Patent ID: 9313778
Filing Date: 2016-04-12
CPC Classification: G08G,H04L,H04W

Claim Text:
1. A frequency determination method for determining a frequency to be used for communication by a mobile communication apparatus, in a wireless communications system including a database apparatus which stores, for each frequency, a prohibited area which is an area where a licensed user is using radio waves, and the mobile communication apparatus which is capable of wireless communications with the database apparatus; the method comprising: a step in which the mobile communication apparatus acquires location information of the mobile communication apparatus; a step in which the mobile communication apparatus reports the location information to the database apparatus; a step in which the database apparatus determines, for each frequency, a first distance, which is a distance in a first direction to the prohibited area from the location indicated by the reported location information, and a second distance, which is a distance in a second direction to the prohibited area from the location indicated by the reported location information, and generating distance information including the first distance and the second distance; a step in which the database apparatus reports the distance information for each frequency, to the mobile communication apparatus; and a step in which the mobile communication apparatus determines a frequency to be used for communication, on the basis of the reported distance information and a direction of movement of the mobile communication apparatus.