METHOD AND APPARATUS FOR MULTIPLEXING HIGHER-RESOLUTION CHANNEL STATE INFORMATION (CSI)

1 . A user equipment (UE) for channel state information (CSI) reporting in a wireless communication system, the UE comprising:

a transceiver configured to receive, from a base station (BS), configuration information for K CSI reports, wherein the configuration information includes resource allocation information for an uplink control information (UCI) transmission that includes UCI comprising N UCI parts;

a processor operably connected to the transceiver, the processor configured to:

calculate the K CSI reports and partition the K CSI reports into N parts;

determine an available number of information bits (B1) for the UCI transmission according to the resource allocation information;

determine a required number of information bits (B2) for the UCI transmission according to the calculated K CSI reports; and

determine whether the required number of information bits (B2) exceeds the available number of information bits (B1),

wherein the transceiver is further configured to transmit, to the BS over one slot of an uplink channel, a first part of the N UCI parts including a first of the N parts of the K CSI reports when the required number of information bits (B2) exceeds the available number of information bits (B1),

wherein K and N are positive integers.

2 . The UE of claim 1 , wherein N is two and K is greater or equal to one.

3 . The UE of claim 2 , wherein:

the processor is further configured to:

partition a second part of the N UCI parts into 2K+1 sub-parts, each of which includes a sub-part of a second of the N parts of the K CSI reports;

allocate a priority index to each of the 2K+1 sub-parts for the UCI transmission; and

determine a partial part of the second part of the N UCI parts when the required number of information bits (B2) exceeds the available number of information bits (B1); and

the transceiver is further configured to transmit, to the BS over one slot of the uplink channel, the first part of the N UCI parts and the partial part of the second part of the N UCI parts,

wherein the partial part of the second part of the N UCI parts comprises M sub-parts out of the 2K+1 sub-parts that have a highest priority for the UCI transmission based on the priority index, where M is a largest integer greater or equal to zero and less than 2K+1 sub-parts, and

wherein another required number of information bits (B3) for a transmission of the first part of the N UCI parts and the partial part of the second part of the N UCI parts does not exceed the available number of information bits (B1).

4 . The UE of claim 3 , wherein an increasing order of the priority index (0, 1, 2, . . . , 2K) corresponding to each of the 2K+1 sub-parts is mapped to a decreasing order of a priority for the UCI transmission.

5 . The UE of claim 3 , wherein:

a first part of the 2K+1 sub-parts includes wideband second CSI parts of the K CSI reports;

a (2i)-th part of the 2K+1 sub-parts includes sub-band second CSI part of even-numbered sub-bands for an i-th part of the K CSI reports;

a (2i+1)-th part of the 2K+1 sub-parts includes sub-band second CSI part of odd-numbered sub-bands for the i-th part of the K CSI reports;

i=1, 2, . . . , K; and

a wideband CSI is commonly reported for all sub-bands and a sub-band CSI is reported for each of the sub-bands.

6 . The UE of claim 3 , wherein:

the processor is further configured to:

determine symbols for a number of information bits for the second part of the N UCI parts based on a modulation coding scheme (MCS) and a beta offset value; and

determine whether a UCI code rate associated with the symbols for the number of information bits for the second part of the N UCI parts exceeds a threshold code rate (c T ); and

the transceiver is further configured to transmit, to the BS over one slot of the uplink channel, the first part of the N UCI parts and the partial part of the second part of the N UCI parts when the UCI code rate associated with the symbols for the number of information bits for the second part of the N UCI parts exceeds the threshold code rate (c T ).

7 . The UE of claim 6 , wherein the threshold code rate (c T ) is determined by

c

T

=

c

MCS

β

offset

CSI

-

2

,

wherein c MCS is a target code rate for a physical uplink shared channel (PUSCH) on offset which the UCI transmission is performed, and wherein β offset CSI-2 is the beta offset value for the second part of the N UCI parts.

8 . A base station (BS) for channel state information (CSI) reporting in a wireless communication system, the BS comprising:

a transceiver configured to:

transmit, to a user equipment (UE), configuration information for K CSI reports, wherein the configuration information includes resource allocation information for an uplink control information (UCI) transmission that includes UCI comprising N UCI parts; and

receive, from the UE over one slot of an uplink channel, a first part of the N UCI parts including a first of N parts of K CSI reports when a required number of information bits (B2) exceeds an available number of information bits (B1), wherein K and N are positive integers, and wherein, at the UE:

the K CSI reports are calculated and partitioned into N parts;

the available number of information bits (B1) for the UCI transmission according to the resource allocation information is determined;

the required number of information bits (B2) for the UCI transmission according to the calculated K CSI reports is determined; and

whether the required number of information bits (B2) exceeds the available number of information bits (B1) is determined.

9 . The BS of claim 8 , wherein N is two and K is greater or equal to one.

10 . The BS of claim 9 , wherein the transceiver is further configured to receive, from the UE over one slot of the uplink channel, the first part of the N UCI parts and a partial part of a second part of the N UCI parts, wherein, at the UE:

the second part of the N UCI parts is partitioned into 2K+1 sub-parts, each of which includes a sub-part of a second of the N parts of the K CSI reports;

a priority index is allocated to each of the 2K+1 sub-parts for the UCI transmission; and

the partial part of the second part of the N UCI parts is determined when the required number of information bits (B2) exceeds the available number of information bits (B1),

wherein the partial part of the second part of the N UCI parts comprises M sub-parts out of 2K+1 sub-parts that have a highest priority for the UCI transmission based on the priority index, wherein M is a largest integer greater or equal to zero and less than 2K+1 sub-parts, and

wherein another required number of information bits (B3) for a transmission of the first part of the N UCI parts and the partial part of the second part of the N UCI parts does not exceed the available number of information bits (B1).

