# US 12,010,053 B2 · Transport block size (TBS) determination for sidelink communication

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- Number: US 12,010,053 B2
- Document ID: US12010053B2
- Status: Granted
- Kind: B2
- Application number: 17/174,161
- Filed: 2021-02-11
- Published: 2021-06-24
- Granted: 2024-06-11
- Earliest claimed: 2020-02-13
- Assignees: Intel Corporation
- Applicants: Intel Corporation
- Inventors: Alexey Khoryaev; Mikhail Shilov; Sergey Panteleev; Kilian Roth
- Web page: https://patentgrep.com/patent/US12010053B2

## CPC

- H04L 5/0048: {Allocation of pilot signals, i.e. of signals known to the receiver (allocation of control signalling H04L5/0053; use of control signalling H04L5/0091)}
- H04L 5/0051: {of dedicated pilots, i.e. pilots destined for a single user or terminal}
- H04L 5/0053: {Allocation of signalling, i.e. of overhead other than pilot signals}
- H04L 5/0094: {Indication of how sub-channels of the path are allocated}
- H04L 5/06: the signals being represented by different frequencies (combined with time-division multiplexing H04L5/26)
- H04L 27/2602: {Signal structure}
- H04L 27/2613: {Structure of the reference signals}
- H04W 72/02: Selection of wireless resources by user or terminal
- H04W 72/0453: Resources in frequency domain, e.g. a carrier in FDMA
- H04W 72/23: in the downlink direction of a wireless link, i.e. towards a terminal
- H04W 76/14: Direct-mode setup
- 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

Various embodiments herein provide techniques for transport block size (TBS) determination for communication on a physical sidelink shared channel (PSSCH). The embodiments may be used by vehicle-to-everything (V2X) user equipments (UEs). Other embodiments may be described and claimed.

## Claims

### Claim 1

One or more non-transitory, computer-readable media (NTCRM) having instructions, stored thereon, that when executed by one or more processors cause a user equipment (UE) to:
determine a transport block size (TBS) for a physical sidelink shared channel (PSSCH) based on an overhead value per physical resource block (PRB) and, for respective symbols that are allocated for a PSSCH transmission:
a scheduled bandwidth of the PSSCH transmission;
a number of subcarriers in the respective symbol that carry a demodulation reference signal (DMRS); and
a number of subcarriers in the respective symbol that carry a phase-tracking reference signal (PT-RS); and
encode a PSSCH message for transmission based on the determined TBS.

### Claim 2 (depends on 1)

The one or more NTCRM of claim 1, wherein the scheduled bandwidth of the PSSCH transmission is without remainder PRBs.

### Claim 3 (depends on 1)

The one or more NTCRM of claim 1, wherein the instructions, when executed, are further to cause the UE to determine a second stage physical sidelink control channel (PSCCH) resource calculation based on the determined TBS.

### Claim 4 (depends on 3)

The one or more NTCRM of claim 3, wherein the TBS is determined according to:
n
R
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P
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(
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wherein:
MscPSSCH(l) is the scheduled bandwidth of the PSSCH transmission without remainder PRBs;
MscDMRS(l) is the number of subcarriers in orthogonal frequency division multiplexing (OFDM) symbol that carry the DMRS in the PSSCH transmission assuming DMRS configuration with the most amount of resource elements (REs) configured for the resource pool, and assuming that a physical sidelink feedback channel (PSFCH) is present if configured, in all PRBs except remainder PRBs;
MscPT-RS(l) is the number of subcarriers in OFDM symbol l that carry the PT-RS, in the PSSCH transmission in all PRBs except remainder PRBs;
NsymbolPSSCH is a number of allocated symbols for the PSSCH;
NohPRB is the overhead value per PRB overhead value preconfigured; and
nPRB is a number of PRBs allocated to PSSCH excluding remainder PRBs.

### Claim 5 (depends on 1)

The one or more NTCRM of claim 1, wherein the TBS is further determined based on a number of reserved resource elements that are reserved for a second stage physical sidelink control channel (PSCCH).

### Claim 6 (depends on 5)

The one or more NTCRM of claim 5, wherein the TBS is determined according to:
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PSSCH
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DMRS
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where:
MscPSSCH(l) is the scheduled bandwidth of the PSSCH transmission without remainder PRBs;
MscDMRS(l) is the number of subcarriers in orthogonal frequency division multiplexing (OFDM) symbol that carry the DMRS in the PSSCH transmission, assuming DMRS configuration with the most amount of resource elements (REs) configured for the resource pool, and assuming that a physical sidelink feedback channel (PSFCH) is present if configured, in all PRBs except remainder PRBs;
MscPT-RS(l) is the number of subcarriers in OFDM symbol l that carry the PT-RS, in the PSSCH transmission in all PRBs except remainder PRBs;
MSCSCI-2(l) is a number of subcarriers in OFDM symbol l that carry the 2nd stage PSCCH;
NsymbolPSSCH is a number of allocated symbols for the PSSCH;
NchPRB is the overhead value per PRB overhead value preconfigured; and
nPRB is a number of PRBs allocated to PSSCH excluding remainder PRBs.

