Cooperative spectrum sensing method and in-vehicle wireless communication device

摘要

Efficient spectrum sensing is implemented taking into account the fading caused by multipath fading and shadow fading in a mobile environment. A cooperative spectrum sensing method performed by a plurality of in-vehicle wireless communication devices, includes: a decorrelation time acquisition step for acquiring a first decorrelation time, which is a time interval in which channel fluctuations resulting from multipath fading are decorrelated, and a second decorrelation time, which is a time interval in which channel fluctuations resulting from shadow fading are decorrelated; a sensing step for repeatedly performing sensing at a time interval equal to or longer than the first decorrelation time; a notification step for wireless transmitting a plurality of most recent sensing results at a time interval equal to or longer than the second decorrelation time; and a determination step for determining a state of a channel on the basis of the plurality of sensing results transmitted from the plurality of in-vehicle wireless communication devices.

主权项

1. A cooperative spectrum sensing method performed by a plurality of in-vehicle wireless communication devices,
the method comprising: a decorrelation time acquisition step in which each in-vehicle wireless communication device acquires a first decorrelation time, which is a time interval in which channel fluctuations resulting from multipath fading are decorrelated, and a second decorrelation time, which is a time interval in which channel fluctuations resulting from shadow fading are decorrelated; a sensing step in which each in-vehicle wireless communication device repeatedly performs sensing at a time interval equal to or longer than the first decorrelation time; a notification step in which each in-vehicle wireless communication device performs wireless transmission of a plurality of most recent sensing results at a time interval equal to or longer than the second decorrelation time; and a determination step in which at least any of the plurality of in-vehicle wireless communication devices determines a state of a channel on the basis of the plurality of sensing results transmitted from the plurality of in-vehicle wireless communication devices.