JP2002027558A - Mobile communication system and network connecting system used for it - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a mobile communication system which can shorten the time for a reconnection after a line is disconnected when a network is connected by a dialing-up operation. SOLUTION: By a communication control part 22 at a server 2, connection information (a telephone number, authentication information, an allocation address) on a communication to be performed between an own station and a partner station is stored in a connection-information storage region. When the disconnection of the line is generated, whether the disconnection is caused by a normal disconnection intended by a user or an abnormal disconnection due to the aggravation of a radio-wave level is determined. The part 22 measures the time for the reconnection in the case of the abnormal disconnection, it acknowledges the authentication of a connection by the telephone number from a communication control part 12 at a terminal 1 when the connection is performed within the time for the reconnection, and it completes the connection of the network only by a link establishment processing operation.

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 a network connection system used for the same, and more particularly to a dial-up network connection system used between a terminal and a server.

[0002]

2. Description of the Related Art Conventionally, in this type of network connection system, generally, RFC (Request For
Comment) The PPP of the layer 2 protocol (data link layer protocol) standardized by 1661
(Point-to-Point Protocol) is used.

[0003] PPP is an LCP (Link Controller).
ol Protocol) and NCP (Network)
Control Protocol).

[0004] LCP is mainly composed of a link establishment control unit and an authentication control unit, and is a protocol for performing link establishment control and user authentication control after being physically connected to a line, and NCP is a layer 3 protocol ( This is a protocol for allocating addresses used by a network layer protocol. For example, if the network layer is an IP (Internet
In the case of (T Protocol), a function of allocating an IP address is provided.

[0005] In the conventional network connection, when making a network connection from a terminal, a call is made from the terminal to a server, a link is established and authentication processing is performed by an LCP after a physical communication line is connected, and a network layer is performed by an NCP. In this procedure, an address allocation process is performed to complete connection to a network.

[0006]

In the above-described conventional network connection method, generally, standardized RF is used.
In the case of the C1661 network connection method, the LCP link establishment / authentication, the NCP address assignment processing, and the like are performed each time a line connection is performed, and it takes time until the terminal can communicate with the network layer protocol.

In particular, mobile phones and PHS (Persona)
In the case of using a mobile body such as l Handyphone System, the line is frequently disconnected, the time required for reconnection is long, and it is not easy to use.

[0008] As a method of reconnection in the above network connection, Japanese Patent Application Laid-Open No. Sho 60-204134 (No. 1)
JP-A-6-334600 (second publication), JP-A-8-19049 (third publication), and the like.

The first gazette discloses a method for shortening the time from when the cordless handset goes off-hook to when the connection to the base unit is completed in the cordless telephone device, and the second gazette discloses the method. A method for dealing with a call outside the communicable range between a master unit and a slave unit in a cordless telephone device is disclosed.

The third publication discloses a technique relating to an automatic call re-establishment method after restoration from a failure in a digital mobile communication system, that is, a technique relating to reconnection of a telephone network, and stores a telephone number. In addition, when a failure occurs in a wireless channel, a call is automatically made.

Even if the techniques disclosed in the first to third publications are used, it is not possible to shorten the connection time to the network in the reconnection after the transmission / reception restriction timer.

Accordingly, an object of the present invention is to provide a mobile communication system capable of solving the above-mentioned problems and shortening the time required for reconnection after a line disconnection in a dial-up network connection, and a network connection system used therefor. Is to do.

[0013]

SUMMARY OF THE INVENTION A mobile communication system according to the present invention has storage means for storing connection information for communication to be carried out between a local station and a partner station, and a determination for determining a reason for disconnecting a communication line. Means, and a measuring means for measuring a time until reconnection, and configured to perform connection by using connection information stored in the storage means for reconnection after a line is disconnected during communication. .

A network connection system for a mobile communication system according to the present invention includes a step of storing connection information of communication to be performed between the own station and a partner station, a step of determining a reason for disconnecting a communication line, And a step of measuring a time until the connection, and the connection is made using the connection information for reconnection after the line is disconnected during the communication.

