| 摘要 |
<P>PROBLEM TO BE SOLVED: To a method and apparatus for setting boundaries and marking the positions of obstacles associated with the boundaries for such applications for applications to activities which are played outdoors, for example, a soccer game played within a boundary of the soccer field. <P>SOLUTION: A wireless communications device with positioning capabilities is used to mark the boundary of a virtual operations area, and used to mark one or more obstacles within the boundary. Virtual operations may be conducted by users having a wireless communications device, and the wireless communications device generates an alert when a user violates the boundary or is within a preset proximity to an obstacle. <P>COPYRIGHT: (C)2012,JPO&INPIT |
