered interwork service of the terminal 101a is signed with an operator of the mobile communication network.
- Network condition D is a WLAN access network 103 provided by a wireless LAN connection service provider with which the user of the terminal 101a has a contractual relationship or another provider who has a roaming contract with the provider.
- the network condition E is the WLAN access network 103 with sufficient capacity.
- the capacity is the capacity of the WLAN access network 103 in the wireless section, the capacity of the wireless access network expressed by the number of terminals, and the hardware and software of the entire access points in the WLAN access network 103. It depends on the signal processing capacity, the line capacity between the WLAN access network 103 and the WLAN relay device 105, protocol processing capacity, routing capacity, and operator policy.
- the capacity of the WLAN access network 103 under the WLAN relay device 105 is the capacity to notify the wireless network control device 104 from the WLAN relay device 105 at regular intervals, the wireless network control device 104 to the WLAN Acquired by making an inquiry to the relay device 105.
- connection destinations may be selected.
- the connection destination may be determined based on any one of the network conditions A to E where the priority of the selection destination is appropriately determined.
- a cell adjacent to an active set indicating a connected cell is assumed to be a quasi-active set. Further, since the terminal 101a is located in the cell Ml under the first base station apparatus 102a, the Active Set is only Ml. Therefore, the quasi-active set is the cells M2, Ll, and L2 adjacent to Ml.
- the wireless network control device 104 transfers the user ID of the terminal 101a and the user profile to the first WLAN relay device 105a.
- the user ID is a symbol string that uniquely identifies the user.
- a NAI created from the user's IMSI and W-APN can be used.
- NAI has W— APN connected with @ like IDl @iw. Operator, net.
- the terminal control unit 201 of the radio network controller 104 creates a user profile from the user ID. Since the cell L1 is under the control of the first WLAN relay device 105a and the cell L2 is under the control of the second WLAN relay device 105b, the wireless network control device 104 transfers data to both, but the processing method is the same. 1WLAN relay device 105a is described only.
- cell M2 belongs to the same radio network controller 104, cell ID M2 is immediately added to the quasi-Active Set of terminal 101a, and terminal 101 side is updated by Active Set update 716 described later. Add M2 to Active Set.
- the WAG connection setting unit 301 registers the data of the terminal 101a in the terminal management unit 302.
- the state (a) in Fig. 9 shows the stored information field as an example of the terminal management unit 302 of the first WLAN relay device 105a.
- the terminal management unit 302 manages the active set and quasi-active set of the terminal 101 for each user ID.
- terminal 101a For user ID 901 of terminal 101a, user profile 902, Serving RN C (radio network control device controlling terminal 101) ID 903, wireless LAN MAC address of terminal 101 904, Active Set 905, Semi Active Set 906, One set of remote IP address 907 of terminal 101a is supported.
- Serving RN C radio network control device controlling terminal 101
- the terminal 101a may perform communication simultaneously with a plurality of WLAN access networks 103 under the same first WLAN relay device 105a.
- the WLAN access network A WLAN transport which is a connection that becomes a transport for each 103, is established, and a pair of an IP address and a port is assigned to each. Therefore, local IP address 908, transport with packet data relay device 108 IP layer IP address and port 909, transport with WLAN access network 103 IP layer IP address and port pair 910 has one user ID There may be multiple assignments to In addition, if there is a one-to-one correspondence between the WLAN relay device and the WLAN access network power S !, do not provide a WLAN transport!
- connection information other than the local IP address and port number is required to establish a communication connection, such as by performing encryption or compression in wireless LAN communication by terminal 101, By storing the information in the terminal management unit 302 and transmitting it together with the local IP address in the present embodiment, the same effect as in the present embodiment can be obtained.
- the Serving RNC 903 that controls the terminal 101a is the wireless network control device 104 that has output the wireless LAN preliminary setting request 704.
- ID of the radio network controller 104 is assumed to be R1.
- the first WLAN relay device 105a authenticates the mobile communication network using the user profile therein.
- the user of the terminal 101a is confirmed by the user information storage device 111 through the authentication relay device 109 and the authentication server 110 to be a user of the mobile communication network.
- the following messages are exchanged between the components.
- EAP / Request and EAP / Success specified in TS23.234 are used.
- Relay authentication request 706 and relay authentication response 708 between the authentication relay device 109 and the authentication server 110.
- the authentication relay device 109 only relays the message, and the EAPZRequest and EAPZSuccess specified in TS23.234 are used in the same way as the WAG authentication request 703 and WAG authentication response 708.
- Authentication acquisition processing 707 between the authentication server 110 and the user information storage device 111 Three In the GPP, as specified in TS23.234, when the authentication server 110 does not exist, the subscriber data in the user information storage device 111 is acquired. Further, the authentication server 110 confirms that the user of the terminal 101a can use the wireless LAN from the user information storage device 111.
- the WAG connection setting unit 301 uses the data of the terminal 101a of the terminal management unit 302 to authenticate the SIMZUIM force password, session key, etc. from the user profile as required. Extract necessary information and store WAG certification request 705.
- terminal management unit 302 confirms that terminal 101a can use the service of the mobile communication network.
- the first WLAN relay device 105a sets the required communication path from the packet data relay device 108 to the first WLAN access network 103a when the terminal 101a moves to the wireless LAN area. Create connection information. An IP-based tunnel is created between the packet data relay device 108 and the first WL AN relay device 105a, and between the first WLAN relay device 105a and the terminal 101a.
- the necessity of tunnel creation is specified in TS23.234.
- the tunnel creation methods include the IP—in—IP assumed in the first embodiment, Multi-Protocol Label Switching (MPLS), Generic Routing Encapsulation (GRE), IPsec, Layer 2 Tunneling Protocol (L2TP).
- MPLS Multi-Protocol Label Switching
- GRE Generic Routing Encapsulation
- IPsec IP Security
- L2TP Layer 2 Tunneling Protocol
- PPPoE Point-to-Point Protocol over Ethernet (registered trademark)
- FIG. 10 shows the tunnel creation processing in the present embodiment in a protocol stack diagram.
- both the packet data relay apparatus 108 and the terminal 101a need a tunnel and a remote IP layer.
- the first WL AN relay device 105a creates a tunnel with the packet data relay device 108 instead of the terminal 101a.
