发明名称 |
THIN-CLIENT NAVIGATION AND ROUTE GUIDANCE SYSTEM |
摘要 |
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. |
申请公布号 |
WO02069100(A2) |
申请公布日期 |
2002.09.06 |
申请号 |
WO2002US05744 |
申请日期 |
2002.02.25 |
申请人 |
ALK TECHNOLOGIES, INC.;KORNHAUSER, ALAIN, L.;BERNSTEIN, DAVID;HORNUNG, MARK, A. |
发明人 |
KORNHAUSER, ALAIN, L.;BERNSTEIN, DAVID;HORNUNG, MARK, A. |
分类号 |
G09B29/00;G01C21/00;G01C21/34;G08G1/005;G08G1/0969 |
主分类号 |
G09B29/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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