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Displaying 1-24 out of 24 total
Bounding End-to-End Delay for Real-Time Environmental Monitoring in Avionic Systems
Found in: 2013 Workshops of International Conference on Advanced Information Networking and Applications (WAINA)
By Daeha Jin,Junhee Ryu,Juyoung Park,Jaemyoun Lee,Heonshik Shin,Kyungtae Kang
Issue Date:March 2013
pp. 132-137
Timing guarantees and predictive early analysis are essential considerations for the design of reliable and verified real-time avionics systems. In this paper, we consider an environmental monitoring avionic system, which allows physical circumstances to b...
 
Evaluating QoS of a Wireless System for Real-Time Cardiac Monitoring
Found in: 2013 IEEE 27th International Conference on Advanced Information Networking and Applications (AINA)
By Juyoung Park,Jaemyoun Lee,Junhee Ryu,Heonshik Shin,Shin Heu,Kyungtae Kang
Issue Date:March 2013
pp. 1105-1112
Quality of service (QoS), and in particular reliability and low latency, are essential qualities of safety-critical wireless systems for medical applications. However, wireless links are typically prone to bursts of errors, with characteristics which vary ...
 
Model-Based Analysis of Wireless System Architectures for Real-Time Applications
Found in: IEEE Transactions on Mobile Computing
By Kyungtae Kang, Min-Young Nam, Lui Sha
Issue Date:February 2013
pp. 219-232
We propose a model-based description and analysis framework for the design of wireless system architectures. Its aim is to address the shortcomings of existing approaches to system verification and the tracking of anomalies in safety-critical wireless syst...
 
Model-based design of a wireless telemetry system and QoS assessment using AADL
Found in: 2012 IEEE International Conference on Bioinformatics and Biomedicine Workshops (BIBMW)
By Kyungtae Kang,Min-Young Nam,Jaemyoun Lee,Juyoung Park,Homin Yoo,Lui Sha
Issue Date:October 2012
pp. 748-749
High reliability and acceptable latency are major quality-of-service (QoS) considerations in the design of wireless telemetry systems. In this paper, we show how to analyze the QoS of the wireless telemetry system using its formal description written in th...
 
Extending Service Coverage Using FGS-Aware Blind Repetition
Found in: 2012 15th International Conference on Network-Based Information Systems (NBiS)
By Juyoung Park,Jaemyoun Lee,Junbeom Hur,Kyungtae Kang
Issue Date:September 2012
pp. 180-186
Frequent bursts of errors are an unavoidable characteristic of the reception at mobile devices, but one which must be dealt with effectively in the provision of broadcast transmissions. The third generation partnership project 2 (3GPP2) broadcast and multi...
 
Link-level reliability control for wireless electrocardiogram monitoring in indoor hospital
Found in: 2012 IEEE Symposium on Computers and Communications (ISCC)
By Juyoung Park,Jaemyoun Lee,Kyungtae Kang
Issue Date:July 2012
pp. 000596-000599
Reliability is an essential quality of safety-critical wireless systems for medical applications. However, wireless links are typically prone to bursts of errors, with characteristics which vary over time. We propose a wireless system suitable for realtime...
   
Limiting Worst-Case End-to-End Latency When Traffic Increases in a Switched Avionics Network
Found in: Real-Time Computing Systems and Applications, International Workshop on
By Min-Young Nam,Eunsoo Seo,Lui Sha,Kyung-Joon Park,Kyungtae Kang
Issue Date:August 2011
pp. 285-294
New features are often added incrementally to avionics systems. This avoids redesign and recertification but still requires verifying the timing constraints of both new and existing applications. We introduce a new switch that facilitates this verification...
 
Differentiated Protection of Video Layers to Improve Perceived Quality
Found in: IEEE Transactions on Mobile Computing
By Kyungtae Kang,Won J. Jeon
Issue Date:February 2012
pp. 292-304
Scalable video transmission over a network is easily adaptable to different types of mobile experiencing different network conditions. However the transmission of differentiated video packets in an error-prone wireless environment remains problematic. We p...
 
