Effect of Channel Spacing on the Design of Mixed Line Rate Optical Wavelength Division Multiplexed Networks
-
Sridhar Iyer
and
Shree Prakash Singh
Abstract
The ever increasing heterogeneity and growing traffic volume has resulted in significant innovations and paradigm shifts within the telecom backbone networks. In order to cost-effectively respond to the diverse variety of traffic requirements having heterogeneous service demands, wavelength division multiplexed (WDM) optical networks have adopted the mixed line rate (MLR) strategy. In MLR networks, many wavelength channels with various line rates can co-exist within the same fiber which, however, raises many important design issues; one of them being the choice of the channel spacing. The quality of signal is affected by the channel spacing in terms of the bit-error rate (BER), which in turn affects the maximum optical reach of the lightpaths that depends on the line rates. In regard to the aforementioned, different methods can be adopted in order to set the width of the channel spacing, viz., (a) choice of a 50 GHz uniform fixed channel spacing specified by the ITU-T grid, (b) exploring various channel spacing values for different line rates so as to optimize the usage of the fiber spectrum, or (c) seek for an optimal value of the channel spacing which results in the minimum network cost. In the current work, we evaluate the MLR network cost for various channel spacings; hence, we find an optimal value of the channel spacing that leads to the minimum MLR network cost. The simulation results reveal that, for a MLR network, even with the assumption of uniform channel spacing, optimal values of the channel spacing for a minimum cost network can be identified.
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© 2019 Walter de Gruyter GmbH, Berlin/Boston
Articles in the same Issue
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- All-Optical Logic Gates and Boolean Expressions in a Photonic Mach–Zehnder Interferometer
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Articles in the same Issue
- 10.1515/joc-2019-frontmatter1
- Devices
- A Comparative Analysis of Dual-Order Bidirectional Pumping Schemes in Optical Fiber Raman Amplification
- All-Optical Logic Gates and Boolean Expressions in a Photonic Mach–Zehnder Interferometer
- Design and Simulation of Optical 4-Channel Demultiplexer Using Photonic Crystals
- Excellent Quality Factor Ultra-Compact Optical Communication Filter on Ring-Shaped Cavity
- Modified Periodic Encoder for Increasing Pulse Height in PON Monitoring System
- Laser
- Investigation on Chirping induced performance degradation in Single Mode Directly modulated 1.55um DFB laser
- Networks
- Chaotic Laser “Broadcast-Star” Synchronization Network and Its Application in Logic Gates
- Comparative Analysis of Various Wavelength Division Multiplexed PON Standards
- Comprehensive Polling and Scheduling Mechanism for Long Reach Gigabit Passive Optical Network
- Cost Efficient 4 × 2.5 Gb/s Transparent WDM Ring Network using DML and MetroCor Fiber for Long Reach Applications
- Effect of Channel Spacing on the Design of Mixed Line Rate Optical Wavelength Division Multiplexed Networks
- Systems
- Performance Evaluation of Sub-carrier Multiplexed SAC-OCDMA System Using Optimal Modulation Index
- Performance Investigation of OTDM Link at 10*4 Gbps and Link Range of 348 km Using NRZ and RZ Schemes
