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The aim of topology-transparent scheduling algorithms for multi-hop wireless networks is to find a schedule for the nodes that does not need re-computation when the network topology changes. It caters to highly dynamic scenarios where topology changes occur faster than the speed at which schedule updates can be orchestrated. These algorithms normally take as input only global network parameters like...
Data aggregation is a key, yet time-consuming functionality introduced to conserve energy in wireless sensor networks (WSNs). In this paper, to minimize time latency, we focus on aggregation scheduling problem and propose an efficient distributed algorithm that generates a collision-free schedule with the least number of time slots. In contrast to others, our approach named FAST mainly contributes...
In this paper, we design an architecture to implement a QoS system based on OpenFlow. The system can filter malicious packets that have no permission to gain quality of service, and can guarantee scheduling the fastest path for QoS packets in working network. By predicting and estimating current network flows, we implement to assign optimal path for QoS flow without affecting the rest of the normal...
Topology control based Duty-Cycling is an efficiency approach that can enhance the sensor network lifetime. In this paper, we propose a Group-based Scheduling Protocol (GSP) for wireless sensor networks which exploits the network density and divides the nodes into groups and only one node in each group remains active. GSP identifies equivalent nodes in terms of communication with a low communication...
The growing demand for mobile wireless access has stimulated the emergence of new communication technologies. Opportunistic Spectrum Access (OSA) is viewed as a promising alternative to overcome the problems caused by static spectrum assignment. Opportunistic access allows dynamic mapping of the transmission needs and communication opportunities. However, performing this task efficiently is not trivial...
In order to use the available capacity of OFDM/TDMA wireless mesh networks as efficiently as possible, the maximum number of simultaneous transmissions must be scheduled in such a way that collisions are avoided. In order to achieve this goal, we introduce a scheduling algorithm that assigns both time slots and channels to wireless transmission links in a conflict free manner. For the scheduling of...
This paper proposes an extension to the current IEEE802.15.4 standard in which flexible mesh networking in the low power beacon mode is enabled through the use of a distributed duty cycle management (DDCM) strategy in conjunction with a distributed time beacon scheduling (DTBS) technique. The DTBS technique enables a beacon enabled coordinator to calculate its time schedule to transmit beacons, thus...
This paper introduces the concept of switched FlexRay networks and proposes two algorithms to schedule data communication for this new type of network. Switched FlexRay networks use an intelligent star coupler, called a switch, to temporarily decouple network branches, thereby increasing the effective network bandwidth. Although scheduling for basic FlexRay networks is not new, prior work in this...
Grid computing aims at offering standardized access to heterogeneous and distributed resources for scientific communities. However, in order to support emerging next generation Grid applications with specific Quality of Service requirements, the interconnecting networks have also been considered as first-class allocable Grid resources and have been also taken into account for the co-scheduling process...
Wireless Personal Area Networks (WPANs) are used for a wide variety of applications. Earlier WPANs, like Bluetooth, offer data rates only for low rate communication. Nowadays, consumer electronic devices have high demands on communication systems, e.g. for high definition video transmission. Users expect future WPANs to act like wired systems by means of reliability, that is, packet loss and distortion...
This paper, presents a learning automata based algorithm (LABTA) to determine an appropriate time interval for topology control, while capturing network updates and minimizing algorithm overhead. This algorithm is application dependent and it is possible to consider other parameters like delay, etc. In this paper, we describe how to merge parameters and compute the fitness. We have implemented the...
Recently, several scheduling techniques to enable multihop communications in the beacon enabled mode of the IEEE 802.15.4 standard have been proposed. Using the beacon enabled mode allows node synchronization and hence energy savings which is an important concern in wireless sensor networks (WSNs). However, and to the best of our knowledge, current available scheduling techniques have not been formally...
The Controller Area Network (CAN) protocol is widely employed in the development of distributed embedded systems. Building on the CAN protocol, previous studies have illustrated how “Shared-Clock” (S-C) algorithms can be used in conjunction with off-the-shelf microcontrollers to create high-reliability distributed systems at low cost. In such studies, it has generally been assumed that S-C designs...
The focus of this paper is on interaction protocols and topologies of multi-agent systems for task allocation in manufacturing applications. Resource agents in manufacturing are members of a network whose possible logical topologies and governing interaction protocol influence the scheduling and control in the multi-agent system. Four models are identified in the paper, each having specific rules...
In this paper, we consider an amplify-and-forward cooperative network composed of N nodes. Here we focus on the scheduling problem which consists in assigning the roles {source, relay} to the N nodes. Our target is to investigate and develop relay selection policies that can be used in amplify-and-forward cooperative systems. For fairness and simplicity issues, we assume that a node is chosen as a...
Wireless Mesh Networks (WMNs) with chain topologies are very useful in road and railroad transportation or in tunnel and mine applications. The proposed protocols for WMNs usually support best-effort traffic or some kind of Quality of Service (QoS). However, some applications such as remote-controlled machines in industrial control networks have Hard Real-Time (HRT) requirements, i.e., strict deadlines...
Topology control is one of the fundamental problems in WSNs (wireless sensor networks). It is of great importance for prolong lifetime, reducing radio interference, for prolong lifetime, increasing the efficiency of MAC (media access control) protocols and routing protocols, ensure the quality of connectivity and coverage, increasing the network service and so on. In this survey paper, different network...
Concurrent on-line testing (COLT) of many-core systems-on-chip (SoC) has been recently proposed by researchers in response to the growing threat of electronic wear-out to system operational lifetimes and to the increasing reliability and availability demands of safety-critical applications. Previous research in concurrent on-line testing has focused on centralized approaches to manage core testing...
Peer-to-peer (P2P) technology has become as a promising scalable solution to offer high-quality streaming multimedia to a large number of consumers at reasonable cost. Many existing systems have been deployed based on IPv4 network environment [1], [2]. IPv6 protocol has been seemed as a core component in Next Generation Internet (NGI) and the P2P streaming scheme which can be implemented in a IPv4...
TDMA-based MAC protocols are considered an energy efficient solution to prolong wireless sensor network lifetime. The topology learning and collection process, together with the used scheduling scheme, are essential parts in the design of such MAC protocols. Previous MAC and multihop scheduling protocols rely completely on CSMA to exchange topology scheduling information. However, for large or dense...
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