That is, according to the network connection method of the present invention, means for storing connection information (telephone number, authentication information, assigned address) of the other party connected in the network connection, and the reason for disconnection when the line disconnection occurs Has a means to determine whether the disconnection is the intended normal disconnection or an abnormal disconnection due to the deterioration of the radio wave level, and a means to measure the reconnection time at the time of the abnormal disconnection. To complete the network connection.

That is, in the network connection system of the present invention, both the server and the terminal store connection information (telephone number, authentication information, and assigned address) at the time of connection, and link by re-connection after abnormal disconnection of the line. Perform only the establishment process,
Authentication is completed by the telephone number of the terminal side, and connection to the network is completed.

This makes it possible to shorten the reconnection time when an abnormal disconnection occurs due to deterioration of the radio wave level when connecting to a network using a mobile phone or the like.
Efficient communication becomes possible.

[0018]

Next, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram showing a configuration of a mobile communication system according to one embodiment of the present invention.
In FIG. 1, a mobile communication system according to an embodiment of the present invention includes at least one terminal (personal computer, portable terminal, or the like) 1 as a mobile station, a server 2 as a fixed station, and a wireless network for the mobile station. Communication network 1
00.

The terminal 1 and the server 2 can perform data communication by being connected via the communication network 100. The terminal 1 and the server 2 are connected to a communication network 100.
Communication devices 3 and 4 are provided as communication interfaces between the communication device 1 and the communication device 3.

The communication devices 3 and 4 are composed of, for example, a modem connected to an RS232C terminal or an I / O (input / output) terminal of the terminal 1 or the server 2, and a radio transceiver connected to the modem. When the incoming phone number is RS232
The terminal 1 and the server 2 can be notified via the C terminal or the I / O terminal. For example, a mobile phone or a PHS can be used as the wireless transceiver.

Here, the terminal 1 and the server 2 are respectively connected to the network control units 11 and 21 and the communication control units 12 and 22.
And In this embodiment, it is assumed that the terminal 1 has a calling function and a calling function, the server 2 has only a calling function, and does not have a calling function.

FIG. 2 is a block diagram showing a configuration of the communication control unit 12 of the terminal 1 in FIG. In FIG. 2, a communication control unit 12 includes a line control unit 12a and a link establishment control unit 12b.
, An authentication control unit 12c, an address control unit 12d, and a connection information storage unit 12e.

FIG. 3 is a block diagram showing the configuration of the communication control unit 22 of the server 2 in FIG. In FIG. 3, a communication control unit 22 includes a line control unit 22a and a link establishment control unit 22b.
, An authentication control unit 22c, an address control unit 22d, a connection information storage unit 22e, and a work area 22f.

FIG. 4 is a sequence chart showing the exchange of protocol data at the time of initial connection in one embodiment of the present invention, and FIG. 5 is a sequence chart showing the exchange of protocol data at the time of reconnection in one embodiment of the present invention. It is.

FIG. 6 is a flowchart showing an operation up to network connection in the communication control unit 22 of the server 2 in FIG. 1. FIG. 7 is a flowchart showing the operation of the communication control unit 2 in the server 2 in FIG.
8 is a flowchart showing an operation when a line disconnection occurs, and FIG. 8 is a flowchart showing an operation up to network connection in the communication control unit 12 of the terminal 1 in FIG. The operation of the mobile communication system according to one embodiment of the present invention will be described with reference to FIGS.

In the initial state, the connection information is not stored in the connection information storage sections 12e and 22e of the terminal 1 and the server 2, respectively. First, a call is made from the line control unit 12a of the terminal 1, and the line control unit 2a of the server 2
When 2a responds to the incoming call, a line is connected between the terminal 1 and the server 2. After this line connection, the line control unit 22a of the server 2 stores the telephone number of the terminal 1 that has transmitted the call in the work area 22f, and completes the line connection (step S1 in FIG. 6).

