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MapReduce is a state-of-the-art computation paradigm that is becoming widely used for processing large-scale datasets. Hadoop is an open-source implementation of MapReduce and follows a masterCslave architecture. This architecture makes Hadoop suffer from a single point of failure in the JobTracker. In this paper, we design a solution to resolve the single point of failure of the Job Tracker and then...
Based on IEEE 802.15.4, a contention-free period (CFP) adopts guarantee time slot (GTS) mechanism to ensure each device can access the radio channel. However, it is hard to get the authority to access the radio channel due to more competitors access the radio channel simultaneously. To cope with this issue, we proposed a guarantee time slot mechanism to enhance the performance and utilization of using...
Dual threshold voltage (dual-Vth) assignment is recognized as a useful technique to reduce the leakage power. However, as the process technology shrinks to the deep sub-micron regime, the negative bias temperature instability (NBTI) effect becomes a serious concern. The NBTI effect may cause the degradation of threshold voltage over a period of months or years. Since previous dual-Vth assignment techniques...
At present, Machine-to-Machine (M2M) communication have become new services with large market potential, and show quite different characters compared with the traditional Human-to-Human (H2H) communications. It is a big challenge to guarantee the Quality of Service (QoS) for M2M services in traditional telecomm. network. This paper focuses on the QoS categorization of M2M services. Based on the analysis...
A constantly increasing number of resource demanding applications from various scientific sectors are finding their way towards adopting Grid technologies in order to take advantage of their computational power. The aim of this paper is to demonstrate how tasks of large-scale distributed simulation can be scheduled based on GA in a Grid environment by taking into account load of computing nodes, network...
This work proposes process/resistance variation-insensitive read schemes for embedded RRAM to achieve fast read speeds with high yields. An embedded mega-bit scale (4Mb), single-level-cell (SLC) RRAM macro with sub-8ns read-write random access time is presented. Multi-level-cell (MLC) operation with 160ns write-verify operation is demonstrated.
This paper considers the problem of delay-dependent robust stability for singularly perturbed systems with state delays. Some new delay-dependent stability criteria are derived by employing appropriate Lyapunov-Krasovskii functional. Since some free weighting matrices are used to express the relationship between the terms in the Leibniz-Newton formula, the new criteria are less conservative than existing...
Allusion to the various different requirements QoS's quota such as delay sensitivity of multi-medium business for Multi-media communication in Heterogeneous wireless network, we put forward the attemper arithmetic of classify queue based on multi-medium communication. Grade the now operation according to the factors of flux, delay and error tolerance etc, and the node that participates transmission...
This paper presents a control method based on multi-agent for traffic signals. A reinforcement learning algorithm is used to optimize traffic flow in the intersection. The genetic algorithm intends to introduce a global optimization criterion to each of the local learning processes that optimize the cycle of traffic signals and green-ratio. Area-wide coordination is achieved by game theory. We combine...
Network monitor system generally adopts packets interception, protocol analysis, address filter, and address cheat etc. to achieve its functions. These methods need extra time in the process of normal data transmission, which could affect the network performance especially under the condition of busy network and the low performance of the monitor server. The users will not accept the drawback that...
Since sink nodes can be recharged in many applications, the neighbors of sink nodes will play a key role on deciding the network lifetime. Current algorithms for multi-sink wireless sensor networks only consider the load-balance among sink nodes. To balance the loads among the neighbors of sink nodes and prolong the network lifetime, we presented a multi-sink and load-balance routing algorithm (MSLBR):...
A multimetric QoS routing protocol (MQOLSR) is proposed in this paper, which providing different QoS for different applications flow in an ad hoc network. The protocol, which integrates QoS measurement and packet forwarding, expands the topology discovery and routing computing mechanism of the OLSR protocol. It can provide different routing and forwarding service according to different application...
Congestion is one of the most important restrictions of wireless ad hoc networks. Most of the existing ad hoc routing protocols take no account of the congestion factor. It results in long delay, high overhead and low throughput. These problems are solved by the congestion-aware routing protocols in certain degree. In this paper, we study the congestion metrics and route mechanisms of three congestion-aware...
This paper proposes a hybrid simulation approach for ad hoc network based on NS-2 emulation, which can provide the ability for real-world traffic to interact with a simulation. By adjusting hybrid network parameters according to the real network, we analyze the effect of different parameter settings in various experiments and compare the results with measurements in a real network. The results show...
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