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Decentralized systems, such as overlay networks or content delivery networks, form a virtual network on top of a physical network leading to inefficiencies in handling network traffic as physical locations are not considered. Therefore, this work investigates, analyzes, and evaluates two feasible network locality metrics for decentralized systems to overcome such inefficiencies. Furthermore, those...
Multipath forwarding consists of using multiple paths simultaneously to transport data over the network. While most such techniques require endpoint modifications, we investigate how multipath forwarding can be done inside the network, transparently to endpoint hosts. With such a network-centric approach, packet reordering becomes a critical issue as it may cause critical performance degradation....
This paper presents a novel vehicle platoon control algorithm using Vehicle to Vehicle (V2V) and Vehicle to Infrastructure (V2I) wireless communications between platoon members. A platoon forms a chain of vehicles (e.g., trucks) for improved traffic and fuel efficiency. Platooning algorithms aim to maintain small inter-vehicular distance between vehicles under dynamic driving conditions like acceleration...
Topology control is one of the key technologies in ad hoc network. Recently some topology control algorithms focus on reducing the end-to-end delay have been proposed. However, they do not consider the delay which is caused by contending for the shared channel and collision at MAC layer. In this paper, we put forward a new delay model to character the link delay which is composed by the transmission...
In visible light communication (VLC) network, which can provide high data rate information transmission, the multiple users will get access to network according to the carrier sense multiple access with collision avoidance (CSMA/CA) mechanism specified by IEEE 802.15.7 standard. In this paper, we propose to improve the channel access mechanism by increasing the channel utilization efficiency and achieving...
The lightpath provision issue is a major challenge in multi-domain software defined optical networks, due to lack of topology and resources information exchangement among domains. Based on the Hierarchical PCE (H-PCE) architecture, this article proposed a Fast Lighpath Provision Mechanism (FLPM) to provide a more rapid inter-domain path establishment solution and decrease the influence of requirement...
Connectivity of network is the premise of service quality for P2P network. In order to ensure each node has connected to the P2P network, this paper proposes an algorithm for Peer-to-Peer Overlay Network Topology Automatic-Restoration. When a node detects an abnormal connection of its neighbor node, it connects the neighbor node's standby node to ensure the correctness and connectivity of the network...
Due to the increased demand for internet services, the challenges that large data centers must handle are bigger. Therefore, in recent years the development of networks defined by software (SDN) has caught the attention of the scientific community, mainly because of the flexibility it presents in its model of centralized management, which facilitates the development of solutions according to demand...
As the current decade is witnessing a shift from traditional System — On — Chip (SoC) to Network — On — Chip, but the inherent problems such as congestion, latency and delay still remains the major issues of concern. The effect of these issues in a chip may somehow be minimized by carefully designing a topology and a suitable routing algorithm which offers both path diversity and scalability. In this...
NDN (Named Data Networking) as one approach of the Content-Centric Networking (CCN) architecture, proposed by Jacobson, 2006, conceptually, has some advantages compares to the current Internet technology which build based on host-to-host TCP/IP protocol stack. However, technically, we have to examine the NDN approach, beside to prove the concept, also to get as much as able the opportunities of improvement...
Network on a chip(NOC) is a new kind of communication method on a chip, which is evolved from system on a chip(SOC), learning from computer network. It is an important component of the multi-core technology. The network on a chip provides a new way to communicate, and it performs better than the original system on a chip based on bus. As the size of system on a chip expanded, the number of nodes in...
In the past few years, an exciting progress has been made on CSMA (Carrier Sense Multiple Access) algorithms that achieve throughput and utility optimality for wireless networks. However, most of these algorithms are known to exhibit poor delay performance making them impractical for implementation. Recently, several papers have addressed the delay issue of CSMA and yet, most of them are limited,...
This paper proposes and evaluates a performance efficient application mapping algorithm for mesh-based NoCs. The proposed algorithm first prioritizes tasks of the given application graph based on their total in/out communication traffic. Then a task with the most communication traffic is selected and mapped onto the center part of the mesh topology i.e., a core with the most available communication...
To pave the way towards using adapted wide scale telco technologies within dedicated networks environment, there is a dire need to increase the reliability of the end-to-end communication beyond what is currently offered to individual subscribers towards the levels previously available in operations technology. This can be achieved by adding a new dynamic Software Defined Networks (SDN) routing overlay...
Protection of transmission against failures can be appropriately dealt with by alternative paths. However, common schemes (e.g., Bhandari's scheme) are characterized by a remarkable delay while determining the transmission paths. This in turn may have a serious impact on serving dynamic demands (characterized by relatively short duration time). As a remedy to this problem, we introduce an approach...
Fault tolerance is one of the most desirable properties in optical networks. Meanwhile, the Software Defined Optical Network (SDON) is an innovative network paradigm that separates the control plane from the underlying data forwarding plane. Therefore, in this paper, we focus on the restoration mechanism for SDONs, and the out-of-band control is achieved for the communication between the controller...
Named Data Networking (NDN) has been considered as a promising networking architecture for Vehicular Ad-Hoc Networks (VANETs). However, Interest forwarding in NDN suffers severe issues in vehicular environment. Broadcast storm results in much packet loss and huge transmission overhead. Also, link disconnection caused by highly dynamic topology leads to low packet delivery ratio. On the other hand,...
Routing in Delay-/Disruption-Tolerant Networking (DTN) has long been recognized as a challenging research topic. The difficulty lies in the fact that link intermittency and network partitioning, possibly coupled with long delays, prevent the use of Internet solutions based on an up-to-date comprehensive knowledge of network topology, as communicated by routing protocols. In the literature on DTN routing,...
Software defined network empowers the creation of a flexible network architecture by abstracting flow control from individual devices to the network level. In this paper, we address the challenges in applying SDN to develop high- performance vehicular networks. We present SDVN, a new SDN based vehicular network architecture. It organizes the topology of the vehicular networks and utilizes vehicle...
ZigBee is a networking standard for low power, low data-rate, resource constrained networks. It provides network and upper layer services for LR-WPAN, cyber physical systems, industrial sensor networks, smart grids, home automations, etc. The routing layer uses the tree based routing protocol wherein only parent-child relationship are considered for routing, ignoring neighbor nodes. This results in...
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