# US 10,772,054 B2 · Method for receiving SSB according to synchronization raster and user equipment

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- Number: US 10,772,054 B2
- Document ID: US10772054B2
- Status: Granted
- Kind: B2
- Application number: 16/250,988
- Filed: 2019-01-17
- Published: 2019-05-23
- Granted: 2020-09-08
- Earliest claimed: 2017-09-11
- Assignees: LG Electronics Inc.
- Applicants: LG Electronics Inc.
- Inventors: Manyoung Jung; Hyunsoo Ko; Yoonoh Yang; Sangwook Lee; Suhwan Lim; Jinyup Hwang
- Web page: https://patentgrep.com/patent/US10772054B2

## CPC

- H04W 56/0005: {synchronizing of arrival of multiple uplinks}
- 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)}
- H04W 56/006: {using known positions of transmitter and receiver}
- H04J 11/0073: {Acquisition of primary synchronisation channel, e.g. detection of cell-ID within cell-ID group}
- H04J 11/0076: {Acquisition of secondary synchronisation channel, e.g. detection of cell-ID group}
- H04J 2011/0096: {Network synchronisation}
- H04J 2211/005: Long term evolution [LTE]
- 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)

## Abstract

One disclosure of this specification provides a method for receiving a synchronization signal block (SSB) by a user equipment (UE). The method may include: determining frequency locations of multiple SSBs; and receiving at least one SSB among the multiple SSBs. The multiple SSBs may be configured to be arranged spaced apart from each other by a predetermined offset. The at least one SSB may be located at an interval of 1.2 MHz on a frequency axis.

## Claims

### Claim 1

A method performed by a user equipment (UE) in a new radio (NR) system, the method comprising:
receiving, from a NR cell of a base station, a synchronization signal block (SSB) at a frequency position; and
performing an initial access procedure for the NR cell of the base station based on the received SSB,
wherein the frequency position of the SSB received from the NR cell exists in a NR band which is re-farmed from a long term evolution (LTE),
wherein the NR band uses a channel raster of 100 kHz and the SSB uses a subcarrier spacing of 15 kHz,
wherein the frequency position of the SSB is one of (i) a first plurality of frequency positions that are equally spaced apart by 1.2 MHz, (ii) a second plurality of frequency positions that are equally spaced apart by 1.2 MHz, or (iii) a third plurality of frequency positions that are equally spaced apart by 1.2 MHz, and
wherein the second plurality of frequency positions is shifted by 100 kHz relative to the first plurality of frequency positions, the third plurality of frequency positions is shifted by 100 kHz relative to the second plurality of frequency positions, and the third plurality of frequency positions is shifted by 200 kHz relative to the first plurality of frequency positions.

### Claim 2 (depends on 1)

The method of claim 1, wherein the SSB is not located in a center frequency of a cell.

### Claim 3 (depends on 1)

The method of claim 1, wherein each of the first plurality of frequency positions, the second plurality of frequency positions, and the third plurality of frequency positions is defined by a respective synchronization raster.

### Claim 4 (depends on 3)

The method of claim 3, wherein for each of the first plurality of frequency positions, the second plurality of frequency positions, and the third plurality of frequency positions, the respective synchronization raster is different from the channel raster.

### Claim 5 (depends on 1)

The method of claim 1, wherein the SSB comprises a primary synchronization signal (PSS), a secondary synchronization signal (SSS), and a physical broadcast channel (PBCH).

### Claim 6

A user equipment (UE) configured to operate in a new radio (NR) system, the UE comprising:
a transceiver;
at least one processor; and
at least one computer memory operably connectable to the at least one processor and storing instructions that, when executed by the at least one processor, perform operations comprising:
receiving, from a NR cell of a base station, a synchronization signal block (SSB) at a frequency position; and
performing an initial access procedure for the NR cell of the base station based on the received SSB,
wherein the frequency position of the SSB received from the NR cell exists in a NR band which is re-farmed from a long term evolution (LTE),
wherein the NR band uses a channel raster of 100 kHz and the SSB uses a subcarrier spacing of 15 kHz,
wherein the frequency position of the SSB is one of (i) a first plurality of frequency positions that are equally spaced apart by 1.2 MHz, (ii) a second plurality of frequency positions that are equally spaced apart by 1.2 MHz, or (iii) a third plurality of frequency positions that are equally spaced apart by 1.2 MHz, and
wherein the second plurality of frequency positions is shifted by 100 kHz relative to the first plurality of frequency positions, the third plurality of frequency positions is shifted by 100 kHz relative to the second plurality of frequency positions, and the third plurality of frequency positions is shifted by 200 kHz relative to the first plurality of frequency positions.

### Claim 7 (depends on 6)

The UE of claim 6, wherein the SSB is not located in a center frequency of a cell.

### Claim 8 (depends on 6)

The UE of claim 6, wherein each of the first plurality of frequency positions, the second plurality of frequency positions, and the third plurality of frequency positions is defined by a respective synchronization raster.

### Claim 9 (depends on 8)

The UE of claim 8, wherein for each of the first plurality of frequency positions, the second plurality of frequency positions, and the third plurality of frequency positions, the respective synchronization raster is different from the channel raster.

### Claim 10 (depends on 6)

The UE of claim 6, wherein the SSB comprises a primary synchronization signal (PSS), a secondary synchronization signal (SSS), and a physical broadcast channel (PBCH).

### Claim 11

A processing device configured to control a user equipment (UE) to operate in a new radio (NR) system, the processing device comprising:
at least one processor; and
at least one computer memory operably connectable to the at least one processor and storing instructions that, when executed by the at least one processor, perform operations comprising:
receiving, from a NR cell of a base station, a synchronization signal block (SSB) at a frequency position; and
performing an initial access procedure for the NR cell of the base station based on the received SSB,
wherein the frequency position of the SSB received from the NR cell exists in a NR band which is re-farmed from a long term evolution (LTE),
wherein the NR band uses a channel raster of 100 kHz and the SSB uses a subcarrier spacing of 15 kHz,
wherein the frequency position of the SSB is one of (i) a first plurality of frequency positions that are equally spaced apart by 1.2 MHz, (ii) a second plurality of frequency positions that are equally spaced apart by 1.2 MHz, or (iii) a third plurality of frequency positions that are equally spaced apart by 1.2 MHz, and
wherein the second plurality of frequency positions is shifted by 100 kHz relative to the first plurality of frequency positions, the third plurality of frequency positions is shifted by 100 kHz relative to the second plurality of frequency positions, and the third plurality of frequency positions is shifted by 200 kHz relative to the first plurality of frequency positions.

### Claim 12 (depends on 11)

The processing device of claim 11, wherein the SSB is not located in a center frequency of a cell.

### Claim 13 (depends on 11)

The processing device of claim 11, wherein each of the first plurality of frequency positions, the second plurality of frequency positions, and the third plurality of frequency positions is defined by a respective synchronization raster.

### Claim 14 (depends on 13)

The processing device of claim 13, wherein for each of the first plurality of frequency positions, the second plurality of frequency positions, and the third plurality of frequency positions, the respective synchronization raster is different from the channel raster.

### Claim 15 (depends on 11)

The processing device of claim 11, wherein the SSB comprises a primary synchronization signal (PSS), a secondary synchronization signal (SSS), and a physical broadcast channel (PBCH).
