Patent ID: 7547280

Claim:
A system for communicating biological signal data, comprising: at least one measurement apparatus, comprising a detector, that is 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 that periodically transmits the biological signal data as a data packet to the receiver apparatus, and that receives acknowledgement data from the receiver apparatus; and an appender that calculates a first cyclic redundancy check of the biological signal data and appends the first cyclic redundancy check to the data packet; the receiver apparatus comprises: a second communicator that receives the data packet from the measurement apparatus, and transmits, to the measurement apparatus, acknowledgement data indicative of a receipt of the data packet; a verifier that calculates a second cyclic redundancy check of one 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 of the data packet; and a first controller that causes the second communicator to transmit the acknowledgement data to the measurement apparatus when the data packet is verified, the measurement apparatus further comprises; a second controller that causes 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 that checks to determine if the number of transmissions exceed a prescribed value and stores the data packet in the storage when the number of retransmission of the data packet exceeds a prescribed value.