(57) ABSTRACT A system for a frictionless access control automatically identifies users and
enables access to restricted areas of a building for example via access points such as …

An access control system and method for monitoring a public access point are disclosed.
The system includes a positioning unit that tracks locations of users carrying user devices …

(56) References Cited 7.433, 696 B2 10/2008 Dietrich et al. 7.463, 890 B2 12/2008 Herz et
al. US PATENT DOCUMENTS 7,512.462 B2 3/2009 Nichols et al. 7,565,157 B1 7/2009 …

A system and method for video recognition of users in a frictionless access control system
are disclosed. The access control system includes a positioning unit that tracks locations of …

(57) ABSTRACT A system and method for determining tailgating of users in a frictionless
access control system are disclosed. The access control system includes a positioning unit …

The description relates to mobile device location. One example can identify global
navigation satellite system (GNSS) satellites expected to be in line-of-sight of a mobile …

A system and method for a portable device analyzing user information broadcast from target
user devices is disclosed. The portable device includes a commodity user device (eg …

An access control system and method for monitoring an access point are disclosed.
Preferably, a positioning unit of the system includes a primary antenna and a directional …

4,357,593. A 11, 1982 von Tomkewitsch 4,796, 191 A 1/1989 Honey et al. 4,949,268 A 8,
1990 Nishikawa et al. 5,394,333 A 2, 1995 Kao 5,493,692 A 2f1996 Theimer et al. 5,544,321 …

An identification is made as to when a device is at an anchor location, which can be a
proximity Zone along an edge of a dead Zone or a location where a signal from a beacon is …