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— We investigate Optical Network Unit (ONU) grant scheduling techniques for multichannel Ethernet Passive Optical Networks (EPONs), such as Wavelength Division Multiplexed (WDM) EPONs. We take a scheduling theoretic approach to solving the grant scheduling problem. We introduce a two-layer structure of the scheduling problem and investigate techniques to be(More)
Metro WDM networks play an important role in the emerging Internet hierarchy; they interconnect the backbone WDM networks and the local access networks. The current circuit-switched SONET/SDH-over-WDM-ring metro networks are expected to become a serious bottleneck — the so-called metro gap — as they are faced with an increasing amount of bursty packet data(More)
We analyze the mean packet delay in an Ethernet passive optical network (EPON) with gated service. For an EPON with a single optical network unit (ONU), we derive ͑i͒ a closed form delay expression for reporting at the end of an upstream transmission, and ͑ii͒ a Markov chain-based approach requiring the numerical solution of a system of equations for(More)
(NG) PONs (í µí±–) provide increased data rates, split ratios, wavelengths counts, and fiber lengths, as well as (í µí±–í µí±–) allow for all-optical integration of access and metro networks. In this paper we provide a comprehensive probabilistic analysis of the capacity (maximum mean packet throughput) and packet delay of subnetworks that can be used to(More)
—Due to the geographic distribution of its subscribers, Ethernet Passive Optical Networks (EPONs) have typically varying propagation delays between the Optical Network Units (ONUs) and the Optical Line Terminal (OLT). In this paper, we consider EPONs with an offline scheduling framework, which enables Quality-of-Service mechanisms by collecting bandwidth(More)
—Packet-switched unidirectional and bidirectional ring wavelength division multiplexing (WDM) networks with destination stripping provide an increased capacity due to spatial wavelength reuse. Besides unicast traffic, future destination stripping ring WDM networks also need to support multicast traffic efficiently. This article examines the largest(More)
The fundamental stability limit and packet delay characteristics of offline scheduling, an elementary scheduling mechanisms in recently proposed dynamic bandwidth allocation mechanisms for Ethernet Passive Optical Networks (EPONs) with wavelength division multiplexing (WDM), are unknown. In this paper, we develop an analytical framework for characterizing(More)
—The two protection methods wrapping and steering used in IEEE 802.17 resilient packet ring (RPR) provide fast but very inefficient and limited network failure recovery. Due to the increased length of the backup path, RPR suffers from high traffic loss, a decreased throughput-delay performance, and the lack of resilience against multiple link and/or node(More)
By using destination stripping and shortest-path routing, the new standard IEEE 802.17 resilient packet ring (RPR) allows for spatial reuse, resulting in a significantly increased capacity compared to source-stripping legacy ring networks. We show that for multicast traffic the performance of RPR reduces to that of legacy ring networks that do not support(More)