Radio Base Station and Channel Allocation Information Transmission Method

A channel allocation information transmission method for transmitting channel allocation information indicating allocation of a radio communication channel, to a radio communication terminal by using a downlink frame including a broadcast control channel broadcasted by using an omnidirectional beam and a dedicated control channel transmitted in a predetermined direction by using a directional beam, the channel allocation information transmission method comprising the steps of:

• acquiring a propagation path characteristic between the radio communication terminal and a radio base station;
• notifying the radio communication terminal that the channel allocation information is to be transmitted by using the dedicated central channel, if the acquired propagation path characteristic satisfies a predetermined condition;
• and
• transmitting the channel allocation information by using the dedicated control channel in the downlink frame, after the radio communication terminal is notified that the channel allocation information is to be transmitted by using the dedicated control channel.

A radio base station that transmits channel allocation information indicating allocation of a radio communication channel, to a radio communication terminal by using a downlink frame including a broadcast control channel broadcasted by using an omnidirectional beam and a dedicated control channel transmitted in a predetermined diction by using a directional beam, the radio base station comprising:

• a propagation path characteristic acquisition unit configured to acquire a propagation path characteristic between the radio communication terminal and the radio base station;
• a notification unit configured to notify the radio communication terminal that the channel allocation information is to be transmitted by using the broadcast control channel, if the propagation path characteristic acquired by the propagation path characteristic acquisition unit satisfies a predetermined condition;
• and
• a channel allocation information transmitter, configured to transmit the channel allocation information by using the broadcast control channel in the downlink frame, after the notification unit notifies the radio communication terminal that the channel allocation information is to be transmitted by using the broadcast control channel.

A channel allocation information transmission method for transmitting channel allocation information indicating allocation of a radio communication channel, to a radio communication terminal by using a downlink frame including a broadcast control channel broadcasted by using an omnidirectional beam and a dedicated control channel transmitted in a predetermined direction by using a directional beam, the channel allocation information transmission method comprising the steps of:

• acquiring a propagation path characteristic between the radio communication terminal and a radio base station;
• notifying the radio communication terminal that the channel allocation information is to be transmitted by using the broadcast control channel, if the acquired propagation path characteristic satisfies a predetermined condition;
• and
• transmitting the channel allocation information by using the broadcast control channel in the downlink frame, after the radio communication terminal is notified that the channel allocation information is to be transmitted by using the broadcast control channel.