Message dissemination is a key component of Vehicular Ad hoc Networks (VANETs). It enables the capability of Intelligent Transportation Systems to support safety and infotainment services for vehicles and people on travel. Dissemination in VANETs typically relies on the intelligent election of selected vehicles to act as relay nodes, a critical element that serves to […]
Read moreVehicular Ad-Hoc Network (VANET) is an exponential growing technology in today’s modern computing era. Vehicle are peers of peer to peer network. All vehicles are having mobility. In this paper we have presented an evaluation of routing protocols AODV, DSDV and DSR on basis of test performance metrics like generated packets, received packets, dropped packets, […]
Read moreReal-time path planning can efficiently relieve traffic congestion in urban scenarios. However, how to design an efficient path-planning algorithm to achieve a globally optimal vehicle-traffic control still remains a challenging problem, particularly when we take drivers’ individual preferences into consideration. In this paper, we first establish a hybrid intelligent transportation system (ITS), i.e., a hybrid-VANET-enhanced […]
Read moreToday, off-line network planning tools are used to optimize transport networks from scratch. A set of pre-planned wavelength services is taken into account for routing optimization. Performing such optimization in an operational transport network may lead to the rerouting of a large amount of wavelengths per link followed by massive adjustments of optical power levels. […]
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FRACTAL: A framework for recursive abstraction of SDN control-plane for large-scale production networks
Software-defined networking (SDN) renovates traditional networking systems by replacing a distributed, per-switch control plane with a (logically) centralized one. To design a scalable, highly available SDN control plane, it is inevitable to disseminate the network state to multiple instances horizontally by using measures like replication and partitioning. However, some recent studies reported that it is […]
Read moreSoftware-defined deployments are growing into data center and enterprise network infrastructures. The typical promises of software-defined networks (SDN) are improved time for market, decreased risk and operational costs for services, flexibility and unified management. However, little is known and shared about how to actually manage an SDN network, especially in localising underperforming network paths (what […]
Read moreMobile data traffic is expected to increase 11-fold between 2013 and 2018. A more dynamic and flexible network is needed to cope with the growing data volume. Software defined networking (SDN) enabled by, for example, the OpenFlow protocol is a potential solution to improve the flexibility and agility of the mobile data network by decoupling […]
Read moreThe combination of elastic optical networks (EONs) and software-defined networking (SDN) leads to SD-EONs, which bring a new opportunity for enhancing programmability and flexibility of optical networks with more freedom for network operators to customize their infrastructure dynamically. In this paper, we investigate how to apply multidomain scenarios to SD-EONs. We design the functionalities in […]
Read moreNowadays, network management has become difficult because of tremendous increase on IP traffic demands. At this point, a flexible and dynamic control mechanism is needed that diminishes the complexity of physical topology. Software Defined Networking (SDN), is one of the proposed next generation technologies to overcome this problem. SDN paradigm provides a simple management strategy […]
Read moreConfiguring range based packet classification rules in network switches is crucial to all network core functionalities, such as firewalls and routing. However, OpenFlow, the leading management protocol for SDN switches, lacks the interface to configure range rules directly and only provides mask based rules, named flow entries. In this work we present, ORange, the first […]
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