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The network infrastructures have been rapidly upgraded in many high-performance networks (HPNs). However, such infrastructure investment has not led to corresponding performance improvement in big data transfer, especially at the application layer, largely due to the complexity of optimizing transport control on end hosts. We design and implement ProbData, a PRofiling Optimization Based DAta Transfer...
Using Commercial off-the-shelf (COTS) software over networks that are Disconnected, Intermittent and Limited (DIL) may not offer acceptable performance. Frequent network interruptions for both shorter and longer periods, as well as long delays, low data and high packet error rates characterize DIL networks. In this paper, we designed and implemented a prototype proxy to improve the performance of...
As physical obstacles, vehicles have a significant impact on the efficient propagation of safety-related information in vehicular ad hoc networks (VANETs) by frequently obstructing the LOS link between the source and receivers. Obstructing effect of vehicles will diminish the effective coverage of broadcast as part of vehicles can not decode the broadcast successfully and incur severe impact on road...
Delay-tolerant networks (DTNs) are wireless mobile networks that exhibit frequent intermittent connectivity and large transmission delay among nodes. Research results have shown that quota-controlled routing protocols can strike a reasonable balance between routing performance and cost, where quota is a value to control the number of message copies. However, the question of how to set the optimal...
We propose an alternating direction method of multipliers (ADMM) based solution to a network utility maximization (NUM) problem, and show that it leads to a protocol for congestion control that converges rapidly to utility maximizing transmission rates while guaranteeing zero congestion throughout the network. Our approach hinges on a novel decomposition of the NUM problem that leads to easily solvable...
Software-defined networking (SDN) is used commercially to improve network agility and traffic management capability. As deployed and tactical military systems are often constrained by network performance it is vital to quantify the performance impact of the SDN control plane if SDN is to be exploited in this environment. To assess this we identify the key types of messages used in OpenFlow and how...
Generalized Paxos (GPaxos) is a recent solution to Generalized Consensus, a distributed problem to which several key agreement problems reduce. We envision that GPaxos may unify within a single and novel Agreement-as-a-Service infrastructure to multiple distributed protocols. To date this potential is however not fully unleashed, due to the steep learning curve of the protocol and the high complexity...
IPv6 over the TSCH mode of IEEE 802.15.4e (6TiSCH) is the wireless sensor network protocol standard proposed by the Internet Engineering Task Force (IETF) for Internet of Things (IoT). Aside from 6TiSCH, there are other existing protocol standards for wireless sensor networks which are suitable to be deployed in industrial applications. However, there are no comprehensive performance evaluations done...
Routing stands for the sending the required data to the destination in such a manner that it reaches efficiently with high throughput and accuracy. The data is transferring over the network each sensor use some energy in receiving data, sending data. The life of the network depend how much energy used up in each transmission. The problem occurs when the transmission path meets with some sort of failure...
Energy price has increased rapidly in recent years. As energy being the second greatest cost aside from raw material, factory owners have shown an increasing awareness of overall energy consumption, with a strong desire to have it reduced. The emergence technologies like solar, wind, and energy storage system have brought a significant saving potential for energy cost but also made it more complex...
One of the critical issues in a Wireless Sensor Network (WSN) is the design of a proper routing protocol. While the requirement of low latency and low-energy consumption is getting more and more importance in emerging applications, the WSN should be capable of fulfilling its mission in a timely manner and without loss of energy. In this paper, we focus on multi-hop flat routing. A mathematical model...
Mobile data offloading using Wi-Fi hotspots is increasingly utilized as it satisfies the huge traffic demand and boosts network capacity. For that reason, several studies have been carried out to define the best approaches to offload IP flows from LTE to Wi-Fi. In this paper, we investigate the offload optimization problem from an LTE-A network to Wireless Mesh network (WMN) owned by the operator...
An adaptive decentralized strategy for active queue management of TCP flows over communication networks is presented. The proposed strategy solves locally, at each link, an optimal control problem, minimizing a cost composed of residual capacity and buffer queue size. The solution of the optimal control problem exploits an adaptive optimization algorithm aiming at adaptively minimizing a suitable...
The energy management in Wireless Sensor Networks (WSNs), have been primarily attempted at the M A C layer considering communication pattern and protocols. The work in this paper proposes a node-level application layer based self-organizing energy management algorithm. This distributed algorithm performs the node-level tasks with an objective to conserve and predict node and network lifetime with...
The TCP/IP model is a widely used protocol at present time due to unparalleled popularity of the Internet. Although it is efficient and reliable it does not include the user into its architecture and thus leaves the user without any control over the underlying layers. While the default layering mechanism is set up in such a way that it would give efficient service to most of its clients, it does not...
We daily add more devices and services into existing intelligent home networks. Consequently, various networking standards evolutions being experienced world over have not left home networks behind. These evolutions results in competition and depletion of the available limited resources. Consumers therefore, experience unavailable, unreliable and poor performing network both locally and remotely....
The rapid rising of Linux users requires P2P, an efficient content transport method, to distribute packages. Different from traditional streaming P2P systems, a P2P package distribution system is hazarded by the special characteristics of small package size and hot packages. Due to the small package size, DHT search performance, which is rarely considered in traditional P2P system, comes to be an...
This paper investigates a real-time communication platform for a Smart Grid adaptive Volt-VAR Optimization (VVO) engine. Novel VVO techniques receive inputs from Advanced Metering Infrastructure (AMI) to dynamically optimize distribution networks. As communication platform design and characteristics affect Smart Grid-based VVO performance in terms of control accuracy and response time, VVO ICT studies...
This paper considers a network in which a primary user (PU) may cooperate with a cognitive radio (CR) user for transmission of its data packets. The PU is assumed to be a buffered terminal operating in a time-slotted fashion. We develop an energy-efficient protocol that involves cooperation and coordination between primary and secondary users. To satisfy certain quality-of-service requirements, users...
The Session Initiation Protocol (SIP) is an application-layer control protocol for creating, modifying and terminating multimedia sessions. An open issue is the control of overload that occurs when a SIP server lacks sufficient CPU and memory resources to process all messages. We prove that the problem of overload control in SIP network with a set of n servers and limited resources is in the form...
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