JP2000188612A - Data communication equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To conduct communication of IP base on a point-to-point channel without the use of a point-to-point protocol PPP. SOLUTION: First a PHS (registered trademark) channel is connected (step S1). In this case, when respective terminals have this data communication equipment, an IP address is assigned and the terminals are authenticated. Thus, a later PPP connection processing can be omitted. Furthermore, when either of the terminals does not have this data communication equipment, a conventional PHS channel connection only is conducted. Then a PHS Internet access forum protocol PIAFS is connected (step S22). Then whether or not the IP address assignment and terminal authentication have already been made is discriminated (step S23), and when the IP address assignment and terminal authentication have already been made, the connection processing is finished. When it is not made, the PPP connection is made (step S24), and then connection is completed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a data communication apparatus for performing IP (Internet Protocol) -based data communication using a point-to-point line.

[0002]

FIG. 9 shows a PIAFS (PHS Internet).
Using Access Forum Standard, IP (Internet Pr
FIG. 3 is a diagram illustrating a protocol stack when performing (otocol) -based communication. First, connection processing between terminals will be described, and then a method of transmitting data between terminals will be described.

FIG. 10 is a diagram showing the order of connection of protocol stacks. At the time of connection, connection is made for each protocol stack in order from the lower protocol to the upper protocol in FIG. 9, and finally communication between the IP layers becomes possible.

[0004] First, a communication line is connected between terminals between PHS layers of each terminal, and a transmission path is secured (FIG. 10 (A)). Next, a procedure for performing data communication between the PIAFS layers using the transmission path secured in the PHS layer is determined, and the data stream can be transmitted (FIG. 10B). Next, PPP (Point t
o Point Protocol), settings for using an IP address on the transmission path of the data stream provided by the PIAFS layer and terminal authentication processing are performed, and IP-based communication between terminals becomes possible (FIG. 10
(C)).

[0005] Next, how an IP packet is transmitted between terminals will be described. FIG. 11 is a diagram illustrating a packet transmission procedure. When transmitting a packet, the IP
Packets are sent from a layer to a lower layer. At this time, identification information called a unique header is added in each layer while passing through each layer, and finally transmitted from the PHS layer to the communication network, Is sent to the terminal.

[0006] When a packet is received, a process opposite to the transmission process is performed. First, the PHS layer receives a packet from the other party, and thereafter, the packet is transmitted to a higher layer. At this time, the header information used in each layer while passing through each layer is removed, and finally the IP layer
A packet to which only the header is added arrives.

[0007] Here, when data communication is performed between terminals using the PPP protocol, there is a disadvantage that the header of the PPP is added to the communication data, thereby deteriorating the throughput of the transmission path. As a method for improving the disadvantage, a method described in Japanese Patent Application Laid-Open No. 10-229416 has been proposed. In this system, an ID for connection is defined in common between devices connected in a point-to-point manner instead of a PPP header, and communication is performed using the ID.

[0008]

However, the method disclosed in the above publication is a solution in the case of handling a plurality of point-to-point connections, and is based on the assumption that only one-to-one connection is performed. In addition, there is no need to add even the header information proposed in the publication.

Here, PPP (Point to Point Protocol)
The ol) protocol is an Internet standard protocol for relaying various LAN protocols including IP over a point-to-point line, and provides the following functions. 1. 1. Reliable transmission of packets 2. Data encapsulation and non-encapsulation 3. Authentication of connected terminal IP address resolution to enable IP-based communication over point-to-point lines

However, the above-mentioned 1. And 2. Is a function provided in the PIAFS layer as well, And 4. If this function can be performed by another layer, there is no need to provide a PPP layer to perform communication.
An object of the present invention is to perform IP-based communication over a point-to-point line without using PPP.

[0011]

In order to achieve the above-mentioned object, the present invention provides a communication system which exchanges information during connection processing of a PPP layer.
The PHS layer acquires and processes P-address assignment information and terminal authentication information, thereby eliminating the processing of the PPP layer.

According to the first aspect of the present invention, a data communication apparatus for performing IP (Internet Protocol) based communication using a point-to-point line is provided by establishing and disconnecting a communication line between terminals, and by using the communication line. A line control unit for performing communication, and establishment and release of a data transmission method for transmitting data using the communication line established by the line control unit, and data transmission control for performing data communication using the data transmission method And a PP so that IP-based communication can be performed on a data communication path provided by the data transmission control unit.
Connection and disconnection of P (Point to Point Protocol) and
It comprises a PPP control unit that performs IP-based communication with the IP layer, and a connection control unit that monitors data at the time of PPP connection and controls the line control unit and the PPP control unit.

