# US 11,121,768 B2 · Synchronization signal transmission techniques > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,121,768 B2 - Document ID: US11121768B2 - Status: Granted - Kind: B2 - Application number: 16/349,960 - Filed: 2018-01-04 - Published: 2019-10-17 - Granted: 2021-09-14 - Earliest claimed: 2017-01-09 - Assignees: Apple Inc. - Applicants: Apple Inc. - Inventors: Dae Won Lee; Seunghee Han; Gregory V. Morozov; Alexei Davydov; Hong He - Web page: https://patentgrep.com/patent/US11121768B2 ## CPC - H04B 7/2656: {for structure of frame, burst} - H04B 7/2681: {Synchronisation of a mobile station with one base station} - H04L 27/2666: {Acquisition of further OFDM parameters, e.g. bandwidth, subcarrier spacing, or guard interval length} - H04W 56/0015: {one node acting as a reference for the others} - H04B: TRANSMISSION - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) ## Abstract Systems and methods for synchronizing communications between a User Equipment (UE) and Base Station (BS) using a synchronization signal structure. The synchronization signal structure can include a sequence of Synchronization Signals (SS) 5 including repetitions of a synchronization signal burst set. The synchronization signal burst set can include a plurality of synchronization signal bursts. The synchronization signal bursts can include a plurality of synchronization signal blocks, wherein the synchronization signal blocks can include a plurality of Synchronization Signals (SS). ## Claims ### Claim 1 An apparatus of a user equipment (UE) operable to synchronize with a New Radio (NR) cell, the apparatus comprising: one or more processors configured to: search a plurality of frequency ranges to detect a synchronization signal/physical broadcast channel (SS/PBCH) block, wherein to detect the SS comprises to cross-correlate synchronization signal blocks within a synchronization signal burst set; decode, at the UE, the SS/PBCH block that includes a PBCH, a primary synchronization signal (PSS) and a secondary synchronization signal (SSS) in consecutive symbols; and perform, at the UE, a synchronization with the NR cell based in part on the SS/PBCH block, wherein the synchronization includes a time and frequency synchronization between the UE and the NR cell; and a memory interface configured to send to a memory the SS/PBCH block. ### Claim 2 (depends on 1) The apparatus of claim 1, further comprising a transceiver configured to receive the SS/PBCH block at the UE. ### Claim 3 (depends on 1) The apparatus of claim 1, wherein the SS/PBCH block is in accordance with a 15 kilohertz (kHz) subcarrier spacing. ### Claim 4 (depends on 1) The apparatus of claim 1, wherein the one or more processors are configured to decode the SS/PBCH block received at the UE in accordance with a defined periodicity. ### Claim 5 (depends on 4) The apparatus of claim 4, wherein the defined periodicity is a half frame. ### Claim 6 An apparatus of a user equipment (UE) of a millimeter wave new radio system operable to synchronize communication with a base station (BS), the apparatus comprising: a memory interface configured to access synchronization parameters in a memory; and one or more processors configured to: search a plurality of frequency ranges to detect synchronization signals (SS), wherein to detect the SS comprises to cross-correlate synchronization signal blocks within a synchronization signal burst set; decode, for a plurality of beams, a sequence of SS according to one or more accessed synchronization parameters, the sequence of SS including: repetitions of the synchronization signal burst set, the synchronization signal burst set including: a plurality of synchronization signal bursts, the synchronization signal bursts including: a plurality of synchronization signal blocks, the synchronization signal blocks including: a plurality of SS; and synchronize with a given BS based on the decoded SS. ### Claim 7 (depends on 6) The apparatus of claim 6, further comprising a transceiver configured to receive the sequence of SS. ### Claim 8 (depends on 6) The apparatus of claim 6, wherein the synchronization parameters include the periodicity of the synchronization signal burst set. ### Claim 9 (depends on 6) The apparatus of claim 6, wherein the synchronization parameters include the duration of the synchronization signal burst set. ### Claim 10 (depends on 6) The apparatus of claim 6, wherein a synchronization signal block with a particular synchronization signal block index has a particular periodicity. ### Claim 11 (depends on 6) The apparatus of claim 6, wherein synchronization signal blocks with different synchronization signal block index numbers represent SS transmitted in different time instances over a half radio frame period. ### Claim 12 (depends on 6) The apparatus of claim 6, wherein synchronization signal blocks are consecutive within a synchronization signal burst. ### Claim 13 At least one non-transitory machine readable storage medium having instructions embodied thereon for synchronizing communication between a user equipment (UE) and a base station (BS), the instructions when executed by one or more processors at the UE perform the following: searching a plurality of frequency ranges to detect synchronization signals (SS) wherein detection of the SS includes cross-correlating synchronization signal blocks within a synchronization signal burst set; decoding, for a plurality of beams, a sequence of SS according to one or more accessed synchronization parameters, the sequence of SS including: repetitions of the synchronization signal burst set, the synchronization signal burst set including: a plurality of synchronization signal bursts, the synchronization signal bursts including: a plurality of synchronization signal blocks, the synchronization signal blocks including: a plurality of SS; and synchronizing with a given BS based on the decoded SS. ### Claim 14 (depends on 13) The at least one non-transitory machine readable storage medium of claim 13, wherein the synchronization parameters include the periodicity of the synchronization signal burst set. ### Claim 15 (depends on 13) The at least one non-transitory machine readable storage medium of claim 13, wherein the synchronization parameters include the duration of the synchronization signal burst set. ### Claim 16 (depends on 13) The at least one non-transitory machine readable storage medium of claim 13, wherein a synchronization signal block with a particular synchronization signal block index has a particular periodicity. ### Claim 17 (depends on 13) The at least one non-transitory machine readable storage medium of claim 13, wherein synchronization signal blocks with different synchronization signal block index numbers represent SS transmitted in different time instances over a half radio frame period. ### Claim 18 (depends on 13) The at least one non-transitory machine readable storage medium of claim 13, wherein synchronization signal blocks are consecutive within a synchronization signal burst.