# US 2019/0174441 A1 · Synchronization signal options for 5g/new radio > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2019/0174441 A1 - Document ID: US20190174441A1 - Status: Published application - Kind: A1 - Application number: 16/268,916 - Filed: 2019-02-06 - Published: 2019-06-06 - Earliest claimed: 2016-11-30 - Assignees: QUALCOMM Incorporated - Applicants: Qualcomm Incorporated - Inventors: Sridhar RAMANUJAM; Xiaoxia ZHANG; Tao LUO; Juan MONTOJO - Web page: https://patentgrep.com/patent/US20190174441A1 ## CPC - H04W 56/0005: {synchronizing of arrival of multiple uplinks} - 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 27/26136: {Pilot sequence conveying additional information} - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) ## Abstract The present disclosure provides an example method and an apparatus for transmitting synchronization signals from an eNB with a different subcarrier spacing from rest of transmissions. That is, a primary synchronization signal (PSS), a secondary synchronization signal (SSS) may be transmitted using a first subcarrier spacing, a physical broadcast channel (PBCH), and/or a reference signal (RS) may be transmitted with a second subcarrier spacing, and other transmissions may be made using a third subcarrier spacing that is different from at least one of the first or second subcarrier spacing. Further, the order of symbols mapped to the synchronization signals may be reversed or otherwise modified within a transmission subframe. ## Claims ### Claim 1 A method of wireless communications, comprising: receiving, by a user equipment (UE), synchronization signals with a first subcarrier spacing, wherein the synchronization signals include a primary synchronization signal (PSS) and a secondary synchronization signal (SSS); receiving, by the UE, a broadcast signal and a reference signal (RS) with a second subcarrier spacing; and receiving, by the UE, other transmissions with a third subcarrier spacing, wherein the first subcarrier spacing, the second subcarrier spacing, and the third subcarrier spacing are defined at a base station, and wherein the first subcarrier spacing is less than the third subcarrier spacing, or the second subcarrier spacing is less than the third subcarrier spacing, or both the first subcarrier spacing and the second subcarrier spacing are less than the third subcarrier spacing. ### Claim 2 (depends on 1) The method of claim 1, wherein the first subcarrier spacing is different from the second carrier spacing, and both the first subcarrier spacing and the second carrier spacing are less than the third subcarrier spacing. ### Claim 3 (depends on 1) The method of claim 1, wherein the broadcast signal has at least two symbols having identical modulation symbols, RS sequences and RS tone mapping. ### Claim 4 (depends on 1) The method of claim 1, wherein the broadcast signal and the RS are frequency division multiplexed (FDM). ### Claim 5 (depends on 1) The method of claim 1, wherein the PSS and SSS have a first transmission time interval (TTI) and the broadcast signal and RS have a second TTI, with the first TTI and the second TTI being different. ### Claim 6 (depends on 1) The method of claim 1, wherein multiple PSS sequences are mapped to multiple PSS symbols and multiple SSS sequences are mapped to multiple SSS symbols. ### Claim 7 (depends on 1) The method of claim 1, wherein the first subcarrier spacing is 15 KHz and the second subcarrier spacing is 30 KHz. ### Claim 8 (depends on 1) The method of claim 1, wherein the SSS is received in a symbol that is located before a symbol of the PSS. ### Claim 9 (depends on 1) The method of claim 1, wherein receiving the PSS and the SSS with a first subcarrier spacing comprises receiving multiple identical PSS symbols. ### Claim 10 (depends on 1) The method of claim 1, wherein receiving the PSS and the SSS with a first subcarrier spacing comprises receiving multiple identical SSS symbols. ### Claim 11 (depends on 1) The method of claim 1, wherein receiving the PSS and the SSS comprises receiving multiple symbols of at least one of PSS symbols or SSS symbol. ### Claim 12 (depends on 1) The method of claim 1, wherein the broadcast signal comprises a physical broadcast channel (PBCH). ### Claim 13 A user equipment (UE) for wireless communications, comprising: a transceiver; a memory; and a processor communicatively coupled with the transceiver and the memory, the processor and the memory configured to: receive synchronization signals with a first subcarrier spacing, wherein the synchronization signals include a primary synchronization signal (PSS) and a secondary synchronization signal (SSS); receive a broadcast signal and a reference signal (RS) with a second subcarrier spacing; and receive other transmissions with a third subcarrier spacing, wherein the first subcarrier