Patent ID: 8139694
Filing Date: 2012-03-20
Classification: H04B,H04W,Y02D

Abstract:
1. A method of reducing receiver power consumption in a mobile communication device while in stand by mode, comprising: powering up the receiver substantially at the start of a first paging channel time slot; receiving a frame of data transmitted during the first paging channel time slot, including receiving a first slot descriptor block in an initial portion of the frame of data, and including receiving a first plurality of frequency diverse subchannels, the subchannels having a plurality of substantially concurrent expected symbols occurring in a plurality of predefined baud intervals of the first slot descriptor block and also occurring on at least two of the frequency diverse subchannels for a given baud interval; performing a plurality of cross correlations of the plurality of substantially concurrent expected symbols occurring on at least two frequency diverse subchannels for each of the plurality of predefined baud intervals and summing the results of the plurality of cross correlations to provide a cross correlation sum; receiving a second slot descriptor block of a second paging channel time slot, wherein the second paging channel time slot is subsequent to the first paging channel time slot; and when the cross correlation sum is above a preselected threshold and the first slot descriptor block indicates there is no more information to receive, terminating reception of the second paging channel time slot after the receiving the second slot descriptor block of the second paging channel time slot, and shutting off the receiver.