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Bandwidth allocation is a critical issue in the design of an Ethernet Passive Optical Network (EPON) system since multiple Optical Network Units (ONUs) share a common upstream channel. Traditionally, bandwidth allocation schemes relied on centralized Dynamic Bandwidth Allocation (DBA) and considered that the Optical Line Terminal (OLT) is the only device that can assess dynamic bandwidth allocation based on Time-Division Multiple Access (TDMA) for the shared upstream channel. This paper proposes an Efficient Distributed DBA (EDDBA) that supports differentiated services and ensures Quality of Service (QoS) for both inter and intra ONU allocation. The proposed mechanism introduces an identical DBA algorithm running simultaneously in each ONU. The simulation performance for the proposed DBA was conducted using prolog and shows more flexibility, reliability and more proper handling for data, voice, and video. [ABSTRACT FROM AUTHOR]

Recently, we proposed the EPON-based communication network architectures for large-scale wind power farms (WPFs). The proposed architectures offer robust, reliable, high speed and cost effective solution compared with conventional switched-based architectures. In this paper, we first introduce the proposed WPF communication network. Then, we design a sensor data frame structure to carry the sensing data from different wind turbine (WT) parts such as rotor, transformer, nacelle, etc. The data frame includes the logical node ID (LNID), sensor node ID (SNID), sensor type (ST) and sensor data based on IEC61400-25 standard. Fixed bandwidth allocation (FBA) is considered to enable each WT of transmitting its data efficiently within the allocated time slot. We present an analytical model that describes the upstream traffic between the WTs and the control center. Using queueing theory approach, the WT performance is evaluated in view of the bandwidth utilization, queue delay and queue length. In case of WPF, the proposed architecture eliminates the turbines traffic from transit through other WTs which improves the network reliability. [ABSTRACT FROM PUBLISHER]

Online game's traffic becomes one of the important traffic over the Internet. In last decade, popularity of the Massively Multiplayer Online Game (MMOG) rapidly increased. Most of MMOG are constructed based on client-server architecture. MMOG needs a network with very low-latency point-to-point in upstream direction and low-latency broadcasted from server to client in downstream direction. In the broad-band access networks, passive optical network (PON) is one of the best solutions to meet the higher bandwidth demands with low-latency. Among PON system Ethernet Passive Optical Network (EPON) due to low cost, simplicity, and provide high bandwidth seems one of the best architecture for the MMOG. In this paper, we introduce a new Optical Network Unit (ONU) architecture and new Dynamic Bandwidth Allocation (DBA) for handling online game's traffic. The proposed ONU is able to classify MMOG game and pass it to new queue instead to send the MMOG traffic to the Best Effort (BE) queue. The DBA can delay MMOG queue for some cycle without effect to the delays. Simulation results depict that our propose architecture can improve the overall QoS in terms of mean packet delay and packet loss. [ABSTRACT FROM PUBLISHER]

Internet protocol TV (IPTV) is one of the important multimedia applications for the next-generation network. IPTV can provide triple play services that require high-speed access networks with the functions of multicasting and Quality-of-Services (QoS) guarantee to provide attractive services. In the access networks, Ethernet passive optical network (EPON) is regarded as one of the best solutions to meet the higher bandwidth demands. In this paper, we propose a new multicasting mechanism for IPTV in EPON by assigning a unique logical link identifier (LLID) to each IPTV channel requested by users. In our architecture, three tables in optical line terminal (OLT) and optical network units (ONU) are constructed in the reconciliation sub-layer (RS) of ONUs and OLT to handle the IPTV requests. Traffic classifier and IPTV controller components are introduced in the proposed architecture to handle the live IPTV request. Simulation results have shown that our proposed mechanism can improve the QoS metrics in terms of bandwidth consumption, packet loss, and queue length. [ABSTRACT FROM PUBLISHER]

