JPH09326805A - Wireless packet transmission equipment - Google Patents

Abstract

(57) Abstract: In a wireless communication system such as a digital cordless telephone, connection-type data communication is performed between a mobile data terminal and a fixed data terminal connected to a LAN. A fixed terminal 12b or a mobile data terminal 5b.
The base station controller 2b having received the packet from the base station controller 2b that manages the home network 10a of the mobile data terminal 5a via the telephone communication signal line 9 when the destination address of the packet is not registered. 2a inquires about the address assigned to the wireless network 10c of the moving destination, and determines the identifier in the data communication network of the moving destination. Next, the packet is encapsulated with the identifier as the destination address and then sent to the data communication network.
Further, the base station control device 2c at the movement destination, which has received the packet from the data communication network, routes the packet to the destination mobile data terminal 5a based on the destination address of the packet.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wide area wireless communication system in which a plurality of mobile wireless packet communication systems using both a circuit switching channel and a connectionless communication packet channel are connected to each other by a telephone network and a data communication network. In the wireless packet transmission device.

[0002]

2. Description of the Related Art In a connectionless data communication network represented by a conventional LAN, position identification and terminal identification are performed using an address depending on the physical structure of the network. Therefore, when the data terminal moves and connects to the destination network for data communication, it is necessary to reallocate the address according to the system of the network. However, when the address of the data terminal changes, data terminals other than the data terminal (hereinafter referred to as other terminals), routers, and gateways cannot identify the data terminal. IETF (Internet Engineer), which is a standardization organization on the Internet, is a means for solving this problem.
Working Gr in ng Task Force)
Mobile-IP, which is being standardized by online
(Internet Protocol), which is proposed as a draft standard recommendation (Internet Draft).

FIG. 13 is an explanatory view showing the concept of routing in the conventional data communication shown in the Mobile-IP standard proposal. In FIG. 13, 1a to c are agents for managing position information (which network belongs to) of moving data terminals (hereinafter referred to as mobile data terminals), 5a is a mobile data terminal, and 7 is TCP / IP.
(Transmission Control Pro
Internet for communication (Internet Protocol) communication, 10a to 10c are wireless networks, and 12a and 12b are fixed data terminals (hereinafter referred to as fixed data terminals).

Next, a routing operation in the conventional data communication shown in FIG. 13 will be described. The Mobile
In the IP standard proposal, each mobile data terminal 5a belongs to a home wireless network (hereinafter referred to as a home network) 10a, and a home address which is an address in the home network 10a and a destination wireless network (hereinafter referred to as a visitor network) 10c. It has two addresses, the visitor address which is the address in. When the mobile data terminal 5a moves and belongs to a visitor network, the visitor network 1
The wireless packet transmission device 0c (not shown) of the mobile data terminal 5a required for routing to the agent 1a of the home network 10a (visitor address, in this example, the address of the base station controller 1).
0c) is notified. The agent 1a of the home network 10a stores the location information 10c of the mobile data terminal 5a received from the wireless packet transmission device 10c.

Next, when a data packet is transmitted from another terminal (the other mobile data terminal 5 or the other fixed data terminals 12a, 12b) to the mobile data terminal 5a, normally, the other terminal is the mobile data terminal. Since it does not know the movement of 5a, the data packet is temporarily transmitted to home network 10a regardless of whether data terminal 5a is present in home network 10a. When a data packet addressed to the mobile terminal 5a is sent from the other terminal to the home network 10a, the agent 1a on the home network 10a uses the stored location information 10c of the mobile data terminal 5a to The data packet is routed (conveyed) to the visitor network 10c. Visitor network 10c
The data packet routed to the mobile network is carried by the agent 1c on the visitor network 10c to the mobile data terminal 5a located in the visitor network 10c.

As described above, in the conventional data communication, the mobile data terminal 5a has two addresses, the address of the home network 10a and the address of the visitor network 10c, and the agent 1a of the home network 10a and the agent 1 of the visitor network 10c.
The c manages the position information of the mobile data terminal 5a and carries the data packet, thereby realizing packet routing capable of coping with the change in address identification due to the movement of the mobile data terminal 5a.

