Wireless communication system, wireless communication apparatus and wireless communication method

摘要

In a wireless communication system performing wireless communication via a wireless transmission path, a first wireless communication apparatus includes a receiver that receives a wireless signal via a wireless transmission path, a disconnection detector that detects disconnection of a wireless line connected to a second communication apparatus, a modulation controller that selects a modulation scheme, enabling communication under poor conditions in a transmission path, rather than a modulation scheme which has been used in wireless communication, and a transmitter that notifies the modulation scheme selected by the modulation scheme controller to the second wireless communication apparatus. The second wireless communication apparatus includes a receiver that receives the selected modulation scheme from the first wireless communication apparatus, and a transmitter that transmits signals to the first wireless communication apparatus based on the selected modulation scheme which is received by the receiver.

主权项

1. A wireless communication apparatus comprising:
a receiver configured to receive a wireless signal from a counterpart wireless communication apparatus via a wireless line; a disconnection detector configured to detect disconnection of the wireless line connected to said counterpart wireless communication apparatus due to degradation of a communicating condition; a modulation scheme controller configured to select a modulation scheme, enabling communication under poor conditions in the wireless line, rather than a previous modulation scheme which has been used in wireless communication when the disconnection of the wireless line is detected; and a transmitter configured to notify the modulation scheme selected by the modulation scheme controller to said counterpart wireless communication apparatus, thus applying the selected modulation scheme in generating its transmitting signal, wherein the disconnection detector is configured to determine that the wireless line is disconnected when at least one of the following occurs:
(i) a wireless frame is not synchronized with the wireless signal received by the receiver,(ii) a carrier is not synchronized with the wireless signal received by the receiver, or(iii) a decision as to whether or not a wireless frame is synchronized with the wireless signal received by the receiver and a decision as to whether or not a carrier is synchronized with the received wireless signal.