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In real-time multicast, delay and inter-destination delay variation of group members are bounded above by a value. The problem is known as Delay and Delay Variation Bounded Multicast Tree (DVBMT), which is proven to be NP-complete. In this paper, we propose a directional approach (DCS) for core selection and tree generation satisfying delay and inter-destination delay variation constraints. After...
This article considers the problem of constructing an adaptive control system for nonlinear priori uncertain dynamic object with statement delay and relative order greater than one. As methods of solving the hyperstability criterion and high-speed self-tuning correction unit are used.
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...
Load balancing and delay optimizing play significant roles in improving network performance. However, in the current networks, only local load balance (LB) and mean delay optimization mechanisms are adopted, which ignore the jitter and the network's status. In this paper, a dynamic LB algorithm is proposed to optimize the network delay with a global view (LBGV). It makes a traffic distribution decision...
Wireless Sensor Network (WSN) is a collection of large number of sensors with low-power transceivers effectively used for collecting data in various applications like environmental monitoring, healthcare, civil and military applications. Efficient data transmission protocols are required to reduce transmission delay and energy of sensors to increase lifetime of sensor nodes. Recent researches in WSNs...
Delay and capacity (throughput) are two important parameters to route data packets in Mobile Ad Hoc Networks (MANETs). In this paper, a new connectionless routing algorithm has been proposed to overcome the performance limit. The proposed algorithm is an extension of dynamic virtual route (DVR) algorithm. Mobility degree of nodes' neighborhood is used to calculate two mobility metrics. Mobility metrics...
Ethernet Passive Optical Network (EPON) is one of the most promising technologies for FTTX deployed by service providers at the access network. Dynamic Bandwidth Allocation (DBA) for the upstream traffic can help optimize the network bandwidth utilization. This paper discusses a centralized DBA called as Universal DBA (UDBA) algorithm that supports quality of service (QoS) of the upstream traffic...
The paper describes a service model for cost-effective event reporting to clients over a wide-area network. The service provider (SP) maintains multiple protocol mechanisms to replicate the event pages at different proxy nodes of the distribution network. The mechanisms, which embody server-driven and client-driven replica update schemes to synchronize the page copies, reduce the access latency on...
Data centers are used to host computation-intensive distributed applications. Since all the applications are distributed in nature, their performance is significantly affected by the communication network. These applications generally create two kinds of flows: large data flows that require high throughput and small control flows that require low delay. These two contradictory requirements are not...
A variety of interesting problems arise in the study of finite automata that move about in a two dimensional space. The model proposed by H. Muller [4] is used here to construct new automaton which can explore any labyrinth and escape through the moving or dynamic obstacles inside over the grid. The earlier results were shown for static obstacles distributed over integer grid and the automaton in...
This paper addresses the output consensus problem of heterogeneous multi-agent systems. Specifically, we propose consensus algorithms that account for input saturations using only the available output measurements. Our approach takes roots from a simple design procedure built around ideal first order consensus schemes (full state availability and no input saturations) and extends to the more challenging...
The smart grid is envisioned to significantly enhance the efficiency of energy consumption, by utilizing two-way communication channels between consumers and operators. For example, operators can opportunistically leverage the delay tolerance of energy demands in order to balance the energy load over time, and hence, reduce the total operational cost. This opportunity, however, comes with security...
This paper considers a class of generalized convex games where each player is associated with a convex objective function, a private convex inequality constraint and a private convex constraint set. The component functions are potentially non-smooth. The players aim to compute a Nash equilibrium through communicating with neighboring players. We study two distributed computation algorithms and show...
Several approaches for fault-tolerance in distributed systems were introduced; however, they require prior knowledge of the environment's operating conditions and/or constant monitoring of these conditions at run time. That allows the applications to adjust the load and redistribute the tasks when failures occur. These techniques work well when there is no high communication delay. Yet, this is not...
With the miniaturization of LSIs and its increasing performance, demand for high-functional portable devices has grown significantly. At the same time, the problems for battery runtime and device overheating have occurred. On the other hand, the ratio of an interconnection delay to a gate delay has continued to increase as device feature size decreases. We have to estimate the interconnection delay...
With the development of wireless communication technologies, future networks will most likely be heterogeneous, consist of both wired and wireless links. However, current active queue management (AQM) schemes, which are originally designed for wired networks, could cause performance degradation of Transmission Control Protocol (TCP) flows over wired-cum-wireless networks. Thus, to deal with these...
Due to the progress of network multimedia technology, a majority of real-time multimedia applications need multicast communication to transmit information. These applications require a multicast routing protocol in which packets arrive to multicast receptors within a specified QOS guaranteed. D2V-RPS's problem (delay and delay variation RP Selection) consists in choosing an optimal multicast router...
Large-scale applications expressed as scientific workflows are often grouped into ensembles of inter-related workflows. In this paper, we address a new and important problem concerning the efficient management of such ensembles under budget and deadline constraints on Infrastructure- as-aService (IaaS) clouds. We discuss, develop, and assess algorithms based on static and dynamic strategies for both...
In this paper we propose a novel, efficient and practical load balancing algorithm named DEPRO for homogeneous distributed environments. The proposal is presented as a framework based on the layers programming paradigm. The main purpose of the algorithm is the solution of the load balancing distribution problem in systems highly congested by clients. The proposal is compared with the well-known Even...
For the low delay requirements of Ad Hoc networks in high traffic-load, it mentioned an improved algorithm named Slotted ALOHA based on Multichannel Statistics (SAMS) . Compared to the widely used protocol of ALOHA, Slotted ALOHA, CSMA and TDMA, the result of SAMS simulation proved it can maintain very low delay of ensuring the high-priority data send successfully in high traffic-load.
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