A New Lossless Fault-Tolerance Mechanism in Hybrid Wireless-Optical Broadband Access Network

Zhang, Hong; Wang, Ruyan; Wang, Honggang; Wu, Guangkai

doi:10.1109/access.2018.2805458

Cited by 13 publications

(6 citation statements)

References 27 publications

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“…However, such solutions have not been verified for application in protecting the feeder segment of a WDM network with a large number of users. Another limit is that although some survivable routing-based algorithms [24]- [25] have been proposed, more than 5 milliseconds of multiple-hop delay still exists, and this can severely deteriorate the delay performance when the network operates in a high-load status [47].…”

Section: Discussionmentioning

confidence: 99%

“…One of the most promising access solutions for local and metropolitan areas is the wireless-optical broadband access network (WOBAN) architecture, as an optimal combination of an optical backhaul and wireless front-end, which contribute to a good scalable, cost effective, configurable and flexible communication system [31], [32]. Therefore, a great deal of previous research into survivable WOBAN architecture has focused on two aspects: the optimal deployment of survivable WOBANs [21]- [23], e.g., wireless router placement and backup radio configuration, and the design of survivable routing-based algorithms [24]- [25]. Furthermore, from the perspective of reliability, compared to the aforementioned pure optical protection scheme, although the above studies can provide more flexible protection to significantly enhance network reliability with a low deployment cost through a front-end wireless mesh network (WMN) [26], [31], they still suffer from two limitations.…”

Section: Introductionmentioning

confidence: 99%

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Highly Reliable Metro-Access Network Based on a Dual-Fiber Ring Architecture and Optimized Protection Mechanisms

Song¹,

Ji²,

Yin³

et al. 2021

IEEE Access

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Network reliability is very important for the next generation of optical networks. In this paper, a highly reliable protection mechanism, which integrates the approaches of optical protection and microwave protection, is proposed for metro-access optical networks based on the wavelength division multiplexing (WDM) technique. By designing a scheme for the convergence of optical and wireless access and cooperating with designed remote nodes (RNs), not only can access for both wired and wireless service be provided simultaneously in each optical network unit (ONU) but also microwave protection can be realized when a failure occurs in a distribution segment. By developing a novel optical switch module (OSM) to cooperate with the dual-fiber ring structure, flexible switching can be achieved to protect against multiple types of failures in the feeder segment, including single-fiber faults, dual-fiber faults and multifiber faults. Based on the above structure, the influence of Rayleigh backscattering (RB) noise can be mitigated when the network is operating under all operating scenarios except for an inner-fiber fault. To further mitigate the influence of noise, optimization for upstream transmission performance is implemented by configuring a reflective semiconductor optical amplifier (RSOA). Furthermore, the feasibility of the overall scheme is verified through experiments and simulations under different operating conditions. The results show that the proposed mechanisms can achieve acceptable bit error rate performance and quality of service (QoS) metrics while also offering various advantages, including high reliability, large scale, and a relatively low cost.INDEX TERMS Fiber fault, Metro-access optical network, Reliability, Protection, Wavelength division multiplexing (WDM).

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Highly Reliable Metro-Access Network Based on a Dual-Fiber Ring Architecture and Optimized Protection Mechanisms

Song¹,

Ji²,

Yin³

et al. 2021

IEEE Access

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“…The power budget is based on various modulatory wavelength techniques. Zhang et al 18 improve survival of WOBAN against certain optical network devices and cellular defects. Numerical results show that the mechanism suggested by LFTM‐PR‐NC significantly improves that of the previous one.…”

Section: Related Workmentioning

confidence: 99%

Fault‐tolerant wireless‐optical broadband access network with cluster‐controlled architecture