The development of wind power industry enables the new generation of wind turbines (WTs) with longer blades, taller towers, higher efficiency and lower maintenance cost by the maturity of the related technologies. With the advances in the communication technologies, smart wind power farms (S-WPFs) will be a reality in the near future. In this paper, we propose the machine-to-machine (M2M) communication infrastructure for the S-WPFs. The proposed architecture is designed to communicate directly among wind turbines. Therefore, each turbine can decide its operation in real time to maximize power generation, availability and lifetime. The network performance of proposed architectures is evaluated by analytical and simulation model. [ABSTRACT FROM PUBLISHER]

Long-reach passive optical networks are one of the proposed solutions to the merging of access and metro networks into a single system for lowering deployment costs. As propagation delays increase proportional to the network range, new designs of scheduling and bandwidth distribution schemes need to be considered to mitigate its effects on overall packet delay. This paper presents an interleaved polling scheme for Ethernet Passive Optical Networks based on the well-known IPACT algorithm with Limited Service granting. The proposed algorithm takes advantage of the idle time gaps caused by heterogeneous propagation delays and bursty traffic, and utilizes an enhanced Limited Service granting scheme based on the packet delay approximation of ONUs. Simulation results show that the proposed scheduling and bandwidth distribution schemes achieve lower packet delays in providing multimedia services in long-reach EPON systems when compared to IPACT. [ABSTRACT FROM PUBLISHER]

Large-scale grid-connected PV power station and customer-premise grid-connected PV power station are currently the main types of PV power station in China. Because of various scale of construction, operation environments, installation locations and applications, the SCADA (supervisory control and data acquisition) system of PV power station is flexible and complex. This paper studies and proposes an integrated communication platform solution which integrates optical fiber communication, power line carrier communication and wireless communication. The solution has characteristics of uniform network management, flexible configuration and strong adaptability, which can fulfill the requirements of the SCADA system of multiform PV power station. [ABSTRACT FROM PUBLISHER]

Energy use for communications and computing equipment has become a major concern. A growing trend is the almost universal access to multiple communications channels such as Wi-Fi and Ethernet. We develop and evaluate a means of automatically selecting a low-speed (and low-power) channel that delivers sufficient level of performance and selecting a high-speed channel only when it is absolutely needed. Specifically, we explore a Dual-Channel, Single-Link (DCSL) concept at the application layer whereby file downloads automatically select a Wi-Fi or Ethernet channel as appropriate for given performance and energy use constraints. We develop a software application that autonomously selects the best channel for a given file download. A performance evaluation shows the application-layer DCSL is feasible and a controlled trade-off of response time performance and energy use is possible. We project that our system can reduce local communications energy costs in many key cases. [ABSTRACT FROM PUBLISHER]

With the emergence of Ethernet as a convergence layer in access network, Ethernet Passive Optical Network (EPON) has evolved. It is being considered as a promising solution to the “last mile” problem in next-generation broadband access network. An EPON is a point-to-multipoint tree topology, which carries 802.3 Ethernet frames between an optical line terminal (OLT) and multiple optical network units (ONUs) via a passive optical splitter. The multi-point control protocol (MPCP) for medium access control (MAC) in an EPON. In this paper, we investigate design issues for access networks based on passive optical network technology, and we present a preemptive transmission mechanism that works on MAC and PHY layer of OLT and ONU components. We conduct detailed simulation experiments to study the performance and validate the effectiveness. The proposed novel scheme effectively reduces the frame queuing delay as well as jitter, so as to enhance system throughput. [ABSTRACT FROM PUBLISHER]

The first 72 hours of any disaster relief are critical for saving lives, and are thus referred to as the “golden 72 hours”. In order to extend the optical network unit (ONU) lifetime beyond 72 hours in Ethernet passive optical network (EPON) for emergency communications, this paper proposes proper MAC control, traffic scheduling, and admission control schemes to achieve extremely low energy consumptions of ONUs. Simulation results show that the proposed schemes can efficiently reduce the energy consumptions of ONUs by over 90%. Therefore, the lifetime of an ONU whose battery originally has 8-hour backup time is potentially able to be extended beyond 72 hours. [ABSTRACT FROM PUBLISHER]