[0007]

In the conventional wireless packet transmission apparatus configured as described above, when data communication by TCP / IP is applied to mobile communication, position information of the mobile data terminal and data by TCP / IP are used. Since the IP address used for the transfer of the data is transmitted using the same data communication network together with the data packet, there is a problem that the transfer of the information is delayed due to the increase of the traffic of the user data.

Further, in the conventional wireless packet transmission device,
When routing data packets, devices such as routers are usually targeted at fixed data terminals. For mobile data terminals, the movement destination is monitored and grasped before the movement data from other terminals. A static setting has been performed in which a human reconfigures the protocol of the router so that the data packet addressed to the terminal is conveyed to the mobile data terminal. However, in order to support the information transfer automatically even when the mobile data terminal moves freely, it is necessary to perform this routing automatically. In order to realize this automatic routing, the data communication network is required. There is a problem that the information transfer protocol must be implemented in all the devices such as the routers that compose the above.

Further, the conventional wireless packet transmission device transfers the position information of the mobile data terminal and the IP address information between at least one wireless communication system via the telephone communication network to transfer the data packet. Since data transfer is performed using a data communication network, transfer means for transferring the position information and IP address information of the mobile data terminal by the telephone communication network and transfer of the position information and address information of the mobile data terminal by the data communication network are used. There is a problem that it is necessary to have a double transfer means with the transfer means to perform.

Further, the conventional wireless packet transmission device has a problem that a packet cannot be received to a mobile data terminal that does not use a packet channel (that is, is not performing data communication due to, for example, waiting for data). .

In addition, the conventional wireless packet transmission apparatus does not have to perform the position registration operation again after the mobile unit moves, so that the position registration for telephone communication is performed even when the packet channel is used (that is, during data communication). There was a problem in that it had to perform an action.

The present invention has been made in order to solve such a problem, and is not affected by user data, and automatic routing is possible without mounting an information transfer protocol on all routers and other devices. Wireless packet transmission that realizes the following, and that does not need to have a double transfer means at the time of transferring position information or IP address, and also realizes packet reception to a mobile data terminal not using a packet channel The purpose is to provide a device.

[0013]

A wireless packet transmission apparatus according to a first aspect of the present invention has a communication channel that uses a control channel for circuit switching, a communication channel for circuit switching, and a packet channel for connectionless data communication. At least one base station that manages a wireless zone, or at least one mobile station that communicates with this base station via a wireless channel configured by at least one of the communication channels, or this mobile station And a base station to form a wireless communication system by being provided in each service area including at least one wireless zone, and via a wide area wireless communication system including at least one wireless communication system, or Directly and directly with a partner device provided in different wireless communication systems and having the same or almost the same configuration. A communication channel connected by a data communication network and a telephone communication network, in which at least one of the base stations is integrated and managed, and a control channel for circuit switching, a communication channel for circuit switching, and a packet channel for connectionless data communication are used in combination. And a mobile device using the circuit channel for communication, and a mobile device having a first identifier such as a terminal number recognized in a telephone communication network and using the packet channel for connectionless data communication. And has a second identifier such as an IP address recognized in a data communication network, and stores the correspondence between the first identifier and the packet channel number based on the location registration request by the mobile device at the destination, and The location information of the mobile device and the second identifier corresponding to the wireless communication system of the moving destination are provided to the partner device of the moving source through the telephone communication network. There are base station control device for transferring those wherein either.

A radio packet transmission apparatus according to a second aspect of the present invention is a mobile data terminal of a transmission source that transmits a data packet, a base station of a transmission source that manages the mobile data terminal of the transmission source, and this transmission. A transmission source base station control device that integrally manages an original base station, a transmission destination mobile data terminal, a transmission destination base station that manages this transmission destination mobile data terminal, and this transmission destination base station A destination base station control device to manage, and a wireless network (hereinafter referred to as a home network) that is a home of the destination mobile data terminal
A home base station that manages the home base station, and a home base station control device that integrally manages the home base station and manages position information of the transmission destination wireless network, and the transmission destination base station control device that is a movement destination. Each time the mobile data terminal of the transmission destination moves, it transmits a first identifier such as location registration information of the mobile data terminal of the transmission destination and a second identifier such as an IP address to the home base station control device. , The home base station control device stores the first identifier and the second identifier, and the base station control device of the transmission source transmits the data packet from the mobile data terminal of the transmission source every time a transmission destination is received. If it does not own the IP address of the destination mobile data terminal, the correspondence table between the first identifier and the home base station controller is searched using the first identifier such as the terminal number of the mobile data terminal of the transmission destination as a search key, and Indexing the beam base station controller, it is intended to obtain an identifier such as the IP address of the destination from the home base station controller.

