Radio communication apparatus, radio communication system, and radio communication method
A radio communication apparatus to perform communication with another radio communication apparatus by using a plurality of pairs of a downlink frequency band and an uplink frequency band, the apparatus includes: a receiving unit configured to receive a control message by using a downlink frequency band of a first pair among downlink frequency bands of the pairs during a random access procedure to said another radio communication apparatus, the control message including identification information indicating use of an uplink frequency band of a second pair different from the first pair, the downlink frequency band of the first pair being monitored for control messages by the radio communication apparatus; and a control unit configured to control the radio communication apparatus to perform data communication with said another radio communication apparatus by using the uplink frequency band of the second pair indicated by the identification information included in the control message.
1. A radio communication apparatus to perform communication with another radio communication apparatus by using a plurality of pairs of a downlink frequency band and an uplink frequency band, the apparatus comprising:
a receiving unit configured to receive a control message by using a downlink frequency band of a first pair among downlink frequency bands of the pairs during a random access procedure to said another radio communication apparatus, the control message including identification information indicating use of an uplink frequency band of a second pair different from the first pair, the downlink frequency band of the first pair being monitored for control messages by the radio communication apparatus; and
a control unit configured to control the radio communication apparatus to perform data communication with said another radio communication apparatus by using the uplink frequency band of the second pair indicated by the identification information included in the control message.
2. A radio communication apparatus to perform communication with another radio communication apparatus by using a plurality of pairs of a downlink frequency band and an uplink frequency band, the apparatus comprising:
a control unit configured to, when said another radio communication apparatus monitors control messages by using a downlink frequency band of a first pair among downlink frequency bands of the pairs, select an uplink frequency band of a second pair different from the first pair as an uplink frequency band to be used in data communication with said another radio communication apparatus; and
a transmitting unit configured to transmit a control message to said another radio communication apparatus by using the downlink frequency band of the first pair during a random access procedure, the control message including identification information indicating use of the uplink frequency band of the second pair.
3. A radio communication system to perform communication by using a plurality of pairs of a downlink frequency band and an uplink frequency band, the system comprising:
a first radio communication apparatus configured to transmit a control message by using a downlink frequency band of a first pair among downlink frequency bands of the pairs during a random access procedure, the control message including identification information indicating use of an uplink frequency band of a second pair different from the first pair, the downlink frequency band of the first pair being monitored for control messages by a communicating peer; and
a second radio communication apparatus configured to receive the control message from the first radio communication apparatus by using the downlink frequency band of the first pair, and perform data communication by using the uplink frequency band of the second pair indicated by the identification information included in the control message.
4. A radio communication method for use in a radio communication system including first and second radio communication apparatuses to perform communication by using a plurality of pairs of a downlink frequency band and an uplink frequency band, the method comprising:
transmitting, by the first radio communication apparatus, a control message to the second radio communication apparatus by using a downlink frequency band of a first pair among downlink frequency bands of the pairs when performing a random access procedure by the second radio communication apparatus, the control message including identification information indicating use of an uplink frequency band of a second pair different from the first pair, the downlink frequency band of the first pair being monitored for control messages by the second radio communication apparatus;
receiving, by the second radio communication apparatus, the control message from the first radio communication apparatus by using the downlink frequency band of the first pair; and
performing, by the second radio communication apparatus, data communication by using the uplink frequency band of the second pair indicated by the identification information included in the control message.