Chien Aun Chan

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The energy savings of 10 Gbps vertical-cavity surface-emitting lasers (VCSELs) for use in energy-efficient optical network units (ONUs) is critically examined in this work. We experimentally characterize and analytically show that the fast settling time and low power consumption during active and power-saving modes allow the VCSEL-ONU to achieve significant(More)
The energy consumption of the Internet is anticipated to be one of the main contributors to global energy consumption in the coming decades. As a result, renewed attention has been given to the energy efficient design and operation of network services. The video on demand (VoD) service is expected to be one of the most prominent services through the(More)
Energy-efficient video distribution systems have become an important tool to deal with the rapid growth in Internet video traffic and to maintain the environmental sustainability of the Internet. Due to the limitations in terms of energy-efficiency of the conventional server centric method for delivering video services to the end users, storing video(More)
Internet traffic has grown rapidly in recent years and is expected to continue to expand significantly over the next decade. Consequently, the resulting greenhouse gas (GHG) emissions of telecommunications service-supporting infrastructures have become an important issue. In this study, we develop a set of models for assessing the use-phase power(More)
The Ethernet passive optical network (EPON) is one of the most viable optical access technologies for the provision of broadband services to users. However, the scalability of EPON has become a limiting factor in realizing network architecture with large coverage and a high number of subscribers. EPONs with longer reach and higher split ratios have been(More)
The Ethernet passive optical network (EPON) has been considered as one of the most suitable next-generation optical access solutions. As a time-division multiplexing PON (TDM-PON) technology, the transmission media of EPON is shared among multiple users. Therefore, medium access control (MAC) protocol plays an important role in enabling a dynamic bandwidth(More)
We present energy consumption models of video-ondemand (VoD) services delivered through newly proposed localized hybrid peer-to-peer (HP2P) and localized peer-assisted patching (PAP) with multicast video delivery methods over optical access networks. In this paper, we demonstrate through simulations that the localized PAP with multicast video delivery(More)
Global mobile data traffic has increased from 0.2 exabytes per month in 2010 to 2.5 exabytes per month in 2014, with a staggering growth of 1,150 percent over four years. Rapid growth in mobile data traffic is expected to continue into the future. As estimated by [1], global mobile traffic will increase by a factor of 10 between 2014 and 2020. Rapid growth(More)