JP2003153332A - Mobile terminal for communication, communication system, and data transfer device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suppress power consumption by decreasing the quantity of control information received within a network so as to inform its opposite terminal or the like of the position of a mobile terminal, in a communication system using, for example, the internet. SOLUTION: A mobile terminal for communication is equipped with a terminal position information notice means which informs the data transfer devices corresponding severally to its opposite terminal, the area of the home link of itself, the area where it exists now, and the area where it existed just before en block of the plural sets of positional information of termini where each set consists of the positional information of each of plural areas for specifying each of the areas, to which it is slated to shift next and an existence time showing the slated period when it exists in each of the plural areas.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mobile communication system, and more specifically, in a mobile communication system using the Internet as a network, for example, an area where a mobile terminal will move in the future and an expected period in which the mobile terminal will stay. By notifying a plurality of sets of and, even if the mobile terminal moves between areas, a communication mobile terminal capable of correctly transmitting communication data sent to the mobile terminal to the mobile terminal, a communication system, and The present invention relates to a data transfer device.

[0002]

2. Description of the Related Art FIG. 28 shows a conventional example of a data communication system supporting mobile terminals. In the figure, the communication system is a link corresponding to the network 100 and area A, and includes a home link 101 of a mobile terminal, an area B,
Router 10 connected to foreign link 102, mobile terminal 103, and home link 101 respectively corresponding to C
4. Router 10 connected to foreign link 102
5, partner terminals 106 and 109, and partner terminals 106 and 1
It is configured by routers 107 and 108 connected to 09.

In FIG. 28, it is assumed that a method for supporting a mobile terminal is used by using Mobile IPv6 which is under study by IETF (Internet Engineering Task Force). This mobile IP
v6 is an internet draft being considered as internet protocol version 6. A procedure for supporting the movement of terminals by this method will be described.

In FIG. 28, the mobile terminal 103 is in area B.
When the mobile terminal 103 moves from C to C, the mobile terminal 103 acquires the address (care of address 1) of the area C, and notifies the communication terminal 106 of the address as a binding update.

The mobile terminal 103 requests the transfer to the area C of the packet which has arrived at the router B for the area B after moving to the area C. Therefore, as a binding update, the address of the area C (care of The address 1) is notified to the router B.

In the system of FIG. 28, a new partner terminal 1
When communication from 09 to mobile terminal 103 is started, partner terminal 109 transmits a packet to router A for home link 101 of mobile terminal 103 because the current address of mobile terminal 103 is unknown, and the packet moves from router A. The mobile terminal 103 notifies the router A of the address of area C (care of address 1) because the terminal 103 has a mechanism to be transferred to the area where the terminal 103 is currently located.

,, respectively indicate responses informing that the partner terminal 106, the router B, and the router A have received the address notification when the mobile terminal 103 requests an acknowledgment for the transmission of the binding update.

FIG. 29 is an explanatory diagram of an example of data transmission / reception within the network in FIG. In the figure, the mobile terminal receives a router advertisement indicating, for example, the area ID from routers B and C for areas B and C, and moves from area B to C as described in FIG. For example, the address of the area C notified from the router C, for example, ID is acquired as the care of address 1. ,, respectively, the address of area C is the destination terminal 106, routers C and B,
And to the router A to which the home link 101 is connected, and the acknowledgments are respectively received at.

In FIG. 29, for example, the access point B is the router B and the foreign link 1 in FIG.
It corresponds to the connection point with 02. Also, in FIG. 29, area D,
Routers D, E, corresponding to E, ..., N respectively
..., N, etc. are assumed to exist.

Before moving from area C to area D,
As shown by ', the router advertisement is received from the router C in the area C in which it is located and the router D in the area D that is near, and after moving to the area D, the area D is moved.
The address of the other terminal 10
6. Send to routers D, C, and A, and receive acknowledgments at'- 'respectively.

FIG. 30 shows the configuration of a second conventional example of a mobile communication system. This conventional example is an example of a communication system in which terminals are simultaneously called in order to reduce the number of times of transmitting and receiving a control signal for knowing the position of a mobile terminal. In the figure, the system is a radio base station for creating a radio zone of a certain size, a mobile communication control station for executing a radio line control function and a mobile communication switching function, and a home memory station for managing subscriber information of mobile terminals. , And a mobile terminal.

The mobile terminal receives the ID for position registration transmitted from the radio base station. The value of this ID is the same for a plurality of wireless base stations within the location registration area. That is, the wireless base station has the same ID, and the wireless base station and the wireless base station also have the same ID value.

When the mobile terminal detects that the value of the ID for location registration has changed at the time of moving to a different location registration area, it notifies the wireless base station of the change of the location registration area, and the result of the change is the mobile communication. It is stored in the database of the home memory station via the location registration control unit of the control station.

When an incoming request is made to the mobile terminal, the location registration area stored in the home memory station is searched, and the paging signal is transmitted from the radio base station in the corresponding location registration area. The mobile terminal makes a response to the simultaneous call to the existing wireless base station, whereby the wireless base station is specified and wireless connection is established. With this configuration, the mobile terminal does not need to notify the position information each time the wireless zone changes, and the number of times of transmitting / receiving control signals can be reduced.

FIG. 31 is an explanatory diagram of the relationship between the size of the position registration area and the amount of control information in FIG. In the figure, when the location registration area becomes large, the amount of information for connection control increases, and conversely when the location registration area becomes small,
Since it is necessary to frequently notify the change of location registration, the amount of control information increases.

As a conventional technique for solving such a problem, there is the following document. Reference) Patent No. 2987780
No. "Location registration control method in mobile communication" FIG. 32 is an explanatory diagram of a hierarchical structure of a location registration area in this document. In the figure, position registration area patterns of three layers are formed, the lowest area pattern is composed of four areas of position registration areas 1-1 to 1-4, and the area pattern above it is the position registration area. 2-1 and 2-2
And the uppermost area pattern is composed of only the position registration area 3-1.

An optimum location registration area pattern is assigned to each mobile terminal according to the size of the moving range of the mobile terminal. That is, the lowest area pattern is assigned to a mobile terminal having a narrow moving range, and the highest area pattern is assigned to a mobile terminal having a very wide moving range, thereby reducing the amount of control information. .

[0018]

In the conventional example described with reference to FIG. 28, first, both the mobile terminal communicating with the partner terminal and the mobile terminal waiting for communication communicate from another terminal different from the partner terminal. Area B to prepare for
When moving from area C to area C, end point position information for the router of the home link, for example, ID of area C after movement
However, there is a problem in that the binding must be updated and transmitted every time the area is moved. For this reason, there is a problem that the amount of control information transmitted in the network increases, and power is consumed for the transmission in the waiting terminal.

Secondly, in order to prevent the loss of the packet transmitted to the previous area every time the mobile terminal in communication and the mobile terminal in standby wait for the packet transfer request to be transmitted to the router in the previous area. Binding for
Had to send an update. However,
In the case of a mobile terminal moving at high speed, the mobile terminal may be moving to another area at the time of packet transfer, which complicates packet transfer control and may cause packet discarding. There was a problem.

Thirdly, the mobile terminal in the standby mode as described above consumes power each time it moves in the area to transmit the binding update to the router in the previous area, which leads to a reduction in the standby time. was there.

In the conventional example described with reference to FIG. 32, it is necessary to specify the position registration area to be registered by the mobile terminal in correspondence with the pattern of the position registration area. If it cannot be specified, the amount of control information becomes large, and a plurality of wireless zones (areas) must be collected according to the moving range, and an area pattern must be assigned to each mobile terminal.

