Third Asian Himalayas International Conference on Internet AH-ICI2012
The Next Generation of Mobile, Wireless and Optical Communications Networks
Mobility, Home-consumer Communications and Health Networking, Electronic Commerce -Mobile Payment, Broadband access -Satellites

23th, 24th and 25th of November, 2012
Institute of Engineering IOE, Kathmandu, Nepal


Title: Online Game Systems - A Networking Perspective


This tutorial covers the concepts underlying networked games (NGs) and networked virtual environments (NVEs), from their definition, to distributed systems, to networking fundamentals, quality of experience and game design needs.

Topics include:
- the challenges of networked games
- the origins of networked games technology
- communications architectures
- managing dynamic shared state and game playability
- systems design
– client server vs peer to peer
- resource management for scalability and performance

Biography: Magda El Zarki received the B.E.E. from Cairo University, Cairo, Egypt in 1979 and M.S. and Ph.D. degrees in Electrical Engineering from Columbia University, New York City, NY in 1981 and 1987 respectively with a two year break from 1981 -1983 when she worked as a network planner in the international telecommunications department at Citibank, N.N., NYC, NY.

Magda El Zarki currently holds the position of Professor in the Department of Computer Science at the University of California, Irvine, where she is involved in various research activities related to telecommunication networks and networked computer games. She is the Director of the Computer Games and Virtual Worlds Center and heads the Computer Game Science Degree program. Prior to joining UC, Irvine, she was an Associate Professor in the Department of Electrical Engineering at the University of Pennsylvania in Philadelphia where she also held the position of Director of the Telecommunications Program. She was director of the Networked Systems Graduate Program at UC, Irvine from 2005 – 2007. From 1992 – 1996 she held the position of Professor of Telecommunications at the Technical University of Delft, Delft, The Netherlands. She was the recipient of the Cor Wit Chair in Telecommunications at TU Delft from 2004 – 2006.

Ms. El Zarki is an editor for several journals in the telecommunications area, and is actively involved in many international conferences. She was on the board of governors of the IEEE Communications society and was the vice chair of the IEEE Tech. Committee for Computer Communications. She is co-author of the textbook: Mastering Networks – An Internet Lab Manual.

Half a day

Title: Optical Communications Networks and Devices

Professor Dr. Alok Kumar Das

Electronics & Communication Engineering Deptt.
Jadavpur University, Kolkata-700 032, India
Phone: +91 33 2436 3733(R), +91 33 2414 6010(O)

Abstract: To accommodate the skyrocketing amount of traffic, optical network with wavelength division multiplexing (WDM) having several wavelengths per fiber as channels, is the most feasible solution. Transmission rate of a channel is currently 2.4, 10 or 40 Gbps. With the advent of WDM technology, IP (Internet Protocol) backbone carriers are now connecting core routers directly over point-to-point WDM links (IP over WDM). This layer structure with a help of GMPLS (Generalized Multi Protocol Level Switching) and OXC (Optical Cross Connect) with IP packets are directly mapped into wavelength channels. The signal without O-E-O (optical to electrical and electrical to optical) conversion reduces the deployment time and thus produces additional network robustness. The technologies for core networks (intercity), metro networks for MANs (intracity), and local access networks for the services to the home or business, need rapid provisioning of connections within each subnet. For transparent WDM networks, it needs to solve the routing- and- wavelength-assignments (RWA) problems. In a larger networks having more number of nodes, more wavelengths are needed and to avoid the large number of wavelengths the wavelength-routed networks overcome these limitations through wavelength reuse, wavelength conversion, and optical switching. The dynamic lightpath establishment concerns in OCS (optical circuit switches), OPS (optical packet switches) and OBS (optical burst switches) networks. Now-a-day there is a need to develop efficient optical components and devices relevant to the different optical networks.

