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With the widely using of network-on-chip in VLSI systems, mapping has been one of the most critical and general problem in VLSI design and test. In this paper, a breadth-first greedy algorithm is proposed to reduce internal congestion and solve the application mapping with the structure of the task topology and the shape of the mapping area. The experimental results show our solution achieves the...
As a new computing paradigm, cloud computing has significantly contributed to the rapid development of massive data centers. However, the corresponding energy issue becomes increasingly challenging. In this paper, we focus on the energy saving issue for virtual machine (VM) selections on an overloaded host in a cloud computing environment. We analyze the energy influencing factors during a VM migration,...
A wireless sensor network (WSN) usually operates in an unreliable wireless environment with energy constraint. Many researchers are primarily interested in energy awareness and communication reliability of WSNs to maximize network lifetime. However, dealing with the conflicting problems of improving energy efficiency and fault-tolerance simultaneously is a challenging task. Most previous studies have...
We consider a class of prioritized Discrete Event Systems (DES) that involves the control of resources allocated to tasks under real-time constraints. This is motivated by power-limited wireless environments where the objective is to minimize energy consumption while guaranteeing that task deadlines are always met. We discover several structural properties of the optimal sample path of such DES. The...
In the paper, we propose a new d-hop Clustering method for a clustering-based multi-hop routing scheme in large-scale wireless sensor network. d-hop clustering means that each cluster contains all nodes that are at distance at most d-hops from the clusterhead, so that the number of clusters can be getting smaller to make it possible to guarantee the combined system performances including end-to-end...
This paper proposes a routing protocol for the applications of Wireless Sensor Network (WSN). It is a protocol based on the PEGASIS protocol but using an improved ant colony algorithm rather than the greedy algorithm to construct the chain. Compared with the original PEGASIS, this one, PEG-ant, can achieve a global optimization. It forms a chain that makes the path more even-distributed and the total...
In order to improve the real-time video transmission distortion performance over wireless video sensor network (WVSN), we propose a novel cooperative transmission scheme by using virtual multiple-input-multiple-output (MIMO) technology in this paper. The video transmission distortion, energy consumption and the end-to-end delay performance are analyzed with virtual MIMO transmission manner. According...
In the application of wireless sensor networks (WSN), the balance of energy consumption plays an important role in extending the life cycle of WSN. Aim at energy consumption of Wireless sensors network, a dynamic cluster-based routing protocol based on the greedy algorithm (GDCRP). In the protocol, nodes run for the cluster head according to the energy and location. The elected cluster head has optimal...
Service-oriented wireless sensor network (WSN) has been recently proposed as an architecture to rapidly develop applications in WSNs. In WSNs, a query task may require a set of services and may be carried out repetitively with a given frequency during its lifetime. A service composition solution shall be provided for each execution of such a persistent query task. Due to the energy saving strategy,...
This paper proposes a novel real-time dynamic voltage scheduling algorithm(GA-DVS) based on genetic algorithm for periodically real-time task set. Based on a mathematical system model in the real situation, the GA-DVS algorithm is different from classical DVS algorithms, some critical parts of which are specially designed, such as encoding, the fitness function, the crossover/mutation/repair operator...
Wireless sensor networks consist of a large number of sensor nodes with limited power and resource. To prolong network lifetime, the energy consumption must be somehow reduced. In this paper, we propose a localized density control algorithm for energy savings. The goals are to maintain a minimal number of active sensor nodes and to reduce radio-traffic intensity while conserving the sensing coverage...
Since the nodes of wireless sensor networks are in the condition of a highly-limited and unreplenishable energy resource such as battery power, computation, and storage space, the energy efficiency is the most important key- point of the network routing designing. In this paper, A novel routing algorithm which combines with hierarchical routing and geographical routing is proposed. Based on the hierarchical...
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