The wireless packet transmission apparatus according to the third aspect of the invention comprises a routing means such as a router for routing the data packet to the destination based on the identifier such as the IP address, and the base station controller of the transmission source Each time a data packet transmission is received from the source mobile data terminal, the destination IP obtained from the home base station controller
The routing means routes the data packet to a destination based on an identifier such as an address.

Further, in the radio packet transmission apparatus according to the fourth aspect of the present invention, the base station control device of the transmission source transmits the first data packet from the mobile data terminal of the transmission source to the home base station control device. The address is acquired from the center and stored in the storage means, and each time the transmission of the next data packet is received from the mobile data terminal of the transmission source, the address of the home base station control device is taken out from the storage means, and the home base station is fetched. The identifier such as the IP address of the transmission destination is obtained from the control device.

Further, in the wireless packet transmission device according to the fifth aspect of the invention, when the mobile data terminal of the transmission destination uses the packet channel, the base station control device of the transmission destination which has received the data packet by the data communication network is If the packet channel number corresponding to the destination address of the packet is not managed, the packet channel information is read from the storage means of its own station and the incoming call is notified to the destination mobile data terminal using the circuit switching channel. Is.

Further, in the wireless packet transmission device according to the fifth aspect of the invention, the home base station control device sends the position information to the mobile data terminal each time the mobile data terminal that has moved to the packet channel moves to a different wireless network area. The contents of the storage means are obtained by changing the contents of the storage means.

[0019]

BEST MODE FOR CARRYING OUT THE INVENTION

Embodiment 1 FIG. 1 is a system configuration diagram showing an embodiment of a mobile data communication system including a wireless packet transmission device according to the present invention. In FIG. 1, 1 is position information of a mobile data terminal (which network Belongs to)
An agent that manages a base station, 2 is a base station controller that integrally manages base stations, 3 is a router that connects LANs of different systems, 4 is a base station that manages the wireless network 10,
5 is a mobile data terminal that moves between wireless networks, 6
Is a location register which is managed by the base station controller 2 and stores the location information of the mobile data terminal, and 7 is a TC
Internet for data communication by P / IP, 8 is LAN (Local Area Network), 9
Is a telephone communication network, 10 is a wireless network to which the mobile data terminal 5 is connected at the destination, and 12 is a fixed data terminal.

FIG. 2 shows an embodiment of the position information transfer and the IP address information transfer via the signal line for telephone communication when the mobile data terminal shown in FIG. 1 registers the position in the destination wireless network. FIG. 3 is a sequence diagram showing a form, in which the same symbols as in FIG. 1 indicate the same or corresponding parts. Further, FIG. 3 is a flowchart showing an operation flow of the movement-destination base station control device when the sequence shown in FIG. 2 is executed.

Next, the operation of this embodiment will be described with reference to FIGS. 1, 2 and 3. When the mobile data terminal 5a performs data communication by TCP / IP in the destination wireless network 10c, the mobile data terminal 5a first acquires a packet channel for data communication, and then the base station in the wireless network 10c. A data link is established between the control device 2c and the mobile data terminal 5a (step S100).

The detailed operation of establishing the data link will be described with reference to FIG. First, in order to carry data in a wireless section between the mobile data terminal 5a existing in the visitor network 10c and the base station control device 2c which manages the visitor network 10c, the HDLC is used.
(High Level Data Link Con
A data link is established by the control procedure procedure. In this case, first, the mobile data terminal 5
SAB of HDLC procedure from a to the base station controller 2c
ME (Set Asynchronous Balan
ceMode Extension) is transmitted. When the base station 2c accepts the SABME, the UA (UnnomeredAc) is sent to notify that the SABME has been accepted.
knowledge) is returned to the mobile data terminal 5a.

