User equipments, base stations and methods

A base station apparatus that communicates with a user equipment (UE), comprising:

• transmitting circuitry configured to transmit a radio resource control (RRC) message including information indicating a subcarrier spacing of a block comprising, at least, a primary synchronization signal (PSS) and a secondary synchronization signal (SSS) and a physical broadcast channel (PBCH),
• the transmitting circuitry configured to transmit, based on the information, the block comprising, at least, the PSS and the SSS and the PBCH, wherein
• the information is used only for a case where the UE is in a RRC connected,
• in a case that the information is not configured, the transmitting circuitry is configured to transmit, based on a default value of the subcarrier spacing, the block comprising, at least, the PSS and the SSS and the PBCH, and
• the default value of the subcarrier spacing is given based on a frequency band.

A communication method of a user equipment (UE) that communicates with a base station apparatus comprising:

• receiving a radio resource control (RRC) message including information indicating a subcarrier spacing of a block comprising, at least, a primary synchronization signal (PSS) and a secondary synchronization signal (SSS) and a physical broadcast channel (PBCH), and
• receiving, based on the information, the block comprising, at least, the PSS and the SSS and the PBCH, wherein
• the information is used only for a case where the UE is in a RRC connected,
• in a case that the information is not configured, receiving, based on a default value of the subcarrier spacing, the block comprising, at least, the PSS and the SSS and the PBCH, and
• the default value of the subcarrier spacing is given based on a frequency band.

A communication method of a base station apparatus that communicates with a user equipment (UE) comprising:

• transmitting a radio resource control (RRC) message including information indicating a subcarrier spacing of a block comprising, at least, a primary synchronization signal (PSS) and a secondary synchronization signal (SSS) and a physical broadcast channel (PBCH), and
• transmitting, based on the information, the block comprising, at least, the PSS and the SSS and the PBCH, wherein
• the information is used only for a case where the UE is in a RRC connected,
• in a case that the information is not configured, transmitting, based on a default value of the subcarrier spacing, the block comprising, at least, the PSS and the SSS and the PBCH, and
• the default value of the subcarrier spacing is given based on a frequency band.