METHOD AND APPARATUS OF RETRANSMISSION BASED ON SOFT COMBINING IN CONTENTION BASED ACCESS SYSTEM
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United States of America Patent
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Issued Date -
Jul 23, 2015
app pub date -
Jan 5, 2015
filing date -
Jan 20, 2014
priority date (Note) -
Abandoned
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Abstract
A method and apparatus of an effective and reliable retransmission based on soft combining when using orthogonal frequency division multiplexing (OFDM) modulation technique in a contention based access system. The method includes receiving a data signal from a transmission node, performing soft combining the valid section part of the data signal which have been previously received and the data signal currently received, determining a collision section of the data signal which is currently received, and saving a valid section part except the collision section of the data signal which is currently received in a buffer. In the contention based access system that uses OFDM modulation technique, in case that data signal reception failure occurs due to a transmission collision, the valid part of the received data signal may be detected and effectively applied to the soft combining, and consequently, the reception probability of data signal can be increased.
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