When the mobile data terminal 5a receives the UA, it receives an RR (Receive) indicating that the UA has been confirmed.
ve Ready) is returned. When the base station controller 2c receives the RR from the mobile data terminal 5a, the R
RR indicating that R has been confirmed is returned to the mobile data terminal 5a. As a result, a data link between the mobile data terminal 5a and the base station controller 2c is established. The above is the description of the HDLC procedure for establishing a data link.

Next, the mobile data terminal 5a makes a location registration request on the data link, and the base station controller 2c which has received the location registration request (step S101) determines the terminal number of the mobile data terminal 5a. And the packet channel number are registered in the location register 6c of the own station (step S102). In addition, the base station control device 2c does not use the data communication network such as the Internet 7 or the LAN 8 for the base station control device 2a of the home network 10a of the mobile data terminal 5a, but a signal for telephone communication. The position information is transferred using the line 9 (step S103). This position information is registered in the location register 6a by the base station controller 2a.

Next, TCP on the data link
Before performing TCP / IP data communication, the TCP / I
An IP address required for data communication by P is assigned to the mobile data terminal 5a. In this case, the base station control device 2c relays the message communication regarding the IP address allocation between the mobile data terminal 5a and the IP address allocation server 11 (step S104).

Details of relaying the message communication will be described with reference to FIG. First, the base station controller 2c receives the Disc address in order to obtain the IP address of the mobile data terminal 5a necessary for data communication by TCP / IP.
The broadcast is sent to all IP address allocation servers to search for an IP address allocation server having the IP address of the mobile data terminal 5a.

Of the IP address allocation servers that have received this Discover, only the IP address allocation server having the IP address of the mobile data terminal 5a is Off.
er is returned to the base station controller 2c as a response signal.
Next, the base station 2c sends an IP having the IP address.
The Request shown in FIG.
Send t to request an IP address. When the IP address allocation server 11 receives this Request, it returns the Ack shown in FIG. 2 as a response signal to report the IP address of the mobile data terminal 5a to the base station controller 2c.

When the base station controller 2c receives the IP address, the I (Information) of the HDLC procedure is received.
n) is used to convey this IP address to the mobile data terminal 5a. When the mobile data terminal 5a receives this IP address, it returns an RR indicating that the IP address has been normally received to the base station controller 2c. The mobile data terminal 5a uses this IP
The address is assigned as the address of the own device.

Further, the base station controller 2c registers the IP address transmitted to the mobile data terminal 5a in the location register 6c of its own station (step S104) and informs the base station controller 2a which manages the home network 10a. Then, the assigned IP address is transferred via the signal line 9 for telephone communication as in the transfer of the location registration information (step S105). Although not shown, this IP address is registered in the location register 6a by the base station controller 2a. After the above-mentioned IP address allocation processing is executed, TCP / IP data communication is performed between the mobile data terminal 5a and another terminal.

According to this embodiment, since the location registration information and the IP address are transferred using the signal line for telephone communication different from the data communication network, the user data is transferred in the location registration information and the IP address. As compared with a case where only the data communication network is used together with the data transfer, the effect of increasing the traffic of the user data does not occur and the delay of the information transfer can be reduced.

Further, according to this embodiment, each time the mobile data terminal moves, the home base station controller registers the position information of the movement destination, and when the data packet is transmitted from the transmission source, the transmission source Since the base station controller acquires the destination IP address from the home base station controller of the destination mobile data terminal and automatically routes the data packet, all the routers and other devices that compose the data communication network. The effect that there is no need to newly install a protocol for information transfer.

Embodiment 2 FIG. 4 is a sequence diagram showing another embodiment of the radio packet transmission apparatus according to the present invention, in the case where the mobile data terminal performs data communication in the destination radio network, It shows an operation sequence of position information transfer and IP address information transfer performed between the mobile data terminal and the base station control device of the movement destination via a signal line for telephone communication. Also, FIG.
Is also used in this embodiment. Further, FIG. 5 is a flowchart showing an operation flow of the transmission source base station control device when the sequence shown in FIG. 4 is executed.

Next, the operation of this embodiment will be described with reference to FIGS. 1, 4 and 5. First, the mobile data terminal 5a
Makes a location registration request in the visitor network 10c, the mobile data terminal 5a establishes a packet channel data link to the base station controller 2c that controls the base station 4c in the visitor network 10c. A location registration request data packet is transmitted on the data link.

