METHOD FOR TRANSMITTING DATA IN A BLOOD GLUCOSE SYSTEM AND CORRESPONDING BLOOD GLUCOSE SYSTEM
First Claim
1. A method for wireless transmission of data between components of a blood glucose system including a master controller having a receiver and a transmitter, and a slave device comprising an insulin dispensing means and having a receiver and a transmitter, the method comprises the following steps:
- operating the slave device normally in a power saving mode in which its receiver is activated intermittently at a receiver activation frequency, with the receiver each time being activated for a predetermined listening period and the receiver being deactivated for the rest of the time,activating the transmitter of the controller for a transmission period to transmit a communication initiation data frame including a preamble portion which is chosen such that a preamble signal is transmitted for a preamble period, and subsequently activating the receiver of the controller for a response period, andin case the slave device receives the preamble signal during a listening period,a) maintaining the receiver of the slave device active until at least a portion of the remainder of the communication initiation data frame has been received,b) switching the slave device to a communication mode in which the transmitter of the slave device is activated to transmit a response to the controller, andc) switching the slave device from the communication mode to the power saving mode,initially setting the receiver activation frequency to a first frequency value upon switching from communication mode to power saving mode, and setting the receiver activation frequency to a second frequency value smaller than the first frequency value if no communication initiation data frame is received for a predetermined power saving timeout period, whereinthe communication initiation data frame is transmitted such that the preamble period exceeds the length of the cycle duration corresponding to the first frequency value, and, in case no response is received by the controller during the response period, the communication initiation data frame is adapted and retransmitted such that the preamble period is increased and exceeds the length of the cycle duration corresponding to the second frequency value.
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Accused Products
Abstract
The present invention relates to a method for wireless transmission of data between components of a blood glucose system (1, I1) including a master controller (2, 2′) having a receiver (10) and a transmitter (9), and at least one slave device (3) having a receiver (19) and a transmitter (18), and to a corresponding blood glucose system (1, I1). The slave device (3) is normally operated in a power saving mode in which its receiver (19) is only activated intermittently at a receiver activation frequency for a predetermined listening period. The controller (2, 21) transmits a communication initiation data frame to the slave device (3) by means of a signal comprising a preamble signal transmitted for a preamble period. Upon receipt of the communication initiation data frame, the slave device (3) is switched to a communication mode in which it transmits a response to the controller (2, 21), and the slave device (3) is switched from the communication mode to the power saving mode. Initially the receiver activation frequency is set to a first frequency value upon switching from communication mode to power saving mode, and then to a second frequency value smaller than the first frequency value if no communication initiation data frame is received for a predetermined power saving timeout period. The communication initiation data frame is transmitted such that the preamble period exceeds the length of the cycle duration corresponding to the first frequency value, and, in case no response is received by the controller during the response period, the communication initiation data frame is adapted and retransmitted such that the preamble period is increased and exceeds the length of the cycle duration corresponding to the second frequency value.
464 Citations
23 Claims
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1. A method for wireless transmission of data between components of a blood glucose system including a master controller having a receiver and a transmitter, and a slave device comprising an insulin dispensing means and having a receiver and a transmitter, the method comprises the following steps:
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operating the slave device normally in a power saving mode in which its receiver is activated intermittently at a receiver activation frequency, with the receiver each time being activated for a predetermined listening period and the receiver being deactivated for the rest of the time, activating the transmitter of the controller for a transmission period to transmit a communication initiation data frame including a preamble portion which is chosen such that a preamble signal is transmitted for a preamble period, and subsequently activating the receiver of the controller for a response period, and in case the slave device receives the preamble signal during a listening period, a) maintaining the receiver of the slave device active until at least a portion of the remainder of the communication initiation data frame has been received, b) switching the slave device to a communication mode in which the transmitter of the slave device is activated to transmit a response to the controller, and c) switching the slave device from the communication mode to the power saving mode, initially setting the receiver activation frequency to a first frequency value upon switching from communication mode to power saving mode, and setting the receiver activation frequency to a second frequency value smaller than the first frequency value if no communication initiation data frame is received for a predetermined power saving timeout period, wherein the communication initiation data frame is transmitted such that the preamble period exceeds the length of the cycle duration corresponding to the first frequency value, and, in case no response is received by the controller during the response period, the communication initiation data frame is adapted and retransmitted such that the preamble period is increased and exceeds the length of the cycle duration corresponding to the second frequency value. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A blood glucose system comprising
a master controller having a receiver, a transmitter and a control means, wherein the control means is operable to activate the transmitter for a transmission period in order to transmit a communication initiation data frame including a preamble portion such that a preamble signal is transmitted for a preamble period, and to subsequently activate the receiver for a response period, a slave device comprising an insulin dispensing means and having a receiver, a transmitter and a control means, wherein the slave device is adapted to be worn on or to be implanted subcutaneously into the body of a patient such that insulin can be delivered from the slave device to the body of the patient, wherein the control means of the slave device is adapted to operate the slave device normally in a power saving mode in which the control means activates the receiver intermittently at a receiver activation frequency, with the receiver each time being activated for a predetermined listening period and the receiver being deactivated for the rest of the time, and wherein the control means of the slave device is further adapted to determine whether the receiver of the slave device receives the preamble signal during a listening period, and in case the preamble signal is received to a) maintain the receiver of the slave device active until at least a portion of the remainder of the communication initiation data frame has been received, b) switch the slave device to a communication mode in which the control means activates the transmitter of the slave device to transmit a response to the controller, and c) subsequently switch the slave device from the communication mode to the power saving mode, wherein the control means of the slave device is adapted to initially set the activation frequency to a first frequency value upon switching the slave device from communication mode to power saving mode, and to set the activation frequency to a second frequency value smaller than the first frequency value if the receiver does not receive a communication initiation data frame for a predetermined power saving timeout period, wherein the control means of the controller is adapted to effect transmission the communication initiation data frame such that the preamble period exceeds the length of the cycle duration corresponding to the first frequency value, and, in case no response is received during the response period, to adapt and retransmit the communication initiation data frame such that the preamble period is increased and exceeds the length of the cycle duration corresponding to the second frequency value.
Specification