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Review Article

JCR. 2020; 7(4): 825-828


kosaraju Chaitanya, Rachakonda Venkatesh, Mandala Naga Sravya, Narra Harika.

Evolution of communication standards has led to the deployment of heterogeneous environment in terms of various access technologies. In current scenario Long Term Evolution (LTE) and Long Term Evolution- Advanced (LTE- A) are widely deployed in the market and co-exist with previous standards such as 2G and 3G. The technology cycle upgrades digital standard in every two or three years. In this ever changing era of telecommunication, a user expects some sort of stability. Though the advancement in this field, in terms of data rate is breathtaking, it is undesirable to push a user to buy a new device whenever a new standard is introduced. A user would rather, prefer seamless connectivity in such a heterogeneous environment. The challenge in this situation is to select the best network, out of number of available networks, such that the ongoing communication session stays uninterrupted. To solve this problem, we used an algorithm to select the best candidate network, using certain parameters. The algorithm is parted in two categories. In first stage, we consider two candidate networks and identify the overlapped area to which the user is expected to move. Here distance parameter is used to estimate the overlapped region between the two networks. In second stage two important parameters, received signal strength and outage probability, further contributes to the decision of best network selection.

Key words: Handover, Heterogeneous, Network Function, Outage Probability, Overlapped Area.

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