The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
Data centers are experiencing tremendous growth in the number of servers and networking devices with an increase in traffic to cloud infrastructures. Data center network (DCN) topology plays an important role in providing acceptable level of performance to cloud applications. This paper presents the results of a simulation studies comparing the performance of several well-known DCN topologies under...
On large scale disasters, such as the Eastern Japan Great Earthquake and Kumamoto Earthquake, due to mud slides of cliff and floodwater of rivers, many disaster areas are physically isolated and relief and support activities of victims become quite difficult. The communication means are also destructed in those areas and cannot transmit the disaster information. In order to resolve those problems,...
Mobile Ad-hoc Network is one of the popular technologies among the various wireless technologies. The MANET is an ad-hoc technology and inherits the properties of mobility, wireless connectivity and independence. In one side it demonstrates the advantage over applications on the other side that is complicated to manage. Therefore the routing protocols are an essential component of the entire network...
This paper proposes a new congestion control method based on a hop-by-hop rate control in named data networking (NDN). The proposed method suppresses the excessive reduction of Interest sending rate due to continuous negative acknowledgement (NACK) packets caused by the propagation delay. The proposed method limits the rate reduction to once per congestion. The point of our method is not to change...
In this paper, we investigate the scalability of CCNx, open-source CCN (Content-Centric Networking) implementation, in terms of the number of nodes. As performance metrics, we measure the total throughput of content deliveries, the packet loss ratio in the network, and the average content delivery time. We also examine the performance bottleneck of CCNx through system-wide profiling, which quantitatively...
Wireless mesh networks are difficult to be characterized, especially under multi-hop traffic streams. The problem is that the local view of the channel and the correlation between the buffers of consecutive nodes in a stream path make complicated the identification of the contention level perceived by each station along the time. Such a figure is used in the models based on the so called decoupling...
This paper presents the design and performance evaluation of an integrated hybrid MAC and topology control scheme (abbreviated IMTC) for machine-to-machine (M2M) area networks that require comparatively the high data rate communications. In order to maximize the network performance, IMTC is designed with a cross-layer concept of MAC and network layers, which provides the multi-channel TDMA scheduling...
As the number of processing elements which can be placed on a single chip doubles about every two years, both System-on-Chip (SoC) and the microprocessor market call for high-performance, flexible, scalable, and design-friendly interconnection network architectures [1]. Network-on-Chip (NoC) has been proposed as a solution to multi-core communication problems. The advantages of NoC include high bandwidth,...
In multicore systems, low transmission delay and high throughput are essential to fully harness the computational power offered by tens or hundreds of cores. In this paper we present a new NoC architecture (M8NoC) by devising changes to the topology and routing of the simple mesh network. The changes allow overcoming some limitations of the mesh network by decreasing the diameter, decreasing the average...
A significant challenge in wireless sensor networks is the transmission of data from a large number of nodes to a central collection point. This is commonly called converge-cast communication. At present, the IEEE 802.15.4 and ZigBee standards are widely used in the design of wireless sensor networks. The latter standard defines a methodology for converge-cast communication in tree-based network topologies...
Without any pre-existing fixed network infrastructure with rapid configuration of wireless connections on-the-fly, network topology in MANETs keep on changing rapidly. Thus achieving data transmissions between wireless nodes in MANETs with improved QoS parameters become a challenging issue. To achieve this one has to concentrate on the routing protocol they choose. In our paper we proposed an algorithm...
Wireless internet has become popular in recent years due to the tremendous growth in the number of mobile computing devices and high demand for continuous network connectivity regardless of physical locations. In this paper, we investigate the effects of routing protocols on the performance of Transmission Control Protocol (TCP) variants in multi-hop wireless networks. Through simulations we study...
Considering lack of comparative studies on Ping-pong movement, comprehensive evaluations were carried out to estimate the impact of layer-3 handoff latency on End-to-End TCP for mobile IPv6 and its extensions. Results show that FHMIPv6, which has 273ms overall handoff delay, 93.867 Kbytes/s average goodput and 9.125% packet loss rate, performs better than HMIPv6 and FMIPv6 frameworks under Ping-pong...
We investigate the performance of IEEE 802.15.4 MAC (Medium Access Control) sublayer in beacon-enabled tree-topology Wireless Sensor Networks (WSNs). To our knowledge, current literature has mostly focused on relatively simpler star topology or non-beacon-enabled peer-to-peer networks. In our work, we first respectively evaluate the impact of different traffic loads from the source nodes in each depth...
Heterogeneity is one of the challenges in the current NoC design which forces designers to consider irregular topologies. Therefore, finding an optimal topology with minimum cost (minimum use of links, buffers, NIs, etc) and power consumption, and maximum flexibility can provide the best cost-performance trade-off. Irregular mesh is a topology which combines the benefits of regularity and advantage...
Networks-on-chip (NoCs) have emerged as an alternative to ad-hoc wiring or bus-based global interconnection in Systems-on-Chip (SoCs). The architecture of network significantly determines system performance. This paper proposes a network on chip architecture with 2-demention mesh topology, odd-even routing algorithm, wormhole switching technique and only input buffers. The size of packet is 20 bytes...
We describe the implementation and evaluation of a network simulator 2 (NS-2) module for the datagram congestion control protocol, or DCCP. Our module, based on an updated standard described in RFC 4340, attempts to model the behavior and performance of the two currently defined congestion control identifiers CCID2 and CCID3. The behavior, throughput, and fairness of DCCP in comparison with TCP were...
The actual traffic data collected on various applications specific on-chip networks exposed that the network traffic is self-similar in nature. In this work, modeling of self-similar traffic by aggregation of a large number of on-off Pareto sources has been discussed. We have developed a cycle accurate network simulator for evaluating the performance of wormhole router based network by varying locality...
We propose a novel framework to critically analyze a given MAC protocol for wireless ad hoc networks with respect to its correctness criteria and performance metrics. The framework is composed of wanted state generation and test scenario generation algorithms. The wanted state generation algorithm generates a set of conditions that meet our study objective. The test generation algorithm then generates...
In this paper, we present a methodology for modeling, analysis and generation of NoC topology. Specially, our optimization framework of static and dynamic properties ensures core-to-core communication of the complete network. Our approach (1) fully exploits the regularity of standard topology and the flexibility of application-specific topology (2) generates a scalable network containing heterogeneous...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.