Method and device for adjusting channel frequency domain offset of physical random access channel
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United States of America Patent
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Feb 20, 2018
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app pub date -
Mar 6, 2015
filing date -
Mar 6, 2014
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Abstract
Provided is a method for adjusting channel frequency domain offset of a physical random access channel (PRACH), comprising: determining the current frequency domain location of a PRACH; obtaining interference over thermal (IOT) values of physical resource blocks (PRB) of all uplink subframes; comparing the IOT values of all the PRBs of the uplink subframes with an IOT detection threshold to determine from all the PRBs of the uplink subframes a plurality of PRBs with the IOT values above the IOT detection threshold; judging whether the plurality of PRBs with IOT values above the IOT detection threshold overlap with the current frequency domain location of the PRACH; if yes, then adjusting the channel frequency domain offset of the current frequency domain location of the PRACH based on a predetermined adjustment rule to determine the adjusted channel frequency domain offset. If the system has strong IOT or strong burst interference, then the channel location of the PRACH can be adjusted automatically to ensure that a base station can correctly detect and parse a preamble carried by the PRACH, thus ensuring successful access of a UE.
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