Systems and methods for networked wearable medical sensors
A medical sensor system comprises a gateway comprising a wideband receiver and a narrow band transmitter, the each gateway configured to receive a wideband positioning frame using the wideband receiver from one or more wearable sensors and to transmit acknowledgement frames using the narrow band transmitter that include timing and control data for use by the sensors to establish timing for transmission of the positioning frame; and at least one wearable sensor comprising a wideband transmitter and a narrow band receiver, the sensor configured to transmit a sensor data frame to the gateway using the wideband transmitter and to receive an acknowledgement frame from the gateway using the narrow band receiver, extract timing and control information from the frame, and adjust the timing and synchronization of the wideband transmitter using the timing and control information.
1. A medical sensor system comprising:
a gateway comprising a wideband receiver and a narrow band transmitter, the gateway configured to receive a wideband positioning frame using the wideband receiver from one or more wearable sensors and to transmit acknowledgement frames using the narrow band transmitter that include timing and control information for use by the one or more wearable sensors to establish timing for transmission of the positioning frame; and
at least one of the one or more wearable sensors comprising a wideband transmitter and a narrow band receiver, the at least one wearable sensor configured to transmit a sensor data frame to the gateway using the wideband transmitter and to receive the acknowledgement frame from the gateway using the narrow band receiver, extract the timing and control information from the acknowledgment frame, and adjust timing and synchronization of the wideband transmitter using the timing and control information.
2. The system of claim 1 , wherein the narrow band transmitter and the narrow band receiver are configured to operate in the Industrial Scientific and Medical (ISM) band.
3. The system of claim 2 , wherein the narrow band transmitter and the narrow band receiver are configured to operate at about 2.45 GHz.
4. The system of claim 1 , wherein the wideband receiver and the wideband transmitter are configured to operate in the Ultra Wideband (UWB) spectrum.
5. The system of claim 1 , wherein the gateway is configured to transmit, using the narrow band transmitter, the timing and control information for the wideband transmitter operation.
6. The system of claim 5 , wherein the at least one wearable sensor is configured to receive the timing and control information, synchronize the wideband transmitter and transmit the positioning frame.
7. The system of claim 6 , wherein the gateway is configured to receive the sensor data frame and send information included in the sensor data frame to a remote location.
8. The system of claim 6 , wherein the at least one wearable sensor uses a superframe to communicate with the gateway via the wideband transmitter, and wherein the timing and control information includes super frame information including the start time of the superframe.
9. The system of claim 1 , wherein the at least one wearable sensor is configured to turn on the wideband transmitter for a short duration in order to transmit the positioning frame and then turn the wideband transmitter off.
10. The system of claim 9 , wherein the at least one wearable sensor is further configure to then turn the narrow band receiver on for short period in order to receive the acknowledgement frame form the gateway and then turn the narrow band receiver off.
11. The system of claim 10 , wherein the at least one wearable sensor is configured to attempt re-transmission of the positioning frame when it does not receive an acknowledgement in a certain period of time.
12. The system of claim 1 , wherein the at least one wearable sensor is a temperature sensor.
13. The system of claim 1 , wherein the at least one wearable sensor is a UWB MIR imaging sensor.