Review of Vertical Handoff Algorithms in 4G – Networks

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Payaswini P
Manjaiah D.H


4G refers to the fourth generation of cellular wireless standards which is designed to facilitate improved wireless capabilities, network speeds, and visual technologies. It is an IP-based infrastructure with the support of heterogeneous access technologies which provides user best network connectivity. In 4G network user allowed to handover between networks with different types access technologies supporting vertical handoff. Due to this reason mobility management becomes a complex issue. Therefore Vertical handover decision (VHD) algorithms are essential components of the architecture of the 4G - networks. The main challenge while designing a vertical handover algorithm is minimizing handoff latency and packet drop keeping required level of Quality of Service (QoS). In this paper, we provide a complete survey of the VHD algorithms designed to satisfy these requirements along with their classification.

Key words: 4G – Networks, Mobility Managements, Vertical handoff, Handoff performance, fuzzy logic, etc.


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