Hybrid Fiber-Wireless access networks aim at combining optical subnetwork and wireless subnetwork with the objective to reduce their complexity and cost. In wireless subnetwork multipath routing is applied in order to improve throughput. Because of different delays along multiple paths, packets may arrive out of order, which may cause TCP Performance degradation. As all traffic in a FiWi network is sent to the OLT, the OLT serves as a convergence node which naturally makes it possible to re-sequence packets at the OLT before they are sent to the internet. To overcome this problem, Scheduling Algorithms (FIFO, DRR, and Modified Deficit Round Robin) at Optical Line Terminal (OLT) is used effectively to reduce Packet Reordering and to improve TCP Performance. Simulation results show that the MDRR scheduling algorithm provides scalable solution to mitigate the side-effect of packet reordering caused by multi-path routing. [ABSTRACT FROM PUBLISHER]

To solve cascade arising problem of traditional networks under coal mine, this paper has proposed an EPON based Communication Service Framework (E-CSF) under Coal Mine. First, the structure, principles and characteristics of EPON network are analyzed, which focuses on the application of EPON network for the construction of safety information network under coal mine. EPON optical network can completely avoid the passive nature of the external device electromagnetic interference, reduce the circuit and the external device failure rate, improve system reliability. Secondly, EPON can make the ground LAN and monitor network under coal mine connected seamlessly, which will greatly enhance the efficiency, convenience for management and reduces the cost of monitoring communication system. So it is a good solution to communication distance, speed, cost and security problem under coal mine. [ABSTRACT FROM PUBLISHER]

Ethernet Passive Optical Network (EPON) is used in access network. , Optical Line Terminal (OLT) is connected with multiple Optical Network Unit (ONU) by the network connected by Optical Distribution Network (ODN) which consists of passive cable, optical splitters and optical combiners. [ABSTRACT FROM PUBLISHER]

The purpose of this paper is to design and develop an implementation for the underlying data reception on Field Programmable Gate Arrays (FPGA) by top-down structured design. In this paper, we optimize the receiving data function of underlying Ethernet access device, reducing the requirement of the Inter-Packet Gap (IPG) for flow control. It is shown by the test that Ethernet access device don't need IPG for flow control any longer after our optimization. [ABSTRACT FROM PUBLISHER]

Ethernet Passive Optical Network (EPON) is a significant solution in the access layer of network that can provide large amount of bandwidth for different kind of traffic. Idle time in EPON is one of the challenges that could decrease the utilization of EPON channel. To decrease or remove the idle time in EPON network several dynamic bandwidth allocation algorithms have been proposed. Some of the proposed algorithms cannot remove the idle time efficiently in some cases. In this paper a dynamic bandwidth allocation algorithm in EPON has been proposed that efficiently removes the idle time. The proposed algorithm has not any additional cost and increases the channel utilization. The simulation results show the validity and effectiveness of the proposed algorithm. [ABSTRACT FROM PUBLISHER]

Recently, Ethernet Passive Optical Network (EPON) with sleep mode has been actively investigated to improve energy conservation in the broadband access network. EPON with cyclic sleep mode transmits up/downstream traffic at the same time and put into the sleep mode at idle time in Optical Network Unit (ONU). However, QoS requirement can be violated by the cyclic sleep mode. In this paper, we propose novel bandwidth allocation algorithm to maximize energy efficiency while satisfying QoS requirement. The main idea is to consider up/downstream traffic in order to determine suitable scheduling transmission period on Optical Line Terminal (OLT). To do this, it allocates bandwidth according to request from ONU, usually. However, when downstream traffic in OLT buffer exceeds predefined threshold, the proposed algorithm compares threshold to bandwidth request from ONU for reducing OLT traffic queuing delay. So, our proposed algorithm can satisfy both energy saving and QoS requirement. In order to evaluate the proposed algorithm, we perform simulation in terms of total and average sleep time of ONU, queuing delay of downstream traffic in OLT buffer. [ABSTRACT FROM PUBLISHER]

