In this paper, we describe a method for joint supply, threshold voltage and sizing optimization, in presence of uncertain transistor parameters, to obtain robust energy-delay optimal designs. We extend our previous work on robust transistor sizing, which accounted for the added delay caused by transistor variations by adding margins on each gate delay proportional to the estimated delay variabi...

This paper assumes each user has more than one queue, derives a new packet dependent proportional fairness power allocation pattern based on the sum of weight capacity and the packet’s priority in users’ queues, and proposes 4 new schemes of cross-layer packet dependent OFDM scheduling for heterogeneous classes of traffic based on proportional fairness. Scenario 1, scenario 2 and scenario 3 lea...

This paper models the downlink Fifth Generation (5G) network that supports a flexible frame structure and shorter Round Trip Time (RTT) for Hybrid Automatic Repeat Request (HARQ).  Moreover, design of renowned Division Multiple Access (TDMA) packet scheduling algorithms is revised to allow these support in 5G. Simulation results demonstrate Proportional Fair provides comparable performance dela...

The integer-order delay of proportional–integral multi-resonant-type repetitive control (PIMR-RC) cannot provide excellent performance for grid-tied inverters when the grid frequency fluctuates. To address this issue and reduce errors, a fractional PIMR-RC (FD-PIMR-RC) scheme is proposed. In addition, to computational load memory consumption, Farrow-structure (FFD) filter adopted. digital with ...

We address the issue of reserving resources at packet switches along the path of calls requiring a deterministic bound on end-to-end delay. The switches are assumed to schedule outgoing packets using the Packet-by-Packet Generalized Processor Sharing (PGPS) scheduling discipline. We propose an algorithm for call admission control (CAC) and a number of resource reservation policies that are used...

Optical Burst Switching (OBS) is considered as an efficient switching technique for building the next generation optical Internet. An offset-time based scheme has recently been proposed in order to provide quality-of-service (QoS) in OBS networks. Unfortunately, this service differentiation has several problems. The aim of this paper is to address these problems and introduce the concept of pro...

In this paper, the problem of implications of time delay feedback control of a two-dimensional supersonic lifting surface on the flutter boundary and on its character, that is, benign or catastrophic, is addressed. In this context, the structural and aerodynamic nonlinearities are included in the aeroelastic governing equations. The model and the associated theory are developed for linear and n...

Optical Burst Switching (OBS) is considered as an efficient switching technique for building the next generation optical Internet. An offset-time based scheme has recently been proposed in order to provide qualityof-service (QoS) in OBS networks. Unfortunately, the proposed service differentiation has several problems. The aim of this paper is to address these problems and introduce the concept...

This paper proposes a scheme to provide in a CSMA/CA based multi-hop wireless ad hoc network, a consistent and accurate proportional differentiation in average end-to-end packet delay. The proposed scheme, called PDMED uses a cross-layer approach that requires a distributed scheduler to adapt to the information from a QoS monitor, a route monitor and a channel monitor. Conceptually, the distrib...

Distributed systems achieve scalability by balancing load across many machines, but wide-area distribution can introduce worst-case response latencies proportional to the network’s delay diameter. Crux is a general framework to build locality-preserving distributed systems, by transforming some existing scalable distributed algorithm A into a new algorithm Ā that guarantees for any two clients ...