The first object of the present invention is to solve the problem that the mobile terminal has to send a binding update to the router of the home link every time the mobile terminal moves in the area.

The second problem is that every time a mobile terminal moves in an area, a binding update for requesting packet transfer has to be transmitted to the router in the previous area, and when the mobile speed of the terminal is high. Is to solve the problem that the control of the packet transfer becomes complicated, and the third problem is to solve the problem that the power consumption of the waiting terminal in this case increases.

[0024]

FIG. 1 is a block diagram showing the principle configuration of a data transmission system according to the present invention. In the figure, the system includes a mobile terminal 1, a partner terminal 2, a network 3, a data transfer device 4 corresponding to a home link router, and a plurality of data transfer devices 5 corresponding to foreign link routers.

In FIG. 1, a mobile terminal 1 is movable between a plurality of areas, communicates with a partner terminal 2 via a network 3, and includes an end point position information notifying means 6.

The end point position information notifying means 6 indicates each position information of a plurality of areas for specifying each of the areas where the mobile terminal 1 is going to move in the future, and the planned period of stay in each of the plurality of areas. A plurality of sets of end point position information, one set of which is the survival time, is collectively notified to the outside.

In the embodiment of the invention, the end point position information notifying means 6 can notify a plurality of sets of end point position information to the partner terminal 2, and the present area or the immediately preceding area. The data transfer device corresponding to each area and the home link area of the mobile terminal, and the data transfer devices corresponding to each of a plurality of areas as future destinations can be simultaneously notified. it can.

Next, the communication system of the present invention comprises a mobile terminal 1,
Although it is basically configured by the partner terminal 2 and the network 3, it further includes a mobility control server not shown in FIG.
The mobile control server creates a rule for predicting an area in which the mobile terminal 1 moves and a period in which the mobile terminal 1 is located, and transmits the rule to the mobile terminal 1.

Then, the mobile terminal 1 checks the validity of the rule sent from the mobility control server, and when the rule is valid, position information of a plurality of areas for specifying each of the areas to be moved in the future. And the end point position information notifying means 6 for collectively notifying the outside of a plurality of sets of end point position information, each set including one and a survival time indicating a planned period of stay in each of the plurality of areas.

In the embodiment, the mobile terminal 1 may further comprise rule correction data transmitting means for transmitting the rule correction data to the mobile control server when the rule sent from the mobile control server is not valid. it can.

The end point position information notifying means 6 can also set the above-mentioned survival time on the basis of the rule sent from the mobile control server, and the rule sent from the mobile control server and the area already moved. It can also be set based on the time that the user was in the area.

The data transfer devices 4 and 5 of the present invention correspond to a plurality of areas, respectively, and a network 3 is provided between communication terminals.
It controls the transfer of communication data performed via the terminal, has basically the same configuration, and includes an end point position information acquisition unit and an end point position information storage unit.

The end point position information acquiring means is a position information of each of a plurality of areas for specifying each of the areas to be moved next from the movable communication terminal, and a planned period of staying in each of the plurality of areas. And a survival time indicating that the end point position information is collectively received, and the end point position information storage means stores the communication data sent to the mobile terminal during the life time. In order to control the transfer, the end point position information is stored in a list format.

In the embodiment, the data transfer device stores the position information currently judged to be valid based on the value of the survival time among the plurality of end position information in the list format stored in the end position information storage means. The effective end point position information storage means may be further provided.

In the embodiment, the data transfer device 4 corresponding to the area of the home link of the mobile terminal 1 uses the plurality of sets of end point position information already acquired when the mobile terminal 1 is normally connected to the network. When all are invalid, the end point position information request for requesting the position information of at least the area currently in the mobile terminal 1 and the survival time indicating the planned period of stay in that area as the end point position information Means may further be provided.

In the program used by the computer constituting the mobile terminal 1 of the present invention, position information of a plurality of areas in which the mobile terminal 1 is predicted to move and prediction periods existing in each of the plurality of areas are set. The procedure of receiving the rule shown, the procedure of verifying the validity of the rule, the location information of each area for identifying each of the areas to be moved in the future when the rule is valid, 1 with the survival time that indicates the planned period of stay in each area of
A program is used for causing a computer to execute a procedure of collectively reporting a plurality of sets of end point position information to the outside.

In the embodiment, this program can also be stored in a portable storage medium such as a flexible disk. In addition, the procedure to verify the validity of the above-mentioned rule is to measure the time spent in each area each time it passes through that area, and increment the counter when the measurement result is within the time range described in the rule. And a procedure for determining that the rule is valid when the count value of the counter reaches a predetermined value.

Further, in the program used by the computer constituting the data transfer apparatus of the present invention, position information of each of a plurality of areas for specifying each of the areas to be moved from the movable communication terminal, 1 with the survival time that indicates the planned period of stay in each of the multiple areas
To receive multiple sets of end point position information as a set, and to control the transfer of communication data sent to the mobile terminal during its lifetime, list the multiple end point position information. A program for causing a computer to execute the procedure stored in the above is used.

In the embodiment, this program can also be stored in a portable storage medium such as a flexible disk. This program also
Of the multiple end point position information stored in list format,
It is also possible to further include a procedure of storing the position information of the area currently determined to be valid based on the value of the survival time.

As described above, according to the present invention, a plurality of sets of end point position information, in which the position information of an area where the mobile terminal is to move in the future and the survival time in the area are one set, The other terminal and the data transfer device are collectively notified.

[0041]

FIG. 2 is a block diagram of a network in which the data transmission system of the present invention is realized.
This figure shows the configuration of a trunk line LAN that collects and transmits data from many local area networks (LAN) and a network system mainly composed of a wide area network (WAN) 11.
Can also be configured by the Internet.

The mobile terminal 10 in FIG.
From B to C, but when moving from one area to another area, information for identifying the area as end point position information, for example, ID
To the router A14 connected to the home link 12 in the area A. As a result, the data transmitted to the home link 12 toward the mobile terminal 10 can be transferred to the foreign link in the area where the mobile terminal 10 exists.

In FIG. 2, areas B, C, D, ...
The foreign link 13 is connected to the trunk LAN via a router 15 and an access point (connection point with a wireless link) 17, respectively. The other terminal 1
The router 9 is connected to the trunk LAN 11 via the router 16. The router A plays the role of a home agent for the home link 12 of the area A, and the router B plays the role of a home agent for the foreign link of the area B. Furthermore, although the mobile terminal 10 is assumed to be wirelessly connected to the home link 12 or the foreign link 13, the connection with the network may be a wired connection using a connector or the like.

Further, the movement control server 1 is connected to the trunk LAN 11.
8 is connected. When the mobile terminal 10 moves between areas, the movement control server 18 creates and stores a rule for predicting a state in which the end point position information is updated by the movement, and stores the rule, for example, a router. 15,
The mobile terminal 10 is notified via the access point 17, and the rules are updated, created, and deleted using the data for modifying the rules sent from the mobile terminal 10 side.

FIG. 3 is a block diagram of a configuration example of a mobile terminal. In the figure, the mobile terminal 10 includes a PC unit 21 corresponding to, for example, a personal computer main body or a processor,
And a data processing unit 25 that receives data from the access point 17 via a receiving unit 23 and a demodulating unit 24. The communication unit 22 is a PCMCIA (Personal Computer Memory Card International Association) wireless card. Sent to.