When the base station controller 2c receives the location registration request data packet from the mobile data terminal 5a (step S106), it determines whether this data packet is a location registration request or data transmission addressed to the mobile data terminal 5a. In step S107, in the case of the location registration request, as in the case of the first embodiment, via the signal line 9 for telephone communication to the base station control device 2a that manages the home network 10a of the mobile data terminal 5b. , The location registration information, which is a correspondence table of the terminal number of the mobile data terminal 5a and the address 2c of the self apparatus, which means that the base station controller 2c, which is the self apparatus, manages the mobile data terminal 5a. It is transferred as a location registration request (step S108).

Further, on the data link, the base station control device 2c sends the IP address information assigned to the mobile data terminal 5a via the telephone communication network 9 in the same manner as the location registration request. 5a to the base station controller 2a that manages the home network 10a (step S109). The location registration information and the IP address are registered in the location register 6a by the base station controller 2a (not shown).

Next, as described above, after the location registration information and the IP address of the mobile data terminal 5a are registered in the base station control device 2a, another terminal (fixed data terminal 12b or mobile data terminal 5b) transmits the mobile data. T for terminal 5a
When performing data communication by CP / IP, the mobile data terminal 5b establishes a packet channel data link with the base station control device 2b controlling the base station 4b, and then the base station control device 2b. To the data link on the data link.

When the base station controller 2b receives this data packet from the other mobile data terminal 5b (step S106), it determines whether this data packet is a location registration request or transmission data addressed to the mobile data terminal 5a. (Step S107), if it is transmission data, the base station control device 2b sends the transmission destination (in this example, the mobile data terminal 5).
It is determined whether or not the IP address information of a) is owned (step S110). If the IP address information of the mobile data terminal 5a that is the transmission destination is not owned, the terminal number of the mobile data terminal 5a is determined. As a search key, a correspondence table (not shown) between terminal numbers and home network base station addresses collectively managed by a center (not shown)
Home network 10 by searching for
After determining the base station control device 2a of a, the visitor network 1 in which the mobile data terminal 5a exists via the signal line 9 for telephone communication from the base station control device 2a.
0c IP address information is acquired (step S11).
1).

Next, although not shown, the base station controller 2b
Is the data communication network 9 based on the obtained IP address information.
The data packet is routed (transmitted) to the mobile data terminal 5a via the base station control device 2c that manages the visitor network 10c (step S112).

Further, in the judgment of the presence or absence of the IP address information of the transmission destination (step S110), if the base station controller 2b already has the IP address information of the transmission destination, it is not necessary to obtain the IP address. Instead, the data packet is directly routed (step S11).
2).

According to this embodiment, each time the mobile data terminal moves, the home base station controller registers the location registration information of the destination and the IP address of the destination, and the source sends a data packet. In this case, the source base station controller acquires the destination IP address from the home base station controller of the destination mobile data terminal and automatically routes the data packet. The effect that there is no need to newly install a protocol for information transfer in the device such as the router.

Embodiment 3 FIG. 6 is a system configuration diagram showing another embodiment of a mobile data communication system including a wireless packet transmission device according to the present invention, and at the same time shows a routing operation. 6, the same reference numerals as those in FIG. 1 indicate the same or corresponding parts. FIG. 1 is also used in this embodiment.

FIG. 7 is a sequence diagram showing the operation of routing data packets to the mobile data terminal shown in FIG. 6, and the location registration information obtained by transfer between base stations via a signal line for telephone communication. And a sequence for executing data packet routing to the mobile data terminal based on the IP address. FIG. 8 is a flowchart showing an operation flow of the base station control device 2b that manages the home network of the transmission source when executing the sequence shown in FIG.

Next, the operation of this embodiment will be described with reference to FIGS.
This will be described with reference to FIG. In the present embodiment, it is premised that the home base station control device 2a has previously stored information such as the IP address of the mobile data terminal 5a in the location register 6a.

The base station controller 2b is connected to the mobile data terminal 5
b from the fixed data terminal 12b to the mobile data terminal 5a existing in the visitor network 10c.
When a data packet by IP is received (step S1
13) If the home network information of the mobile data terminal 5a is stored in the location register 6b of the own station, the home network information of the mobile data terminal 5a is read from the location register 6b of the own station (step S114). ).

