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.
Passive optical network (PON) has become the vital technology for the next generation access networks. The advancement of optical technology extends the span of the PON from 20 to 100 km. Such an extended PON is known as Long-Reach PON (LR-PON). But the data transmission in the existing LR-PONs suffer from longer propagation delays between the optical line terminal (OLT) and optical network units...
Network bandwidth and server capacity are gradually becoming overloaded due to high demand and rapid evolution of high quality multimedia services over the Internet. Internet Protocol Television (IPTV) is among the multimedia services that demand more of network and server resources, especially with the emergence of Mobile IPTV. It is imperative for service providers to maintain good quality management...
Nowadays, with the evolution of the mobile devices towards a multimode architecture, the users have the opportunity to utilize a wealth of services across a multitude of radio access technologies (RAT's). Variety of vertical handoff algorithms (VHA) have been proposed to help the user to select dynamically the best access network (BAN) in terms of quality of service. However, due to nature of VHA...
In the view of the large scale and increasing kinds of service of space information networks, a service- oriented topology control algorithm is proposed. According to demands of existing service, the topology of network is divided into several logical sub-topologies, on which construct the corresponding topology. Taking the communication pattern as an example, the augmentation-based approach is adopted...
Ant colony optimization (ACO) is a kind of new type heuristically optimizing algorithm, having ability to organize itself. In order to solve the problem that QoS routing faces while study at present, this paper proposes a new QoS routing algorithm based on an improved ACO which introduces a routing quality based parameter adaptive mechanism. Simulation results demonstrate that the algorithm has a...
Swarm intelligence inspired by the social behavior of ants boasts a number of attractive features, including adaptation, robustness, decentralized and self-organizing nature, which are well suited for routing in modern communication networks. This paper describes a new adaptive dynamic routing algorithm for packet-switched communications networks based on simple biological “ants” that explore the...
Active Queue Management (AQM) algorithm, as a typical router based congestion control strategy, has been the focus of researchers in the past few years and widely used in congestion control. There are a few drawbacks such as large queuing delay and queue jitter, which cause data retention drop and oscillation. It means that the existing AQM algorithms under high bandwidth can not meet the Quality...
In this paper we present a methodology for the design of congestion control protocols for background data transfers that have a minimal delay impact on short TCP transfers and compete for a target share of the leftover average capacity with other background TCP transfers. We analytically compute the optimal policy and show that it's delay performance can be well approximated by a weighted TCP policy,...
Service composition constructs composite applications with different services to fulfill numerous service requirements. Different users have various QoS demands for composite services. In this paper, we present a service composition model considering not only multiple QoS constraints but also load balance factors. Moreover, a service selection algorithm based on niching technique and particle swarm...
In this paper, a differentiated services based congestion control algorithm for Wireless Multimedia Sensor Networks (WMSNs) is proposed. Keeping in mind the characteristics of Wireless Sensor Networks (WSNs) and their possible extensions, the proposed algorithm categorizes WMSNs traffic into six different classes. The algorithm takes a novel and different approach towards congestion control in WMSNs...
Significant research has been carried out in the recent years for generating systems exhibiting intelligence for realizing optimized routing in networks. In this paper, a grade based two-level based node selection method along with Particle Swarm Optimization (PSO) technique is proposed. It assumes that the nodes are intelligent and there exist a knowledge base about the environment in their local...
MPLS networks use label technique for data transmission. For the rerouting mode, the backbone network demands short restoration time and the QoS guarantee. This paper proposes a new MPLS Fault Restoration Algorithm called NRRA based on Simulated Annealing and Tabu Search. When faults appears in the path, the algorithm can calculate a new optimal path with the new network state again, and the new path...
Multicast services are becoming more popular in the current network. As a result, the multicast routing algorithm which is load-balanced and minimum bandwidth resource will be more important since the bandwidth resource is seriously scarce and the network load is imbalance. To solve these problems, this paper proposes a dynamic multicast routing algorithm for minimum bandwidth cost and load-balanced...
Vertical handoff plays an important role in guaranteeing users to be always connected in an overlapped multi-network environment. During the vertical handoff procedure, handoff decision is the most important step that affects the normal working of communication. An incorrect handoff decision or selection of a non-optimal network may result in undesirable effects such as higher costs, poor quality...
Routing algorithm as a research core in the wireless mesh network, the design is good or bad is very important to network performance. In the field of ant colony optimization (ACO), models of collective intelligence of ants are transformed into useful optimization techniques that find applications in computer networking. Unbalanced traffic may lead to more delay, packet dropping, and decreasing packet...
A Wireless-Optical Broadband Access Network (WOBAN) is gaining more attention because its good performance and merits such as reliability, robustness and high capacity as well as flexibility. There are many factors that can affect the network performance, such as delay, packet loss and capacity utilization. In this paper, we proposed the Flow Limited and Risk Aware Routing Algorithm (FLRAR), which...
Space information networks promise encouraging prospects in areas of detection, communication and location. In this paper, node and link evaluation algorithms are proposed to provide reconfiguration basis for such networks. Given that space information networks operate in multi-application environments and offer diverse services, we take connectivity and availability into comprehensive consideration...
AFDX (Avionics Full Duplex Switched Ethernet) developed for the Airbus A380 represents a major upgrade in both bandwidth and capability, but guaranteed kinds of service presents challenges to system designers. Scheduling new classes of traffics with different priorities on the same AFDX network is urgently to resolve. However, there's no consideration of how buffer size influence the traffic performance...
Internet users are increasing with the advent of technology particularly voice over IP. Hence the amount of data carried by routers also increases sporadically. Congestion control still remains to be a critical issue. It is necessary to implement an effective queuing algorithm on the router that governs buffering of packets on transmission. In this paper, Adaptive Drop Tail Fuzzy Logic (ADT-FL) is...
This paper proposes a novel combination of ECN and BECN based on the value of the TTL, the hops that a packet has been passed since it was sent. Since the ECN and the BECN both have merits and disadvantages, the combination would be expected to enhance the performance and effectiveness of the congestion control. The TTL, a default attribute of a data packet transferring on networks, must be checked...
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.