Image communication device

• US 20060184676A1
• Filed: 12/20/2005
• Published: 08/17/2006
• Est. Priority Date: 02/16/2005
• Status: Abandoned Application

• Current Assignee: Murata Machinery Limited (Muratec)
• Original Assignee: Murata Machinery Limited (Muratec)
• Inventors: Tanimoto, Yoshifumi
• Application Number:
  US11/314,552
• Publication Number:
  US 20060184676A1
• Time in Patent Office: Days
• US Class Current: 709/227
• CPC Class Codes: H04L 65/1069 Session establishment or de-establishment
• CPC Class Codes: H04L 65/1104 Session initiation protocol [SIP]
• CPC Class Codes: H04N 1/00214 details of transmission
• CPC Class Codes: H04N 1/00217 only involving computer data transmission protocols, e.g. SMTP, WAP or HTTP communication protocol aspects and techniques in packet data networks H04L69/00; network-specific arrangements or communication protocols supporting networked applications H04L67/00
• CPC Class Codes: H04N 2201/0025 Adapting an image communication to a non-image communication or vice versa, e.g. data rate-conversion
• CPC Class Codes: H04N 2201/0093 Facsimile machine H04N2201/0094 takes precedence

Abstract

Even when an SIP server imposes a restriction on a description content of an SDP, an image communication device can freely define a content of a media session with another end without receiving the restriction. Even when the image communication device is connected to a carrier network set for a purpose of only a usage of voice communication, the image communication device can carry out communication of image data or transmission of a character string. An image communication device establishes a media session by exchanging a message of a call control protocol with a communication device of another end and transmits image data. The image communication device describes information relating to the media session to be requested to the communication device of the other end or a character string to be transmitted to the communication device of the other end in a field not interfered by a call control server.

Claims

1. An image communication device, comprising:

means for storing a Session Description Protocol (SDP) header format that conforms to a server of a carrier to which the image communication device is connected;

a first describing means for describing an SDP header of a request message to be transmitted in accordance with the SDP header format stored in the means for storing;

a second describing means for describing information relating to a media session to be requested to a communication device of another end in a prescribed area, not interfered by the server, in the request message;

means for establishing the media session by exchanging a message of a call control protocol with the communication device of the other end; and

means for transmitting image data to the communication device of the other end in accordance with the information relating to the media session in the media session established by the means for establishing.

2. The image communication device according to claim 1, wherein the prescribed area, where the second describing means describes the information relating to the media session, is a specific field of the Session Description Protocol (SDP) header described by the first describing means.

3. The image communication device according to claim 2, wherein the specific field is an s field of the Session Description Protocol (SDP) header.

4. The image communication device according to claim 1, wherein the information relating to the media session is a media type.

5. The image communication device according to claim 1, wherein the information relating to the media session is a port number.

6. An image communication device, comprising:

means for establishing a media session by exchanging a message of a call control protocol with a communication device of another end;

means for receiving image data on the media session established by the means for establishing; and

means for adopting information described in a prescribed area, not interfered by a server controlling a call control, in the received request message as information relating to the media session requested by the communication device of the other end.

7. The image communication device according to claim 6, wherein the prescribed area, not interfered by the server, is a specific field of a Session Description Protocol (SDP) header in the received request message.

8. The image communication device according to claim 7, wherein the specific field is an s field of the Session Description Protocol (SDP) header.

9. The image communication device according to claim 6, wherein the information relating to the media session is a media type.

10. The image communication device according to claim 6, wherein the information relating to the media session is a port number.

11. An image communication device, comprising:

means for establishing a media session by exchanging a message of a call control protocol with a communication device of another end;

means for transmitting image data in the established media session;

means for inputting any arbitrary character string;

means for describing the input character string in a prescribed area, not influencing the establishment of the media session, in a message requesting the establishment of the media session; and

means for transmitting the message including the character string to the communication device of the other end.

12. The image communication device according to claim 11, further comprising means for storing the character string described in the prescribed area as communication history information.

13. The image communication device according to claim 11, wherein the prescribed area is an s field of a Session Description Protocol (SDP) header.

14. An image communication device, comprising:

means for establishing a media session by exchanging a message of a call control protocol with a communication device of another end;

means for receiving image data in the established media session;

means for extracting a character string described in a prescribed area, not influencing the establishment of the media session, in a message requesting to establish the media session received from the other end; and

means for outputting the extracted character string.

15. The image communication device according to claim 14, further comprising means for storing the character string described in the prescribed area as communication history information.

16. The image communication device according to claim 14, wherein the prescribed area is an s field of a Session Description Protocol (SDP) header.