The data processing unit 25 performs processing in accordance with the communication protocol, and sends data relating to communication control to the communication control unit 2.
6 and the application data to the PC section 21. In addition, application data from the PC unit 21,
It receives data relating to communication control from the communication control unit 26, performs data processing according to the communication protocol, and sends it to the modulation unit 27. The modulator 27 modulates the data, and the transmitter 28 transmits the modulated data to the access point 17.

The communication control unit 26 includes a CPU 29 and a RAM 3
0, ROM 31, etc., and includes a receiver 23, a demodulator 24,
The modulation unit 27 and the transmission unit 28 are controlled, and the data received from the data processing unit 25 is used to perform processing such as call control. In the processing, control according to the communication protocol of each layer is executed.

Further, the communication control unit 26 stores the rule for update prediction of the end point position information of the mobile terminal sent from the mobile control server 18 of FIG. 2 in the RAM 30, for example. further,
As a feature of the present invention, the communication control unit 26 of the mobile terminal 10 is
For example, by creating a plurality of end point position information to be notified to the router 14 of the home link 12 and passing the end point position information to the data processing unit 25, the plurality of end point position information is transmitted to the router 14 via the modulator 27 and the transmitter 28. Sent to.

Further, the communication control unit 26 is used by the movement control server 1
When it is necessary to change or delete the rule created by 8, or create a new rule, the request is transmitted to the mobility control server 18 via the data processing unit 25. Further, when the end point position information is notified to the home link router 14 and other routers 15, etc., the notification is used as a binding update and the effective time (survival time) of the notification destination and the end point position information is stored in the RAM 30.

FIG. 4 is a block diagram of the router in FIG. The routers 14, 15, and 16 in FIG. 2 have basically the same configuration. A router is basically a device that transfers data between multiple networks.
Then, data is transferred between the network and n networks outside the network 1.

[0051]

[Outer 1]

In FIG. 4, n data transmitting / receiving sections 41 are provided.
Are connected to the network to the outside 2 respectively, and address the data input from the network.

[0053]

[Outside 2]

While passing to the detecting section 42, the data to which the header is added by the header adding section 44 and the data from the second switch 45 are transmitted to the network side. The address detection unit 42 extracts the end point address field of the header section of the input data, and the content of the field is the end point position information (care of address) stored in the RAM 47 in the PC section 40, that is, the binding. The CPU 46 is inquired whether or not the contents match the cache contents. Here, the care of address corresponds to the ID of the foreign link 13 which is not the home link 12 for the mobile terminal 10, and is notified from the mobile terminal as described later. The ID corresponding to the home link 12 and the care-of address of the foreign link 13 before the mobile terminal sent the binding update to transfer the communication data are called the home address.

FIG. 5 shows an example of the stored contents of the binding cache. In the figure, the normal end point position information notified from a plurality of mobile terminals, that is, the address of the area notified when each mobile terminal enters a new area, that is, the care of address and the presence in that area A lifetime and a scheduled time are stored one by one in association with the home address of each mobile terminal.

If the end point address extracted by the address detection unit 42 is, for example, the home address "AD_h1", the address detection unit 42 determines whether or not there is a matching home address in the binding cache.
Contact PU46. Since the same home address exists, the address detection unit 42 connects the first switch 43 to the header addition unit 44 side in response to the response from the CPU 46, and sends the data to the header addition unit 44.

The header adding section 44 uses data (packet)
The contents of the end point address field necessary for the transfer of
46, and the CPU 46 determines from the contents of the binding cache stored in the RAM 47 the care of address corresponding to the above-mentioned home address, here “A”.
The header addition unit 44 is notified of D1 ″.

The header adding unit 44 stores the start address of the packet header, that is, the address of the router itself in the source address field, and the end address, that is, the care of address "AD1" notified from the CPU 46 in the destination address field. The packet is transmitted to the network on the end point address side via the data transmitting / receiving unit 41.

The above-mentioned home address or care of address does not exist in the binding cache,
When the packet is to be transferred to another network, the address detection unit 42 sets the first switch 43 to the second switch.
The switch 45 is connected to the switch 45 side, and the packet is transmitted via the data transmitting / receiving unit 41 to the network to which the packet should be transmitted according to the contents of the end point address field.

FIG. 6 is an explanatory diagram of a method of selecting a network to be transmitted. The network to which the packet is to be transmitted is selected according to the upper bits of the content of the end point address field of the packet header, that is, the prefix. For example, when the prefix of the end point address is "P1", the second switch 45 executes control for transmitting data to the network.

FIG. 7 is a block diagram showing the configuration of the mobility control server 18. The movement control server 18 is a device that creates connection point change information corresponding to the above rules.
The connection point change information has a one-to-one correspondence with the end point position information sent from the mobile terminal, and the access point 17 when the mobile terminal 10 connects to the network is the area of the mobile terminal 10. The information about how the information is changed according to the movement between the two corresponds to the rule.

The movement control server 18 includes a PC section 51 corresponding to a main body of a personal computer and an LA (Peripheral Component Interconnect) PCI, for example.
The communication unit 52 corresponds to the N card.

Input data from the network connection unit with the trunk LAN 11 shown in FIG. 2 is sent to the data processing unit 54, and the data processing unit 54 processes the data in accordance with the communication protocol, and the data concerning the communication control is transferred to the communication control unit 5.
3, the application data is sent to the PC section 51. It also receives application data from the PC unit 51 and data relating to communication control from the communication control unit 53, performs processing according to the communication protocol, and outputs the processing result data to the network connection unit. The communication control unit 53 controls the data sent from the data processing unit 54 according to the communication protocol of each area.

The communication control unit 53 is a program or data sent from the network, the external storage device 6 of the PC unit 51.
The program and data sent from the data processing unit 54 from 2 are stored in the RAM 56 or written in the ROM 57. Further, the communication control unit 53 creates connection point change information corresponding to the rule by a program stored in the RAM 56 or the like, and the change information is stored in the data processing unit 54.
And the rules are transmitted to the mobile terminal 10, for example.

Further, the communication control unit 53 receives the connection point change information, when the request for correction of the connection point change information transmitted from the mobile terminal 10 or the request for deleting or newly creating a rule is input from the data processing unit 54. That is, the rule is rewritten and the rule is transmitted to the mobile terminal 10 or the router as necessary.

The processing of programs and data may be performed by the PC section 51 instead of the communication control section 53, and the PC section 51 may of course change, delete, or newly create rules. The server 18 does not have to be connected to the trunk LAN 11 as described with reference to FIG.
It can also be implemented in a router or access point.

FIG. 8 is an explanatory diagram of the wireless zone (area) on the expressway for explaining the connection point change information and the rules corresponding thereto. In the present embodiment, for simplicity, the wireless zones and the areas correspond to each other on a one-to-one basis. However, as described with reference to FIG. 30 and the like, one area corresponds to a plurality of wireless zones having the same address. Of course, it is possible.

In FIG. 8, a highway HWY runs in the east-west direction, for example, and there are many areas along the highway, that is, wireless zones 1 to 32, and an interchange is provided inside the wireless zone 1. In addition, the general road RD crosses the expressway.

It is presumed that the mobile terminal in the automobile traveling on the highway HWY moves in either direction A or direction B at a substantially constant speed depending on the congestion situation.
FIG. 9 is an explanatory diagram of the time required for this movement. For example, an automobile that has begun to travel on a highway from the wireless zone 1 having an interchange moves in the order of the wireless zone 2, the wireless zone 8, the wireless zone 19, and the wireless zone 20 according to the direction A.

