# US 11,310,089 B2 · Method and apparatus for synchronization signal design > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,310,089 B2 - Document ID: US11310089B2 - Status: Granted - Kind: B2 - Application number: 17/247,119 - Filed: 2020-11-30 - Published: 2021-03-18 - Granted: 2022-04-19 - Earliest claimed: 2016-11-03 - Assignees: Samsung Electronics Co., Ltd. - Applicants: Samsung Electronics Co., Ltd. - Inventors: Hongbo Si; Young-Han Nam; Eko Onggosanusi; Yuguang Gao; Le Liu - Web page: https://patentgrep.com/patent/US11310089B2 ## CPC - 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} - H04L 27/2613: {Structure of the reference signals} - H04L 27/2675: {Pilot or known symbols} - H04L 27/18: Phase-modulated carrier systems, i.e. using phase-shift keying (H04L27/32 takes precedence) - H04L 27/26132: {using repetition} - 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 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. ## Claims ### Claim 1 A base station for transmitting synchronization signals in a communication system, the base station comprising: at least one processor configured to control a transceiver: the transceiver configured to: transmit, to a user equipment (UE), a primary synchronization signal (PSS) including one PSS sequence that is associated with a first sequence of length 127 and only a part of physical cell identification (ID) information, wherein the one PSS sequence is mapped on to subcarriers in an orthogonal frequency division multiplexing (OFDM) symbol within one sync block; transmit, to the UE, a secondary synchronization signal (SSS) including one SSS sequence that is defined based on combination between a second sequence and a third sequence of length 127 and a whole of the physical cell ID information, wherein the one SSS sequence is mapped on to subcarriers in an OFDM symbol within one sync block; and transmit, to the UE, a physical broadcast channel (PBCH) including master information block (MIB), wherein the OFDM symbol for the PSS is a first located OFDM symbol in the one sync block, wherein the OFDM symbol for the PSS is different from the OFDM symbol for the SSS and an OFDM symbol for the PBCH within the sync block, and wherein a frequency position for the PSS and a frequency position for the SSS are identical. ### Claim 2 (depends on 1) The base station of claim 1, wherein a size of a bandwidth for the PSS and the SSS is proportional to a size of subcarrier spacing. ### Claim 3 (depends on 1) The base station of claim 1, wherein the whole of the physical cell ID information includes two parts of the physical cell ID information, wherein the one SSS sequence is defined based on cyclic shifts and the cyclic shifts correspond to at least one part of the physical cell ID information among two parts of the physical cell ID information, and wherein the second sequence and the third sequence are M-sequences. ### Claim 4 (depends on 1) The base station of claim 1, wherein the one PSS sequence is defined based on a cyclic shift corresponding to one part of the physical cell ID information among two parts of the physical cell ID information. ### Claim 5 (depends on 1) The base station of claim 1, wherein a bandwidth for the PSS is only a part of a bandwidth for the PBCH. ### Claim 6 A method for transmitting synchronization signals performed by a base station in a communication system, the method comprising: transmitting, to a user equipment (UE), a primary synchronization signal (PSS) including one PSS sequence that is associated with a first sequence of length 127 and only a part of physical cell identification (ID) information, wherein the one PSS sequence is mapped on to subcarriers in an orthogonal frequency division multiplexing (OFDM) symbol within one sync block; transmitting, to the UE, a secondary synchronization signal (SSS) including one SSS sequence that is defined based on combination between a second sequence and a third sequence of length 127 and a whole of the physical cell ID information, wherein the one SSS sequence is mapped on to subcarriers in an OFDM symbol within one sync block; and transmitting, to the UE, a physical broadcast channel (PBCH) including master information block (MIB), wherein the OFDM symbol for the PSS is a first located OFDM symbol in the one sync block, wherein the OFDM symbol for the PSS is different from the OFDM symbol for the SSS and an OFDM symbol for the PBCH within the sync block, and wherein a frequency position for the PSS and a frequency position for the SSS are identical. ### Claim 7 (depends on 6) The method of claim 6, wherein a size of a bandwidth for the PSS and the SSS is proportional to a size of subcarrier spacing. ### Claim 8 (depends on 6) The method of claim 6, wherein the whole of the physical cell ID information includes two parts of the physical cell ID information, wherein the one SSS sequence is defined based on cyclic shifts and the cyclic shifts correspond to at least one part of the physical cell ID information