Method and apparatus for synchronization signal design

Patent metadata

Field	Value
Publication number	US-2020382353-A1
Application number	US-202016947961-A
Country	US
Kind code	A1
Filing date	Aug 25, 2020
Priority date	Nov 3, 2016
Publication date	Dec 3, 2020
Grant date	—

Abstract

A method of a base station (BS) for transmitting synchronization signals in a wireless communication system. The method comprises generating a primary synchronization signal (PSS) including one of multiple PSS sequences that is generated based on a M-sequence of length 127 in a frequency domain, wherein the PSS indicates part of cell identification (ID) information using a cyclic shift performed on the M-sequence generating the PSS; generating a secondary synchronization signal (SSS) including one of multiple SSS sequences that is generated based on multiple BPSK modulated M-sequences of length 127 in the frequency domain, wherein the SSS indicates the cell ID information using cyclic shifts performed on the M-sequences generating the SSS; and transmitting, to a user equipment (UE), the PSS and SSS over downlink channels.

First claim

What is claimed is:

1 . Abase station for transmitting synchronization signals in a wireless communication system, the base station comprising:
at least one processor configured to:
obtain a primary synchronization signal (PSS) including one PSS sequence that is associated with a first sequence of length 127, wherein a part of physical cell identification (ID) information is indicated by the one PSS sequence, wherein the one PSS sequence is mapped on to consecutive subcarriers in one OFDM symbol, and
obtain a secondary synchronization signal (SSS) including one SSS sequence that is defined by combination between a second sequence and a third sequence of length 127, wherein the physical cell ID information is indicated by the SSS sequence; and
a transceiver configured to transmit, to a user equipment (UE), the PSS and the SSS over a frequency position for the PSS and the SSS, wherein the PSS is place onto different OFDM symbol from the SSS and a physical broadcast channel (PBCH), wherein the PSS and the SSS are placed on only a part of resource elements available for the PBCH, and wherein a bandwidth for the PSS is same as a bandwidth for the SSS.

2 . The base station of claim 1 , wherein the second sequence and the third sequence are M-sequences.

3 . The base station of claim 1 , wherein the PSS is applicable for all frequency band associated with new radio (NR).

4 . The base station of claim 1 , wherein a size of a frequency band for the PSS is proportional to a size of subcarrier spacing.

5 . The base station of claim 1 , wherein PSS sequence is defined based on a first cyclic shift of the first sequence,
wherein the part of physical cell ID information is indicated by the first cyclic shift, wherein SSS sequence is defined based on a second cyclic shift of the second sequence and a third cyclic shift of the third cyclic shift, wherein the physical cell ID information is indicated by at least one of the second cyclic shift and the third cyclic shift, and wherein the first sequence and the second sequence are defined by same polynomial.

6 . A method for transmitting synchronization signals performed by a base station in a wireless communication system, the method comprising:
obtaining a primary synchronization signal (PSS) including one PSS sequence that is associated with a first sequence of length 127, wherein a part of physical cell identification (ID) information is indicated by the one PSS sequence, wherein the one PSS sequence is mapped on to consecutive subcarriers in one OFDM symbol; obtaining a secondary synchronization signal (SSS) including one SSS sequence that is defined by combination between a second sequence and a third sequence of length 127, wherein the physical cell ID information is indicated by the SSS sequence; and transmitting, to a user equipment (UE), the PSS and the SSS over a frequency position for the PSS and the SSS, wherein the PSS is place onto different OFDM symbol from the SSS and a physical broadcast channel (PBCH), wherein the PSS and the SSS are placed on only a part of resource elements available for the PBCH, and wherein a bandwidth for the PSS is same as a bandwidth for the SSS.

7 . The method of claim 6 , wherein the second sequence and the third sequence are M-sequences.

8 . The method of claim 6 , wherein the PSS is applicable for all frequency band associated with new radio (NR).

9 . The method of claim 6 , wherein a size of a frequency band for the PSS is proportional to a size of subcarrier spacing.