- This is the remote IP layer and tunnel (Tunneling in Fig. 10) 1001 of the first WLAN relay device 105a.
- the connection information required to set up these tunnels Information is transmitted to the terminal 101a via the mobile communication network.
- connection information of the terminal 101a is necessary for setting the tunnel.
- IP-in-IP is assumed as the tunneling method
- the local IP address used when the terminal 101a moves to the cell L2, which is necessary for setting the tunnel is the connection information.
- the connection information transmission operation is 1002, which makes it possible to acquire setting information obtained when the terminal 101a directly performs tunnel setting.
- the transport IP layer is set in the communication path between the packet data relay device 108 and the first WLAN relay device 105a.
- the local IP addresses and port numbers of the first WLAN relay device 105a and the packet data relay device 108 are required.
- the first WLAN relay device 105a When performing communication settings, the first WLAN relay device 105a needs to obtain a list of connectable visited networks (WLAN access networks 103) and select the connected visited network according to the user profile. . First, the first WLAN relay device 105a performs the wireless LAN IP address acquisition 710. The wireless LAN IP address acquisition 710 receives a plurality of IP addresses of packet data relay apparatuses 108 that can be connected from the WLAN access network 103 having the DNS server function using W—APN and the domain of the visited network. In the wireless LAN IP address acquisition 710, the WAG connection setting unit 301 creates and outputs a DNS query using the address in the domain part of the user ID.
- DNS server responds with a visited network, to a list set of the local IP address of the corresponding packet data gateway 108, the first 1 ⁇ ⁇ 1 ⁇ relay device 105 and.
- the WAG connection setting unit 301 refers to the contents of the user profile of the terminal management unit 302 and selects the optimum packet data relay apparatus 108.
- the packet data relay apparatus 108 for example, a method in which the packet data relay apparatus 108 in the home network is given priority over the packet data relay apparatus 108 in the visited network, or the charging rate is stored in the user profile.
- the method of giving priority to the least expensive charging network is recorded in the user profile in the order in which it is preferable to connect multiple packet data relay devices 108 or visited networks.
- the communication capacity is stored in advance, and the quality is selected from the one with high quality or the one with sufficient communication capacity, and one of the methods is used.
- the WAG connection setting unit 301 of the first WLAN relay device 105a After selecting the packet data relay device 108, the WAG connection setting unit 301 of the first WLAN relay device 105a outputs a tunnel setting notification 711 to the selected packet data relay device 108.
- the tunnel setting notification 711 determines the user ID of the terminal 101, the remote IP address, and one port for tunnel setting, and stores the port number together with the IP address of the first WLAN relay device 105a.
- the first WLAN relay device 105a and the packet data relay device 108 exchange filtering information and the like via the authentication relay device 109 in policy exchange 712.
- the packet data relay apparatus 108 to which the tunnel setting notification 711 is input performs authentication completion confirmation 713 to the authentication server 110 in order to confirm that the authentication to the first W LAN access network 103a has already been completed. . In this case, since the authentication process for the terminal 101a has already been performed, the completion of the authentication can be confirmed.
- the tunnel has an encryption function and a compression function
- the encryption method used in the tunnel the header compression method, or the payload compression method is required when setting the tunnel.
- Such setting information is extracted by the policy exchange 712.
- the packet data relay device 108 selects the port number used for the tunnel, the packet data relay device 108 performs tunnel creation processing 714 on the first WLAN relay device 105a.
- the tunnel creation processing 714 information on the tunnel between the packet data relay device 108 and the first WLAN relay device 105a and information for identifying the terminal 101a, for example, a user ID, is transferred from the packet data relay device 108 to the first WLAN relay device 105a. 1WLAN relay device 105a is notified.
- the WAG connection setting unit 301 of the first WLAN relay device 105a detects the local IP address of the packet data relay device 108 and the tunnel port number via the PDG communication unit 305, the packet is transmitted to the PDG transport 907 of the terminal management unit 302. Stores the local IP address and port number of the data relay device 108.
- the state of terminal management unit 302 of first wireless LAN relay device 105a at this time is shown in state (b) of FIG.
- Tunnel setting between first WLAN relay device 105a and user information storage device 111 is completed Then, a process of moving the connection information from the first WLAN relay device 105a to the terminal 1 Ola is performed as in the SIG 1002 of FIG. First, the first WLAN relay device 105 a outputs a tunnel setting notification 715 to the radio network controller 104.
- the WAG connection setting unit 301 receives the user ID of the terminal 101a, the wireless LAN connection information, and the local IP address (10.2.1.5) assigned by the tunnel setting. 3 Extracted from 02, creates tunnel setting notification 715, and outputs it to the radio network controller 104 using the RNC communication unit 304.
- the radio network controller 104 instructs the setting of the tunnel for the terminal 101a indicated by the tunnel setting notification 715 by the Active Set update 716 for the terminal 101a, Cell L1 is added to the quasi-active set of terminal 101a.
- the Active Set update can be used by adding a part for storing the information of the quasi-Active Set to the Active Set Update in 3GPP TS25.331.
- the terminal 101a sets a local IP address and a remote IP address in the first WLAN access network 103a area according to the contents of the Active Set update.
- the radio network controller 104 After the tunnel setting notification 715 is input via the WAG communication unit 206, the radio network controller 104 performs the following processing.
- the RNC connection setting unit 204 detects the completion of the tunnel setting in the wireless LAN based on the tunnel setting notification 715.
- the terminal control unit 201 since the terminal 101a is ready to communicate immediately after moving to the cell L1, the terminal control unit 201 notifies the terminal information management unit 202 to the local IP address in the wireless LAN acquired by the tunnel setting notification 715. Stores the IP address (10. 2. 1. 5). Also, add 1 to the quasi-active set.
- the local IP address is set to 10. 2. 1. 5 and an Active Set update 716 for adding L1 to the quasi-Active Set is created.
- the data is output to the first base station apparatus 102a via the station communication unit 205. This signal is output to terminal 101a by first base station apparatus 102a.
- the radio network controller 104 also applies L2 to the quasi-active set when it receives the tunnel setting notification 715 from the second WLAN relay device 105b for the cell L2! , And issue Active Set Update 716 to add cell L2 to terminal 101a.