Access networks form a large portion of today's telecom networks. In parallel to their scale, they have high energy consumption. To reduce the energy consumption of access networks, energy saving architectures and protocols have been proposed. Recently, new technologies have emerged for optical access networks such as Long-Reach Passive Optical Networks (LR-PONs) and Fiber-Wireless (FiWi) networks where their convergence offers extended reach and coverage. In this paper, we evaluate packet delay performance and energy-savings in metro-access convergence where Long-Reach EPON (LR-EPON) and Long Term Evolution-Advanced (LTE-A) technologies are employed. Through simulations, we show that energy-efficient protocol solutions for the conventional fiber-wireless access networks can still guarantee significant energy savings for a metro-access convergent infrastructure. However, in the extended reach, a trade-off between energy efficiency and delay is observed. [ABSTRACT FROM PUBLISHER]

Ethernet passive optical access network (EPON) combined with IP transportation and PON transparent broadband transmission is considered a major means for broadband access and FTTH in the future. It has advantages of low-cost, compatibility, simplicity, flexibility, and so on. How to maximize the utilization of limited bandwidth of upstream bandwidth among optical network units (ONUs) is one of the key issues in EPON system. This paper proposes a new concentrated bandwidth allocation algorithm of lightly-loaded-ONU-first and heavily-loaded-ONU-twice-assigned. By adjusting ONUs' scheduling, this algorithm improves the implementation of EPON. Simulation results show that this algorithm outperforms the existing algorithms in overhead bandwidth loss, average packet delay, and average queue length. [ABSTRACT FROM PUBLISHER]

Long reach and high bandwidth Ethernet based Passive Optical Network (EPON) is considered as a kind of promising broadband access network In order to accommodate the ever growing demand of traffic bandwidth and to reach extension scalability of access networks, DWDM technologies have been integrated into EPONs, and till now, several WDM EPON architectures have been proposed as the next-generation access networks. In this paper, to the best of our knowledge, we present an up-to-date survey of WDM EPON based NGA network architectures, as well as the MAC protocols and the corresponding upstream resource assignments schemes such as dynamic wavelength bandwidth assignment (DWBA) algorithms. Finally, we point out important topics for future research. [ABSTRACT FROM PUBLISHER]

Switching the operating state on machines is probably the simpler way to reduce the energy consumption of otherwise non energy-aware devices. Indeed, many energy-aware systems allow two states of operation: a low power idle (LPI) mode, in which the system is unable to process data, and a fully working mode. For networking equipment, packet coalescing is the best known algorithm for managing the LPI mode and has been proved able to get power savings nearing theoretical limits at the expense of packet delay when properly tuned. However, in real networks with non stationary traffic conditions, static tuning induces higher than necessary delays. In this paper we present the first dynamic algorithm that adapts packet coalescing configuration parameters to the real time traffic characteristics. Simulation results show that our algorithm is capable of achieving a given target energy efficiency while keeping packet delay as low as possible. [ABSTRACT FROM PUBLISHER]

Fiber-Wireless (FiWi) access networks aim at combining the flexibility, ubiquity and mobility of wireless access networks with the robustness and high capacity support of the optical access networks. Several bandwidth allocation algorithms have been proposed for the convergence of fiber and wireless access networks. Besides, fiber-wireless convergence, metro-access convergence and energy-efficiency have appeared as further challenges of the ICTs. In this paper, we report our current research results on the service quality of existing energy-efficient bandwidth allocation schemes in long-reach FiWi networks, in terms of detailed delay performance, fairness and utilization. We show that deployment of energy-efficient Dynamic Bandwidth Allocation (DBA) in a FiWi network does not only guarantee energy savings throughout the day but also introduces reduced maximum packet delay for both FTTX and wireless users, enhanced delay variance for all packets and significant fairness among different parts of the network. Furthermore, energy-efficient DBA decreases average buffer occupancy at the ONUs. [ABSTRACT FROM PUBLISHER]

