RESEARCH ARTICLE Analysis on multiple optical line terminal passive optical network based open access network Love KUMAR (✉) 1 , Amarpal SINGH 2 , Vishal SHARMA 3 1 I K Gujral Punjab Technical University, Kapurthala, Punjab 144603, India 2 Beant College of Engineering and Technology, Gurdaspur, Punjab 143521, India 3 Shaheed Bhagat Singh State Technical Campus, Ferozepur, Punjab 152004, India © Higher Education Press and Springer-Verlag GmbH Germany, part of Springer Nature 2018 Abstract Passive optical networks (PONs) offer suffi- cient bandwidth to transfer huge amount having different packet sizes and data rates being generated by fusion of various networks. Additionally, multiple optical line terminals (OLTs) PONs reduce the computational com- plexity of data processing for nonuniform traffic. However, in order to improve the bandwidth allocation efficiency of a mixture of service providers, dynamic bandwidth algo- rithm (DBA) is needed for uplink communication. In this paper, a PON based open access network (OAN) is analyzed for bi-directional communication at various data rates. Multiple wavelengths are used to modulate the data of various service providers to evade the complicated DBA for uplink data broadcasting. The performance of the network is reported in terms of bandwidth exploitation, uplink effectiveness, overhead-to-data ratio and time cycle duration. The network is analyzed at various data rates to reveal the data accommodation capacity. Keywords passive optical network (PON), open access network (OAN), optical line terminal (OLT), hybrid network 1 Introduction A fusion of networks where various service donors can use the network simultaneously is known as an open access network (OAN). The OAN unfasten the every service supplier locally or remotely and offer various services to the consumers. The service suppliers offer diverse services and the consumers can pick the required service [1,2]. As the numbers of service providers will rise soon, there is an utmost need of a backhaul network with huge bandwidth. Also in hybrid networks a central office grants self- regulating connection to the various networks and service suppliers. Usually, an OAN offers a self-regulating connection between a central office and various service suppliers. Although, an ordinary access network and every service supplier can unite to the access network by a single access terminal [3]. The passive optical network (PON) is the accepted access network technology for OAN, due to higher bandwidth availability [4] at lower cost [5]. In PON-OAN, the OLTs of PON serve as a central office and optical network units (ONUs) act as access terminals of OAN to share all the service suppliers. PONs have high bandwidth which make them capable to support the present and future demands of recently deployed multiple operators in densely populated cities. To a connect number of service suppliers, single-OLT PON is not an efficient method due to heavy traffic burden. Further, such systems reduce the data processing computational complexity for non-uniform data traffic. Therefore, multiple-OLT PON is a good contender to overcome the problems of single-OLT PON-based OAN. In conventional multiple-OLT PON based hybrid networks [6,7], every ONU connected to the single service supplier under-utilizes optical network bandwidth. Therefore, a dynamic bandwidth allocation scheme is required for uplink communication to enhance the bandwidth utilization efficiency. Hence, some mod- ifications are needed in conventional multiple-OLT PON based hybrid network to effectively utilization the on hand bandwidth. In this manuscript, an analysis is done for multiple-OLT multiple-wavelength PON based OAN. A dedicated wavelength is provided to individual service supplier to avoid the requirement of complex dynamic bandwidth algorithm (DBA) in uplink broadcasting of multiple service suppliers, such as HDTV, femto-net- works, WSN and FTTH. In this scheme, each OLT separately handles the incoming data of every service Received November 1, 2017; accepted June 19, 2018 , E-mails: er.lovekumar@gmail.com, love.kumar@davietjal.org Front. Optoelectron. https://doi.org/10.1007/s12200-018-0767-3