Minimizing the Arrayed Waveguide Grating Cost and the Optical Cable Cost in Deploying WDM Passive Optical Networks

Zhang, Jingjing; Ansari, Nirwan

doi:10.1364/jocn.1.000352

Cited by 19 publications

(5 citation statements)

References 16 publications

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“…To add the flexibility in the network, we proposed an architecture as discussed in case 2. Case 2: To make the conventional architecture flexible, energy efficient, OPEX efficient and resilient to OLT TRx/line Incoming wavelengths of 1 × N AWG start repeating its output port after the free spectral range (FSR) [30,31]. OLT line cards and tunable ONU is shown in Fig.…”

Section: Proposed Architecturementioning

confidence: 99%

Adaptive bandwidth mechanism using dual rate OLT for energy efficient WDM–TDM passive optical network

Garg

Janyani

2017

Telecommun Syst

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This paper reviews various energy efficient approaches in existence and proposes a Hybrid WDM-TDM PON architecture that allows the adaptive bandwidth allocation mechanism to reduce central office power consumption with acceptable performance. Our proposed architecture allows sending two signals, one broadband and other narrowband to each optical networking unit so an appropriate signal can be utilized according to the traffic demand. In case of very low traffic, only narrowband signal is used and a significant amount of energy consumption and OPEX is reduced. By using 2 × N power splitter and interleaver, proposed architecture provides broadcasting at both broadband and narrowband signal depending on the required link rate. This further reduces energy consumption and OPEX by avoiding the transmission of same signal from multiple sources. Offered data rates to the optical distribution networks (ODNs) may also be varied by doubling the wavelength spacing of remote node AWG so that two contiguous wavelengths can be transmitted at each port or ODN. This provides the geographical dynamic bandwidth allocation. Proposed architecture also support simultaneous transmission of both broadband and narrowband signals to the ODN to provide bandwidth scalability and network extensibility for supporting future access network in terms of new users and data rates. As two signals are reaching to any ODN, resiliency against OLT TRx and line card failure is also achieved. The performance of the proposed design is verified by simulation results in terms of bit error rate and receiver sensitivity to demonstrate its feasibility for the next-generation optical access network.

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Section: Proposed Architecturementioning

confidence: 99%

Adaptive bandwidth mechanism using dual rate OLT for energy efficient WDM–TDM passive optical network

Garg

Janyani

2017

Telecommun Syst

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“…Zhang and Ansari [22] present a heuristic scheme to minimize the cost of AWGs and of the optical cables in deploying a WDM PON. While optimizing the trade-off between the AWG cost and optical fiber cable cost, they decompose the network planning problem into the following subproblems:(i) determine the subscribers connected to each AWG exploiting treepartitioning algorithms, (ii) decide geometric locations of AWGs, (iii) determine the cascaded AWG architecture by proposing a recursive partitioncombination based algorithm.…”

Section: Related Work (Network Planning and Placement Of Equipment In Pons)mentioning

confidence: 99%

An efficient optimization scheme for WDM/TDM PON network planning

Jaumard

Chowdhury

2013

Computer Communications

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With the growing popularity of bandwidth demanding services such as HDTV, VoD, and video conferencing applications, there is an increasing demand on broadband access. To meet this demand, the access networks are evolving from the traditional DSL (xDSL more recently) and cable techniques to a new generation of fiber-based access techniques. While EPONs and GPONs have been the most studied passive optical access networks (PONs), WDM-PON is now clearly seen as the next generation trend with an hybrid set of switching equipment.We propose here an original optimization scheme for the deployment of greenfield PON networks where we minimize the overall deployment cost. Given the geographical location of ONUs and their incoming/outgoing traffic demands, the newly proposed scheme optimizes the placement of splitters/AWGs in a PON and the link dimensioning in order to provision the overall demand.The optimization scheme proceeds in three phases. In the first phase, we generate several potential equipment hierarchies, where each equipment hierarchy is associated with an ONU partition such that a switching equipment is associated with each cluster, each ONU belongs to a single cluster, and the splitting ratio of the equipment corresponds to the number of ONUs in the cluster. In the second phase, for each equipment hierarchy, we make use of a column generation (CG) mathematical model to select the type and location of the switching equipment that leads to the minimum cost multi-stage equipment topology which accommodates all the traffic demand. The third phase selects the best hierarchy among all the generated and dimensioned Preprint submitted to Computer ComunicationsOctober 2, 2012hierarchies.The optimization model encompasses the particular cases where all switching equipment are either splitters and AWGs, and outputs the location of the switching equipment together with the dimensioning of the PON network. We performed numerical experiments on various data sets in order to evaluate the performance of the optimization model, and to analyze the type of equipment hierarchies which are generated depending on the traffic and the location of the ONUs.

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“…Similar to passive optical networks (PONs), fixed WiMAX exhibit the same characteristics of the point-to-multipoint topology (Lu, 2007). In this context, network optimization can be realized through deployment of scheme comparable to cascaded arrayed waveguide gratings (AWGs) due to their cyclic property (Zhang, 2009). Both WiMAX and PON share the same topology given a fixed routing such that the position and placement of communicating nodes can be optimized in much the same way as the cascaded AWG structure in PONs so as to optimize how much bandwidth each communicating node can receive.…”

Section: Communication Networkmentioning

confidence: 99%