Cross-Layer Quality Assessment of Scalable Video Services on Mobile Embedded Systems
Found in: IEEE Transactions on Mobile Computing
By Kyungtae Kang, Won J. Jeon, Kyung-Joon Park, Roy H. Campbell, Klara Nahrstedt
Issue Date:October 2010
pp. 1478-1490
The recent development of high-speed data transmission over wireless cellular networks has enabled the delivery of multimedia broadcasting services to mobile users. These services involve a range of interactions among different system components, including...
 
An Interleaving Structure for Guaranteed QoS in Real-Time Broadcasting Systems
Found in: IEEE Transactions on Computers
By Kyungtae Kang, Lui Sha
Issue Date:May 2010
pp. 666-678
Providing high-quality broadcast services for soft real-time applications over wireless networks such as CDMA2000, which have high bit error rates, requires the control of errors that occur during data transmission. Reed-Solomon (RS) forward error correcti...
 
A Practical Flow Control Scheme Considering Optimal Energy Allocation in Solar-Powered WSNs
Found in: Computer Communications and Networks, International Conference on
By Dong Kun Noh, Kyungtae Kang
Issue Date:August 2009
pp. 1-6
No summary available.
 
Stochastic Timing Analysis of the AES Cipher Algorithm over a Correlated Fading Channel
Found in: Computer Communications and Networks, International Conference on
By Kyungtae Kang, Dong Kun Noh
Issue Date:August 2009
pp. 1-6
No summary available.
 
Simulation Framework and Performance Analysis of Multimedia Broadcasting Service over Wireless Networks
Found in: Distributed Computing Systems, International Conference on
By Won J. Jeon, Kyungtae Kang, Roy H. Campbell, Klara Nahrstedt
Issue Date:June 2009
pp. 93-100
The recent development of high-speed data transmission over wireless networks enables multimedia broadcasting service to mobile users. Multimedia broadcasting service involves interactions among different system and network components, so it is crucial for...
 
Efficient Error Recovery for Multimedia Data Transmission over 3G Cellular Broadcast Networks
Found in: Advanced Information Networking and Applications, International Conference on
By Joonho Lee, Kyungtae Kang, Yongwoo Cho, Junu Kim, Heonshik Shin
Issue Date:April 2006
pp. 683-688
We analyze the execution time of MAC-layer Reed- Solomon decoding in cdma2000 1xEV-DO broadcast and multicast services (BCMCS), using different cache sizes and a simulated air channel. MPEG-4 video is widely used for wireless multimedia services; however, ...
 
Improving MAC-layer Error Recovery for 3G Cellular Broadcasts
Found in: Advanced Information Networking and Applications, International Conference on
By Yongwoo Cho, Kyungtae Kang, Yongjin Cho, Heonshik Shin
Issue Date:April 2006
pp. 418-422
The error-prone nature of the radio channel is the major challenge in servicing video streams over cdma2000 1xEVDO broadcast networks. Forward error correction is commonly used when broadcasting a video stream over a lossy network: in BCMCS, the MAC protoc...
 
Proactive Reed-Solomon Bypasss (PRSB): A Technique for Real-Time Multimedia Processing in 3G Cellular Broadcast Networks
Found in: Real-Time Computing Systems and Applications, International Workshop on
By Yongwoo Cho, Kyungtae Kang, Joonho Lee, Heonshik Shin
Issue Date:August 2005
pp. 532-538
We analyze the execution time of MAC-layer Reed-Solomon error recovery in cdma2000 1xEV-DO broadcast and multicast services (BCMCS), with respect to cache size and air channel condition. We observe that a deteriorating channel condition often causes an int...
 
