TRANSMISSION DEVICE, COMMUNICATION SYSTEM, TRANSMISSION METHOD, AND TRANSMISSION PROGRAM

摘要

PROBLEM TO BE SOLVED: To provide a transmission device, communication system, transmission method, and transmission program that improve transmission efficiency and communication quality in carrier aggregation (CA).SOLUTION: A transmission device is characterized in that it uses a first access mode for a signal in at least one first band among a plurality of bands, and uses a second access mode for a signal in at least one other second band among the plurality of bands, and transmits the signals in the respective bands. It is also characterized in that the first access mode is a frequency spread mode and the second access mode is a frequency division multiplexing mode.