Boots – shoes – and leggings
Patent
1993-12-23
1995-11-28
Ramirez, Ellis B.
Boots, shoes, and leggings
34082554, 34082549, 34082508, 455 674, G01S 302
Patent
active
054714044
ABSTRACT:
A system to enable individual locator devices or badges developed for location of people or objects to (1) determine whether their identification transmissions are received by sensor stations and to (2) take appropriate actions when the transmissions are not received. Each badge in the system can transmit to any sensor station in the system a request for an acknowledgement within a set interval of time. Each time a sensor station receives a request for acknowledgement from a badge the sensor station sends a message of acknowledgement to the badge. If the badge does not receive an acknowledgement within the set interval of time, the badge takes appropriate action due to its occlusion from the system. If the badge receives an acknowledgement within the interval of time, it resets its internal timer.
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Roy Want and Andy Hopper, "Active Badges and Interactive Computing Objects," Feb. 1992, IEEE Trans. vol. 38, No. 1.
Roy Want etcl., "The Active Badge Location System", Jan. 1992, ACM Transactions on Info; vol. 10, No. 1.
Johnston A. Sidney
Kuta Christine M.
Peeso Thomas
Ramirez Ellis B.
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