JP2009044447A - Communication terminal and communication method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a communication terminal for performing data communications with a specific user on the other side and preventing him or her from accessing at all times without requiring a user to register his or her information in the communication terminal beforehand, and to provide a communication method. <P>SOLUTION: The communication terminal is provided with a call communication means for establishing a call with other terminal through an IP network, a data communication means for performing data communication in parallel with the call communication, and an other party information acquisition means for acquiring information of the other party being connected. Also, the communication terminal is provided with a control means for performing communications when call is established with other terminal when receiving a call request and a call request destination coincides with the information of the other party being connected, otherwise the call is rejected. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

The present invention relates to a communication terminal and a communication method for performing a voice call and data communication using an IP such as a personal computer, a FAX, and an IP phone.

In recent years, with the widespread use of broadband networks, the number of IP telephone users has increased rapidly. Therefore, in the case of providing security to an IP phone, an invention is known in which data communication is permitted when a caller ID notification is received by an IP phone and matches a number registered in advance in a memory in the terminal (for example, Patent Document 1).
JP 2004-194246 A

  However, although the conventional technique is secure in that data communication is performed by specifying the other party, there is a problem that the other party can access the terminal at any time. Also, in terms of UI, there is a problem that it is troublesome to register whether to allow communication with the other party.

INDUSTRIAL APPLICABILITY The present invention is a communication terminal that can specify a partner and perform data communication, and can always prevent the partner from accessing the partner without registering information on the partner in advance in the communication terminal. And providing a communication method.

The present invention includes a call means for making a call with another terminal through an IP network, a data communication means for performing data communication in parallel with the call, and a destination information acquisition means for acquiring destination information during a call or communication. Further, the present invention, when receiving a communication request, is in communication with another terminal, and if the communication request destination matches the other party information in the call, communicate, if not, It is a communication terminal which has a control means to refuse communication.

According to the present invention, information on the other party is automatically determined on the SIP protocol, and data communication is permitted only when a call is being made with the other party, so the user registers the information on the other party in advance. Thus, there is an effect that it is possible to always prevent the other party from accessing.

  The best mode for carrying out the invention is the following embodiment.

  FIG. 1 is a block diagram showing a configuration of a communication terminal 100 that is Embodiment 1 of the present invention.

  The communication terminal 100 includes a network I / F 1, a protocol analysis unit 2, a RAM 3, a display unit 4, a ROM 5, a CPU 6, and a bus 7.

  The network I / F 1 is connected to the IP network. The protocol analysis unit 2 analyzes various data that arrive via the network I / F 1. The RAM 3 stores an operation mode and the like. The display unit 4 notifies the user of various states of the communication terminal 100. The ROM 5 stores a control program to be described later.

  FIG. 2 is a diagram illustrating an example of an INVITE message in the SIP protocol.

  In communication terminal 100, the other party is specified in the From part of this message.

  FIG. 3 is a diagram showing a standard sequence when making a telephone call using the SIP protocol.

  First, the calling party sends the INVITE message. Upon receiving the INVITE message, the called party performs call processing from the other party, such as ringing the telephone bell, and also sends a provisional response Ringing to inform the caller that the call is in progress. Here, the contents of the INVITE message are analyzed, and the analyzed partner information is stored in the RAM 3.

  Next, when the called party goes off-hook (pick up the handset), a successful OK is transmitted to the calling party, and the calling party sends an ACK response (session establishment) based on the OK from the called party. (OK) is transmitted, and a session is created between the calling party and the called party. Voice data is exchanged on the generated session, and a call state is established.

  Next, an operation for generating an error in data communication in the first embodiment will be described.

  FIG. 4 is a diagram illustrating an operation example for generating an error in data communication.

  First, the other party requests data communication. In response to this request, the INVITE message is analyzed on the side receiving the data communication request (self terminal side), and if the call state with the other party described in FIG. 3 is not established, a Not Acceptable message is transmitted. Then, an error is sent out. The first embodiment is based on data communication based on the SIP protocol. However, as long as the data communication protocol is a protocol that can know the IP of the other party, such as FTP or HTTP, a protocol other than SIP may be used. Good.

