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We propose a dynamic control algorithm for flexible grid networks that can seamlessly adapt to transition channel capacity changes. Long-term network performance is numerically evaluated and the effectiveness of the proposed algorithm is verified.
Digital radio over fibre (RoF) technology has been suggested as a promising solution to replace conventional analogue RoF technology for multi-service in-building wireless coverage. However in conventional digital RoF, digitisation leads to high data rates which in turn results in high capital expenditure (CAPEX) and operational expenditure (OPEX). This paper investigates a novel methodology to transmit...
In this work, a spectrally efficient frequency division multiplexing (SEFDM) scheme based on radio over fiber (RoF) technology is proposed for the first time, so as to address next generation wireless data traffic demands on a cost, energy & spectrally efficient way. A proposed radio over fiber topology for beyond 4G deployment is addressed and a proof-of-concept SEFDM long term evolution (LTE)...
The fiber Bragg grating (FBG) accelerometer presented has a modified cantilever beam design, which places a section of the fiber that contains the FBG perpendicular to the cantilever surface, between the tip of the cantilever and the sensor frame. This elongates the FBG axis uniformly in order to get the highest possible strain along the grating, resulting in the enhancement of the Bragg wavelength...
A 20Gb/s Transimpedance Amplifier (TIA) is implemented in 65nm CMOS process using input-serial-peaking technique. Measurement results show that the hybrid integrated TIA with PD achieves up to 20Gb/s clean optical-diagram, with 4.3ps RMS-jitter, consuming 7.2mW.
We realize a stable single source infinite impulse response microwave photonic filter with GHz level free spectral range based on a coherence managed multi-longitudinal-mode erbium doped fiber laser by controlling the filter bandwidth and cavity length.
We review new options for long wavelength multimode fibers for high speed transmission at 25Gbps and present recent results for different transceivers using these new multimode fibers or operating using modal dispersion compensating multimode fibers.
We review recent single-carrier 400G schemes based on high baud rate signals with different spectrum efficiency (SE) based on QPSK and 16QAM. The long-haul performances under different transmission conditions and modulation formats are studied. The digital signal processing for 400G signal recovery is also discussed.
With advanced modulation, 100-Gb/s systems over 100s of kilometers based on directly-modulated single-model VCSELs are achieved using coherent detection, and an 115-Gb/s line-rate short-reach system based on a single VCSEL is demonstrated using direct detection.
In this paper, we experimentally investigate the effect of state-of-the-art digital to analog converter (DAC) circuit, on the performance of high speed optical transmitter. We particularly consider two operating regimes, we refers as over- and under-sampling conditions. It is well known that a sampling rate of 64GSa/s limits the maximum baud rate to 32Gbaud with a sampling rate of 2 sample/symbol...
In this paper, we present a new CMOS analog continuous-time linear equalizer. The proposed structure overcomes some of the limitations due to the low supply voltage of the most widely used continuous-time equalizer, the degenerated differential pair. The prototype has been tested for multi-gigabit short-range applications targeting up to 2 Gb/s through a 50-m SI-POF. The proposed linear equalizer...
Multipath provisioning (MPP) in elastic optical networks (EONs) can improve the network performance effectively. In this paper, we study the protection schemes for MPP to ensure 100% restoration against single-link failures. We design three algorithms, namely, Instant-ILP, PWCE-MPP and mPWCEMPP. The first one leverages a simple integer linear programming (ILP) model to design the optimal working-backup...
Fiber optic communication technology is an essential component in any Electrical Engineering curriculum. Unfortunately the expensive fiber optic communication equipment is a major drawback in teaching fiber optics theories and principles especially in the 3rd world countries. This paper presents a development of a low cost Fiber optic power meter and a bandwidth analyzer to be used in laboratories...
With continued growth in Internet traffic, traditional IP routers struggle to keep pace with bandwidth demand. Router bypass, in which portions of traffic bypass transit routers through lower layer transport capacity, has been studied as one method to address this challenge by improving network efficiency. But while various studies have shown that router bypass may offer significant advantages in...
To meet increasing demands for server computational power, high-density, multilane links with a data rate exceeding 25Gb/s/lane are needed. An optical transceiver with a retiming capability would significantly enhance the usability of the link by extending the reach. Such optical transceivers should operate without an external clock source since a small form factor is imperative. The optical link...
This paper investigates the practical and economic aspects of building a multiple link failure resilient optical network using ITU-T standards based shared mesh protection schemes. Our results show that practical deployments of multiple link failure resilient networks are feasible using standards based shared mesh protection at a cost typically lower than 1+1 protection scheme, while enforcing sub-SOms...
This paper presents a heterogeneous FC-AE-1553 network with an exchange type and a bus type, which can provide a highly reliable, low latency, high bandwidth and flexible solutions. By compare the advantage and disadvantage between FC-AE-1553 exchange type and passive optical network (PON) type, we design a heterogeneous network both use the PON technology and standard FC-AE-1553 protocol technology...
We propose a novel mobile fronthaul transmission scheme to achieve bandwidth-efficient transmission of both the I/Q waveforms of wireless signals and the control words (CWs) between baseband units (BBUs) and remote radio units (RRUs). Unlike the common public radio interface (CPRI) where the I/Q waveforms and the control words are transmitted as a binary sequence in the time domain, the proposed transmission...
With the growth of cloud computing and other high-bitrate disaster recovery center (DRC) support service, DRC networks play an important role in the future networks. But the nature or man-made disaster is the main threaten of survivability. In this paper, we focus on the protection of DRC node based on contentconnectivity against disaster in disaster recovery center networks. An integer linear programming...
We discuss the role of multi-layer plan in PON design and introduce a PON planning tool. Starting from the multi-layer mapping and routing mechanism, the automatic plan algorithm of multi-layers and related failure simulation are analyzed. Automatic planning and failure simulation based on the multi-layer model are experimentally demonstrated.
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