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Document Number
US Patent 7272404
Issued Date
September 18, 2007
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Abstract
A first transceiver (4, 30) can position itself by forming an ad hoc network (20) of transceivers which assist the first transceiver in acquiring its position. A dedicated infrastructure such as GPS satellites is not required. The first transceiver (4, 30), once it has acquired its position, can be involved in a network (20) by another transceiver (32, 34, 36, 38, 40) to assist in the positioning of that transceiver. The acquisition of the position may involve factors such as the trustworthiness of the transceivers in the network and/or the positions of transceivers with which the first transceiver cannot directly communicate.
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Number of Claims:
21
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Published
September 18, 2007
Application Number
11/429,937
Filed
May 9, 2006
US Classification
455/456.1   340/825.49 342/386 342/450 342/458 342/463 370/338 370/400 370/408 455/3.01 455/3.05 455/404.2 455/41.2 455/456.2 455/456.6 702/150 702/151 702/152 702/153
Int'l Classification
H04Q   7/20   (20060101)  
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Parent Case
RELATED APPLICATION INFORMATION This application is a divisional application based on co-pending application Ser. No. 10/182,826 filed on Oct. 28, 2002 entitled "Position Acquisition", which is a 371 application from PCT/GB01/00434 filed on Feb. 2, 2001, which is based upon and claims benefit from prior United Kingdom Patent Application No. 0002404.2, filed Feb. 2, 2000, and from United Kingdom Patent Application No. 0019366.4, filed Aug. 7, 2000, the entire contents of both these applications are expressly incorporated herein by reference.
Priority Data
Feb 02, 2000 [GB] 0002404.2 Aug 07, 2000 [GB] 0019366.4
USPTO Field of Search
455/3.01   455/3.05   455/11.1   455/41.2   455/41.3   455/66.1   455/115.3   455/404.2   455/420   455/422.1   455/446   455/448   455/456.1   455/456.2   455/456.6   455/500   370/252   370/254   370/310   370/338   370/351   370/400   370/407   370/408   370/432   342/385   342/386   342/450   342/453   342/457   342/458   342/463   379/102.01   379/102.02   379/102.03   702/150   702/151   702/152   702/153   340/825.36   340/825.49  
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