Patent ID: 11862000
Assignee: VERIZON PATENT AND LICENSING INC.
Field: Control (Instruments)
Classification: CPC G | IPC G

Claim 5:
6. The method of claim 5, wherein determining whether the person is entering or exiting the zone over the time period comprises:
determining, at a first time, a first phase associated with a first access point of the one or more access points;
determining, at the first time, a second phase associated with a second access point of the one or more access points;
calculating a first phase difference based on the first phase and the second phase;
determining, at a second time, a third phase associated with the first access point;
determining, at the second time, a fourth phase associated with the second access point;
calculating a second phase difference based on the third phase and the fourth phase; and
determining whether the person is entering or exiting the zone based on the first phase difference and the second phase difference.