Data transceiver and data-transceiving method for bio-implantable medical devices

• US 8,958,314 B2
• Filed: 05/24/2011
• Issued: 02/17/2015
• Est. Priority Date: 05/24/2010
• Status: Expired due to Fees

• Current Assignee: M.I. Tech Co., Ltd. (Synergy Innovation Co., Ltd.)
• Original Assignee: M.I. Tech Co., Ltd. (Synergy Innovation Co., Ltd.)
• Inventors: Lee, Hoseung, Park, Se-Ik, Kim, Sung June
• Primary Examiner(s): Pham, Chi H
• Assistant Examiner(s): Preval, Voster
• Application Number:
  US13/699,834
• Publication Number:
  US 20130070616A1
• Time in Patent Office: 1,365 Days
• Field of Search: 370/350, 370/349
• US Class Current: 370/250
• CPC Class Codes: A61B 5/0031 Implanted circuitry
• CPC Class Codes: A61B 5/6846 specially adapted to be brought in contact with an internal body part, i.e. invasive
• CPC Class Codes: H04L 1/0061 Error detection codes
• CPC Class Codes: H04L 67/12 specially adapted for proprietary or special-purpose networking environments, e.g. medical networks, sensor networks, networks in vehicles or remote metering networks
• CPC Class Codes: H04L 7/10 Arrangements for initial synchronisation
• CPC Class Codes: H04W 56/001 Synchronization between nodes
• CPC Class Codes: H04W 56/0015 one node acting as a reference for the others

Abstract

The invention relates a transmitter for transmitting data in bio-implantable medical devices, comprising: an activation unit which transmits, to a receiver, a predetermined number of frame bits which indicate the start of data transmission so as to activate the receiver; a preamble state notification unit which transmits, at the state where the receiver is activated or during data transmission to the receiver, a preamble data signal for turning the receiver into a preamble state; and a synchronization unit which transmits synchronization data for synchronization between the transmitter and the receiver in the preamble state.

Claims

1. A transmitter for transmitting data in an implantable medical device, the transmitter comprising:

an activation unit configured to transmit a predetermined number of frame bits to a receiver to activate the receiver, the frame bits indicating transmission start of the data;

a preamble state notification unit configured to transmit a preamble data signal for putting the receiver in a preamble state when the receiver has been activated or the data is being transmitted to the receiver; and

a synchronization unit configured to transmit synchronization data for synchronization between the transmitter and the receiver in the preamble state,

wherein the transmitter is configured to transmit a data stream to the receiver, the data stream including body data, frame bits for dividing the body data, and a control signal,

wherein the control signal includes at least said preamble data signal,

wherein the control signal is defined by adding at least one 1-bit logic high or logic low signal after a frame bit of the data stream, and

whereby when the receiver is not yet in synchronization and receives the preamble data from the transmitter, the receiver is switched to the preamble state by a state switch unit of the receiver and, when the receiver is already in synchronization and in the preamble state, the receiver shifts to a state in which the receiver receives data transmitted from the transmitter.

2. The transmitter of claim 1, further comprising a transmission end notification unit configured to transmit a communication end signal for notifying the receiver of end of data transmission when the data is being transmitted to the receiver or the receiver is in the preamble state.

3. The transmitter of claim 2, wherein the communication end signal includes a combination of one frame bit and one logic high signal.

4. The transmitter of claim 1, wherein the synchronization unit is configured to add synchronization data to the preamble data signal at predetermined intervals and transmit it to the receiver, in order for resynchronization between the transmitter and the receiver.

5. The transmitter of claim 1, wherein the preamble data signal includes one frame bit and at least two logic high signals.

6. A receiver for receiving transmission data supplied from a transmitter in an implantable medical device, the receiver comprising:

a state switch unit configured to switch the receiver from a low-power state to an activation state according to a transmission initialization sequence for transmissions start and switch the activation state to the low-power state when a communication end signal for notifying transmission end of the transmission data is received;

an error check unit configured to check whether an error of the transmission data occurs through the use of an error check bit of the transmission data received from the transmitter; and

a preamble state notification unit configured to transmit a preamble data signal for putting the receiver in a preamble state when the receiver has been activated or the data is being transmitted to the receiver, wherein the preamble signal is defined by adding at least one 1-bit logic high or logic low signal after one of the frame bits, and

wherein when the receiver is not yet in synchronization and receives the preamble data from the transmitter, the receiver is switched to the preamble state by a state switch unit of the receiver and, when the receiver is already in synchronization and in the preamble state, the receiver shifts to a state in which the receiver receives data transmitted from the transmitter.

