Radio base station and terminal
A BS ( 100 ) receives, from UE ( 200 B), terminal location information indicating a location of the UE ( 200 B). The BS ( 100 ) selects an antenna beam for the UE ( 200 A) to be transmitted from the BS ( 100 ) based on the terminal location information.
1 . A radio base station comprising:
a receiver that receives, from a terminal, terminal location information indicating a location of the terminal;
a processor that selects, among a plurality of candidate antenna beams, an antenna beam for the terminal to be transmitted from the radio base station in a direction closest to a direction in which the terminal is located, based on the terminal location; and
a transmitter that transmits, to the terminal, base station location information indicating a location of the radio base station using the selected antenna beam,
wherein the processor is further configured to:
detect a path change of signal received from the terminal; and
change a direction of the selected antenna beam based on the path change.
2 . The radio base station according to claim 1 , wherein the transmitter transmits, to the terminal, change information indicating a change in direction of the antenna beam.
3 . A terminal comprising:
a receiver that receives, from a radio base station, base station location information indicating a location of the radio base station;
a processor that selects, among a plurality of candidate antenna beams, an antenna beam for the radio base station to be transmitted from the terminal in a direction closest to a direction in which the radio base station is located, based on the radio base station location; and
a transmitter that transmits a physical random access channel (PRACH) to the radio base station using the selected antenna beam,
wherein:
the receiver is further configured to receive change amounts of a radio base station antenna beam direction; and
the processor is further configured to change a direction of the selected antenna beam based on the change amounts.
4 . The terminal according to claim 3 , wherein the transmitter transmits, to the radio base station, terminal location information indicating a location of the terminal.