Method for supporting session mobility

• US RE44,169 E1
• Filed: 08/02/2011
• Issued: 04/23/2013
• Est. Priority Date: 12/14/2004
• Status: Expired due to Fees

• Current Assignee: Electronics and Telecommunications Research Institute
• Original Assignee: Electronics and Telecommunications Research Institute
• Inventors: Park, Hyun-Seo, Rhee, Je-Hun, Kim, Kyung-Sook, Kang, Sook-Yang, Bahg, Young-Jick, Shin, Gyung-Chul
• Primary Examiner(s): Zhou, Yong
• Application Number:
  US13/196,515
• Time in Patent Office: 630 Days
• Field of Search: None
• US Class Current: 370/270
• CPC Class Codes: H04L 29/06027 Protocols for multimedia communication
• CPC Class Codes: H04L 65/1006 SIP
• CPC Class Codes: H04L 67/14 Session management for real-time applications in data packet communications networks H04L65/1066
• CPC Class Codes: H04L 67/146 Markers for unambiguous identification of a particular session, e.g. session cookie or URL-encoding

Abstract

A method for supporting session mobility, more particularly, a method for supporting session mobility that can move various sessions between two or more devices by using session initiation protocol (SIP). Various sessions can be simultaneously moved by utilizing a SIP PUBLISH message. Accordingly, a user can utilize various services as they are regardless of changing of service receiving device while the user utilizes various services. Also, the session mobility can be effectively supported whether the target of the session movement is known or not.

Claims

1. A method for supporting session mobility from a first device having respective sessions connected with at least one service device to a second device, comprising:

a) determining whether an address of the second device is defined by the first device when the session movement begins from the first device;

b) at a), transferring session information including data for supporting session mobility from the first device to the second device when the address of the second device is defined clearly by the first device, and transferring the session information data from the first device to the session management server when the address of the second device is not defined clearly;

at b), when the session data is transferred to the session management server, c) storing the session data and the user identification of the a received SIP PUBLISH message at the session management server;

d) transferring a SIP SUBSCRIBE message including the user identification from the second device to the session management server;

e) transferring the session data having the same user identification as the user identification included in the SIP SUBSCRIBE message from the session management server to the second device through a SIP NOTIFY message;

f) generating a SIP session establishment message from the second device and transferring the SIP session establishment message to the predetermined service device by utilizing the received SIP NOTIFY message; and

g) establishing new sessions between the service device and the second device by utilizing the received SIP session establishment message.

2. The method for supporting session mobility of claim 1, wherein the session data is transferred by utilizing a SIP PUBLISH message.

3. The method for supporting session mobility of claim 1, further comprising:

at b), when the session data is transferred to the second device, c) generating an SIP session establishment message from the second device by using the received session data, and transferring the SIP session establishment message from the second device to a predetermined service device; and

d) establishing new sessions between the service device and the second device by utilizing the received SIP session establishment message.

4. The method for supporting session mobility of claim 3, further comprising:

after d), e) terminating the previously established sessions between the service device and the first device by utilizing the received SIP session establishment message.

5. The method for supporting session mobility of claim 4, further comprising:

after e), f) publishing a result of a session movement from the first device to the second device through a SIP PUBLISH message.

6. The method for supporting session mobility of claim 1, further comprising:

after g), h) terminating the previously established sessions between the service device and the first device by utilizing the received SIP session establishment message.

7. The method for supporting session mobility of claim 6, further comprising:

after h), i) publishing a result of the session movement from the first device to the session management server through a SIP PUBLISH message.

8. The method for supporting session mobility of claim 7, further comprising:

after i), j) notifying a result of the session movement from the session management server to the second device through the SIP NOTIFY message.

9. The method for supporting session mobility of claim 1, wherein the session data includes data needed to establish new session, including at least one of addresses of two peers of the session, a session ID of the session, a cookie, and other session specific information.

10. The method for supporting session mobility of claim 2, wherein the session data is generated for each session, and the SIP PUBLISH message includes at least one session data.

11. A method for supporting session mobility from a first device to a second device, comprising:

receiving at least one of a Session Initiation Protocol (SIP) PUBLISH message and a SIP SUBSCRIBE message from at least one of the first device and the second device;

extracting a session data and a user identification from the SIP PUBLISH message;

storing the session data and the first user identification;

searching the session data corresponding to a second user identification included in the SIP SUBSCRIBE message;

generating a SIP NOTIFY message incorporating the searched session data corresponding to the second user identification; and

transferring the generated SIP NOTIFY message to a sender of the SIP SUBSCRIBE message.

12. The method for supporting session mobility of claim 11, further comprising classifying the received SIP messages according to user identifications included in the received SIP messages.

13. A system for supporting session mobility from a first device to a second device, comprising:

a reception processing module configured to receive at least one of a Session Initiation Protocol (SIP) PUBLISH message and a SIP SUBSCRIBE message from at least one of the first device and the second device;

a session mobility controlling module configured to extract a session data and a user identification from the SIP PUBLISH message;

a management module configured to store the session data and the first user identification;

wherein when the SIP SUBSCRIBE message including the second user identification is received, the management module is further configured to;

search the session data corresponding to the second user identification, and

generate a SIP NOTIFY message incorporating the corresponding session data; and

a message transferring module configured to transfer the generated SIP NOTIFY message to a sender of the SIP SUBSCRIBE message.

14. The system for supporting session mobility of claim 13, wherein the reception processing module is further configured to classify the received SIP messages according to the user identifications included in the received SIP messages.