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Network function virtualization (NFV) is a concept aiming to achieve telecom grade cloud ecosystem for new generation networks focusing on Capital and Operational expenditure (CAPEX and OPEX) savings. Keeping at least the same performances is one of the main requirements of the applications when being virtualized. This work presents a performance impact of Open Virtual Switch (OVS) user-space forwarding...
In this paper we present the engineering of a non-volatile 1S1R memory based on a Phase-Change Memory cell (PCM), consisting in a GeN/Ge2Sb2Te5 layer, stacked with a GeSe-based Ovonic Threshold Switching selector device (OTS). We optimize and analyze separately the two devices, and we propose for the first time an innovative reading strategy of the cross point device, enabled by the improved sub-threshold...
IPv6 is a technology that provides enormous address space and end-to-end communication, features that are required in the context of the device automation integration for future network. The transition to IPv6 holds the future of the internet infrastructure. Software-defined networking (SDN) defines a new concept for computer networks that can separate and provide abstract elements of network devices...
In this paper, we propose a distributed storage system which relocates data blocks autonomously among the storage nodes. In the system which is composed of heterogeneous storage nodes, there are performance gaps among the storage devices. The storage tiers are made by such gaps in the system. When frequently accessed data blocks are placed on improper storage tier, system performance may decline....
Software Defined Networking (SDN) and OpenFlow represent the most commonly deployed approaches of the so called Programmable Networks. SDN is an emerging network architecture, which performs the subdivision of control plane and data plane and allows greater speed, greater scalability, and greater ductility in terms of routing and forwarding. OpenFlow, instead, is an SDN component that characterizes...
The concept of network virtualization offers the promising possibility for parallel deployment of network solutions that can be based on different protocol stacks. The way of implementation of network virtualization plays essential role in deployment of the mentioned concept. This paper proposes a novel solution for implementation of the IPv6 QoS System in the virtualized environment. This system...
Network virtualization in cloud computing environment has attracted many attentions recently. With the help of network virtualization, VMM is able to provide fine-grained isolation among different VMs. However, the performance and overhead introduced by network virtualization is also important concerns when applying network virtualization to the cloud computing environment. In this paper, we evaluated...
The overhead portion especially for a small packet is one of the most significant parameters that can lower the efficiency of the link utilization. Therefore, many traditional hop-by-hop header compression techniques were introduced to reduce the amount of packet header before transmission. However, those techniques still cannot overcome the time performance issue as compression mechanism requires...
This paper presents the performance evaluation of two Source Specific Multicast (SSM) protocols for IP networks: Protocol Independent Multicast (PIM) SSM and Lightweight PIM (LPIM). PIM SSM provides reliable, low latency IP Multicast transport services, but at the cost of high overhead in the signalling plane. The main design objective of LPIM is to improve PIM SSM scalability and to provide global...
Session switching or session transfer across devices has become a common feature in today's telecommunication world, given that a single user could easily own more than one device. However, most of the systems in the literature are designed for homogeneous network, i.e. switching session within a common network such as across only IP devices. In this paper, we design a prototype to support session...
High availability WAN connectivity can be achieved with a single service provider link built with high quality hardware, redundancy, and SLA guarantees, or by bundling a number of inexpensive connections together, similar to RAID for computer storage. In this paper, we investigate the performance of a Redundant Array of Independent Internet Connections (RAIIC). We discuss proper planning and signaling...
The volume of Internet traffic over 3G wireless networks is sharply rising. In contrast to many Internet services utilizing replicated resources, such as Content Distribution Networks (CDN), the current 3G standard architecture employs hierarchical routing, where all user data traffic goes through a small number of aggregation points using logical tunnels. In this paper, we study the performance implications...
Application migration is a promising technique to enable users of computational devices to continue a task even though the executing device changes. One key challenge to realise application migrations is to maintain the network sessions in case a network based application is migrated. This article presents a solution to maintain network sessions in application migration scenarios. We develop a prototype...
By using SNMP to collect network layer and data link layer information, network topologic can be discovered. This article presents how to get topologic from network step by step. An algorithm is also given for removing duplicate connections on map if VLAN exists.
In this work, we analyze the design of green routing algorithms and evaluate the achievable energy savings that such mechanisms could allow in several realistic network scenarios. We formulate the problem as a minimum energy routing optimization, which we numerically solve considering a core-network scenario, which can be seen as a worst-case for energy saving performance (as nodes cannot be switched...
Multiprotocol Label Switching (MPLS) is an Internet Engineering Task Force (IETF) specified framework that provides for the efficient designation, routing, forwarding and switching of traffic flows through the network. MPLS is a versatile solution to address the problems faced by present-day networks like speed, scalability, quality-of-service (QoS) management, and traffic engineering. MPLS carries...
Cluster technology has witnessed a tremendous inception in computing world. The technique integrates the standard computing resources to generate more processing power and other hardware strengths. The collection of interconnected stand-alone computers ensures high availability, increased throughput, scalability and improved performance. We have developed a dynamic cluster based approach for high...
The application of Switched Ethernet is becoming more and more popular on the platforms of ships and aircrafts. On such specific platforms, Switched Ethernet is greatly appreciated by its low-cost and flexibility, meanwhile, its real-time performance is greatly challenged. Therefore, evaluation of Switched Ethernet's performance, that is, a reliable analysis on its real-time performance, plays a very...
This paper gives a new design for Ethernet/IP intelligent communication modules (EIICM). The new EIICM module not only acts as the network communication module for the PLCs to facilitate the communications between the PLCs and the remote network devices, but also it acts as the CPU of the built-in operation switch to perform the network topology monitoring and maintenance, IGMP snooping, and switch...
Automatic network topology discovery is important for network management and network analysis in ITSM system. Issues like network environment configuration, performance testing and fault detecting all require accurate information of the network topology. According to the requirement of the ITSM system, in this paper we propose an efficient algorithm that is based on SNMP for discovering Layer 3 and...
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