Abstract: The increasing consumer demand for access to communication services anywhere and anytime is accelerating the technological development towards the integration of various wireless technologies, such as, Radio networks, Wi-Fi, WiMAX and cellular systems, which is called as heterogeneous networks. The wireless systems provide higher data rates, high speed, and allow global roaming among a diverse range of wireless access networks. In such a heterogeneous wireless environment, energy minimization is a promising process. In this thesis, some important problems within the heterogeneous networks are addressed, with an emphasis on the efficient use of the system parameters, to achieve certain application specific objectives. In this thesis, a novel approach for the design and implementation of a multi-layered energy minimization technique for heterogeneous wireless networks is presented. In general, energy management is performed in different phases, in the routing phase, channel selection phase, Network selection, and signal processing. An efficient, routing algorithm with ON/OFF/IDLE state selection algorithm is proposed, which focuses on the first three steps is developed. In literature, Energy consumption analysis and minimization in heterogeneous wireless network has several problems, such as on/off scheduling, network selection etc., Energy minimization is the toughest task and this is mandatory in wireless networks to improve the network performance. This thesis handles the energy consumption analysis and minimization in heterogeneous networks using new dynamic programming and m-layer architecture. However several researches have been done and addressed the energy consumption task in different wireless networks. But the proposed system is concentrating a hybrid approach for the energy reduction technique in HetNets. The experiments and results show the proposed system increases the energy consumption rates than the existing systems effectively.

Keywords: Energy minimization, heterogeneous wireless network, Ad-hoc networks, Wireless LAN, cellular networks, cell-association, on-off schemes.