| 摘要 |
The present invention provides a communication system, a communication apparatus, a communication method, and a computer program thereof, which may improve communication performance, such as power consumption of communication process and communication speed. Communication apparatuses 101 and 102 are in compliance with USB OTG, and the communication apparatus 101 starts as a host device and the communication apparatus 102 starts as a peripheral device. In an enumeration process, the communication apparatus 101 acquires information, as a descriptor, on power consumption when the communication apparatus 102 operates as the host device and the peripheral device, from the communication apparatus 102 . Based on this acquired descriptor and a descriptor including similar information on its own power consumption, the communication apparatus 101 determines whether the power consumption decreases by switching the peripheral and the host. As a result of the determination, when it is determined that the power consumption decreases, the host and the peripheral are switched according to a communication protocol of OTG.
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