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—The Quasi-Stationary Approximation (QSA) is often applied to systems and networks where traffic can be classified as short-lived and long-lived. In this paper, we consider an integrated service system that serve short-lived non-real-time and long-lived real-time traffic. For such a system, we introduce a new method, called Generalized Quasi-Stationary(More)
Modeling and performance analysis of optical packet switching (OPS) data center networks (DCN) with flow management is presented. Hybrid optoelectronic packet routers (HOPR) are introduced in the data center network, which combines optical switching fabric and electronic buffers with 100 Gbit/s (25 Gbit/s × 4 wavelengths) links. A novel(More)
—Hierarchical overlay structure is an alternative solution to integrate the existing and future heterogeneous wireless networks for providing subscribers with better mobile broadband services. Traffic loss performance in such integrated heterogeneous networks is necessary for operator's network dimensioning and planning. This paper investigates the(More)
—This paper considers a two-tier femto-macro overlay network architecture, where groups of femtocells are overlaid by macrocells. The capacity of the femtocells is limited, thus redirection of blocked femto calls to the overlaid macrocell is used as a QoS assurance strategy. Similar overflow approaches have been used in telephony; however, extension of this(More)
A torus-topology photonic data center network with smart flow control is presented, where optical packet switching (OPS), optical circuit switching (OCS), and virtual OCS (VOCS) schemes are all enabled on a unified hardware platform via the combination of hybrid optoelectronic routers (HOPR) and a centralized network controller. An upgraded HOPR is being(More)
Modeling and performance analysis of a data center network (DCN) combining optical packet switching (OPS) and agile optical circuit switching (OCS) in a unified platform are presented. Hybrid optoelectronic packet routers which combine optical switching fabric and electronic buffers are used, supporting 100 Gbit/s (25 Gbit/s × 4 wavelengths) optical(More)
This paper considers a novel virtual optical circuit switching (VOCS) scheme for data center networks where short flows are transmitted via optical packet switching (OPS), while long flows with reliability requirement are transmitted via VOCS. VOCS preserves the advantage of optical circuit switching (OCS) for reliable communication, while it overcomes the(More)