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.

1 - 8 . (canceled) 
     
     
         9 . A method comprising:
 transmitting bits modulated with a first predefined sequence of a plurality of predefined sequences by a first medical transceiver;   detecting the first predefined sequence by a second medical transceiver when the second medical transceiver enters into an active state; and   performing a predetermined action if the first predefined sequence is detected.   
     
     
         10 . The method as claimed in  claim 9  and further comprising:
 determining the plurality of predefined sequences based on autocorrelation and cross-correlation properties. 
 
     
     
         11 . The method as claimed in  claim 9  and further comprising:
 dividing a location comprising multiple first medical transceivers into cells; 
 assigning a predefined sequence of the plurality of predefined sequences for modulating the bits for association to the cells; and 
 assigning other predefined sequences of the plurality of predefined sequences to the cells for modulating bits for a predefined function, wherein no two adjacent cells have a similar predefined sequence for modulating the bits for the predefined function. 
 
     
     
         12 . The method as claimed in  claim 9 , wherein the detecting comprises:
 detecting the first predefined sequence at a physical layer of the second medical transceiver.   
     
     
         13 . The method as claimed in  claim 9 , wherein performing the predetermined action comprises:
 determining presence of a signal for association if the first predefined sequence is detected.   
     
     
         14 . The method as claimed in  claim 13  and further comprising:
 processing the signal for association; and 
 sending an acknowledgment based on the processing. 
 
     
     
         15 . The method as claimed in  claim 14  and further comprising:
 transmitting information identifying a predefined sequence of the plurality of predefined sequences that the first medical transceiver will use to transmit data. 
 
     
     
         16 . The method as claimed in  claim 9 , wherein performing the predetermined action comprises one of:
 determining presence of a poll signal if the first predefined sequence is detected; and   determining presence of a signal for data transfer if the first predefined sequence is detected.   
     
     
         17 . A system comprising:
 a medical implant transceiver comprising
 a radio frequency receiver that receives a signal; 
 a demodulator that demodulates bits of the signal modulated with a predefined sequence; 
 a correlator that correlates the signal with the predefined sequence to detect the predefined sequence, that determines presence of the signal in the channel. 
   
     
     
         18 . The system as claimed in  claim 17  and further comprising:
 a medical controller transceiver comprising
 a predefined sequence spreader that spreads the bits with the predefined sequence; 
 a modulator that modulates the bits with the predefined sequence; and 
 a radio frequency transmitter that transmits the bits. 
 
 
     
     
         19 . The system as claimed in  claim 17 , wherein the medical implant transceiver further comprises:
 a peak-to-off-peak signal to noise ratio detector that detects the predefined sequence.