IEEE BROADNETS 2005

Tutorial 1

Title: Wireless Mesh Networks
Speaker: Prasant Mohapatra [UC Davis]
Duration: Monday, Oct. 3, 2005, 8:30am~12:00pm

Abstract: WIreless MEsh NETworks (WIMENETs) are composed of several wireless routers that provide multihop communication paths between wireless clients as well as facilitate connection to the wide area network and the Internet. The wireless routers are mostly stationary while the client nodes may be stationary or mobile. WIMENETs can be used as a very low-cost local area network because of the avoidance of the installation costs of wired infrastructure. These networks will not only be useful for applications that are supported by wireless local area networks or mobile ad hoc networks, but also will have scope for usage in providing Internet access to various community networks, enterprise networks, and home networks. WIMENETs can be deployed strategically or in an ad hoc manner. Recently, WIMENETs have become a very active area of research, which is being pursued by both academia and industry. Several test-bed and experimental deployments are already in place. The low cost of deployment makes it very attractive in the commercial arena.

Considering the interests and activities in the areas of WIMENETs, it may be useful to grasp an in-depth view of these networks in terms of their organization, applications, protocols, and unsolved problems. This tutorial will provide a comprehensive study of various issues in WIMENETs. We will explore the issues associated with each of the protocol stack in a top-down manner. In addition, several issues that are unique to WIMENET will be discussed in the context of cross-layer aspects. We will also discuss the experiences and lessons learnt from various test-bed and experimental implementations. Techniques to build simple WIMENETs will be explained in this tutorial. We will overview the standard-related activities followed by the future outlook of WIMENETs. A topical outline of the tutorial follows.

Outline:
1. Introduction
    a. Motivations
    b. Architecture
2. Applications
    a. Potential applications
    b. Interoperability with wired Internet
    c. Support for Voice/Video
3. Transport Layer
    a. Characteristics
    b. Real-time traffic support
    c. TCP adaptations
    d. New transport layer protocols
4. Network Layer
    a. Single path routing
    b. Multi-path routing
    c. Hierarchical routing
    d. Multicasting and broadcasting
5. MAC Layer
    a. Characteristics
    b. Single channel multihop MAC
    c. Multiple channel multihop MAC
    d. Multiple radio multihop MAC
6. Physical Layer
    a. Directional antenna
    b. Smart antenna
    c. Multiple antenna systems
7. Cross Layer Issues
    a. Capacity
    b. Quality of service
    c. Security
    d. Network management
8. Testbed and Experiments
    a. Examples
    b. Lessons learned
    c. Building Wireless Mesh Networks
9. Standards
10. Future Visions

Biography: Prasant Mohapatra received his Ph.D. in computer engineering from the Pennsylvania State University in 1993. He was an assistant professor and then an associate professor at Iowa State University from 1993 to 1999, and then at Michigan State University till 2001. Since then he has been at University of California, Davis, where he is currently a Professor in the Department of Computer Science.

Dr. Mohapatra has published extensively in various international journals and conferences. He has been an invited speaker at several universities and other organizations in several countries. He has given several tutorials in various international venues, and has taught several advanced courses in computer networks, wireless networks, performance evaluation, and multimedia systems. His research work has been funded and collaborated by National Science Foundation, SIEMENS, EMC Corporation, Panasonic Technologies, Hewlett Packard, Rockwell International, and Intel Corporation.

He was/is on the editorial board of the IEEE Transactions on computers, ACM WINET, and Ad Hoc Networks. He has been on the program/organizational committees of several international conferences. He was the Program Vice-Chair of INFOCOM 2004 and MASS 2004, and the Program Co-Chair of the First IEEE International Conference on Sensor and Ad Hoc Communications and Networks (SECON 2004). He is also the Co-Chair of the First IEEE Workshop on Wireless Mesh (WiMesh 2005). He has been a Guest Editor for IEEE Network, IEEE Transactions on Mobile Computing, and the IEEE Computer.

Tutorial 2

Title: Optical Network Survivability – Fundamentals, Challenges, and Solutions
Speaker: Dr. Suresh Subramaniam [George Washington Univ.] and Dr. Srinivasan Ramasubramanian [Univ. of Arizona]
Duration: Monday, Oct. 3, 2005, 1:30pm~5:30pm

Abstract: This tutorial will present a comprehensive discussion of optical mesh network survivability, including some of the latest research in the field. Starting with the basic concepts of survivability such as link protection, path protection, and dynamic restoration, the tutorial will discuss a variety of approaches that have been implemented and/or proposed by researchers to design survivable mesh networks. The following topics will be among those covered by this tutorial.
- Approaches to build in redundant capacity at design time such as ring covers, meta mesh,
p-cycles, and SLSP.
- Dynamic shared restoration.
- Survivable network design to withstand multiple failures and SRLGs.
For each topic, the approach will be described, and a discussion on the complexity and effectiveness of the approach based on results from implementation or simulation will be presented.

Biography of Suresh Subramaniam: Suresh Subramaniam is an Associate Professor in the Electrical and Computer Engineering Department of the George Washington University. He received the Ph.D. degree in electrical engineering from the University of Washington, Seattle, in 1997.

He is an active researcher in the area of optical networks and has made many contributions in topics such as wavelength conversion, wavelength assignment, architectures, and survivability. He has been supported by grants from NSF, DARPA, and NSA. He is a corecipient of the "Best Paper Award" from the SPIE Conference on All-Optical Communication Systems in 1997, and an author of the paper that was voted among the “Top Ten” in INFOCOM'96. He is a co-editor of the book “Optical Networks - Principles and Practice” published by Kluwer Academic Publishers. Dr. Subramaniam is a member of the IEEE Communications Society.

Biography of Srinivasan Ramasubramanian: Srinivasan Ramasubramanian is an Assistant Professor in the Department of Electrical and Computer Engineering at University of Arizona since August 2002. He received his B.E. (Hons.) degree in Electrical and Electronics Engineering from Birla Institute of Technology and Science (BITS), Pilani, India, in 1997 and PhD in Computer Engineering from Iowa State Univeristy, Ames, in 2002. He is a co-developer of the Hierarchical Modeling and Analysis Package (HIMAP), a reliability modeling and analysis tool, which is currently being used at Boeing, Honeywell, and several other companies and universities.

His research interests include architectures and algorithms for optical networks, computer communication networks and protocols, fault tolerance, system modeling, and performance analysis. His recent work in optical networking involves modeling and analysis of survivable optical grooming networks with heterogeneous switching architectures.