CPC Class H04W

Techniques for tracking an evacuation of a location in an environment that utilizes physical tokens to prove physical presence at the location are presented. The techniques include receiving data representing of subordinates of an evacuation facilitator; receiving physical token based location status information for at least one of the subordinates, where the physical token based location status information is based on electronic readings of the physical tokens; determining based on the physical token based location status information, a physical presence status at the location for the at least one of the subordinates; receiving evacuation status information for each of the at least one of the subordinates that has a physical presence status that indicates a presence at the location; and recording the evacuation status information for each of the at least one of the subordinates that has a physical presence status that indicates a presence at the location.

A device searching method includes a first device that obtains a relative location between a second device and the first device is based on location information of the first device and the location information of the second device; if it is determined, based on the relative location, that the second device is not within a shooting range of the first device, the first device indicates to move the first device toward the second device until the second device is within the shooting range of the first device; and the first device highlights the area in which the second device is located in the shooting range of the first device.

A base station (10) according to an embodiment includes a data processing unit (101) and a wireless signal processing unit (103). The data processing unit (101) generates a MAC frame. The MAC frame includes input data and an identification bit (CB). The identification bit (CB) indicates that data is extended broadcast data. The wireless signal processing unit (103) converts the MAC frame into a wireless signal to distribute the wireless signal.