Abstract: Relative positions of a plurality of mobiles communication devices, which form a wirelessly networked group of mobiles, are determined at each of the mobiles of the group without the need for external positioning information obtained from a location remote from the actual locations of the mobiles of the group. The relative positions are determined at the mobiles of the group based on mobile-to-mobile range measurements, distance and direction of movement measurements and altitude measurements made at the respective mobiles.

Abstract: Absolute positions of global position system (“GPS”) enabled mobile communications devices, which form a wirelessly networked group of GPS mobiles, can be determined at each of the mobiles based on use of wireless communications capabilities of the mobiles for obtaining relative positioning information or range measurements for the mobiles of the group. Although each of the mobiles of a group cannot establish line of sight (“LOS”) communications signal reception paths with more than three GPS satellites to permit each mobile to determine its absolute position solely based on GPS signal transmissions, the mobiles can compute their respective absolute positions and the absolute positions of other mobiles if a predetermined number of LOS paths can be established and range or relative positioning information can be obtained.