11 . The BS of claim 10 , wherein an increasing order of the priority index (0, 1, 2, . . . , 2K) corresponding to each of the 2K+1 sub-parts is mapped to a decreasing order of a priority for the UCI transmission.

12 . The BS of claim 10 , wherein:

a first part of the 2K+1 sub-parts includes wideband second CSI parts of the K CSI reports;

a (2i)-th part of the 2K+1 sub-parts includes sub-band second CSI part of even-numbered sub-bands for an i-th part of the K CSI reports;

a (2i+1)-th part of the 2K+1 sub-parts includes sub-band second CSI part of odd-numbered sub-bands for the i-th part of the K CSI reports;

i=1, 2, . . . , K; and

a wideband CSI is commonly reported for all sub-bands and a sub-band CSI is reported for each of the sub-bands.

13 . The BS of claim 10 , wherein the transceiver is further configured to receive, from the UE over one slot of the uplink channel, the first part of the N UCI parts and the partial part of the second part of the N UCI parts when a UCI code rate associated with symbols for a number of information bits for the second part of the N UCI parts exceeds a threshold code rate (c T ), wherein, at the UE:

the symbols are determined for the number of information bits for the second part of the N UCI parts based on a modulation coding scheme (MCS) and a beta offset value; and

whether the UCI code rate associated with the symbols for the number of information bits for the second part of the N UCI parts exceeds the threshold code rate (c T ) is determined, the threshold code rate (c T ) being determined by

c

T

=

c

MCS

β

offset

CSI

-

2

,

wherein C MCS is a target code rate for a physical uplink shared channel (PUSCH) on which the UCI transmission is performed, and wherein β offset CSI-2 is the beta offset value for the second part of the N UCI parts.

14 . A method of user equipment (UE) for channel state information (CSI) reporting in a wireless communication system, the method comprising:

receiving, from a base station (BS), configuration information for K CSI reports, wherein the configuration information includes resource allocation information for an uplink control information (UCI) transmission that includes UCI comprising N UCI parts;

calculating the K CSI reports and partitioning the K CSI reports into N parts;

determining an available number of information bits (B1) for the UCI transmission according to the resource allocation information;

determining a required number of information bits (B2) for the UCI transmission according to the calculated K CSI reports;

determining whether the required number of information bits (B2) exceeds the available number of information bits (B1); and

transmitting, to the BS over one slot of an uplink channel, a first part of the N UCI parts including a first of the N parts of the K CSI reports when the required number of information bits (B2) exceeds the available number of information bits (B1),

wherein K and N are positive integers.

15 . The method of claim 14 , wherein N is two and K is greater or equal to one.

16 . The method of claim 15 , further comprising:

partitioning a second part of the N UCI parts into 2K+1 sub-parts, each of which includes a sub-part of a second of the N parts of the K CSI reports;

allocating a priority index to each of the 2K+1 sub-parts for the UCI transmission;

determining a partial part of the second part of the N UCI parts when the required number of information bits (B2) exceeds the available number of information bits (B1); and

transmitting, to the BS over one slot of the uplink channel, the first part of the N UCI parts and the partial part of the second part of the N UCI parts,

wherein the partial part of the second part of the N UCI parts comprises M sub-parts out of the 2K+1 sub-parts that have a highest priority for the UCI transmission based on the priority index, where M is a largest integer greater or equal to zero and less than 2K+1 sub-parts, and

wherein another required number of information bits (B3) for a transmission of the first part of the N UCI parts and the partial part of the second part of the N UCI parts does not exceed the available number of information bits (B1).

17 . The method of claim 16 , wherein an increasing order of the priority index (0, 1, 2, . . . , 2K) corresponding to each of the 2K+1 sub-parts is mapped to a decreasing order of a priority for the UCI transmission.

18 . The method of claim 16 , wherein:

a first part of the 2K+1 sub-parts includes wideband second CSI parts of the K CSI reports;

a (2i)-th part of the 2K+1 sub-parts includes sub-band second CSI part of even-numbered sub-bands for an i-th part of the K CSI reports;

a (2i+1)-th part of the 2K+1 sub-parts includes sub-band second CSI part of odd-numbered sub-bands for the i-th part of the K CSI reports;

i=1, 2, . . . , K; and

a wideband CSI is commonly reported for all sub-bands and a sub-band CSI is reported for each of the sub-bands.

19 . The method of claim 16 , further comprising:

determining symbols for a number of information bits for the second part of the N UCI parts based on a modulation coding scheme (MCS) and a beta offset value;

determining whether a UCI code rate associated with the symbols for the number of information bits for the second part of the N UCI parts exceeds a threshold code rate (c T ); and

transmitting, to the BS over one slot of the uplink channel, the first part of the N UCI parts and the partial part of the second part of the N UCI parts when the UCI code rate associated with the symbols for the number of information bits for the second part of the N UCI parts exceeds the threshold code rate (c T ).

20 . The method of claim 19 , wherein the threshold code rate (c T ) is determined by

c

T

=

c

MCS

β

offset

CSI

-

2

,

wherein c MCS is a target code rate for a physical uplink shared channel (PUSCH) on which the UCI transmission is performed, and wherein β offset CSI-2 is the beta offset value for the second part of the N UCI parts.