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Optimizing the Handover Procedure in IEEE 802.16e Mobile Wimax Network
Mobile WiMAX bearing the IEEE standard 802.16e-2005 brings wireless broadband to a new dimension due to the support of nomadism. As a result, handover has obviously become a very significant factor in the performance of mobile WiMAX. But because of the presence of unnecessary ranging/scanning in Layer 2 along with the network re-entry procedure enormous handover latency occurs. This threatening handover delay is a huge obstacle for the optimum performance of mobile WiMAX. In this paper various problematic scenarios of handover procedure have been shown with the log file analyzer tool using data from a WiMAX trial network and from that an optimized handoff scheme is proposed associated with suitable pre-scanning algorithm, fast dedicated ranging and pre-registration process. pre-registration process.
Projection based feature extraction process for Bangla script: A modified approach
Classical projection-based feature extraction has its drawbacks due to lack of scale invariance. In this paper, a heuristic approach is proposed that makes the projection based features scale independent as well as more style invariant. A classifier software is used to classify characters from 12 different types of fonts as well as different characters of same the type of font.
An Optimized Method for Scheduling Process of Scanning for Handover in Mobile WiMAX
IEEE 802.16e standard for 4G Cellular Technology-Mobile WiMAX is proposed to support mobility. As a result, handover has become one of the most important QoS factors. Because of lack of clarification in the conventional algorithm for handover process, there exists wastage of channel resource along with undesired delay. Again, it causes significant degradation in the overall system performance. Existing standard for handover includes scanning as one of the most vital processes. But scanning requests without proper response and delayed initiation of scanning only deteriorates the scenario. In this paper, a modification of the scheduling process of scanning is proposed to reduce redundant scanning requests and overall handover operation delay.
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