Patent ID: 6246875
Filing Date: 2001-06-12
Classification: H04W,Y02D

Abstract:
A radio telephone subscriber unit arranged for use in a communication system having a plurality of frequencies divided into a plurality of available frequency bands, said radio telephone subscriber unit including a controller, said controller comprising:(a) means for scanning a cellular digital packet data (CDPD) radio frequency for a list of system identification numbers (SID) where each SID is associated with one of a plurality of available radio frequency bands;(b) means for comparing said scanned SIDs to a list of preferred SIDs stored in said radio telephone subscriber unit;(c) means for selecting a single scanned SID based upon said list of preferred SIDs stored in said radio telephone subscriber unit; and(d) means for acquiring a radio frequency carrier corresponding to a radio frequency band of said selected single scanned SID.