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Dive into the research topics where Chin-Fu Kuo is active.

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Featured researches published by Chin-Fu Kuo.


embedded and real-time computing systems and applications | 2007

Energy-Efficient Scheduling for Real-Time Systems on Dynamic Voltage Scaling (DVS) Platforms

Jian-Jia Chen; Chin-Fu Kuo

Energy-efficient designs have played import roles for hardware and software implementations for a decade. With the advanced technology of VLSI circuit designs, energy-efficiency can be achieved by adopting the dynamic voltage scaling (DVS) technique. In this paper, we survey the studies for energy-efficient scheduling in real-time systems on DVS platforms to cover both theoretical and practical issues.


IEEE Transactions on Parallel and Distributed Systems | 2009

Dynamic Routing with Security Considerations

Chin-Fu Kuo; Ai-Chun Pang; Sheng-Kun Chan

Security has become one of the major issues for data communication over wired and wireless networks. Different from the past work on the designs of cryptography algorithms and system infrastructures, we aim at the proposing of a dynamic routing algorithm that could randomize delivery paths for data transmission. The algorithm is easy to implement and compatible with popular routing protocols, such as routing information protocol in wired networks and destination-sequenced distance vector protocol in wireless networks, without introducing extra control messages. An analytic study on the proposed algorithm is presented, and a series of simulation experiments are conducted to verify the analytic results and to show the capability of the proposed algorithm.


real-time systems symposium | 2000

Real-time digital signal processing of component-oriented phased array radars

Chin-Fu Kuo; Tei-Wei Kuo; Cheng Chang

With the advance of hardware and software technology, modern phased array radars are now built with commercial off-the-shelf (COTS) components, and it opens up a new era in real-time resource scheduling of digital signal processing. This paper targets the essential issues in building a component-oriented signal processor (SP), which is one of the two major modules in modern phased array radars. We propose a simple but effective task allocation policy and a real-time scheduling algorithm to address the design objectives of SPs. We are able to bound the number of processing units needed for a component-oriented SP in the design time, while everything was done empirically in the past. A series of experiments were done to demonstrate the strength of our methodology.


ieee radar conference | 2002

Real-time dwell scheduling of component-oriented phased array radars

Tei-Wei Kuo; Yung-Sheng Chao; Chin-Fu Kuo; Cheng Chang; Yu-Lin Su

A multi-function phased array radar must search and track suspicious targets in its surveillance space in a real-time fashion. This paper targets one of the most important issues in the design of modern phased array radars: real-time dwell scheduling. We propose a rate-based approach to schedule radar dwells in a real-time fashion. We show how to reserve radar resources to guarantee the minimum radar operation without sacrificing the stability of the system. The strength of our approach is verified by a series of simulation experiments based a real phased array radar for air defense frigates.


international conference on wireless communications and mobile computing | 2007

A fragment-based retransmission scheme with QoS considerations for wireless networks

Chin-Fu Kuo; Hsueh-Wen Tseng; Ai-Chun Pang

In order to satisfy QoS requirements for real-time multimedia applications over wireless networks, IEEE 802.11e has been proposed to enhance wireless-access functionalities. However, as system load is heavy, collisions occur most often and then the time needed for successfully transmitting data is lengthened seriously due to contention, handshaking, and long backoff processes for collision avoidance. It is important to keep QoS requirements satisfied. Therefore, we propose a fragment-based retransmission (FBR) scheme with QoS considerations for IEEE 802.11 wireless local area networks (WLAN). By utilizing IEEE 802.11e with FBR, the retransmission delay will be improved to conform strict time requirements for real-time multimedia applications. The capability of the proposed scheme is evaluated by a series of experiments, for which we have encouraging results.


ACM Sigapp Applied Computing Review | 2012

A novel key management scheme for wireless embedded systems

Yung-Feng Lu; Chin-Fu Kuo; Ai-Chun Pang

Wireless Embedded Systems (WEBs) has attracted significant interest in recent years, for instance, Wireless Sensor Networks (WSN), have recently been in the limelight for many domains. The characteristics of WEBs have imposed various restrictions on their system designs. Since embedded systems usually are developed by low-cost hardware, one major challenge in the development of many WEBs applications is to provide high-security features with limited resources. In this paper, we propose a novel key establishment scheme, named half-key scheme that based on the well-known random key pre-distribution scheme and DDHV-D deployment knowledge to provide resource-efficient key management in WEBs with reduced memory space requirements and better security enforcement. The capability of the proposed approach is evaluated by an analytical model and a series of experiments.


