Systems and methods for providing service migration between first and second cellular technologies

• US 8,599,866 B2
• Filed: 08/28/2012
• Issued: 12/03/2013
• Est. Priority Date: 08/01/2003
• Status: Expired due to Fees

• Current Assignee: AT&T Mobility II LLC (AT&T, Inc.)
• Original Assignee: AT&T Mobility II LLC (AT&T, Inc.)
• Inventors: Tran, Nhan Thanh, Hamadi, Charles Jamile
• Primary Examiner(s): Choi, Eunsook
• Application Number:
  US13/597,199
• Publication Number:
  US 20130084876A1
• Time in Patent Office: 462 Days
• Field of Search: None
• US Class Current: 370/401
• CPC Class Codes: H04Q 3/005 Personal communication services, e.g. provisions for portability of subscriber numbers
• CPC Class Codes: H04W 40/02 Communication route or path selection, e.g. power-based or shortest path routing
• CPC Class Codes: H04W 8/28 Number portability ; Network address portability
• CPC Class Codes: H04W 92/02 Inter-networking arrangements

Abstract

Systems and methods for a call flow for a mobile directory number (MDN) from a first phone to a second phone which has been intra-service ported. The system includes: a first switch of a first technology; a second switch of a second technology; and a local number portability database (LNP). The LNP stores local routing numbers (LRN) associated with the MDN. The WLNP system determines whether a call, from the first phone, is received by a public switched telephone network (PSTN) or the first switch. If the call is received by the PSTN with the LRN, the call is routed to the second switch based on the LRN. If the call is received by the first switch without the LRN, the first switch queries the LNP for the LRN and the call is routed intra-carrier to the second switch.

Claims

1. A system, comprising:

a local number portability database; and

a second mobile switching center of a second technology system in communication with the local number portability database, the second mobile switching center performing functions including receiving, via an inter-machine trunk, a call from a first mobile switching center of a first technology system upon the first mobile switching center receiving a local routing number of the second mobile switching center from the local number portability database, the inter-machine trunk including data translation for translating data back and forth between the first mobile switching center and the second mobile switching center, the call being intended for a mobile directory number of a destination phone that has been intra-service ported from the first technology system to the second technology system,

wherein the first mobile switching center and the second mobile switching center reside within a mobile service carrier'"'"'s own system; and

wherein prior to receiving the location routing number from the local number portability database, the first mobile switching center queries a home location register of the first technology system and receives a negative return result, the negative return result including at least one of a mismatch or an unassigned directory number.

2. The system of claim 1, further comprising a public switched telephone network in communication with the first mobile switching center and the second mobile switching center.

3. The system of claim 2, wherein the public switched telephone network refers to an entire interconnected collection of local, long distance and international phone companies.

4. The system of claim 1, wherein the call is originated from a landline phone.

5. The system of claim 1, wherein the call is originated from a cellular phone.

6. The system of claim 1, wherein the first mobile switching center is a time division multiple access mobile switching center.

7. The system of claim 1, wherein the second mobile switching center is a general system for a mobile communications mobile switching center.

8. The system of claim 1, wherein the local number portability database includes a plurality of subscriber profiles.

9. The system of claim 8, wherein each one of the plurality of subscriber profiles retains a telephone number of a subscriber upon the subscriber switching between service carriers.

10. A method, comprising:

receiving a call at a second mobile switching center of a second technology system from a first mobile switching center of a first technology system upon the first mobile switching center receiving a location routing number of the second mobile switching center from a local number portability database, the reception of the call being enabled using an inter-machine trunk, the inter-machine trunk including data translation for translating data back and forth between the first mobile switching center and the second mobile switching center, the call being intended for a mobile directory number of a destination phone that has been intra-service ported from the first technology system to the second technology system; and

querying a home location registry of the second technology system, using the second mobile switching center, to verify and retrieve a record of a recipient of the call, the home location registry of the second technology system determining an account associated with the mobile directory number of the destination phone;

wherein the first mobile switching center and the second mobile switching center reside within a mobile service carrier'"'"'s own system; and

wherein prior to receiving the location routing number from the local number portability database, the first mobile switching center queries a home location register of the first technology system and receives a negative return result, the negative return result including at least one of a mismatch or an unassigned directory number.

11. The method of claim 10, wherein the home location registry of the second technology system further determines whether the mobile directory number is active.

12. The method of claim 10, wherein the home location registry of the second technology system returns an instruction to the second mobile switching center to give the call an error treatment upon the home location registry of the second technology system not being able to verify the record of the recipient.

13. The method of claim 10, wherein the local number portability database includes a plurality of subscriber profiles.

14. The method of claim 10, wherein the first mobile switching center is a time division multiple access mobile switching center.

15. The method of claim 10, wherein the second mobile switching center is a general system for a mobile communications mobile switching center.

16. A system, comprising:

a home location registry of a second technology system; and

a second mobile switching center of the second technology system in communication with the home location registry, the second mobile switching center performing functions including;

receiving, via an inter-machine trunk, a call from a first mobile switching center of a first technology system upon the first mobile switching center receiving a local routing number of the second mobile switching center from a local number portability database, the inter-machine trunk including data translation for translating data back and forth between the first mobile switching center and the second mobile switching center, the call being intended for a mobile directory number of a destination phone that has been intra-service ported from the first technology system to the second technology system, and

querying the home location registry of the second technology system to verify and retrieve a record of a recipient of the call, the home location registry of the second technology system determining an account associated with the mobile directory number of the destination phone,

wherein the first mobile switching center and the second mobile switching center reside within a mobile service carrier'"'"'s own system; and

wherein prior to receiving the location routing number from the local number portability database, the first mobile switching center queries a home location register of the first technology system and receives a negative return result, the negative return result including at least one of a mismatch or an unassigned directory number.

17. The system of claim 16, wherein the local number portability database includes a plurality of subscriber profiles.

18. The system of claim 16, wherein the call is originated from a facsimile.

19. The system of claim 16, wherein the first mobile switching center is a time division multiple access mobile switching center.

20. The system of claim 16, wherein the second mobile switching center is a general system for a mobile communications mobile switching center.