# US 12,764,758 B2 · Downlink control information size alignment for scheduling uplink transmission

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- Number: US 12,764,758 B2
- Document ID: US12764758B2
- Status: Granted
- Kind: B2
- Application number: 18/585,963
- Filed: 2024-02-23
- Published: 2024-10-10
- Granted: 2026-10-13
- Earliest claimed: 2023-04-06
- Assignees: QUALCOMM Incorporated
- Applicants: QUALCOMM Incorporated
- Inventors: Mostafa Khoshnevisan; Yitao Chen; Gokul Sridharan
- Web page: https://patentgrep.com/patent/US12764758B2

## CPC

- H04W 72/232: the control data signalling from the physical layer, e.g. DCI signalling
- H04L 5/0007: {the frequencies being orthogonal, e.g. OFDM(A) or DMT}
- H04L 5/005: {of common pilots, i.e. pilots destined for multiple users or terminals}
- H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72)
- H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M)

## Abstract

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive, from a network node, a downlink control information (DCI) message that schedules a physical uplink shared channel (PUSCH) transmission, wherein the DCI message includes: a waveform selection field that indicates a waveform type associated with the PUSCH transmission, and a sounding reference signal (SRS) resource set indication field that indicates a multiple transmission reception point (mTRP) transmission mode or a single transmission reception point (sTRP) transmission mode associated with the PUSCH transmission. The UE may decode the DCI message based on one or more zero padding types associated with one or more fields in the DCI message that depend on one or more of a value of the waveform selection field or a value of the SRS resource set indication field. Numerous other aspects are described.

## Claims

### Claim 1

A method of wireless communication performed by a user equipment (UE), comprising:
receiving, from a network node, a downlink control information (DCI) message that schedules a physical uplink shared channel (PUSCH) transmission, wherein the DCI message has a fixed size based on one or more zero padding types of a plurality of zero padding types, and wherein the DCI message includes:
a waveform selection field that indicates a waveform type associated with the PUSCH transmission, and
a sounding reference signal (SRS) resource set indication field that indicates a multiple transmission reception point (mTRP) transmission mode or a single transmission reception point (sTRP) transmission mode associated with the PUSCH transmission; and
decoding the DCI message based on the one or more zero padding types associated with one or more fields in the DCI message that depend on one or more of a value of the waveform selection field or a value of the SRS resource set indication field.

### Claim 2 (depends on 1)

The method of claim 1, wherein:
the waveform selection field indicates whether the waveform type associated with the PUSCH transmission is a cyclic prefix orthogonal frequency division multiplexing (CP-OFDM) waveform or a discrete Fourier transform spread orthogonal frequency division multiplexing (DFT-s-OFDM) waveform, and
the SRS resource set indication field indicates whether the PUSCH transmission is associated with a single frequency network (SFN) mTRP transmission mode or the sTRP transmission mode.

### Claim 3 (depends on 2)

The method of claim 2, wherein each field in the DCI message that depends on both the value of the waveform selection field and the value of the SRS resource set indication field has a size corresponding to a maximum size for the field based on the one or more zero padding types including a per DCI field alignment applied to the waveform selection field and the SRS resource set indication field.

### Claim 4 (depends on 2)

The method of claim 2, wherein the fixed size of the DCI message corresponds to a maximum size for the DCI message based on the one or more zero padding types including a per DCI format alignment applied to the waveform selection field and the SRS resource set indication field.

### Claim 5 (depends on 2)

The method of claim 2, wherein the one or more zero padding types include:
a per DCI field alignment applied to each field in the DCI message that has a size that depends on the value of the waveform selection field, and
a per DCI format alignment applied to the DCI message based on the DCI having one or more fields that have sizes that depend on a value of the SRS resource set indication field.

### Claim 6 (depends on 2)

The method of claim 2, wherein the one or more zero padding types include:
a per DCI field alignment applied to each field in the DCI message that has a size that depends on the value of the SRS resource set indication field, and
a per DCI format alignment applied to the DCI message based on the DCI having one or more fields that have sizes that depend on a value of the waveform selection field.

### Claim 7 (depends on 1)

The method of claim 1, wherein:
the SRS resource set indication field indicates whether the PUSCH transmission is associated with a spatial division multiplexing (SDM) mTRP transmission mode or the sTRP transmission mode, and
the waveform selection field indicates:
that the waveform type associated with the PUSCH transmission is a cyclic prefix orthogonal frequency division multiplexing (CP-OFDM) waveform based on the SRS resource set indication field indicating that the PUSCH transmission is associated with the SDM mTRP transmission mode, or
whether the waveform type associated with the PUSCH transmission is the CP-OFDM waveform or a discrete Fourier transform spread orthogonal frequency division multiplexing (DFT-s-OFDM) waveform based on the SRS resource set indication field indicating that the PUSCH transmission is associated with the sTRP transmission mode.

