H - Electricity – 04 – Q
Patent
H - Electricity
04
Q
H04Q 7/36 (2006.01) H04Q 7/38 (2006.01)
Patent
CA 2302022
A unique method and apparatus for allowing a wireless communication system to offer increased IMSI number functionality and corresponding global roaming capability by converting an identification number received from a particular mobile station in the wireless communication system in a first format to a second format which allows for use of more information included in the identification number is disclosed. A variable length IMSI number in TIA/EIA/IS-95 format is received at a base station in encoded form. The base station decodes the parameters included in the IMSI number into their original decimal values, and, if all parameters have not been sent in accordance with the IMSI type, will add the proper values for the unsent parameters. The MCC, IMSI_S, and IMSI_11_12 parameters of the IMSI number are then stored in a 15-digit IMSI array. The contents of each location of the 15-digit array are associated with a specific location in an 8-octet structure which is required by ANSI/TIA/EIA-41. The value in each location of the array is converted to Binary Coded Decimal (BCD) format and mapped to its associated location in the 8-octet structure. The IMSI number will then be in a format compliant with ANSI/TIA/EIA-41, thus allowing a service provider to offer increased IMSI functionality to its customers and allow the IMSI number to be used as a national mobile station identifier.
Chandnani Vishal Sham
Garvert Anita Ruth
Kirby Eades Gale Baker
Lucent Technologies Inc.
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