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Recently, there are significant advances in the areas of networking, caching and computing. Nevertheless, these three important areas have traditionally been addressed separately in the existing research. In this paper, we present a novel framework that integrates networking, caching and computing in a systematic way and enables dynamic orchestration of these three resources to improve the end-to-end...
The modern semiconductor fabricator needs both accurate and fast cycle time (CT) forecasts. Due to complexity of development and computational intractability, simulation may be supplemented by queueing network methods. In this paper, we develop extensions to approximation methods for queueing networks that are suited for fab modeling using decomposition without aggregation. We conduct simulation experiments...
Data center networks with random topologies provide several promising features, such as near-optimal bisection bandwidth and flexibility of incremental growth. However, network failures are ubiquitous and significantly affect the performance of cloud services, such as availability and bandwidth. Existing random topology based data centers do not provide specific fault-tolerance mechanisms to recover...
Information-Centric Networking (ICN) is proposed to address the inefficiency of content delivery of IP networks from the perspective of architecture. In contrast, Content Delivery Network (CDN) is an overlay solution in current IP networks. We believe that even though ICN is fully deployed, there is still a role for CDNs to play in ICN networks. Since ISPs in ICN will replicate and forward contents...
Recent Data center network topologies put forward multiple paths between the end hosts to provide high bisection bandwidth. For the sake of efficient utilization of multiple paths many load balancing techniques are proposed in the literature. These load balancing proposals mainly deal with distribution of traffic among multiple paths. While balancing the traffic among multiple paths, few proposals...
In the traditional Publish/Subscribe (Pub/Sub) paradigm, most of the responsibilities lie with the broker, thus making it burdened. It also takes a considerable amount of time to first route the publications and subscriptions towards the broker, and then to further route the notifications to the subscribers. This leads to delays in data delivery. Besides delay and bandwidth consumption, the number...
The purpose of this work is to promote an improvement of backbone networks in terms of availability and remote access. It especially focuses on network environments based on a hub and spoke topology. The significant findings indicate that data isolation, data encryption and encrypted dynamic routing information transmission are the main requirements for backbone network security. In addition, due...
Network Function Virtualization (NFV) is an emerging approach that has received attention from both academia and industry as a way to improve flexibility, efficiency, and manageability of networks. This flexibility can be leveraged to allow for a better optimization of Virtual Network Functions (VNFs), which can now be dynamically placed in the network to adapt efficiently to both network constraints...
Performance of software routers is limited by the speed of operating system network protocol stack. A faster network protocol stack can be implemented in user space by utilizing parallelization and different optimization techniques. In this work we will demonstrate an efficient implementation of the IP lookup algorithm in user space with multibit trie structures. Afterwards, we will demonstrate the...
Many routing algorithms for vehicular ad-hoc networks have relied on geographic forwarding as a means to reduce the paths' sensitivity to individual vehicle movements. In recent years, the basic forwarding strategies have been refined to create road-based paths, connecting successive road intersections selected on the basis of the connectivity between them. Revisiting this idea, we present two different...
Aim of this work is to create architecture by using a novel architecture composed from two logical domains - Core Management Domain and SDN/NFV domain. Core Management Domain (CMD) can be used as the means for interconnecting domains implemented and deployed by various network providers, public or private clouds or just by simple devices acting as NFV enabled devices that can create and chain virtualized...
The overlay network has been widely developed in recent years. There may be various overlays that co-exist with each other upon the same underlying network. These overlays have heterogeneous performance goals, and they will compete for the physical resources, so that a sub-optimal performance of the overlays may be achieved. Moreover, the heterogeneity of the overlays makes them difficult to coordinate...
BGP (Border Gateway Protocol) protocol is unique dynamic routing protocol used for exchanging information about network routes and network reachability, what is used in communication among ASs (Autonomous systems) worldwide. Over the decades of its existence it become de facto part of the Internet backbone, because it helps to interconnect ISP networks to each other and help in effective network data...
Within Content Delivery Networks (CDNs), users are typically geographically load-balanced across multiple servers in order to provide better performance and locality – users are assigned to the content servers close to them. One approach to user-server assignment is the use of IP anycast, where all the content servers use the same IP address. A user request is then routed to the server closest to...
Live Virtual machine (VM) migration is a promising solution for data center (DC) administrators to achieve a wide range of objectives - from load balancing to disaster evacuation. Ideally, live VM migration is seamless and the challenge is to minimize the downtime during which the VM is not responding to requests or providing the service. The duration of the downtime is mainly influenced by the migration...
ETRI distributed cloud platform provides customers with optimal computing and storage resources over remotely distributed micro datacenters connected over multi-domain transport networks. It requires dynamic SDN control to utilize transport network resource efficiently. This paper introduces implementation of transport network orchestration to control multi-domain transport networks for the distributed...
Cloud computing controls the increasing energy consumption of applications by consolidating them in shared servers through virtualization. This technique can be greatly improved and complemented by choosing an optimal data center for each Virtual Machine (VM). That dynamic optimization problem was stated as a Mixed Integer Linear Programming (MILP) model that minimizes operational expenditures, while...
This paper proposes an extension of IPv6 neighbor discovery (ND) for rapid network prefix and service discovery in vehicular networks. It is assumed that a vehicle as a moving network (MN) or a road-side unit (RSU) as a fixed network (FN) has an external network interface, and hosts in an MN periodically announce their services to their local DNS Server called recursive DNS server (RDNSS) of the MN...
Recently, content centric networking (CCN) attracts attention as a next generation network on which every router forwards a packet to another router and also functions as a server. A CCN router has a forwarding table called FIB (Forwarding Information Base) but its table look-up can become a bottleneck. In this paper, we propose FIB data structure for CCN routers which can reduce the number of comparisons...
Network Functions Visualization (NFV) builds upon virtualization technology and allows the decoupling of network services from dedicated and complex hardware-based appliances. This decoupling allows network providers to install these functions in commercial off-the-shelf hardware reducing the overall capital and operational expenses. In order to provide complete and high quality services to the end...
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