### Claim 8 (depends on 7)

The method of claim 7, wherein a size of each field in the DCI message that depends on the value of the waveform selection field and the value of the SRS resource set indication field has a size corresponding to a maximum size for the field based on the one or more zero padding types including a per DCI field alignment applied to the waveform selection field and the SRS resource set indication field.

### Claim 9 (depends on 7)

The method of claim 7, wherein a size of the DCI message corresponds to a maximum size for the DCI message based on the one or more zero padding types including a per DCI format alignment applied to the waveform selection field and the SRS resource set indication field.

### Claim 10 (depends on 7)

The method of claim 7, wherein the one or more zero padding types include:
a per DCI field alignment applied to each field in the DCI message that has a size that depends on the value of the waveform selection field, and
a per DCI format alignment applied to the DCI message based on the DCI having one or more fields that have sizes that depend on a value of the SRS resource set indication field.

### Claim 11 (depends on 7)

The method of claim 7, wherein the one or more zero padding types include:
a per DCI field alignment applied to each field in the DCI message that has a size that depends on the value of the SRS resource set indication field, and
a per DCI format alignment applied to the DCI message based on the DCI having one or more fields that have sizes that depend on a value of the waveform selection field.

### Claim 12 (depends on 1)

The method of claim 1, wherein:
the SRS resource set indication field indicates whether the PUSCH transmission is associated with the mTRP transmission mode or the sTRP transmission mode, and
the DCI message includes a cyclic redundancy check (CRC) scrambled by a cell radio network temporary identifier (C-RNTI) or a configured scheduling radio network temporary identifier (CS-RNTI).

### Claim 13 (depends on 12)

The method of claim 12, wherein a size of each field in the DCI message that depends on whether the CRC of the DCI message is scrambled by the C-RNTI or the CS-RNTI and depends on the value of the SRS resource set indication field has a size corresponding to a maximum size for the field based on the one or more zero padding types including a per DCI field alignment.

### Claim 14 (depends on 12)

The method of claim 12, wherein the one or more zero padding types include:
a per DCI field alignment applied to each field in the DCI message that has a size that depends on whether the CRC of the DCI message is scrambled by the C-RNTI or the CS-RNTI, and
a per DCI format alignment applied to the DCI message based on the DCI having one or more fields that have sizes that depend on a value of the SRS resource set indication field.

### Claim 15 (depends on 1)

The method of claim 1, further comprising:
transmitting, to the network node, signaling that indicates a capability to support one or more of dynamic waveform switching or dynamic switching between the mTRP transmission mode and the sTRP transmission mode based on a zero padding type associated with the DCI message, wherein the one or more zero padding types associated with the one or more fields in the DCI message are based on the capability.

### Claim 16 (depends on 1)

The method of claim 1, further comprising:
transmitting, to the network node, signaling that indicates a capability to jointly support dynamic waveform switching and dynamic switching between the mTRP transmission mode and the sTRP transmission mode, wherein the one or more zero padding types associated with the one or more fields in the DCI message are based on the capability.

### Claim 17 (depends on 1)

The method of claim 1, further comprising:
transmitting, to the network node, signaling that indicates a capability to jointly support dynamic waveform switching and dynamic switching between the mTRP transmission mode and the sTRP transmission mode based on a first zero padding type of the plurality of zero padding types being used for the waveform selection field and a second zero padding type of the plurality of zero padding types being used for the SRS resource set indication field, wherein the one or more zero padding types associated with the one or more fields in the DCI message are based on the capability.

### Claim 18 (depends on 1)

The method of claim 1, wherein the plurality of zero padding types includes a first zero padding type and a second zero padding type, the first zero padding type associated with a per DCI field alignment and the second zero padding type associated with a per DCI format alignment.

### Claim 19

A method of wireless communication performed by a network node, comprising:
generating a downlink control information (DCI) message, wherein the DCI message has a fixed size based on one or more zero padding types of a plurality of zero padding types, and wherein the DCI message includes:
a waveform selection field that indicates a waveform type associated with a physical uplink shared channel (PUSCH) transmission, and
a sounding reference signal (SRS) resource set indication field that indicates a multiple transmission reception point (mTRP) transmission mode or a single transmission reception point (sTRP) transmission mode associated with the PUSCH transmission; and
transmitting the DCI message to a user equipment (UE), wherein one or more fields in the DCI message are associated with one or more zero padding types based on one or more of a value of the waveform selection field or a value of the SRS resource set indication field.

### Claim 20 (depends on 19)

The method of claim 19, wherein:
the waveform selection field indicates whether the waveform type associated with the PUSCH transmission is a cyclic prefix orthogonal frequency division multiplexing (CP-OFDM) waveform or a discrete Fourier transform spread orthogonal frequency division multiplexing (DFT-s-OFDM) waveform, and
the SRS resource set indication field indicates whether the PUSCH transmission is associated with a single frequency network (SFN) mTRP transmission mode or the sTRP transmission mode.