Prabha

Ramprasad²

2021

Int J Communication

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Summary The ever increasing demand in wireless connectivity has led PON networks suffer from limitations in mobility and wide area coverage. Wireless networks suffer by bandwidth limitations. Hybridization uses the best characteristics of all networks: wireless networks and optical networks. A lightweight wireless mesh network is a wireless‐optical broadband access network (WOBAN), which has a front end and background effective bandwidth optical network. WOBAN has already suffered from two large network feature faults as well as feeder and fiber breaks. Cluster‐based protection (CBP) mechanism is proposed in order to increase traffic recovery reliability and reduce backup fiber deployment. With minimal fiber distribution cost, CBP efficiently manages single and simultaneous failures from many segments. Long‐term evolution (LTE) technique‐based CBP is implemented in WOBAN. Faults are analyzed by injecting wireless/distribution fiber/multiple feeder fiber. The novel fault tolerant network is built using an efficient automated failure detection and rerouting (AFDRR) algorithm. An efficient automated failure detection and rerouting (AFDRR) algorithm is used for developing the novel fault‐tolerant network. Implementation of orthogonal frequency division multiplexing (OFDM) technology‐based AFDRR‐CBP on WOBAN‐LTE network with the same scenario is analyzed through simulation. The performance measures are compared among CBP‐WOBAN‐LTE network, AFDRR‐CBP‐WOBAN‐LTE network, and OFDM‐based AFDRR‐CBP‐WOBAN‐LTE networks. From the result obtained, it will be revealed that the suggested methodology throughput ratio will increase up to 24.4% when compared to other methodology.

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“…Due to the resource-constrained features of the devices, they cannot be pre-programmed with multiple rules to provide optimal network services. Therefore, traditional network technologies cannot handle IoT requirements efficiently to provide scalability, seamlessly, and cost-effectively ( Bera, Misra & Vasilakos, 2017 ; Davoli et al, 2018 ; Zhang et al, 2018 ; Tomovic et al, 2016 ). Because of the wide variety of IoT and its organizational complexity, the SDN-based IoT architecture has been proposed for effective management ( Darabseh & Freris, 2017 ; Jararweh et al, 2018 ; Haque et al, 2019 ; Alam et al, 2019 ).…”

Section: Introductionmentioning

confidence: 99%

Increasing fault tolerance of data plane on the internet of things using the software-defined networks

Kiadehi

Rahmani

Molahosseini

2021

PeerJ Computer Science

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Considering the Internet of Things (IoT) impact in today’s world, uninterrupted service is essential, and recovery has received more attention than ever before. Fault-tolerance (FT) is an essential aspect of network resilience. Fault-tolerance mechanisms are required to ensure high availability and high reliability in systems. The advent of software-defined networking (SDN) in the IoT plays a significant role in providing a reliable communication platform. This paper proposes a data plane fault-tolerant architecture using the concepts of software-defined networks for IoT environments. In this work, a mathematical model called Shared Risk Link Group (SRLG) calculates redundant paths as the primary and backup non-overlapping paths between network equipment. In addition to the fault tolerance, service quality was considered in the proposed schemes. Putting the percentage of link bandwidth usage and the rate of link delay in calculating link costs makes it possible to calculate two completely non-overlapping paths with the best condition. We compare our two proposed dynamic schemes with the hybrid disjoint paths (Hybrid_DP) method and our previous work. IoT developments, wireless and wired equipment are now used in many industrial and commercial applications, so the proposed hybrid dynamic method supports both wired and wireless devices; furthermore multiple link failures will be supported in the two proposed dynamic schemes. Simulation results indicate that, while reducing the error recovery time, the two proposed dynamic designs lead to improved service quality parameters such as packet loss and delay compared to the Hybrid_DP method. The results show that in case of a link failure in the network, the proposed hybrid dynamic scheme’s recovery time is approximately 12 ms. Furthermore, in the proposed hybrid dynamic scheme, on average, the recovery time, the packet loss, and the delay improved by 22.39%, 8.2%, 5.66%, compared to the Hybrid_DP method, respectively.

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A New Lossless Fault-Tolerance Mechanism in Hybrid Wireless-Optical Broadband Access Network

Cited by 13 publications

References 27 publications

Highly Reliable Metro-Access Network Based on a Dual-Fiber Ring Architecture and Optimized Protection Mechanisms

Highly Reliable Metro-Access Network Based on a Dual-Fiber Ring Architecture and Optimized Protection Mechanisms

Fault‐tolerant wireless‐optical broadband access network with cluster‐controlled architecture

Increasing fault tolerance of data plane on the internet of things using the software-defined networks

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