  Next, the operation when starting data communication in the first embodiment will be described.

  FIG. 5 is a flowchart showing an operation when starting data communication.

  In S1, it is monitored whether there is a data communication request. If it is determined that there is a data communication request, it is determined whether a call is currently being made with another terminal (S2). If the call is not in progress, data communication is rejected according to the protocol described in FIG. 3 (S5).

  Further, if it is determined in S3 that the IP address of the other party that is calling matches the other party IP that issued the communication request based on the other party information described in the description of FIG. Is permitted (S4). Here, if the IP address of the call partner does not match the IP address of the data communication request destination, the data communication is rejected in S5.

  Next, the operation when data communication is terminated in the first embodiment will be described.

  FIG. 6 is a flowchart illustrating an operation when ending data communication in the first embodiment.

  It is determined whether data communication is in progress (S11). If data communication is in progress, a request to end data communication from the other party or yourself is made (S12), and data communication is immediately ended (S15). However, if the call is terminated first in a state where the data communication is continued (S13), the data communication is not immediately terminated and the data communication is continued for a certain period of time (S14). Here, if the predetermined time continues, a data communication disconnection process is performed (S15).

  In an IP phone to which a function capable of communicating photographs, audio data, and the like is added, it is considered that data communication is often performed while talking. In preparation for this case, in the first embodiment, when a communication request is received, if a call is in progress with another terminal and the communication request destination matches the other party information during the call, communication is performed. If not, it refuses communication.

  That is, in the above embodiment, a call means for making a call with another terminal through the IP network, a data communication means for performing data communication in parallel with the call, and a destination information acquisition means for acquiring destination information during a call or communication. Have. In the above embodiment, when a communication request is received, if a call is being made with another terminal and the communication request destination matches the other party information in the call, communication is performed. It is an example of the communication terminal which has a control means to refuse communication.

  In this case, data communication is continued for a certain time after the call with the other party is disconnected.

  Moreover, when performing the said data communication, it operate | moves as a server.

And the said Example can be grasped | ascertained as invention of a method. That is, in the above-described embodiment, a call process for making a call with another terminal through the IP network, a data communication process for performing data communication in parallel with the call, and a caller or other party information that is being communicated is acquired and stored in the storage device. A prior information acquisition step. In the above embodiment, when a communication request is received, if a call is being made with another terminal and the communication request destination matches the other party information in the call, communication is performed. It is an example of the communication method which has a control process which refuses communication.

It is a block diagram which shows the structure of the communication terminal 100 which is Example 1 of this invention. It is a figure which shows the example of the INVITE message in a SIP protocol. It is a figure which shows the standard sequence at the time of making a telephone call by a SIP protocol. It is a figure which shows the operation example for generating an error at the time of data communication. It is a flowchart which shows the operation | movement at the time of starting data communication. 6 is a flowchart illustrating an operation when data communication is terminated in the first embodiment.

Explanation of symbols

100 ... communication terminal,
1 ... Network I / F,
2 ... Protocol analysis part,
3 ... RAM,
4 ... display part,
5 ... ROM,
6 ... CPU.

Claims (4)

Calling means for calling with other terminals via the IP network;
Data communication means for performing data communication in parallel with a telephone call;
Partner information acquisition means for acquiring partner information during a call or communication;
Control means that, when receiving a communication request, communicates with another terminal and the communication request destination matches the other party information during the call, and if it does not match, control means for rejecting the communication When;
A communication terminal comprising: In claim 1,
A communication terminal characterized in that data communication is continued for a certain time after a call with a partner is disconnected. In claim 1,
A communication terminal that operates as a server when performing the data communication. A call process for making a call with another terminal through an IP network;
A data communication process for performing data communication in parallel with the telephone call;
A partner information acquisition step of acquiring partner information during a call or communication and storing the information in a storage device;
When receiving a communication request, a control step of communicating if a call is being made with another terminal and the communication request destination matches the other party information during the call, and if not, the control step of rejecting the communication When;
A communication method characterized by comprising:

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