The introduction of cellphones with poor receiver sensitivity, known as dirty devices, to the Code Division Multiple Access (CDMA) cellular network results in a reduction in cell edge coverage, degraded capacity, and higher drop-call rates. This poor network performance has a negative impact on customer experience and satisfaction, which may result in increased churn for…
Tags: OMNeT++ Projects
Implementation of NB PHY transceiver of IEEE 802.15.6 WBAN on FPGA
This paper presents the hardware implementation of 2.4 GHz Narrowband Physical Layer for Wireless Body Area Network (WBAN) based on IEEE 802.15.6-2012 standard. Major building blocks of PHY transceiver such as CRC, spreader, interleaver and scrambler were individually designed and integrated. To avoid the inherent limitation of the data transmission and to achieve higher reliability…
Dynamic restoration with GMPLS and SDN control plane in elastic optical networks [Invited]
Optical transport networks typically deploy dynamic restoration mechanisms in order to automatically recover optical connections disrupted by network failures. Elastic optical networks (EONs), currently emerging as the next-generation technology to be adopted in optical transport, introduce new challenges for traditional generic multiprotocol label-switching (GMPLS)-based restoration that may seriously impact the achievable recovery time. At the…
Distributed Secret Dissemination Across a Network
Shamir’s (n; k) threshold secret sharing is an important component of several cryptographic protocols, such as those for secure multiparty-computation and key management. These protocols typically assume the presence of direct communication links from the dealer to all participants, in which case the dealer can directly pass the shares of the secret to each participant.…
A Novel Computational Model for Non-linear Divisible Loads on a Linear Network
This work investigates the problem of a non-linear divisible load distribution on a homogeneous linear network. A novel computational model of non-linear loads that includes complete steps for processing them, is proposed. This model solves the problem of the classical model, whose performance degrades by separating the load. This work also presents an algorithm S…
Full duplex techniques for 5G networks: self-interference cancellation, protocol design, and relay selection
The wireless research community aspires to conceive full duplex operation by supporting concurrent transmission and reception in a single time/frequency channel for the sake of improving the attainable spectral efficiency by a factor of two as compared to the family of conventional half duplex wireless systems. The main challenge encountered in implementing FD wireless devices…
Optimal Approach for Reliability Assessment in Radial Distribution Networks
This paper proposes a new methodology for the evaluation of reliability in radial distribution networks through the identification of new investments in this kind of networks, in order to reduce the repair time and the failure rate, which leads to a reduction of the forced outage rate and, consequently, to an increase of reliability. The…
Sherlock Is Around: Detecting Network Failures with Local Evidence Fusion
Traditional approaches for wireless sensor network diagnosis are mainly sink-based. They actively collect global evidences from sensor nodes to the sink so as to conduct centralized analysis at the powerful back-end. On the one hand, long distance proactive information retrieval incurs huge transmission overhead; On the other hand, due to the coupling effect between diagnosis…
Near field wireless power transfer and quadrature amplitude modulated (QAM) communication link
We present a near field wireless power transfer (NF-WPT) link which is also capable of datacommunication through complex, quadrature amplitude (QAM) load modulation. We present a method for designing a 4QAM constellation that allows for minimal degradation of the NF-WPT link efficiency by minimizing the complex reflection coefficient. Using a modulation board and a resonant 4-coil…
10.2 An FSK plastic waveguide communication link in 40nm CMOS
Technology scaling has enabled RF-CMOS circuits that operate in the millimeter-wave frequency range (30 to 300GHz) where large bandwidths are available. These bandwidths can be exploited to increase data-rates of wireless communication links. Unfortunately, free-space path loss (FSPL) limits the operating distance of wireless systems at these frequencies. A 5-meter link at 120GHz has an FSPL as…