JOURNAL OF FACULTY OF ENGINEERING & TECHNOLOGY, Vol 17, No 1 (2010)

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A Novel Handover Algorithm for Mobile WiMAX

Naima Rehmani, Abid Ali Minhas

Abstract


For the end user mobility is one of the distinctive values that wireless technology offers. One of the main mobility challenges is to maintain an ongoing session without interruption, while on the move, even at vehicular speeds. This challenge is referred to as handoff, commonly known as Handover (HO). Performing HO well is critical to providing a good user experience. It is one of the key issues for every mobile network. Whether it's GSM Network, UMTS, or Mobile WiMAX, HO is equally important. This paper presents a new method to upgrade performance of HO. This novel mechanism of HO follows HO recommendations in the Institute of Electrical and Electronics Engineers (IEEE) 802.16e system i.e. cell reselection via scanning, HO decision, initiation and network entry including synchronization and ranging with a target Base Station (BS). This paper demonstrates performance metrics of HO via simulation and the steps involved in it from one BS to other BS for successful HO. This proposed HO algorithm takes latency as a key metric to evaluate, as it has direct impact on application performance perceived by a user. Simulation experiments have revealed that our approach has decreased HO latency for Network Entry Time while minimizing HO Process.


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Faculty of Engineering & Technology

University of the Punjab

Lahore-54590-Pakistan