JP5096831B2 - Communication apparatus and communication method - Google Patents

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.

It is an object of the present invention to provide a communication device and a communication method that are capable of rejecting a data communication request from a party other than the calling party and performing data communication with the calling party when making a call through the IP network. .

The communication apparatus according to the present invention includes a calling unit that performs a call with a partner via an IP network, a data communication unit that performs data communication with a partner via the IP network, and the data when performing a call using the calling unit. Determination means for determining whether or not the other party making a call by the call means matches the other party making the data communication request by the data communication means when there is a request for data communication by the communication means If the determination means determines that they match, the data communication is performed according to the data communication request by the data communication means, and if it does not match, the data communication request by the data communication means And a control means for controlling to refuse.

According to the present invention, when a call is made through the IP network, it is determined whether or not the other party who requested the data communication matches the other party, and if they match, the communication according to the request is performed. If they do not match, the data communication request is rejected, so that a data communication request from a party other than the calling party can be rejected and data communication with the calling party can be performed.

  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 receiving side goes off-hook (lifts the handset), a successful OK is transmitted to the calling side, and the calling side transmits an ACK response (session establishment) based on the OK from the called side. (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, an 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 or not data communication is in progress (S11). If data communication is in progress, a request to end data communication is made from the other party or yourself (S12), and data communication is immediately ended (S15). However, if the call is ended first in a state where the data communication is continued (S13), the data communication is not immediately ended 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 photos, 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.

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)

A calling means for making a call with the other party through the IP network ;
Data communication means for performing data communication with the other party through the IP network ;
When there is a request for data communication by the data communication means during a call by the call means, a request for data communication by the data communication means is made with the other party making a call by the call means. A determination means for determining whether or not the other party matches,
If it is determined by the determination means that the data communication means match, data communication is performed according to the data communication request by the data communication means. If it is determined that they do not match, the data communication means rejects the data communication request. Control means for controlling
A communication apparatus comprising: The determination means determines whether or not the other party making a call by the call means based on the information included in the SIP protocol INVITE message matches the other party making the data communication request by the data communication means. The communication apparatus according to claim 1, further comprising: The control means continues the data communication by the data communication means for a certain period of time when it is determined that the call by the call means has ended while performing the call by the call means and the data communication by the data communication means. 3. The communication device according to claim 1, wherein data communication by the data communication unit is terminated thereafter. A call process for making a call with the other party through the IP network ;
A data communication step of performing data communication with the other party through the IP network ;
When making a call in the call process, if there is a request for data communication in the data communication process, a request for data communication in the data communication process is made with the other party making a call in the call process. A determination step of determining whether or not the other party matches,
When it is determined by the determination step that data matches, data communication is performed according to the data communication request by the data communication step. When it is determined that they do not match, the data communication request by the data communication step is rejected. A control process for controlling
A communication method characterized by comprising:

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