Dynamic bandwidth and wavelength allocation with coexisting transceiver technology in WDM/TDM PONs

Abstract Passive Optical Networks (PONs) are continuously evolving. One important requirement of these systems is the possibility to smoothly upgrade the network infrastructure as technologies evolve. During the process of network upgrade, a coexistence of new and old end-users, i.e., Optical Network Units (ONU), with diverse transceiver technologies, is expected. In this work, we focus on a scenario where the network is upgraded from a TDM PON to a hybrid WDM/TDM PON (both short-reach and long-reach), and where the transceivers used in the old TDM PON can coexist with the new transceivers adopted in the hybrid WDM/TDM PON. Therefore, we consider that three different types of transceivers can be installed at the ONUs: single fixed tuned lasers, array of fixed tuned lasers, and tunable lasers. In particular, we propose new Dynamic Bandwidth and Wavelength Allocation (DBWA) algorithms which solve the problem of managing the traffic originated by end-users equipped with transceivers with different characteristics. In this paper we focus on the case of transceivers characterized by different tuning times. To investigate the importance of a DBWA able to manage transceivers with different tuning times, we also compare them to DBWAs which are not aware that different transmission technologies coexist in the network. Then, we test these DBWAs in different network scenarios, and discuss what are the network parameters that mostly affect the algorithms performance. After showing the importance of having a DBWA that supports transceivers characterized by different values of TTs, we investigate also the practical case of tunable lasers that have different values of TT depending on the wavelength they have to retune to (i.e., higher distances between two wavelengths require higher TTs). Finally, we evaluate the performance of the previously proposed DBWAs when the arrays of fixed tuned lasers can transmit over a limited number of wavelengths, i.e., the number of lasers of the array is limited.

[1]  Ahmet B. Keha,et al.  Bandwidth management for WDM EPONs , 2006 .

[2]  J. Prat,et al.  OLT design approach for resilient extended PON with OBS dynamic bandwidth allocation sharing the OLT optical resources , 2008, 2008 10th Anniversary International Conference on Transparent Optical Networks.

[3]  Ahmad R. Dhaini,et al.  Resource Management in STARGATE-Based Ethernet Passive Optical Networks (SG-EPONs) , 2009 .

[4]  Biswanath Mukherjee,et al.  Multi-Thread Polling: A Dynamic Bandwidth Distribution Scheme in Long-Reach PON , 2007, IEEE GLOBECOM 2007 - IEEE Global Telecommunications Conference.

[5]  Biswanath Mukherjee,et al.  Optimizing the Migration to Future-Generation Passive Optical Networks (PON) , 2010, IEEE Systems Journal.

[6]  N. Ansari,et al.  Design of WDM PON With Tunable Lasers: The Upstream Scenario , 2010, Journal of Lightwave Technology.

[7]  Hussein T. Mouftah,et al.  A survey of dynamic bandwidth allocation algorithms for Ethernet Passive Optical Networks , 2009, Opt. Switch. Netw..

[8]  Weisheng Hu,et al.  An upstream multi-wavelength shared PON based on tunable self-seeding Fabry-Pérot laser diode for upstream capacity upgrade and wavelength multiplexing. , 2011, Optics express.

[9]  M. Tornatore,et al.  A Multi-Threaded Dynamic Bandwidth and Wavelength Allocation Scheme With Void Filling for Long Reach WDM/TDM PONs , 2013, Journal of Lightwave Technology.

[10]  M. Maier,et al.  Dynamic Wavelength and Bandwidth Allocation in Hybrid TDM/WDM EPON Networks , 2007, Journal of Lightwave Technology.

[11]  Martin Reisslein,et al.  WDM Ethernet passive optical networks , 2006, IEEE Communications Magazine.

[12]  Martin Maier,et al.  Efficient Scheduling and Grant Sizing Methods for WDM PONs , 2010, Journal of Lightwave Technology.

[13]  Tomoaki Yoshida,et al.  An automatic load-balancing DWBA algorithm considering long-time tuning devices for λ-tunable WDM/TDM-PON , 2013 .

[14]  Yuanqiu Luo,et al.  Time- and Wavelength-Division Multiplexed Passive Optical Network (TWDM-PON) for Next-Generation PON Stage 2 (NG-PON2) , 2013, Journal of Lightwave Technology.

[15]  H. T. Mouftah,et al.  Bandwidth Distribution Solutions for Performance Enhancement in Long-Reach Passive Optical Networks , 2012, IEEE Communications Surveys & Tutorials.

[16]  W. C. Young,et al.  Multiwavelength DFB Laser Array Transmitters for ONTC Reconfigurable Optical Network Testbed (Invited Paper). , 1996 .

[17]  Ioannis Tomkos,et al.  Improving the efficiency of online upstream scheduling and wavelength assignment in hybrid WDM/TDMA EPON networks , 2010, IEEE Journal on Selected Areas in Communications.

[18]  Nirwan Ansari,et al.  Scheduling Hybrid WDM/TDM Passive Optical Networks With Nonzero Laser Tuning Time , 2011, IEEE/ACM Transactions on Networking.

[19]  L.G. Kazovsky,et al.  A highly flexible and efficient passive optical network employing dynamic wavelength allocation , 2005, Journal of Lightwave Technology.

[20]  Wang-Rong Chang,et al.  SPON: A slotted long-reach PON architecture for supporting internetworking capability , 2009, MILCOM 2009 - 2009 IEEE Military Communications Conference.

[21]  Biswanath Mukherjee,et al.  Long-reach optical access networks: A survey of research challenges, demonstrations, and bandwidth assignment mechanisms , 2010, IEEE Communications Surveys & Tutorials.