METHOD AND SYSTEM FOR ENERGY EXPENDITURE DECISION BASED ON USER PRIORITY IN WIRELESS BODY SENSOR NETWORK

摘要

The present invention relates to a method and system for determining the energy consumption of a device according to a user priority in a wireless human body sensor network, the method for determining the energy consumption of a device according to a user priority in a wireless human body sensor network of the present invention, User prioritization method for reducing energy consumption in IEEE 802.15.6 MAC protocol for wireless human sensor network environment, when it is determined that successful acknowledgment message record about data communication between transmitter and receiver is not stored in receiver Determining whether the data to be transmitted is data of user priorities 0 to 6 in a table of user priorities according to the traffic of the IEEE 802.15.6 standard, in consideration of the energy consumption limit and the current channel state; If the data to be transmitted is data between user priorities 0 and 2, freezing a back off reduction process; If the data to be transmitted is data between user priorities 3 to 6, the priority determination factor value α of Equation 1 below is adjusted to determine whether to transmit data between priorities 3 to 6. step; Storing, at the transmitter, a successful acknowledgment message record in the set channel state table and updating the channel state table at each set time; And determining the total energy consumption of one transmitter by reflecting at least one of a back off process, channel sensing, transmission, and retransmission, wherein the prioritization factor value is a value adjusted according to Equation 2 below. A method for determining energy consumption of a device according to user priority in a wireless human sensor network. Equation 1 Here, CW _min is the minimum value of the contention window, CW _max is the maximum value of the contention window, α is a prioritization factor value, and the prioritization factor value is a number between 0 and 1. Equation 2 Where ef is the energy factor value and the energy factor value is a number between 0 and 1.