Optimal dimensioning of the WDM unidirectional ECOFRAME optical packet ring

Abstract

To efficiently support the high rate and the high dynamicity of the traffic in metro networks, an optical packetswitched WDM ring, named ECOFRAME, is proposed. The key features of the proposed ring are optical transparency and statistical multiplexing of optical packets on parallel WDM channels. Such features can be exploited by properly allocating wavelengths and receivers. This paper aims to optimally dimension the unidirectional ECOFRAME rings. The dimensioning at minimum cost (i.e., for wavelengths and receivers) is modeled with an mixed-integer linear programming formulation. An heuristic algorithm is also proposed, and its performance is compared against the optimal solutions and bounds. When considering the receiver and wavelength cost, results indicate that trading the wavelengths for receivers allows cost saving of up to 75% with respect to WDM opti- B. Ušćumlić (B) cal packet rings with a single dedicated wavelength per node (i.e., single receiver at each node).

A cost comparison of survivable subwavelength switching optical metro networks

“…The basic type of protection consist in doubling the used channel capacity and is called "dedicated" protection. 1 Traffic between two nodes is simultaneously sent over two link-disjoint routes. For instance, if K p1 is the rate of a flow between nodes A and B (Fig.…”

“…the TRX cost. The upper bound is taken to be C lw (U B) = 0.1 · C t , which is derived from [1], where the ratio between the wavelength cost per ring and the receiver cost is estimated on a ring circumference of 100 km. Finally, we account for the gate cost when POADM rings are used.…”

“…2) Scenario 3: Impact of TRX cost: Here, we suppose that C t changes in the range [1,20] (cost model range normalized to $ 1000), while the other cost components are fixed to C s = 0.05 and C lw = 0.1. The resulting design cost is shown in Figs.…”

“…Optical transport solutions with subwavelength-granularity switching have been proposed for the metro networks (see [1] for an overview), to improve the dynamics and the bandwidth utilization. In this paper, we focus on two such subwavelengthgranularity switching technologies, Time-Domain Wavelength Interleaved Network (TWIN) [2], adapted to physically meshed networks, and Packet Optical Add/Drop Multiplexer (POADM) [3], which applies to physical rings only.…”

On the impact of transmission technologies in metropolitan networks

“…Although in the last years many studies have focused on the metro architectures [1], to the best of our knowledge, only the work presented in [2] compares the cost of traditional and optical metro networks. However, the maximum traffic considered in this study (40 G) is low taking into account the current traffic growth rate.…”