Burst Fragmentation Model Based on Sequential Burst Allocation Algorithm for Mobile WiMAX
Zaid G. Ali1, R. B Ahmad2, Abid Yahya3
1Zaid G. Ali, School of Computer and Communication Engineering, University Malaysia Perlis, Malaysia.
2Professor R. B. Ahmad, School of Computer and Communication Engineering, University Malaysia Perlis, Malaysia.
3Dr. Abid Yahya, School of Computer and Communication Engineering, University Malaysia Perlis, Malaysia.
Manuscript received on June 03, 2013. | Revised Manuscript received on June 29, 2013. | Manuscript published on July 05, 2013. | PP: 123-129 | Volume-3 Issue-3, July 2013. | Retrieval Number: C1663073313/2013©BEIES
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© The Authors. Published By: Blue Eyes Intelligence Engineering and Sciences Publication (BEIESP). This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/)
Abstract: The downlink Bandwidth resources of WiMAX are allocated by the burst allocation algorithm. The algorithm is responsible for calculating the appropriate location of a number of the smallest unit of bandwidth which is called the slot for all users within the downlink subframe in the form of bursts. Resource wastage in the form of unused and unallocated slots is a real common problem accompanies resource management in the burst allocation algorithms. This paper investigates the Sequential Burst Allocation (SBA) that based on sequential slot allocation and burst fragmentation. An analytical model of frame utilization has been derived. Moreover, this paper presents criteria of burst fragmentation and investigates the effect of burst fragmentation to the allocation efficiency. It has been observed from the results that the SBA algorithm outperforms the Standard (ST) algorithm in term of number of users and resource wastage reduction per frame. The research results illustrates that burst fragmentation can enhance the proportion of frame utilization with minor effect to the overhead size. As well as, the results are useful to be a heuristic guide line for MAC layer scheduler to decide the best burst size that can be used.
Keywords: Burst allocation, Burst fragmentation, Downlink subframe, Overhead, Mobile WiMAX.