# US 2018/0324010 A1 · Limits for modulation and coding scheme values

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- Number: US 2018/0324010 A1
- Document ID: US20180324010A1
- Status: Published application
- Kind: A1
- Application number: 15/934,771
- Filed: 2018-03-23
- Published: 2018-11-08
- Earliest claimed: 2017-05-04
- Assignees: QUALCOMM Incorporated
- Applicants: QUALCOMM Incorporated
- Inventors: Kapil Gulati; Tien Viet Nguyen; Sudhir Kumar Baghel; Libin Jiang; Zhibin Wu
- Web page: https://patentgrep.com/patent/US20180324010A1

## CPC

- H04L 27/08: Amplitude regulation arrangements
- H04L 1/0003: {by switching between different modulation schemes}
- H04L 1/0011: {applied to payload information}
- H04L 1/0016: {involving special memory structures, e.g. look-up tables}
- H04L 1/0025: {Transmission of mode-switching indication}
- H04L 27/04: Modulator circuits; Transmitter circuits
- H04L 27/2627: {Modulators}
- H04L 1/0009: {by adapting the channel coding (H04L1/1812 takes precedence)}
- H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M)

## Abstract

Various aspects of the disclosure relate to limits for modulation and coding scheme (MCS) values. For example, a first set of limits (e.g., minimum and maximum limits) may be used for a first MCS table and a second set of limits may be used for a second MCS table. The disclosure also relates in some aspects to inter-device signaling that indicates which minimum and maximum limits for an MCS table are to be used for communication between the devices.

## Claims

### Claim 1

An apparatus for communication comprising:
a memory; and
a processor coupled to the memory,
the processor and the memory configured to:
determine a first minimum value and a first maximum value for a first set of modulation and coding scheme (MCS) values defined for peer-to-peer communication between a first device and a second device;
determine a second minimum value and a second maximum value for a second set of MCS values defined for the peer-to-peer communication; and
send the first minimum value, the first maximum value, the second minimum value, and the second maximum value to the first device.

### Claim 2 (depends on 1)

The apparatus of claim 1, further comprising:
determining at least one other minimum value and at least one other maximum value for at least one other set of MCS values defined for the peer-to-peer communication; and
sending the at least one other minimum value and the at least one other maximum value to the first device.

### Claim 3 (depends on 1)

The apparatus of claim 1, wherein:
the first set of MCS values comprises a first MCS table; and
the second set of MCS values comprises a second MCS table.

### Claim 4 (depends on 3)

The apparatus of claim 3, wherein:
the first MCS table supports up to a first modulation order; and
the second MCS table supports up to a second modulation order that is different from the first modulation order.

### Claim 5 (depends on 3)

The apparatus of claim 3, wherein:
the first MCS table supports up to 16 quadrature amplitude modulation (QAM); and
the second MCS table supports up to 64 QAM.

### Claim 6 (depends on 1)

The apparatus of claim 1, wherein the determination of the first minimum value, the first maximum value, the second minimum value, and the second maximum value comprises:
determining a condition of a channel to be used for the peer-to-peer communication; and
selecting the first minimum value, the first maximum value, the second minimum value, and the second maximum value based on the determined condition of the channel.

### Claim 7 (depends on 6)

The apparatus of claim 6, wherein the channel is a sidelink data channel.

### Claim 8 (depends on 6)

The apparatus of claim 6, wherein the channel is a vehicle-to-anything data channel.

### Claim 9 (depends on 1)

The apparatus of claim 1, wherein the determination of the first minimum value, the first maximum value, the second minimum value, and the second maximum value is based on a condition associated with at least one of the first device or the second device.

### Claim 10 (depends on 9)

The apparatus of claim 9, wherein the condition comprises at least one rate of motion of at least one of the first device or the second device.

### Claim 11

A method of communication for an apparatus, comprising:
determining a first minimum value and a first maximum value for a first set of modulation and coding scheme (MCS) values defined for peer-to-peer communication between a first device and a second device;
determining a second minimum value and a second maximum value for a second set of MCS values defined for the peer-to-peer communication; and
sending the first minimum value, the first maximum value, the second minimum value, and the second maximum value to the first device.