In FIG. 9, the minimum time from entering the wireless zone 8 to exiting it is t21, and the maximum time is t22. This time difference depends on the speed of the car. In addition, the minimum value of the running time from entering the wireless zone 19 to leaving is t
31, the maximum value is t32, the minimum value of the traveling time from entering the wireless zone 20 to exiting is t41, and the maximum value is t.
42. Here, for the sake of simplicity, the accumulation of time differences according to traveling will not be considered.

FIG. 10 is an explanatory diagram of a rule corresponding to the connection point change information. The figure shows the contents of Rule 1, and when a car entering an interchange travels from wireless zone 2 to wireless zone 25 in accordance with direction A, the minimum time required from entering each wireless zone to passing through , And the maximum required time. According to Rule 1, it is possible to estimate the wireless zone in which the mobile terminal exists corresponding to each time.

As will be described later, the mobile terminal enters a wireless zone to which the rule can be applied, and after it is determined that the rule is established, a plurality of end point positions using the IDs of the wireless zone and the wireless zone to be traveled in the future are set. The information is notified to the router 14 corresponding to the home link 12 in FIG. 2, the partner terminal 19, the router 15 corresponding to the foreign link 13 of the wireless zone (area) that has passed through immediately before, and the like.

In addition to the above, in the present embodiment, a plurality of end points are set so that the router 15 corresponding to the foreign link 13 of the wireless zone (area) to be traveled in the future can estimate the end point address in the future. Notify location information. In this case, by using a multicast address or the like, it is possible to reduce the amount of control information transmission in the common section including the wireless section in the transmission path of the packet for notifying the end point position information.

FIG. 11 is an explanatory diagram of such a plurality of end point position information. For example, when the mobile terminal 10 enters the wireless zone 19 from the wireless zone 8 in FIG.
The end point address AD19 and the corresponding time to live t33 corresponding thereto are notified to the partner terminal 19, the router corresponding to the home link, and the router 15 corresponding to the foreign link of the wireless zone 8 that has already passed through as end point position information. Here, the survival time t33 is a predicted value of the travel time required from entering the wireless zone 19 to leaving the wireless zone 19, and the terminal 10
Predicts this time and reports it as time to live.

In addition to this, the mobile terminal 10 sets the end point address corresponding to the wireless zone which is to be passed in the future and the survival time as an estimated value of the traveling time for traveling in the wireless zone to the router 14 and the wireless zone 8. Router corresponding to
5 as well as all the end point position information to the router 15 corresponding to the wireless zone which will be passed in the future. The end point address forming the end point position information is actually a combination of the wireless zone ID and the terminal number.

The survival time in FIG. 11 is an estimated value of the time required to travel in each wireless zone as described above, and the terminal 10 estimates this value and notifies it to the counterpart terminal 19 or the like. The first and simplest method of setting this survival time
The method is to set a value between the minimum required time and the maximum required time in the rule of FIG.

As described above, this rule is sent from the mobile control server 18 of FIG. 2 to the mobile terminal 10, and the mobile terminal 10 can estimate the survival time by using this rule.

A second method for estimating survival time is
This is a method of using the actual travel time for a wireless zone that has already passed through. In FIG. 8, when the vehicle enters the wireless zone 19, it has already passed through the wireless zone 2 and the wireless zone 8. If the traveling times required to pass through these zones are t1r and t2r, the total traveling time is , And the survival time t33 for the wireless zone 19 can be set by the following equation by obtaining the ratio with the total of the required maximum times in the rule of FIG. 10 and multiplying the ratio by the required maximum time t32 for the wireless zone 19, for example. it can.

T ₃₃ = t ₃₂ (t _1r + t _2r ) / (t ₁₂ + t ₂₂ ) Similarly, the survival time t ₄₃ for the wireless zone 20 can be set by the following equation.

T ₄₃ = t ₄₂ (t _1r + t _2r ) / (t ₁₂ + t ₂₂ ) Even when the survival times t33 and t43 are set in this way, packet transfer is performed between the mobile terminal and the router or the partner terminal. When transferring data, it is necessary to consider the packet transmission time. FIG. 12 is an explanatory diagram of packet transmission timing from the mobile terminal, the router, or the partner terminal.

FIG. 12 shows notification of plural end point position information from the mobile terminal to the router or the partner terminal,
It indicates that even if the mobile terminal transmits the plural end point position information at the time of entering the wireless zone 19, it takes ttx time to reach the partner terminal or the router.

FIG. 12 shows that the time until the packet sent from the router or the partner terminal is transmitted to the mobile terminal is trx, and the arrival time of the packet and the time when the mobile terminal enters the wireless zone 20. It indicates that they match.

Even if the packet arrives at the router or access point corresponding to the wireless zone after the movement before the mobile terminal moves to the next wireless zone, since the mobile terminal does not exist in that zone, The packet cannot be transmitted, and it is desirable to transmit the packet in consideration of a certain time margin td. FIG. 12 shows packet transmission in the case where such a margin is taken into consideration.

In addition, for example, the router determines the margin td.
It is shown that if the next packet is transmitted to the next wireless zone after the time t43 has elapsed from the time of transmitting the packet, the packet will surely reach the mobile terminal.

FIG. 13 and FIG. 14 are explanatory views of the data structure of the end point position information notified from the mobile terminal 10 to, for example, the partner terminal or the router. FIG. 13 shows the contents of the IPv6 header and the extension header that is arbitrarily added. When only one piece of end point position information is notified, the address (care of address) as the end point position information is IP.
It is the source address in the v6 header and the lifetime is the lifetime in the extension header. This end point position information is notified to the router or the partner terminal specified by the destination address.

FIG. 14 shows the contents of the extension header when a plurality of end point position information is notified. As described in FIG. 13, the source address in the IPv6 header corresponds to the content of the end point address field in the first line of FIG. 11, and the lifetime # 1 in the extension header corresponds to the content of the survival time field in the first line. Equivalent to. The care-of address # 2 and lifetime # 2 in the extension header correspond to the contents of the end-point address field and the time-to-live field on the second line of FIG. The corresponding lifetime is stored in the extension header.

FIG. 15 is a flow chart of a management process of rules, that is, connection point change information, by the mobility control server. When the process is started in the figure, first in step S1, for example, a timer for periodically transmitting connection point change information to the access point 17 in FIG. 2 is activated, and in step S2 the timer times out. If it is not timed out yet, it is determined in step S3 whether or not, for example, data from the mobile terminal 10 has been received. If no data has been received, the processing in step S2 and subsequent steps is performed. Repeated.

If data has been received, step S
In 4, it is judged whether or not the data is maintenance data of the rule database, that is, data in which a new rule is registered in the rule database, a rule is deleted, or the entire rule is rewritten. In this case, the rule is newly registered, deleted, and rewritten in the rule database in step S5, and step S2
The subsequent processing is repeated.

If it is not the maintenance data in step S4, it is determined in step S6 whether or not the data is the connection point change information correction data, for example, the data requesting the correction of the required minimum time or the required maximum time for a certain wireless zone ID in FIG. Is determined, and if the data is such data, the correction data is sent to the rule correction processing routine described in FIG. 16 in step S7, and the processing from step S2 onward is repeated.

If it is not the connection point change information correction data in step S6, it is determined in step S8 whether or not it is a connection point change information data from the mobile terminal 10, that is, a rule read request, and such a request is made. If the connection point change information data is read in step S9, the data is transmitted in step S10, and if the connection point change information data read request is not made, the connection point change information data is read in step S11. After the requested processing other than the processing is executed, the processing from step S2 is repeated.

