Parameter combination for coherent joint transmission
Apparatuses and methods for subset restriction for parameter combination for coherent joint transmission in wireless networks. A method performed by a user equipment includes receiving information about a CSI report. The information includes codebook parameters N L ≥1 combinations of values of {L 1 , . . . , L N TRP } from a first table and a value of (p v , β) from a second table. {L 1 , . . . , L N TRP } is used to determine a number of first set of vectors associated with each of N TRP groups of ports, N TRP is a number ≥1, β is a parameter used to determine a maximum number of coefficients, and p v are parameters used to determine a second set of vectors. The method further includes determining the CSI report based on the information and transmitting the CSI report. The codebook parameters are configured based on a third table that links the first and second tables.
1 . A user equipment (UE) comprising:
a transceiver configured to receive information about a channel state information (CSI) report, the information including codebook parameters:
N L >1 combinations of values of {L 1 , . . . , L N TRP } from a first table, and
a value of (p v , β) from a second table,
wherein {L 1 , . . . , L N TRP } is related to a number of first set of vectors associated with each of N TRP groups of ports, N TRP is a number ≥1, β is a parameter related to a maximum number of coefficients, and p v are parameters related to a second set of vectors; and
a processor operably coupled to the transceiver, the processor configured to determine the CSI report based on the information,
wherein the transceiver is further configured to transmit the CSI report,
wherein the codebook parameters are configured based on a third table that links the first and second tables.
2 . The UE of claim 1 , wherein a first radio resource control (RRC) parameter indicates the N L combinations of values of {L 1 , . . . , L N TRP } from the first table given by:
First RRC
N TRP
parameter
{L 1 , . . . , L N TRP }
1
A1
{2}
A2
{4}
A3
{6}
2
A4
{2, 2}
A5
{2, 4}
A6
{4, 2}
A7
{4, 4}
3
A8
{2, 2, 2}
A9
{2, 2, 4}
A10
{2, 4, 2}
A11
{4, 2, 2}
A12
{4, 4, 4}
4
A13
{2, 2, 2, 2}
A14
{2, 2, 2, 4}
A15
{2, 2, 4, 4}
A16
{4, 4, 4, 4}
wherein each of the N L combinations of values of {L 1 , . . . , L N TRP } is indicated via N TRP and a value of the first RRC parameter that is configured from a set of values including A1, A2, . . . , and A16.
3 . The UE of claim 1 , wherein:
the second table comprises a first value of p v for a first rank set {1, 2} and a second value of p v for a second rank set {3, 4} and
the CSI report is determined for a rank value v from one of the first and second rank sets.
4 . The UE of claim 3 , wherein a second radio resource control (RRC) parameter indicates a value of (p v , β) from the second table given by:
Second RRC
p υ
parameter
υ ∈ {1, 2}
υ ∈ {3, 4}
β
B1
⅛
1/16
¼
B2
⅛
1/16
½
B3
¼
⅛
¼
B4
¼
⅛
½
B5
¼
¼
¾
B6
½
¼
½
B7
½
½
½
wherein the value of (p v , β) is indicated via a value of the second RRC parameter that is configured from a set of values including B1, B2, . . . , and B7.