Guaranteeing the End-to-End Latency of an IMA System with an Increasing Workload
Found in: IEEE Transactions on Computers
By Min-Young Nam,Jaemyoun Lee,Kyung-Joon Park,Lui Sha,Kyungtae Kang
Issue Date:June 2014
pp. 1460-1473
New features are often added incrementally to avionics systems to minimize the need for redesign and recertification. However, it then becomes necessary to check that the timing constraints of existing as well as new applications are met. We facilitate the...
 
Intelligent Electrocardiogram Monitoring System for Early Arrhythmia Detection
Found in: 2014 IEEE 28th International Conference on Advanced Information Networking and Applications (AINA)
By Juyoung Park,Kuyeon Lee,Kyungtae Kang
Issue Date:May 2014
pp. 1105-1110
An electrocardiogram is a record of the electrical activity of the heart. There has been considerable research on associated monitoring techniques and on the automated analysis of the resulting data. We integrate these processes within an intelligent heart...
 
Determination of Delay Bound over Multi-hop Real-Time Switches with Virtual Output Queuing
Found in: 2014 IEEE 28th International Conference on Advanced Information Networking and Applications (AINA)
By Sanghwa Han,Kyungtae Kang,Junhee Ryu
Issue Date:May 2014
pp. 892-898
Predictable and guaranteed response is an essential characteristic of safety-critical real-time systems. Thus we need to guarantee that the end-to-end latency of data exchange within such a system is always bounded and controlled, so that the overall syste...
 
Arrhythmia detection from heartbeat using k-nearest neighbor classifier
Found in: 2013 IEEE International Conference on Bioinformatics and Biomedicine (BIBM)
By Juyoung Park,Kuyeon Lee,Kyungtae Kang
Issue Date:December 2013
pp. 15-22
Automatic interpretation of electrocardiography provides a non-invasive and inexpensive technique to analyze the heart activity for different cardiac conditions. The emergence of smartphones and wireless networks has made it possible to perform continuous ...
   
Strategy to Reduce I/O Access Time of Applications in Virtual Machines
Found in: 2013 International Conference on IT Convergence and Security (ICITCS)
By Jaemyoun Lee,Sanghwa Han,Junhee Ryu,Kyungtae Kang
Issue Date:December 2013
pp. 1-2
An input/output (I/O) device can incorporate mechanical devices that require physical movements, such as a hard drive seeking a track for a data read or write. Hence I/O operations on a computer can be extremely slow compared to data processing. When a pro...
   
Providing Medical-Grade QoS for Real-Time M-Health Telemetry with Cellular Technology
Found in: Computer
By Kyungtae Kang
Issue Date:February 2013
pp. 1
We evaluate the the use of cellular communications mobile wireless healthcare by examining the implementation of an example wireless electrocardiogram application in a CDMA2000 1xEV-DO network. We endeavor to quantify "medical-grade" real-time qu...
 
Modeling towards incremental early analyzability of networked avionics systems using virtual integration
Found in: ACM Transactions on Embedded Computing Systems (TECS)
By Jung-Eun Kim, Kyung-Joon Park, Kyungtae Kang, Lui Sha, Min-Young Nam, Rodolfo Pellizzoni
Issue Date:December 2012
pp. 1-23
With the advance of hardware technology, more features are incrementally added to already existing networked systems. Avionics has a stronger tendency to use preexisting applications due to its complexity and scale. As resource sharing becomes intense amon...
     
End-to-end delay analysis of wireless ECG over cellular networks
Found in: Proceedings of the 1st ACM international workshop on Medical-grade wireless networks (WiMD '09)
By Jung-Eun Kim, Kyung-Joon Park, Kyungtae Kang, Lui Sha, Man-Ki Yoon, Min-Young Nam
Issue Date:May 2009
pp. 1-2
In this paper, we present a medical-grade network architecture based on the wireless cellular technology of CDMA2000 1xEV-DO (Evolution-Data Optimized). It can provide highly reliable communication with a bounded delay by exploiting its inherent channel ac...
     
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