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

  • US 8,254,398 B2
  • Filed: 11/13/2009
  • Issued: 08/28/2012
  • Est. Priority Date: 08/01/2003
  • Status: Expired due to Fees
First Claim
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1. A system for migrating a call for a mobile directory number (MDN) from an originating phone to a destination phone which has been intra-service ported from a first mobile switching center of a first technology to a second mobile switching center of a second technology, the first mobile switching center and the second mobile switching center residing within a mobile service carrier'"'"'s own system, the system comprising:

  • a first mobile switching center;

    receiving a negative return result from a first home location register (HLR) upon querying the first HLR, the negative return result including at least one of a mismatch and an Unassigned Directory Number (DN), the first HLR operating on the first technology;

    receiving a local routing number (LRN) for the second mobile switching center upon querying a local number portability (LNP) database storing the LRN associated with the MDN, the LNP database in communication with the first mobile switching center and the second mobile switching center; and

    routing the call to the second mobile switching center via an inter-machine trunk (IMT), the IMT including data translation for translating data back and forth between the first mobile switching center and the second mobile switching center;

    wherein the first technology is a time division multiple access (TDMA) technology and the second technology is a Global System for Mobile Communications (GSM) GAIT technology homed in an HLR on the TDMA technology.

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