Apparatus and method of position determination using shared...

Details Apparatus and method of position determination using shared... Apparatus and method of position determination using shared...

2006-08-01

2006-08-01

Issing, Gregory C. (Department: 3662)

Communications: directive radio wave systems and devices (e.g.,

Directive

Including a satellite

C342S357490

Reexamination Certificate

active

07084809

ABSTRACT:
A hybrid position determination system is disclosed. A mobile device may determine a number of pseudo ranges based on a first position determination system, such as a Global Positioning System. In instances where the position of the mobile device is underdetermined because of an insufficient number of satellite pseudo ranges, the mobile device shares position information with other devices. The other devices may include other mobile devices. A first mobile device may determine its position based on an underdetermined number of satellite pseudo ranges by determining pseudo ranges to other mobile devices. In other embodiments, the number of satellite pseudo ranges may be insufficient to generate an absolute position determination of a single mobile device. In this underdetermined condition, mobile devices may determine a common location of the group or may determine a relative positioning of members of the group.

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Sanchez, Ricardo et al, “RDRN: A Prototype for a Rapidly Deployable Radio Network,” ACM Mobile COmputing and Communications Review, vol. 2, No. 2, 1998, pp. 1-8.

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