The apparatus may be a base station. The apparatus sets a first numerology for at least one synchronization signal of one or more synchronization signals to be different from a second numerology for at least one data signal of one or more data signals. The apparatus transmits the one or more synchronization signals to a user equipment (UE) based on the first numerology. The apparatus transmits the one or more data signals to the UE based on the second numerology.

Disclosed are a method for transmitting and receiving a synchronization signal in a wireless communication system supporting NarrowBand-Internet of Things (NB-IoT) and an apparatus therefor. Specifically, the method for transmitting and receiving a synchronization signal may include: receiving, from a base station, a narrowband synchronization signal; and performing a cell search procedure for the base station based on the narrowband synchronization signal, in which the narrowband synchronization signal may include a narrowband primary synchronization signal and a narrowband secondary synchronization signal, the narrowband primary synchronization signal and the narrowband secondary synchronization signal may be transmitted in different subframe, and the subframe in which the narrowband secondary synchronization signal is transmitted may be configured differently according to a type of a radio frame structure.

An auxiliary cell identity (ACI) is proposed besides the conventional physical cell identity carried on the synchronization channels. The ACI is designed and configured to be transmitted in one or more primary regions and one or more secondary regions and transmitted by a base station/cell to a plurality of user equipment (UEs) located within coverage of the cell in one or more transmissions. Each of the UEs is configured to detects the transmitted ACI and identifies the cell based on the detected ACI.

User Equipment and method for time and frequency synchronization, the method includes: a UE measuring a primary measurement reference signal transmitted on at least one basic sub-band, where the at least one basic sub-band has a preset carrier numerology and a preset waveform configuration; calculating a first time deviation and a first frequency deviation between the UE and a base station on the at least one basic sub-band, based on a measurement result obtained by measuring the primary measurement reference signal; and keeping the UE in time and frequency synchronization with the base station on the at least one basic sub-band, based on the first time deviation and the first frequency deviation. Accordingly, time and frequency synchronization between UE and base station in a 5G system can be achieved.

In some embodiments, a network node has an associated cell identifier (“cell ID”). The network node creates a primary synchronization signal (PSS), a first secondary synchronization signal, and one or more additional secondary synchronization signals. The combination of signals defines the cell ID. The cell ID is one of N possible cell IDs and N is determined by multiplying: a number of possible values for the PSS; a number of possible values for the first secondary synchronization signal; and for each additional secondary synchronization signal, a number of possible values for the additional secondary synchronization signal, such that N is greater than a legacy number of possible cell IDs determined by multiplying the number of possible values for the PSS and the number of possible values for the first secondary synchronization signal. The network node transmits the combination of the created signals.

A method for wireless communication, a terminal device and a network device are provided. The method for wireless communication includes: a terminal device receives a Synchronization Signal Block (SSB), here, the SSB comprises Primary Synchronization Signal (PSS), Secondary Synchronization Signal (SSS), and Physical Broadcasting Channel (PBCH); here, the SSB comprises four consecutive symbols in time domain, which are symbol S0, symbol S1, symbol S2 and symbol S3 in sequence; and the PSS is transmitted on the symbol S0, the SSS is transmitted on the symbol S2, and the PBCH is transmitted on the symbol S1, the symbol S2 and the symbol S3.

Aspects of the present disclosure describe discovering physical cell identifiers in wireless communications. It can be determined to discover a physical cell identifier of one or more cells in a zone based at least in part on detecting a condition. A cell-specific signal can be received from at least one cell of the one or more cells in the zone. The cell-specific signal can be associated with one of a plurality of cell-specific signal hypotheses. The physical cell identifier of the at least one cell can be determined as one of a plurality of physical cell identifiers that corresponds to the one of the plurality of cell-specific signal hypotheses.

A method performed by a serving cell of a base station (BS) is provided. The method receives a measurement report from a user equipment (UE). The measurement report includes measurements associated with another cell. The method then transmits, to the UE, beam information based on the received measurements via a two-stage indication. The beam information includes at least a synchronization signal (SS) block bitmap having one or more SS block bits corresponding to one or more SS block indices for the another cell.

Embodiments of the present disclosure provide a transmitter, a receiver and methods of operating a transmitter or a receiver. In one embodiment, the transmitter is for use with a base station and includes a primary module configured to provide a primary synchronization signal. The transmitter also includes a secondary mapping module configured to provide a secondary synchronization signal derived from two sequences taken from a same set of N sequences and indexed by an index pair (S.sub.1, S.sub.2) with S.sub.1 and S.sub.2 ranging from zero to N−1, wherein the index pair (S.sub.1, S.sub.2) is contained in a mapped set of index pairs corresponding to the same set of N sequences that defines a cell identity group. Additionally, the transmitter further includes a transmit module configured to transmit the primary and secondary synchronization signals.

Techniques providing opportunistic frequency switching for frame based equipment (FBE), such as may be configured to minimize opportunistic frequency switching delay in FBE new radio (NR) unlicensed (NR-U) networks and/or to provide frequency diversity FBE access based on offset sequences of medium sensing occasions for the carrier frequencies are disclosed. Within the FBE mode network, a base station may configure a pattern of sensing locations in each frame for each frequency transmission unit of the plurality of frequency transmission units, wherein an inter-unit delay of sensing locations between a first frequency transmission unit and a next adjacent frequency transmission unit and between a last frequency transmission unit and the first frequency transmission unit is a fixed duration. Opportunistic frequency switching of embodiments may utilize the medium sensing locations for opportunistically switching between a sequence of the frequency transmission units for implementing frequency diversity FBE access.