The present disclosure discloses a method for receiving a downlink signal by a UE in a wireless communication system. Particularly, the method may include receiving a synchronization signal block (SSB) including a primary synchronization signal (PSS), a secondary synchronization signal (SSS), and a physical broadcasting channel (PBCH), and obtaining an indicator indicating a subcarrier spacing for the downlink channel from the PBCH, and receiving the downlink signal on the basis of the subcarrier spacing. The indicator may indicate a different subcarrier spacing according to a frequency band in which the UE operates.

A base station for transmitting system related information in a mobile telecommunications network. The base station is configured to transmit system information for the cell provided by the base station and to broadcast a version synchronisation signal, wherein the version synchronisation signal provides version information regarding the current version of the system information for the cell.

A base station may determine a root for a sequence to be included in a signal to a UE. The base station may generate a generalized Chu sequence based on the root and scramble the generalized Chu sequence using a pseudorandom sequence that is common to a plurality of base stations. The base station may transmit the scrambled generalized Chu sequence to indicate the beginning of a downlink transmission. The UE may receive this scrambled generalized Chu sequence and determine if a beginning of a downlink transmission from a serving base station based on the received generalized Chu sequence and an expected generalized Chu sequence.

A method and a device for wireless communication are disclosed. The base station transmits a first radio signal on first frequency-domain resources in a first time window, and then transmits a first signaling. The center frequency of the first frequency-domain resources is a first frequency; the first frequency-domain resources comprise X subcarrier(s); a center frequency of a first carrier to which the first frequency-domain resources belong is a second frequency; an interval between the first frequency and the second frequency in frequency domain is related to a subcarrier spacing of the X subcarrier(s); the first signaling is used to determine a feature ID of a transmitter of the first radio signal in the first carrier. The present disclosure can independently configure the center frequency of a carrier and the center frequency of a user equipment to avoid resource waste and reduce synchronization complexity.

A User Equipment (UE) and a method performed by the UE for multi-connectivity are provided. The method includes receiving, from a master node, a Radio Resource Control (RRC) connection reconfiguration message when a Signaling Radio Bearer 3 (SRB3) connection with a secondary node has not been established, the RRC connection reconfiguration message comprising Secondary Cell Group (SCG) information; and establishing the SRB3 connection with the secondary node according to the RRC connection reconfiguration message.

The present disclosure provides a method of transmitting a Physical Broadcasting Channel (PBCH) by a base station in a wireless communication system. Particularly, the method may include generating a PBCH payload including bits indicating a frame in which the PBCH is transmitted; scrambling at least some of the bits included in the PBCH payload using second and third least significant bits among the bits; and transmitting the bits of the PBCH payload including the at least some scrambled bits to a user equipment.

A terminal is disclosed including a receiver that receives a synchronization signal/physical broadcast channel (SS/PBCH) block including a synchronization signal (SS) and a physical broadcast channel (PBCH); and a processor that determines a control resource set based on configuration information in a configuration information set of a plurality of configuration information sets, the configuration information set being associated with information based on the SS/PBCH block, the configuration information being associated with a value of a field in the PBCH, and the configuration information including a plurality of parameters regarding the control resource set. In other aspects, a radio communication method and a base station are also disclosed.

Disclosed are a method for improving measurement performance of a terminal in a wireless communication system, and an apparatus therefor. Specifically, in a method wherein a terminal performs measurement in a wireless communication system, a method performed by the terminal comprises the steps of: receiving, from a serving base station, configuration information for measurement of a reference signal receive power (RSRP) and/or a reference signal received quality (RSRQ), wherein the configuration information includes port configuration information related to an antenna port to which a reference signal is transmitted and measurement configuration information related to a correlation between a cell-specific reference signal (CRS) and a re-synchronization signal (RSS) for the measurement; receiving the CRS and/or the RSS from a neighbor base station; calculating the RSRP and/or the RSRQ according to the configuration information by using the CRS and the RSS; and reporting the RSRP and/or the RSRQ to the serving base station.

Provided are a base station device and a mobile station device, which can lighten a cell-search processing. The base station device includes a frame constitution unit for forming a frame, in which a pilot symbol multiplied by a base station scrambling code and a plurality of sequences contained in the corresponding sequence set is arranged in at least the head or tail, and a radio transmission unit for sending the formed frame. On the receiving side, the frame timing can be detected from the position of a pilot symbol contained in that frame. Since the base station scrambling code and the sequence set containing the sequences are made to correspond to each other, candidates can be narrowed to at most the base station scrambling codes of the number of the combinations of the sequences contained in the sequence set, by detecting the sequences multiplied by the pilot symbol.

The present invention is designed to improve spectral efficiency in a system that runs LTE/LTE-A by using a carrier in which LBT (Listen Before Talk) is configured. One aspect of the present invention provides a radio base station in a radio communication system where the radio base station and a user terminal communicate by using a carrier in which LBT is configured, and this radio base station has a measurement section that executes LBT in a predetermined carrier sensing duration and acquires an LBT result, and a transmission section that transmits a downlink signal based on the LBT result, and the predetermined carrier sensing duration includes a first carrier sensing duration and a second carrier sensing duration, which is shorter than the first carrier sensing duration.