According to a second aspect of the present invention, in the data communication apparatus according to the first aspect, the line control unit includes a PHS (RCR
When a call is made using the STD28 standard, a Us Information of a User Information message which is a PHS call connection message is used.
The er User information element is added with IP address information and terminal authentication information.

According to a third aspect of the present invention, when the line control unit in the data communication apparatus according to the first aspect receives a call using the PHS, the line control unit transmits a PHS call connection message.
I in the User information element of the Information message
A flag for using the P address is added.

According to a fourth aspect of the present invention, when a call is received by using a PHS to the line control unit in the data communication apparatus according to the first aspect, the user is a PHS call connection message.
I in the User information element of the Information message
A means is provided for checking whether there is a flag for using the P address and extracting the flag.

According to a fifth aspect of the present invention, when a call is received using a PHS to the connection control unit in the data communication device according to the first aspect, the connection control unit is a PHS call connection message.
I in the User information element of the Information message
A means is provided for checking and extracting whether there is P address information and terminal authentication information.

According to a sixth aspect of the present invention, there is provided the data communication apparatus according to the fifth aspect, wherein the connection control unit includes a User U of a User Information message which is a PHS call connection message.
When the IP address information and the terminal authentication information are included in the ser information element, the setting of the IP address and the authentication processing of the calling terminal are performed.

According to a seventh aspect of the present invention, in the data communication device according to the fourth or fifth aspect, the connection control unit transmits the User Information message which is a PHS call connection message.
When the information for using the IP address is included in the UserUser information element, an instruction to omit the PPP connection processing is issued to the PPP connection control unit.

According to an eighth aspect of the present invention, the PPP control unit in the data communication device according to the first aspect suspends the PPP connection / disconnection processing by an instruction to omit the PPP connection processing of the connection control unit, The data from the IP layer is transferred to a data transmission control unit.

According to a ninth aspect of the present invention, in the data communication device according to the fourth or fifth aspect, the line control unit includes a user interface.
The format of the information added to the User information element of the ormation message is an original format.

According to a tenth aspect of the present invention, there is provided a computer-readable storage medium storing a program for causing a computer to function as the communication control device according to any one of the first to ninth aspects.

[0022]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The data communication apparatus of the present invention can omit the PPP connection processing at the time of connection, and thus can simplify the connection procedure. Further, at the time of data communication, since the header of the PPP can be omitted, the throughput at the time of communication can be improved.

An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing a basic configuration of a data communication device according to the present invention. The present invention relates to a communication device that performs IP (Internet Protocol) -based communication using a point-to-point line, and has a function of establishing and disconnecting a communication line between terminals and performing communication using the communication line. The line control unit 1 provided to the data transmission control unit 2, the establishment and release of a data transmission method for transmitting data using the communication path established by the line control unit 1, and the use of the data communication method PPP function for communication
(Point to Point Protocol) Data transmission control unit 2 provided to control unit 3, connection and disconnection of PPP so that IP-based communication can be performed on a data communication path provided by data transmission control unit 2, and connection to IP layer It comprises a PPP control unit 3 that provides a function of performing IP-based communication, and a connection control unit 4 that monitors data during connection and controls the line control unit 1 and the PPP control unit 3. Then, the line control unit 1 is connected to the dial-up line, and the PPP control unit 3
Are connected to the IP layer.

In the connection processing for performing IP-based communication using the PHS, connections are established for each layer in order from the lower layer to the upper layer as shown in FIG. FIG. 2 is a flowchart showing a procedure of a connection process of the data communication device of the present invention. First, a PHS line is connected (step S21). At this time, if each terminal has the data communication device of the present invention, the IP
Assign addresses and authenticate terminals. By doing so, it becomes possible to omit the subsequent PPP connection processing. When one of the terminals is a terminal that does not have the data communication device, only a normal PHS line connection is performed. Next, PIAFS is connected (step S2).
2). Then, it is determined whether the IP address has been assigned and the terminal has been authenticated (step S23).
If the IP address assignment and the terminal authentication processing have already been performed, the connection processing is completed. If the connection has not been performed, a PPP connection process is performed (step S2).
4) Complete the connection.

