System and method for communicating biological signal data

• US 20050119535A1
• Filed: 11/24/2004
• Published: 06/02/2005
• Est. Priority Date: 11/27/2003
• Status: Active Grant

• Current Assignee: Nihon Kohden Corporation
• Original Assignee: Nihon Kohden Corporation
• Inventors: Yanagihara, Kazuteru, Ishikawa, Takahisa, Sudo, Kenta
• Granted Patent: US 7,547,280 B2
• Time in Patent Office: Days
• US Class Current: 600/300
• CPC Class Codes: A61B 5/0002 Remote monitoring of patients using telemetry, e.g. transmission of vital signals via a communication network A61B5/07 takes precedence; transmission systems for measured values G08C; transmission H04B; transmission of digital information H04L; wireless communication networks H04W
• CPC Class Codes: A61B 5/369 Electroencephalography [EEG] devices for psychotechnics A61B5/16
• CPC Class Codes: A61B 5/386 Accessories or supplementary instruments therefor
• CPC Class Codes: Y10S 128/92 Computer assisted medical diagnostics

Abstract

A measurement apparatus and a receiver apparatus are communicatively connected in a wireless manner. Biological signal data is obtained from a detector attached on a living body. A data packet is prepared from the biological signal data. A first CRC of the biological signal data is calculated and appended to the data packet. The data packet is periodically transmitted with the first CRC from the measurement apparatus to the receiver apparatus. A second CRC of the data packet received at the receiver apparatus is calculated. The received data packet is verified when the second CRC is coincident with the first CRC. Acknowledgement data is transmitted from the receiver apparatus to the measurement apparatus when the received data packet is verified. The data packet is retransmitted from the measurement apparatus to the receiver apparatus when the acknowledgement data is not received at the measurement apparatus within a prescribed time period from a previous transmission of the data packet. The data packet is stored in a storage when the number of retransmission exceeds a prescribed value.

Claims

1. A system for communicating biological signal data, comprising:

at least one measurement apparatus, comprising a detector, adapted to be attached on a living body to obtain the biological signal data; and

a receiver apparatus, communicatively connected to the at least one measurement apparatus in a wireless manner, wherein;

the measurement apparatus further comprises;

a storage;

a first communicator, operable to periodically transmit the biological signal data as a data packet to the receiver apparatus, and operable to receive acknowledgement data from the receiver apparatus;

an appender, which calculates a first cyclic redundancy check of the biological signal data and appends the first cyclic redundancy check to the data packet; and

a first controller, operable to cause the first communicator to retransmit the data packet when the first communicator does not receive the acknowledgement data within a prescribed time period from a previous transmission of the data packet, and operable to store the data packet in the storage when the number of retransmission exceeds a prescribed value; and

the receiver apparatus further comprises;

a second communicator, operable to receive the data packet from the measurement apparatus, and operable to transmit the acknowledgement data to the measurement apparatus;

a verifier, which calculates a second cyclic redundancy check of the data packet received by the second communicator and verifies the data packet when the second calculated cyclic redundancy check is coincident with the first cyclic redundancy check; and

a second controller, operable to cause the second communicator to transmit the acknowledgement data to the measurement apparatus when the data packet is verified.

2. The system as set forth in claim 1, wherein:

the first controller causes the first communicator to periodically confirm whether the data communication between the measurement apparatus and the receiver apparatus is possible; and

the retransmission is performed in a condition that it is confirmed that the data communication is possible.

3. The system as set forth in claim 1, wherein the measurement apparatus is configured to measure at least one of electroencephalogram, electrocardiogram, electromyogram, respiration waveform and oxygen saturation in arterial blood.

4. A method for communicating biological signal data between a measurement apparatus and a receiver apparatus which are communicatively connected in a wireless manner, the method comprising steps of:

obtaining the biological signal data from a detector attached on a living body;

preparing a data packet from the biological signal data;

calculating a first cyclic redundancy check of the biological signal data;

appending the first cyclic redundancy check to the data packet;

transmitting periodically the data packet with the first cyclic redundancy check from the measurement apparatus to the receiver apparatus;

receiving the data packet at the receiver apparatus;

calculating a second cyclic redundancy check of the received data packet;

verifying the received data packet when the second cyclic redundancy check is coincident with the first cyclic redundancy check;

transmitting acknowledgement data from the receiver apparatus to the measurement apparatus when the received data packet is verified;

retransmitting the data packet from the measurement apparatus to the receiver apparatus when the acknowledgement data is not received at the measurement apparatus within a prescribed time period from a previous transmission of the data packet; and

storing the data packet in a storage when the number of retransmission exceeds a prescribed value.

5. The method as set forth in claim 4, further comprising a step of confirming periodically whether the data communication between the measurement apparatus and the receiver apparatus is possible,

wherein the retransmission is performed in a condition that it is confirmed that the data communication is possible.

6. The method as set forth in claim 4, wherein an amount of data transmitted within a unit time period in the retransmission is greater than an amount of data transmitted within the unit time period in the periodic transmission.

7. A measurement apparatus, communicatively connected to a receiver apparatus in a wireless manner, comprising:

a detector, adapted to be attached on a living body to obtain biological signal data;

a storage;

a communicator, operable to periodically transmit the biological signal data as a data packet to the receiver apparatus, and operable to receive acknowledgement data from the receiver apparatus;

an appender, which calculates a cyclic redundancy check of the biological signal data and appends the cyclic redundancy check to the data packet; and

a controller, operable to cause the first communicator to retransmit the data packet when the first communicator does not receive the acknowledgement data within a prescribed time period from a previous transmission of the data packet, and operable to store the data packet in the storage when the number of retransmission exceeds a prescribed value.

8. A receiver apparatus, communicatively connected to at least one measurement apparatus in a wireless manner, the measurement apparatus being configured to periodically transmit biological signal data as a data packet with a first cyclic redundancy check, the receiver apparatus comprising:

a communicator, operable to receive the data packet from the measurement apparatus, and operable to transmit acknowledgement data to the measurement apparatus;

a verifier, which calculates a second cyclic redundancy check of the data packet received by the communicator and verifies the data packet when the second calculated cyclic redundancy check is coincident with the first cyclic redundancy check; and

a controller, operable to cause the communicator to transmit the acknowledgement data to the measurement apparatus when the data packet received by the communicator is verified.