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We review the statistical network assessment process (SNAP) and apply it to the analysis of two different network topologies. Using SNAP, we identify topological bottlenecks and we test the effectiveness of physical layer solutions in unlocking them. We show how selected introduction of spatial division multiplexing (SDM) through fiber doubling enables to achieving a 63% and 12% capacity increase...
Since traffic engineering (TE) in Software Defined Networking (SDN) can be much more efficiently and intelligently implemented, Multipath in SDN becomes a new option. However, Ternary Content Addressable Memory (TCAM) size become the bottleneck of SDN. In this paper, we propose an SDN-based Dynamic Flowentry-Saving Multipath (DFSM) mechanism for inter-DC WAN traffic forwarding. DFSM adopts source-destination-based...
In applications of Wireless Sensor Networks (WSNs), all data packets are directed towards a single base-station (BS) over multi-hop routes. The BS is usually responsible for processing the collected data and interfacing the WSN to remote users. The continuous flow of packets towards the BS enables the adversary to analyze the traffic and uncover the BS position. In this paper, we present a technique...
For the first time, re-provisioning is introduced into advanced reservation enabled optical transport networks as a novel perspective for optimization. Demonstration results show parallel service re-provisioning (PSRP) can improve the efficiency of network resource significantly.
Two network-wide optimization contexts are traffic engineering and topology optimization. Various optimization objective functions and metrics have been proposed for both contexts. Yet, it is hard to evaluate the efficiency of those optimization objectives. Previously, a study analyzed the efficiency of some optimization metrics for traffic engineering by using linear programming (LP). On the other...
With the integration of cores increasing, the on-chip-network (NoC) latency and the throughput are getting worse in traditional structures. This paper proposed a novel parameter-based on the hierarchical mesh interconnected NoC (PHMNoC) to improve the integration and performance. We use structural parameters and cross-layer threshold parameter to achieve scalability for different system size and balance...
We propose a novel optimal data placement technique considering not only the data locality but also the global data access cost to improve the performance of MapReduce in cloud data centers. We first conducted analytical and experimental study to identify the performance issues of MapReduce in data center and show that MapReduce tasks which are involved in unexpected remote data access take much more...
In this paper, we propose a novel re-restoration mechanism based on fuzzy fault set under multi-faults in optical transport networks. This new scheme inherits from our already proposed FFS (fuzzy fault set) based restoration mechanism which is a reasonable trade-off between the recovery success rate and the remaining network risk resources. We mainly consider the link faults in the simulation because...
The Network-on-Chip (NoC) offers flexible and scalable communication architecture for many-core systems in the future. The routing algorithm dominates the system performance with more complicate communication and scaling. However, with the amount of processors increasing, congestion happened easily when most of the processors need to access the memory. In order to solve processor-memory accessing...
This paper introduces a cognitive green topology management scheme for future 5Gnetworks, which can be used to reduce energy consumption in low traffic scenarios. The scheme is based on a backhaul link selection algorithm which aims to concentrate distributed traffic on fewer backhaul links by exploiting backhaul link diversity from other cells. A reinforcement learning based resource assignment algorithm...
Using virtual networks is a good solution to provide customized networking services in the cloud and to isolate the performance of applications running in the cloud. Cloud providers usually oversubscribe their data centers to reduce the costs imposed to customers and naturally, oversubscription can lead to network overload. If the situation is not managed carefully, it can hurt the customers' experience...
The nodes near sink in wireless sensor networks are featured with heavy transmission loads, so these performance bottleneck nodes are prone to running out of energy early with shortened network lifetime. Routing tactic plays important role on transmission performance and energy consumption of network. In this paper, we enumerate typical source routing tactics in Grid topology, include 1) Random Equal...
Network engineers and designers need additional tools to generate network traffic in order to test and evaluate, for instance, application performances or network provisioning. In such a context, traffic characteristics are the most important part of the work. Indeed, it is quite easy to generate traffic, but it is more difficult to produce traffic which can exhibit real characteristics such as the...
This demo deals with a new orchestrator, the OFVN controller, specifically designed, according to the SDN principles, to deliver Cloud services with IT and network resources requirements.
Oversubscription of intra-Data Center network links and high volatility of VM deployments require a flexible and agile control of Data Center network infrastructures, also integrated with computing and storage resources. In this scenario, the Software-Defined Network paradigm and, specifically, the OpenFlow protocol, opens up new opportunities for the design of innovative resource management platforms...
In dynamic topology of the MANET's nodes are having the high mobility in nature. Because of the dynamic nature of nodes very difficult to find the exact location of node in network for data delivery. Here we proposed that to find the exact location of node and ensure the data delivery to destination. In existing system, the location aided routing mechanism where used to find location of node. In this...
As the number of modules grows, performance scalability of planar topology Networks-on-Chip (NoCs) becomes limited due to the increasing hop-distances. The growing hop-distance affects both end-to-end network latency and overall network saturation. Hierarchical topologies provide better traffic hop distance and therefore are more adequate for large systems. However, the introduction of hierarchical...
In previous work, we proposed an Autonomic Network Performance Management (ANPM) framework that follows a control-theoretic approach. We built and verified the framework using network simulations but there were many questions needed to be accurately answered concerning the feasibility of such framework in real networks. In this paper, we are going from simulation to testbed implementation to accurately...
Wireless sensor networks based on the IEEE 802.15.4 standard is able to achieve low-power transmissions in low-rate and short-distance wireless personal area networks (WPANs). It employs the slotted carrier sense multiple access with collision avoidance (CSMA/CA) in the contention access period (CAP). Unfortunately the periodic broadcast beacon frame is transmitted without CSMA/CA so that it could...
With popularity of data centers, energy efficiency of Ethernet switches in them is becoming a critical issue. Most existing energy saving approaches use a centralized methodology that assumes global knowledge of data center networks. Though these approaches can achieve nearly optimal energy saving for static traffic patterns, they are not suitable when the traffic patterns can change rapidly or the...
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