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IEEE has introduced a standard on vertical handover known as Media Independent Handover (IEEE 802.21 MIH) which aims to achieve end user mobility by assisting the vertical handover across heterogeneous wireless technologies thus improving end user experience. However, the current MIH standard lacks context-aware architecture which is needed to adapt to the changing network dynamics and mechanisms to distribute load uniformly in the network. In this paper, we propose an enhanced architecture to IEEE 802.21 Media Independent Handover (MIH) framework in heterogeneous wireless networks. In the enhanced MIH framework, we add in a new network element known as Handover Agent(HA) for simplifying handover overhead at mobile nodes and offering more seamless vertical handover to mobile nodes. The proposed architecture addresses several challenges involved in unified heterogeneous network system such as context-aware handover, load balancing and signaling overhead. We also present comparative mathematical analysis of our proposed architecture with respect to the current MIH standard. [ABSTRACT FROM PUBLISHER]

3GPP has introduced LTE Femto cells to handle the traffic for indoor users and to reduce the load on the Macro cells. However, the current LTE Femto based system is not able to utilize the spectrum efficiently. Hence, we propose a new spectrum allocation method which dynamically allocates the spectrum between Macro and Femto cells and dynamically inside Femto regions based on user traffic demands. This method is applicable only for enterprise cellular deployments in which, all Femtos are deployed in a planned manner. [ABSTRACT FROM PUBLISHER]