In the future, communications networks are expected to become less an end itself than a means to an end by exploiting them not only for telecommunications per se but also across other relevant economic sectors in order to reap larger benefits from interdisciplinary research across traditional borders, e.g., an increased overall reduction of greenhouse gas emissions across multiple sectors such as energy and transportation, as envisioned by the future Smart Grid. The two main quality attributes of a Smart Grid communications infrastructure are reliability and latency, as defined in IEEE P2030. This paper proposes to aggregate triple-play and Smart Grid services into a converged fiber-wireless (FiWi) broadband access network based on low cost Ethernet passive optical network (EPON) and wireless mesh networks. We first show that, as the load of the FiWi network increases, performance degradation in terms of packet drop and latency of Smart Grid applications occurs due to the lack of quality-of-service (QoS) protection. To mitigate this problem, we propose an adaptive admission control algorithm to provide QoS support for FiWi Smart Grid communications networks. Simulation results show that the proposed admission control enables QoS guarantees for triple-play applications as well as future Smart Grid applications over the same FiWi infrastructure. [ABSTRACT FROM PUBLISHER]

EPON (Ethernet Passive Optical Network) technology is a new kind of fiber optical broadband access network technology. The EPON system mainly includes OLT, ONU and ODN. It inherited the low cost of Ethernet and the high bandwidth of light network, so it has Broad prospects of application in the Residential electricity information collection field. Based on above, this paper combines the characteristics of EPON technology and the requirement of information collection system in the Residential electricity, developed the design and application methods of Optical Fiber collection terminal equipment for the power consumption data acquisition system based on EPON technology, which is an important application part of EPON system. This paper mainly studies the hardware and software design of Optical Fiber collector, and its application in the L.X.Y Community in Beijing. [ABSTRACT FROM PUBLISHER]

This paper proposes and devises a novel, simple, and cost effective PON-based 4G mobile backhaul RAN architecture that enables redistributing some of the intelligence currently centralized in the Mobile Packet Core (MPC) platform out into the access nodes of the RAN. Specifically, this work proposes and devises a fully distributed ring-based EPON architecture that enables the support of a converged PON-4G mobile WiMAX/LTE access networking transport infrastructure to seamlessly backhaul both mobile and wireline multimedia traffic and services. [ABSTRACT FROM PUBLISHER]

The integration of WiMAX networks with EPON networks capitalizes on the large availability of bandwidth in optical access networks with the mobility provided by wireless technologies. In this integration, a WiMAX scheduler needs to take into account the variability of the channel capacity provided by the EPON scheduler. This paper evaluates the performance of the Deficit Based QoS Uplink Scheduler (DBQUS) mechanism, a standard-compliant WiMAX uplink scheduler designed to operate in ONU-BS, under different EPON service cycle durations. The evaluation is conducted using integrated simulators for the WiMAX and for the EPON components. Results show that the proposed scheduler is able to provide QoS to the subscriber stations under different EPON service cycles. As the traffic load increases, the bandwidth received by the BE service flow is reduced due to the service provided to classes of service with higher priority. [ABSTRACT FROM PUBLISHER]

With the growth of mobile handsets and services provided over wireless networks, the need of dynamically managed environments is obvious. Network providers have already moved from E1/T1 lines to more scalable technologies, including EPONs (Ethernet Passive Optical Networks) and WiMax. These new technologies support service differentiation and Quality of Service (QoS). This work presents an overlay, cross-technology, signaling protocol which allows information exchange, enabling convergence in terms of common resource management, between different types of networks. This behavior is desirable mainly in the fixed-mobile convergence (FMC) area. The benefits of such a common, distributed, resource management scheme are presented in this work. A set of simulations performed using OMNet++, show the advantages of its use in converged EPON-WiMax networks. [ABSTRACT FROM PUBLISHER]

