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Method for recovering communication service

  • US 6,175,733 B1
  • Filed: 03/05/1999
  • Issued: 01/16/2001
  • Est. Priority Date: 03/05/1999
  • Status: Expired due to Term
First Claim
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1. A method for recovering communication service by a communication device after an interruption of communication service to the communication device, the communication device having created a serving and neighbor cell list (SNL) prior to the interruption of communication service, the method comprising:

  • scanning the SNL in an attempt to detect an appropriate carrier signal having a sufficient signal quality and a sufficient signal strength;

    scanning a subset of frequencies selected from a learned bandmap in an attempt to detect an appropriate carrier signal;

    creating a list of any frequencies at which an appropriate carrier signal is detected while scanning the subset of frequencies selected from the first bandmap;

    alternately scanning the SNL and successive subsets of frequencies selected from the first bandmap while continuing to attempt to detect a suitable carrier signal;

    upon having not detected any suitable carrier signals, the method further comprising;

    ceasing the scanning a subset of frequencies selected from the learned bandmap;

    scanning a subset of frequencies selected from a regional bandmap in an attempt to detect an appropriate carrier signal; and

    creating a list of any frequencies at which an appropriate carrier signal is detected while scanning the subset of frequencies selected from the regional bandmap.

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