System and method for microlocation sensor communication

• US 10,362,461 B2
• Filed: 12/22/2017
• Issued: 07/23/2019
• Est. Priority Date: 12/27/2016
• Status: Active Grant

• Current Assignee: DENSO Corporation
• Original Assignee: DENSO Corporation
• Inventors: Stitt, Raymond Michael, Smith, Eric John, Zoerner, Tyler Lloyd
• Primary Examiner(s): Nguyen, Hai V
• Application Number:
  US15/852,396
• Publication Number:
  US 20180184268A1
• Time in Patent Office: 578 Days
• Field of Search: 455 412, 455 411
• CPC Class Codes: H04W 4/38 for collecting sensor information
• CPC Class Codes: H04W 4/70 Services for machine-to-machine communication [M2M] or machine type communication [MTC]
• CPC Class Codes: H04W 4/80 Services using short range communication, e.g. near-field communication [NFC], radio-frequency identification [RFID] or low energy communication
• CPC Class Codes: H04W 84/18 Self-organising networks, e.g. ad-hoc networks or sensor networks

Abstract

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.

Claims

1. A method of collecting sensor information with respect to communications between a controller device and a portable device, said method comprising:

transmitting one or more connection parameters pertaining to a communication link between the controller device and the portable device in accordance with a communication protocol;

receiving the one or more connection parameters in at least one sensor device;

repeatedly communicating, at a connection interval, data via the communication link between the controller device and the portable device;

sensing, in the at least one sensor device, one or more characteristics of communications between the controller device and the portable device during the connection interval; and

transmitting sensor information pertaining to the one or more sensed characteristics in a gap time frame within the connection interval.

2. The method of claim 1 wherein the gap time frame within the connection interval is defined between a) an end of communications between the controller device and the portable device during the connection interval and b) a start of a subsequent connection interval.

3. The method of claim 2 wherein the gap time frame is defined between a) an end of communications transmitted from the portable device during the connection interval and b) an end of the connection interval.

4. The method of claim 1 wherein the gap time frame is defined between time frames of portable device communications.

5. The method of claim 1 wherein communications with the plurality of sensor devices are provided in a plurality of gap time frames of the connection interval.

6. The method of claim 5 wherein an announcement packet and a command packet are provided in a first gap time frame of the plurality that is defined at a start of the connection interval before the portable device communicates, and wherein sensor information is provided in a second gap time frame of the plurality that is after the first gap time frame.

7. The method of claim 1 comprising broadcasting the one or more connection parameters to the at least one sensor.

8. The method of claim 1 wherein the communication protocol is Bluetooth Low Energy, and wherein the transmission of sensor information is conducted via Bluetooth Low Energy hardware.

9. The method of claim 1 wherein, for each connection interval, sensor information is collected from the at least one sensor for communications occurring during the connection interval via the communication link.

10. The method of claim 1 comprising sensing in a plurality of sensor devices, one or more characteristics of communications between the master device and the portable device during the connection interval.

11. The method of claim 10 comprising:

obtaining one or more sensed characteristics in a first sensor device from a second sensor device; and

transmitting, from the first sensor device, the one or more sensed characteristics obtained from the second sensor device.

12. The method of claim 11 wherein said obtaining includes obtaining the one or more sensed characteristics during a transmission period in which the first sensor device communicates sensor information pertaining to the one or more sensed characteristics sensed in the first sensor device.