In-vehicle communication system
Examples disclosed herein relate to illustrate an in-vehicle communication system having wireless extension devices, such as an active repeater or an edge reflectarray device. The wireless extension devices operate in coordination to redirect signals within a vehicle.
1. An in-vehicle communication system, comprising:
a plurality of wireless extension devices positioned around a perimeter of a vehicle, the plurality of wireless extension devices adapted to communicate with a wireless network and redirect signals within a vehicle;
an internal reflectarray configured to redirect the signals from at least one of the plurality of wireless extension devices to a location within the vehicle,
wherein the internal reflectarray is a passive device, and the at least one of the plurality of wireless extension devices comprises:
a receive antenna,
a transmit antenna, and
an active relay coupled to the receive antenna and the transmit antenna; and
an in-vehicle control (IVC) unit adapted to receive the signals from the plurality of wireless extension devices, the IVC unit comprising:
a signal detection module; and
a processing unit.
2. The in-vehicle communication system as in claim 1 , wherein the signal detection module activates at least one of the plurality of wireless extension devices in response to a low signal detection at the IVC unit.
3. The in-vehicle communication system as in claim 1 , wherein the plurality of wireless extension devices are active relay devices adapted to increase gain of a received signal and redirect a magnified signal within the vehicle.
4. The in-vehicle communication system as in claim 1 , wherein the receive antenna is a downlink receive antenna; the transmit antenna is an uplink transmit antenna; and the active relay is a downlink active relay coupled to the downlink receive antenna and the uplink transmit antenna.
5. The in-vehicle communication system as in claim 4 , wherein the at least one of the plurality of wireless extension devices further comprises:
an uplink receive antenna;
a downlink transmit antenna; and
an uplink active relay coupled to the uplink receive antenna and the downlink transmit antenna.
6. The in-vehicle communication system as in claim 1 , further comprising multiple passive internal reflectarrays.
7. The in-vehicle communication system as in claim 6 , wherein one of the plurality of wireless extension devices is positioned in a frame of a vehicle.
8. The in-vehicle communication system as in claim 7 , wherein the one of the plurality of wireless extension devices is positioned on a dashboard of the vehicle.
9. The in-vehicle communication system as in claim 7 , wherein the one of the plurality of wireless extension devices is positioned proximate a mirror in the vehicle.
10. A wireless extension system, comprising:
an in-vehicle control (IVC) unit;
at least one edge repeater controlled by the IVC unit and operates to amplify and redirect received signals, wherein the at least one edge repeater comprises a receive antenna, a transmit antenna, and an active relay coupled to the receive antenna and the transmit antenna; and
a passive reflectarray positioned to receive redirected signals from the at least one edge repeater, wherein the passive reflectarray is a meta-structure (MTS) device comprising a plurality of different sized MTS elements.
11. The wireless extension system as in claim 10 , wherein the passive reflectarray is positioned to receive redirected signals from a second edge repeater.
12. The wireless extension system as in claim 11 , wherein a plurality of edge repeaters is positioned on a perimeter of a vehicle.
13. The wireless extension system as in claim 12 , wherein the IVC unit further comprises:
a signal detection unit adapted to detect low amplitude wireless signals from a base station; and
a processing unit responsive to detection of signals below a threshold.
14. The wireless extension system as in claim 13 , wherein the passive reflectarray comprises a plurality of reflective elements.
15. The wireless extension system as in claim 14 , wherein the at least one edge repeater is an MTS device.
16. The in-vehicle communication system as in claim 1 , wherein the IVC unit further comprises an angle of arrival (AoA) detection mechanism.
17. The in-vehicle communication system as in claim 1 , wherein the passive device has no active components.
18. A wireless extension system, comprising:
an in-vehicle control (IVC) unit positioned in a vehicle;
an edge repeater positioned on a perimeter of the vehicle, wherein the edge repeater is controlled by the IVC unit and configured to amplify and redirect received signals; and
a passive reflectarray positioned to receive redirected signals from the edge repeater, wherein the passive reflectarray is a meta-structure (MTS) device, and wherein the IVC unit comprises:
a signal detection unit adapted to detect low amplitude wireless signals from a base station; and
a processing unit responsive to detection of signals below a threshold.
19. The wireless extension system as in claim 18 , wherein the passive reflectarray comprises a plurality of different sized MTS elements.
20. The wireless extension system as in claim 18 , wherein the IVC unit further comprises an angle of arrival (AoA) detection mechanism.