Hierarchical floating car data network
First Claim
1. A hierarchical floating car data network, comprising:
- a central server;
a plurality of fixed egress points that each comprise a wireless local area network (WLAN) radio and a communication link to the central server, wherein the WLAN radio of each fixed egress point transmits a beacon signal; and
a participating vehicle network that comprises a first on-board equipment carried in a first vehicle and a second on-board equipment carried in a second vehicle, wherein the first on-board equipment and the second on-board equipment each comprise a WLAN radio and a locate position module, and wherein the WLAN radios in the first and the second on-board equipments operate in an enhanced ah-hoc communication mode when not in range of the beacon from one of the plurality of fixed egress points and dynamically switch to an infrastructure mode upon the detection of the beacon from one of the plurality of fixed egress points.
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Abstract
A hierarchical floating car data network comprises a central server, an egress point network, and a participating vehicle network. The egress point network is in communication with the central server. The egress point network comprises a plurality of egress points. The participating vehicle network comprises a plurality of participating vehicles. At least some of the plurality of participating vehicles are in direct communication with each other. At least some of the plurality of participating vehicles are in communication with at least some of the plurality of egress points. Furthermore, at least some of the plurality of participating vehicles may be in communication with the central server. A geographic database is formed from content communicated between the elements of the hierarchical floating car data network.
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Citations
21 Claims
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1. A hierarchical floating car data network, comprising:
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a central server; a plurality of fixed egress points that each comprise a wireless local area network (WLAN) radio and a communication link to the central server, wherein the WLAN radio of each fixed egress point transmits a beacon signal; and a participating vehicle network that comprises a first on-board equipment carried in a first vehicle and a second on-board equipment carried in a second vehicle, wherein the first on-board equipment and the second on-board equipment each comprise a WLAN radio and a locate position module, and wherein the WLAN radios in the first and the second on-board equipments operate in an enhanced ah-hoc communication mode when not in range of the beacon from one of the plurality of fixed egress points and dynamically switch to an infrastructure mode upon the detection of the beacon from one of the plurality of fixed egress points. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A hierarchical floating car data network method comprising the steps of:
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transmitting a beacon signal from each of a plurality of fixed egress points; relaying data between a first on-board equipment carried in a first vehicle and a second on-board equipment carried in a second vehicle, wherein the data are communicated using a first wireless local are network (WLAN) radio in the first on-board equipment and a second WLAN radio in the second on-board equipment, and wherein the first and the second WLAN radios operate in an ad-hoc communication mode when not in range of the beacon from one of the plurality of fixed egress points; communicating data between the first on-board equipment and one of the plurality of fixed egress points via an infrastructure communication mode, wherein the first WLAN radio dynamically switches to the infrastructure communication mode upon detection of the beacon from one of the plurality of fixed egress points. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21)
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Specification