UPLINK DOWNLINK ASSIGNMENT INDICATOR AMBIGUITY HANDLING FOR INTER-BAND TIME DIVISION DUPLEX CARRIER AGGREGATION
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United States of America Patent
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Issued Date -
Aug 20, 2015
app pub date -
Sep 28, 2012
filing date -
Sep 28, 2012
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Abandoned
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Abstract
Various communication systems may benefit from techniques for handling inter-band carrier aggregation. For example, systems of the third generation partnership project (3 GPP) long term evolution (LTE) advanced (LTE-A) may benefit from an uplink (UL) downlink assignment indicator (DAI) ambiguity handling or inter-band time division duplex (TDD) carrier aggregation (CA). A method can include scheduling physical uplink shared channel in at least one primary cell and at least one secondary cell in a same subframe and granting a different uplink grant to the at least one primary cell and the at least one secondary cell. The method can alternatively include scheduling physical uplink shared channel in at least one serving cell in a subframe with uplink grant and scheduling physical downlink channel in at least another serving cell in following subframe. The method can also include avoiding codebook size confusion by handling uplink downlink assignment indicator ambiguity.
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