Publication

Abstract : Advancement in communication system has resulted in the increase of services provided by different wireless technologies such as WiFi (Wireless Fidelity), LTE (Long Term Evaluation), WiMAX (World Wide inter-Operability for Microwave Access) etc. In a wireless heterogeneous environment, improved handover process is required to access these different services. VHO (Vertical handover) is very important in providing seamless connection and QoS (Quality of Service) over heterogeneous wireless networks such as WiFi, LTE, WiMAX etc. Heterogeneous wireless networks are widely used in telemedicine area as well. Telemedicine plays a very important role in providing healthcare services to remote areas effectively. Vertical handover mechanism becomes very important in providing seamless connection and QoS to send medical data during the mobility of a telemedicine ambulance. The focus of this paper is on VHO between LTE and WiFi technologies. This paper presents a detailed overview of handover mechanisms based on different parameters, between different combination of technologies and it proposes a new vertical handover algorithm for a telemedicine scenario with LTE and WiFi network technologies. The performance of multiple algorithms has been studied and keeping in mind the shortcomings of these algorithms a new algorithm based on RSS (Received Signal Strength), SNR (Signal-to-noise ratio), delay, power consumption and bandwidth has been proposed.