Improving energy efficiency in wireless body area network

The effectiveness of wireless body area networks (WBANs) is primarily influenced by service quality and energy efficiency. Because of the variations of movements in the human body, the network environment of WBAN varies quickly, and energy is constrained by the compact size of the sensors. To decrease power consumption and increase network lifespan, numerous studies have demonstrated interest in developing energy-efficient transmission techniques. In this paper an optimal approach for the size of data frame and the time of sampling of sensor nodes are proposed to address these concerns. Also, the source node typically lacks the power and transmission range needed to send packets of data directly to the sink node in a WBAN. Data must therefore be transmitted via the multi-hop mechanism from the source node to the sink node. While a relay node is required for multi-hop communication to pass the source data to the sink, single-hop communication allows the source node to connect directly with the sink nodes without the need for relay node. As a result, setting up WBANs is the responsibility of sensor nodes. Thus, in this paper we compare the performance of this approach in single hop networks and multi hop networks.