7. The receiver of claim 6, wherein the state switch unit is configured to perform synchronization between the receiver and the transmitter after switching the receiver to the activation state.

8. The receiver of claim 6, wherein the state switch unit is configured to switch the receiver to a preamble state when the preamble data signal is received in the middle of receiving the data from the transmitter after switching the receiver to the activation state.

9. The receiver of claim 8, wherein the state switch unit is configured to switch the receiver to the activation state when synchronization data for synchronization with the transmitter is received after switching the receiver to the preamble state.

10. The receiver of claim 8, wherein the state switch unit is configured to switch the receiver to the low-power state when a communication end signal for notifying a transmission end is received after switching the receiver to the preamble state.

11. A method of transmitting data from a transmitter to a receiver in an implantable medical device, the method comprising:

transmitting channel establishment data and synchronization data to the receiver to activate and synchronize the receiver;

transmitting body data and frame bits for dividing the body data to the receiver synchronized with the transmitter;

transmitting a preamble data signal to switch the receiver to a preamble state in the middle of transmitting the body data, wherein the preamble signal is defined by adding at least one 1-bit logic high or logic low signal after one of the frame bits; and

transmitting resynchronization data for resynchronization to the receiver having the preamble state, or transmitting the body data to the receiver,

wherein when the receiver is not yet in synchronization and receives the preamble data from the transmitter, the receiver is switched to the preamble state by a state switch unit of the receiver and, when the receiver is already in synchronization and in the preamble state, the receiver shifts to a state for resynchronization when the resynchronization data is received from the transmitter.

12. The method of claim 11, further including transmitting a communication end signal for notifying a transmission end to the receiver of the preamble state in the middle of transmitting data or after transmitting the preamble data.

13. The method of claim 11, wherein the preamble data signal includes one frame bit and at least two logic high signals.

14. A method of receiving data transmitted from a transmitter to a receiver in an implantable medical device, the method comprising:

switching, as channel establishment data is received from the transmitter, the receiver from a low-power mode to a start state;

switching, as a preamble data signal is received, the receiver from the start state to a preamble state;

receiving synchronization data in the preamble state to perform synchronization with the transmitter, and receiving body data from the transmitter; and

switching, as the preamble data signal is received in the middle of receiving the body data, the receiver to the preamble state again, and receiving the resynchronization data or the body data from the transmitter,

wherein the data received by the receiver includes body data, frame bits for dividing the body data, and a control signal,

wherein the control signal includes at least said preamble data signal,

wherein the control signal is defined by adding at least one 1-bit logic high or logic low signal after a frame bit of the data stream, and

whereby when the receiver is not yet in synchronization and receives the preamble data from the transmitter, the receiver is switched to the preamble state by a state switch unit of the receiver and, when the receiver is already in synchronization and in the preamble state, the receiver shifts to a state in which the receiver receives data transmitted from the transmitter.

15. The method of claim 14, further comprising switching the receiver to the low-power mode when a communication end signal for notifying a transmission end is received from the transmitter in the preamble state, the start state, or the state that receives the data.

16. A method of controlling a receiver using a transmitter in an implantable medical device, the method comprising:

transmitting, by the transmitter, a control signal that enables state shift of a finite state machine of the receiver, wherein the control signal is defined by adding at least one 1-bit logic high or logic low signal after a frame bit of the data stream,

wherein the control signal comprises;

a preamble data indicator (ID) for providing a time that enables the receiver to prepare to recognize successive body data;

a communication end ID for notifying transmission end of the body data; and

a succession data ID for indicating succession of at least two body data, and

wherein when the receiver is not yet in synchronization and receives the preamble data indicator from the transmitter, the receiver is switched to the preamble state by a state switch unit of the receiver and, when the receiver is already in synchronization and in the preamble state, the receiver shifts to a state in which the receiver receives data transmitted from the transmitter.

17. The method of claim 16, wherein the preamble data ID includes a combination of one frame bit and at least two logic high or logic low signals of 1-bit.

18. The method of claim 16, wherein the communication end ID includes a combination of one frame bit succeeding the body data and one 1-bit logic high signal.

19. The method of claim 16, wherein the succession data ID includes a combination of two frame bits inserted between at least two pieces of successive body data.