### Claim 7 (depends on 1)

The one or more NTCRM of claim 1, wherein the number of the symbols that are allocated for the PSSCH is determined based on a determination that a physical sidelink feedback channel is configured and is to be present in all slots.

### Claim 8

An apparatus to be implemented in a user equipment (UE), the apparatus comprising:
a radio frequency (RF) interface; and
processing circuitry coupled to the RF interface, the processing circuitry to:
determine a transport block size (TBS) for a physical sidelink shared channel (PSSCH) based on an overhead value per physical resource block (PRB) and, for respective symbols that are allocated for a PSSCH transmission:
a scheduled bandwidth of the PSSCH transmission;
a number of subcarriers in the respective symbol that carry a demodulation reference signal (DMRS); and
a number of subcarriers in the respective symbol that carry a phase-tracking reference signal (PT-RS); and
encode, based on the determined TBS, a PSSCH message for transmission via the RF interface.

### Claim 9 (depends on 8)

The apparatus of claim 8, wherein the scheduled bandwidth of the PSSCH transmission is without remainder PRBs.

### Claim 10 (depends on 8)

The apparatus of claim 8, wherein the processing circuitry is further to determine a second stage physical sidelink control channel (PSCCH) resource calculation based on the determined TBS.

### Claim 11 (depends on 10)

The apparatus of claim 10, wherein the TBS is determined according to:
n
R
⁢
E
=
(
∑
l
=
1
N
s
⁢
y
⁢
mbol
P
⁢
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(
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⁢
h
P
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R
⁢
B
⁢
n
P
⁢
R
⁢
B
wherein:
MscPSSCH(l) is the scheduled bandwidth of the PSSCH transmission without remainder PRBs;
MscDMRS(l) is the number of subcarriers in orthogonal frequency division multiplexing (OFDM) symbol l that carry the DMRS in the PSSCH transmission, assuming DMRS configuration with the most amount of resource elements (REs) configured for the resource pool, and assuming that a physical sidelink feedback channel (PSFCH) is present if configured, in all PRBs except remainder PRBs;
MscPT-RS(l) is the number of subcarriers in OFDM symbol that carry the PT-RS, in the PSSCH transmission in all PRBs except remainder PRBs;
NsymbolPSSCH is a number of allocated symbols for the PSSCH;
NohPRB is the overhead value per PRB overhead value preconfigured; and
nPRB is a number of PRBs allocated to PSSCH excluding remainder PRBs.

### Claim 12 (depends on 8)

The apparatus of claim 8, wherein the TBS is further determined based on a number of reserved resource elements that are reserved for a second stage physical sidelink control channel (PSCCH).

### Claim 13 (depends on 12)

The apparatus of claim 12, wherein the TBS is determined according to:
n
R
⁢
E
=
(
∑
l
=
1
N
s
⁢
y
⁢
mbol
P
⁢
S
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C
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-
1
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PSSCH
(
l
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-
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S
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C
DMRS
(
l
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-
M
S
⁢
C
P
⁢
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(
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SCI
-
2
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-
N
o
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h
P
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R
⁢
B
⁢
n
P
⁢
R
⁢
B
where:
MscPSSCH(l) is the scheduled bandwidth of the PSSCH transmission without remainder PRBs;
MscDMRS(l) is the number of subcarriers in orthogonal frequency division multiplexing (OFDM) symbol l that carry the DMRS in the PSSCH transmission, assuming DMRS configuration with the most amount of resource elements (REs) configured for the resource pool, and assuming that a physical sidelink feedback channel (PSFCH) is present if configured, in all PRBs except remainder PRBs;
MscPT-RS(l) is the number of subcarriers in OFDM symbol l that carry the PT-RS, in the PSSCH transmission in all PRBs except remainder PRBs;
MscPT-RS(l) is a number of subcarriers in OFDM symbol l that carry the 2nd stage PSCCH;
NsymbolPSSCH is a number of allocated symbols for the PSSCH;
NohPRB is the overhead value per PRB overhead value preconfigured; and
nPRB is a number of PRBs allocated to PSSCH excluding remainder PRBs.

### Claim 14 (depends on 8)

The apparatus of claim 8, wherein the number of the symbols that are allocated for the PSSCH is determined based on a determination that a physical sidelink feedback channel is configured and is to be present in all slots.