- the Active Set becomes Ml
- the quasi-Active Set becomes M2, LI, L2.
- the state of terminal information management section 202 of radio network controller 104 is shown in state (b) of FIG. 8, and the state of information held by terminal 10 la is shown in state (b) of FIG.
- FIG. 11 showing a processing sequence.
- the radio wave strength is unstable and unsuitable for communication, and then the radio wave strength becomes strong and the communication error rate decreases and stable communication becomes possible.
- the terminal 101b moves to the coverage area of the first WLAN access network 103a (1101).
- the first WLAN access network 103a detects the radio wave of the terminal 101b.
- the terminal 101b is capable of issuing a probe of the 802.11 standard.
- the first WL access network 103a receives a beacon from the first WL AN access network 103a and outputs an association. Is notified of the MAC address of terminal 101b. Therefore, there is a case where the terminal 101b outputs association for the first time when the communication is stable, and the communication start procedure described later and the following procedure are executed almost simultaneously.
- the first WL AN access network 103a receives the frame being communicated.
- the MAC address of the terminal 101b can be detected.
- the wireless LAN radio wave detection notification 1102 is output to the first WLAN relay device 105a.
- the wireless LAN wave detection notification 1102 stores information necessary for wireless LAN connection such as the MAC address of the terminal 101b.
- first WLAN relay device 105a When wireless LAN radio wave detection notification 1102 is input, first WLAN relay device 105a outputs packet receivable notification 1103 related to terminal 101b to packet data relay device 108.
- the terminal management unit 302 is searched by the MAC address therein.
- the terminal 101b since the MAC address has already been registered, the user ID (802) IDl @iw. Operator, net of the terminal 101b can be acquired. Further, if the retrieved sub-active set of the terminal 101 includes a cell under the first WLAN access network 103a that has detected the wireless LAN radio wave, packet transmission from the packet data relay device 108 is started. In this case, since L1 is included in the quasi-active set of terminal 101b, it is determined to start packet transmission.
- a packet receivable notification 1103 urging packet transmission from the packet data relay device 108 is a notification indicating that the terminal 101b has entered the first WLAN access network 103a, and includes the user ID of the terminal 101b.
- the user ID of the terminal 101b and the PDG transport 909 acquired from the terminal management unit 302 are specified in the packet reception ready notification 1103, and the packet data relay device 1 08 is specified via the PDG communication unit 305. Output.
- the packet data relay apparatus 108 Upon receiving the packet receivable notification 1103, the packet data relay apparatus 108 selects the tunnel in which the user ID of the terminal 10 lb is also set. Then, the packet to the terminal 101b input from the public packet network 112 is output via the tunnel to the first WLAN relay device 105a (downlink data transmission 1104). At this time, since packet transmission has already been performed from the packet data relay device 108 via the mobile network packet relay device 107 and the packet control device 106, the packet data relay device 108 duplicates the received packet and performs mobile communication. It is output to both the mobile network packet relay device 107 on the network side and the first WLAN relay device 105a on the wireless LAN side. At this time, packets transmitted by packet transmission are discarded by the first WL AN relay device 105a until a terminal connection notification 1106 described later is input.
- terminal 101b measures the radio wave strength or communication strength of the wireless LAN and determines whether or not stable communication is possible. If terminal 101b determines that communication has stabilized after entering the area of first WLAN access network 103a, terminal 101b performs wireless LAN connection processing 1105 with first WLAN access network 103a, and performs communication using the already acquired local IP address. Start. In the 802.11 standard, connection processing is performed using Probe and Association procedures.
- the first WLAN access network 103a When the first WLAN access network 103a detects that the terminal 101b is connected, the first WLAN access network 103a outputs a terminal connection notification 1106, in which information necessary for the wireless LAN connection of the terminal 101b, such as a MAC address, is relayed to the first WLAN Notify device 105a.
- the WAG connection setting unit 301 detects the terminal connection notification 1106 via the WLAN communication unit 303, and the user ID and PDG transport corresponding to the MAC address are detected from the terminal management unit 302. Get WLAN transport. In this case, obtain the IP address 10.1.1.1 and port 10001 of the PDG transport port 909 corresponding to the terminal 101b, and the IP address 10.2.1.1 and port 10001 of the WLAN transport.
- the WAG connection setting unit 301 selects a tunnel related to the terminal 101b between the first WLAN relay device 105a and the packet data relay device 108 based on the information power necessary for wireless LAN connection, and passes through the tunnel. Then, the packet transmitted from the packet data relay device 108 is output to the first WLAN access network 103a using the selected tunnel (downlink data transmission 1107).
- the first WLAN relay device 105a outputs a packet from the first WLAN access network 103a to the packet data relay device 108 in order to relay the packet of the terminal 101b to the packet data relay device 108 (uplink data transmission). 1108).
- the WAG connection setting unit 301 uses the cell L1 of the first WLAN access network 103a in the data of the terminal 101b in the terminal management unit 302 in the first WLAN relay device 105a. Change from semi-active set to active set. The timing of this change is even when the WLA N transmission start notification 1109 is output.
- the first WLAN relay device 105a notifies the wireless network control device 104 that the terminal 101b power communication has been started by the WLAN transmission start notification 1109.
- WAG connection setting section 301 stores the WLAN transmission start notification 1109 in the user ID of the terminal 101 b and outputs it to the radio network controller 104 via the RNC communication unit 304.
- the radio network controller 104 changes the cell L1 of the terminal 101b from the semi-active set to the active set.
- the RNC connection setting unit 204 detects the input of the WLAN transmission start notification 1109 by the WAG communication unit 206 and notifies the terminal control unit 201 of it.
- the terminal control unit 201 adds L1 to the Active Set of the terminal 101b in the terminal information management unit 202 and deletes L1 from the quasi-Active Set.
- the terminal information management unit 202 of the radio network controller 104 is in the state shown in the state (c) of FIG.
- an Active Set update 1110 is generated to instruct to change the cell L1 of the terminal 10 lb from the quasi-Active Set to the Active Set, via the base station communication unit 205.
- an Active Set update 1110 is generated to instruct to change the cell L1 of the terminal 10 lb from the quasi-Active Set to the Active Set, via the base station communication unit 205.
- the terminal 101b to which the Active Set update 1110 is input updates the data of the internal Active Set according to the Active Set update 1110.
