Multi-channel scheduling algorithm for multi-subsystem-based VPON in metro-access optical network

Xia, Weidong; Gan, Chaoqin; Ma, Shucong; Xu, Luxi; Xie, Weilun

doi:10.1016/j.osn.2016.01.002

Cited by 9 publications

(4 citation statements)

References 17 publications

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“…The multi-wavelength VPON architecture in MAON is shown in Fig. 1 [17,18]. Obviously, the entire network is composed of two topologies: ring topology and star topology.…”

Section: A Vpon Architecturementioning

confidence: 99%

Self-Adaptive Resource-Allocation Scheme Combining Traffic Prediction With User Satisfaction in Multi-Wavelength VPON

Gan

et al. 2022

IEEE Photonics J.

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In this paper, a self-adaptive resource-allocation scheme combining traffic prediction with user satisfaction is firstly established in multi-wavelength VPON. Among VPONs, by proposing a (wavelength utility)-based dynamic wavelength allocation algorithm, the optimal allocation of wavelengths can be achieved. In a VPON: under condition that the total requested bandwidth is larger than the total bandwidth, by introducing a bandwidth constraint factor ε, the maximum amount of bandwidth granted for high-priority service can be limited, and the "starvation" problem of low-priority service can be prevented. By solving the user satisfaction model, not only the optimal allocation of low-priority service can be obtained, but also the comprehensive user satisfaction is maximized. Under condition that the total requested bandwidth is smaller than the total bandwidth, by combining an ANN prediction model with a user satisfaction model, a bandwidth allocation model based on traffic prediction and user satisfaction is created. By this model, not only the resource utilization is improved but also the transmission delay is reduced. At the same time, user satisfaction is maximized. By adjudicating on the set judgment condition, the self-adaptive function of control system for the above two conditions is implemented. By simulation, the effectiveness of the proposed scheme is demonstrated.

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“…The multi-wavelength VPON architecture in MAON is shown in Fig. 1 [17,18]. Obviously, the entire network is composed of two topologies: ring topology and star topology.…”

Section: A Vpon Architecturementioning

confidence: 99%

Self-Adaptive Resource-Allocation Scheme Combining Traffic Prediction With User Satisfaction in Multi-Wavelength VPON

Gan

et al. 2022

IEEE Photonics J.

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“…In the process of allocating bandwidth to ONUs according to (11), when the requested bandwidth of the ONU is less than the pre-allocated bandwidth, the extra pre-allocated bandwidth will enter the bandwidth resource pool to participate in the subsequent ONU bandwidth allocation.…”

Section: Bandwidth Allocationmentioning

confidence: 99%

“…Virtual passive optical network (VPON) is an open network architecture. In the access network, ONUs establish virtual connections with other OLTs to share wavelengths, which will form the socalled VPON [11,12]. In VPON based on LR PON or LR WDM/TDM PON, the ONU in the heavy-load OLT subsystem can be added to the light-load OLT subsystem by switching the operating wavelength of the ONU.…”

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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“…At present, the related research on multisubsystem-based VPON is scarce. In [5] and [6], we proposed a (multi-subsystem)-based virtual passive optical network (MS-VPON) in metro-access optical network (MAON) which can implement the syncretism of multiple systems such as TDM-PON, wavelength division multiplexing passive optical network (WDM-PON), and orthogonal frequency division multiplexing passive optical network (OFDM-PON). In [7], an optical network unit (ONU) transfer mechanism is put forward to share remaining bandwidth between subsystems.…”

Section: Introductionmentioning

confidence: 99%

Fair Resource Allocation Based on User Satisfaction in Multi-OLT Virtual Passive Optical Network

et al. 2020

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In this paper, a fair resource allocation mechanism based on user satisfaction in multiple optical line terminal (multi-OLT) virtual passive optical network (VPON) is proposed. By introducing user satisfaction functions, the satisfaction of users can be quantified. By presenting multi-OLT VPON in metroaccess optical network (MAON), different priority services can be effectively handled separately. Based on user satisfaction, a fair resource allocation mechanism called double fair dynamic bandwidth allocation scheme (DFDBAS) is proposed. DFDBAS is a combination of two algorithms: wavelength fair allocation (WFA) algorithm and timeslot fair allocation (TFA) algorithm. In TFA algorithm, max-min fairness (MMF) algorithm is presented to allocate bandwidth for high priority service and Lagrange multiplier method is implemented to allocate bandwidth for low priority service. By implementing DFDBAS, not only user delay satisfaction can be improved, but also user bandwidth satisfaction can increase. By the simulation and analysis, the effectiveness of the proposed algorithms is demonstrated. Compared with modified limited service (LS) algorithm, DFDBAS makes both delay satisfaction and bandwidth satisfaction increase by at least 30% when the load is greater than 1. INDEX TERMS user satisfaction, multi-OLT PON, max-min fairness, dynamic bandwidth allocation, virtual passive optical network

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Multi-channel scheduling algorithm for multi-subsystem-based VPON in metro-access optical network

Cited by 9 publications

References 17 publications

Self-Adaptive Resource-Allocation Scheme Combining Traffic Prediction With User Satisfaction in Multi-Wavelength VPON

Self-Adaptive Resource-Allocation Scheme Combining Traffic Prediction With User Satisfaction in Multi-Wavelength VPON

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

Fair Resource Allocation Based on User Satisfaction in Multi-OLT Virtual Passive Optical Network

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