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353 results on '"Son, Sang H."'

1. A Graph Theoretic Characterization of Perfect Attackability and Detection in Distributed Control Systems

Author

Weerakkody, Sean, Liu, Xiaofei, Son, Sang H., and Sinopoli, Bruno

Subjects
Computer Science - Systems and Control
Abstract

This paper is concerned with the analysis and design of secure Distributed Control Systems in the face of integrity attacks on sensors and controllers by external attackers or insiders. In general a DCS consists of many heterogenous components and agents including sensors, actuators, controllers. Due to its distributed nature, some agents may start misbehaving to disrupt the system. This paper first reviews necessary and sufficient conditions for deterministic detection of integrity attacks carried out by any number of malicious agents, based on the concept of left invertibility of structural control systems. It then develops a notion equivalent to structural left invertibility in terms of vertex separators of a graph. This tool is then leveraged to design minimal communication networks for DCSs, which ensure that an adversary cannot generate undetectable attacks. Numerical examples are included to illustrate these results., Comment: 8 pages, 1 figure

Published
2015

2. An Efficient Cluster-Based Data Sharing Algorithm for Bidirectional Road Scenario in Vehicular Ad-hoc Networks

Author

Wang, Junhua, Liu, Kai, Sha, Edwin H. M., Lee, Victor C. S., Son, Sang H., Hutchison, David, Series editor, Kanade, Takeo, Series editor, Kittler, Josef, Series editor, Kleinberg, Jon M., Series editor, Mattern, Friedemann, Series editor, Mitchell, John C., Series editor, Naor, Moni, Series editor, Pandu Rangan, C., Series editor, Steffen, Bernhard, Series editor, Terzopoulos, Demetri, Series editor, Tygar, Doug, Series editor, Weikum, Gerhard, Series editor, Wang, Guojun, editor, Zomaya, Albert, editor, Martinez, Gregorio, editor, and Li, Kenli, editor

Published
2015
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4. Event Detection in Wireless Sensor Networks – Can Fuzzy Values Be Accurate?

Author

Kapitanova, Krasimira, Son, Sang H., Kang, Kyoung-Don, Akan, Ozgur, Series editor, Bellavista, Paolo, Series editor, Cao, Jiannong, Series editor, Dressler, Falko, Series editor, Ferrari, Domenico, Series editor, Gerla, Mario, Series editor, Kobayashi, Hisashi, Series editor, Palazzo, Sergio, Series editor, Sahni, Sartaj, Series editor, Shen, Xuemin (Sherman), Series editor, Stan, Mircea, Series editor, Xiaohua, Jia, Series editor, Zomaya, Albert, Series editor, Coulson, Geoffrey, Series editor, Zheng, Jun, editor, Simplot-Ryl, David, editor, and Leung, Victor C. M., editor

Published
2010
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11. Data Services in Distributed Real-Time Embedded Systems

Author

Kang, Woochul, Son, Sang H., Hutchison, David, Series editor, Kanade, Takeo, Series editor, Kittler, Josef, Series editor, Kleinberg, Jon M., Series editor, Mattern, Friedemann, Series editor, Mitchell, John C., Series editor, Naor, Moni, Series editor, Nierstrasz, Oscar, Series editor, Pandu Rangan, C., Series editor, Steffen, Bernhard, Series editor, Sudan, Madhu, Series editor, Terzopoulos, Demetri, Series editor, Tygar, Doug, Series editor, Vardi, Moshe Y., Series editor, Weikum, Gerhard, Series editor, Brinkschulte, Uwe, editor, Givargis, Tony, editor, and Russo, Stefano, editor

Published
2008
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12. On Using Temporal Consistency for Parallel Execution of Real-Time Queries in Wireless Sensor Systems

Author

Lam, Kam-Yiu, Pang, Henry C. W., Son, Sang H., Liang, BiYu, Hutchison, David, editor, Kanade, Takeo, editor, Kittler, Josef, editor, Kleinberg, Jon M., editor, Mattern, Friedemann, editor, Mitchell, John C., editor, Naor, Moni, editor, Nierstrasz, Oscar, editor, Pandu Rangan, C., editor, Steffen, Bernhard, editor, Sudan, Madhu, editor, Terzopoulos, Demetri, editor, Tygar, Dough, editor, Vardi, Moshe Y., editor, Weikum, Gerhard, editor, Cao, Jiannong, editor, Yang, Laurence T., editor, Guo, Minyi, editor, and Lau, Francis, editor

Published
2005
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13. Reliable Data Aggregation for Real-Time Queries in Wireless Sensor Systems

Author

Lam, Kam-Yiu, Pang, Henry C. W., Son, Sang H., Liang, BiYu, Hutchison, David, Series editor, Kanade, Takeo, Series editor, Kittler, Josef, Series editor, Kleinberg, Jon M., Series editor, Mattern, Friedemann, Series editor, Mitchell, John C., Series editor, Naor, Moni, Series editor, Nierstrasz, Oscar, Series editor, Pandu Rangan, C., Series editor, Steffen, Bernhard, Series editor, Sudan, Madhu, Series editor, Terzopoulos, Demetri, Series editor, Tygar, Dough, Series editor, Vardi, Moshe Y., Series editor, Weikum, Gerhard, Series editor, Jin, Hai, editor, Gao, Guang R., editor, Xu, Zhiwei, editor, and Chen, Hao, editor

Published
2004
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48. Managing deadline miss ratio and sensor data freshness in real-time databases

Author

Kang, Kyoung-Don, Son, Sang H., and Stankovic, John A.

Subjects
Sensors, Electronic data processing, Databases, Database, CD-ROM database, CD-ROM catalog, Business, Computers, Electronics, Electronics and electrical industries
Abstract

The demand for real-time data services is increasing in many applications including e-commerce, agile manufacturing, and telecommunications network management. In these applications, it is desirable to execute transactions within their deadlines, i.e., before the real-world status changes, using fresh (temporally consistent) data. However, meeting these fundamental requirements is challenging due to dynamic workloads and data access patterns in these applications. Further, transaction timeliness and data freshness requirements may conflict. In this paper, we define average/transient deadline miss ratio and new data freshness metrics to let a database administrator specify the desired quality of real-time data services for a specific application. We also present a novel QoS management architecture for real-time databases to support the desired QoS even in the presence of unpredictable workloads and access patterns. To prevent overload and support the desired QoS, the presented architecture applies feedback control, admission control, and flexible freshness management schemes. A simulation study shows that our QoS-aware approach can achieve a near zero miss ratio and perfect freshness, meeting basic requirements for real-time transaction processing. In contrast, baseline approaches fail to support the desired miss ratio and/or freshness in the presence of unpredictable workloads and data access patterns. Index Terms--Real-time database, deadline miss ratio, sensor data freshness, QoS management.

Published
2004

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