Resolution of IP addresses associated with a telephone number utilizing query flags

• US 7,796,578 B2
• Filed: 10/04/2005
• Issued: 09/14/2010
• Est. Priority Date: 10/05/2005
• Status: Expired due to Fees

• Current Assignee: Cingular Wireless II LLC (AT&T, Inc.)
• Original Assignee: Cingular Wireless II LLC (AT&T, Inc.)
• Inventors: Stafford, Matthew Wayne
• Primary Examiner(s): Matar; Ahmad F
• Assistant Examiner(s): SHAH, ANTIM G
• Application Number:
  US11/243,217
• Publication Number:
  US 20070116250A1
• Time in Patent Office: 1,806 Days
• Field of Search: 370/352, 370/351, 379/88.17, 379/220.01, 709/203
• US Class Current: 370/351
• CPC Class Codes: H04L 61/4511 using domain name system [DNS]
• CPC Class Codes: H04L 61/4557 Directories for hybrid networks, e.g. including telephone numbers
• CPC Class Codes: H04M 7/0075 Details of addressing, directories or routing tables
• CPC Class Codes: H04M 7/128 Details of addressing, directories or routing tables

Abstract

Queries for IP addresses associated with a telephone number are conducted in accordance with query flags contained with an ENUM record. A query flag indicates the type of query to be initiated against the DNS databases. The query flag provides a means for interpreting the domain name portion of the URI contained in the ENUM record. Query flags provide an explicit indication as to the type of query to be performed against the DNS and provide an explicit indication as to how the domain name portion of a URI in an ENUM record should be interpreted. Query flags also provide guidance pertaining to subsequent actions to be performed. The use of query flags eliminates ambiguities associated with making assumptions about the domain name contained in an ENUM record. Thus, the use of query flags can reduce latency, reduce the load on transmission links, and reduce processing load on network elements.

Claims

1. A method for obtaining an Internet Protocol (IP) address associated with a telephone number, said method comprising:

creating an Electronic Number (ENUM) record comprising;

a first portion indicative of said telephone number;

a second portion indicative of a domain name associated with said telephone number; and

a query flag indicative of a respective query type to be initiated against a domain name system (DNS), the query type including a query for mail exchange resource records, and a query flag indicative of initiating the query for mail exchange resource records being unique to the query for mail exchange resource records as compared to a query flag indicative of another respective query type; and

querying said DNS with said ENUM record to obtain at least one IP address associated with said telephone number.

2. The method of claim 1, wherein said query type to be initiated further includes

a query for server resource records.

3. The method of claim 1, wherein:

the query flag indicative of initiating the query for mail exchange resource records having a value of “

m”

; and

a query flag having a value of “

g”

is indicative of initiating a query for server resource records.

4. The method of claim 1, further comprising:

obtaining said at least one IP address via a wireless communications network.

5. A system for obtaining an Internet Protocol (IP) address associated with a telephone number, said system comprising:

a first processor for;

receiving said telephone number;

creating a query for a domain name associated with said telephone number,

wherein said query comprises an indication of said telephone number; and

providing said query to a second processor;

said second processor for;

creating an Electronic Number (ENUM) record in response to receiving said query, said ENUM record comprising;

a first portion indicative of said telephone number;

a second portion indicative of a domain name associated with said telephone number; and

a query flag indicative of a respective query type to be initiated against a domain name system (DNS), the query type including a query for mail exchange resource records, and a query flag indicative of initiating the query for mail exchange resource records being unique to the query for mail exchange resource records as compared to a query flag indicative of another respective query type.

6. The system of claim 5, wherein said query type to be initiated further includes

a query for server resource records.

7. The system of claim 5, wherein:

the query flag indicative of initiating the query for mail exchange resource records having a value of “

m”

; and

a query flag having a value of “

g”

is indicative of initiating a query for server resource records.

8. The system of claim 5, wherein said system is part of a wireless communications network.

9. A computer-readable tangible storage medium having computer-executable instructions stored thereon, the instructions when executed by a computer causing the computer to implement a method to create a data structure, said method comprising:

creating an Electronic Number (ENUM) record comprising;

a first portion indicative of said telephone number;

a second portion indicative of a domain name associated with said telephone number; and

a query flag indicative of a respective query type to be initiated against a domain name system (DNS), the query type including a query for mail exchange resource records, and a query flag indicative of initiating the query for mail exchange resource records being unique to the query for mail exchange resource records as compared to a query flag indicative of another respective query type.

10. The computer-readable tangible storage medium of claim 9, wherein said query type to be initiated further includes

a query for server resource records.

11. The computer-readable tangible storage medium of claim 9, wherein:

the query flag indicative of initiating the query for mail exchange resource records having a value of “

m”

; and

a query flag having a value of “

g”

is indicative of initiating a query for server resource records.

12. The computer-readable tangible storage medium of claim 9, the method further including:

creating said ENUM record; and

querying said DNS with said ENUM record to obtain at least one IP address associated with said telephone number.

13. The computer-readable tangible storage medium of claim 12, the method further including obtaining said at least one IP address via a wireless communications network.