Here, the process of connecting the PHS line in step S21 will be described in detail. In the present invention, PHS
The connection processing of the PPP can be omitted by performing the IP address assignment and the authentication processing using the call connection performed at the time of the line connection. FIG. 3 is a sequence diagram of a call connection message exchanged between terminals at the time of call connection. First,
A Setup message is transmitted from the calling side to the called side. The callee receiving this message must use the Call Pro
Responds with ceeding, Alert, and Connect messages.
When the calling terminal receives the nect message, the connection of the PHS line is established (step S31).

In the present invention, after the connection of the PHS line is completed, one of the call connection messages, User Informati
The IP address assignment information and the terminal authentication information are transferred between the terminals using the on message (step S3).
2). By doing so, without connecting PPP, IP
Enables base-based communication.

FIGS. 4 and 5 are flow charts showing the procedure of IP address assignment and terminal authentication processing according to the present invention. FIG. 4 shows the calling side and FIG. 5 shows the called side. Hereinafter, this processing procedure will be described with reference to these drawings.
At the time of calling, when the call connection is completed, the connection control unit 4 instructs the line control unit 1 to send the User Information message User Use.
An instruction is given to add the IP address assignment information and the terminal authentication information to the information element and transmit the information element (step S4).
1). Next, the line controller 1 transmits the User Information message with the IP address information and the authentication information added thereto, and requests the called terminal to allocate the IP address and perform the authentication process (step S42).

FIG. 6 shows Us of the User Information message.
3 shows the format of IP address information and terminal authentication information added to the er User information element. Here, the IP address of the terminal itself is added to the IP information as an unsigned integer of 4 bytes. The user ID and password are added using 16-byte and 8-byte ASCII codes.

Upon receiving the User Information message, the connection control unit 4 of the called terminal sets the UserUser information element to IP
It is confirmed whether the address information and the authentication information of the terminal are added (steps S51, S52). If it is added, information is obtained (step S53).
Confirm P address and authenticate terminal (step S
54, S55). If the confirmation of the IP address and the authentication of the terminal are successful, the user
The user instruction element of the ormation message is instructed to add a flag indicating that the processing has succeeded (step S56), and the PPP control unit 3 is in the PPP state.
Is instructed not to perform the connection process (step S5).
7).

Next, User Infor
instruction to send the mation message (step S5
8). Here, the line control unit 1 sets a flag indicating that the result of the assignment of the IP address and the authentication of the terminal has been successful to Us.
By transmitting the message by adding it to the UserUser information element of the er Information message, it reports to the calling side that the assignment of the IP address and the authentication result of the terminal have been successful.

FIG. 7 shows the User Information message User
Indicates the format of the authentication result flag to be added to the User information element. Here, as the flag information, “IPOK” is inserted into four bytes using an ASCII code.

When the calling terminal receives the User Information message (step S43), it checks whether the User User information element includes a flag indicating that IP address assignment and terminal authentication were successful. (Step S44) If included, instruct the PPP layer not to make a connection (Step S4).
5). If the User Information message is not received, the connection of the PIAFS layer is performed next, and when the connection of the PIAFS layer ends, the connection of the PPP layer is performed. By doing so, communication between terminals that do not include the data communication device is also enabled. Thus, the connection process of the PHS line is completed.

Next, a packet transmission method for performing data transmission will be described. When performing IP-based data communication using PPP, as shown in FIG. 11, a header is added to a packet in each layer, and the packet is transmitted to a partner terminal. FIG. 8 is a diagram illustrating a data transmission method when the PPP layer is not used. Here, PPP
Since the layer is not used, the packet received from the IP layer is transferred to the PIAFS layer as it is. Therefore, no PPP header is added. IP packet assembly and disassembly,
And reliable transmission utilizes the function of the PIAFS layer.

At the time of reception, the packet received from the communication line is transmitted from the lower layer to the IP layer while deleting the header in each layer, contrary to the transmission. At this time, when passing through the PPP layer, since the header of the PPP is not added, the processing of the header is not performed, and the packet sent from the PIAFS layer is directly transferred to the IP layer.

[0035]

As described above, according to the present invention,
At the time of connection, PPP connection processing can be omitted, so that the connection procedure can be simplified and the time required for connection can be reduced. Also, since the PPP header can be omitted during data communication, it is possible to improve the throughput during communication and to increase the utilization efficiency of the communication line.

