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 9432211162 (M)
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 with 2.4, 10 or 40 Gbps is indeed achievable only in the electrical domain. With the advent of optical amplifiers in the mid 1990s and later on the feasibility of various types of optical switches, have enabled to consider the development of a new generation of optical networks in which optical signal with a given light path is routed without O-E-O (optical to electrical and electrical to optical) conversion and thus reduces the deployment time and produces additional network robustness. It has the advantage of eliminating the intermediate layer such as such as ATM and SONET/SDH. 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 OXC (Optical Cross Connect), optical circuit switches (OCS), optical packet switches (OPS), and optical burst switches (OBS) techniques are considered where OXC produces the switching fabric for long term traffic demands. The OCS, OPS and OBS techniques require a light path to reconfigure automatically the switching fabric. Optical level switching (OLS) offers interoperability between OPS, OBS, and OCS and demonstrates successfully in Global optical network for multi-service applications. 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 technologies for core networks (intercity), metro networks for MANs (intra-city), and local access networks for the services to the home or business, need rapid provisioning of connections within each subnet. The numerous investigations have been carried out to solve routing and wavelength -assignments (RWA) problem in this DWDM networks considering the static light path system applying OXC-based networks and the dynamic light path system applied to OCS, OPS and OBS-based networks.
The objective of the tutorial is to provide firstly the various investigations of optical transparency, mainly on optimization techniques related to RWA problem. The variation of quality of transmission (QoT) depending on RWA problem and hence for better network planning or better traffic engineering, will also be discussed. We consider the design of a network under long term traffic demands as OXC-based networks where as the dynamic traffic demands in OCS, OPS or OBS-based networks. Traffic statistic and optical burst overlap reduction in core routers of OBS networks will be discussed. In a second step, we describe the various devices for different components (Transponders, WDM multiplexers/de-multiplexers, amplifiers, optical fibers) to be required in a typical optical transmission system. Now-a-day there is a need to develop efficient optical components and devices relevant to the different optical networks with better (QoT). 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 ?), 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 networks requiring VLSI technology for better efficiency in the optical networks 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.
About the Speaker: 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 was a senior Professor in the Department and now he is a senior professor in Institute of Engineering and Management (IEM), Kolkata, India. 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, VLSI technology, 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 a Visiting Professor in the City University of Hong Kong almost every year from 1999 to 2005 to fabricate optical switches 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 fabricate Thermo-optic polymeric optical devices, PV module for solar energy conversion. Dr. Das has given several invited talks in US, Canada, Japan, Germany, China, S. Korea and editor of several journals including IEEE. Dr. Das published about 150 papers in refereed journals and conference proceedings including IEEE, Applied Optics, Optics Lett. Electronics Lett. He has been a consultant to industry, telecommunications operators, and government agencies in India, Singapore and Hong Kong.
Title: Data Warehouse Architecture
Professor, Management Development Institute, Gurgaon, India
Abstract: Data Warehouse Design and Implementation tutorial covers the essential strategies for creating a data warehouse to help your organization predict trends in business. The tutorial will teach you the logical design and physical implementation, and how to utilize them, provide ideas for making the data available to the people who make decisions. Objectives of the Tutorial are to acquaint participants with the theories and development in data warehouse technology and its growth.
The tutorial will cover (i) Data Warehouse Components (Data Warehouse Database; Sourcing, Acquisition, Cleanup and Transformation Tools; Meta Data; Access Tools; Data Mart; Data Warehouse Administration and Management; and Information Delivery System), (ii) Data Warehouse Architecture & Infrastructure (Data warehouse and business intelligence architecture; Database architecture, system architecture and infrastructure; Database sizing and performance; Mechanisms to extract, transform and load data; and Data backup/recovery processes), (iii) Dimensional Modeling Techniques (Relational v/s dimensional Models; Star Schemas; Design of fact tables; Design of Dimensional Tables), (iv) Data Extraction, Transformation, & Loading (ETL), and (v) Data Warehouse Implementation & Maintenance.
