Polling algorithm based on traffic burst characteristics of broadband wireless access systems |
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Authors: | Xiu-yuan Li Wei Li Xiao-juan Wu Yun-feng Zhang |
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Institution: | [1]School of Computer Science and Technology, Shandong Economy University, Jinan 250014, China [2]School of Information Science and Engineering, Shandong University, Jinan 250100, China [3]Shandong Provincial Key Laboratory of Digital Media Technology, Jinan 250014, China |
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Abstract: | In this paper, we propose a novel polling algorithm to decrease the number of idle slots and collission slots during the polling
cycle by evaluating the bandwidth request of the subscribe stations (SSs) in the next polling cycle for broadband wireless
access (BWA) systems. We firstly analyze the feature of silent time intervals and deduce the Hurst index which symbolizes
the degree of self-similarity and long-relative nature. Then we represent the inactive OFF time intervals by the Pareto model
and estimate the shape parameter α by the group measured data. Finally we can evaluate the transmission probability of a silent SS before the next polling cycle.
By this algorithm, we can find the optimal transmission opportunities for the base station (BS) to achieve the least collision
or void timeslots in order to achieve the largest bandwidth efficiency. The theoretical analysis and simulation results show
that this polling algorithm can improve the performance for BWA system. |
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