IEEE Transactions on Computers | 2003

Two-version based concurrency control and recovery in real-time client/server databases

Tei-Wei Kuo; Yuan-Ting Kao; Chin-Fu Kuo

While there has been a significant amount of research in real-time concurrency control, little work has been done in logging and recovery for real-time databases. This paper proposes a two-version approach which considers both real-time concurrency control and recovery. We propose a network-server-based architecture and algorithms which can not only reduce the blocking time of higher-priority transactions and improve the response time of client-side read-only transactions, but also provide a diskless runtime logging mechanism and an efficient and predictable recovery procedure. The performance of the algorithms was verified by a series of simulation experiments by comparing the algorithms with the well-known Priority Ceiling Protocol (PCP), the Read/Write PCP, the New PCP, and the 2-version two-phase locking protocol, for which we have very encouraging results. The schedulability of higher-priority transactions and the response time of client-side read-only transactions were all greatly improved.


international conference on algorithms and architectures for parallel processing | 2010

Real-time task scheduling on heterogeneous two-processor systems

Chin-Fu Kuo; Ying-Chi Hai

A heterogenous multiprocessor system is usually composed of one general purpose processor and one or more specific purpose computing component. While heterogenous multiprocessor system becomes more popular, more and more researches pay lots of attention to this domain. In such a system, tasks often need to be processed at multiple different functional processing units. Therefore a task is usually divided into several subtasks according to its execution requirement, each of which is executed at particular processing unit with precedence constraints. In this paper, we present an EDF-based algorithm to schedule the tasks in the heterogenous multiprocessor system and propose the scheduability analysis. A series of simulation experiments are conducted to verify the analytic results and to show the capability of the proposed algorithm.


ACM Sigapp Applied Computing Review | 2013

Robust and flexible tunnel management for secure private cloud

Yung-Feng Lu; Chin-Fu Kuo

Private cloud is cloud infrastructure operated solely for a single organization, whether managed internally or by a third-party and hosted internally or externally. It provides a flexible way to extend the working environment. Since the business process that working on them could be critical, it is important to provide a secure environment for organizations to execute those processes. While user mobility has become an important feature for many systems, technologies that provide users a lower cost and flexible way in joining a secure private cloud are in a strong demand. This paper exploits the key management mechanisms to have secured tunnels with private cloud for users who might move around dynamically without carrying the same machine. A strong authentication with a key agreement scheme is proposed to establish the secure tunnel. Furthermore, the proposed framework also provides mutual authentication, session key renewal between the users and the cloud server. Several related security properties of the proposed mechanism are also presented.


research in adaptive and convergent systems | 2013

Scheduling algorithm with energy-response trade-off considerations for mixed task sets

Chin-Fu Kuo; Lieng-Cheng Chien; Yung-Feng Lu

This paper aims to investigate the scheduling problem of a mixed task set consisting of periodic tasks and aperiodic jobs in a real-time system. When a mixed task set is executed, a scheduling algorithm has to consider not only the system energy consumption but also the response time of the aperiodic jobs which do not want to be prolonged seriously. This paper proposes the Ratio Reclaim Algorithm (RRA) that reclaims the unused execution time for periodic jobs based on a user-defined ratio. For the convenience of maintaining effectively unused execution time left by early completed jobs, the earliness-queue is presented to reduce the memory space that the earliness-queue occupies. A series of experiments are conducted to evaluate the proposed algorithm. The experimental results demonstrate that the RRA scheme with a suitable user-defined value has a better performance than the compared scheme.

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Dive into the Chin-Fu Kuo's collaboration.

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Yung-Feng Lu

National Taichung University of Science and Technology

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Tei-Wei Kuo

National Taiwan University

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Ai-Chun Pang

National Taiwan University

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Hsueh-Wen Tseng

National Chung Hsing University

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Cheng Chang

National Taiwan University

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Bao-Rong Chang

National University of Kaohsiung

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Ya-Shu Chen

National Taiwan University of Science and Technology

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Chi-Sheng Shih

National Taiwan University

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Jhong-Syuan Li

National Taichung University of Science and Technology

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Jun Wu

National Pingtung Institute of Commerce

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