Connected vehicle application testing in the laboratory
First Claim
1. A method of testing vehicle-to-vehicle or vehicle-to-roadside unit (V2x) performance, including:
- connecting communication transceivers of first and second on board units (OBUs) to an attenuator network;
connecting positioning signal receivers of the first and second OBUs to one or more GNSS emulators;
controlling the attenuator network and the GNSS emulators with a simulation controller, wherein the simulation controller;
tracks simulated positions of the first and second OBUs;
controls the attenuator network to simulate signal attenuation between the first and second OBUs; and
controls the GNSS emulators to provide signals based on the simulated positions of the first and second OBUs; and
further including logging behavior of the OBUs responsive to a test stimulus.
1 Assignment
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Accused Products
Abstract
The technology disclosed relates to testing of connected vehicle systems. The connections involved are sometimes referred to as Car-2-Car (C2C), Vehicle-to-Vehicle (V2V), Car-2-Infrastructure (C2I), or Vehicle-to-Infrastructure (V2I). More generically, the connections are referred to as C2X and V2X. The technology disclosed provides an over the wire simulation of signals that a system will receive in operation, which allows testing of algorithms, breadboards, prototypes and complete systems. The system simulates the position of multiple on board units as the move with the vehicles that carry them. It attenuates signals between the OBUs and can attenuate signals among the OBUs and other test components, including roadside units and synthetic OBUs. The simulation is can be practiced as a method, a device, or computer readable medium that causes a device to practice the method or that, when combined with appropriate hardware, produces the device.
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Citations
16 Claims
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1. A method of testing vehicle-to-vehicle or vehicle-to-roadside unit (V2x) performance, including:
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connecting communication transceivers of first and second on board units (OBUs) to an attenuator network; connecting positioning signal receivers of the first and second OBUs to one or more GNSS emulators; controlling the attenuator network and the GNSS emulators with a simulation controller, wherein the simulation controller; tracks simulated positions of the first and second OBUs; controls the attenuator network to simulate signal attenuation between the first and second OBUs; and controls the GNSS emulators to provide signals based on the simulated positions of the first and second OBUs; and
further including logging behavior of the OBUs responsive to a test stimulus. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A device for testing on board units (OBUs) and at least one roadside unit (RSU), the device including:
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first and second communication signal ports adapted for connection with first and second OBUs; first and second positioning signal ports adapted for connection with first and second OBUs; an attenuation network that includes individual communication channel attenuation of each communication channel being simulated, wherein the attenuation network is coupled between the communication signal ports; one or more global navigational satellite system (GNSS) emulators coupled to the positioning signal ports; a simulation controller that; tracks simulated positions of the first and second OBUs; controls the attenuator network to simulate signal attenuation on the individual communication channels; controls the GNSS emulators to provide signals based on the simulated positions of the first and second OBUs; and
furtherlogs behavior of the OBUs responsive to a test stimulus. - View Dependent Claims (10, 11, 12)
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13. A non-transitory computer readable medium storing computer program instructions that, when executed on a device connected to an attenuation network that communicatively couples on board units (OBUs), the device further connected to one or more global navigation satellite system (GNSS) emulators that are communicatively coupled to the OBUs, cause the device to:
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track simulated positions of first and second OBUs; control the attenuator network to simulate signal attenuation on the individual communication channels; control the GNSS emulators to provide signals based on the simulated positions of the first and second OBUs; and log behavior of the OBUs responsive to a test stimulus. - View Dependent Claims (14, 15, 16)
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Specification