Priority-based channel coding for control information
Systems, methods, and instrumentalities are disclosed for priority-based channel coding for control information. A wireless transmit/receive unit (WTRU) may sort control information associated with a first control information type into a first control information group and the control information associated with a second control information type into a second control information group, for example, based on respective priorities associated with the first and second control information types. The WTRU may group one or more bits of the first control information group into a first bit level control information group and a second bit level control information group based on priority. The WTRU may selectively apply a cyclic redundancy check (CRC) to the first control information group, the second control information group, the first bit level control information group, and/or the second bit level control information group.
1. A method performed by a wireless transmit/receive unit, WTRU, the method comprising:
generating first control information and second control information, wherein the first control information and the second control information are associated with a plurality of control information types, where each control information type is associated with a respective priority;
grouping bits from the first control information and the second control information into at least two groups of bits, wherein a first group of bits comprises bits of a first priority from the first and second control information, and a second group of bits comprises bits of a second priority from the first and second control information;
applying cyclic redundancy check (CRC) bits to one or more of the first group of bits or the second group of bits; and
transmitting the first group of bits, the second group of bits, and the CRC bits to bit channels of a polar encoder, based on respective priorities of the first and second groups of bits and respective priorities of the bit channels.
2. The method of claim 1 , wherein each control information type comprises one or more of a synchronization signal, SS, block index, SSBI, a rank indicator, RI, a precoding matrix indicator, PMI, a channel quality indicator, CQI, a CSI-RS resource indicator, CRI, a precoder type indicator, PTI, a BeamID, an ACK/NACK, or a scheduling request, SR.
3. The method of claim 1 , wherein the first group of bits comprises a group of least significant bits, LSBs, from one or more of the first control information or the second control information, and the second group of bits comprises a group of most significant bits, MSBs, from one or more of the first control information or the second control information.
4. A wireless transmit/receive unit, WTRU, comprising a processor configured to:
generate first control information and second control information, wherein the first control information and the second control information are associated with a plurality of control information types, where each control information type is associated with a respective priority;
group bits from the first control information and the second control information into at least two groups of bits, wherein a first group of bits comprises bits of a first priority from the first and second control information, and a second group of bits comprises bits of a second priority from the first and second control information;
apply cyclic redundancy check (CRC) bits to one or more of the first group of bits or the second group of bits; and
transmit the first group of bits, the second group of bits, and the CRC bits to bit channels of a polar encoder, based on respective priorities of the first and second groups of bits and respective priorities of the bit channels.
5. The WTRU of claim 4 , wherein each control information type comprises one or more of a synchronization signal, SS, block index, SSBI, a rank indicator, RI, a precoding matrix indicator, PMI, a channel quality indicator, CQI, a CSI-RS resource indicator, CRI, a precoder type indicator, PTI, a BeamID, an ACK/NACK, or a scheduling request, SR.
6. The WTRU of claim 4 , wherein the first group of bits comprises a group of least significant bits, LSBs, from one or more of the first control information or the second control information, and the second group of bits comprises a group of most significant bits, MSBs, from one or more of the first control information or the second control information.