Serwis Infona wykorzystuje pliki cookies (ciasteczka). Są to wartości tekstowe, zapamiętywane przez przeglądarkę na urządzeniu użytkownika. Nasz serwis ma dostęp do tych wartości oraz wykorzystuje je do zapamiętania danych dotyczących użytkownika, takich jak np. ustawienia (typu widok ekranu, wybór języka interfejsu), zapamiętanie zalogowania. Korzystanie z serwisu Infona oznacza zgodę na zapis informacji i ich wykorzystanie dla celów korzytania z serwisu. Więcej informacji można znaleźć w Polityce prywatności oraz Regulaminie serwisu. Zamknięcie tego okienka potwierdza zapoznanie się z informacją o plikach cookies, akceptację polityki prywatności i regulaminu oraz sposobu wykorzystywania plików cookies w serwisie. Możesz zmienić ustawienia obsługi cookies w swojej przeglądarce.
In this paper, we propose an intelligent inter-ring route control, called fuzzy inter-ring route control with PRNN predictor (FIRC-P), for the bridged resilient packet rings (BRPR). The FIRC-P contains three functional blocks implemented by fuzzy logic systems or pipeline recurrent neural networks (PRNN): fuzzy bridge-node congestion indicator (FBCI), PRNN downstream-node fairness predictor (PDFP),...
We present a multi-objective optimization approach for joint throughput optimization and traffic engineering, where the routing request of traffic arrives one-by-one. We provide an Integer Linear Program (ILP) that simultaneously i) maximizes the aggregate throughput, ii) minimizes the resource consumption, and iii) minimizes the maximum link utilization. We study the impact of optimizing the three...
In recent years, along with the increasing popularity of multi-hop wireless networks, there has been a growing demand in the coupling of these networks to external ones such as the Internet. As traffic destined for external networks increases, special attention is required not only in gateway selection, but also in optimized routing and scheduling in order to maximize the network performance. In this...
The relay technology is an essential piece of LTE-Advanced in its pursuit of cost effective capacity enhancement and coverage extension. Simple RF repeaters have been widely used in cellular technologies to offer coverage extension. However, they cannot distinguish desired signals from interference and noise and are unable to operate with sophisticated mechanisms, such as power control, beam-forming,...
More complicated computational tasks are posed to the network equipments, such as Deep packet inspection (DPI) for network security check and network coding to achieve efficient multicast, etc. These complicated applications need processors to process the whole packet payload, potentially causing low throughput and long latency due to the large access delay to external memories. The behind hint lies...
In mobile ad hoc networks, multi-channel communication, compared to single-channel communication, can significantly improve the throughput of the networks. Channel assignment and routing are two basic issues in multi-channel networks. In this paper, we firstly present a channel assignment scheme for location service in multi-channel mobile ad hoc networks. The proposed channel assignment algorithm...
This paper proposes an intelligent rate controller for the Internet traffic. Called the IntelRate (Intelligent Rate), it is a router-based controller and uses the fuzzy logic control approach to adjust the source sending rate based on the instantaneous queue size of the router. Unlike other explicit congestion control protocols, the IntelRate controller need not evaluate the link states (such as bottleneck...
Cognitive radios (CR) and cooperative communications represent new paradigms that both can effectively improve the spectrum efficiency of future wireless networks. In this paper, we investigate the problem of cooperative relay in CR networks for further improved network performance. The objective is to provide an analysis for the comparison of two representative cooperative relay strategies, decode...
In multihop wireless networks, end-to-end throughput is often hard to predict and is even harder to optimize due to the effect of interference. To date there is no precise result other than asymptotic bounds for this question: if there is no routing information given, what is the maximum throughput of a network using uncoordinated transmission such as IEEE 802.11 MAC? This paper attempts to address...
Under the network environment, the Network topologies will change which leads to the changes of the routes for the moving characteristic of the nodes. We analyze the effects on TCP RQB caused by the changes of the routes in AD hoc and present the modified methods for TCP RQB, which is called TCP RQB-R, on the basis of the theory above. By identifying dynamically the changes of routes in the method...
With the current limitations of network technology, jumbo frames provide a mechanism that can allow greater amount of data transfer efficiently on cables. Implementation of jumbo frames is a viable option on Gigabit Ethernet. In this research undertaking, the authors implement jumbo frames on a test-bed implemented with Windows routers and performance related metrics are measured for both IPv4 and...
On the basis of interference model, the article puts forward a self-adapting routing strategy of Wireless Mesh Network, which can significantly improve the efficiency of the routing by choosing a minimum interference path. Due to regularly-distributed self-adapting adjustment and load balance, the routing can adapt to the dynamic network environment. The simulation shows that IBAR can significantly...
Since the IEEE 802.11 standard supports multiple data rates at the physical layer, many rate adaptation mechanisms have been proposed to utilize this multi-rate capability by dynamically switching rates in response to different channel conditions. In IEEE 802.11b networks, the guarantee of an equal transmission opportunity for all participating nodes results in performance anomaly. Traditional solutions...
This paper discusses the QoS topology control problem with consideration of power control and rate adaptation in wireless mesh networks. Our task is to construct a routing forest (a set of trees rooted from the gateway nodes), configure the transmission power of each node, such that the constructed network topology can meet the delivery threshold for all nodes and the system throughput is maximized...
Admission and rate control are key components for providing QoS (Quality of Service) flows in multi- rate wireless ad hoc networks where transmission rate at the physical layer is adapted dynamically according to the channel condition. Key to these controls is the formulation of a rate constraint that can regulate the flow rate passing through each node. This paper formulates a cross-layer rate constraint...
In this paper, a practical routing protocol that maximizes the guaranteed node traffic loads in reliable networks is designed and analyzed. The derived node traffic loads can be routed for every traffic pattern, and regardless of the possible single node or link failures. First, it is described how load balanced shortest path routing (LB-SPR) can be optimized to maximize the value of the guaranteed...
Wireless Sensor Networks (WSNs) have undergone tremendous technological advances over the last few years, and a broad range of ubiquitous computing applications have been enabled in the area of distributed sensing and control areas. To fully achieve the potentials of WSNs, designing a reliable and secure routing mechanism becomes critical. The intent of this work is to incorporate theories of trust...
This paper proposes a TDMA-based medium access control protocol with cooperative communications enabled in wireless mesh networks. The proposed scheme is based on a multi-hop scenario which is extended from the conventional one-hop triangle cooperative transmission scenario. Benefiting from the elaborate mini-slot design, channel resources are fairly and efficiently allocated to each router so that...
Reciprocity-based cooperation on packet relaying in mobile ad hoc networks discourages nodes from behaving selfishly. Before passing on a packet to the next hop a node verifies whether the sender of the packet is trustworthy (cooperative) or not. The quality of the evaluation of the trustworthiness relies on types of data used for description of the behaviour of the sender. In the literature a distinction...
The fat-tree topology has become a popular choice for InfiniBand fabrics due to its inherent deadlock freedom, fault-tolerance and full bisection bandwidth. InfiniBand is used by more than 40% of the systems on the latest Top 500 list, and many of these systems are based on a fat-tree topology. However, the current InfiniBand fat-tree routing algorithm suffers from flaws that reduce its scalability...
Podaj zakres dat dla filtrowania wyświetlonych wyników. Możesz podać datę początkową, końcową lub obie daty. Daty możesz wpisać ręcznie lub wybrać za pomocą kalendarza.