An Energy Consumption Evaluation of Non-TIM Strategy in IEEE 802.11ah

Abstract

IEEE 80211ah is a low speed and long distance communication protocol which has two modes of operation: one is that stations in RAW need to listen Beacon for data transfer, and the other is that stations in Non-TIM TWT mode need not to synchronous with AP by listening Beacon. 802.11ah with Non-TIM TWT strategy is very suitable for many IoT applications with low speed and low energy consumption. However, there is no further discussion of energy consumption for stations under Non-TIM TWT mode in 802.11ah networks. Therefore, this paper proposes an 802.11ah Non-TIM Implicit TWT simulation which is built with the 802.11 Legacy simulator added to the transmit traffic distribution, Target Wake Time mechanism and Channel Model. This simulation analysis will evaluate energy consumption performance under different IoT applications (agricultural monitoring, smart metering, and industrial automation).