FIELD

The subject matter disclosed herein relates generally to wireless communications and more particularly relates to synchronization signal block selection.

BACKGROUND

The following abbreviations are herewith defined, at least some of which are referred to within the following description: Third Generation Partnership Project (“3GPP”), Positive-Acknowledgment (“ACK”), Binary Phase Shift Keying (“BPSK”), Base Station (“BS”), Bandwidth (“BW”), Bandwidth Part (“BWP”), Component Carrier (“CC”), Clear Channel Assessment (“CCA”), Common Control Resource Set (“CORESET”), Cyclic Prefix (“CP”), Cyclical Redundancy Check (“CRC”), Channel State Information (“CSI”), Common Search Space (“CSS”), Discrete Fourier Transform Spread (“DFTS”), Downlink Control Information (“DCI”), Downlink (“DL”), Downlink Pilot Time Slot (“DwPTS”), Enhanced Clear Channel Assessment (“eCCA”), Enhanced Mobile Broadband (“eMBB”), Evolved Node B (“eNB”), European Telecommunications Standards Institute (“ETSI”), Frame Based Equipment (“FBE”), Frequency Division Duplex (“FDD”), Frequency Division Multiplexing (“FDM”), Frequency Division Multiple Access (“FDMA”), Frequency Division Orthogonal Cover Code (“FD-OCC”), g Node B (“gNB”), Guard Period (“GP”), Hybrid Automatic Repeat Request (“HARQ”), Internet-of-Things (“IoT”), Licensed Assisted Access (“LAA”), Load Based Equipment (“LBE”), Listen-Before-Talk (“LBT”), Local Oscillator (“LO”), Long Term Evolution (“LTE”), Least Significant Bit (“LSB”), Multiple Access (“MA”), Modulation Coding Scheme (“MCS”), Machine Type Communication (“MTC”), Multiple Input Multiple Output (“MIMO”), Multi User Shared Access (“MUSA”), Narrowband (“NB”), Negative-Acknowledgment (“NACK”) or (“NAK”), Next Generation Node B (“gNB”), Network Entity (“NE”), Non-Orthogonal Multiple Access (“NOMA”), Orthogonal Frequency Division Multiplexing (“OFDM”), Primary Cell (“PCell”), Physical Broadcast Channel (“PBCH”), Physical Downlink Control Channel (“PDCCH”), Physical Downlink Shared Channel (“PDSCH”), Pattern Division Multiple Access (“PDMA”), Physical Hybrid ARQ Indicator Channel (“PHICH”), Physical Random Access Channel (“PRACH”), Physical Resource Block (“PRB”), Primary Synchronization Signal (“PSS”), Physical Uplink Control Channel (“PUCCH”), Physical Uplink Shared Channel (“PUSCH”), Quality of Service (“QoS”), Quadrature Phase Shift Keying (“QPSK”), Radio Resource Control (“RRC”), Random Access Channel (“RACH”), Random Access Response (“RAR”), Radio Network Temporary Identifier (“RNTI”), Reference Signal (“RS”), Remaining Minimum System Information (“RMSI”), Radio Resource Management (“RRM”), Reference Signal Received Power (“RSRP”), Reference Signal Received Quality (“RSRQ”), Resource Spread Multiple Access (“RSMA”), Reference Signal Signal to Interference and Noise Ratio (“RS-SINR”), Round Trip Time (“RTT”), Receive (“RX”), Sparse Code Multiple Access (“SCMA”), Subcarrier Spacing (“SCS”), Scheduling Request (“SR”), Single Carrier Frequency Division Multiple Access (“SC-FDMA”), Secondary Cell (“SCell”), Shared Channel (“SCH”), System Frame Number (“SFN”), Signal-to-Interference-Plus-Noise Ratio (“SINR”), System Information Block (“SIB”), SS/PBCH Block Measurement Time Configuration (“SMTC”), Synchronization Signal (“SS”), Secondary Synchronization Signal (“SSS”), Transport Block (“TB”), Transport Block Size (“TBS”), Time-Division Duplex (“TDD”), Time Division Multiplex (“TDM”), Time Division Orthogonal Cover Code (“TD-OCC”), Transmit/Receive Point (“TRP”), Transmission Time Interval (“TTI”), Transmit (“TX”), Uplink Control Information (“UCI”), User Entity/Equipment (Mobile Terminal) (“UE”), Uplink (“UL”), Universal Mobile Telecommunications System (“UMTS”), Uplink Pilot Time Slot (“UpPTS”), Ultra-reliability and Low-latency Communications (“URLLC”), and Worldwide Interoperability for Microwave Access (“WiMAX”). As used herein, “HARQ-ACK” may represent collectively the Positive Acknowledge (“ACK”) and the Negative Acknowledge (“NACK”). ACK means that a TB is correctly received while NACK (or NAK) means a TB is erroneously received.

In certain wireless communications networks, synchronization signal blocks may be used. In such networks, a frequency corresponding to a synchronization signal block may be unknown.

BRIEF SUMMARY

Methods for synchronization signal block selection are disclosed. Apparatuses and systems also perform the functions of the method. In one embodiment, the method includes receiving multiple synchronization signal blocks on a first wideband carrier. In such an embodiment, each synchronization signal block of the multiple synchronization signal blocks includes at least one synchronization signal and a physical broadcast channel. In certain embodiments, the method includes detecting at least one synchronization signal block of the multiple synchronization signal blocks. In some embodiments, the method includes determining at least one synchronization signal frequency associated with the at least one detected synchronization signal block. In various embodiments, the method includes selecting a first synchronization signal block of the at least one detected synchronization signal block and a first synchronization signal frequency of the at least one synchronization signal frequency. In such embodiments, the first synchronization signal block is associated with the first synchronization signal frequency. In certain embodiments, the method includes decoding a first physical broadcast channel of the first synchronization signal block. In some embodiments, the method includes determining whether to reselect the first synchronization signal block based on a result of decoding the first physical broadcast channel.

One apparatus for synchronization signal block selection includes a receiver that receives multiple synchronization signal blocks on a first wideband carrier. In such an embodiment, each synchronization signal block of the multiple synchronization signal blocks includes at least one synchronization signal and a physical broadcast channel. In certain embodiments, the apparatus includes a processor that: detects at least one synchronization signal block of the multiple synchronization signal blocks; determines at least one synchronization signal frequency associated with the at least one detected synchronization signal block; selects a first synchronization signal block of the at least one detected synchronization signal block and a first synchronization signal frequency of the at least one synchronization signal frequency, wherein the first synchronization signal block is associated with the first synchronization signal frequency; decodes a first physical broadcast channel of the first synchronization signal block; and determines whether to reselect the first synchronization signal block based on a result of decoding the first physical broadcast channel.

