초록 ▼

An enhanced mobile communication device, or on-board equipment, communicates according an enhanced ad-hoc mode of communication and an infrastructure mode of communication. A method switches between the enhanced ad-hoc mode of communications and the infrastructure mode of communications. The enhance

An enhanced mobile communication device, or on-board equipment, communicates according an enhanced ad-hoc mode of communication and an infrastructure mode of communication. A method switches between the enhanced ad-hoc mode of communications and the infrastructure mode of communications. The enhanced mobile communication device receives content and updates a geographic database. The enhanced mobile communication device reads the geographic database and transmits content. Data, such as location information from global positioning satellite signals, is collected by the enhanced mobile communication. On-board software of the enhanced mobile communication device communicates with the geographic database for computing routes, paths, and turn-by-turn direction.

대표청구항 ▼

1. A communication method for an enhanced mobile communication device of a participating vehicle, comprising the steps of:(a) operating the mobile communication device in an enhanced ad-hoc mode; (b) detecting when a beacon from one egress point of a plurality of egress points is in range of the mob

1. A communication method for an enhanced mobile communication device of a participating vehicle, comprising the steps of:(a) operating the mobile communication device in an enhanced ad-hoc mode; (b) detecting when a beacon from one egress point of a plurality of egress points is in range of the mobile communication device; (c) switching the mobile communication device from the enhanced ad-hoc mode to an infrastructure mode upon the detection of the beacon; and (d) communicating with only the one egress point. 2. The method of claim 1, further comprising the step of:(e) if the communicating in (d) is no longer possible, switching to the enhanced ad-hoc mode. 3. The method of claim 1, wherein the beacon comprises a first beacon from a first egress point of the plurality of egress points and a second beacon from a second egress point of the plurality of egress points, and further comprising determining the only one egress point with which to communicate by the steps of:(f) decoding the first beacon to determine the location of the first egress point; (g) decoding the second beacon to determine the location of the second egress point; and (h) comparing the locations of the first and second egress points to the location of the participating vehicle; wherein the one egress point is the first egress point if the distance between the location of the first egress point and the current location of the participating vehicle is less than the distance between the location of the second egress point and the current location of the participating vehicle, and wherein the one egress point is the second egress point if the distance between the location of the second egress point and the current location of the participating vehicle is less than the distance between the location between the first egress point and the current location of the participating vehicle. 4. The method of claim 1, further comprising after (b) but before (c) decoding the beacon to determine the location of the one egress point, and comparing the location of the one egress point to a trajectory of the participating vehicle.5. An enhanced mobile communication device for providing communications and navigation in a vehicle, comprising:an extended radio unit, the extended radio unit being configurable for use in an enhanced ad-hoc mode and an infrastructure mode of communication; a microprocessor executing a user space application, wherein the user space application executes a finite state machine, wherein the microprocessor also executes a device driver that generates a MAC signal in response to receipt of a beacon from an egress point by the extended radio unit, wherein the MAC signal is passed to the finite state machine, thereby prompting the finite state machine to initiate a transition from the ad-hoc mode to the infrastructure mode. 6. The enhanced mobile communication device of claim 5, wherein the transition from the ad-hoc mode to the infrastructure mode is delayed if the extended radio is currently communicating in the ad-hoc mode with a second extended radio in a second vehicle.7. The enhanced mobile communication device of claim 5, wherein the extended radio unit signals the device driver when connectivity with the egress point is lost and causes the device driver to switch from the infrastructure mode to the enhanced ad-hoc mode.8. The enhanced mobile communication device of claim 5, wherein the enhanced ad-hoc mode uses adaptive rate control methods and redundant packet retransmission methods at a link layer.9. The enhanced mobile communication device of claim 5, wherein in the enhanced ad-hoc mode the device driver generates no MAC beacons to synchronize with other radios.10. The enhanced mobile communication device of claim 5, wherein the extended radio unit exchanges no authentication, association, power management, control, or management IEEE 802.11 packets with other extended radio units in other vehicles while communicating in the enhanced ad-hoc mode.11. The enhanced mobile communication device of claim 5, wherein the extended radio unit is assigned a fixed channel while communicating in the enhanced ad-hoc mode.12. The enhanced mobile communication device of claim 5, wherein the extended radio unit is assigned a channel while communicating in the enhanced ad-hoc mode, the channel being dynamically assigned based on the position of the vehicle.13. The enhanced mobile communication device of claim 5, wherein the extended radio unit comprises a wireless local area network (WLAN) radio.14. The enhanced mobile communication device of claim 13, wherein the wireless local area network radio is an IEEE 802.11 (Wi-Fi) radio.15. The enhanced mobile communication device of claim 5, wherein the extended radio unit further comprises a wireless wide area network radio (WWAN) for communicating with a central server.16. The enhanced mobile communication device of claim 5, further comprising:a locate position module; an input/output module; an antenna module connected to the extended radio unit; a bus interconnecting the extended radio unit, the input/output module, and the microprocessor. 17. The enhanced mobile communication device of claim 16, wherein the locate position module comprises a global positioning system (GPS) receiver.18. The enhanced mobile communication device of claim 17, wherein the GPS receiver is selected from a differential GPS receiver and an assisted GPS receiver.19. The enhanced mobile communication device of claim 17, wherein the locate position module further comprises a wide area augmentation system and/or a local area augmentation system.20. The enhanced mobile communication device of claim 16, wherein the locate position module comprises one or more optional sensors selected from a speed sensor, a barometer, a gyroscope, a bearing sensor, and an inertial sensor.21. The enhanced mobile communication device of claim 16, wherein the antenna module comprises a pair of dipole antennas, wherein one of the pair of dipole antennas points forwards in the direction of vehicle travel and the other of the pair of dipole antennas points in the opposite direction.22. The enhanced mobile communication device of claim 16, wherein the antenna module is positioned near a vehicle window or on the roof of the vehicle.23. The enhanced mobile communication device of claim 16, wherein the input/output module comprises an input device to allow a user to input information into the enhanced mobile communication device.24. The enhanced mobile communication device of claim 23, wherein the input device comprises one or more of a keypad, a voice recognition device, a button, and a touch screen.25. The enhanced mobile communication device of claim 16, wherein the input/output module comprises an output device to allow a user to receive information from the enhanced mobile communication device.26. The enhanced mobile communication device of claim 25, wherein the output device comprises one or more of a screen, a device for producing voice commands, and a device for producing audible alerts.27. The enhanced mobile communication device of claim 16, wherein the input/output module comprises one or more of an infrared port, a Bluetooth port, a WiFi port, a cellular radio, a serial data port, a USB port, and a parallel data port to allow a user to upload information to and download information from the enhanced mobile communication device.28. The enhanced mobile communication device of claim 16, further comprising a memory or storage that stores processed end unprocessed data.29. The enhanced mobile communication device of claim 16, further comprising:a geographic database stored in a memory or storage device; and on-board software executed by the microprocessor, wherein the on-board software comprises: a navigation module for searching the geographic database for location and direction information, a routing module for determining turn-by-turn directions, a cartographic module for displaying a portion of the geographic database to a user via the input/output module, and a maneuver module for calculating a path. 30. The enhanced mobile communication device of claim 16, further comprising a geographic database stored in a memory or storage device, wherein the geographic database comprises low value content and high and/or medium value content, and wherein the low value content is deleted to free space in the memory or storage device for new content.31. The enhanced mobile communication device of claim 30, wherein the high value content comprises data describing geographical areas where a user travels, the medium value content comprises data describing geographical areas near where the user travels, and the low value content comprises data describing geographical areas far from where the user travels.