spacing, the second subcarrier spacing, and the third subcarrier spacing are defined at a base station, and wherein the first subcarrier spacing is less than the third subcarrier spacing, or the second subcarrier spacing is less than the third subcarrier spacing, or both the first subcarrier spacing and the second subcarrier spacing are less than the third subcarrier spacing. ### Claim 14 (depends on 13) The UE of claim 13, wherein the first subcarrier spacing is different from the second carrier spacing, and both the first subcarrier spacing and the second carrier spacing are less than the third subcarrier spacing. ### Claim 15 (depends on 13) The UE of claim 13, wherein the broadcast signal has at least two symbols having identical modulation symbols, RS sequences and RS tone mapping. ### Claim 16 (depends on 13) The UE of claim 13, wherein the broadcast signal and the RS are frequency division multiplexed (FDM). ### Claim 17 (depends on 13) The UE of claim 13, wherein the PSS and SSS have a first transmission time interval (TTI) and the broadcast signal and RS have a second TTI, with the first TTI and the second TTI being different. ### Claim 18 (depends on 13) The UE of claim 13, wherein multiple PSS sequences are mapped to multiple PSS symbols and multiple SSS sequences are mapped to multiple SSS symbols. ### Claim 19 (depends on 13) The UE of claim 13, wherein the first subcarrier spacing is 15 KHz and the second subcarrier spacing is 30 KHz. ### Claim 20 (depends on 13) The UE of claim 13, wherein the SSS is received in a symbol that is located before a symbol of the PSS. ### Claim 21 (depends on 13) The UE of claim 13, wherein receiving the PSS and the SSS with a first subcarrier spacing comprises receiving multiple identical PSS symbols. ### Claim 22 (depends on 13) The UE of claim 13, wherein receiving the PSS and the SSS with a first subcarrier spacing comprises receiving multiple identical SSS symbols. ### Claim 23 (depends on 13) The UE of claim 13, wherein receiving the PSS and the SSS comprises receiving multiple symbols of at least one of PSS symbols or SSS symbol. ### Claim 24 (depends on 13) The UE of claim 13, wherein the broadcast signal comprises a physical broadcast channel (PBCH). ### Claim 25 A user equipment (UE) comprising means for receiving synchronization signals with a first subcarrier spacing, wherein the synchronization signals include a primary synchronization signal (PSS) and a secondary synchronization signal (SSS); means for receiving a broadcast signal and a reference signal (RS) with a second subcarrier spacing; and means for receiving other transmissions with a third subcarrier spacing, wherein the first subcarrier spacing, the second subcarrier spacing, and the third subcarrier spacing are defined at a base station, and wherein the first subcarrier spacing is less than the third subcarrier spacing, or the second subcarrier spacing is less than the third subcarrier spacing, or both the first subcarrier spacing and the second subcarrier spacing are less than the third subcarrier spacing. ### Claim 26 (depends on 25) The UE of claim 25, wherein the first subcarrier spacing is different from the second carrier spacing, and both the first subcarrier spacing and the second carrier spacing are less than the third subcarrier spacing. ### Claim 27 (depends on 25) The UE of claim 25, wherein the broadcast signal comprises a physical broadcast channel (PBCH). ### Claim 28 A non-transitory computer-readable medium having processor-executable instructions stored thereon to cause a processor to operations, comprising: receiving, by a user equipment (UE), synchronization signals with a first subcarrier spacing, wherein the synchronization signals include a primary synchronization signal (PSS) and a secondary synchronization signal (SSS); receiving, by the UE, a broadcast signal and a reference signal (RS) with a second subcarrier spacing; and receiving, by the UE, other transmissions with a third subcarrier spacing, wherein the first subcarrier spacing, the second subcarrier spacing, and the third subcarrier spacing are defined at a base station, and wherein the first subcarrier spacing is less than the third subcarrier spacing, or the second subcarrier spacing is less than the third subcarrier spacing, or both the first subcarrier spacing and the second subcarrier spacing are less than the third subcarrier spacing. ### Claim 29 (depends on 28) The non-transitory computer-readable medium of claim 28, wherein the first subcarrier spacing is different from the second carrier spacing, and both the first subcarrier spacing and the second carrier spacing are less than the third subcarrier spacing. ### Claim 30 (depends on 28) The non-transitory computer-readable medium of claim 28, wherein the broadcast signal comprises a physical broadcast channel (PBCH).