- the Active Set of the terminal 101b becomes the cell Ml and the cell L1, and the data is stored in both the terminal 101b and the radio network controller 104.
- the terminal 101b measures the radio field strength and communication state (throughput, packet loss rate, error rate BER: Bit Error Rate) with the first WLAN access network 103a, and the wireless network control device Notify 104 as measurement information 1111.
- the measurement report of TS25.331 can be used for this. Further, since communication with the WLAN is established, it may be transmitted via the first WLAN access network 103a.
- Radio network controller 104 sets Active Set to cell L Make a decision to make it only 1. Also, in this embodiment, since the adjacent cell to the Active Set is a quasi-active set, the process of changing the cell Ml from the active set to the quasi-active set and deleting the cells M2, L2 from the quasi-active set Do.
- the terminal control unit 201 updates the Active Set and the quasi-Active Set for the cells Ml, M2, and L2 from the Active Set update 1111 and the second WLAN relay unit 105b from the quasi-Active Set of the terminal 1 Olb. Create WAG Active Set Update 1111 to delete cell L2.
- the Active Set change processing for the cells Ml and M2 of the mobile communication network is performed using the Active Set update 1111 that performs the above-described processing on the cells Ml, M2, and L2.
- the terminal 101 changes the cell Ml from the Active Set to the quasi-Active Set, and deletes the cell M2 from the quasi-Active Set.
- This procedure can be executed by the same procedure as the Active Set update specified in 3GPP TS25.331.
- the output from the radio network controller 104 is output via the base station communication unit 205.
- the WLAN access network 103 under the control of the second WLAN relay unit 105b does not enter the Active Set and quasi-Active Set of the terminal 101b, so the data of the terminal 101b itself is also deleted. This is also notified to the radio network controller 104.
- the WAG Active Set update 1113 the information held by the terminal 101b becomes the state shown in FIG. 6 (this is the state. Further, the information field of the wireless LAN relay device 105 becomes the state (c) in FIG.
- control plane data for control also passes through the first WLAN access network 103a.
- Figure 12 shows an example of a protocol stack for transmission. Basically, it is similar to the protocol stack for one user data, and the terminal 101 uses a remote IP address. In the network, tunnels are used to transmit RRC data, which is a protocol for terminal control.
- the first WLAN relay device 105a and the wireless network control device 104 are connected, and the connection information / authentication information of the terminal 101a is transmitted and received between the two, thereby performing a handover based on the prediction.
- the power of the realized example Even if the connection destination of the wireless network control device 104 in the wireless LAN is the IWL AN access network 103a, the same function as the first WLAN relay device 105a in this embodiment is provided in the IWL AN access network 103a. By providing it, the same effect as in the present embodiment can be obtained.
- IMSI is used as an ID for identifying terminal 101
- U-RNTI is used as an ID for identifying terminal 101 instead of the force IMSI obtained from W-APN from terminal 101. If data used for wireless LAN authentication such as IMSI or W-APN is acquired from the terminal 101 using the (UTRAN Radio Network Temporary Identifier), the same sequence as in this embodiment is applied. The same effect as the form can be obtained.
- the wireless network control device 104 determines whether or not handover can be performed according to the content of the notification.
- the radio network controller 104 determines that a handover is to be performed.
- a request for updating the contents of the Active Set and the quasi-Active Set is output to the first WLAN relay device 105a, and thereafter, the packet data relay device 108 to the terminal 101b receive the first WL AN in the same manner as in this embodiment. Establish a connection via relay device 105a.
- terminal 101 has position information consisting of at least one of the position, speed, acceleration, and movement direction of terminal 101, and the position information is notified to radio network controller 104, the radio network The control device 104 can reliably predict the destination cell.
- a packet reception notification is sent from the radio network controller 104 to the packet data relay device. It is also possible to start packet transmission from the packet data relay device 108 to the first WL AN relay device 105a.
- the first WLAN relay device 105a does not use IMSI.
- an identifier such as IMSI that can uniquely specify the terminal 101 is used. The same effect can be obtained even if there is.
- the destination of the terminal 101 is predicted, the authentication 'connection process in the predicted WLAN access network 103 is performed, and the destination cell is moved or just before the movement.
- packet communication can be started immediately upon arrival at the destination WLAN access network 103.
- the operation of the second exemplary embodiment will be described with reference to FIG.
- the first WLAN access network 103a detects disconnection of packet transmission when there is no frame reception by the MAC address of the terminal 101b for a certain time (disconnection detection 1301). Specifically, after receiving a frame, The timer is updated every time a frame is received by the MAC address of the terminal 101b. When the timer expires and disconnection is detected, the WLAN disconnection notification 1302 including the MAC address of the terminal 10 lb is output to the first WLAN relay device 105a to the first WLAN relay device 105a.
- the first WLAN relay device 105a controls the WLAN communication unit 303 to stop packet transmission to the first WLAN access network 103a (transmission stop 1303).
- the WAG connection setting unit 301 detects the WLAN disconnection notification 1302 via the WAN communication unit 303
- the information of the terminal management unit 302 including the MAC address of the terminal 101b therein is searched.
- the information of the terminal 101b is found, and the Serving RNC 903 that designates the radio network controller 104 and the PDG transport 909 that designates the packet data relay apparatus 108 are acquired.
- the packet data relay device 108 and the radio network controller 104 specified by them are notified that the communication of the cell L1 has been stopped.
- This stop notification is output to the packet data relay device 108 via the PDG communication unit 305 as a communication failure notification 1304 including the ID of the cell L1 that cannot communicate with the user ID of the terminal 101b.
- the packet data relay device 108 stops packet transmission related to the terminal 101b to the first WLAN relay device 105a (transmission stop 1305).
- the WAG connection setting unit 301 outputs the communication stop notification 1306 related to the terminal 101b to the radio network controller 104 via the RNC communication unit 304.
- the radio network controller 104 changes the cell L1 from Active Set to quasi-Active Set.
- the RNC connection setting unit 204 detects the communication failure notification 1306 via the WAG communication unit 206 and notifies the terminal control unit 201 of it.
- the terminal control unit 201 performs an Active Set update process with the cell L1 as a semi-Active Set for the terminal 101b and the first WL AN relay apparatus 105a.
