| 摘要 |
There are provided a directional communication apparatus whose low power consumption is realized, a communication system using this apparatus, a directional communication apparatus where time up to establishment of communication after restart of the communication is shortened, and a communication system using this apparatus. The directional communication apparatus has an antenna capable of controlling a directional characteristic, an information storage section which stores communication history for specifying communication conditions at the time of communication, and a control section which controls the antenna based on the communication history so that the antenna can communicate with a destination device recorded in the communication history. The directional communication apparatus calculates a movement vector based on the communication history, estimates a moved position of the destination device, and estimates communication conditions optimum for communication so as to restart the communication.
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