In step S113, if the base station control device 2b does not store the home network information of the mobile data terminal 5a in the location register 6b of its own station, as in the second embodiment, the center ( The home network information of the mobile data terminal 5a is taken out (not shown), and the location register 6b of the own station is taken out.
The home network information of the mobile data terminal 5a is stored in the.

Next, the base station controller 2b, based on the information of the home network of the mobile data terminal 5a,
After determining the base station control device 2a that manages the home network 10a, the base station control device 2a
To the mobile data terminal 5a to which the visitor network 10c is assigned (step S115).

In response to a request from the source base station controller 2b, the home base station controller 2a reads information such as the IP address of the mobile data terminal 5a from the location register, and the source base station controller 2a. 2b is returned as a response.

Next, when the source base station controller 2b receives the information such as the destination IP address from the home base station controller 2a, it encapsulates the data packet in the information such as the IP address. Then, the route is routed to the base station controller 2c that manages the visitor network 10c (step S116). When the base station controller 2c receives the routed data packet, it transmits the data packet to the mobile data terminal 5a on the data link already established with the mobile data terminal 5a.

According to this embodiment, each time the mobile data terminal moves, the home base station controller registers the position information of the movement destination, and when transmitting the data packet from the transmission source, the base station of the transmission source. The controller obtains the home base station controller from the identifier identified by the destination telephone communication network, obtains the destination IP address from the home base station controller, and automatically routes the data packet. Therefore, there is an effect that it is not necessary to newly install an information transfer protocol in all devices such as routers that configure the data communication network.

Further, according to this embodiment, the base station control device of the transmission source receives the address of the home base station control device from the center when receiving the transmission of the first data packet from the mobile data terminal of the transmission source. Since the address of the home base station control device is acquired from the mobile data terminal of the transmission source and received from the mobile data terminal of the transmission source next time, the address of the home base station control device is fetched from the storage means. Play.

Embodiment 4 FIG. FIG. 9 is a sequence diagram showing another embodiment of the mobile data communication system according to the present invention, which is based on the position information and the IP address information obtained by the transfer via the signal line for telephone communication between the base stations. 3 shows a sequence for carrying a routed packet to the mobile data terminal. FIG. 1 is also used in this embodiment. 6 is also used in this embodiment. FIG. 10 is a flowchart showing the operation of the base station controller when executing the sequence shown in FIG.

Next, the operation of this embodiment will be described with reference to FIGS. 1, 6, 9 and 10. Here, the base station control device 2c that manages the visitor network 10c
However, it is assumed that the location register 6c of the local station stores in advance information about the packet channel currently used by the mobile data terminal 5a (for example, conversion information from a physical link to a logical link).

Similar to the third embodiment, the base station controller 2c which manages the wireless network 10c for carrying the data packet (IP packet) routed to the mobile data terminal 5a existing in the visitor network 10c. Receives a data packet (IP packet) addressed to the mobile data terminal 5a (step S
117), information on the packet channel currently being used (for example, conversion information from the physical link to the logical link) is fetched from the location register 6c of the own station (step S116).

Next, it is judged whether or not the packet channel for which the data link with the mobile data terminal 5a has already been established exists (step S119), and if it does not exist, the data is transmitted by the control channel for circuit switching. Is notified to the mobile data terminal 5a (step S120), a data link is newly established with the mobile data terminal 5a (step S121), and the data packet (IP packet) is transmitted on the data link. Carry out.

According to this embodiment, since the incoming call is notified to the mobile data terminal using the circuit switching control channel, the incoming call of the packet can be made to the mobile data terminal not using the packet channel. Has the effect.

Embodiment 5 FIG. 11 is a sequence diagram showing another embodiment of the wireless packet transmission device according to the present invention, in which the mobile data terminal 5a and the mobile data terminal 5a move when the mobile data terminal moves the area during the packet channel acquisition in a certain wireless network. An operation sequence between the original base station 4a or the movement-destination base station 4d and the movement-source base station control device 2a is shown.

FIG. 1 is also used in this embodiment. Further, FIG. 12 is a flowchart showing the operation of the base station controller 2a when executing the sequence shown in FIG.

