Data processing: vehicles – navigation – and relative location – Navigation – Employing position determining equipment
Reexamination Certificate
2005-05-10
2005-05-10
Nguyen, Tan Q. (Department: 3661)
Data processing: vehicles, navigation, and relative location
Navigation
Employing position determining equipment
C701S201000, C701S210000, C340S995170, C340S995230
Reexamination Certificate
active
06892133
ABSTRACT:
A client/server navigation system utilizes partial route guidance trees, enabling a thin, mobile client to detect route deviation and provide alternate instructions while awaiting response from a server. The system (10) consists of a server (28) containing a network database and route-calculation program; a client (26) capable of obtaining (12) its current location and destination, displaying route instructions (22), and determining when it needs additional instructions from the server (20,24); and communication (30,32,34,36) between the client (26) and server (28). The invention allows for long routes and responsive operation on a small, low-powered client despite lags and lapses in communication.
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Bernstein David
Hornung Mark A.
Kornhauser Alain L.
ALK Technologies, Inc.
Nguyen Tan Q.
Onka, Esq. Thomas J.
Synnestvedt Lechner & Woodbridge LLP
Woodbridge Esq. Richard C.
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