System and method for microlocation sensor communication
A system and a method to wirelessly synchronize, monitor, or communicate, or a combination thereof, amongst sensors (e.g., sensors, hubs, sensor controllers, etc.) in a Bluetooth Low Energy-based microlocation system. The system or method, or both, may use the BLE hardware (e.g., transmitters, receivers, antennas, etc.) to interleave a communications protocol within the connection interval gaps of the BLE protocol used to communicate with devices.
1 . A method of obtaining sensor information pertaining to a location of a portable device relative to an object, said method comprising:
providing a first command to a first object device, the first command directing the first object device to communicate with the portable device;
conducting, with the first object device based on the first command, first communications with the portable device according to a first schedule of different frequencies;
obtaining, with the first object device, a first sensed characteristic pertaining to the first communications;
providing a second command to a second object device, the second command directing the second object device to monitor the first communications between the first object device and the portable device;
obtaining, with the second object device, a second sensed characteristic pertaining to the first communications;
generating second sensor information based on the second sensed characteristic; and
generating location information about the portable device relative to the object based on the first sensor information and the second sensor information.
2 . The method of claim 1 wherein:
said providing the first command includes communicating the first command from a third object device via a first communication link separate from the first communications between the first object device and the portable device; and
said providing the second command including communicating the second command from the third object device.
3 . The method of claim 2 wherein said providing the second command includes communicating the second command via a second communication link separate from the first communications between the first object device and the portable device.
4 . The method of claim 1 comprising adaptively changing the first schedule of different frequencies based on a first detected characteristic.
5 . The method of claim 1 wherein the first schedule is a first hopping schedule.
6 . The method of claim 5 comprising adaptively adjusting the first hopping schedule based on detected collisions.
7 . The method of claim 1 wherein the first schedule is a frequency map.
8 . The method of claim 1 wherein the first sensed characteristic pertains to a first time of flight with respect to the first communications.
9 . The method of claim 1 wherein:
conducting second communications with the portable device according to a second schedule of different frequencies;
obtaining a second sensed characteristic in a second sensor device, the second sensed characteristic pertaining to the second communications;
generating second sensor information based on the second sensed characteristic; and
generating location information about the portable device relative to the object based on at least one of the first and second sensor information.
10 . The method of claim 9 comprising adaptively changing the second schedule of different frequencies based on a second detected characteristic.
11 . The method of claim 9 wherein the first schedule and the second schedule are the same, and wherein timing for the first communications and the second communications is directed according to the first schedule.
12 . The method of claim 9 wherein the second schedule is a second hopping schedule.
13 . The method of claim 12 comprising adaptively adjusting the second hopping schedule based on detected collisions.
14 . The method of claim 9 wherein the second schedule is a frequency map.
15 . The method of claim 9 wherein the second sensed characteristic pertains to a second time of flight with respect to the second communications.
16 . The method of claim 9 wherein the first communications are at least one of Bluetooth and Ultra-wide Band, and wherein the second communications are at least one of Bluetooth low energy and Ultra-wide Band.
17 . A system for obtaining sensor information from a plurality of object devices pertaining to a location of a portable device relative to an object, said comprising:
a first object device configured to conduct first communications with the portable device based on a first command, the first communications being conducted according to a first schedule of different frequencies, the first object device configured to determine a first sensed characteristic based on the first communications;
a second object device configured to receive a second command and, in response to receipt of the second command, monitor the first communications between the first object device and the portable device, the second object device configured to determine a second sensed characteristic that is based on the first communications;
a processor configured to obtain the first and second sensor information that is based respectively on the first and second sensed characteristics; and
the processor configured to determine the location of the portable device relative to the object based on at least one of the first and second sensor information.
18 . The system of claim 17 comprising a third object device configured to communicate the first command to the first object device via a first communication link separate from the first communications between the first object device and the portable device, the third object device configured to communicate the second command from the third object device.
19 . The system of claim 18 wherein the second command is communicated via a second communication link separate from the first communications between the first object device and the portable device.
20 . The system of claim 17 wherein the first object device is configured to adaptively change the first schedule of different frequencies based on a first detected characteristic.
21 . The system of claim 20 wherein the first schedule is a frequency map.
22 . The system of claim 17 wherein the first schedule is a first hopping schedule.
23 . The system of claim 22 wherein the first object device is configured to adaptively adjust the first hopping schedule based on detected collisions.
24 . The system of claim 17 wherein the first sensed characteristic pertains to a first time of flight with respect to communications between the first object device and the portable device.
25 . The system of claim 24 wherein the second sensed characteristic pertains to a second time of flight with respect to communications between the second object device and the portable device.
26 . The system of claim 17 wherein communications between the portable device and the first object device are at least one of Bluetooth and Ultra-wide Band, and wherein communications between the portable device and the second object device are at least one of Bluetooth low energy and Ultra-wide Band.
27 . The system of claim 17 wherein the second object device is configured to conduct second communications with the portable device based on a third command, the second communications being conducted according to a second schedule of different frequencies, the second object device configured to determine a second sensed characteristic based on the second communications.
28 . The system of claim 27 wherein the first and second schedules are the same, and wherein timing for the first communications and the second communications is directed according to the first schedule.
29 . The system of claim 27 wherein the second object device is configured to adaptively change the second schedule of different frequencies based on a second detected characteristic.
30 . The system of claim 27 wherein the second schedule is a second hopping schedule.
31 . The system of claim 30 wherein the second object device is configured to adaptively adjust the second hopping schedule based on detected collisions.
32 . The system of claim 27 wherein the second schedule is a frequency map.