Radio telephone system for moving vehicles - uses service area divided into triangular zones each consisting of hexagonal regions

摘要

The radio telephone system for moving vehicles uses a service area divided up in regions (A,B,C etc) each made up of areas formed in a cellular manner. The central zone consists of six equilateral triangles (1 to 6) which together form a hexagonal transmission zone, each with transmitting and receiving aerials. Each triangle controls a region (e.g.B) made up of a set of interlocking hexagonal areas. As a vehicle travels outwards from the central triangle (2) corresp. to this region, signals are received more strongly than from those in other regions (e.g.A or C) giving a good indication of the position of the vehicle.