When it is determined in step S2 that the timer has timed out, the rule, that is, the connection point change information database is read out for periodical transmission in step S12, and the data is transmitted in step S13. The processing after S1 is repeated.

FIG. 16 is a flowchart of a rule correction processing routine by the mobility control server. In this processing routine, the minimum required time or the maximum required time of a certain wireless zone ID with respect to the rule described with reference to FIG. 10 is corrected. When a vehicle actually travels on a highway and the required travel time does not fall within this range, the mobile terminal 1
A correction request and data therefor are sent from 0 to the mobility control server 18. The correction data can be transmitted at any timing, but can also be transmitted at the timing of notifying the destination terminal or the router of the end point position information.

FIG. 17 shows an example of such correction data. In the figure, for the ID of each wireless zone, the time spent in the area, that is, the actual time taken from entering the zone to exiting the zone, and the time when entering the wireless zone are calculated from the mobile terminal 10 to the mobile control server 18 Will be sent to. The time of entering the wireless zone is reference data for knowing whether it is a time zone when the road is crowded, such as in the evening.

In the processing routine shown in FIG. 16, the correction data sent from the mobile terminal 10 is processed as shown in FIG. As a result, the connection point change information is not corrected.

Therefore, in step S20, a timer for delimiting the period for counting the number of input correction data is started, and in step S21 it is determined whether or not the connection point change information correction data is received. After the cumulative distribution of the in-service time is created in step S22,
If the correction data is not received, immediately, step S
In 23, it is determined whether or not the timer has timed out. If the timer has not timed out yet, the processing from step S21 is repeated.

The processing of FIG. 16 will be described later in step S.
After the process of 27, the process returns to the step S20, that is, the timer is restarted and is always executed. The process of step S21 is executed in an interrupt-like form corresponding to the process of step S7 of FIG. To be done.

If it is determined in step S23 that a time-out has occurred, it is determined in step S24 whether or not any of the cumulative values, that is, the number of input correction data for each wireless zone ID until the time-out occurs, exceeds a threshold value. If it is determined that even one exceeds the threshold value, the average value of the in-zone time for the wireless zone ID whose number of inputs exceeds the threshold value is calculated in step S25, and the new connection point is changed using the average time in step S26. After the information has been sought and the rules have been modified, and immediately if no thresholds have been exceeded in step S24, step S27.
Then, the cumulative value is reset, and the return operation, that is, the processing from step S20 is repeated.

FIG. 18 is a flow chart of processing by the mobile terminal 10. When the process is started in the figure, first, in step S31, it is determined whether or not a new wireless zone is detected. This determination is performed based on each wireless zone, that is, the ID sent from the router corresponding to the area. If a new wireless zone has not been detected yet, the determination of the detection is continued.

When a new wireless zone is detected,
In step S32, it is determined whether or not the connection control point change information, that is, the rule is notified from the movement control server 18, and if so, the rule is stored in step S33 and a plurality of end point position information is notified. The value of the counter that counts the number of times the normal end point position information is notified is reset.

Then, in step S34, the measurement of the time until entering the next wireless zone is started, and it is determined in step S35 whether or not the connection point change information is met, that is, whether or not the rule is met. If the detection of a new wireless zone in step S31 means entering an interchange on an expressway, or if it is detection at power-on, it is possible to measure the time until passing through the wireless zone. It has not been performed yet, and it is determined that the connection point change information does not apply.

Then, in step S38, as the normal end point position information, the end point address of the new wireless zone detected in step S31 and the scheduled time for staying in that zone,
That is, the survival time is notified to the partner terminal, the router for the home link, the router corresponding to the new wireless zone, and the wireless zone that existed immediately before.

Next, in step S39, it is determined whether or not a new wireless zone is detected, that is, whether or not the wireless zone next to the wireless zone detected in step S31 is entered.
If not detected yet, it is determined in step S40 whether the required time has elapsed. This required time corresponds to the maximum required time for passing through each wireless zone in the rule described with reference to FIG. 10, and if it has not elapsed yet, the determination in step S39 is continued.

When the required time has passed, it means that the maximum required time has passed before entering a new wireless zone.
After the normal end point position information is notified in step S41, the determination in step S39 is continued. The normal end point position information notified here corresponds to the new wireless zone initially detected in step S31, and notifies the router or the like that the mobile terminal is still in that wireless zone. .

As will be described later with reference to FIG. 19, when a plurality of end point position information is notified from the mobile terminal 10, for example, the end point position information estimated to be valid at that time point is judged by the survival time in each end point position information. The end point address is registered in the binding cache, and when the time to live expires, the binding cache is rewritten,
The end point address in the next end point position information is registered in the binding cache. The notification of the end point position information in step S41 is for preventing the rewriting of the binding cache.

When a new wireless zone is detected in step S39 and it is determined that the next wireless zone has been entered, in step S42, the measurement of the time started in step S34 is terminated, and the measured value is stored. The processing from step S32 is repeated.

Even if it is determined in step S32 that the new connection point change information is not notified, step S4
If the connection point change information stored in 5, that is, the rule is valid, measurement of the travel time until entering the next wireless zone is started in step S34.

The measurement of the running time is started in step S
It is considered that this should be executed immediately when a new wireless zone is detected in 39, but if it can be ignored as compared with the traveling time of the vehicle, the time required for the processing of steps S32 and S45 will be stored. It is sufficient to start the measurement when it is determined that the rules in force are valid and the measurement should be performed.

Subsequently, in step S35, it is determined whether the connection point change information is satisfied, that is, whether the rule is established. This determination is performed using the measurement value stored in step S42. And this measured value is shown in FIG.
If it is within the required minimum time and the required maximum time described in step 1, it is determined that the rule is established, and it is determined in step S36 whether or not the prescribed number of times at which the plural end point position information should be notified has been reached. .

Whether or not this is determined by the measurement of the traveling time to comply with the rule, and whether the number of times the normal end point position information has been notified has reached the prescribed number of times at which the plurality of end point position information should be notified according to the judgment If not yet reached, the end point position information notification count is counted up in step S37, the normal end point position information is notified in step S38, and the processes from step S39 onward are executed.

On the other hand, if it is determined in step S36 that the specified number of times has been reached, it is determined in step S43 whether or not the plural end point position information has already been notified, and if it has not been notified yet, After the notification of the plurality of end point information in step S44, the processing in step S39 and subsequent steps is performed. If it is determined in step S43 that the notification of the plural end point position information has already been made, the processing in step S39 and subsequent steps is immediately performed.

In step S32, it is determined that the connection point change information has not been sent from the mobile control server side,
Connection point change information stored in step S45,
That is, if the rule is already invalid, step S
31 or the new wireless zone detected in step S39 is a zone to which the rule cannot be applied, and the return, that is, the process from the start is repeated after the notification of the normal end point position information is performed in step S46. . Note that, immediately before this, even if a new wireless zone is detected in step S39 and the measured value is stored in step S42, the measured value is discarded as invalid.

FIG. 19 is a processing flowchart of the home link router, that is, the router 14 of FIG. In this processing, when the mobile terminal 10 enters a new wireless zone (area), the end point address and the time to live for the wireless zone are set as described in FIG. 11 is a flowchart of a process executed when a plurality of sets are notified, including the above.

When the process is started in FIG. 19, it is first determined in step S51 whether or not the end point position information has been received, and if it has not been received, the reception is continuously monitored.

