With the rise in population and increase in older people

A WBAN Network is one of the most critical real time networks defined with certain restrictions and constraints. The criticalities of this network are because of the environmental contraints, device restrictions and architectural constraints. These criticalities also raise various issues related to network life, reliability and security. In this paper, an exploration to the WBAN layered model is done. Each layer of this model is here defined along with associated issues relative to different network aspects.

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Abstract-Body Area Networks (BANs) are used in a range of applications. In these networks, the sensor nodes attached to human body collect data and send it to controller node which in turn sends to a Base Station (BS) located at a remote location. The controller nodes in a BAN can be replaced easily, but when it comes to BANs moving in areas like war, it is hard to replace the batteries frequently. So we need to reduce energy requirement of the nodes to increase the network lifetime. Using mobile sensors is one way to reduce energy and controller nodes can send data to sink easily while performing inter-BAN communication where nodes need to act cooperatively to send data to BS using multi-hop communication. In this paper, we have proposed a new clustering algorithm in which probability of a node to become a Cluster Head (CH) is decided by its geographical location and residual energy of the node. Simulations results show that the proposed protocol is better than the existing EDDEEC protocol regarding the delay, energy efficiency, reliability and network lifetime.

The communication in a clustered WBAN is performed at different levels through multiple nodes and controllers. This kind of multi-level involvement of nodes opens the nodes for security leaks. In this paper, a dual level security is integrated using hybrid cryptography method. A hybrid authentication and cryptography based method is defined for identity and information level security. The hybridization of security for clustered WBAN is achieved using RSA and hash key encoder. The RSA is here applied for node to controller for identification and verification whereas SHA is applied for reliable symmetric message encoding for node-to-controller and controller-to-controller communication. The proposed security model is applied in an integrated form to the clustered WBAN network to improve communication reliability. The proposed secure communication model has improved the performance of the network. The simulation is applied on clustered WBANs with different number of WBANs. The comparative simulation results show that the proposed model has effectively improved the packet communication and network life.