Method for selecting beams during initial synchronization process using switched beam, switched beam operation method and initial synchronization using the same
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United States of America Patent
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Mar 26, 2013
Grant Date -
May 7, 2009
app pub date -
Dec 13, 2005
filing date -
May 17, 2005
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method for selecting beams, a switched beam operation method during an initial synchronization process, and an initial synchronization method using it are provided for selecting beams to minimize the probability of occurrence of interferences between cells by considering a distance between beams within neighboring sectors during an initial synchronization process using switched beams, in an orthogonal frequency division multiplexing (OFDM) cellular system employing a smart antenna. The inventive method comprises the steps of dividing each cell into sectors, and counting the number of fixed beams per cell, and selecting a switched beam for minimizing probability of interference, from fixed beams presenting in a corresponding sector, based on distances between a selected beam and beams of all of adjacent cells and the number of cases to be selected in a subsequent time slot, according to the counted number of the fixed beams existing in each sector.
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