About the Speaker: N.P. Singh had done his B.Sc., M. Sc. from Meerut University, India; M.S. from BITS Pilani, India; and Ph.D. from CCS HAU Hisar, India. He has been working as Professor in Information Technology Area with Management Development Institute, Gurgaon, India since 2002. Prior to it he was Professor (Comp & MIS) with National Institute of Financial Management, Associate / Assistant professor with IRMA, and CCS HAU Hisar, India. He has published about 80 articles and guided 3 Ph.D. Students. He has done consulting with ADB, World Bank Projects, Government of Sri Lanka, and National Dairy Development Board etc.
Title: Privacy Preservation in Wireless Sensor Networks using Intelligent Secure Multi-party Computation
Dr. Durgesh Kumar Mishra
Professor (CSE) and Dean (R&D),
Acropolis Institute of Technology and Research, Indore, MP, India,
Ph - +91 9826047547, +91-731-4730038
Chairman, IEEE MP-Subsection,
Past Chairman IEEE Computer Society, Bombay Chapter,
Abstract: Sometimes the physically distributed computing devices in a network may be interested in computing some function of their private inputs without disclosing these inputs to one another. This type of computation falls under the category of Secure Multiparty Computation (SMC). The solution to SMC problems in Wireless Sensor Networks can be found with the modification of the data inputs or with some anonymization technique. Wireless Sensor Networks use sensing devices to collect data from the wireless environment and pass this data to the Internet through some gateway or sink. The sensor nodes use any of the radio technology like Bluetooth, IEEE 802.11 or Hiperlan for directly communicating with each other. The nodes behave as hosts as well as routers. The security challenges in these networks arise due to its vulnerable wireless link and hostile environment. An identification mechanism is needed between the nodes using identification and the credentials. This security architecture simultaneously leads to privacy problems. Some mechanism is needed which prevents a node to learn the identity or the credentials of other nodes. To provide location privacy in this scenario is a nontrivial task. Current routing protocols do not focus much on the security and the privacy issues. These aspects are postponed till further development. An authentication protocol is needed between nodes using some cryptographic technique. In service-oriented sensor network the denial of the service must be taken care of so that the availability of the service is maintained. The security requirement of the sensor network depends on its application. For example, for a simple hospital data administration the requirement is mitigated and for the military battlefield it is severe. Thus no general security architecture can be developed. Specific security architecture is needed for specific application. Much security related work is still pending and will add to the standards as the physical deployment will grow. In this talk, an emphasis is made on how SMC solutions can be used for privacy preservation during computation on data collected by the wireless sensor network and how artificial intelligence can be incorporated in WSN.
About the Speaker: Dr. Durgesh Kumar Mishra has received M.Tech. degree in Computer Science from DAVV, Indore in 1994 and PhD degree in Computer Engineering in 2008. Presently he is working as Professor (CSE) and Dean (R&D) in Acropolis Institute of Technology and Research, Indore, MP, India. He is having around 21 Yrs of teaching experience and more than 6 Yrs of research experience. He has completed his research work with Late Dr. M. Chandwani, in Secure Multi- Party Computation for preserving Privacy. He has published more than 75 papers in refereed International/National Journal and Conference including IEEE, ACM etc and listed in DBLP, Citeseer, etc. He is a Senior Member of IEEE and having responsibility of Chairman of IEEE MP subsection and past Chairman IEEE Computer Society, Bombay Chapter, India. Dr. Mishra has delivered his tutorials in IEEE International conferences in India as well as in other countries. He is also the programme committee member of several International conferences and Member of Editorial Board of National and International refereed Journals. He visited and delivered his invited talk in Taiwan, Bangladesh, Singapore, Nepal, USA, LONDON, UK and several places in India in Secure Multi-Party Computation of Information Security for preserving privacy. He is an author of one book also. He is also the reviewer of four International Journals of Information Security. He is a Chief Editor of Journal of Technology and Engineering Sciences. He has been a consultant to industries and Government organization like Sale tax and Labor Department of Government of Madhya Pradesh, India.