Patent ID: 7409220
Filing Date: 2008-08-05
Classification: G01S,H04W

Abstract:
1. A location determining system, comprising: first, second and third routers, adapted for placement in a relatively horizontal plane in a bounded area, such that a first direction intersecting the first and second routers is about perpendicular to a second direction intersecting the first and third routers, and each of the first, second and third routers being adapted to communicate in a wireless multihopping network to exchange location information with each other pertaining to their respective locations relative to each other; at least one movable device, adapted to communicate with the first, second and third routers in the wireless multihopping network to exchange with the first, second and third routers location information pertaining to its location; and a monitoring device, adapted to receive the location information pertaining to the first, second and third routers and the movable device and to establish, based on the received location information, a reference system identifying the respective locations of the first, second and third routers and the movable device relative to each other within the bounded area.