System and method for interference mitigation in a wireless sensor network
First Claim
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1. A wireless patient monitoring system comprising:
- a plurality of sensor nodes configured to acquire patient data from a patient; and
a gateway device in bi-directional wireless communication with the plurality of sensor nodes for a plurality of defined communication frames, the gateway device configured to transmit a beacon signal to each of the plurality of sensor nodes at each of a plurality of frequencies; and
wherein each of the plurality of sensor nodes are further configured to;
receive the beacon signal from the gateway device; and
transmit the acquired patient data to the gateway device at each of the plurality of frequencies;
wherein the plurality of frequencies comprises a first frequency and a second frequency and the plurality of sensor nodes are further configured to tune to the first frequency to receive the beacon signal and tune to the second frequency if the beacon signal transmitted at the first frequency is not received within a pre-determined time limit; and
wherein the gateway device is further configured to tune to the first frequency to receive the patient data and, if the patient data is not received within a pre-determined time limit, tune to the second frequency.
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Abstract
A wireless patient monitoring system forms a Network Around a Patient (NAP) and includes sensor nodes configured to acquire patient data from a patient. A gateway device is in bi-directional wireless communication with the sensor nodes for a plurality of defined communication frames. The gateway device is configured to transmit a beacon message to the sensor nodes at each of a plurality of frequencies. The sensor nodes are further configured to receive the beacon message from the gateway device and transmit the acquired patient data to the gateway device at each of the plurality of frequencies.
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Citations
23 Claims
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1. A wireless patient monitoring system comprising:
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a plurality of sensor nodes configured to acquire patient data from a patient; and a gateway device in bi-directional wireless communication with the plurality of sensor nodes for a plurality of defined communication frames, the gateway device configured to transmit a beacon signal to each of the plurality of sensor nodes at each of a plurality of frequencies; and wherein each of the plurality of sensor nodes are further configured to; receive the beacon signal from the gateway device; and transmit the acquired patient data to the gateway device at each of the plurality of frequencies; wherein the plurality of frequencies comprises a first frequency and a second frequency and the plurality of sensor nodes are further configured to tune to the first frequency to receive the beacon signal and tune to the second frequency if the beacon signal transmitted at the first frequency is not received within a pre-determined time limit; and wherein the gateway device is further configured to tune to the first frequency to receive the patient data and, if the patient data is not received within a pre-determined time limit, tune to the second frequency. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A method for patient monitoring, comprising:
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arranging a plurality of wireless sensors on a patient to acquire health data therefrom during an operative frame; associating the plurality of wireless sensors with a gateway controller by assigning each of the plurality of wireless sensors to a timeslot within the operative frame; transmitting a beacon signal from the gateway controller to the plurality of wireless sensors to activate the wireless sensors during an operative frame; transmitting the health data from the plurality of wireless sensors to the gateway controller via a plurality of data packets during the operative frame in response to the beacon signal; and sequentially transmitting data packets at the first frequency and then at the second frequency within a first timeslot; wherein at least one of the beacon signal and the data packets are transmitted over a first frequency channel and a second frequency channel during the operative frame; wherein the step of transmitting the health data comprises; in each subsequent timeslot, sequentially transmitting the first and second frequencies in a reverse order from an immediately preceding timeslot. - View Dependent Claims (14, 15)
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16. A method for patient monitoring, comprising:
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arranging a plurality of wireless sensors on a patient to acquire health data therefrom during an operative frame; associating the plurality of wireless sensors with a gateway controller by assigning each of the plurality of wireless sensors to a timeslot within the operative frame; transmitting a beacon signal from the gateway controller to the plurality of wireless sensors to activate the wireless sensors during an operative frame; transmitting the health data from the plurality of wireless sensors to the gateway controller via a plurality of data packets during the operative frame in response to the beacon signal; and wherein at least one of the beacon signal and the data packets are transmitted over a first frequency channel and a second frequency channel during the operative frame; wherein the step of transmitting the health data comprises; sequentially transmitting the data packets from the plurality of wireless sensors during a first sub-frame within the operative frame and over the first frequency channel; and sequentially transmitting the data packets from the plurality of wireless sensors during a second sub-frame within the operative frame and over the second frequency channel, the second sub-frame falling after the first sub-frame within the operative frame.
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17. A method for patient monitoring, comprising:
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arranging a plurality of wireless sensors on a patient to acquire health data therefrom during an operative frame; associating the plurality of wireless sensors with a gateway controller by assigning each of the plurality of wireless sensors to a timeslot within the operative frame; transmitting a beacon signal from the gateway controller to the plurality of wireless sensors to activate the wireless sensors during an operative frame; transmitting the health data from the plurality of wireless sensors to the gateway controller via a plurality of data packets during the operative frame in response to the beacon signal; tuning the plurality of wireless sensors to receive the beacon signal transmitted over the first frequency channel; and tuning the plurality of wireless sensors to receive the beacon signal transmitted over the second frequency channel if the beacon signal transmitted over the first frequency channel is not received within a pre-determined time limit; wherein at least one of the beacon signal and the data packets are transmitted over a first frequency channel and a second frequency channel during the operative frame.
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18. A method for patient monitoring, comprising:
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arranging a plurality of wireless sensors on a patient to acquire health data therefrom during an operative frame; associating the plurality of wireless sensors with a gateway controller by assigning each of the plurality of wireless sensors to a timeslot within the operative frame; transmitting a beacon signal from the gateway controller to the plurality of wireless sensors to activate the wireless sensors during an operative frame; transmitting the health data from the plurality of wireless sensors to the gateway controller via a plurality of data packets during the operative frame in response to the beacon signal; tuning the gateway controller to receive the data packets transmitted over the first frequency channel; and tuning the gateway controller to receive the data packets transmitted over the second frequency channel if the data packets transmitted over the first frequency channel are not received within a pre-determined time limit; wherein at least one of the beacon signal and the data packets are transmitted over a first frequency channel and a second frequency channel during the operative frame.
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19. A wireless sensor communications system comprising:
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a wireless sensor network configured to acquire system data from a monitored system; a controller positioned in proximity to the sensor network and in wireless communication therewith; wherein each of the sensor network and the controller are configured to sequentially transmit and receive wireless signals over a first frequency channel (F1) and over a second frequency channel (F2) and switch between the first frequency channel and the second frequency channel at least once during each of a plurality of communication frames, the wireless finals including an activation signal and system data; and
,wherein the wireless sensor network is further configured to; tune to F1 to receive the activation signal; tune to F2 to receive the activation signal if the activation signal transmitted over F1 is not received within a pre-determined time limit; and transmit the system data to the controller over each of F1 and F2 upon receipt of the activation signal. - View Dependent Claims (20, 21, 22, 23)
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Specification