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Signaling in a medical implant based system

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Title: Signaling in a medical implant based system.
Abstract: Signaling in a medical implant based system. A method includes transmitting bits modulated with a predefined sequence in a band of channels by a first medical transceiver. The method includes transmitting bits modulated with a first predefined sequence of a plurality of predefined sequences by a first medical transceiver. The first predefined sequence is detected by a second medical transceiver when the second medical transceiver enters into an active state. A predetermined action is preformed if the first predefined sequence is detected. ...


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Inventors: Sthanunathan Ramakrishnan, Ganesan Thiagarajan, Divyesh Kumar Shah, Jaiganesh Balakrishnan, Sriram Murali
USPTO Applicaton #: #20120106602 - Class: 375219 (USPTO) - 05/03/12 - Class 375 
Pulse Or Digital Communications > Transceivers

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The Patent Description & Claims data below is from USPTO Patent Application 20120106602, Signaling in a medical implant based system.

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REFERENCE TO PRIORITY APPLICATIONS

This application is a Divisional of and claims priority to U.S. Non-Provisional application Ser. No. 12/536,520 filed Aug. 6, 2009, which claims priority from U.S. Provisional Application Ser. No. 61/086,663 filed Aug. 6, 2008, entitled “Wake-up signaling in MICS implants”, which is incorporated herein by reference in its entirety.

TECHNICAL FIELD

Embodiments of the disclosure relate to signaling in a medical implant based system.

BACKGROUND

A medical implant based system includes a medical controller and a medical implant. The medical implant is present inside body of a living organism and the medical controller is external. Power consumption of the medical implant is one of the major determinants of lifetime of the medical implant. The power consumption in a medical implant transceiver forms a significant portion of the overall power consumption in the medical implant. Hence, it is desired to maximize efficiency of the medical implant transceiver to increase lifetime of the medical implant.

The power of the medical implant transceiver is utilized for performing various functions. In one example, power consumption in the medical implant transceiver is dominated by a listen mode of the medical implant transceiver. In the listen mode (when the implant transceiver listens for the signal), the medical implant transceiver wakes up periodically and searches for presence of a signal in a band of channels. It is desired to minimize time spent by the medical implant transceiver, in the listen mode, for detecting the signal to save power.

A medical controller transceiver selects a channel based on certain parameters and transmits the signal in that channel. The channel, in which the signal is transmitted, is unknown to the medical implant transceiver. Hence, the medical implant transceiver has to scan all channels to detect the signal. Currently, a power measurement technique is used to scan the channels. However, the power measurement technique may not be effective for the signals having low signal strength than the threshold. Further, the power measurement technique is sensitive to filter attenuation and noise. Also, the power measurement technique is prone to false alarms with interference and spurs.

The signal once detected is decoded to determine whether the signal is intended for the medical implant transceiver. It is possible that the medical implant transceiver detects a signal which is not intended for the medical implant transceiver. For example, a signal for associating with a medical controller transceiver is not intended for the medical implant transceiver which is already associated. However, such determination is made at medium access control (MAC) layer at the medical implant transceiver leading to wastage of power. The situation worsens if several controllers are present in an area as the probability of detecting unwanted signals from different medical controllers increases.

SUMMARY

An example of a method includes transmitting bits modulated with a predefined sequence in a band of channels by a first medical transceiver. The method includes detecting the predefined sequence by a second medical transceiver. The method also includes determining presence of a signal if the predefined sequence is detected.

Another example of a method includes transmitting bits modulated with a first predefined sequence of a plurality of predefined sequences by a first medical transceiver. The method includes detecting the first predefined sequence by a second medical transceiver when the second medical transceiver enters into an active state. The method also includes performing a predetermined action if the first predefined sequence is detected.

An example of a system includes a medical implant transceiver. The medical implant transceiver includes a radio frequency receiver that receives a signal. Further, the medical implant transceiver includes a demodulator that demodulates bits of the signal modulated with a predefined sequence. The medical implant transceiver also includes a correlator that correlates the signal with the predefined sequence to detect the predefined sequence and to determine presence of the signal in the channel.

BRIEF DESCRIPTION OF THE VIEWS OF DRAWINGS

In the accompanying figures, similar reference numerals may refer to identical or functionally similar elements. These reference numerals are used in the detailed description to illustrate various embodiments and to explain various aspects and advantages of the disclosure.

FIG. 1 illustrates an environment, in accordance with one embodiment;

FIG. 2 is a flow diagram illustrating a method for determining presence of a signal, in accordance with one embodiment;

FIG. 3 is a flow diagram illustrating a method for signaling, in accordance with one embodiment;

FIG. 4 is an exemplary illustration of a correlation graph, in accordance with one embodiment;

FIG. 5 illustrates a block diagram of a portion of a medical controller transceiver, in accordance with one embodiment; and

FIG. 6 illustrates a block diagram of a portion of a medical implant transceiver, in accordance with one embodiment.



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Industry Class:
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stats Patent Info
Application #
US 20120106602 A1
Publish Date
05/03/2012
Document #
13347893
File Date
01/11/2012
USPTO Class
375219
Other USPTO Classes
International Class
04B1/38
Drawings
4



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