best site creator

MULTIMEDIA NETWORKING

The congestion of the network and the compressed video data affect the quality of presentations drastically. Especially, the loss of a frame does not only affect the display of the frame, it also affects the display of the dependent frames. We have proposed a Probe-loss utilization streaming (PLUS) mechanism to reduce the loss of high priority frames [2]. For an MPEG video stream, I frames have the highest priority and B frames have the lowest priority. The status of the network is probed with B frames and I frames are protected in a better way by reducing the congestion caused by the system. We have built a client server middleware design strategy for streaming multimedia presentations [1]. Moreover, we have also studied queuing for UDP and TCP protocols for multimedia streaming. We have analyzed hop-to-hop evaluation of queuing.

MULTIMEDIA SYNCHRONIZATION

Correctness and specification of coarse-grained synchronization are important when user interactions that change the course of a presentation are allowed. We have proposed a rule-based flexible multimedia synchronization model, named as SynchRuler. SyncRuler was also implemented using database triggers as PressBase. We have used model checking for verification. 

NETWORKING PUBLICATIONS

* K. Darabkeh and Ramazan S. Aygun. “Improving UDP performance using intermediate QoD-aware hop system for wired/wireless multimedia communications systems,” International Journal of Network Management, DOI: 10.1002/nem.768, Vol. 21, No. 5, pp. 432-454, 2011

* Kemal Akkaya, Murat Demirbas, and R. Savas Aygun. “The Impact of Data Aggregation on the Performance of Wireless Sensor Networks”, Wireless Communications and Mobile Computing, Volume 8, Issue 2, February 2008, pp. 171-193, DOI: 10.1002/wcm.454

* Khalid Darabkh and Ramazan Aygün, “TCP Traffic Control Evaluation and Reduction over Wireless Networks Using Parallel Sequential Decoding Mechanism,” EURASIP Journal on Wireless Communications and Networking, vol. 2007, Article ID 52492, 16 pages, 2007. doi:10.1155/2007/52492

Khalid Darabkh and Ramazan Savas Aygun. “Quality of Service Evaluation of Convolutional Decoding Using Fano Algorithms for TCP/IP-Based Systems in Packet Switching ATM Networks” 2006 International Conference on Internet Computing, Las Vegas, June 26-29, 2006.

* Khalid Darabkh and Ramazan Savas Aygun. “Performance Evaluation of Sequential Decoding System for UDP-Based Systems for Wireless Multimedia Networks” 2006 International Conference on Wireless Networks, Las Vegas, June 26-29, 2006.

* Khalid Darabkh and Ramazan Savas Aygun. “Quality of Service Performance Evaluation of Selective Message Discarding Policies for Multimedia Networking,” 2006 International Conference on Internet Computing, Las Vegas, June 26-29, 2006.

* K. A. Darabkh and R. S. Aygun, "Simulation of Quality of Service of Congestion Control in Multimedia Networking Using Frame Discarding Policies" Proceedings of 2006 SCS International Conference on Modeling and Simulation - Methodology, Tools, Software Applications (M&S-MTSA'06), Calgary, Canada, , July 31- August 2, 2006

* K. A. Darabkh and R. S. Aygun, "Simulation of Performance Evaluation of Error Control for Packet-to-Packet Acknowledgment Based Systems in ATM Networks" Proceedings of 2006 SCS International Conference on Modeling and Simulation - Methodology, Tools, Software Applications (M&S-MTSA'06), Calgary, Canada, July 31- August 2, 2006

* Yi Ma and Ramazan Savas Aygun. "The Methodology of Mesh-Cast Streaming in P2P Networks," 2005 IEEE Int. Workshop on Multimedia Information Processing and Retrieval (MIPR) in the Proceedings 7th IEEE International Symposium on Multimedia, December, 2005, pp. 611-615.

* Markus Mielke, Ramazan Savas Aygun, Yuqing Song, and Aidong Zhang. "PLUS: Probe-Loss Utilization Streaming Mechanism for Distributed Multimedia Presentation Systems", IEEE Transactions on Multimedia, December 2002, pp. 561-577

* Markus Mielke, Yuqing Song, Ramazan Aygun, Aidong Zhang, "NetMedia: Giving Control to Distributed Multimedia Presentation Systems" (Demonstration). 11th International Conference on Scientific and Statistical Database Management, Proceedings, Cleveland, Ohio, USA, 28-30 July, 1999, pp. 276

SYNCHRONIZATION PUBLICATIONS

* Ramazan Savas Aygun and Aditya Patil. "PressBase: A presentation synchronization database for distributed multimedia systems" IEEE Transactions on Multimedia, Vol. 8(2), April 2006, 289-296

* Ramazan Savas Aygun and Aidong Zhang. “SynchRuler: Rule-based Flexible Synchronization Modeling with Model Checking” IEEE Transactions on Knowledge and Data Engineering, Vol. 17(12), December 2005, pp. 1706-1720.

* Donna Carter and R. S. Aygun, “The Evaluation of State Explosion on Producer/Consumer Problem Using Promela/SPIN Model Checker” 10th World Conference on Integrated Design & Process Technology, Antalya, Turkey, 2007

* Donna M. Carter, Ramazan Aygun, Glenn Cox, Mary Ellen Weisskopf, and Letha Etzkorn. “The Effect of Uncontrolled Concurrency on Model Checking” Concurrency and Computation: Practice and Experience, Vol. 20, Issue 12, pp. 1419-1438, August 2008

* Aidong Zhang, Ramazan Savas Aygun, and Yuqing Song. "Streaming Multimedia Presentations in Distributed Multimedia Database Environments", in Handbook of Video Databases: Design and Applications, CRC Press, 2003, pp. 807-829

* Ramazan Savas Aygun and Aidong Zhang. " Management of Backward-Skip Interactions Using Synchronization Rules ", The 6th World Conference on Integrated Design & Process Technology, Pasadena, California, June 2002

* Ramazan S. Aygun and Aidong Zhang. "Interactive multimedia presentation management in distributed multimedia systems", Proc. of Int. Conf. on Information Technology: Coding and Computing, Las Vegas, April, 2001, pp. 275-279

* Ramazan S. Aygun. "An integrated framework for interactive multimedia presentations in distributed multimedia systems" (Doctoral Symposium), 2001 ACM Multimedia Conference, Ottawa, Canada, 2001, pp. 457-458

* Ramazan S. Aygun and Aidong Zhang. "Middle-Tier for Multimedia Synchronization" (Short Paper), 2001 ACM Multimedia Conference, Ottawa, Canada, 2001, pp. 471-474

* Ramazan Savas Aygun and Aidong Zhang. "Modeling and Verification of Interactive Flexible Multimedia Presentations Using PROMELA/SPIN", 9th International SPIN Workshop on Model Checking of Software, Grenoble, France, April 2002, pp. 205-212

ADDRESS
Computer Science Department
Technology Hall (OKT) N360
University of Alabama in Huntsville
Huntsville, AL 35899

CONTACT
Email: ramazan dot aygun at uah dot edu
Phone: +1 (256) 824 6455
Fax: +1 (256)824 6239