10 . The method of claim 6 , wherein PSS sequence is defined based on a first cyclic shift of the first sequence,
wherein the part of physical cell ID information is indicated by the first cyclic shift, wherein SSS sequence is defined based on a second cyclic shift of the second sequence and a third cyclic shift of the third cyclic shift, wherein the physical cell ID information is indicated by at least one of the second cyclic shift and the third cyclic shift, and wherein the first sequence and the second sequence are defined by same polynomial.

11 . A user equipment (UE) for receiving synchronization signals in a wireless communication system, the UE comprising:
a transceiver configured to receive, from a base station, a primary synchronization signal (PSS) and a secondary synchronization signal (SSS) over a frequency position for the PSS and the SSS; and at least one processor coupled with the transceiver and configured to:
identify the PSS including one PSS sequence that is associated with a first sequence of length 127, wherein a part of physical cell identification (ID) information is indicated by the one PSS sequence, wherein the one PSS sequence is mapped on to consecutive subcarriers in one OFDM symbol, and
identify the SSS including one SSS sequence that is defined by combination between a second sequence and a third sequence of length 127, wherein the physical cell ID information is indicated by the SSS sequence,
wherein the PSS is place onto different OFDM symbol from the SSS and a physical broadcast channel (PBCH), wherein the PSS and the SSS are placed on only a part of resource elements available for the PBCH, and wherein a bandwidth for the PSS is same as a bandwidth for the SSS.

12 . The UE of claim 11 , wherein the second sequence and the third sequence are M-sequences.

13 . The UE of claim 11 , wherein the PSS is applicable for all frequency band associated with new radio (NR).

14 . The UE of claim 11 , wherein a size of a frequency band for the PSS is proportional to a size of subcarrier spacing.

15 . The UE of claim 11 , wherein PSS sequence is defined based on a first cyclic shift of the first sequence,
wherein the part of physical cell ID information is indicated by the first cyclic shift, wherein SSS sequence is defined based on a second cyclic shift of the second sequence and a third cyclic shift of the third cyclic shift, wherein the physical cell ID information is indicated by at least one of the second cyclic shift and the third cyclic shift, and wherein the first sequence and the second sequence are defined by same polynomial.

16 . A method for receiving synchronization signals performed by a user equipment (UE) in a wireless communication system, the method comprising:
receiving, from a base station, a primary synchronization signal (PSS) and a secondary synchronization signal (SSS) over a frequency position for the PSS and the SSS; identifying the PSS including one PSS sequence that is associated with a first sequence of length 127, wherein a part of physical cell identification (ID) information is indicated by the one PSS sequence, wherein the one PSS sequence is mapped on to consecutive subcarriers in one OFDM symbol; and identifying the SSS including one SSS sequence that is defined by combination between a second sequence and a third sequence of length 127, wherein the physical cell ID information is indicated by the SSS sequence, wherein the PSS is place onto different OFDM symbol from the SSS and a physical broadcast channel (PBCH), wherein the PSS and the SSS are placed on only a part of resource elements available for the PBCH, and wherein a bandwidth for the PSS is same as a bandwidth for the SSS.

17 . The method of claim 16 , wherein the second sequence and the third sequence are M-sequences.

18 . The method of claim 16 , wherein the PSS is applicable for all frequency band associated with new radio (NR).

19 . The method of claim 16 , wherein a size of a frequency b

Assignees

• Samsung Electronics Co Ltd

Inventors

• Si Hongbo
• Nam Young-Han
• Onggosanusi Eko
• Gao Yuguang
• Liu Le

Classifications

• H04L27/2613 Primary

  Structure of the reference signals · CPC title

• H04J11/0073 Primary

  Acquisition of primary synchronisation channel, e.g. detection of cell-ID within cell-ID group · CPC title

• H04L27/26132

  using repetition · CPC title

• H04W48/10

  using broadcasted information · CPC title

• H04J11/0076

  Acquisition of secondary synchronisation channel, e.g. detection of cell-ID group · CPC title