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.
Delay Tolerant Network (DTN) is a type of network that permanent connections between nodes are not always available. Routing in DTN uses store-carry-and-forward scheme, where nodes store and carry data until a suitable message carrier appears. Positive social characteristics such as centrality and friendship can be used to make a better routing decision in DTN. However, negative social characteristics...
High reliability performance of network is essential to minimize the possible network service interruption time, particularly in optical backbone networks where a large amount of data can be affected by a single failure. The existing studies on improvement of network reliability performance assume that failures of network devices are not related to the traffic load, which on the other hand, is not...
Over the past two decades, implementing routing lookups in dedicated hardware has been accepted as an undisputable gold standard in core Internet routers due to ever increasing performance requirements and unabated global routing table growth. Several recent proposals depart from that line of thinking and suggest that software algorithms running on commodity multi-core CPUs might (again) become well...
For reenterable models of IP networks with dynamic routing according to RIP protocol, measuring subnets for QoS parameters evaluation have been essentially modified and extended. Online algorithms of statistical analysis have been specified by colored Petri nets. The mean and variance of the packet delivery time have been evaluated. As a result, the computation precision has grown and an essential...
Gradient errors in device arrays cause mismatch between device parameters, which in turn degrade linearity performance of data converters realized with these arrays. A practical “outputs averaging” technique for string DACs is presented to release complex routing problems in gradient reduction patterns. An N-bit string is divided into multiple substrings and the substrings' outputs are averaged to...
Mobile devices have changed from being terminal equipment for making voice calls, video calls, playing games and sending messages to including differing functionalities such as acting as a server and client for sharing information. Information sharing directly between modern mobile phones can be done using Bluetooth or WiFi functionalities. Such a network does not need a fixed infrastructure, thereby...
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...
This paper evaluates the performance of the first-last-exact fit spectrum allocation policy for elastic optical networks. The first-last-exact fit spectrum allocation policy is intended to increase the number of aligned available slots and avoid small contiguous available slots, and hence suppresses the blocking probability. This policy separates the allocation of disjoint and non-disjoint connections...
In this paper, we introduce the mixture communication method of single-flit and wormhole routing. In the method, a buffer memory is shared in each link and virtual channels are assigned. We also evaluated the dynamic communication performance with various amount of buffers. As a result, it was shown that the communication performance could be predicted from the packet length.
Jamming is one of the most famous and powerful attacks in wireless networks, and is advancing to be more stealthy and long-lasting with limited energy. Stealthy attackers transmit short jamming signals to become less detectable with less energy, and yet powerful enough to ruin the entire packet transmission procedures. For this study, we deal with three types of stealthy attacks: 'reactive jamming',...
To take advantage of software defined networking (SDN) within a limited budget constraint, a natural strategy is to incrementally deploy a few SDN switches (and a limited amount of additional link bandwidth) into the legacy optical network. In such a hybrid optical network, operators can only change the routes of flows that traverse SDN switches. Therefore, to optimize SDN deployment, it is essential...
Congestion in Wireless Multimedia Sensor Networks (WMSN) may cause packet loss, buffer overflow and increases queueing delay, which has a significant negative impact on the network performance and reliability. This problem imposes more resource constraints that involve energy consumption and buffer size to meet additional requirements such as desired buffer size and limited amount of packet loss....
The emerging Internet of Things (IoT) involves integrating and forwarding data generated by heterogeneous sensing devices (IoT devices). The data is sent using various wireless technologies to application servers present in the IoT cloud via intermediate gateways. Using traditional routing techniques to connect millions of IoT devices to the Internet result in congestion and overloading of gateways...
Process variability is known to be increasing with technology scaling in IC fabrication, thereby degrading the overall performance of the manufactured devices. The current paper focuses on the variability effect in FPGAs and the possibility to boost the performance of each device at run-time, after fabrication, based on the individual characteristics of this device. First, we develop a sensing infrastructure...
Intrinsic device variability has become a significant problem in deep sub-micron technology nodes. The stochastic variations in device performance, which are a result of structural irregularities at the atomic scale, can impact both the yield and reliability of a circuit design. In this paper we describe a novel multi-reconfigurable FPGA architecture, the programmable analogue and digital array (PAnDA),...
With NoCs (Networks-on-Chips) becoming a central part of today's many-core systems, ensuring a good level of performance at the routing level has never been so crucial. In previous works, we have introduced a novel method for designing fully adaptive deadlock-free routing algorithms for NoCs called ESPADA (EScape PAths with Dynamic channel Acquisition). The strength of our approach lies in its ability...
Many IP address lookup approaches employ Bloom filters to obtain a high-speed search performance. Especially, the search performance of trie-based algorithms can be significantly improved by adding Bloom filters, because Bloom filters can determine whether a node exists in a trie without accessing the trie. The false positive rate of a Bloom filter must be reduced to enhance the lookup performance...
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...
As the practical propagation environment suffers from various fading, investigation of a suitable routing protocol for this type of environment is need of the day. Many routing protocols have been evaluated for idle conditions but none of them have taken actual physical environments such as fading, etc. into consideration. In this paper, that particular Issue has been addressed. Three most popularly...
Achieving energy efficiency has recently become an essential aim of networking research due to the ever increasing power consumption and CO2 emissions generated by large data networks. For this problem, the emerging paradigm of Software-Defined Networks (SDN) can be seen as an attractive solution. In these networks an energy-aware routing model could be easily implemented leveraging the control and...
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.