Next, the operation of this embodiment will be described with reference to FIGS.
1 and FIG. 12 will be described. Between the mobile data terminal 5a and the base station controller 2a which captures a packet channel for performing data communication by TCP / IP in the wireless network 10a and controls the base station 4a that manages the wireless network 10a. From the area of the base station 4a to the base station 4d while the data link is being established.
When the base station controller 2a receives the data packet from the mobile data terminal 5a (step S123), it determines whether or not the packet channel number has been changed (step S124) and is changed. If not, the data link with the mobile data terminal 5a is maintained as it is.

Further, in judging whether or not the packet channel number is changed (step S124),
When the packet channel number is changed, the changed packet channel number is registered again in the location register 6a of the own station while maintaining the data link with the mobile data terminal 5a.

According to this embodiment, even if the mobile data terminal 5a moves to a different area, the data link between the base station controller 2a and the mobile data terminal 5a is maintained only by changing the packet channel number. Therefore, it is possible to reduce the amount of location registration processing for telephone communication.

[0061]

According to the first aspect of the present invention, since the transfer of the position information and address information of the mobile device is transferred using the telephone communication signal line, the transfer of user data is carried out at the same time as the position registration and the transfer of the IP address. As compared with the case of using only the communication network, the effect of increasing the traffic of user data does not occur, and the effect that the delay of information transfer can be reduced is exerted.

According to the second aspect of the invention, since the telephone communication network transfers the position information and IP address information of the mobile data terminal, the data communication network needs to have a transfer means for the position information and IP address information of the mobile data terminal. There is no effect.

According to the third aspect of the invention, each time the mobile data terminal moves, the home base station controller registers the position information of the movement destination, and when transmitting the data packet from the transmission source, the base station of the transmission source. The controller obtains the home base station controller from the identifier identified by the destination telephone communication network, obtains the destination IP address from the home base station controller, and automatically routes the data packet. Therefore, there is an effect that it is not necessary to newly install an information transfer protocol in all devices such as routers that configure the data communication network.

According to the fourth invention, the base station control device of the transmission source acquires the address of the home base station control device from the center when receiving the transmission of the first data packet from the mobile data terminal of the transmission source. The address of the home base station controller is fetched from the storage means each time the transmission of the next data packet is received from the mobile data terminal of the transmission source, so that the delay is reduced.

According to the fifth aspect of the invention, since the incoming call is notified to the mobile data terminal using the circuit switching control channel, the incoming call of the packet can be made even to the mobile data terminal not using the packet channel. Has the effect.

According to the sixth invention, the mobile data terminal 5a
Even if the mobile data terminal 5 moves to a different area, only by changing the packet channel number,
Since the data link with a is maintained, the amount of location registration processing for telephone communication can be reduced.

[Brief description of drawings]

FIG. 1 is a system configuration diagram showing an embodiment of a mobile data communication system including a wireless packet transmission device according to the present invention.

FIG. 2 shows an embodiment of position information transfer and IP address information transfer via a signal line for telephone communication when the mobile data terminal shown in FIG. 1 performs position registration in a destination wireless network. It is a sequence diagram.

FIG. 3 is a flowchart showing an operation flow of a movement-destination base station control device when the sequence shown in FIG. 2 is executed.

FIG. 4 is a sequence diagram showing another embodiment of the wireless packet transmission device according to the present invention.

FIG. 5 is a flowchart showing an operation flow of a base station control device of a transmission source when executing the sequence shown in FIG.

FIG. 6 is a system configuration diagram showing another embodiment of a mobile data communication system including a wireless packet transmission device according to the present invention.

7 is a sequence diagram showing an operation of routing a data packet to the mobile data terminal shown in FIG.

8 is a flowchart showing an operation flow of a base station controller which manages a home network of a transmission source when the sequence shown in FIG. 7 is executed.

FIG. 9 is a sequence diagram showing another embodiment of the mobile data communication system according to the present invention.

FIG. 10 is a flowchart showing an operation of the base station controller when executing the sequence shown in FIG.

FIG. 11 is a sequence diagram showing another embodiment of the wireless packet transmission device according to the present invention.

FIG. 12 is a flowchart showing an operation of the base station controller 2a when executing the sequence shown in FIG.

FIG. 13 is an explanatory diagram showing the concept of routing in conventional data communication shown in the Mobile-IP standard proposal.