[Brief description of the drawings]

FIG. 1 is a block diagram of a basic configuration of a data communication device according to the present invention.

FIG. 2 is a flowchart showing a connection procedure of the data communication device of the present invention.

FIG. 3 is a sequence diagram of a call connection message exchanged during call connection.

FIG. 4 is a flowchart illustrating a procedure of a caller-side IP address assignment and terminal authentication process.

FIG. 5 is a flowchart illustrating a procedure of assigning an IP address of a called side and a terminal authentication process.

FIG. 6 is a diagram showing a format of IP address information and terminal authentication information to be assigned to a User information element.

FIG. 7 is a diagram showing the assignment of an IP address to be assigned to a User information element and the format of an authentication result flag.

FIG. 8 is a diagram illustrating a data transmission method when a PPP layer is not used.

FIG. 9 is a diagram illustrating a protocol stack when performing IP-based data communication using a PHS.

FIG. 10 is a diagram showing the order of connection of protocol stacks.

FIG. 11 is a diagram showing a packet transmission procedure.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Line control part, 2 ... Data transmission control part, 3 ... PPP control part, 4 ... Connection control part.

 ──────────────────────────────────────────────────続 き Continuing on the front page F term (reference) 5K030 GA03 GA15 HA08 HC09 JL01 JT02 JT09 LB01 LB17 LD20 5K034 AA01 DD03 EE03 EE12 JJ23 KK21 KK27 LL01 5K067 AA21 BB04 BB21 CC06 DD13 DD23 GG01 5K101 9LL06 BB02 CC07 JJ12 JJ25 KK56 LL01 LL09

Claims (10)

[Claims] 1. An IP using a point-to-point line
A communication device that performs communication based on (Internet Protocol), establishes and disconnects a communication line between terminals, and performs communication using the communication line, and a communication line established by the line control unit. A data transmission control unit for establishing and releasing a data transmission method for transmitting data, and performing data communication using the data transmission method, and an IP-based communication system provided on the data communication path provided by the data transmission control unit. PPP (Point to Poi)
Protocol) connection, disconnection, and I
A data communication apparatus, comprising: a PPP control unit that performs P-based communication; and a connection control unit that monitors data at the time of PPP connection and controls the line control unit and the PPP control unit. 2. The method according to claim 1, wherein the line control unit is a PHS (RCRST).
When making a call using the D28 standard), the User U of the User Information message which is a PHS call connection message
2. The data communication device according to claim 1, wherein information of the IP address and authentication information of the terminal are added to the ser information element. 3. When the line control unit receives a call using a PHS, the line control unit transmits a User Inf which is a PHS call connection message.
The data communication device according to claim 1, wherein a flag for using an IP address is added to a User User information element of the ormation message. 4. When the line control unit receives a call using a PHS, the line control unit transmits a User Inf which is a PHS call connection message.
2. The data communication apparatus according to claim 1, further comprising means for checking and extracting whether or not a flag for using an IP address is included in the User information element of the ormation message. 5. When the connection control unit receives a call using PHS, the connection control unit transmits a User Inf which is a PHS call connection message.
2. The data communication device according to claim 1, further comprising means for checking and extracting whether the IP address information and the authentication information of the terminal are included in the User information element of the ormation message. 6. The method according to claim 1, wherein the connection control unit is configured to transmit a User Information message of a PHS call connection message.
6. The data communication apparatus according to claim 5, wherein when the information element includes the IP address information and the authentication information of the terminal, the setting of the IP address and the authentication processing of the calling terminal are performed. . 7. The method according to claim 7, wherein the connection control unit is configured to transmit a User Information message of a PHS call connection message.
If information for using the IP address is included in the information element, P
6. The data communication apparatus according to claim 4, wherein an instruction to omit the PP connection processing is issued. 8. The method according to claim 1, wherein the PPP control unit stops PPP connection / disconnection processing and transfers data from the IP layer to a data transmission control unit according to an instruction of the connection control unit. A data communication device according to claim 1. 9. The method according to claim 1, wherein the line control unit is configured to transmit a User Information message of a PHS call connection message.
6. The data communication device according to claim 4, wherein a format of information added to the information element is a unique format. 10. A computer-readable storage medium in which a program for causing a computer to function as the communication control device according to claim 1 is recorded.