The continuing deployment of fiber in the local loop, presents an obvious opportunity to also provide backhauling to mobile base stations in the vicinity of Passive Optical Networks (PONs). To exploit this synergy, one must fully exploit the existing PON MAC tools and also ascertain that certain extreme performance requirements arising from the mobile traffic support can be met by the shared PON medium. This dual objective is addressed in this paper with performance simulations evaluating the most demanding scenario in terms of latency: i.e. that of the hard-handover exchange of messages via one PON over the core network. Also MAC fine-tuning techniques that can improve latency as well as system utilization in the presence of mobile traffic are presented and assessed. [ABSTRACT FROM PUBLISHER]

The integrated architecture of complementary Ethernet Passive Optical Network (EPON) and Worldwide Interoperability for Microwave Access (WiMAX) technologies combine the benefits of optical fiber capacity and wireless network mobility, which will become one of the promising broadband access technologies for next-generation network. In this paper, we propose a novel hybrid dynamic bandwidth allocation (DBA) and scheduling scheme for the integrated EPON and WiMAX in the access network to support quality of service (QoS) and class of service (CoS). The simulation results demonstrate that the proposed scheduling scheme enhanced performance in terms of drop probability, average queue length and average end-to-end packet delay, respectively. [ABSTRACT FROM PUBLISHER]

In order to work out an exact value of the EPON(Ethernet Passive Optical Network) reliability in the smart distribution grid communication system, this paper proposed a method from both the micro and macro perspectives to calculate the failure rate and the reliability in smart distribution grid. On the micro, the reliability of optical devices in OLT(Optical Line Terminal) and ONU(Optical Network Unit)has been evaluated in different temperature conditions which is based on GR-468-CORE standard. On the macro, the effect of different architectural protections of communication has also been estimated. Trunk and branch protection in the EPON architecture can effectively improve the total reliability of communication. [ABSTRACT FROM PUBLISHER]

Multimedia applications over Internet, such as IPTV and video on demand (VoD), have become fast growing applications in recent years. Such applications have stringent QoS constraints in terms of bandwidth, delay and packet loss. As a consequence, broadband access networks play an important role for multimedia applications. There are two emerging technologies offering both high bandwidth and QoS support, that is, Ethernet Passive Optical Network (EPON) and Worldwide Interoperability for Microwave Access (WiMAX). By integrating these two technologies, EPON-WiMAX integrated network can: (1) provide broadband access, (2) support mobile users, and (3) decrease network planning cost and operating cost. Thus, EPON-WiMAX integrated network is an ideal choice for multimedia applications with ubiquitous access. Although EPON-WiMAX integrated network has received growing attentions, however, most of previous works focus on the uplink scheduling and bandwidth allocation. Therefore, in this paper, we investigate the downlink scheduling and bandwidth allocation problem in EPON-WiMAX integrated networks. The objective of the study is to maximize the system throughput and guarantee the quality of service so that the requirements of multimedia applications can be fulfilled. We proposed a two-stage downlink scheduling and resource allocation mechanism collaborating with application layer forward error correction (AL-FEC). We demonstrate the performance of our approach via simulations. Our simulation results indicate that the proposed mechanism can increase the system throughput significantly, especially when AL-FEC is adopted. [ABSTRACT FROM PUBLISHER]

This study is about a prediction approach for our previous dynamic bandwidth allocation algorithm for Ethernet Passive Optical Networks (EPON). Our previous work (hcDBA) is based on half cycle timing for bandwidth allocation. That can be handled as a middle way between online and offline bandwidth allocation schemes. In PONs, prediction is used for bandwidth allocation to grant loaded nodes with early responses. However, due to the versatile nature of data traffic, prediction algorithms have a handicap to provide a better solution in classical approaches. In this study, a novel prediction approach integrated with hcDBA algorithm described. Performance comparison of hcDBA with & without prediction and IPACT algorithm is given. According to the simulation results, prediction on hcDBA seems to give some performance improvements in terms of access-delay. [ABSTRACT FROM PUBLISHER]

