Detection and recovery of HARQ NAK-to-ACK feedback error in wireless communications systems
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United States of America Patent
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May 17, 2016
Grant Date -
May 28, 2015
app pub date -
Jan 27, 2015
filing date -
Jul 7, 2008
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Abstract
In wireless communication networks that use ARQ/HARQ feedback protocols, when a first device receives an apparent HARQ ACK from a second device, the first device may make a new transmission using a HARQ Channel ID whose previous usage was under conditions indicating a likelihood of error in the ACK. When the second device receives the new transmission, the reuse of that HARQ Channel ID in a new transmission rather than a retransmission lets the second device know that its previous NAK transmission was incorrectly received as an ACK.
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