# US 12,225,486 B2 · Method and apparatus for NR sidelink SS/PBCH block

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- Number: US 12,225,486 B2
- Document ID: US12225486B2
- Status: Granted
- Kind: B2
- Application number: 18/399,604
- Filed: 2023-12-28
- Published: 2024-07-11
- Granted: 2025-02-11
- Earliest claimed: 2018-07-06
- Assignees: Samsung Electronics Co., Ltd.
- Applicants: Samsung Electronics Co., Ltd.
- Inventors: Hongbo Si; Li Guo
- Web page: https://patentgrep.com/patent/US12225486B2

## CPC

- H04W 56/0015: {one node acting as a reference for the others}
- H04J 11/0069: {Cell search, i.e. determining cell identity [cell-ID] (design of multiplexing codes H04J13/00; processing access restriction or access information H04W48/16; discovery of network devices for network data management H04W8/005; sounding signals for channel estimation H04L25/0226; structure of reference signals in multicarrier modulation systems H04L27/2613; frame, time or carrier synchronisation in multicarrier modulation systems H04L27/2655)}
- H04J 13/0029: {Gold}
- H04L 25/03866: {using scrambling}
- H04L 27/2602: {Signal structure}
- H04L 27/26025: {Numerology, i.e. varying one or more of symbol duration, subcarrier spacing, Fourier transform size, sampling rate or down-clocking (allocating sub-channels of the transmission path H04L5/003)}
- H04L 27/2613: {Structure of the reference signals}
- H04W 72/02: Selection of wireless resources by user or terminal
- H04W 72/044: based on the type of the allocated resource
- H04W 72/20: Control channels or signalling for resource management
- H04W 76/14: Direct-mode setup
- 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 27/2614: {Peak power aspects}
- H04L 27/2655: {Synchronisation arrangements}
- H04W 76/40: for selective distribution or broadcast
- H04W 92/18: between terminal devices
- H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72)
- H04J: MULTIPLEX COMMUNICATION (transmission in general H04B; peculiar to transmission of digital information H04L5/00; systems for the simultaneous or sequential transmission of more than one television signal H04N7/08; in exchanges H04Q11/00; stereophonic systems H04S)
- H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M)

## Abstract

A method of a first UE comprises: determining a sidelink synchronization identity (SL-SID) and a set of resources; generating at least one sidelink synchronization signal and physical broadcast channel (S-SSB) based on the SL-SID and the set of resources, wherein each S-SSB of the at least one S-SSB includes first two symbols for a sidelink primary synchronization signal (S-PSS) and second two symbols for a sidelink secondary synchronization signal (S-SSS); generating a first sequence corresponding to the S-PSS, wherein the first sequence is determined based on a binary phase shift keying (BPSK) modulated M-sequence with a 127 of sequence length and a low cross-correlation with a PSS; generating a second sequence corresponding to the S-SSS, wherein the second sequence is determined based on a BPSK modulated Gold-sequence with a 127 of sequence length; and transmitting, the at least one S-SSB over sidelink channels established with the second UE.

## Claims

### Claim 1

A first user equipment (UE) in a wireless communication system, the first UE comprising:
a processor configured to:
identify a sidelink-primary synchronization signal (S-PSS) based on a first sequence and a sidelink-secondary synchronization signal (S-SSS) based on a second sequence, and
identify a physical sidelink broadcast channel (PSBCH) and a demodulation reference signal (DMRS) for the PSBCH; and
a transceiver operably coupled to the processor, the transceiver configured to transmit, to a second UE, a sidelink-synchronization signal and physical broadcast channel block (S-SSB) including the S-PSS, the S-SSS, the PSBCH, and the DMRS for the PSBCH,
wherein the S-SSB includes two symbols for the S-PSS and two symbols for the S-SSS,
wherein the second sequence for the S-SSS (dS-SSS) is defined by:
d
S
-
SSS
(
n
)
=
(
1
-
2
*
x
0
(
n
0
)
)
*
(
1
-
2
*
x
1
(
n
1
)
)
,
n
0
=
(
n
+
m
0
)
⁢
mod
⁢
127
,
n
1
=
(
n
+
m
1
)
⁢
mod
⁢
127
,
m
0
=
15
*
⌊
N
ID
/
112
⌋
+
5
*
N
GID
SL
,
m
1
=
N
ID
⁢
mod
⁢
112
,
and
0
≤
n
<
1
⁢
2
⁢
7
,
wherein NGIDSL is a sidelink synchronization identity and NGIDSL is 1 or 0.

### Claim 2 (depends on 1)

The first UE of claim 1, wherein:
the two symbols for the S-PSS are second and third symbols in the S-SSB,
the two symbols for the S-SSS are fourth and fifth symbols in the S-SSB,
a symbol for the PSBCH and the DMRS for the PSBCH is a first symbol in the S-SSB, and
symbols for the PSBCH and the DMRS for the PSBCH are sixth and subsequent symbols in the S-SSB.

### Claim 3 (depends on 1)

The first UE of claim 1, wherein:
a length of the first sequence is 127, and
a length of the second sequence is 127.

### Claim 4 (depends on 1)

The first UE of claim 1, wherein the first sequence for the S-PSS is defined by dS-PSS(n)=1−2*x(m), m=(n+43*NGIDSL+22) mod 127, 0≤n<127.

### Claim 5

A method performed by a first user equipment (UE) in a wireless communication system, the method comprising:
identifying a sidelink-primary synchronization signal (S-PSS) based on a first sequence and a sidelink-secondary synchronization signal (S-SSS) based on a second sequence;
identifying a physical sidelink broadcast channel (PSBCH) and a demodulation reference signal (DMRS) for the PSBCH;
transmitting, to a second UE, a sidelink-synchronization signal and physical broadcast channel block (S-SSB) including the S-PSS, the S-SSS, the PSBCH, and the DMRS for the PSBCH over sidelink channels,
wherein the S-SSB includes two symbols for the S-PSS and two symbols for the S-SSS,
wherein the second sequence for the S-SSS (dS-SSS) is defined by:
d
S
-
SSS
(
n
)
=
(
1
-
2
*
x
0
(
n
0
)
)
*
(
1
-
2
*
x
1
(
n
1
)
)
,
n
0
=
(
n
+
m
0
)
⁢
mod
⁢
127
,
n
1
=
(
n
+
m
1
)
⁢
mod
⁢
127
,
m
0
=
15
*
⌊
N
ID
/
112
⌋
+
5
*
N
GID
SL
,
m
1
=
N
ID
⁢
mod
⁢
112
,
and
0
≤
n
<
1
⁢
2
⁢
7
,
and
wherein NGIDSL is a sidelink synchronization identity and NGIDSL is 1 or 0.

### Claim 6 (depends on 5)

The method of claim 5, wherein:
the two symbols for the S-PSS are second and third symbols in the S-SSB,
the two symbols for the S-SSS are fourth and fifth symbols in the S-SSB,
a symbol for the PSBCH and the DMRS for the PSBCH is a first symbol in the S-SSB, and
symbols for the PSBCH and the DMRS for the PSBCH are sixth and subsequent symbols in the S-SSB.

### Claim 7 (depends on 5)

The method of claim 5, wherein:
a length of the first sequence is 127, and
a length of the second sequence is 127.

### Claim 8 (depends on 5)

The method of claim 5, wherein the first sequence for the S-PSS is defined by dS-PSS(n)=1−2*x(m), m=(n+43*NGIDSL+22) mod 127, 0≤n<127.