- the packet control apparatus 106 is notified that communication with the terminal 101b is impossible. In this case, there is no cell in the Active Set because only L1 is in the Active Set. Therefore, the terminal control unit 201 is a terminal A disconnection notification 1307 is output to the SGSN 206 via the SGSN communication unit 207 that the communication between 101b and the radio network controller 104 has been disconnected.
- the packet control device 106 confirms the state of the terminal 101b. In this case, since there is no connection between the terminal 101b and the wireless network controller 104 other than the wireless network controller 104, the packet controller 106 disconnects the packet communication of the terminal 101b (3GPP TS23.060 PS Serving Connection Release) I do.
- the GGSN connection information deletion process 1308 and the PDG connection information deletion process for deleting the context information that is the management information related to the terminal 101b from the packet control apparatus 106 to the mobile network packet relay apparatus 107 and the packet data relay apparatus 108 Perform 1309. 3GPP 23.060 Delete PDP Context RequestZResponse is used from the packet control device 106 to the mobile network packet relay device 107. Accordingly, the mobile network packet relay device 107 and the packet data relay device 108 delete the context information of the terminal 101b in each of them.
- the packet control device 106 disconnects the connection related to the terminal 101b with the radio network control device 104 (1310).
- the radio network controller 104 deletes the context information related to the terminal 101b, so that the first WLAN relay device 105a and the second WLAN relay device 105b Then, WAG connection information deletion processing for deleting an entry related to the terminal 101b of the terminal management unit 302 is performed.
- the terminal control unit 201 is notified that the connection with the packet control device 106 related to 101b has been disconnected. To do.
- Terminal control section 201 deletes information related to terminal 101b from terminal information management section 202.
- WAG connection information deletion processing 1311 and WAG connection information deletion processing 1312 are output to the first WLAN relay device 105a and the second WLAN relay device 105b that control the cells LI and L2, which are the active set of the terminal 101b.
- the WAG connection setting unit 301 detects the WAG connection information deletion process 1310 Z1311 via the RNC communication unit 304, the information of the terminal 101b is deleted from the terminal management unit 302.
- the WAG connection setting unit 301 sends the response of the result of the WAG connection information deletion process 1310Z1311 to the RN Output to the radio network controller 104 via the C communication unit 304.
- first WLAN access network 103a when first WLAN access network 103a detects that communication with terminal 101 is disabled, it stops packet transmission, and packet data relay apparatus 108 and Reduce the bandwidth usage of the line between 1WLAN repeater 105a.
- the wireless network control device 104 is notified of the packet transmission suspension, the Active Set is changed to a quasi-Active Set, the wireless network control device 104 notifies the packet control device 106 that there is no Active Set, The packet control device 106 disconnects the connection to the wireless network control device 104, thereby making it possible to reduce the resource consumption of each node of the mobile communication network and the wireless LAN.
- the mobile network power WL AN can be moved.
- this embodiment attempts to connect to the wireless LAN at first, the connection setting of the mobile communication network in the packet control device 106 is completed as in the first embodiment. Suppose the state.
- FIG. 14 is a block diagram showing an internal configuration of packet control apparatus 106 according to the present embodiment.
- the SGSN connection setting unit 1401 has a function of controlling the packet control device 106 and performing connection setting processing performed by the SGSN in the 3GPP network.
- the terminal state management unit 1402 stores the terminal state necessary for the control performed by the SGSN connection setting unit 1401. For example, primary PDP information (Primary PDP context) of GPRS specified in 3GPP TS23.060 and TS29.060 is stored.
- the GPRS control unit 1403 has a function of performing GPRS protocol conversion.
- the SGSN in 3GPP is Location management services that are not related to the service are also provided, but the configuration to realize other services is omitted.
- the RNC communication unit 1404 and the GGSN communication unit 1405 are means for communicating with the radio network control device 104 and the mobile network packet relay device 107, respectively, and include protocol stack and network interface software node software.
- the wireless LAN power also secures a communication path to the packet control apparatus 106 of the mobile communication network, and the terminal 101c uses the communication path to send information for packet connection to the packet control apparatus 106.
- the ATTACH processing method to be registered will be explained.
- FIG. 15 shows an operation of terminal 101c.
- 16 to 21 show field diagrams showing terminal data held by each node
- FIGS. 16, 17, 17, 19, 20, and 21 respectively show the terminal 101c and the wireless network.
- the terminal information stored in the control device 104, the WLAN relay device 105, the packet control device 106, the mobile network packet relay device 107, and the packet data relay device 108 is shown.
- the state (a) is when the tunnel creation process shown in FIG. 22 is completed
- the state (b) is when the WLAN connection setting is completed
- the state (c) is the process of switching from the WLAN card to the mobile communication network.
- Indicates information at completion. 22 to 24 are diagrams showing the operation of the ATTACH process of the terminal 101c in the wireless LAN network.
- FIG. 22 is a diagram showing processing until the terminal 101c is connected to the wireless LAN network and processing in which the terminal 101c performs setting with the wireless network control device 104 via the wireless LAN network.
- the terminal is not operating before the processing is performed, and the terminal 101c is in the stopped state 2201.
- the packet control device 106 does not store information related to the terminal 101c, and the state of mobility management (abbreviation of MM, Mobility Management) in GPRS is PMM-detached.
- MM Mobility Management
- the terminal 101c determines whether the wireless LAN or the mobile communication network has been detected (FIG. 15, S1501). When the wireless LAN is detected, the terminal 101c performs a connection process to the wireless LAN (S 1502). As a result, the terminal 101c executes the processes from the local connection process 2202 to the wireless LAN IP address acquisition 2204 shown in FIG. These are the same as the local connection processing 2802 to the wireless LAN IP address acquisition 2804 in the prior art.
- the second WLAN access network 103b passes the IP address for local connection to the terminal 101c, the second WL AN access network 103b notifies the second WLAN relay device 105b that the terminal 101c is connected. 2205 is output.
- This content is the same as the terminal connection notification 1106 in the first embodiment.
- information on the newly connected wireless LAN terminal is output as a terminal connection notification 2205 to the WLAN access device corresponding to the WLAN access network that detected the connection.
- the output timing differs depending on whether the terminal 101c has acquired an IP address.