We propose a new dynamic bandwidth allocation (DBA) method for long reach passive optical networks (PON) that can shorten upstream latency. In this method, the OLT allocates bandwidth to long-distance (up to 100 km) ONUs preliminarily and shortens the latency of long-distance optical network units (ONUs). This has no influence on the latency of short-distance ONUs if they coexist with long-distance ONUs. We show that this new DBA method achieves a smaller latency with long-distance ONUs than the conventional DBA technique, and that there is no influence on short-distance ONUs. [ABSTRACT FROM PUBLISHER]

In this paper, a code division multiple access (CDMA) enabled dynamic bandwidth allocation (CDBA) algorithm is proposed for the upstream access scheme for Ethernet passive optical networks (EPON). The CDBA algorithm is based on two major components: The first is the parallel transmission capacity offered by CDMA according to the quality of service (QoS) requirement and the second component is the scheduling algorithm which uses the round robin technique. Extensive simulations have been performed in order to compare the proposed CDBA with existing dynamic bandwidth allocation (DBA) algorithms that achieve good bandwidth utilization by use of polling schemes. It is shown that the CDBA can significantly improve the network performance in terms of packet delay, throughput, and queue size management as compared with the well known IPACT algorithm. [ABSTRACT FROM PUBLISHER]

Ethernet passive optical network (EPON) is becoming more popular since the users demand more bandwidth each day. A lot of simulation studies have been done in order to study the upstream EPON transmission, but they are less accurate due to assumed parameters and it does not take into account the physical parameters and the non-linear effects of the optical components. Therefore, this paper presents the study of upstream EPON transmission using hardware. To the best of our knowledge, this is the first time peripheral interface controller (PIC) is being used for an EPON testbed. We also compare the delay result that we achieved from the testbed to the result that we obtained via simulation. The trend of the graph is of the same pattern, with some value differences that are expected due to too many assumptions used in simulation. [ABSTRACT FROM PUBLISHER]

In order to fully optimize the bandwidth in upstream Ethernet passive optical network, dynamic bandwidth allocation (DBA) algorithm is used to allocate the bandwidth efficiently. In this paper, DBA algorithm that can support global priority is used to ensure the quality of service. Fuzzy logic is incorporated for the first time in the global priority DBA to reduce the packet loss as low as 13% and reduce the Expedited Forwarding, Assured Forwarding and Best Effort delay up to 31%, 19% and 13%, respectively if compared to Min's DBA and EDBA algorithms. [ABSTRACT FROM PUBLISHER]

Now the traditional one-way transmission services of audio and video can not meet the needs of people, and so the two-way transformation of HFC network has become inevitable with the growth and development of the two-way transmission services of VOD, IPTV and so on. To begin with, the technology of HFC is introduced, and then the technology of EPON and EOC achieving two-way transformation of HFC network is illustrated in the paper. An example of project of two-way transformation of HFC network is also shown by means of the technology EPON and EOC in the paper. Finally, the summary about the technology of EPON and EOC is discussed. [ABSTRACT FROM PUBLISHER]

Energy management strategy has been considered as an important component in the future Ethernet Passive Optical Networks (EPONs). In this paper, a sleeping mode operation is studied, and a downlink packet scheduling scheme is analyzed to preserve energy consumption and maintain the required QoS. This paper proposes a novel sleep-mode downlink packet scheduling scheme in order to enhance the sleep control function. Simulation results confirm that the proposed approach offers effective power management on the basis of the traffic conditions. The trade-off between network performances and the power saving is examined and compared. [ABSTRACT FROM PUBLISHER]

Ethernet passive optical networks (EPONs) technology has emerged as a promising candidate for next-generation broadband access networks. Aiming at the upstream TDMA mechanism in EPON system, this paper proposes a dynamic bandwidth allocation scheme, called share-based multiple traffic prediction (SMTP), which supports traffic estimation and bandwidth pre-allocation. Theoretical analysis and simulation results verify the feasibility of SMTP by showing that SMTP outperforms other existing schemes with respect to Quality-of-Service (QoS) metrics of data delay and channel utilization. [ABSTRACT FROM AUTHOR]