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With the increasing complexity of networks, Software Defined Networks (SDNs) have been developed to help administrators configure and operate network services with controllers such as Beacon, OpenDaylight and Floodlight. These controllers provide a suitable platform for high bandwidth applications. In this paper, several SDN controllers are evaluated using different network topologies. Some controllers...
Ubiquitous in-network caching is one of the important aspects of the Information-Centric Networking (ICN), which has been a hot topic of ICN research. Many works have tried to propose better caching schemes to solve the drawbacks of the default en-route scheme, but most of them are insufficient to improve performance of entire network for just considering single layer optimization factor. Also considering...
Multi-path allocation has been proposed as a simple way to achieve traffic protection in different networking domains. In this work dual-path allocation is proposed for Elastic Optical Networks (EON) assuming dynamic offered traffic, and its performance is quantified by simulation. Indeed, dual-path allocation is compared with partial dedicated path protection assuming different scenarios. In addition...
In this paper, we propose a modeling approach for a Content-Centric Networking (CCN) network by considering the dynamics of its transport layer protocol. Transport layer protocols for CCN have mainly been investigated through simulation experiments because CCN itself is a complicated network architecture compared with IP, and the complex interaction between CCN caching and the behavior of a transport...
Nowadays, the demand for data transmission is ever increasing with the increase of network applications. Therefore, how to enhance the performance of data transmission is an issue worthy of in-depth discussion. The throughput of single-path transmission schemes might be throttled by a congested link of its path. In contrast, multipath transmission schemes can utilize the bandwidth resource of several...
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...
Most Information Technology (IT) services nowadays rely on one or multiple data centers. In this paper, we propose a Quality of Service (QoS) scheme for Intra/Inter data center communications systems. The proposed scheme is based on differentiation of traffic into different class categories. The differentiation is based on the source of traffic as well as the specific traffic's requirements. We conduct...
This paper proposes a new congestion control method based on a hop-by-hop rate control in named data networking (NDN). The proposed method suppresses the excessive reduction of Interest sending rate due to continuous negative acknowledgement (NACK) packets caused by the propagation delay. The proposed method limits the rate reduction to once per congestion. The point of our method is not to change...
The performance of wireless mesh networks (WMNs) deployed for Internet access in rural settings is affected by several factors. Typically, deployments in African domains use cheap and computationally constrained devices with challenges such as power fluctuations, gateway congestion, VSAT communications asymmetry and low bandwidth, which affects throughput under dynamic scenarios. Caching methods can...
Radio access technology (RAT) selection has recently received much attention from the research community due to the increasing deployment of heterogeneous wireless networks. Most prior works mainly focus on proposing an efficient algorithm that yields good performances, and evaluate their solutions on a certain network model, particularly in cases when every user can connect to all the available base...
Load-balancing and network optimization in SDN networks require efficient flow splitting during the path computation phase. The way flow splitting is typically implemented in switches is to map the output of an hash function computed on the headers of incoming flows to the content stored in a Ternary Content Addressable Memory (TCAM), a very efficient but scarce resource. Although a large TCAM budget...
Understanding the characteristics and requirements of applications that run on commodity clusters is key to properly configuring current machines and, more importantly, procuring future systems effectively. There are only a few studies, however, that are current and characterize realistic workloads. For HPC practitioners and researchers, this limits our ability to design solutions that will have an...
This paper quantifies the difference in resource demand between modern and classic NoC workloads. In the paper, we show that modern workloads are able to better utilize higher numbers of VCs and smaller C factors in order to attain performance and energy efficiency. This is because of the high throughput and possible local congestions in their traffic pattern. As a result, such workloads are more...
To achieve high throughput, core count in compute accelerators such as General-Purpose Graphics Processing Units (GPGPUs) increases continuously. The communication demand of these cores boosts the demand for a low-latency packet switched network. As packet latency is mainly composed of per-hop latency, contention latency and serialization latency, a favorable Network-on-Chip (NoC) design should efficiently...
A simple scheme to implement dedicated path protection in Elastic Optical Networks is proposed and evaluated under dynamic traffic conditions. It consists in splitting the spectrum available in the network links in two bands used respectively for working and backup traffic. These bands are conveniently sized taking into account the network topology and the routing constraints. When the band dedicated...
Linear network coding (LNC) has great advantages in optimizing throughput, balancing network load, increasing robustness, etc. Since the coded data packets transmitted in the network are linear combinations of original data packets, the attacker cannot decode to obtain the original data when it cannot acquire enough coded data packets. Therefore, LNC can also provide efficient information security...
Multipath TCP is an extension to TCP protocol that allows a single connection to be split across multiple paths. MPTCP overcomes few limitations of TCP thereby offering added benefits like increased throughput and network resource utilization and resilience to possible link failures. Different data paths over the network face different end-to-end path delay. The performance of MPTCP is affected not...
The InfiniBand Congestion Control (IB CC) mechanism is able to reduce the negative congestion consequences in many situations. However, its effectiveness depends on a set of configurable parameters that must be adjusted by users to tackle congestion. If the parameters are not appropriately configured, IB CC could negatively impact the network performance and production jobs. Additionally, the IB CC...
The InfiniBand Congestion Control (IB CC) mechanism is able to reduce the negative congestion consequences in many situations. However, its effectiveness depends on a set of configurable parameters that must be adjusted by users to tackle congestion. If the parameters are not appropriately configured, IB CC could negatively impact the network performance and production jobs. Additionally, the IB CC...
With a current utilization of around 25% of its total weight, optimization of cabling and harness plays an important role in the design of an aircraft. This is a multi-objective optimization problem as the physical properties of the harness (e.g., length and weight) as well as the logical properties of the underlying network (survivability and performance) have to be taken into account. We propose...
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