Sam Nguyen-Xuan, Dongwan Kim, Sunshin An, Journal of Internet Computing and Services, Vol. 15, No. 2, pp. 9-18, Apr. 2014
10.7472/jksii.2014.15.2.09, Full Text:
Keywords: Wireless Body Area Networks, Grid Topology, Energy efficient, Packet Delivery Ratio

Abstract

The sensors attached on/in a person are moved since human body frequency changes their activity, therefore in wireless body area networks, nodal mobility and non-line-of-sight condition will impact on performance of networks such as energy efficiency and reliable communication. We then proposed schemes which study on forwarding decisions against frequent change of topology and channel conditions to increase reliable connections and improve energy efficiency. In this work, we control the size of packets, forwarding rate based on ratio of input links and output links at each node. We also robust the network topology by extending the peer to peer IEEE 802.15.4-based. The adaptive topology from chain-based to grid-based can optimal our schemes. The simulation shows that these approaches are not only extending network lifetime to 48.2 percent but also increase around 6.08 percent the packet delivery ratio. The "hot spots" problem is also resolved with this approach.

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