- the terminal 101c since the terminal 101c has already acquired the IP address of the output source, the power at which the terminal connection notification 1106 is output immediately after the wireless LAN connection processing is completed. Since the IP address of is undecided, notification is made after passing the IP address.
- the second WLAN relay device 105b refers to the terminal state management unit 1402, and the terminal 101c is connected to the mobile communication network. It is determined whether or not.
- the terminal state management unit 1402 since the terminal 101c was in a suspended state before connecting to the WLAN, the terminal state management unit 1402 does not store information on the terminal 101c, and is determined as a new terminal that is not connected to the mobile communication network. To do.
- the second WLAN relay device 105b outputs the IP address of the radio network controller 104 associated with the first WLAN relay device as the RNC address notification 2206 to the terminal 101c.
- terminal 101c receives the RNC address notification from second WLAN relay device 105b (S1503).
- the terminal 101c is in a state where it can always communicate with the wireless network control device 104 while it is in the mobile communication network, and if it exists in a wireless LAN only area, it communicates with the wireless network control device 104 via the wireless LAN. There must be. For this reason, the second WLAN relay device 105b uses the RNC address notification 2206 to notify the IP address of the radio network controller 104 and the cell number (Cell Identity, etc.) of the WLAN area. Since the terminal 101c exists in the wireless LAN network, the second WLAN relay device 105b does not perform subsequent processing on the wireless LAN network.
- terminal 101c since terminal 101c is initially stopped, it is necessary to notify the RNC address in order to realize a connection via the wireless LAN network between wireless network control apparatus 104 and terminal 101c.
- Power of mobile communication network as in the first embodiment
- the terminal 1 When moving to a wireless LAN network, the terminal 1 is placed in the area of the mobile communication network.
- the wireless network control device 104 is notified of the IP address of the wireless network control device 104 via the base station device 102, so that the RNC address notification need not be performed.
- the terminal 101c Upon receiving the IP address of the radio network controller 104, the terminal 101c performs a tunnel creation process with the packet data relay apparatus 108 (S1504). As a result, tunnel setting notification 711 to tunnel creation 714 shown in FIG. 22 are performed. These processes are the same as the processes up to tunnel creation request 1605 and tunnel creation 1608 in the prior art.
- the terminal 101c determines the presence / absence of the IP address of the radio network controller 104 (S 1505). In this embodiment, since the terminal 101c holds the IP address, the UTRAN setting operation is performed by establishing the RRC connection (S1506).
- the terminal 101c requests an RRC connection via the wireless LAN network from the wireless network control device 104 by an RRC connection request notification 2211.
- This request corresponds to RRC CONNECTION RE QUEST in TS25.331.
- the terminal ID (such as IMSI) and the cell number are transmitted to the radio network controller 104 via the second WLAN relay apparatus 105b.
- these signals are transmitted through a common channel or a dedicated channel.
- these signals since these signals pass through a wireless LAN network, they are transmitted as IP packets.
- the points to be relayed are indicated by black circles.
- the radio network controller 104 Upon receiving the RRC connection request notification 2211, the radio network controller 104 uses the terminal information management unit 202 to check whether the ID of the terminal 101c is new or not. In the case of the present embodiment, since terminal 101c was originally in the stopped state 2201, it is determined to be new. In the case of new, the radio network controller 104 creates an entry for the terminal 101c in the terminal information management unit 202 and confirms the current location indicated in cell units. In the present embodiment, since terminal 101c exists in cell L2, location registration of cell L2 is performed.
- the radio network controller 104 performs RRC connection RRC connection setting request 2212 (3GPP
- the terminal 101c can make an RRC connection, the RRC connection setup response 2213 (RRC CONNECTION SETUP COMPLETE in 3GPP TS25.331) is sent to the radio network controller.
- the data is transmitted to the wireless network control device 104 via the device 104.
- the terminal 101c is registered in the UTRAN controlled by the radio network controller 104.
- This state is the state (a) shown in FIGS. In this state, the terminal 101c is registered in the packet control device 106 and the mobile network packet relay device 107 !, NA! / ,.
- terminal 101c performs location registration processing for packet control apparatus 106 (S 1507).
- This process is shown in the sequence diagram of FIG. 3
- location registration to SGSN is performed by ATTACH processing.
- This embodiment differs from the 3GPP specifications in the following two points.
- the signal to the SGSN is relayed by the second WLAN access network 103b, the second WLAN relay device 105b, and the wireless network control device 104 of the wireless LAN network.
- the ability to integrate ATTACH processing that performs location registration for both circuit-switched domains and circuit-switched domains in the core network.
- ATTACH processing to the packet switching domain is performed.
- the terminal 101c since the terminal 101c does not have the address of the packet controller 106, the terminal 101c transmits the signal to the core network by RRC (Direct Transfer in 3GPP TS25.331, Uplink Direct Transfer, Downlink Direct Transfer) is used.
- RRC Direct Transfer in 3GPP TS25.331, Uplink Direct Transfer, Downlink Direct Transfer
- wireless network relay device 104 determines whether it is Direct Transfer, and the signal from terminal 101c is RANAP (RAN Application Part. 3GPP
- the packet is output to the packet controller 106 using the protocol between the core network and the RNC in 3GPP TS25.
- the packet control device 106 outputs a signal for the terminal 101c using RANAP.
- the location registration request 2301 or the like represents the relay function of the radio network controller 104 as an arrow break.
- a packet transmitted from the terminal 101c to the radio network controller 104 is relayed by the second WLAN access network 103b and the second WLAN relay device 105b.
- the force is shown in black circles at the points to be relayed. The listing is omitted.
- Information elements such as headers and tailors that indicate GPRS-related control signals are stored in each message that is not transmitted by the method using Direct Transfer for relaying signals between the terminal 101c and the packet control device 106. Even if the method in which the radio network controller 104 relays a signal determined to be a GPRS signal or the like related to the packet controller 106 based on the information element can be communicated between the terminal 101c and the packet controller 106, the effect of the present embodiment Is obtained.
- the terminal 101c transmits a location registration request 2301 to the packet control device 106, and requests the bucket control device 106 for location registration. This corresponds to the Attach Request of TS23.060.
- the packet controller 106 receives the position registration request 2301, the following four processes are performed between the terminal 101c and the packet controller 106.
