Si Yin

QoS-Aware Scheduling over Hybrid Optical Wireless Networks

Hybrid optical wireless networks present the future-proof solution to the currently deployed copper access infrastructure. Purposing to increase the network throughput under the hybrid framework, we propose a scheduling scheme to deliver diverse services by taking the quality of service (QoS) requirement into consideration. Simulation results demonstrate that our scheme is capable of collecting the QoS requirement information throughout the network, and the centralized process facilitates the reduction of network transmission overhead.

Stability of Predictor-Based Dynamic Bandwidth Allocation over EPONs

We establish a system model to analyze the stability of the predictor-based dynamic bandwidth allocation (PDBA) scheme over Ethernet passive optical networks (EPONs). We prove that an EPON system with PDBA is stable by proper pole placement as the traffic changes dynamically. Our analysis suggests a straightforward framework for designing the DBA algorithm that enables EPONs with stability.

Storage area network extension over passive optical networks (S-PONS)

After 9/11 and the accidental failure of the power grid in North America in 2003, storage area network (SAN) extension has emerged as critical to ensuring business continuity. However, SAN extension encounters challenges in the access network, including scalability problems, cost challenges, bandwidth bottlenecks and low throughput. In this article, we propose a new solution to address these problems: SAN extension over passive optical networks (S-PONs). To tackle the scalability problems and cost challenges, we designed the S-PON architecture based on the existing point-to-multiple-point (P2MP) PON infrastructure. To address the bandwidth bottlenecks in SAN extension, we propose three solutions for carrying storage signals with gigabit-level transmission. We also introduce a new device, XtenOLT, for implementing buffer pools by a new buffer-management scheme to improve SAN extension throughput and utility. Our experimental results show that, in the physical layer, the proposed S-PON transmission technologies successfully deliver SAN traffic to the long-haul at the rate of 2.5 Gb/s; in the network layer, S-PON with XtenOLT dramatically enhances deliverable throughput and utility over long-distance transmission.

Nonlinear Predictor-Based Dynamic Resource Allocation Over Point-to-Multipoint (P2MP) Networks: A Control Theoretical Approach

Most broadband access networks such as passive optical networks (PONs) adopt the point-to-multipoint (P2MP) topology. One critical issue in such networks is the upstream resource management and allocation mechanism. Nonlinear predictor-based dynamic resource allocation (NLPDRA) schemes for improving the P2MP network upstream transmission efficiency have been investigated in an ad hoc manner. In this paper, we establish a general state space model to analyze the controllability and stability of the NLPDRA schemes from the P2MP network systems point of view and propose controller design guidelines to maintain the system stability under different scenarios. Analytical results show that NLPDRA maintains the P2MP network system controllability even when the loaded network traffic changes drastically. We further prove that a P2MP network system with NLPDRA is stable by proper pole placements as the traffic changes. Finally, we provide guidelines to design a optimal compensator to achieve system accuracy.

NXG02-3: Bandwidth Allocation over EPONs: A Controllability Perspective

This paper addresses the issue of bandwidth allocation over Ethernet passive optical networks (EPONs). We develop a state space model to evaluate the controllability of available bandwidth allocation schemes. We show that the predictor-based scheme is completely controllable when the loaded network traffic changes dynamically, while other schemes are either partially controllable or uncontrollable.

Non-Linear Predictor-Based Dynamic Bandwidth Allocation over TDM-PONs: Stability Analysis and Controller Design

Non-linear predictor-based dynamic bandwidth allocation (NLPDBA) schemes for improving the time division multiplexed passive optical networks (TDM-PONs) upstream transmission efficiency have been investigated in an ad hoc manner. In this paper, we establish a general state space model to analyze the stability of the NLPDBA schemes from the TDM-PON systems point of view, and propose controller design guidelines to maintain the system stability under different scenarios. We prove that a TDM-PON system with NLPDBA is stable by proper pole placements as the traffic changes. Our analysis suggests a straightforward framework for designing and applying the NLPDBA scheme for TDM-PONs that ensures stability.

Controllability of Non-Linear Predictor-Based Dynamic Bandwidth Allocation Over EPONs

We analyze the dynamic bandwidth allocation (DBA) scheme over Ethernet passive optical networks (EPONs). Our focus is on the non-linear predictor-based DBA (NLPDBA), which outperforms other existing schemes with higher bandwidth utilization and shorter packet delay. We establish a system model to evaluate the controllability of NLPDBA. Analytical results show that NLPDBA maintains the EPON system controllability even when the loaded network traffic changes drastically. Our analysis suggests a straightforward framework to design the DBA scheme that would enable a completely controllable access network.

State Space Model for TDM-PON Bandwidth Allocation

We propose a state space model to tackle the bandwidth allocation issue of time division multiplexed passive optical networks (TDM-PONs). It describes the TDM-PON system as a threesome of on-line traffic load, bandwidth arbitration decision, as well as queue status. Analytical results show that this model provides a platform to evaluate performance of diverse bandwidth allocation algorithms.

Pseudowire Packet Loss Control in Optical Access

We introduce a packet loss control mechanism to emulate the delivery of native services over packet switched network (PSN) using pseudowire (PW). We propose the virtual circuit connectivity verification (VCCV) insertion (VI) algorithm for adapting variable bit rate (VBR) PW rates to the dynamics of PSN tunnel. Our approach is compatible to existing PW standards, and its applicability has been demonstrated by analysis.

Storage Area Network Extension over Passive Optical Networks Using Parallel Signal Detection

We demonstrate a novel storage passive optical network (PON), which delivers broadband data as well as storage services to the end users through the employment of subcarrier modulation and parallel signal detection (PSD). Experimental results show that the proposed storage PON is capable of providing Gigabit level data and storage transmission in the access network.