Method and apparatus by which a UE starts compression in SIP signalling to IMS

• US 20050086327A1
• Filed: 10/16/2003
• Published: 04/21/2005
• Est. Priority Date: 10/16/2003
• Status: Abandoned Application

• Current Assignee: Nokia Corporation
• Original Assignee: Nokia Corporation
• Inventors: Khartabil, Hisham, Mayer, Georg, Meskauskas, Paulius, Sugar, Robert
• Application Number:
  US10/687,533
• Publication Number:
  US 20050086327A1
• Time in Patent Office: Days
• US Class Current: 709/219
• CPC Class Codes: H04L 65/1016 IP multimedia subsystem [IMS]
• CPC Class Codes: H04L 65/1045 Proxies, e.g. for session initiation protocol [SIP]
• CPC Class Codes: H04L 65/1069 Session establishment or de-establishment
• CPC Class Codes: H04L 65/1104 Session initiation protocol [SIP]
• CPC Class Codes: H04L 69/04 Protocols for data compression, e.g. ROHC

Abstract

A method (and corresponding equipment) by which a UE device (10) begins compressing messages it transmits to an SIP outbound proxy server (12) as SIP signals, including: a step (22a) in which the UE device sends a request message (22a 32a 42a) to the SIP outbound proxy server (12); and a step (23 33 43) in which the UE device analyzes a response message (22b 32b 42b) received from the SIP outbound proxy server (12) in response to the request message (22a 32a 42a) to determine a compression parameter. The request message (22a) may be an options request message and the response message (22b) would then be e.g. a 200 OK message. Alternatively, the request message (32a) may be a register message, and the response message (32b) would then be e.g. a 401 (unauthorized) message. In another embodiment, the response message (42b) is any compressed message.

Claims

1. A method by which a UE device (10) begins compressing messages it transmits to an SIP outbound proxy server (12) as SIP signals, the method characterized by:

a step (22a) in which the UE device sends a request message (22a 32a 42a) to the SIP outbound proxy server (12); and

a step (23 33 43) in which the UE device analyzes a response message (22b 32b 42b) received from the SIP outbound proxy server (12) in response to the request message (22a 32a 42a) to determine a compression parameter for use in compressing messages it sends to the SIP outbound proxy server (12).

2. The method of claim 1, wherein the request message (22a) is an options request message and wherein the response message (22b) is a 200 OK message, and further wherein in the step (23) in which the UE device (10) analyzes the response message (22b), the UE device (10) parses the response message to obtain the compression parameter.

3. The method of claim 1, further characterized by:

a step (24) in which the UE device (10) alters an address for the SIP outbound proxy server (12) previously stored so as to include the stored address the compression parameter.

4. The method of claim 1, wherein the request message (32a) is a register message, and wherein the response message (32b) is a 401 (unauthorized) message.

5. The method of claim 1, wherein the response message (42b) is any compressed message.

11. A computer program product comprising:

a computer readable storage structure embodying computer program code thereon for execution by a computer processor in a UE device (10), with said computer program code characterized in that it includes instructions for performing the steps of the method of claim 1.

6. An apparatus used by a UE device (10) to begin compressing messages it transmits to an SIP outbound proxy server (12) as SIP signals, the apparatus characterized by:

means (22a) by which the UE device sends a request message (22a 32a 42a) to the SIP outbound proxy server (12);

means (23 33 43) by which the UE device analyzes a response message (22b 32b 42b) received from the SIP outbound proxy server (12) in response to the request message (22a 32a 42a) to determine a compression parameter for use in compressing messages it sends to the SIP outbound proxy server (12).

7. The apparatus of claim 6, wherein the request message (22a) is an options request message and wherein the response message (22b) is a 200 OK message, and further wherein the means (23) by which the UE device (10) analyzes the response message (22b) includes means by which the UE device (10) parses the response message to obtain the compression parameter.

8. The apparatus of claim 6, further characterized by:

means (24) by which the UE device (10) alters an address for the SIP outbound proxy server (12) previously stored so as to include the stored address the compression parameter.

9. The apparatus of claim 6, wherein the request message (32a) is a register message, and wherein the response message (32b) is a 401 (unauthorized) message.

10. The apparatus of claim 6, wherein the response message (42b) is any compressed message.