- the ID request 'response processing 2302 in which the terminal 101c responds is performed.
- (2) 3GPP authentication processing 2303 for authenticating the packet controller 106 power terminal 10 lc is performed.
- TS23.060 SGSN and and Ciphering Request, Authenticatio n and Ciphering Response.
- Send Authentication Info and Send Authentication Info Ack signals are transmitted between SGSN and HLR.
- (3) IMEI confirmation processing 2304 for authenticating the terminal 101c is performed. Note that this sequence need not be performed. In TS23.060, it corresponds to Identity Request and Identity Response.
- (4) location update processing is performed on the user information storage device 111 that inputs location information to the user information storage device 111. The location update process is performed between the packet control device 106 and the user information storage device 111.
- Location update request 2305 executed when the subscriber data insertion 2306 and the location update response 2307 are exchanged.
- Location update request 2305, subscriber data insertion 2306, and location update response 2307 correspond to Update Location, Insert Subscriber Data, Insert Subscriber Data Ack, and Update Location Ack of TS23.060, respectively.
- a location registration response 2309 indicating that the ATTACH process is completed is transmitted from the packet control device 106 to the terminal 101c.
- the terminal 101c performs the PDP information activation key process (S1508) following the location registration process (S1507).
- Figure 24 shows the PDP information of terminal 101c of packet control device 106 (TS23.060 PDP (Packet Data Protocol, IP in this embodiment) so that data can actually be transmitted.)
- Context Is a diagram showing processing for initializing
- the terminal 101c transmits a PDP information activation key request 2401 to the packet control device 106.
- IMSI1601 ID1
- user ID1602 IDl @ iw.operat or.com
- user profile 1604 UP1
- Remote IP address 1608 10.2.2.2.2
- PDG transport 1610 IP address 10.1.1.1, port 10001
- a PDP information activation request 2401 is input to the RNC communication unit 1404, and the SGSN setting unit 1401 analyzes the contents.
- the contents are registered in the terminal state management unit 1402.
- the packet controller 106 creates a request for the secondary PDP information activation 2402 including the IP address of the terminal 101c, and the mobile network packet relay device via the GPRS controller 1403 and the GGSN communication unit 1405 Send to 107.
- the request for secondary PDP information activation key 2402 includes IMSI1901 (ID1), user ID1902 (IDl @iw. Operator, com), and the PDG IP address.
- IMSI1901 ID1
- user ID1902 IDl @iw. Operator, com
- PDG IP address PDG IP address
- APN Access Point Name, iw. Operator, com
- APN Access Point Name, iw. Operator, com
- GGSN address 1904 and PDG address 1905 indicate the addresses of mobile network packet relay device 107 and packet data relay device 108, respectively.
- MM state 1906 and PDP state 1907 indicate the mobility management (MM) state and PDP state in GPRS, respectively.
- the MM state 1906 is PMM—detached when disconnected, and PMM—attached when location registration is completed.
- the PDP status indicates the presence or absence of communication, and becomes ACTIVE when communicating, and INACTIVE when there is no communication.
- the Routeing Area 1909 stores the ID of the Routeing Area of the terminal 101.
- cells Ml and M2 of the mobile communication network constitute a Routing Area: 3G
- cells L1 and L2 of the wireless LAN network constitute a Routeing Area: WLAN.
- FIG. 20 is a field diagram showing secondary PDP information.
- Secondary PDP information is a GPRS Secondary PDP context and manages terminal information.
- the packet control device 106 performs RAB setting 2403 for establishing RAB (Radio Access Bearer) which is a communication path of user data.
- RAB Radio Access Bearer
- processing corresponding to RAB Setup Request, RAB Setup Response, RADIO BEARER SETUP, and RADIO BEARER SETUP RESPON NSE in 3GPP TS 25.4 13 RANAP is performed.
- the packet control device 106 performs secondary PDP information update processing 2404 for the mobile network packet relay device 107.
- the contents of RAB establishment are reflected in the secondary PDP information related to the terminal 101c of the mobile network packet relay apparatus 107.
- the packet controller 106 transmits a PDP information activation response 2405 to the terminal 10 lc.
- connection related to the cell L2 is registered in the UTRAN and the packet controller 106.
- packet data is transmitted via the wireless LAN network, and mobile network packet relay device 107 is not used for packet relay. Therefore, secondary PDP information activation 2402 and secondary PDP information activation are not used.
- the 2404 can be omitted.
- the terminal 101c assigns the cell Ml to the semi-active in order to perform the position prediction process. Processing for registration as a Set is performed (S1509). After the connection related to the terminal 101c is established, the radio network controller 106 searches the cell location management unit 203 for a cell adjacent to the cell L2. As a result, since only the cell Ml is extracted, the process of updating the Active Set to register the cell Ml is started. Note that in this embodiment, all adjacent cells are used as criteria for determining cells that fall within the quasi-active set. However, if more detailed information on the communication state is collected, it is determined from adjacent cells. Furthermore, it is possible to narrow down the quasi-active set to cells where the terminal 101c is likely to move.
- the radio network controller 104 performs an Active Set Update request (3GPP RRC: Active Set Update) 2406 as the Active Set cell L2 and the quasi-Active Store cell M2 of Set and output to terminal 101c via wireless LAN network.
- terminal 101c determines that there is no problem in adding these pieces of information, and adds cell L2 and cell Ml to the Active Set and the quasi-Active Set, respectively.
- the terminal 101c then outputs an Active Set update response (ACTIVE SET UPDATE COMPLETE in 3GPP TS25.331) 2407 to the radio network controller 104 to notify that the Active Set update processing has been completed.
- the radio network controller 104 sets the Active Set and Quasi-Active Set of the terminal 101c in the terminal information management unit 202 to L2 and Ml, respectively. This completes the registration of the data of the terminal 101c to the UTRAN controlled by the radio network controller 104.
- Figure 25 shows the connection of the terminal 101c when the connection via the wireless LAN network of the terminal 101c existing in the cell L2 of the wireless LAN network is established and moves to the cell Ml during communication. It is a figure which shows the process switched to via a network.
- terminal 101c determines the power of detecting a wireless LAN or a mobile communication network.
- terminal 101c enters cell Ml, it proceeds to 3G link establishment processing to detect a mobile communication network, and a link is established between base station apparatus 102a between radio network control apparatus 104 and terminal 101c (S1510).