When it is determined that the end point position information has been received,
In step S52, it is determined whether or not the number of pieces of information, that is, the data of the end point address field and the survival time field of FIG. 11 are plural respectively, and if there are plural pieces of data, the data is ended point position information list in step S53. In step S54, after the top information of the end point position information list is selected, and when there is only one end point position information in step S52, the process immediately proceeds to step S55.

At step S55, the end point position information is registered in the binding cache, at step S56 a counter for the survival time is activated, and at step S57 it is determined whether or not the end point position information is received. Based on the value of the counter activated in step S58, it is determined whether or not the end of the survival time is near, that is, whether or not the remaining time is equal to or less than a predetermined value set in advance.
The processing after 57 is repeated.

If it is determined in step S58 that the survival time is about to end, it is determined in step S59 whether or not there is next end point position information.
At 0, it is determined whether or not the survival time as the count value of the counter started at step S56 has become 0, and if it has not become 0, the processing from step S57 is repeated.

When it is determined in step S60 that the survival time has become 0, the next end point position information is selected from the end point position information list in step S61, and the information of the end point position where the survival time has expired is determined in step S62. After being deleted from the information list, the processing from step S55 is repeated. If it is determined in step S57 that new end point position information has been received, the processing from step S52 onward is repeated.

When it is determined in step S59 that there is no next end point position information, the connection with the mobile terminal 10 is confirmed in step S63, and if the connection is established, the end point position information is acquired in step S64. It is determined whether or not 10 is being requested. If not being requested, a new end point position information is requested to the mobile terminal 10 in step S65, and then the survival time becomes 0 in step S66. If it is determined, the process of step S51 and subsequent steps is repeated, and if it is not 0, the process of step S57 and subsequent steps are repeated.

If the communication connection is not being established in step S63, and if the request for the end point position information has already been issued to the mobile terminal 10 in step S64, it is determined in step S66 whether the survival time has become zero. The process after the determination is repeated.

FIG. 20 is a flowchart of the processing by the foreign link router 15 of FIG. This process
In FIG. 19, when it is determined in step S59 that there is no next end point position information, the process proceeds from step S63 to step S63.
The difference is that the process immediately proceeds to the process of determining whether the survival time has become 0 in step S66 without executing the process of 65.

In the router 15 corresponding to the foreign link in FIG. 2, this is because the mobile terminal 10 has already moved to another area (radio zone), and the plurality of end point position information previously notified from the mobile terminal 10 is invalid. If, for example, data is sent from the other terminal side,
This is because it is unavoidable to discard the data without transferring the data to another foreign link. On the other hand, in the process of the home link router 14 described in FIG. 19, the communication connection is valid. In this case, it is necessary to request new end point position information from the mobile terminal side so that the data can always be transferred to the mobile terminal 10.

In the above description, the connection point change information, that is, the rule, is created by the mobile control server 18 and notified to the mobile terminal 10. However, the mobile terminal 10 can create the rule autonomously. . That is, rules are created using map database software, traffic information, navigation information, and ETC (Electronic Toll Collection System) radio waves.

[0123] Using the navigation information, check the information of the entrance and exit of the expressway, determine the number of the wireless zone to pass through from the map database, and use the traffic information to find the in-zone time of each wireless zone. Rules are created autonomously by.

The mobile terminal 10 can also send the created rule to the mobility control server 18. In addition, the processing described in the flowchart of FIG. 18 is performed using the created rule,
Notify the destination terminal 19, the router 14 of the home link, the area previously visited, the area currently visited, and the router 15 corresponding to a plurality of areas to be moved in the future, respectively. can do.

21 and 22 are explanatory views of an example of data transmission / reception performed in the network in the present embodiment. In these figures, the connection point from the mobile control server 18 to the mobile terminal 10 at the first time point. Change information,
That is, the rules shall be notified.

In FIG. 21, before the mobile terminal 10 moves to the area B, for example, while the connection point change information is notified from the mobility control server while in the area A, the router B
In addition to the above, for example, the router advertisement is notified from the router A.

At the time when the mobile terminal 10 moves to the area B, the notification of the connection point change information is detected as described in step S32 of FIG. 18, and the mobile terminal 10 performs the binding update as the end point position information notification. Partner terminal, router B for area B after moving,
In addition to the home link router A, the mobile terminal was sent to the router in the area where the mobile terminal was located immediately before, and received the notification in response to the binding update notification from the other terminal, router A, router B, etc. Is acknowledged.

During the period when the mobile terminal 10 is near the boundary between the area B and the area C, the router advertisements are periodically notified from the router B and the router C,
When the mobile terminal 10 moves from the area B to the area C, the time required for the movement as described in step S35 of FIG. 18 corresponds to the connection point change information, that is, the rule, that is, the time range defined by the rule. It is determined whether or not

If the rule is satisfied and the prescribed number of times for notification of the plural end point position information is, for example, “0”, the plural end point position information as described in FIG. The router C for the area C, the router B for the area B immediately before moving, and the router A for the home link are notified, and the mobile terminal 10 is notified of the acknowledgment from the partner terminal or the like in response to the notification of the binding update.

When the mobile terminal 10 is near the boundary between the area C and the area D, the router advertisement is periodically notified from the router C and the router D, and the mobile terminal 10 transfers the area C to the area D as shown in FIG. When it moves to, the end point position information has already been notified as described in step S43 of FIG. 18, and since the information is valid, the processing enclosed by the square in FIG. 22 is unnecessary.

While the mobile terminal 10 is near the boundary between the area D and the area E, router advertisements are periodically notified from the router D and the router E, and even when the mobile terminal 10 moves from the area D to the area E. If the already notified plurality of end point position information are valid, the process surrounded by a square when moving to the area D is unnecessary. This point has the greatest feature of this embodiment.

23 and 24 are connection point change information,
That is, when the rule is required on the mobile terminal 10 side without the rule being notified from the mobile control server 18 to the mobile terminal 10 in advance, transmission / reception of data when requesting the mobile control server 18 to transmit the rule Here is an example.

In FIG. 23, as described at the beginning of FIG. 21, the mobile terminal 10 moves to the area B without the connection point change information, that is, the rule, being transmitted from the mobile control server 18 to the mobile terminal 10 in advance. , Requesting connection point change information from the movement control server 18,
The difference is that, after the connection point change information is sent from the mobility control server 18 to the mobile terminal 10, the binding update notification described in FIG. 21 is sent to the partner terminal, etc. It is the same as FIG.

As described with reference to FIG. 15, in the present embodiment,
In principle, the rule created by the mobility control server 18 is periodically notified to the mobile terminals existing in the wireless zone to which the rule is applicable, via the router or the access point 17. , FIG. 23,
The transmission / reception example of FIG. 24 shows the operation when the rule is not transmitted from the mobile control server to the mobile terminal 10 for some reason.

In such a case, for example, after it is determined that the connection point change information stored in step S45 of the flowchart of FIG. 18 is not valid, the mobile terminal 10
Instead of executing the process of step S46, request the connection point change information from the mobile control server 18, acquire and store the information, and then reset the value of the counter to travel to the next wireless zone. It is also possible to start measuring the time and subsequently execute the processing after the notification of the normal end point position information in step S38.

25 and 26, for example, when the mobile terminal notifies a plurality of end point position information after moving from area B to area C in FIG. 21, the other terminal, home link router, This is an example of data transmission / reception in the case of notifying not only a router for an area and a router for an area immediately before moving, but also a router for a plurality of areas as future moving destinations.