5 . The UE of claim 1 , wherein the third table includes configurable combinations between a value of {L 1 , . . . , L N TRP } and a value of (p v , β) marked with ‘x’ in the following table:
First radio
resource control
(RRC)
Second RRC parameter
N TRP
parameter
B1
B2
B3
B4
B5
B6
B7
1
A1
x
x
A2
x
x
x
x
A3
x
x
2
A4
x
A5
x
A6
x
A7
x
x
x
3
A8
x
x
A9
x
x
A10
x
x
A11
x
x
A12
x
x
x
x
x
x
4
A13
x
A14
x
A15
x
x
A16
x
x
x
where the first RRC parameter is associated with the first table;
the second RRC parameter is associated with the second table;
A1 corresponds to L 1 =2;
A2 corresponds to L 1 =4;
A3 corresponds to L 1 =6;
A4 corresponds to {L 1 , L 2 }={2, 2};
A5 corresponds to {L 1 , L 2 }={2, 4};
A6 corresponds to {L 1 , L 2 }={4, 2};
A7 corresponds to {L 1 , L 2 }={4, 4};
A8 corresponds to {L 1 , L 2 , L 3 }={2, 2, 2};
A9 corresponds to {L 1 , L 2 , L 3 }={2, 2, 4};
A10 corresponds to {L 1 , L 2 , L 3 }={2, 4, 2};
A11 corresponds to {L 1 , L 2 , L 3 }={4, 2, 2};
A12 corresponds to {L 1 , L 2 , L 3 }={4, 4, 4};
A13 corresponds to {L 1 , L 2 , L 3 , L 4 }={2, 2, 2, 2};
A14 corresponds to {L 1 , L 2 , L 3 , L 4 }={2, 2, 2, 4};
A15 corresponds to {L 1 , L 2 , L 3 , L 4 }={2, 2, 4, 4};
A16 corresponds to {L 1 , L 2 , L 3 , L 4 }={4, 4, 4, 4};
B1 corresponds to
{
p
v
∈
{
1
,
2
}
,
p
v
∈
{
3
,
4
}
,
β
}
=
{
1
8
,
1
16
,
1
4
}
;
B2 corresponds to
{
p
v
∈
{
1
,
2
}
,
p
v
∈
{
3
,
4
}
,
β
}
=
{
1
8
,
1
16
,
1
2
}
;
B3 corresponds to
{
p
v
∈
{
1
,
2
}
,
p
v
∈
{
3
,
4
}
,
β
}
=
{
1
4
,
1
8
,
1
4
}
B4 corresponds to
{
p
v
∈
{
1
,
2
}
,
p
v
∈
{
3
,
4
}
,
β
}
=
{
1
4
,
1
8
,
1
2
}
;
B5 corresponds to
{
p
v
∈
{
1
,
2
}
,
p
v
∈
{
3
,
4
}
,
β
}
=
{
1
4
,
1
4
,
3
4
}
;
B6 corresponds to
{
p
v
∈
{
1
,
2
}
,
p
v
∈
{
3
,
4
}
,
β
}
=
{
1
2
,
1
4
,
1
2
}
;
and
B7 corresponds to
{
p
v
∈
{
1
,
2
}
,
p
v
∈
{
3
,
4
}
,
β
}
=
{
1
2
,
1
2
,
1
2
}
.
6 . The UE of claim 1 , wherein a radio resource control (RRC) parameter indicates a value of N L from {1, 2, 4}.
7 . The UE of claim 1 , wherein each of the N TRP groups of ports corresponds to CSI reference signal (CSI-RS) antenna ports associated with a CSI-RS resource.
8 . The UE of claim 1 , wherein:
the UE is not expected to be configured with N TRP and a first radio resource control (RRC) parameter corresponding to {L 1 , . . . , L N TRP } including 4 or 6, when P CSI-RS =4, where P CSI-RS is a number of CSI-reference signal (CSI-RS) ports for each of N TRP CSI-RS resources; or
the UE is not expected to be configured with N TRP and the first RRC parameter corresponding to {L 1 }={6}, when:
P
CSI
-
RS
<
32
;
allowed rank values for the CSI report include 3 or 4; or
R=2, where R is a parameter configured with a higher-layer parameter numberOfPMI-SubbandsPerCQI-Subband.
9 . A base station (BS) comprising:
a processor; and
a transceiver operably coupled to the processor, the transceiver configured to:
transmit information about a channel state information (CSI) report, the information including codebook parameters:
N L >1 combinations of values of {L 1 , . . . , L N TRP } from a first table, and
a value of (p v , β) from a second table,
wherein {L 1 , . . . , L N TRP } is related to a number of first set of vectors associated with each of N TRP groups of ports, N TRP is a number ≥1, β is a parameter related to a maximum number of coefficients, and p v are parameters related to a second set of vectors; and
receive the CSI report that is based on the information,
wherein the codebook parameters are configured based on a third table that links the first and second tables.
