SOLUTION FOR THE RESOLUTION OF FLEXIBLE ADDRESS SCHEMES FOR IMS SERVICES

• US 20080101358A1
• Filed: 10/24/2007
• Published: 05/01/2008
• Est. Priority Date: 10/31/2006
• Status: Abandoned Application

• Current Assignee: Alcatel-Lucent SA (Nokia Corporation)
• Original Assignee: Alcatel-Lucent SA (Nokia Corporation)
• Inventors: VAN EWIJK, Adrianus Johannes, DE VRIENDT, Johan Andre
• Application Number:
  US11/923,540
• Publication Number:
  US 20080101358A1
• Time in Patent Office: Days
• US Class Current: 370/389
• CPC Class Codes: H04L 61/4552 Lookup mechanisms between a plurality of directories; Synchronisation of directories, e.g. metadirectories
• CPC Class Codes: H04L 65/1016 IP multimedia subsystem [IMS]

Abstract

To resolve a Uniform Resource Identifier (URI) for use in routing messages in or between IP Multimedia Subsystem (IMS) networks, a query (101;201) is sent to resolve this URI from a device (120;220) to a private name server (121;221). The private name server (121;221) attempts to resolve the URI. In case of failure the method further involves the sending of a new query (104;203) for resolving the URI to a public name server (122;222). The public name server (122;222) resolves the URI in the new query (104;203).

Claims

1. A method for resolving a Uniform Resource Identifier (URI) for use in routing messages in or between IP Multimedia Subsystem (IMS) networks comprising the following steps:

a. sending a query (101;

201) for resolving said Uniform Resource Identifier from a device capable of sending messages to said IP Multimedia Subsystem networks (1 20;

220), to a private name server (121 ;

221); and

b. resolving (102;

202) said Uniform Resource Identifier by said private name server (121 ;

221);

characterized in that said method further comprises;

c. sending a new query (104;

203) for resolving said Uniform Resource Identifier to a public name server (122;

222) in case resolving said Uniform Resource Identifier by said private name server (121 ;

221) fails;

d. resolving (105;

204) said Uniform Resource Identifier by said public name server (1 22;

222); and

e. receiving a response (106;

205) to said query (104;

203) by said device (120;

220).

2. A method for resolving a Uniform Resource Identifier (URI) as described in claim 1, characterized in that said step c of sending said new query (104;

203) is performed by said device (120;

220).

3. A method for resolving a Uniform Resource Identifier (URI) as described in claim 1, characterized in that said step c of sending said new query (104;

203) is performed by said private name server (121;

221).

4. A method for resolving a Uniform Resource Identifier (URI) as described in claim 1, characterized in that said step d involves translating a domain in said Uniform Resource Identifier into a different domain using Naming Authority Pointer (NAPTR) records.

5. A method for resolving a Uniform Resource Identifier (URI) as described in claim 1, characterized in that said step d involves translating a domain in said Uniform Resource Identifier into a different domain using Service (SRV) records.

6. A device (120) for routing messages in an IP Multimedia Subsystem network, said device (120) comprising:

means able to formulate a query (101) for resolving (102) a Uniform Resource Identifier (URI);

means for sending said query (101) to a private name server (121); and

means for interpreting a response (103) to said query (101);

characterized in that said device (120) is further adapted to formulate a new query (104) for resolving (105) said Uniform Resource Identifier (URI) and to send said new query (104) to a public name server (122) in case a response (103) from said private name server indicates a failure to resolve (102) said Uniform Resource Identifier (URI) by said private name server (121).

7. A private name server (221) for resolving (202) a Uniform Resource Identifier (URI) for use in routing messages in a IP Multimedia Subsystem network, said private name server (221) comprising:

means for receiving a query (201) for resolving (202) a Uniform Resource Identifier (URI);

means for resolving (202) said Uniform Resource Identifier (URI);

means for formulating a response (207) to said query (201); and

means for sending said response (207);

characterized in that said private name server (221) is further adapted to formulate a new query (203) for resolving (204) said Uniform Resource Identifier (URI) and to send said new query (203) to a public name server (222) in case of failure to resolve (202) said Uniform Resource Identifier (URI) by said private name server (222).