In one aspect of the present invention, user equipment includes a reception unit configured to receive first system information in a frequency block where a synchronization signal is placed and third system information in another frequency block; and a control unit configured to stop detecting the synchronization signal, (1) when a control channel search space for receiving second system information does not exist based on a parameter value determined from the first system information and (2) when the control channel search space for receiving the second system information does not exist based on a parameter value determined from the third system information.

A method based on standalone secondary synchronization signals (SSSs) can include receiving a configuration of an SSS burst at a user equipment (UE) from a base station in a wireless communication network. The SSS burst can include standalone SSSs grouped into SSS sets. Each SSS set can be associated with a beam index. The configuration can indicate frequency and timing locations of the standalone SSSs. The method can further include performing pre-synchronization, radio resource management (RRM) measurement, or cell detection based on the standalone SSSs in the SSS burst.

The present disclosure relates to a pre-5.sup.th-Generation (5G) or 5G communication system that supports higher data rates beyond 4.sup.th-Generation (4G) communication systems. In particular, one or more embodiments relate to methods and systems for performing cell search in a millimeter wave (mmWave) based communication network. A method disclosed herein includes selecting a subset of receive (Rx) beams from a plurality of Rx beams and scheduling a scan order for the selected subset of Rx beams, upon receiving a plurality of signals from a Base Station. The method also includes performing a cell search using the selected subset of Rx beams individually in the determined scan order. The method further includes combining two or more of the selected Rx beams, upon failing the cell search using the selected subset of Rx beams individually. The method further includes performing the cell search using the combined Rx beams.

A method for performing wireless communication by a first device and a device for supporting same are provided. The method may include receiving information related to a time division duplex (TDD) slot configuration, transmitting, to a second device, a sidelink-synchronization signal block (S-SSB), wherein the S-SSB includes a sidelink primary synchronization signal (S-PSS), a sidelink secondary synchronization signal (S-SSS) and a physical sidelink broadcast channel (PSBCH), and transmitting, to the second device, a physical sidelink shared channel (PSSCH) based on the information related to the TDD slot configuration. For example, candidate resources to which a bitmap related to a sidelink resource pool is applied are configured based on the information related to the TDD slot configuration. For example, the candidate resources include one or more slots. For example, configuration information related to a sidelink symbol included in each of the one or more slots is received. For example, the configuration information related to the sidelink symbol includes information related to a position of the sidelink symbol. For example, the position of the sidelink symbol is configured to be the same for the candidate resources.

A method and apparatus for transmitting and receiving narrowband (NB) synchronization signals. A base station transmits an NB secondary synchronization signal (SSS) indicating N NB cell identities assigned for NB Internet of Things (IoT) operation, a specific sequence generated by multiplying a base sequence with a cover sequence in element units is used for the NB SSS, wherein the base sequence is generated through a second Zadoff-Chu sequence having a length corresponding to a largest prime number less than a length L in a frequency domain, and the specific sequence is divisionally mapped to and transmitted in a plurality of orthogonal frequency division multiplexing (OFDM) symbols in elements each having a length M.

The present disclosure relates to a communication method and system for converging a 5th-Generation (5G) communication system for supporting higher data rates beyond a 4th-Generation (4G) system with a technology for Internet of Things (IoT). The present disclosure may be applied to intelligent services based on the 5G communication technology and the IoT-related technology, such as smart home, smart building, smart city, smart car, connected car, health care, digital education, smart retail, security and safety services. The present invention presents a method for efficiently estimating a physical channel and, according to the present invention, a terminal of a communication system receives a synchronization signal from a base station, receives a broadcast channel from the base station, and can estimate the broadcast channel on the basis of the synchronization signal.

A method of operating a terminal in a wireless communication system is disclosed. The method of operating the terminal may comprise the terminal receiving one or more synchronization signal bocks (SSBs), selecting an SSB from among the one or more SSBs based on priority, generating at least one SSB group based on the selected SSB and a cyclic prefix (CP) boundary, and transmitting an indication message. The priority may be based on channel measurement and synchronization reference, the indication message may comprise slot configuration information based on the at least one SSB group.

A user equipment (UE) may monitor a downlink frequency position to detect a synchronization block (SSB) from a cellular base station. When monitoring the downlink frequency position, the UE may be configured to use at least one step size in calculating a SSB frequency position. The UE may determine a subcarrier spacing (SCS) used by the cellular base station in response to monitoring the downlink frequency position, and the subcarrier spacing for one or more SSB transmissions may be determined at least in part based on the step size used in calculating the SSB frequency position. The UE may then utilize the determined subcarrier spacing of the one or more SSB transmissions in communicating with the cellular base station.

A wireless device transmits, to a base station, at least one first measurement report of at least one synchronization signal of a cell. An indication, of one or more channel state information reference signals (CSI-RSs) of the cell, is received from the base station based on: the at least one first measurement report. and a first antenna port of the one or more CSI-RSs being quasi-collocated with a second port of the at least one synchronization signal. Based on the indication, at least one second measurement report of the one or more CSI-RSs is transmitted. Based on the at least one second measurement report, a downlink control information is received that initiates a random access procedure of the cell based on at least one first CSI-RS from the one or more CSI-RSs.

A communication method and apparatus, to help improve efficiency of identifying a fake base station. The method includes: A terminal device receives configuration information sent by a network device, and then simultaneously measures, based on the configuration information, a channel state information-reference signal CSI-RS and a synchronization signal block SSB that are sent by a cell. When determining that a measurement result of the CSI-RS and a measurement result of the SSB of the cell satisfy a preset condition, the terminal device reports a measurement report to the network device, where the measurement report includes identification information of the cell, so that the network device identifies a fake base station.