Traffic-prediction-assisted dynamic bandwidth assignment for hybrid wireless optical networks

Abstract

Hybrid wireless-optical networks provide the inexpensive broadband bandwidth, vital for modern applications, as well as mobility and, scalability required for an access network. However, in order to provide satisfactory Quality of Service (QoS) on such a non-homogeneous network, innovative designs are required. This paper proposes a novel mechanism to significantly improve the delay guarantee, while maintaining throughput, by predicting the incoming traffic to ONUs. Based on the proposed method, two dynamic bandwidth assignment algorithms are proposed. The performance of the proposed algorithms are evaluated by extensive simulations. The results show that the delay bound of delay-sensitive traffic classes, is decreased by a factor of two, while throughput remains the same.

Architectures and Bandwidth Allocation Schemes for Hybrid Wireless-Optical Networks

“…Another approach employing the triple priority method appears in [59], [78]. Three classes are defined, EF, AF, and BE, without, however, providing the way of converging wireless and optical classes together.…”

“…High priority data packets may arrive at the primary buffer without affecting the process of the secondary buffer. This technique is called twostage DBA and it is adopted by the works in [59], [77], [78]. Therein, an intra-ONU scheduling takes place in the hybrid ONU.…”

“…An example of holistic prediction is the traffic-predictionassisted DBA [59], [78] which studies the impact of predicting the incoming traffic in hybrid ONUs in an interesting perspective. By adopting the pre-assignment approach each ONU request not only the actual amount of bandwidth based on the traffic present, but the required bandwidth for transmitting data packets that have not yet arrived in the ONU stemming from the SSs.…”