초록 ▼

The channel scanning method and apparatus uses a priority table (500) to determine the action that should be taken by a mobile station (MS) during an idle frame of a traffic channel (TCH) in order to decode the base station identification code (BSIC) of each channel in a reporting table every ten se

The channel scanning method and apparatus uses a priority table (500) to determine the action that should be taken by a mobile station (MS) during an idle frame of a traffic channel (TCH) in order to decode the base station identification code (BSIC) of each channel in a reporting table every ten seconds in accordance with GSM specification 05.08. The priority table (500) has channel groups (510, 520, 530, 540, 550, 560) based on the role of the cell relative to the MS, the time elapsed since the cell's broadcast channel (BCH) was most recently synchronized, the expected amount of time needed to either detect a frequency burst (FCH) or demodulate a synchronization burst (SCH), the power level of a BCH, and the detected noise level. The priority table is used by a scheduler (600) to aid the MS in efficiently using each idle frame and reducing nonuse of idle frames.

대표청구항 ▼

[ We claim:] [1.]1. A channel scanning method for prioritizing scanning of broadcast channels (BCHs) in a cellular radiotelephone system having a mobile station (MS) and plurality of base stations comprising the steps of:detecting a plurality of BCHs transmitted by the plurality of base stations;sel

[ We claim:] [1.]1. A channel scanning method for prioritizing scanning of broadcast channels (BCHs) in a cellular radiotelephone system having a mobile station (MS) and plurality of base stations comprising the steps of:detecting a plurality of BCHs transmitted by the plurality of base stations;selecting a first BCH from the plurality of BCHs;determining if the MS is synchronized with the first BCH in both a frequency domain and a time domain; andassigning a first priority to the first BCH if the MS is synchronized with the first BCH in both the frequency domain and the time domain, wherein the first priority is a first verify priority if the MS should enter the verify mode and the first priority is a first search priority if the MS should enter the search mode.