### Claim 21 (depends on 20)

The method of claim 20, wherein each field in the DCI message that depends on both the value of the waveform selection field and the value of the SRS resource set indication field has a size corresponding to a maximum size for the field based on the one or more zero padding types including a per DCI field alignment applied to the waveform selection field and the SRS resource set indication field.

### Claim 22 (depends on 20)

The method of claim 20, wherein the fixed size of the DCI message corresponds to a maximum size for the DCI message based on the one or more zero padding types including a per DCI format alignment applied to the waveform selection field and the SRS resource set indication field.

### Claim 23 (depends on 19)

The method of claim 19, wherein:
the SRS resource set indication field indicates whether the PUSCH transmission is associated with a spatial division multiplexing (SDM) mTRP transmission mode or the sTRP transmission mode, and
the waveform selection field indicates:
that the waveform type associated with the PUSCH transmission is a cyclic prefix orthogonal frequency division multiplexing (CP-OFDM) waveform based on the SRS resource set indication field indicating that the PUSCH transmission is associated with the SDM mTRP transmission mode, or
whether the waveform type associated with the PUSCH transmission is the CP-OFDM waveform or a discrete Fourier transform spread orthogonal frequency division multiplexing (DFT-s-OFDM) waveform based on the SRS resource set indication field indicating that the PUSCH transmission is associated with the sTRP transmission mode.

### Claim 24 (depends on 23)

The method of claim 23, wherein a size of each field in the DCI message that depends on the value of the waveform selection field and the value of the SRS resource set indication field has a size corresponding to a maximum size for the field based on the one or more zero padding types including a per DCI field alignment applied to the waveform selection field and the SRS resource set indication field.

### Claim 25 (depends on 23)

The method of claim 23, wherein a size of the DCI message corresponds to a maximum size for the DCI message based on the one or more zero padding types including a per DCI format alignment applied to the waveform selection field and the SRS resource set indication field.

### Claim 26 (depends on 23)

The method of claim 23, wherein:
the SRS resource set indication field indicates whether the PUSCH transmission is associated with the mTRP transmission mode or the sTRP transmission mode, and
the DCI message includes a cyclic redundancy check (CRC) scrambled by a cell radio network temporary identifier (C-RNTI) or a configured scheduling radio network temporary identifier (CS-RNTI).

### Claim 27 (depends on 19)

The method of claim 19, further comprising:
receiving, from the UE, signaling that indicates a capability to support one or more of dynamic waveform switching or dynamic switching between the mTRP transmission mode and the sTRP transmission mode based on a zero padding type associated with the DCI message, wherein the one or more zero padding types associated with the one or more fields in the DCI message are based on the capability.

### Claim 28 (depends on 19)

The method of claim 19, further comprising:
receiving, from the UE, signaling that indicates a capability to jointly support dynamic waveform switching and dynamic switching between the mTRP transmission mode and the sTRP transmission mode, wherein the one or more zero padding types associated with the one or more fields in the DCI message are based on the capability.

### Claim 29

A user equipment (UE) for wireless communication, comprising:
a memory; and
one or more processors, coupled to the memory, configured to:
receive, from a network node, a downlink control information (DCI) message that schedules a physical uplink shared channel (PUSCH) transmission, wherein the DCI message has a fixed size based on one or more zero padding types of a plurality of zero padding types, and wherein the DCI message includes:
a waveform selection field that indicates a waveform type associated with the PUSCH transmission, and
a sounding reference signal (SRS) resource set indication field that indicates a multiple transmission reception point (mTRP) transmission mode or a single transmission reception point (sTRP) transmission mode associated with the PUSCH transmission; and
decode the DCI message based on the one or more zero padding types associated with one or more fields in the DCI message that depend on one or more of a value of the waveform selection field or a value of the SRS resource set indication field.

### Claim 30

A network node for wireless communication, comprising:
a memory; and
one or more processors, coupled to the memory, configured to:
generate a downlink control information (DCI) message, wherein the DCI message has a fixed size based on one or more zero padding types of a plurality of zero padding types, and wherein the DCI message includes:
a waveform selection field that indicates a waveform type associated with
a physical uplink shared channel (PUSCH) transmission, and
a sounding reference signal (SRS) resource set indication field that indicates a multiple transmission reception point (mTRP) transmission mode or a single transmission reception point (sTRP) transmission mode associated with the PUSCH transmission; and
transmit the DCI message to a user equipment (UE), wherein one or more fields in the DCI message are associated with one or more zero padding types based on one or more of a value of the waveform selection field or a value of the SRS resource set indication field.