摘要:
Utilizing a frequency-bandwidth limited IMT frequency band of 3GHz, requirements of IMT-Advanced; that is, 100 Mbps for high speed movement and 1 Gbps for low speed movement in the downlink are satisfied. A communication system performs radio communication between a base station apparatus 40a and a mobile station apparatus 50 using a plurality of frequency layers having frequency bands different from each other, wherein the base station apparatus 40a assigns a downlink cell common control channel and a downlink cell common traffic channel to a low-frequency layer, and assigns a downlink cell dedicated control channel and a downlink cell dedicated traffic channel to a low-frequency layer and/or a high-frequency layer according to a downlink channel status and a communication requirement of the mobile station apparatus 50.
摘要:
A first radio system defines its communication-available period according to a control signal. A second radio communication system includes reception means for receiving the control signal issued from the first radio system and communication control means for calculating an empty time period of the communication-available period not used by the first radio communication system and assigning the empty time period as a local communication time region.