Context Based Node Discovery Mechanism for Energy Efficiency in Wireless Networks
Ref: CISTER-TR-130302 Publication Date: Mar 2013
Context Based Node Discovery Mechanism for Energy Efficiency in Wireless NetworksRef: CISTER-TR-130302 Publication Date: Mar 2013
Energy has now become a vital resource in wireless networks. With the introduction of high data rate wireless technologies, advanced wireless devices will be able to support an ever growing demanding for high resource consumption applications (in terms of processing power as well as energy requirement for data transmission) e.g. interactive games, video sharing etc...,and as a result the energy saving mechanisms will be at the forefront of system design. The mobile devices with hybrid character, containing ad hoc and infrastructure access, will need mechanisms that keep them connected in an energy efficient way. Wireless Personal Area Networks (WPANs) has been gaining strong interest for energy compliant communications, especially its application with cooperative and context-aware protocols. These two paradigms working in synergy have produced significant energy reduction to the node/network discovery mechanism which is seen as one of the highest energy consumers in your mobile device. In this chapter, we detail the latest innovations on lightweight node discovery mechanisms for WPANSs. In the first instance we identify the benchmark performance, as it is today; in that the node to be connected to either a cluster or a solitary node, knowledge of the neighboring devices are required to choose a suitable node for cooperative communication which requires exhaustive search resulting in the radio interface being always “on”. Moreover, we advance this by proposing new energy efficient discovery mechanisms that are essential for latching onto the benefits of cooperative mechanims. We present a context based beaconing mechanism both for node discovery and cooperative cluster formation. We exploit the available beacon Information Elements (IEs) of UWB and have proposed a new Context Extraction Function (CxEF). Beyond this, we also present a detailed representation of bit mapping for energy and cooperation in beacons. The chapter is concluded by simulation results, which demonstrate the potential energy saving that can be achieved using the proposed node discovery algorithm based on Context Awareness.
Chapter in book Green Communication for 4G Wireless Systems, River Publishers, Edited: S.
Mumtaz, pp 27-45.