Pedestrian detection
AssigneeHarman International Industries, Incorporated
InventorsZeng Yang, Qingshan Zhang, Guoxia Zhang
Life of this patent
Estimating the term…
Abstract
Wi-Fi based position information communicating methods, vehicle mounted communication devices, and pedestrian devices are provided. One of the methods includes: a communication device mounted on a first vehicle determining whether position information of a second vehicle, whose distance to the first vehicle is shorter than a first predetermined distance, is received within a first predefined time period; and if no, broadcasting position information of the first vehicle in a first 802.11 management frame. By employing the methods, pedestrian detection rate may be improved and wireless channel congestion may be mitigated.
Claims15
A Wi-Fi based position information communicating method, comprising:
- determining, with a communication device mounted on a first vehicle, whether position information of a second vehicle is received within a first predefined time period;
- if no position information of the second vehicle is received within the first predefined time period, broadcasting position information of the first vehicle in a first 802.11 management frames receiving position information of a first pedestrian device from the first pedestrian device;
- after receiving the position information of the first pedestrian device, defining a second time period;
- determining whether position information of a second pedestrian device is received from other vehicles in the second time period;
- and
- if no position information of the second pedestrian device is received from the other vehicles in the second time period, broadcasting the position information of the first pedestrian device in a second 802.11 management frame.
A Wi-Fi based position information communicating method, comprising:
- after receiving position information of a first pedestrian device from the first pedestrian device, broadcasting, with a communication device mounted on a first vehicle, the position information of the first pedestrian device in a first 802.11 management frames;
- after receiving the position information of the first pedestrian device from the first pedestrian device, defining a first time period;
- determining whether position information of a second pedestrian device is received from other vehicles in the first time period;
- and
- if no position information of the second pedestrian device is received from the other vehicles in the first time period, broadcasting the position information of the first pedestrian device in the first 802.11 management frame.
A communication system mounted on a first vehicle, comprising:
- a receiver;
- a transmitter;
- and
- a processing device configured to:
- determine whether position information of a second vehicle, whose distance to the first vehicle is shorter than a first predetermined distance, is received by the receiver within a first predefined time period;
- if no position information of the second vehicle is received within the first predefined time period, control the transmitter to broadcast position information of the first vehicle in a first 802.11 management frames;
- after position information of a first pedestrian device is received from the first pedestrian device by the receiver, define a second time period;
- determine whether position information of a second pedestrian device is received from other vehicles by the receiver in the second time period;
- and
- if the position information of the second pedestrian device is not received from the other vehicles by the receiver in the second time period, control the transmitter to broadcast the position information of the first pedestrian device in a second 802.11 management frame.
Dependencies are inferred from the claim text.