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Network Function Virtualization (NFV) and Software-Defined Networking (SDN) are two paradigms that have attracted much attention in the networking field. The first permits the implementation of Network Functions (NFs) on commodity servers located in datacenters. The second facilitates the management and routing of network flows by controllers. While recent work has mostly explored the use of NFV and...
In this paper, we propose an OpenFlow-assisted framework for P2P (peer-to-peer) live streaming, which incorporates an OpenFlow-assisted architecture and an OpenFlow-assisted algorithm. The architecture combines the characteristics and advantages of both BitTorrent system and OpenFlow network. The algorithm can dynamically calculate the path and corresponding available bandwidth for each flow according...
With the explosive growth of mobile user in Massively Multiuser Virtual Environments (MMVE), it faces a challenge, how to deal with the request of rapid growth and reduce traffic to shorten the response time. Fog computing is a novel solution to free users from the requirement of hardware. We introduce a tree network to manage connecting layer in fog computing, which is termed as CAN (content-addressable...
Due to the variability of network topologies and services that can be deployed in the transport network, traffic engineering decisions within a software defined networking (SDN) controller need to be influenced by the current network topology, available resources, and end user experience. In this work a holistically approached traffic engineering quality of experience (QoE) feedback application is...
For efficient operation of automated control systems for complex organizational-technical objects, you must provide certain information services to officials and automation systems. This is achieved through the functioning of the information subsystem of the automated control system with the required performance indicators. Information subsystem of the automated control system by providing information...
Federated networks have primarily emerged to support cloud computing services, in order to reduce costs for providers, as well as to increase their incomes. Up to now, the research activity has been mostly focused on architectures and cost models, setting aside technological aspects. In this paper, we propose SDNS, an SDN-system that opens the application fields of federated networks to federated...
Routing messages over vehicular ad hoc networks (VANETs) is usually achieved through geographic routing protocols. In such networks, the vehicle dynamics causes rapid changes on the vehicle density and the communication links. In order to be efficient to route messages from a vehicle to another, we need to locate each node (its position), this is achieved by a location service. This study works on...
Mobility is a major problem in urban centers and vehicular networks have been a focus of study in the attempt to create applications focused on intelligent transport systems (ITS). With that in mind, ITS initiatives act as a possible solution to improve the functioning and performance of traffic systems, reducing congestion and increasing security for citizens. In this way, the present work presents...
In order to integrate a large number of distributed energy resources in distribution grids a robust decentralized information and communication control structure is required. This paper proposes an overlay peer-to-peer (P2P) architecture for controlling and monitoring microgrids in real time, which has a great capacity of adaptation to the demanding network requirements of these environments. The...
Nowadays many companies and organizations choose to deploy their applications in data centers to leverage resource sharing. The increase in tasks of multiple applications, however, makes it challenging for a data center provider to maximize its revenue by intelligently scheduling tasks in software-defined networking (SDN)-enabled data centers. Existing SDN controllers only reduce network latency while...
Anycast-based services today are widely used commercially, with several major providers serving thousands of important websites. However, to our knowledge, there has been only limited study of how often anycast fails because routing changes interrupt connections between users and their current anycast site. While the commercial success of anycast CDNs means anycast usually works well, do some users...
In this paper, the basic methods of routing organization in software-configurable network are considered. The efficiency of the implementation of routing SDN networks are evaluated using a specially designed setting — delays in the routing domain. Evaluates the effectiveness of routing under various principles of organization SDN-Controller and the various protocols for implementing an interface between...
Network load-balancers generally either do not take application state into account, or do so at the cost of a centralized monitoring system. This paper introduces a load-balancer running exclusively within the IP forwarding plane, i.e. in an application protocol agnostic fashion - yet which still provides application-awareness and makes real-time, decentralized decisions. To that end, IPv6 Segment...
This paper proposes a collaborative in-network caching method for multi-path routing. In-network caching allows routers in networks to store contents in their caches and users can download the contents from the routers in addition to content servers. In such a situation, the proposed method introduces a joint optimization problem of in-network caching and multi-path routing, which is formulated as...
Recent years have witnessed a new content delivery paradigm named crowdsourced CDN, in which devices deployed at edge network can prefetch contents and provide content delivery service. Crowdsourced CDN offers high-quality experience to end-users by reducing their content access latency and alleviates the load of network backbone by making use of network and storage resources at millions of edge devices...
As the Internet keeps growing, online video has become a great part of the current Internet data traffic, which will take over 80% of Internet traffic according to Cisco's report. Also, new and more heavyweight applications keep developing to fulfill people's growing requirements, like 4k resolution and visual reality videos. However, one single service provider, like a Content Delivery Network (CDN),...
Content Delivery Networks (CDNs) are able to improve user-oriented application performance through caching and anycast routing or DNS-based user mapping mechanism. With the fact that BGP is widely used for inter autonomous system (AS) routing for CDNs, there is a middle mile bottleneck problem, which cause by the nature limitation of BGP. To solve this problem, we propose an SDN-based tunnel multi-path...
Micro-clouds infrastructures allow supporting applications on local and energy-efficient resources. Communication between micro-clouds takes place on shared and non-dedicated Internet links. Network control and optimization can only happen at the edge. For availability and persistence, the storage of application data must be geo-replicated. Maintaining strong data consistency under concurrent accesses...
We consider a parallel-server system with K homogeneous servers where incoming tasks, arriving at rate λ, are dispatched by n dispatchers. Servers are FCFS queues and dispatchers implement a size-based policy such that the servers are equally loaded. We compare the performance of a system with n> 1 dispatchers and of a system with a single dispatcher. Every dispatcher handles a fraction 1/n of...
Distributed cloud networking builds on network functions virtualization (NFV) and software defined networking (SDN) to enable the deployment of network services in the form of elastic virtual network functions (VNFs) instantiated over general purpose servers at distributed cloud locations. We address the design of fast approximation algorithms for the NFV service distribution problem (NSDP), whose...
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