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Received Signal Strength based (RSS) horizontal handoff algorithms have been most commonly used by nearly all second generation and third generation wireless networks in a homogeneous environment. Vertical handoffs or network selection algorithms are the terms coined due to integration and interoperability of existing wired and wireless access networks under the umbrella called as 4G. This work takes a thorough review of existing variations of RSS based network selection through vertical handoff between WLAN and Cellular Networks. It further presents innovative performance analysis of these algorithms in terms of number of handoffs by varying velocity of the Mobile Terminal (MT).
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