# US 11,115,098 B2 · Configuration and design of CQI and MCS tables for 5G communications

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- Number: US 11,115,098 B2
- Document ID: US11115098B2
- Status: Granted
- Kind: B2
- Application number: 16/372,877
- Filed: 2019-04-02
- Published: 2019-08-15
- Granted: 2021-09-07
- Earliest claimed: 2018-04-06
- Assignees: Apple Inc.
- Applicants: Apple Inc.
- Inventors: Toufiqul Islam; Sergey Panteleev; Debdeep Chatterjee; Fatemeh Hamidi-Sepehr
- Web page: https://patentgrep.com/patent/US11115098B2

## CPC

- H04B 7/0632: {Channel quality parameters, e.g. channel quality indicator [CQI]}
- H04L 1/0016: {involving special memory structures, e.g. look-up tables}
- H04B 7/0626: {Channel coefficients, e.g. channel state information [CSI]}
- H04B 7/0636: {Feedback format}
- H04L 1/0003: {by switching between different modulation schemes}
- H04L 1/0026: {Transmission of channel quality indication}
- H04W 72/21: in the uplink direction of a wireless link, i.e. towards the network
- H04L 5/0007: {the frequencies being orthogonal, e.g. OFDM(A) or DMT}
- H04W 76/27: Transitions between radio resource control [RRC] states
- H04B: TRANSMISSION
- H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M)
- H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72)

## Abstract

User equipment (UE) includes processing circuitry, where to configure the UE for New Radio (NR) communications in an unlicensed spectrum, the processing circuitry is to decode a first configuration message received from a base station, the first configuration message including a channel quality indicator (CQI) table indication identifying a CQI table. A second configuration message is decoded, the second configuration message received separately from the first configuration message and including a modulation and coding scheme (MCS) table indication identifying an MCS table. DCI received via a PDCCH is decoded, the DCI providing a DL grant and an MCS index in the MCS table. DL information received via a PDSCH is decoded using modulation order and target code rate corresponding to the MCS index in the MCS table.

## Claims

### Claim 1

An apparatus, comprising: a processor configured to cause a user equipment (UE) to:
decode first RRC configuration information received from a base station, the first RRC configuration information including a channel quality indicator (CQI) table indication identifying a CQI table;
decode second RRC configuration information, the second RRC configuration information including a modulation coding scheme (MCS) table indication identifying an MCS table, the identified MCS table comprising one of a first MCS table and a second MCS table;
encode channel state information (CSI), the CSI including a CQI index associated with the CQI table, the CQI index for MCS selection by the base station;
decode downlink control information (DCI) received via a physical downlink control channel (PDCCH), the DCI providing a downlink (DL) grant for a physical downlink shared channel (PDSCH) reception and an MCS index to the MCS table;
select a target code rate (TCR) using the identified MCS table based on the MCS index, wherein if the first MCS table is identified, a higher TCR is selected based on the MCS index than it the second MCS table is identified, wherein the second MCS table includes the following modulation order and target code rate for MCS index values of 0-5:
MCS Index
Modulation Order
Target code Rate
Spectral
IMCS
Qm
R × [1024]
efficiency
0
2
30
0.0586
1
2
40
0.0781
2
2
50
0.0977
3
2
64
0.1250
4
2
78
0.1523
5
2
99
0.1934
and
decode the PDSCH based on the DL grant and using modulation order and target code rate corresponding to the MCS index to the MCS table.

### Claim 2 (depends on 1)

The apparatus of claim 1, wherein the processor is further configured to cause the UE to: determine the CQI index for reporting as part of the CSI based on the CQI table indication and a transport block error probability associated with the CQI table.

### Claim 3 (depends on 2)

The apparatus of claim 2, wherein the processor is further configured to cause the UE to: determine the transport block error probability is 0.1 or 0.00001 and is determined based on the CQI table indication.

