Abstract
In a typical 10G-Passive Optical Network (XG-PON), the propagation delay between the Optical Network Unit (ONU) and Optical Line Terminal (OLT) is about 0.3 ms. With a frame size of 125 μs, this amounts to three frames of data in the upstream and three frames of data in the downstream. Assuming no processing delays, the grants for any bandwidth requests reach the ONU after six frames in this request-grant cycle. Often, during this six-frame delay, the queue situation is changed drastically, as much, more data would arrive in the queue. As a result, the queued data that is delayed loses its significance due to its real-time nature. Unfortunately, almost all dynamic bandwidth allocation (DBA) algorithms follow this request-grant cycle and hence lacking in their performance. This paper introduces a novel approach for bandwidth allocation, called Demand Forecasting DBA (DF-DBA), which predicts ONU’s future demands by statistical modelling of the demand patterns and tends to fulfil the predicted demands just in time, which results in reduced delay. Simulation results indicate that the proposed technique out-performs previous DBAs, such as GigaPON access network (GIANT) and round robin (RR) employing the request-grant cycle in terms of Throughput and Packet delivery ratio (PDR). Circular buffers are introduced in statistical predictions, which produce the least delay for this novel DF-DBA. This paper, hence, opens up a new horizon of research in which researchers may come up with better statistical models to brew better and better results for Passive optical networks.
Highlights
Increased use of high data rate services in daily life, such as high-definition TV (HDTV), video on demand, teleconferencing, collaborative gaming, and several other sophisticated multimedia applications, has put an overwhelming demand for bandwidth and data speed on the access network [1,2,3]
With the incorporation of circular buffers, we present the potential of this novel DF-dynamic bandwidth allocation (DBA) approach that can achieve better results in terms of throughput, Packet delivery ratio (PDR) and End-to-End Delay
We evaluate the performance of novel DBA protocol in terms of throughput, PDR and end-to-end delay in comparison with the other two well established DBA protocol standards, i.e., GigaPON access network (GIANT) and
Summary
Increased use of high data rate services in daily life, such as high-definition TV (HDTV), video on demand, teleconferencing, collaborative gaming, and several other sophisticated multimedia applications, has put an overwhelming demand for bandwidth and data speed on the access network [1,2,3]. Passive optical networks (PONs) [4] are used as fiber to the home (FTTH). Itofcan to 256 connections with a collective downstream of 10Gbps and upstream bandwidth of 2.5 Gbps [5] whereas in 10-Gigabit-capable symmetric passive optical network (XGS-PON). Gbps [5] whereas in 10-Gigabit-capable optical network (XGS-PON) provides same downstream bandwidth and upstream bandwidth of 10. Two main provides active transmission devicesbandwidth those areand optical line symmetric passive opticalthere network same downstream upstream. In XG-PON, there are two main active transmission devices those are optical termination (OLT) and optical network unit (ONU) [7,8] connected through optical fiber cable, connectors, splitter in optical distribution network (ODN). Alloc_ID ONU to send the data in thepermission US frame) and Grant_Size different from OLT,.
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