ESTABLISHING A COMMUNICATION SESSION BETWEEN AN IMPLANTABLE MEDICAL DEVICE AND AN EXTERNAL DEVICE USING A BURST PERIOD AND A SNIFF INTERVAL
First Claim
1. A method of establishing communication between an external device and an implantable medical device, wherein the external device sends a burst for a first length of time with an interval between bursts of a second length of time that is shorter than the first length of time until receiving a response from the implantable medical device, the method comprising:
- sniffing by the implantable medical device for a third length of time with an interval between sniffs of a fourth length of time until receiving a burst from the external device during the sniffing, wherein the third length of time is less than the second length of time and wherein the fourth length of time is less than the first length of time and greater than the second length of time; and
after receiving the burst, providing the response from the implantable medical device.
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Accused Products
Abstract
Communication sessions between an external device and an implantable medical device are established by the initiating device periodically transmitted bursts of energy and with the device that is the target of the bursts periodically sniffing for the transmitted bursts of energy. A silent period between bursts may be established and the sniff interval is chosen to avoid repetitively sniffing during the silent period. The length of the bursts may be chosen to reduce the delay in establishing the communications and/or to reduce the power consumption. The implantable medical device may use multiple modes of operation where in some modes the implantable medical device sniffs and in another mode the implantable medical device transmits bursts. The sniff interval for the implantable medical device may vary depending upon the mode. The burst length may vary depending upon whether the external device or the implantable device is transmitting the bursts.
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Citations
26 Claims
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1. A method of establishing communication between an external device and an implantable medical device, wherein the external device sends a burst for a first length of time with an interval between bursts of a second length of time that is shorter than the first length of time until receiving a response from the implantable medical device, the method comprising:
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sniffing by the implantable medical device for a third length of time with an interval between sniffs of a fourth length of time until receiving a burst from the external device during the sniffing, wherein the third length of time is less than the second length of time and wherein the fourth length of time is less than the first length of time and greater than the second length of time; and after receiving the burst, providing the response from the implantable medical device. - View Dependent Claims (2, 3, 4, 5, 9, 10)
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6. A method of establishing communication between an external device and an implantable medical device, wherein the external device sends a burst for a first length of time with an interval between bursts of a second length of time that is shorter than the first length of time until receiving a response from the implantable medical device, the method comprising:
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sniffing by the implantable medical device for a third length of time with an interval between sniffs of a fourth length of time until receiving a burst from the external device during the sniffing, wherein the third length of time is less than the second length of time and wherein the fourth length of time is greater than the sum of the first length of time and the second length of time and is not a multiple of the sum of the first length of time and the second length of time; and after receiving the burst, providing the response from the implantable medical device. - View Dependent Claims (7, 8)
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11. A method of establishing communication between an external device and an implantable medical device, wherein the external device sniffs for a first length of time with an interval between sniffs of a second length of time that is longer than the first length of time until receiving a burst from the implantable medical device, the method comprising:
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sending a burst by the implantable medical device for a third length of time with an interval between bursts of a fourth length of time until receiving a response from the external device, wherein the third length of time is less than the second length of time and greater than the first length of time and wherein the fourth length of time is greater than the second length of time; and receiving the response at the implantable medical device from the external device. - View Dependent Claims (12, 13, 14, 15)
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16. An implantable medical device, comprising:
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communication circuitry that exchanges communication signals with an external device; and a processor that implements at least a first and a second mode to control the communication circuitry, wherein during the first and second modes the external device sends a burst for a first length of time with an interval between bursts of a second length of time that is shorter than the first length of time until receiving a response from the implantable medical device, and during the first mode, the processor triggers sniffing by the communication circuitry for a third length of time with an interval between sniffs of a fourth length of time until receiving a burst from the external device during the sniffing, wherein the third length of time is less than the second length of time and wherein the fourth length of time is less than the first length of time and greater than the second length of time, during the second mode the processor triggers sniffing by the communication circuitry for the third length of time with an interval between sniffs of a fifth length of time until receiving the burst from the external device during the sniffing, wherein the fifth length of time is greater than the sum of the first length of time and the second length of time and is not a multiple of the sum of the first length of time and the second length of time, and after receiving the burst, providing the response from the communication circuitry. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 26)
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24. An external device for communication with an implantable medical device, comprising:
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communication circuitry that exchanges communication signals with the implantable medical device; and a processor that controls the communication circuitry, wherein the processor triggers the communication circuitry to sniff for a first length of time with an interval between sniffs of a second length of time that is longer than the first length of time until receiving a burst from the implantable medical device, while the implantable medical device sends a burst for a third length of time with an interval between bursts of a fourth length of time until receiving a response from the external device, wherein the first length of time is less than the third length of time, and wherein the second length of time is greater than the third length of time, is less than the fourth length of time, and is not a multiple of a sum of the third length of time the fourth length of time. - View Dependent Claims (25)
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Specification