### Claim 4 (depends on 1)

The apparatus of claim 1, wherein the CQI table is as follows:
CQI
code rate ×
index
modulation
1024
efficiency
0
out of range
1
QPSK
30
0.0586
2
QPSK
50
0.0977
3
QPSK
78
0.1523
4
QPSK
120
0.2344
5
QPSK
193
0.3770
6
QPSK
308
0.6016
7
QPSK
449
0.8770
8
QPSK
602
1.1758
9
16QAM
378
1.4766
10
16QAM
490
1.9141
11
16QAM
616
2.4063
12
64QAM
466
2.7305
13
64QAM
567
3.3223
14
64QAM
666
3.9023
15
64QAM
772
4.5234

### Claim 5 (depends on 1)

The apparatus of claim 1, wherein the MCS table indication is an mcs-Table parameter communicated via the second RRC configuration information.

### Claim 6 (depends on 1)

The apparatus of claim 1, wherein the processor is further configured to cause the UE to: decode a third RRC configuration information, the third RRC configuration information including an MCS table indication identifying an MCS table for uplink communications.

### Claim 7 (depends on 6)

The apparatus of claim 6, wherein the MCS table for the uplink communications includes the following modulation order and target code rate for MCS index values of 0-3, when the uplink communications use Discrete Fourier Transform (DFT) spread Orthogonal Frequency Division Multiplexing (OFDM) (DFT-s-OFDM) or transform precoding:
MCS Index
Modulation Order
Spectral
IMCS
Qm
Target code Rate R × 1024
efficiency
0
q
60/q
0.0586
1
q
80/q
0.0781
2
q
100/q
0.0977
3
q
128/q
0.1250

### Claim 8 (depends on 6)

The apparatus of claim 6, wherein the MCS table for the uplink communications includes the following modulation order and target code rate for MCS index values 0-5, when the uplink communications use Cyclic Prefix Orthogonal Frequency Division Multiplexing (CP-OFDM):
MCS Index
Modulation Order
Target code
Spectral
IMCS
Qm
Rate R × [1024]
efficiency
0
2
30
0.0586
1
2
40
0.0781
2
2
50
0.0977
3
2
64
0.1250
4
2
78
0.1523
5
2
99
0.1934

### Claim 9 (depends on 1)

The apparatus of claim 1, further comprising transceiver circuitry coupled to the processor; and, one or more antennas coupled to the transceiver circuitry.

### Claim 10

A non-transitory computer-readable storage medium that stores instructions for execution by one or more processors of a base station (BS) operating in a 5G network, the instructions to configure the one or more processors for New Radio (NR) communications and to cause the BS to:
encode a first radio resource control (RRC) configuration information for transmission to a user equipment (UE), the first RRC configuration information including a channel quality indicator (CQI) table indication identifying a CQI table;
encode a second RRC configuration information for transmission to the UE, the second RRC configuration information including a modulation and coding scheme (MCS) table indication identifying an MCS table, the identified MCS table comprising one of a first MCS table and a second MCS table;
provide scheduling including a downlink (DL) grant using the identified MCS table, wherein if the first MCS table is identified, a higher target code rate (TCR) corresponds to an MCS index than if the second MCS table is identified, wherein the second MCS table includes the following modulation order and target code rate for MCS index values of 0-5:
MCS Index
Modulation Order
Target code Rate
Spectral
IMCS
Qm
R × [1024]
efficiency
0
2
30
0.0586
1
2
40
0.0781
2
2
50
0.0977
3
2
64
0.1250
4
2
78
0.1523
5
2
99
0.1934
and
encode DL information for transmission via a physical downlink shared channel (PDSCH) using the MCS table.

### Claim 11 (depends on 10)

The non-transitory computer-readable storage medium of claim 10, wherein the CQI table is as follows:
CQI index
modulation
code rate × 1024
efficiency
0
out of range
1
QPSK
30
0.0586
2
QPSK
50
0.0977
3
QPSK
78
0.1523
4
QPSK
120
0.2344
5
QPSK
193
0.3770
6
QPSK
308
0.6016
7
QPSK
449
0.8770
8
QPSK
602
1.1758
9
16QAM
378
1.4766
10
16QAM
490
1.9141
11
16QAM
616
2.4063
12
64QAM
466
2.7305
13
64QAM
567
3.3223
14
64QAM
666
3.9023
15
64QAM
772
4.5234

### Claim 12 (depends on 10)

The non-transitory computer-readable storage medium of claim 10, wherein the instructions further cause the BS to:
encode a third RRC signaling, the third RRC signaling including an MCS table indication identifying an MCS table for uplink communications.