10 . The BS of claim 9 , wherein a first radio resource control (RRC) parameter indicates the N L combinations of values of {L 1 , . . . , L N TRP } from the first table given by:
First RRC
N TRP
parameter
{L 1 , . . . , L N TRP }
1
A1
{2}
A2
{4}
A3
{6}
2
A4
{2, 2}
A5
{2, 4}
A6
{4, 2}
A7
{4, 4}
3
A8
{2, 2, 2}
A9
{2, 2, 4}
A10
{2, 4, 2}
A11
{4, 2, 2}
A12
{4, 4, 4}
4
A13
{2, 2, 2, 2}
A14
{2, 2, 2, 4}
A15
{2, 2, 4, 4}
A16
{4, 4, 4, 4}
wherein each of the N L combinations of values of {L 1 , . . . , L N TRP } is indicated via N TRP and a value of the first RRC parameter that is configured from a set of values including A1, A2, . . . , and A16.
11 . The BS of claim 9 , wherein:
the second table comprises a first value of p v for a first rank set {1, 2} and a second value of p v for a second rank set {3, 4} and
the CSI report is for a rank value v from one of the first and second rank sets.
12 . The BS of claim 11 , wherein a second radio resource control (RRC) parameter indicates a value of (p v , β) from the second table given by:
Second RRC
p υ
parameter
υ ∈ {1, 2}
υ ∈ {3, 4}
β
B1
⅛
1/16
¼
B2
⅛
1/16
½
B3
¼
⅛
¼
B4
¼
⅛
½
B5
¼
¼
¾
B6
½
¼
½
B7
½
½
½
wherein the value of (p v , β) is indicated via a value of the second RRC parameter that is configured from a set of values including B1, B2, . . . , and B7.
13 . The BS of claim 9 , wherein the third table includes configurable combinations between a value of {L 1 , . . . , L N TRP } and a value of (p v , β) marked with ‘x’ in the following table:
First radio
resource control
(RRC)
Second RRC parameter
N TRP
parameter
B1
B2
B3
B4
B5
B6
B7
1
A1
x
x
A2
x
x
x
x
A3
x
x
2
A4
x
A5
x
A6
x
A7
x
x
x
3
A8
x
x
A9
x
x
A10
x
x
A11
x
x
A12
x
x
x
x
x
x
4
A13
x
A14
x
A15
x
x
A16
x
x
x
where the first RRC parameter is associated with the first table;
the second RRC parameter is associated with the second table;
A1 corresponds to L 1 =2;
A2 corresponds to L 1 =4;
A3 corresponds to L 1 =6;
A4 corresponds to {L 1 , L 2 }={2, 2};
A5 corresponds to {L 1 , L 2 }={2, 4};
A6 corresponds to {L 1 , L 2 }={4, 2};
A7 corresponds to {L 1 , L 2 }={4, 4};
A8 corresponds to {L 1 , L 2 , L 3 }={2, 2, 2};
A9 corresponds to {L 1 , L 2 , L 3 }={2, 2, 4};
A10 corresponds to {L 1 , L 2 , L 3 }={2, 4, 2};
A11 corresponds to {L 1 , L 2 , L 3 }={4, 2, 2};
A12 corresponds to {L 1 , L 2 , L 3 }={4, 4, 4};
A13 corresponds to {L 1 , L 2 , L 3 , L 4 }={2, 2, 2, 2};
A14 corresponds to {L 1 , L 2 , L 3 , L 4 }={2, 2, 2, 4};
A15 corresponds to {L 1 , L 2 , L 3 , L 4 }={2, 2, 4, 4};
A16 corresponds to {L 1 , L 2 , L 3 , L 4 }={4, 4, 4, 4};
B1 corresponds to
{
p
v
∈
{
1
,
2
}
,
p
v
∈
{
3
,
4
}
,
β
}
=
{
1
8
,
1
16
,
1
4
}
;
B2 corresponds to
{
p
v
∈
{
1
,
2
}
,
p
v
∈
{
3
,
4
}
,
β
}
=
{
1
8
,
1
16
,
1
2
}
;
B3 corresponds to
{
p
v
∈
{
1
,
2
}
,
p
v
∈
{
3
,
4
}
,
β
}
=
{
1
4
,
1
8
,
1
4
}
B4 corresponds to
{
p
v
∈
{
1
,
2
}
,
p
v
∈
{
3
,
4
}
,
β
}
=
{
1
4
,
1
8
,
1
2
}
;
B5 corresponds to
{
p
v
∈
{
1
,
2
}
,
p
v
∈
{
3
,
4
}
,
β
}
=
{
1
4
,
1
4
,
3
4
}
;
B6 corresponds to
{
p
v
∈
{
1
,
2
}
,
p
v
∈
{
3
,
4
}
,
β
}
=
{
1
2
,
1
4
,
1
2
}
;
and
B7 corresponds to
{
p
v
∈
{
1
,
2
}
,
p
v
∈
{
3
,
4
}
,
β
}
=
{
1
2
,
1
2
,
1
2
}
.
