×

Method and apparatus for preferred roaming list compression

  • US 6,901,395 B2
  • Filed: 11/05/2001
  • Issued: 05/31/2005
  • Est. Priority Date: 11/05/2001
  • Status: Active Grant
First Claim
Patent Images

1. A processor implemented method of generating a compressed preferred roaming list (PRL), comprising:

  • generating a subnet address by performing a bitwise AND operation on a network identification (ID) and a subnet mask, the subnet address consisting of a plurality of most significant bits and a plurality of least significant bits, the most significant bits of the subnet address representing a common part of a subnet to be factored out;

    storing the most significant bits of the subnet address in a subnet table;

    storing the least significant bits of the subnet address in a system table;

    factoring out at least one set of data common to two or more subnets;

    storing said at least one set of data common to said two or more subnets in the subnet table;

    generating an indicator for accessing said at least one set of data; and

    storing the indicator in the system table.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×