Jiangwei Huang

The dynamic power management for embedded system with Poisson process

The mass of the embedded systems are driven by second batteries, not by wired power supply. So saving energy is one of the main design goals for embedded system. In this paper we present a new technique for modelling and solving the dynamic power management (DPM) problem for embedded systems with complex behavioural characteristics. First we model a power-managed embedded computing system as a controllable Flow Chart. Then we use the Poisson process for optimisation, and give the power management algorithm by the help of Dynamic Voltage Scaling (DVS) technology. At last we built the experimental model using the PXA 255 Processors. The experimental results showed that the proposed technique can achieve more than 12% power saving compared to other existing DPM techniques.

Dynamic Compilation Framework with DVS for Reducing Energy Consumption in Embedded Processors

Dynamic voltage scaling (DVS) is an effective technique for reducing the energy consumption in embedded systems. There are several advantages using DVS technique into compiler framework. This paper present a framework for reducing energy consumption in embedded processors using the dynamic compiler collaborate with DVS technique. Two algorithms are implemented in this framework, and the framework is implemented using the Intel PIN systems and is deployed in a real hardware platform. Experimental results based on the software and hardware platform, show that significant energy saving are achieved while performance loss less than 5%.

Coordinating System Software for Power Savings

Power consumption is becoming a primary concern as a result of tremendous increasing in computer power usage. Innumerable methods and techniques have been exploited to address this problem but few concentrate on collaborative approaches. This paper presents coordination mechanisms that integrate operating systems with compilers under power reduction techniques such as DPM and DVS. By remaining the information generated at compile stage about an application¿s structure and performance characteristics as much as possible and committing it to system software at run stage, the system software, especially the operation system and compiler, are collaborating toward file-grain power optimizations. The proposed coordination mechanisms also make it possible to integrate the power optimization approaches in our prior work into a whole system. Thus, the optimizations working at distinct levels can be overlaid at run time, and the power reduction effect can be enhanced.

A new approach for predictable hard real-time transaction processing in embedded database

Real-time transaction processing becomes concerns as embedded time comes rapidly. However, the transaction process in real-time embedded system still has some problems in resource utilization at present. In this paper, a classification is designed to differentiate the hard periodic real-time transactions and hard sporadic real-time transactions. The new processing algorithm for hard sporadic real-time transactions is given. In time consuming and space consuming, this design and implementation indeed do a great deal of good.

CDP: component development platform for communication protocols

Complexity of software systems has significantly grown with social dependence on computer system, especially for mobile and internet. So we present component-based communication protocol architecture. In this architecture, Component Development Platform (CDP) is the kernel software. CDP is one of the rapid communication components’ development tools. It is the collection of views and plug-ins to form a series of tools and it takes much flexibility and configuration ability. For the customization of component-based communication protocols, code analysis tools make a good abstract from original practical source codes to visual structure model too. This becomes the feasible guidance and roadmap to develop the components and component-based communication protocols.

Component versioning for protocol configuration management

Classical software configuration management which deals with source code versioning becomes insufficient when most components are distributed in binary form. As an important aspect of software configuration, protocol configuration also encounters those problems. This paper focuses on solving protocol component versioning issues for protocol configuration management on embedded system, incorporating the following versioning issues: version identification, version description and protocol component archiving and retrieving based on the version library.

The modeling for dynamic power management of embedded systems

In this paper we present a new modeling technique using software engineering tool Flow Model for modeling and solving the Dynamic Power Management (DPM) with complex behavioral characteristics. Using this tool we can model the whole system easily. Experimental results show that the proposed technique can achieve more than 12% power saving compared to other DPM techniques.