In FIG. 25, after the mobile terminal 10 moves from the area B to the area C, the routers D, ... N is also notified, and in FIG. 26, the only difference is that the acknowledgment is notified to the mobile terminal 10 from these routers in response to the notification of the binding update. This eliminates the need for a mobile terminal in standby, which is not communicating, to send a binding update as a packet transfer request to the router in the previous area each time it moves in the area, and the mobile terminal moves at high speed. However, it is possible to avoid packet discard.

The details of the mobile communication terminal, the mobile control server, the router, and the data communication system constituted by them of the present invention have been described above. However, the mobile communication terminal and the like are naturally equipped with a general computer. It is included as an element. FIG. 27 is a configuration block diagram of such a computer, that is, a hardware environment.

In FIG. 27, the computer is a central processing unit (CPU) 80, a read only memory (ROM) 8
1, a random access memory (RAM) 82, a communication interface 83, a storage device 84, an input / output device 85, a portable storage medium reading device 86, and a bus 87 to which all of these are connected.

As the storage device 84, various types of storage devices such as a hard disk and a memory card can be basically used depending on its size. 15, the programs shown in the flowcharts of FIGS. 16 and 18 to 20, the programs of claims 4 and 5 of the present invention are stored, and such programs are stored in the CPU 8
By being executed by 0, it becomes possible to collectively notify a plurality of end point position information from the mobile terminal to the partner terminal or a router corresponding to each of a plurality of areas in this embodiment.

Such a program may be stored in the storage device 84 from the program provider 88 side via the network 89 and the communication interface 83, or may be a commercially available and distributed portable storage medium 90. Stored in the CPU 80 and set in the reader 86.
Can also be performed by. As the portable storage medium 90, although this also depends on the size, a CD-ROM,
Various types of storage media such as a flexible disk, an optical disk, and a magneto-optical disk can be used, and the program stored in such a storage medium is read by the reading device 86.
By being read by, it becomes possible to collectively notify a plurality of end point position information from the mobile terminal in this embodiment.

(Supplementary Note 1) In a mobile terminal that can move between a plurality of areas and communicates with a partner terminal via a network, a plurality of areas for specifying each of the areas to be moved in the future can be specified. An end point position information notifying unit for collectively notifying outside of a plurality of sets of end point position information, each set including position information of each area and survival time indicating a planned period of stay in each of the plurality of areas A communication mobile terminal characterized by the above. (Supplementary Note 2) The communication mobile terminal according to Supplementary Note 1, wherein the end point position information notifying means notifies the plurality of sets of end point position information to the partner terminal.

(Supplementary Note 3) The end point position information notifying means is
The plurality of sets of end point position information is used as an area currently located in a plurality of data transfer devices corresponding to each of a plurality of areas, an area previously located, and a home link area of a mobile terminal. The communication mobile terminal according to appendix 1, wherein the data transfer apparatuses corresponding to the above are notified.

(Supplementary Note 4) The end point position information notifying means is
Among the plurality of data transfer devices corresponding to each of the plurality of areas, the plurality of sets of end point position information are simultaneously notified to the data transfer devices corresponding to each of the plurality of areas as future destinations. The mobile terminal for communication as set forth in appendix 1, which is characterized.

(Supplementary Note 5) In a communication system in which a mobile terminal movable between a plurality of areas communicates with a partner terminal via a network, the mobile terminal is located in the area where the mobile terminal moves and within the area. A mobile control server that creates a rule for predicting the period and sends the rule to the mobile terminal side is provided, and the mobile terminal checks the validity of the rule sent from the mobile control server. , When the rule is valid, the position information of each of the plurality of areas for specifying each of the areas to be moved in the future and the survival time indicating the planned period of stay in each of the plurality of areas are set to 1
A mobile communication system comprising: end point position information notifying means for collectively notifying a plurality of sets of end point position information to the outside. (Supplementary Note 6) The mobile terminal further comprises rule correction data transmission means for transmitting correction data of the rule to the mobile control server when the rule sent from the mobile control server is not valid. The communication system according to Appendix 5.

(Supplementary note 7) The communication system according to supplementary note 5, wherein the end point position notifying means sets the survival time based on a rule sent from the mobility control server.

(Supplementary Note 8) The end point position information notifying means is
6. The communication system according to appendix 5, wherein the survival time is set based on the rule sent from the mobility control server and the time spent in the area already moved.

(Supplementary Note 9) In a data transfer device corresponding to each of a plurality of areas and controlling transfer of communication data performed between communication terminals via a network, an area to be moved from a movable communication terminal in the future. To collectively receive a plurality of sets of end point position information, each of which is a set of position information of each of a plurality of areas for identifying each of the areas and a survival time indicating a planned period of stay in each of the plurality of areas. An end point position information acquisition unit and an end point position information storage unit that stores the end point position information in a list format in order to control transfer of communication data sent to the mobile terminal during the lifetime. A data transfer device characterized by the above. (Supplementary Note 10) Validity in which the data transfer device stores the position information currently determined to be valid based on the value of the survival time among the plurality of end point position information in the list format stored in the end point position information storage means. 10. The data transfer device according to note 9, further comprising end point position information storage means.

(Supplementary Note 11) When the data transfer device corresponds to the home link area of the mobile terminal and the mobile terminal is normally connected to the network, the acquired plural sets of end point position information are When all are invalid, end point position information request that requests, as end point position information, position information of at least the area currently in the area to the mobile terminal, and survival time indicating the planned period of stay in the area 10. The data transfer device according to appendix 9, further comprising means.

(Supplementary Note 12) In a program used by a computer that constitutes a mobile terminal that is movable between a plurality of areas and that communicates with a partner terminal via a network, if the mobile terminal moves A procedure for receiving a rule indicating position information of each of the predicted plurality of areas and a prediction period existing in each of the plurality of areas, a procedure of verifying the validity of the rule, and a case where the rule is valid. , A plurality of sets of end point position information in which position information of each of a plurality of areas for specifying each of the areas to be moved in the future and a survival time indicating a planned period of stay in each of the plurality of areas are one set A program for causing a computer to execute the procedure for collectively notifying the outside. (Supplementary Note 13) The procedure for verifying the validity of the rule measures the time spent in each area in the rule each time it passes through each area, and the measurement result is within the time range described in the rule. 13. The program according to note 12, further comprising: a step of incrementing the counter when, and a step of determining that the rule is valid when the count value of the counter reaches a predetermined value.

(Supplementary Note 14) It is movable in a program corresponding to each of a plurality of areas and used by a computer which constitutes a data transfer device for controlling transfer of communication data performed between communication terminals via a network. End point position information, which includes, from the communication terminal, position information of each of a plurality of areas for specifying each of the areas to be moved in the future, and survival time indicating a planned period of stay in each of the plurality of areas. And a procedure for storing the plurality of end point position information in a list format in order to control the transfer of communication data sent to the mobile terminal during the life time. A program that causes a computer to execute and. (Supplementary Note 15) The program further comprises a procedure of storing position information of an area currently determined to be valid based on the value of the survival time among the plurality of end point position information stored in the list format. The program according to Appendix 14, which is

(Supplementary Note 16) In a storage medium used by a computer constituting a mobile terminal that is movable between a plurality of areas and communicates with a partner terminal via a network, the mobile terminal can be moved. Then, a step of receiving a rule indicating position information of each of the plurality of predicted areas and a prediction period existing in each of the plurality of areas, a step of verifying the validity of the rule, and the rule being valid Time,
A plurality of sets of end point position information, each of which includes position information of each of a plurality of areas for specifying each of the areas to be moved in the future and a survival time indicating a planned period of stay in each of the plurality of areas, is set. A computer-readable portable storage medium that stores a program for causing a computer to execute the steps of collectively notifying the outside.