The objective of the tutorial is to provide the attendees first in understanding different basic topologies of the network and to show the better performance of the mesh one to obtain the maximum throughput and bandwidth of the network and also cost effective. Maturity and potentiality of Optical Cross-Connects (OXC), Optical Circuit Switching (OCS), Optical Packet Switching (OPS) and Optical Burst Switching (OBS) will be discussed. Optical level switching (OLS) offers interoperability between OPS, OBS, and OCS and demonstrates successfully in Global optical network for multi-service applications. Unlike electronic packet switching routers, optical routers can exploit many wavelengths to reduce the buffer sizes. The technological aspects of optical switching and the overview of advances carried out in the Network of Excellence (NoE) e-Photon/ONe+ also will be addressed. The analysis for throughput and bandwidth maximization of some mesh networks like NSFNET, JGN, and BSNL will be discussed. We shall discuss the router and routing techniques and different switches and their implementations. The different implementation methods of the switches are mechanical, MEMS, liquid crystals, bubble, waveguide type TO (Thermo-optic) and EO (Electro-optic) switches, wavelength routing switch (AWG and tunable λ), semiconductor optical Phased Array, optical RAM, etc. These optical switches are very efficient and depending on size, capacity, speed, scalability, and cost one technology may prove superior to another, at least for specific needs. The advantages and disadvantages of electrical, Opto-electronics and optical switches and in-depth understanding for their requirements considering the limitation of the bandwidth between the links in different network systems will be discussed. The other waveguide type devices like modulators, attenuators, add/drop filters, couplers, power dividers and combiners, TE and TM mode splitters etc., required for optical networks, will be discussed considering their low losses and compact sizes. Now-a-day polymeric optical waveguide devices have attracted great interest in the field of integrated optics as it offers many advantages compared with other available waveguide materials because of their potential for easy, low-temperature and low-cost processing, highly tunable material index with large Thermo-optic coefficient. It also offers EO property with large Electro-optic coefficient. It possesses high nonlinear optical property for high speed and wide-band signal processing. The demand for low priced polymeric optical fibers (POF) is increasing due to their many short distance applications (10Gbps transmission over 100 meters) including fibers in home. Lastly, we shall discuss the networking of 21st century.

Biography: Professor Dr. Alok Kumar Das graduated in 1965 from Jadavpur University, Kolkata, India in Electronics and Telecommunication Engineering. He completed his Master and PhD degrees in Engineering from the same University in 1967 and 1972, respectively. He is a senior Professor in the Department. Dr. Das is a senior member of IEEE and is the winner of the prestigious IEEE 2000 Millennium award. His research interest is in the field of Optical fiber communication systems including integrated optics and optical networks. He has directed several sponsored projects in the area of optical fiber components, optical networks, and optical instruments. Dr. Das is directly involved in the development of optical wave-guiding devices like interconnects, modulators, switches, and attenuators. He was Visiting Professor in the City University of Hong Kong almost every year from 1999 to 2005 and also in Chung-Ang University, Seoul, Korea, in 2006, for the development of optical devices, to be required in optical network applications. Currently he is involved to develop both Thermo-optic and Electro-optic Polymeric materials for the fabrication of optical devices. Dr. Das has given several invited talks in US, Canada, Japan, Germany, China, S. Korea, and others and editor of several journals including IEEE. Dr. Das published about 145 papers in refereed journals and conference proceedings including IEEE, Applied Optics, Optics Lett. Electronics Lett.

Title: Near Shannon Limit Channel Codes: Modified Turbo Codes

Professor Dr. Prakash D. Vyavahare

Senior Member IEEE,
Professor, Department of Electronics and Telecom. Engg.
S. G. S. Institute of Technology and Science, INDORE (M. P.)

Abstract: Digital Communication techniques are widely used over the last few decades for transmission of voice, video and data. Error detecting and correcting codes (Channel codes) are employed in such systems to achieve reliable transmission of digital data. Such codes add controlled redundant information (parity bits) to the transmitted message for error recovery at the receiving end. Shannon’s legendary “Channel capacity theorem” (1948) set milestones in theoretical limits on communication in presence of noise which, in turn, resulted in the evolution of Channel coding. Over the last six decades, many researchers have proposed and investigated numerous channel codes to achieve higher coding gains. Turbo codes (Berrou, et. al. 1993) are modern near Shannonian limit codes which are used in modern wireless communication system standards. Recently, a class of low complexity hybrid turbo codes called as Low Complexity Hybrid Turbo codes (LCHTC) and Improved Low complexity Hybrid Turbo Codes (ILCHTC) are being proposed which have equivalent performance but lower complexity than that of Turbo codes. The tutorial aims to cover a panoramic view of various codes with emphasis on recent developments in the area of Turbo Codes, Modified Turbo Codes and their variants with their salient features.

Biography: Dr. Prakash D. Vyavahare (SM-IEEE(USA), F-IETE(India), F-IE(India)) is Professor in Department of Electronics and Telecommunication Engg. at S. G. S. Institute of Technology and Science, Indore, India. He received his M. Tech. and Ph. D. degrees from IIT Bombay in 1976 and 1995 respectively. He worked at Tata Institute of Fundamental Research, Bombay as Communication Engineer from 1976 to 1982. He was Hindu-Hitachi scholar at Hitachi Ltd. Japan in 1981-82. He then joined SGSITS Indore (1982) and in past held various positions in the institute such as Head of the Department (Electronics and Telecommunication Engineering), Dean (R & D) and Dean (Administration). He was associate of ICTP (UNESCO organization), Trieste, Italy during 1998 to 2005. He has 24 papers to his credit in international and national journals including IEEE Transactions in Communications, IEEE Transactions on Electronic Devices and IEEE Transactions on Instrumentation and Measurement. In the past, he has delivered seminars at various organizations including CERN (Geneva), Milan polytechnic Milan and INRIA Rocquencourt France. His areas of interests include channel coding, channel modeling, cross layer design issues and secure communication.