Patent ID: 8209332
Filing Date: 2012-06-26
Classification: H04W,Y10S

Abstract:
1. A method of producing a subnet, comprising: retrieving a first record from a first table of a compressed Preferred Roaming List (PRL) stored in a wireless communication device, wherein the compressed PRL comprises at least the first table and a second table comprising information for roaming from one system operator to another, the compressed PRL being associated with a group of base station sectors, each of the sectors having a unique Internet Protocol address, the first record comprising residual data not in the second table and an indicator for accessing corresponding common data in the second table, wherein the common data is common to two or more of a plurality of subnets of a non-compressed PRL, wherein the residual data comprises a first portion of the subnet and is unique to the subnet, and wherein at least a portion of at least one of the common data or the residual data is derived from a logical operation on a network identification and a subnet mask; retrieving a second record from the second table based on the indicator, the second record comprising the common data corresponding to the residual data in the first record, wherein the common data comprises a second portion of the subnet; and concatenating the first record with the second record to produce the subnet, wherein the subnet is associated with the group of base station sectors.