[Explanation of symbols]

 1 Agent 2 Base Station Control Measures 3 Router 4 Base Station 5 Mobile Data Terminal 6 Location Register 7 Internet 8 LAN 9 Telephone Communication Network 10 Wireless Network 11 IP Address Allocation Server 12 Fixed Data Terminal

Claims (6)

[Claims] 1. At least one base station for managing a wireless network, which has a communication channel in which a circuit switching control channel and a circuit switching communication channel and a packet channel for connectionless data communication are used in combination, and this base station. And at least one mobile device that communicates with each other via a wireless channel configured with at least one communication channel, and the mobile device and the base station, and at least one wireless network are provided for each service area. By configuring the wireless communication system, the wireless communication system is arranged in different wireless communication systems via the wide area wireless communication system including at least one wireless communication system or directly, and the same or nearly the same structure is provided. Connected to each other through a data communication network and a telephone communication network, and at least one Of the mobile station that integrally manages the base stations and has a communication channel used in combination with a control channel for circuit switching and a communication channel for circuit switching and a packet channel for connectionless data communication, and uses the communication channel for circuit switching. A second identifier, such as an IP address, which has a first identifier such as a terminal number recognized by a telephone communication network together with a mobile device, and which is recognized by a data communication network together with a mobile device which uses the packet channel for connectionless data communication. And stores the correspondence between the first identifier and the packet channel number based on the location registration request by the mobile device at the destination, and supports the location information of the mobile device and the wireless communication system at the destination. And a base station control device for transferring the second identifier to the destination device of the movement source using the telephone communication network. Wireless packet transmission apparatus according to claim. 2. A mobile data terminal of a transmission source that transmits a data packet, a base station of a transmission source that manages the mobile data terminal of the transmission source, and a base of a transmission source that integrally manages the base station of the transmission source. A station controller, a destination mobile data terminal, a destination base station that manages the destination mobile data terminal, a destination base station controller that integrally manages the destination base station, and A home base station that manages a wireless network (hereinafter referred to as a home network) that is a home of a mobile data terminal of a transmission destination, and a home base station that integrally manages the home base station and manages position information of the transmission destination wireless network. The base station control device of the transmission destination, which is a destination, includes a control device and a base station control device of the transmission destination mobile data terminal each time the mobile data terminal of the transmission destination moves. 1 identifier and second such as IP address
Is transmitted to the home base station controller, the home base station controller stores the first identifier and the second identifier, and the base station controller of the transmission source moves the transmission source of the transmission source. Whenever a data packet is received from a data terminal, if the destination IP address is not owned, the first identifier such as the terminal number of the destination mobile data terminal is used as a search key to control the first identifier and home base station control. 2. The wireless packet transmission device according to claim 1, wherein the correspondence table with the device is searched to find the home base station control device, and an identifier such as an IP address of a transmission destination is obtained from the home base station control device. . 3. A base station controller of a transmission source is provided with a routing means such as a router for routing a data packet to a transmission destination based on an identifier such as an IP address.
Each time the data packet transmission is received from the source mobile data terminal, the routing means routes the data packet to the destination based on the identifier such as the IP address of the destination obtained from the home base station controller. The wireless packet transmission device according to claim 2, characterized in that 4. The source base station controller acquires the address of the home base station controller from the center and stores it in the storage means when receiving the first data packet transmission from the source mobile data terminal. Each time the transmission of the next or subsequent data packet is received from the mobile data terminal of the transmission source, the address of the home base station control device is retrieved from the storage means, and the identifier such as the IP address of the transmission destination is extracted from the home base station control device. The wireless packet transmission device according to claim 2, wherein the wireless packet transmission device is obtained. 5. When the destination mobile data terminal uses a packet channel, the destination base station controller which has received the data packet by the data communication network uses the packet channel number corresponding to the destination address of the packet. 5. If the mobile data terminal is not managed, the packet channel information is read from the storage means of its own station and the incoming call is notified to the destination mobile data terminal using the circuit switched channel. The packet transmission device according to 1. 6. The home base station control device obtains this position information from the mobile data terminal and changes the contents of the storage means each time the mobile data terminal that has moved to the packet channel moves to a different area of the wireless network. The packet transmission device according to any one of claims 1 to 5.