### Claim 13 (depends on 12)

The non-transitory computer-readable storage medium of claim 12, wherein the MCS table for the uplink communications includes the following modulation order and target code rate for MCS index values of 0-3, when the uplink communications use Discrete Fourier Transform (DFT) spread Orthogonal Frequency Division Multiplexing (OFDM) (DFT-s-OFDM) or transform precoding:
MCS Index
Modulation Order
Target code Rate
Spectral
IMCS
Qm
R × 1024
efficiency
0
q
60/q
0.0586
1
q
80/q
0.0781
2
q
100/q
0.0977
3
q
128/q
0.1250

### Claim 14 (depends on 10)

The non-transitory computer-readable storage medium of claim 10, wherein the MCS table indication is an arcs-Table parameter communicated via the second RRC signaling.

### Claim 15 (depends on 10)

The non-transitory computer-readable storage medium of claim 10, wherein the instructions cause the BS to: encode a third RRC configuration information, the third RRC configuration information including an MCS table indication identifying an MCS table for uplink communications.

### Claim 16 (depends on 15)

The non-transitory computer-readable storage medium of claim 15, wherein the MCS table for the uplink communications includes the following modulation order and target code rate for MCS index values of 0-3, when the uplink communications use Discrete Fourier Transform (DFT) spread Orthogonal Frequency Division Multiplexing (OFDM) (DFT-s-OFDM) or transform precoding:
Modulation
MCS Index
Order
Target code
Spectral
IMCS
Qm
Rate R × 1024
efficiency
0
q
60/q
0.0586
1
q
80/q
0.0781
2
q
100/q
0.0977
3
q
128/q
0.1250.

### Claim 17

A non-transitory computer-readable storage medium that stores instructions for execution by one or more processors of a user equipment (UE) operating in a 5G network, the instructions to configure the one or more processors for New Radio (NR) communications and to cause the UE to:
receive a first radio resource control (RRC) configuration information received from a base station, the first RRC configuration information including a channel quality indicator (CQI) table indication identifying a CQI table;
receive a second RRC configuration information, the second RRC configuration information including an MCS table indication identifying an MCS table, the identified MCS table comprising one of a first MCS table and a second MCS table;
transmit, to the base station, channel state information (CSI), the CSI including a CQI index associated with the CQI table, the CQI index for MCS selection by the base station; and
receive scheduling including a downlink (DL) grant using the identified MCS table, wherein if the first MCS table is identified, a higher TCR is selected based on a MCS index than if the second MCS table is identified, wherein the second MCS table includes the following modulation order and target code rate for MCS index values of 0-5:
MCS Index
Modulation Order
Target code Rate
Spectral
IMCS
Qm
R × [1024]
efficiency
0
2
30
0.0586
1
2
40
0.0781
2
2
50
0.0977
3
2
64
0.1250
4
2
78
0.1523
5
2
99
0.1934

### Claim 18 (depends on 17)

The non-transitory computer-readable storage medium of claim 17, wherein the instructions cause the UE to:
determine the CQI index for reporting as part of the CSI based on the CQI table indication and a transport block error probability associated with the CQI table.

### Claim 19 (depends on 18)

The non-transitory computer-readable storage medium of claim 18, wherein the instructions cause the LYE to:
determine the transport block error probability is 0.1 or 0.00001 and is determined based on the CQI table indication.

### Claim 20 (depends on 17)

The non-transitory computer-readable storage medium of claim 17, wherein the CQI table is as follows:
CQI index
modulation
code rate × 1024
efficiency
0
out of range
1
QPSK
30
0.0586
2
QPSK
50
0.0977
3
QPSK
78
0.1523
4
QPSK
120
0.2344
5
QPSK
193
0.3770
6
QPSK
308
0.6016
7
QPSK
449
0.8770
8
QPSK
602
1.1758
9
16QAM
378
1.4766
10
16QAM
490
1.9141
11
16QAM
616
2.4063
12
64QAM
466
2.7305
13
64QAM
567
3.3223
14
64QAM
666
3.9023
15
64QAM
772
4.5234