among two parts of the physical cell ID information, and wherein the second sequence and the third sequence are M-sequences. ### Claim 9 (depends on 6) The method of claim 6, wherein the one PSS sequence is defined based on a cyclic shift corresponding to one part of the physical cell ID information among two parts of the physical cell ID information. ### Claim 10 (depends on 6) The method of claim 6, wherein a bandwidth for the PSS is only a part of a bandwidth for the PBCH. ### Claim 11 A user equipment (UE) for receiving synchronization signals in a communication system, the UE comprising: at least one processor configured to control a transceiver: the transceiver configured to: receive, from a base station, a primary synchronization signal (PSS) including one PSS sequence that is associated with a first sequence of length 127 and only a part of physical cell identification (ID) information, wherein the one PSS sequence is mapped on to subcarriers in an orthogonal frequency division multiplexing (OFDM) symbol within one sync block; receive, from the base station, a secondary synchronization signal (SSS) including one SSS sequence that is defined based on combination between a second sequence and a third sequence of length 127 and a whole of the physical cell ID information, wherein the one SSS sequence is mapped on to subcarriers in an OFDM symbol within one sync block; and receive, from the base station, a physical broadcast channel (PBCH) including master information block (MIB), wherein the OFDM symbol for the PSS is a first located OFDM symbol in the one sync block, wherein the OFDM symbol for the PSS is different from the OFDM symbol for the SSS and an OFDM symbol for the PBCH within the sync block, and wherein a frequency position for the PSS and a frequency position for the SSS are identical. ### Claim 12 (depends on 11) The UE of claim 11, wherein a size of a bandwidth for the PSS and the SSS is proportional to a size of subcarrier spacing. ### Claim 13 (depends on 11) The UE of claim 11, wherein the whole of the physical cell ID information includes two parts of the physical cell ID information, wherein the one SSS sequence is defined based on cyclic shifts and the cyclic shifts correspond to at least one part of the physical cell ID information among two parts of the physical cell ID information, and wherein the second sequence and the third sequence are M-sequences. ### Claim 14 (depends on 11) The UE of claim 11, wherein the one PSS sequence is defined based on a cyclic shift corresponding to one part of the physical cell ID information among two parts of the physical cell ID information. ### Claim 15 (depends on 11) The UE of claim 11, wherein a bandwidth for the PSS is only a part of a bandwidth for the PBCH. ### Claim 16 A method for receiving synchronization signals performed by a user equipment (UE) in a communication system, the method comprising: receiving, from a base station, a primary synchronization signal (PSS) including one PSS sequence that is associated with a first sequence of length 127 and only a part of physical cell identification (ID) information, wherein the one PSS sequence is mapped on to subcarriers in an orthogonal frequency division multiplexing (OFDM) symbol within one sync block; receiving, from the base station, a secondary synchronization signal (SSS) including one SSS sequence that is defined based on combination between a second sequence and a third sequence of length 127 and a whole of the physical cell ID information, wherein the one SSS sequence is mapped on to subcarriers in an OFDM symbol within one sync block; and receiving, from the base station, a physical broadcast channel (PBCH) including master information block (MIB), wherein the OFDM symbol for the PSS is a first located OFDM symbol in the one sync block, wherein the OFDM symbol for the PSS is different from the OFDM symbol for the SSS and an OFDM symbol for the PBCH within the sync block, and wherein a frequency position for the PSS and a frequency position for the SSS are identical. ### Claim 17 (depends on 16) The method of claim 16, wherein a size of a bandwidth for the PSS and the SSS is proportional to a size of subcarrier spacing. ### Claim 18 (depends on 16) The method of claim 16, wherein the whole of the physical cell ID information includes two parts of the physical cell ID information, wherein the one SSS sequence is defined based on cyclic shifts and the cyclic shifts correspond to at least one part of the physical cell ID information among two parts of the physical cell ID information, and wherein the second sequence and the third sequence are M-sequences. ### Claim 19 (depends on 16) The method of claim 16, wherein the one PSS sequence is defined based on a cyclic shift corresponding to one part of the physical cell ID information among two parts of the physical cell ID information. ### Claim 20 (depends on 16) The method of claim 16, wherein a bandwidth for the PSS is only a part of a bandwidth for the PBCH.