Patent ID: 8547890

Claim:
A method for power saving in communication between a plurality of sensor apparatuses that are located in-body or on-body to collect bioinformation, and an external management apparatus, comprising: connecting a first sensor apparatus to the management apparatus in a state in which the first sensor apparatus monitors a living body; registering an activation period of the first sensor apparatus, the activation period comprising a first time to change an operation state of the first sensor apparatus from a deactivation state to an activation state, a second time of the activation state, a third time to change the operation state from the activation state to the deactivation state, and a fourth time of a deactivation state; detecting a remaining time until a beacon signal from the management apparatus will be received by the first sensor apparatus; comparing the remaining time and a sum of the first time and the third time; changing the operation state of the first sensor apparatus from the activation state to the deactivation state when the remaining time is longer than the sum of the first time and the third time, and maintaining the operation state in the activation state when the remaining time is less than the sum; detecting a packet for a beacon period in the activation state; and transmitting the bioinformation to the management apparatus at the time when the packet is included and changing the operation state of the first sensor apparatus back to the deactivation state.