Radio base station and terminal
A channel access procedure is executed in a second frequency band different from the first frequency band. A radio base station executes a channel access procedure using a single directional reception beam, and transmits a single synchronization signal block in a channel occupancy time after the channel access procedure.
1 . A radio base station comprising:
a processor that executes a channel access procedure using a single sensing beam covering multiple transmission beams in a second frequency band different from a first frequency band; and
a transmitter that transmits a primary synchronization signal, a secondary synchronization signal or a downlink physical broadcast channel using the multiple transmission beams in a channel occupancy time after the channel access procedure,
wherein a sensing slot period of the channel access procedure in the second frequency band is shorter than a transmission gap after the channel access procedure, and wherein a radiation region of the single sensing beam is wider than a radiation region covered by the multiple transmission beams.
2 . A radio communication method of a radio base station, comprising:
executing a channel access procedure using a single sensing beam covering multiple transmission beams in a second frequency band different from a first frequency band; and
transmitting a primary synchronization signal, a secondary synchronization signal or a downlink physical broadcast channel using the multiple transmission beams in a channel occupancy time after the channel access procedure, and
wherein a sensing slot period of the channel access procedure in the second frequency band is shorter than a transmission gap after the channel access procedure, and wherein a radiation region of the single sensing beam is wider than a radiation region covered by the multiple transmission beams.
3 . A radio communication system including a radio base station and a terminal, wherein the radio base station comprises:
a processor that executes a channel access procedure using a single sensing beam covering multiple transmission beams in a second frequency band different from a first frequency band; and
a transmitter that transmits a primary synchronization signal, a secondary synchronization signal or a downlink physical broadcast channel using the multiple transmission beams in a channel occupancy time after the channel access procedure,
wherein a sensing slot period of the channel access procedure in the second frequency band is shorter than a transmission gap after the channel access procedure, and the terminal comprises a receiver that receives the primary synchronization signal, the secondary synchronization signal or the downlink physical broadcast channel, and wherein a radiation region of the single sensing beam is wider than a radiation region covered by the multiple transmission beams.