Method and apparatus for transmitting uplink control information

An apparatus for transmitting channel state information (CSI), comprising:

• one or more processors and a memory coupled to the one or more processors;
• wherein the memory stores a program to be executed by the one or more processors, and the program includes instructions for:
• determining a threshold code rate according to a modulation and coding scheme (MCS) index when the CSI is to be transmitted on a physical uplink shared channel (PUSCH) without uplink data, wherein the CSI is CSI part 2, and the CSI part 2 comprises a first quantity of bits;
• determining a second quantity of bits of the CSI part 2 according to the threshold code rate and the first quantity of bits of the CSI part 2, wherein the second quantity of bits of the CSI part 2 satisfies:
• A
• -
• A
• ⁢
• 0
• Q
• CSI
• -
• part
• ⁢
• 2
• ′
• *
• M
• <
• c
• ref
• β
• wherein A−A0 represents the second quantity of bits of the CSI part 2, A represents the first quantity of bits of the CSI part 2, A0 represents a quantity of discarded bits of the CSI part 2, Q′CSI−part 2 represents a quantity of available resources for the CSI part 2, M represents a modulation order indicated by the MCS index, cref represents a first code rate, and β represents an offset value greater than 1;
• and
• transmitting the second quantity of bits of the CSI part 2 on the PUSCH;
• wherein the MCS index is within a first range, the first code rate is determined according to the MCS index, and the threshold code rate is determined according to the first code rate and the offset value β;
• and
• wherein determining the second quantity of bits of the CSI part 2 according to the threshold code rate and the first quantity of bits of the CSI part 2 comprises:
• when a code rate corresponding to the CSI part 2 is greater than or equal to the threshold code rate, discarding one or more portions of the CSI part 2 sequentially according to discarding priorities of the one or more portions until the code rate corresponding to the CSI part 2 is below the threshold code rate, wherein an ascending order of the discarding priorities are as follows:
• Priority 0:
• Part 2 wideband channel state information, CSI, for CSI reports 1 to NRep
• Priority 1:
• Part 2 subband CSI of even subbands for CSI report 1
• Priority 2:
• Part 2 subband CSI of odd subbands for CSI report 1
• Priority 3:
• Part 2 subband CSI of even subbands for CSI report 2
• Priority 4:
• Part 2 subband CSI of odd subbands for CSI report 2
• .
• .
• .
• Priority 2NRep-1:
• Part 2 subband CSI of even subbands for CSI report NRep
• Priority 2NRep:
• Part 2 subband CSI of odd subbands for CSI report NRep
• wherein NRep represents the number of CST reports.

A non-transitory computer readable medium storing program codes that are executable by a computing device, wherein the program codes comprise instructions for:

• determining a threshold code rate according to a modulation and coding scheme (MCS) index when channel state information (CSI) is to be transmitted on a physical uplink shared channel (PUSCH) without uplink data, wherein the CSI is CSI part 2, and the CSI part 2 comprises a first quantity of bits;
• determining a second quantity of bits of the CSI part 2 according to the threshold code rate and the first quantity of bits of the CSI part 2, wherein the second quantity of bits of the CSI part 2 satisfies:
• A
• -
• A
• ⁢
• 0
• Q
• CSI
• -
• part
• ⁢
• 2
• ′
• *
• M
• <
• c
• ref
• β
• wherein A−A0 represents the second quantity of bits of the CSI part 2, A represents the first quantity of bits of the CSI part 2, A0 represents a quantity of discarded bits of the CSI part 2, Q′CSI−part 2 represents a quantity of available resources for the CSI part 2, M represents a modulation order indicated by the MCS index, cref represents a first code rate, and β represents an offset value greater than 1;
• and
• transmitting the second quantity of bits of the CSI part 2 on the PUSCH;
• wherein the MCS index is within a first range, the first code rate is determined according to the MCS index, and the threshold code rate is determined according to the first code rate and the offset value β;
• and
• wherein determining the second quantity of bits of the CSI part 2 according to the threshold code rate and the first quantity of bits of the CSI part 2 comprises:
• when a code rate corresponding to the CSI part 2 is greater than or equal to the threshold code rate, discarding one or more portions of the CSI part 2 sequentially according to discarding priorities of the one or more portions until the code rate corresponding to the CSI part 2 is below the threshold code rate, wherein an ascending order of the discarding priorities are as follows:
• Priority 0:
• Part 2 wideband channel state information, CSI, for CSI reports 1 to NRep
• Priority 1:
• Part 2 subband CSI of even subbands for CSI report 1
• Priority 2:
• Part 2 subband CSI of odd subbands for CSI report 1
• Priority 3:
• Part 2 subband CSI of even subbands for CSI report 2
• Priority 4:
• Part 2 subband CSI of odd subbands for CSI report 2
• .
• .
• .
• Priority 2NRep-1:
• Part 2 subband CSI of even subbands for CSI report NRep
• Priority 2NRep:
• Part 2 subband CSI of odd subbands for CSI report NRep
• wherein NRep represents the number of CSI reports.