Abstract
The reduction of energy consumption and the successful delivery of data are important for a wireless body sensor network (WBSN). Many studies have been performed to improve energy efficiency, but most of them have not focused on the biosensor nodes in the WBSN bottleneck zone. Energy consumption is a critical issue in WBSNs, as the nodes that are placed next to the sink node consume more energy. All biomedical packets are aggregated through these nodes forming a bottleneck zone. This study proposes a novel mathematical model for body area network topology to explain the deployment and connection between biosensor nodes, simple relay nodes, network coding (NC) relay nodes and the sink node. Therefore, this study is dedicated to research both the energy saving and delivery of data if there is a failure in one of the links of the transmission, which relates to the proposed random linear NC model in the WBSN. Using a novel mathematical model for the WBSN, it is apparent that energy consumption is reduced and data delivery achieved with the proposed mechanism. This study details the stages of the research work.
Highlights
A Wireless Body Sensor Network (WBSN) consists of several biological sensors
In this paper we address the problem of high energy usage of biosensor nodes caused by the bottleneck zone in WBSNs
The design of a novel mathematical model is proposed for body area network topology based on the graph theory, the connection and relationship between the biosensor nodes, simple relay nodes, network coding relay nodes and the sink node are explained in this model
Summary
A Wireless Body Sensor Network (WBSN) consists of several biological sensors. WBANs are used in both medical and non-medical applications. In [15], researchers proposed the decode and forward NC technique to minimise the number of transmissions per node for WBANs while increasing energy efficiency It was assumed the addition of the relay nodes to the network would continue until at least one relay node was in the line of sight for the biosensor nodes and relay nodes. The Energy Consumption Model The energy consumption for communication in the body sensor network are considered in this paper which are the transmission energy and the reception energy as (1) and (2) respectively [19] In the former formula, the Etx represents the transmission energy, ETXelect represents the dissipated radio energy to run the circuit for transmission, kbio represents the number of transmitted biomedical bits, Eamp represents the energy consumption for the transmitter amplifier, n is the path loss coefficient. The transmission link from the bio-medical sensor node to the sink node through a simple relay node and a network code relay node can be expressed as
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