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In WiMAX architecture to avoid congestion at the base station, a mechanism namely WiMAX Fair Intelligent Congestion Control (WFICC) was proposed in [11]. WFICC ensures that the traffic is scheduled in such a way that the base station output buffer operates around a target operating point, without violating the Quality of Service (QoS) requirements of connections. However, only preliminary results...
Most wireless sensor networks operate with very limited energy sources-their batteries, and hence their usefulness in real life applications is severely constrained. The challenging issues are how to optimize the use of their energy or to harvest their own energy in order to lengthen their lives for wider classes of application. Tackling these important issues requires a robust architecture that takes...
A component based hybrid embedded framework for mobile robot is presented in this paper. There are 3 layers in this framework, data layer, real-time layer, and high performance layer. The hardware consists of a hybrid architecture of Advanced RISC Machine (ARM) architecture micro controller and Field Programmable Gate Array (FPGA) with high-speed parallel/serial bus. The software mainly includes a...
In this paper, we use statistical tools to analysis dependency between Wireless Sensor Network (WSN) parameters and overall Energy Consumption (EC). Our approach has two key steps: profiling, and effective parameter extraction. In former step, a sensor network simulator is re-run 800 times with different values of the WSN parameters to profile the average residual energy in nodes. In latter step,...
This paper presents a LBS middleware software, which contains application and positioning modules. The first module is designed to improve the granularity of the pushed information in current LBS systems and to conveniently add new applications. Taking the advantage of PUB/SUB system's asynchronous, loosely-coupled and multiplex communication mechanism, the middleware pushes LBS information with its...
As multi-core/many-core becomes the trend of processor architecture, conflict in shared cache has become more and more serious that restricts performance improvement of parallel program. Recent research has employed page coloring mechanism to realizing cache partitioning on real system for the purpose of decline shared cache conflict. However, page coloring-based cache partitioning has some side-effects,...
Speculative multithreading (SpMT) is a thread level automatic parallelization technique to accelerate sequential programs. Since approaches based on heuristic rules only get the local optimal speculative thread solution and have reached their speedup performance limit, machine learning approaches have been introduced into speculative multithreading to avoid the shortcomings of the heuristic rules...
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