When the communication control unit 12 of the terminal 1 confirms the line connection (step S31 in FIG. 8), the link establishment control unit 12
b, and transmits a link establishment request F1 from the terminal 1 to the server 2 to establish a link (step S32 in FIG. 8).

Upon receiving the link establishment request F1 (step S2 in FIG. 6), the communication control unit 22 of the server 2 refers to the connection information storage unit 22e and stores the stored telephone number of the terminal 1 and the work area 22f. And determines whether they are the same (step S in FIG. 6).
3).

At this point, since the connection information is not stored, step S
Proceed to 4 to return a link establishment approval F2. Upon receiving the link establishment acknowledgment F2, the communication control unit 12 of the terminal 1 (FIG. 8)
In step S33, it is determined whether the type of the link establishment acknowledgment F2 is normal or reconnection (step S34 in FIG. 8).

At this point, since normal link establishment approval is given, the terminal 1 activates the authentication control unit 12c and proceeds to authentication processing. In the authentication process, the terminal 1 sends an authentication request F3 to the server 2
(Step S35 in FIG. 8).

When the server 2 receives the authentication request F3 (step S5 in FIG. 6), the authentication approval F4 for approving the user authentication is issued.
(Step S6 in FIG. 6). The communication control unit 12 of the terminal 1 receives the authentication approval F4 (step S3 in FIG. 8).
6), start the address control unit 12d and proceed to the address assignment processing.

In the address assignment process, the terminal 1 transmits an address assignment request F5 used in the network layer protocol from the terminal 1 to the server 2 (step S37 in FIG. 8). Server 2
Receives the address assignment request F5 (step S5 in FIG. 6).
7) The address to be used is determined, and the assigned address F6 is transmitted to the terminal 1 (step S8 in FIG. 6).

The communication control unit 12 of the terminal 1 assigns the address F
6 (step S38 in FIG. 8), the assigned address is stored in the connection information storage unit 12e, and the connection to the network is completed (step S41 in FIG. 8).

After transmitting the assigned address F6 to the terminal 1 (step S8 in FIG. 6), the server 2 stores the address assigned to the terminal 1, the authentication information of the terminal 1, and the telephone number in the connection information storage section 12e (FIG. 6). Six steps S9), the connection to the network is completed (FIG. 6, step S12).

Next, an operation when a line disconnection occurs in a network connection state will be described. The communication control unit 22 of the server 2 determines that a line disconnection has occurred (step S2 in FIG. 7).
1), the reason for disconnection is read from the line control unit 22a (step S22 in FIG. 7), and it is determined whether the disconnection is normal due to a disconnection request from the line control unit 12a of the terminal 1 or abnormal disconnection due to deterioration of the radio wave level or the like. (Step S2 in FIG. 7)
3).

If the connection is normally disconnected, the communication control unit 22 deletes the assigned address, authentication information, and telephone number of the terminal 1 stored in the connection information storage unit 22e (step S2 in FIG. 7).
4) Return to the line connection waiting state again (step S2 in FIG. 7)
6).

When the disconnection reason is abnormal disconnection (due to deterioration of the radio wave level), the communication control unit 22 starts a reconnection waiting valid timer (step S25 in FIG. 7) and returns to the line connection waiting state again (FIG. 7). Step S26).

When the reconnection waiting valid timer times out, the communication control unit 22 erases the assigned address, authentication information, and telephone number of the terminal 1 stored in the connection information storage unit 22e (step S24 in FIG. 7). Then, the process returns to the line connection waiting state again (step S26 in FIG. 7).

The operation when a reconnection is made in the reconnection waiting state will be described. At this time, the connection information storage unit 22e of the server 2 stores the address, authentication information, and telephone number of the terminal 1 that was connected before the line disconnection, and the terminal 1 and the server 2 are in the line connection waiting state. .

First, a call is made from the line controller 12a of the terminal 1, and when the line controller 22a of the server 2 responds to the incoming call, a line is connected between the terminal 1 and the server 2. After this line connection, the line control unit 22a of the server 2 stores the telephone number of the terminal 1 that has transmitted the call in the work area 22f, and completes the line connection (step S1 in FIG. 6).

