A Survey of Dynamic Bandwidth Assignment Schemes for TDM-Based Passive Optical Network

Butt, Rizwan Aslam; Ashraf, Muhammad Waqar; Faheem, Muhammad; Idrus, Sevia Mahdaliza

doi:10.1515/joc-2017-0186

Cited by 20 publications

(9 citation statements)

References 37 publications

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“…Many studies have been done to design the dynamic wavelength and bandwidth allocation (DWBA) based on next-generation EPON or generalized TWDM-based systems [8,9,10,11]. We discuss those in Section 2.4.…”

Section: Motivationmentioning

confidence: 99%

“…One extension of the GIANT algorithm is the Efficient Bandwidth Utilization (EBU-DBA) for XG-PON system that presents remarkable improvement in the delay [9]. Allocation with Colorless Grant (IACG) DBA scheme shows higher delay and frame loss than EBU and lower delay than GIANT [28], [29]. One DBA scheme, GPON Redundancy Eraser Algorithm for Long-Reach (GREAL), does not utilize the excess bandwidth to support added traffic [30] and has higher delay that EBU and IACG algorithms [28].…”

Section: Dynamic Bandwidth Allocation (Dba) In Ponsmentioning

confidence: 99%

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Supporting Diverse Customers and Prioritized Traffic in Next-Generation Passive Optical Networks

Hoque

Ramamurthy

2020

Optical Network Design and Modeling

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Adviser: Byrav RamamurthyThe already high demand for more bandwidth usage has been growing rapidly.Access network traffic is usually bursty in nature and the present traffic trend is mostly video-dominant. This motivates the need for higher transmission rates in the system. At the same time, the deployment costs and maintenance expenditures have to be reasonable. Therefore, Passive Optical Networks (PON) are considered promising next-generation access technologies. As the existing PON standards are not suitable to support future-PON services and applications, the FSAN (Full Service Access Network) group and the ITU-T (Telecommunication Standardization Sector of the International Telecommunication Union) have worked on developing the NG-PON2 (Next Generation PON 2) standard.Resource allocation is a fundamental task in any PON and it is necessary to have an efficient scheme that reduces delay, maximizes bandwidth usage, and minimizes the resource wastage. A variety of DBA (Dynamic Bandwidth Allocation) and DWBA (Dynamic Wavelength and Bandwidth Allocation) algorithms have been proposed which are based on different PONs (e.g. EPON, GPON, XG-PON, 10G-EPON, etc.). But to our knowledge, no DWBA scheme for NG-PON2 system, with diverse customers and prioritized traffic, has been proposed yet. In this work, this problem is addressed and five different dynamic wavelength and bandwidth allocation (DWBA) schemes are proposed. First, mixed integer linear programming (MILP) models are developed to minimize the total delay of the high priority data. Due to the MILP's high computational complexity, heuristic algorithms are developed based on the MILP model insights. The five heuristics algorithms are: No Block-Split Heuristic (NBH), Equal Block-Split Heuristic (EBH), Priority Based No Block-Split Heuristic (P-NBH), Priority Based Equal Block-Split Heuristic (P-EBH), and Priority Based Decider Block-Split Heuristic (P-DBH). Six priority classes of requests areintroduced with the goal of minimizing the total delay for the high priority data and to lessen the bandwidth wastage of the system. Finally, experiments for the performance evaluation of the five DWBA schemes are conducted. The results show that P-NBH, P-EBH, P-DBH schemes show a 47.63% less delay and 30% of less bandwidth wastage on average for the highest priority data transmission than the schemes without priority support (NBH and EBH). Among these five schemes, NBH method has the highest delay, whereas EBH and P-EBH waste more bandwidth than the other schemes. P-DBH is the most efficient among the five because this scheme offers the lowest delay for high priority data and the minimum bandwidth wastage for lower priority ones. iv ACKNOWLEDGMENTS I would first like to express my gratitude to my supervisor, Dr. Byrav Ramamurthy, for his advice and selfless time. I greatly appreciate the freedom that he has given me to find my own path throughout the thesis.Besides my supervisor, I am also grateful to my thesis committee: Dr. Lisong Xu and Dr. Massimilano Pierobon for their...