14 . The BS of claim 9 , wherein a radio resource control (RRC) parameter indicates a value of N L from {1, 2, 4}.
15 . The BS of claim 9 , wherein each of the N TRP groups of ports corresponds to CSI reference signal (CSI-RS) antenna ports associated with a CSI-RS resource.
16 . The BS of claim 9 , wherein:
a user equipment (UE) is not expected to be configured with N TRP and a first radio resource control (RRC) parameter corresponding to {L 1 , . . . , L N TRP } including 4 or 6, when P CSI-RS =4, where P CSI-RS is a number of CSI-reference signal (CSI-RS) ports for each of N TRP CSI-RS resources; or
the UE is not expected to be configured with N TRP and the first RRC parameter corresponding to {L 1 }={6}, when:
P
CSI
-
RS
<
32
;
allowed rank values for the CSI report include 3 or 4; or
R=2, where R is a parameter configured with a higher-layer parameter numberOfPMI-SubbandsPerCQI-Subband.
17 . A method performed by a user equipment, the method comprising:
receiving information about a channel state information (CSI) report, the information including codebook parameters:
N L >1 combinations of values of {L 1 , . . . , L N TRP } from a first table, and
a value of (p v , β) from a second table,
wherein {L 1 , . . . , L N TRP } is related to a number of first set of vectors associated with each of N TRP groups of ports, N TRP is a number ≥1, β is a parameter related to a maximum number of coefficients, and p v are parameters related to a second set of vectors;
determining the CSI report based on the information; and
transmitting the CSI report,
wherein the codebook parameters are configured based on a third table that links the first and second tables.
18 . The method of claim 17 , wherein a first radio resource control (RRC) parameter indicates the N L combinations of values of {L 1 , . . . , L N TRP } from the first table given by:
First RRC
N TRP
parameter
{L 1 , . . . , L N TRP }
1
A1
{2}
A2
{4}
A3
{6}
2
A4
{2, 2}
A5
{2, 4}
A6
{4, 2}
A7
{4, 4}
3
A8
{2, 2, 2}
A9
{2, 2, 4}
A10
{2, 4, 2}
A11
{4, 2, 2}
A12
{4, 4, 4}
4
A13
{2, 2, 2, 2}
A14
{2, 2, 2, 4}
A15
{2, 2, 4, 4}
A16
{4, 4, 4, 4}
wherein each of the N L combinations of values of {L 1 , . . . , L N TRP } is indicated via N TRP and a value of the first RRC parameter that is configured from a set of values including A1, A2, . . . , and A16.
19 . The method of claim 17 , wherein:
the second table comprises a first value of p v for a first rank set {1, 2} and a second value of p v for a second rank set {3, 4} and
the CSI report is determined for a rank value v from one of the first and second rank sets.
20 . The method of claim 19 , wherein a second radio resource control (RRC) parameter indicates a value of (p v , β) from the second table given by:
Second RRC
p υ
parameter
υ ∈ {1, 2}
υ ∈ {3, 4}
β
B1
⅛
1/16
¼
B2
⅛
1/16
½
B3
¼
⅛
¼
B4
¼
⅛
½
B5
¼
¼
¾
B6
½
¼
½
B7
½
½
½
wherein the value of (p v , β) is indicated via a value of the second RRC parameter that is configured from a set of values including B1, B2, . . . , and B7.