### Claim 12 (depends on 11)

The method of claim 11, wherein:
the first set of MCS values comprises a first MCS table; and
the second set of MCS values comprises a second MCS table.

### Claim 13 (depends on 12)

The method of claim 12, wherein:
the first MCS table supports up to a first modulation order; and
the second MCS table supports up to a second modulation order that is different from the first modulation order.

### Claim 14 (depends on 11)

The method of claim 11, wherein the determination of the first minimum value, the first maximum value, the second minimum value, and the second maximum value comprises:
determining a condition of a channel to be used for the peer-to-peer communication; and
selecting the first minimum value, the first maximum value, the second minimum value, and the second maximum value based on the determined condition of the channel.

### Claim 15 (depends on 14)

The method of claim 14, wherein the channel is a peer-to-peer data channel, a sidelink data channel, a vehicle-to-anything data channel, or any combination thereof.

### Claim 16 (depends on 11)

The method of claim 11, wherein the determination of the first minimum value, the first maximum value, the second minimum value, and the second maximum value is based on a condition associated with at least one of the first device or the second device.

### Claim 17 (depends on 16)

The method of claim 16, wherein the condition comprises at least one rate of motion of at least one of the first device or the second device.

### Claim 18

An apparatus for communication comprising:
a memory; and
a processor coupled to the memory,
the processor and the memory configured to:
identify a set of modulation and coding scheme (MCS) values from a plurality of sets of MCS values to use for communication with another apparatus;
identify a set of minimum and maximum values from a plurality of sets of minimum and maximum values to use with the identified set of MCS values; and
communicate with another apparatus, wherein the communication uses the identified set of MCS values and the identified set of minimum and maximum values.

### Claim 19 (depends on 18)

The apparatus of claim 18, further comprising:
receiving the plurality of sets of MCS values.

### Claim 20 (depends on 18)

The apparatus of claim 18, further comprising:
receiving the plurality of sets of minimum and maximum values.

### Claim 21 (depends on 18)

The apparatus of claim 18, wherein the plurality of sets of MCS values comprise a first MCS table and a second MCS table.

### Claim 22 (depends on 21)

The apparatus of claim 21, wherein:
the first MCS table supports up to a first modulation order; and
the second MCS table supports up to a second modulation order that is different from the first modulation order.

### Claim 23 (depends on 21)

The apparatus of claim 21, wherein:
the first MCS table supports up to 16 quadrature amplitude modulation (QAM); and
the second MCS table supports up to 64 QAM.

### Claim 24 (depends on 18)

The apparatus of claim 18, wherein the identification of the set of MCS values is based on a condition associated with the apparatus.

### Claim 25 (depends on 24)

The apparatus of claim 24, wherein the condition comprises a rate of motion of the apparatus.

### Claim 26 (depends on 18)

The apparatus of claim 18, wherein the communication is via a peer-to-peer data channel, a sidelink data channel, a vehicle-to-anything data channel, or any combination thereof.

### Claim 27

A method of communication for an apparatus, comprising:
identifying a set of modulation and coding scheme (MCS) values from a plurality of sets of MCS values to use for communication with another apparatus;
identifying a set of minimum and maximum values from a plurality of sets of minimum and maximum values to use with the identified set of MCS values; and
communicating with another apparatus, wherein the communication uses the identified set of MCS values and the identified set of minimum and maximum values.

### Claim 28 (depends on 27)

The method of claim 27, further comprising:
receiving the plurality of sets of MCS values; and
receiving the plurality of sets of minimum and maximum values.

### Claim 29 (depends on 27)

The method of claim 27, wherein the plurality of sets of MCS values comprise a first MCS table and a second MCS table.

### Claim 30 (depends on 29)

The method of claim 29, wherein:
the first MCS table supports up to a first modulation order; and
the second MCS table supports up to a second modulation order that is different from the first modulation order.

### Claim 31 (depends on 29)

The method of claim 29, wherein:
the first MCS table supports up to 16 quadrature amplitude modulation (QAM); and
the second MCS table supports up to 64 QAM.

### Claim 32 (depends on 27)

The method of claim 27, wherein the identification of the set of MCS values is based on a condition associated with the apparatus.

### Claim 33 (depends on 32)

The method of claim 32, wherein the condition comprises a rate of motion of the apparatus.