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Section: Motivationmentioning

confidence: 99%

Section: Dynamic Bandwidth Allocation (Dba) In Ponsmentioning

confidence: 99%

Supporting Diverse Customers and Prioritized Traffic in Next-Generation Passive Optical Networks

Hoque

Ramamurthy

2020

Optical Network Design and Modeling

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“…New techniques are therefore required to meet these demands and solve the challenges that may arise [1,3,4]. The rapid and expanding demands for multimedia and bandwidth services have shifted research attention to the Passive Optical Network (PON) [5,6]. PON is a network based on a fibre-optic structure which provides a much higher bandwidth in the access network than traditional networks based on copper [7,8].…”

Section: Introductionmentioning

confidence: 99%

Performance Enhancement of SCM/WDM-RoF-XGPON System for Bidirectional Transmission With Square Root Module

et al. 2021

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The 10-Gigabit Passive Optical Network (GPON), also known as (XGPON), is a key technology for the next generation of optical fibre communication systems which can improve reliability and data rate. However, the increment in the transmission distance and data rate will lead to increased dispersion. This paper proposes a model based on the Sub-Carrier Multiplexing/Wavelength Division Multiplexing-Radio over Fibre-10-Gigabit Passive Optical Network system (SCM/WDM-RoF-XGPON) for Radio Frequency (RF) using a conventional Optical Network Unit (ONU) with the Square Root Module (SRM) on the side of the receiver. It is connected to a central office Optical Line Terminal (OLT) via an access network for multi-channel optical fibre transfers with a distance of 80 km and at 10 Gbps data rate. The Optisystem 15 simulation software is used to evaluate the proposed system based on the Bit Error Rate (BER), Quality factor (Q-factor) and eye diagram. The proposed system of bidirectional fibre links uses 1270 nm and 1577 nm wavelengths for uplink and downlink transmissions, respectively. The performance is further enhanced through the use of SRM to compensate for the square law characteristics, making it suitable for providing broadband services. Due to the utilisation of SRM in the architecture, the reported results reveal a double enhancement in successful transition performance at an optical fibre length of 80 km distance. The BER displayed significant improvement (less than 1.00E-09) with SRM at 80 km; however, without SRM and at 50 km, the BER is less than 1.00E-09. Investigations have presented an enhancement in the Q-factor's effectiveness with the use of SRM, which helps to increase the XGPON length. When the length of the fibre is 80 km, the Q-factor is 6 with SRM, while it is 3.7 without SRM.

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“…The existing single-threaded polling algorithm for VPON is not suitable for multi-mode coexistence VPON based on long-reach access networks [14,15]. Compared with single thread, the multi-thread scheme is more suitable for VPON based on LR-PON [16]. By building multiple transmission channels between OLT and ONU, the bandwidth allocation algorithm based on multithreaded polling mechanism can take advantage of idle time slots caused by high RTT [3].…”

Section: Introductionmentioning

confidence: 99%

Flexible Multi-Thread Dynamic Bandwidth Allocation Algorithm in VPONs Based on LR WDM/TDM PON

Gan

Wang

et al. 2020

IEEE Access

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With the smooth upgrade of the access network, multiple tuning-time devices will coexist in the long-reach access network, and the subsequent problems of high round-trip time (RTT) and optical network unit (ONU) tuning delay need to be solved urgently. In this paper, a multi-thread multiple tuningtime devices coexistence (MT-MTDC) bandwidth allocation algorithm is proposed. This algorithm can solve the problems of high RTT and ONU tuning delay in virtual passive optical network (VPON) based on longreach wavelength division multiplexing / time division multiplexing passive optical network (LR WDM/TDM PON). Firstly, Multi-threaded polling mechanism is introduced into multi-mode coexistence VPON. Next, the number of wavelengths and threads is selected adaptively to ensure high bandwidth utilization. Then, the mechanism of dynamically adjusting the thread window is proposed. The mechanism strengthens the collaboration ability between threads and solves the degradation problem of the multi-thread algorithm. Furthermore, the construction of tuning buffer and the setting of time flag effectively solve the problem of more frequent ONU tuning pressure and ONU transmission conflict caused by multi-threaded polling algorithm. Finally, by comparing with the multi-thread longest-first first-available (MT-LFFA) algorithm and the multi-tuning-time ONU scheduling (MOS) algorithm, the proposed algorithm demonstrates its effectiveness in terms of polling cycle time, average tuning delay, bandwidth utilization and average packet delay. INDEX TERMS multi-thread, round-trip time, flexible thread window, tuning delay, virtual passive optical network

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A Survey of Dynamic Bandwidth Assignment Schemes for TDM-Based Passive Optical Network

Cited by 20 publications

References 37 publications

Supporting Diverse Customers and Prioritized Traffic in Next-Generation Passive Optical Networks

Supporting Diverse Customers and Prioritized Traffic in Next-Generation Passive Optical Networks

Performance Enhancement of SCM/WDM-RoF-XGPON System for Bidirectional Transmission With Square Root Module

Flexible Multi-Thread Dynamic Bandwidth Allocation Algorithm in VPONs Based on LR WDM/TDM PON

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