The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 31, 2011
Filed:
Feb. 14, 2007
Fritz Hohl, Stuttgart, DE;
Fritz Hohl, Stuttgart, DE;
Sony Deutschland GmbH, Berlin, DE;
Abstract
A positioning apparatus for a wireless ad-hoc network that can measure distances between network nodes that are in range and connected to each other. The positioning apparatus can calculate 3D positions of some nodes using the distance values using a relative coordinate system, first by measuring distances to neighbored nodes, receiving and sending distance reports to/from neighbors, by second initially advantageously selecting the set of base nodes to which the coordinate system relates, and by calculating positions of the base nodes and other nodes in the network initially, and by third detecting movements in the network and by calculating positions of the moved nodes. The network can compensate for movements of the base nodes, select the base nodes in an advantageous way, and cope with sleeping nodes, with unreliable communication, and with fluctuating network topologies. Neighbor communication is used only if no node is sleeping.