- the Radio Link Setup procedure described in NBAP (Node B Application Part) of 3GPP TS25.433 is used.
- the terminal 101c performs an Active Set update process for updating the cell position (S151 Do. In this process, the terminal 101c first transmits a cell update request 2502 to the radio network controller 104.
- the cell update request 2502 is the power to assume the Cell Update of 3GPP TS25.331 If the radio network controller 104 is switched, the SRNS Relocation procedure is used. The same effect can be obtained by using the URA Update procedure when the location of the URA is known in URA (UTRAN Registration Area) units.
- the radio network controller 104 When the radio network controller 104 receives the cell update request 2502, the radio network controller 104 sets the Active Set and the quasi-Active Set of the terminal information management unit 202 to Ml and L1, respectively, and sends a cell update response to the terminal 101c. Send 2503. Thus, the movement of the terminal 101c to the cell Ml is registered in the radio network controller 104.
- the terminal 101c determines whether or not the terminal 101c has moved to the mobile communication network while connected to the wireless LAN network (S1512).
- RA update is performed (S15 13). Registration with the packet controller 106 is performed in the RA update process, and the packet transmission path is switched from the wireless LAN network to the mobile communication network.
- the terminal state management unit 1402 of the packet control device 106 changes from WLAN to 3G.
- the terminal 101c transmits an RA update request 2504 for performing RA update processing and location registration processing for both the packet switching domain and the circuit switching domain to the packet control device 106.
- the packet control device 106 performs a secondary PDP update processing 2505 for the mobile network packet relay device 107 and a location information update processing 2506 for the user information storage device 111.
- the secondary PDP information update process 2505 parameters for mobile communication network connection are registered in the mobile network packet relay apparatus 107 as in the above-described secondary PDP information update process 2404.
- the contents executed in the above three sequences of the location update request 2305, subscriber data insertion 2306, and location update response 2307 are the same, and the user is informed that the terminal 101c has entered the mobile communication network area. Register in the information storage device 111.
- a route change request 2507 for switching the packet data from the node 114 via the mobile communication network is output from the packet controller 106 to the packet data relay device 108.
- the two are not directly connected, but since these are transmitted as IP packets, the mobile network packet relay device 107 relays the packets.
- the packet data relay device 108 In transmission via the mobile network packet relay device 107 after switching, there are several options for the transmission method with the packet data relay device 108. All of them need to be based on IP, but tunneling methods such as Mobile IP, GTP (GPRS Tunneling Protocol), and IP-in-IP can be used. When using these tunnel methods, the input side device (packet data relay device 108 or mobile network packet relay device 107) adds the part of the protocol selected to the original packet header and performs the control. The device on the side needs to release the capsule and extract the original packet data.
- tunneling methods such as Mobile IP, GTP (GPRS Tunneling Protocol), and IP-in-IP can be used.
- the input side device packet data relay device 108 or mobile network packet relay device 107 adds the part of the protocol selected to the original packet header and performs the control. The device on the side needs to release the capsule and extract the original packet data.
- the packet data relay device 108 changes the tunnel creation method.
- the packet data relay apparatus 108 performs U-plane switching processing according to the path change request 2507 and outputs a path change response 2508 to the packet control apparatus 106.
- the packet controller 106 transmits an RA update response 2509 to the terminal 101c, and the processing is performed on the mobile communication network side. Indicates completion. This completes the registration process for cell Ml and cell L2.
- the same effect can be achieved by the method in which the cell update request 2502 is output from the terminal 101c, and the cell update process is performed from the radio network controller 104 using the Active Set Update procedure.
- the wireless network control device 104 has a packet division / integration function, it is possible to simultaneously connect using both the mobile communication network and the wireless LAN network.
- the quasi-Active Set registration sequence is shown by a quasi-Active Set (L2) registration process 2 511 and a cenore (M2) registration process 2512.
- the Senole L2 registration 2511 is a process similar to the process of updating the Active Set from the signal 704 to the signal 716 in FIG. 7 and the registration of the cell M2.
- the packet control device 106 deletes the tunnels related to the mobile network packet control device 107 and the packet data relay device 108.
- the packet control apparatus 106 instructs the radio network control apparatus 104, and the Active set of the terminal information management unit 202 of the radio network control apparatus 104 is also not registered.
- the wireless network control device 104 can It is possible to control terminals existing only in the area.
- the wireless network control device 104 relays the signal between the terminal 101c and the packet control device 106 with protocol conversion, so that even when the terminal 101c does not have the address of the packet control device 106, the wireless communication is performed.
- the communication when a plurality of packet control devices are connected to the same wireless network control device 104 is made possible.
- the packet control device 107 switches the packet data from the opposite node 114 by the route change request 2507 to the packet data relay device 108.
- the effect of shortening the time required for switching can be obtained.
- the wireless communication system includes a WLAN relay device that controls connection of one or more wireless LAN access (Local Area Network) networks. Among the input information, the communication with the mobile communication network and the wireless LAN network.
- the terminal has a configuration that outputs necessary connection information to the terminal when a terminal capable of communication is performed on the wireless LAN network, and implements a seamless handover between the mobile communication network and the wireless LAN. It is useful as a wireless communication system.
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- Small-Scale Networks (AREA)
Abstract
Description
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CN2005800424652A CN101077031B (zh) | 2004-12-15 | 2005-12-07 | 无线电网络控制器、无线接入网关、无线电通信系统、以及无线电通信系统的通信方法 |
US11/792,370 US8073446B2 (en) | 2004-12-15 | 2005-12-07 | Radio network controller, wireless access gateway, radio communication system, and communication method for radio communication system |
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JP2005109202A JP4703238B2 (ja) | 2004-12-15 | 2005-04-05 | 無線網制御装置、無線lan中継装置、無線通信システム及び無線通信システムの通信方法 |
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Also Published As
Publication number | Publication date |
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JP2006197536A (ja) | 2006-07-27 |
JP4703238B2 (ja) | 2011-06-15 |
CN101077031A (zh) | 2007-11-21 |
CN101077031B (zh) | 2012-02-01 |
US8073446B2 (en) | 2011-12-06 |
US20080117884A1 (en) | 2008-05-22 |
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