COMMUNICATION TERMINAL THAT PERFORMS NETWORK PACKET COMMUNICATION USING SIP SERVERS, CONTROL METHOD FOR THE COMMUNICATION TERMINAL, AND STORAGE MEDIUM

• US 20120106542A1
• Filed: 06/21/2011
• Published: 05/03/2012
• Est. Priority Date: 07/06/2010
• Status: Active Grant

• Current Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Original Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Inventors: Inoue, Go
• Granted Patent: US 9,319,438 B2
• Time in Patent Office: Days
• US Class Current: 370/352
• CPC Class Codes: H04L 41/0806 for initial configuration or provisioning, e.g. plug-and-play
• CPC Class Codes: H04L 61/5014 using dynamic host configuration protocol [DHCP] or bootstrap protocol [BOOTP]
• CPC Class Codes: H04L 65/1046 Call controllers; Call servers
• CPC Class Codes: H04L 65/1059 End-user terminal functionalities specially adapted for real-time communication
• CPC Class Codes: H04L 65/1104 Session initiation protocol [SIP]
• CPC Class Codes: H04L 67/303 Terminal profiles

Abstract

A communication terminal that determines the types of SIP servers, and stores SIP server information in association with the determined types so that SIP communication can be normally performed. The communication terminal carries out network packet communication using the SIP servers. SIP server information on the SIP servers is acquired, and types of the SIP servers are determined based on the acquired SIP server information. The SIP server information is stored in association with the determined types of the SIP servers.

Claims

1. A communication terminal that carries out network packet communication using SIP servers, comprising:

an acquisition unit that acquires SIP server information on the SIP servers;

a determination unit that determines types of the SIP servers based on the SIP server information acquired by said acquisition unit; and

a storage unit that stores the SIP server information acquired by said acquisition unit in association with the types of the SIP servers determined by said determination unit.

2. A communication terminal as claimed in claim 1, wherein said acquisition unit uses DHCPv4 or DHCPv6 to acquire the SIP server information.

3. A communication terminal as claimed in claim 1, wherein said acquisition unit uses a multicast packet or a broadcast packet to acquire the SIP server information.

4. A communication terminal as claimed in claim 1, wherein the types of the SIP servers include at least one selected from the following:

an SIP registration server, an SIP proxy server, an SIP redirect server, and an SIP location server.

5. A communication terminal as claimed in claim 1, further comprising a user interface that enables a user to select the types of the SIP servers.

6. A communication terminal as claimed in claim 1, wherein said determination unit uses an SIP method, and determines the types of the SIP servers from a field of response data to the SIP method.

7. A communication terminal as claimed in claim 6, wherein said determination unit uses an OPTIONS method, and determines the types of the SIP servers from an Allow field of response data to the OPTIONS method.

8. A communication terminal as claimed in claim 6, wherein said determination unit uses a Register method, and determines the types of the SIP servers from a response code of response data to the Register method.

9. A communication terminal as claimed in claim 6, wherein said determination unit uses an Invite method, and determines the types of the SIP servers from a response code of response data to the Invite method.

10. A communication terminal as claimed in claim 1, further comprising a confirmation unit that enables a user to confirm the SIP server information for each type of the SIP servers.

11. A communication terminal as claimed in claim 1, wherein said acquisition unit automatically acquires the SIP server information when the communication terminal is started.

12. A communication terminal as claimed in claim 1, wherein said acquisition unit automatically acquires the SIP server information at regular time intervals set in advance by a user.

13. A control method for a communication terminal that carries out network packet communication using SIP servers, comprising:

an acquisition step of acquiring SIP server information on the SIP server;

a determination step of determining types of the SIP servers based on the SIP server information acquired in said acquisition step; and

a storage step of storing, in a storage unit, the SIP server information acquired in said acquisition step in association with the types of the SIP servers determined in said determination step.

14. A non-transitory computer-readable storage medium storing a program for causing a computer to implement a control method for a communication terminal as claimed in claim 13.