When the communication control unit 12 of the terminal 1 confirms the line connection (step S31 in FIG. 8), the link establishment control unit 12
b, and transmits a link establishment request F1 from the terminal 1 to the server 2 to establish a link (step S32 in FIG. 8).

Upon receiving the link establishment request F1 (step S2 in FIG. 6), the communication control unit 22 of the server 2 refers to the connection information storage unit 22e and stores the stored telephone number of the terminal 1 and the work area 22f. And determines whether they are the same (step S in FIG. 6).
3).

At this point, since the connection information is stored, step S is performed in order to perform a link establishment process at the time of reconnection.
Proceed to 10, and return a link establishment approval (reconnection) F21. The server 2 completes the network connection using the authentication information and the assigned address stored in the connection information storage unit 22e (Step S11 in FIG. 6).

Upon receiving the link establishment acknowledgment F21 (step S33 in FIG. 8), the communication control section 12 of the terminal 1 determines whether the type of the link establishment acknowledgment F21 is normal or reconnection (step S8 in FIG. 8). S34).

Since the communication control unit 12 of the terminal 1 is the link establishment acknowledgment F21 for reconnection, the process proceeds to step S40, where the authentication request and address request processing are omitted, and the connection information storage unit 12
The network connection is completed using the address stored in e (step S41 in FIG. 8).

As described above, the connection information is stored in each of the server 2 and the terminal 1, and the authentication is completed with the telephone number of the calling side in the reconnection when the connection is abnormally disconnected. By completing network connection, unnecessary exchange of authentication data can be omitted and time can be reduced, so that reconnection processing after abnormal disconnection of the line due to deterioration of radio wave level etc. can be shortened. And communication efficiency can be improved.

[0047]

As described above, according to the present invention, the connection information of the communication to be performed between the own station and the other station is stored, the reason for disconnecting the communication line is determined, and the time until the reconnection is established. It is possible to reduce the time required for reconnection after a line disconnection in a dial-up network connection by making a connection and using the connection information to reconnect after the line is disconnected during communication. There is an effect that can be.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating a configuration of a mobile communication system according to an embodiment of the present invention.

FIG. 2 is a block diagram illustrating a configuration of a communication control unit of the terminal in FIG.

FIG. 3 is a block diagram illustrating a configuration of a communication control unit of the server in FIG. 1;

FIG. 4 is a sequence chart showing exchange of protocol data at the time of initial connection in one embodiment of the present invention.

FIG. 5 is a sequence chart showing exchange of protocol data at the time of reconnection in one embodiment of the present invention.

FIG. 6 is a flowchart showing an operation up to network connection in a communication control unit of the server in FIG. 1;

FIG. 7 is a flowchart illustrating an operation of the communication control unit of the server in FIG. 1 when a line disconnection occurs.

FIG. 8 is a flowchart showing an operation up to network connection in a communication control unit of the terminal in FIG. 1;

[Description of Signs] 1 terminal 2 server 3, 4 communication device 11, 21 network control unit 12, 22 communication control unit 12a, 22a line control unit 12b, 22b link establishment control unit 12c, 22c authentication control unit 12d, 22d address control Units 12e, 22e Connection information storage unit 22f Work area 100 Network

Claims (2)

[Claims] 1. A storage unit for storing connection information for communication to be performed between a local station and a partner station, a determination unit for determining a reason for disconnecting a communication line, and a measurement unit for measuring a time until reconnection. A mobile communication system characterized in that a connection is established by using connection information stored in the storage means for reconnection after a line is disconnected during communication. 2. A communication system comprising: a step of storing connection information for communication to be performed between a local station and a partner station; a step of determining a reason for disconnecting a communication line; and a step of measuring time until reconnection. A network connection method for a mobile communication system, wherein connection is made using the connection information for reconnection after a line is disconnected during communication.