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US 2013/0279449 A1Published application
Feedback signaling error detection and checking in mimo wireless communication systems
AssigneeInterDigital Technology Corporation
InventorKyle Jung-Lin Pan
Life of this patent
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Abstract
A method of feedback in a wireless transmit receive unit includes providing a precoding matrix index (PMI), error checking the (PMI) to produce an error check (EC) bit, coding the PMI and the EC bit and transmitting the coded PMI and EC bit.
Claims26
A method for a wireless transmit/receive unit (WTRU) to provide error checking functionality for link adaption and multiple input multiple output (MIMO) feedback for a plurality of transmission bands, the method comprising:
- determining at least two feedback signals, wherein each of the at least two feedback signals comprise one or more channel quality indices (CQIs) and one or more precoding matrix indices (PMIs);
- applying a first error detection scheme to a first feedback signal of the at least two feedback signals, wherein the first error detection scheme is applied based on the first feedback signal being transmitted over a control type channel, and applying the first error detection scheme comprises:
- applying a first channel coding channel coding scheme to the first feedback signal, the first feedback signal comprising a first CQI and a first PMI;
- and
- applying a second error detection scheme to a second feedback signal of the at least two feedback signals, wherein the second error detection scheme is applied based on the second feedback signal being transmitted over a data type channel, and applying the first error detection scheme comprises:
- attaching cyclic redundancy check (CRC) bits to the second feedback signal, the second feedback signal comprising a second CQI and a second PMI, and
- applying a second channel coding scheme to the second feedback signal and the CRC bits, wherein the first channel coding scheme is different than the second channel coding scheme;
- transmitting the first feedback signal to an evolved Node-B (eNB) over the control type channel;
- and
- transmitting the second feedback signal with user data to the eNB over the data type channel.
7 more elements
A wireless transmit/receive unit (WTRU) comprising a processor configured to:
- determine at least two feedback signals, wherein each of the at least two feedback signals comprise one or more channel quality indices (CQIs) and one or more precoding matrix indices (PMIs),
- apply a first error detection scheme to a first feedback signal of the at least two feedback signals based on the first feedback signal being transmitted over a control type channel, wherein the processor being configured to apply the first error detection scheme comprises the processor being configured to apply a first channel coding channel coding scheme to the first feedback signal, the first feedback signal comprising a first CQI and a first PMI;
- and
- apply a second error detection scheme to a second feedback signal of the at least two feedback signals based on the second feedback signal being transmitted over a data type channel, wherein the processor being configured to apply the first error detection scheme comprises the processor being configured to:
- attach cyclic redundancy check (CRC) bits to the second feedback signal, the second feedback signal comprising a second CQI and a second PMI, and
- apply a second channel coding scheme to the second feedback signal and the CRC bits, wherein the first channel coding scheme is different than the second channel coding scheme;
- transmit the first feedback signal to an evolved Node-B (eNB) over the control type channel;
- and
- transmit the second feedback signal with user data to the eNB over the data type channel.
6 more elements
Dependencies are inferred from the claim text.