(Appendix 17) Movable in a storage medium used by a computer which corresponds to each of a plurality of areas and which constitutes a data transfer device for controlling transfer of communication data performed between communication terminals via a network. End position with a set of position information of each of a plurality of areas for specifying each of the areas to be moved in the future from a different communication terminal and a survival time indicating a planned period of stay in each of the plurality of areas The step of receiving a plurality of sets of information at a time, and storing the plurality of end point position information in a list format in order to control transfer of communication data sent to the mobile terminal during the lifetime. A computer-readable portable storage medium that stores a program for causing a computer to execute the steps.

(Supplementary Note 18) In a program used by a computer that constitutes a mobile terminal that is movable between a plurality of areas and communicates with a partner terminal via a network, the mobile terminal will move in the future. A plurality of sets of end point position information including a set of position information of each of a plurality of areas for identifying each of the planned areas and a survival time indicating a prediction period existing in each of the plurality of areas are collectively described. A program that causes a computer to execute a procedure for notifying the outside by a computer.

[0155]

As described in detail above, according to the present invention, the location information of the area to be moved from the mobile terminal to the partner terminal or the router, including the current area, and the area By collectively notifying a plurality of end point position information in which the period staying at 1 is set, it is possible to reduce the transmission amount of control information in the network,
Further, it becomes possible to suppress the power consumption on the side of the mobile terminal, which largely contributes to the improvement of the practicality of the mobile communication system.

[Brief description of drawings]

FIG. 1 is a block diagram showing a principle configuration of the present invention.

FIG. 2 is a block diagram showing a configuration of a data transmission system in the present embodiment.

FIG. 3 is a block diagram of a configuration example of a mobile terminal.

FIG. 4 is a block diagram showing a configuration example of a router.

FIG. 5 is a diagram showing an example of stored contents of a binding cache.

FIG. 6 is a diagram showing correspondence between end point addresses and destination networks.

FIG. 7 is a block diagram showing a configuration example of a mobility control server.

FIG. 8 is an explanatory diagram of a wireless zone for explaining connection point change information and rules.

FIG. 9 is an explanatory diagram of a time required to move on a highway.

FIG. 10 is an explanatory diagram of rules.

FIG. 11 is an explanatory diagram of a plurality of end point position information.

FIG. 12 is an explanatory diagram of packet transmission in consideration of transmission time.

FIG. 13 is an explanatory diagram (part 1) of a method of storing end point position information in a packet header.

FIG. 14 is an explanatory diagram (part 2) of the method of storing the end point position information in the packet header.

FIG. 15 is a processing flowchart of a mobility control server.

FIG. 16 is a flowchart of a rule correction processing routine by the mobility control server.

FIG. 17 is an explanatory diagram of rule correction data sent from a mobile terminal.

FIG. 18 is a flowchart of a process performed by a mobile terminal.

FIG. 19 is a processing flowchart of a home link router.

FIG. 20 is a flowchart of a process performed by a foreign link router.

FIG. 21 is an explanatory diagram (part 1) of an example of data transmission / reception performed in the network.

FIG. 22 is an explanatory diagram (part 2) of an example of data transmission / reception performed in the network.

FIG. 23 is an explanatory diagram (part 1) of an example of data transmission / reception when a mobile terminal requests transmission of a rule.

FIG. 24 is an explanatory diagram (part 2) of an example of data transmission / reception when the mobile terminal requests transmission of a rule.

FIG. 25 is an example (part 1) of data transmission / reception in the case of notifying routers of a plurality of areas of future destinations of a plurality of end point position information.

[Fig. 26] Fig. 26 is an example (part 2) of data transmission / reception in the case of notifying routers of a plurality of areas of future destinations of a plurality of end point position information.

FIG. 27 is a diagram illustrating loading of a program into a computer according to the present embodiment.

FIG. 28 is a block diagram showing a configuration of a conventional example of a data transmission system.

FIG. 29 is a diagram showing an example of data transmission / reception in the conventional example of FIG. 28.

[Fig. 30] Fig. 30 is a block diagram illustrating a configuration of a conventional example of a communication system that performs simultaneous calling.

31 is a diagram illustrating the amount of control information in FIG. 30.

32 is a diagram showing a hierarchical structure of a location registration area in the system of FIG.

[Explanation of symbols]

1,10 Mobile terminal 2,19 Other terminal 3 network 4,5 data transfer device 11 trunk LAN or WAN 12 Home Links 13 Foreign Link 14 Router (home link side) 15 Router (foreign link side) 16 Router (remote terminal side) 17 access points 18 Mobility control server

   ─────────────────────────────────────────────────── ─── Continued front page    F term (reference) 5K033 DA02 DA19 DB16 EA03                 5K067 AA13 AA43 BB21 BB41 EE02                       EE10 EE16 FF03 HH17 HH21                       HH22 HH23

Claims (5)

[Claims] 1. A mobile terminal, which is movable between a plurality of areas and communicates with a partner terminal via a network, for identifying each of the areas to be moved in the future. End position information notifying means for collectively notifying outside of a plurality of sets of end position information having one set of position information and a lifetime that indicates a planned period of stay in each of the plurality of areas. A characteristic mobile terminal for communication. 2. In a communication system in which a mobile terminal movable between a plurality of areas communicates with a partner terminal via a network, an area in which the mobile terminal moves and a period in which the mobile terminal exists. And a mobile control server for transmitting the rule to the mobile terminal side, and the mobile terminal checks the validity of the rule sent from the mobile control server, When the rule is valid, the position information of each of the plurality of areas for identifying each of the areas to be moved in the future and the survival time indicating the planned period of stay in each of the plurality of areas are set as one set. A mobile communication system comprising an end point position information notifying means for collectively notifying a plurality of sets of end point position information to the outside. 3. A data transfer device that corresponds to each of a plurality of areas and controls transfer of communication data performed between communication terminals via a network. End point position for collectively receiving a plurality of sets of end point position information, each set including position information of each of a plurality of areas for identifying the area and survival time indicating a planned period of stay in each of the plurality of areas An information acquisition unit and an end point position information storage unit that stores the end point position information in a list format in order to control transfer of communication data sent to the mobile terminal during the lifetime. Characteristic data transfer device. 4. A program used by a mobile terminal, which is movable between a plurality of areas and communicates with a partner terminal via a network, wherein each of the plurality of predicted mobile terminals is expected to move. A procedure for receiving a rule indicating the position information of the area and the prediction period existing in each of the plurality of areas, a procedure for verifying the validity of the rule, and a plan to move in the future when the rule is valid. Position information of each of a plurality of areas for identifying each of the areas,
A program for causing a computer to collectively notify the outside of a plurality of sets of end point position information, each set including a survival time indicating a planned period of stay in each of the plurality of areas. 5. A mobile communication terminal in a program corresponding to each of a plurality of areas, which is used by a computer constituting a data transfer device for controlling transfer of communication data performed between communication terminals via a network. From the above, a plurality of pieces of end point position information, each of which is a set of position information of each of a plurality of areas for specifying each of the areas to be moved in the future and a survival time indicating a planned period of stay in each of the plurality of areas, are set. And a procedure for storing the plurality of end point position information in a list format in order to control transfer of communication data sent to the mobile terminal during the life time. A program that causes a computer to execute.