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Tutorials
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Anytime, Anyplace, Anyhow
Multimedia Wireless Access:
The vision of Mobile Ad Hoc Networking
Prof. George N. Aggélou
Institute of Technology, Athens, Greece/ G-Alpha Telecomms,
Athens, Greece
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Internet Multimedia Traffic Patterns
Dr. Petre Dini
Cisco Systems, Inc. / Concordia
University, USA
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Realizing
the Vision of On-Demand Networking
Mr John Strassner
Chief Strategy Officer, Intelliden
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Tutorials
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Anytime,
Anyplace, Anyhow Multimedia Wireless Access:
The vision of Mobile Ad Hoc Networking
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Presenter
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Professor George N. Aggélou
Institute of Technology, Athens, Greece
Director, G-Alpha Telecomms, Athens, Greece
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Abstract
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The past decade has shown a phenomenal growth in
wireless communications. Cellular systems have been standardized and
Personal Communication Services (PCS) and the 3 rd generation radio
technology are being used providing wide-band services to mobile
users.
Additionally, wireless networking is being used
more and more in both fixed and mobile usage scenarios, whereas high
quality multimedia (voice, video and data) services over high-speed
wireless local area networks (LANs) are becoming a reality. Wireless
LANs (e.g. HiperLAN2, IEEE 802.11), being interconnected to a fixed
network, are offering up to 54Mbps both to residential and business
environments with high quality of service (QoS). The demand of these
multimedia applications has been largely witnessed so far in fixed
networks but as life style is rapidly changing, internet-like
applications are more and more attractive to mobile users as well.
In parallel with (and separately from) the single
hop model for today’s cellular/wireless communications, another
type of model based on radio to radio multihopping, has been
evolving to serve a growing number of applications which rely on a
fast deployable, multihop, wireless infrastructure. A multihop
mobile radio network, also called mobile ad hoc network (MANET) is a
self-organizing and rapidly deployable network in which neither a
wired backbone nor a centralized control exists. The network nodes
communicate with one another over scarce wireless channels in a
multi-hop fashion. The ad hoc network is adaptable to the highly
dynamic topology resulted from the mobility of network nodes and the
changing propagation condit ions.
MANETs are a new paradigm of wireless wearable
devices enabling instantaneous person-to-person, person-to-machine
or machine-to-person communications immediately and easily. One can
foresee that in the near future most of the commercial laptops and
PDAs will be equipped with radios enabling them to form ad hoc “virtual”
wireless networks. Possible commercial applications include business
associates sharing information during a meeting, students using
laptop computers to participate in an interactive lecture, and
emergency disaster relief personnel coordinating efforts in natural
disasters. In these applications, where a fixed backbone is not
available, a readily deployable wireless network is needed. Mobile
ad hoc networks are also a good alternative in rural areas or third
world countries where basic communication infrastructure is not well
established. Another interesting application of mobile ad hoc
networks is ubiquitous computing. Intelligent devices are connected
with one another via wireless links and are self-organized in such a
way that a newly joined node can request service from local servers
without any human intervention.
When designing mobile ad hoc networks, several
interesting and difficult problems arise due to shared nature of the
wireless medium, limited transmission power (range) of wireless
devices, node mobility, and battery limitations. The limited
transmission range of wireless network interfaces coupled with the
highly dynamic routing infrastructure, due to mobility, create a lot
of concerns when addressing issues such as dynamic routing,
efficient channel access and quality-of-service (QoS) support.
This tutorial addresses four areas in the area of
wireless ad-hoc networking: Application of the Ad-Hoc Technology,
Routing Protocols & Mobility Management Algorithms, Medium
Access Control Schemes & Quality of Service Based Routing, and
Applicability of Ad Hoc Technology to current Mobile Wireless
Communication Architectures.
More specifically, the tutorial describes first
the idea of ad hoc networking and scenarios where this technology
will make an impact. How the environment of an ad hoc network is
very different from the wired environment, and the effect this has
on the design and operation of routing protocols for ad hoc networks
are extensively explained. A description of a number of different
issues related to medium access control (MAC), routing, and QoS in
mobile ad hoc networks, including the prominent protocols under
consideration for standardization by the IETF, follows up. Finally,
integration issues with wide area mobility models, such as
Mobile-IP, and Cellular systems, such as the GSM, are also
discussed. Novel solutions/patents proposed and published by
the speaker conclude each technical section. Open problems
and challenges for ad hoc networks conclude the presentation.
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Presenter's biography
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George N. Aggélou is presently an Associate
Professor of Electronic and Electrical Engineering at the Institute
of Technology, Athens, Greece and the director of G-Alpha Telecomms,
Athens, Greece. In the past years, Prof. Aggélou joined various
international companies, including IBM, Thomas J. Watson Research
Center, NY - USA, D.M. Data, NJ - USA, CISCO Systems, London –UK,
and INTRACOM S.A, Athens - Greece. In 1999, he co-founded Mobile
E-Commerce Technologies, in London, UK.
Prof. Aggélou is the editor of a number of
conference and journal publications, IETF drafts and one patent. He
is the author of the book “Mobile Ad Hoc Networking: Design and
Integration” by McGraw-Hill, February 2003, and co-author of the
book “Handbook of Wireless Ad Hoc Networks” by CRC Press,
September 2002. His research interests include Mobile Networking
Protocols, Wireless Ad Hoc Networks, Routing Algorithms and
Communication Protocols, QoS provisioning in IP-based wireless
multimedia networks, signalling for QoS-aware protocols and Wireless
MAC protocols.
Prof. Aggélou is the recipient of the 2000 RACAL
Prize for Research Excellence, received by Dr. Chris Ash, RACAL
Research Director. He serves on the editorial board of the IEEE
Transactions on Wireless Communications (TWireless). In the past,
George has served as a technical program committee member in a
number of international conferences and as a panelist at ATAMS'
2001.
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Tutorial Outline
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INTRODUCTION TO WIRELESS NETWORKS
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a. Enabling Technologies (FDMA, TDMA, CDMA, TDD/FDD, the cellular
principle)
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GSM/GPRS wireless communications systems
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Baseline UMTS infrastructure
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Evolution of All-IP wireless networks
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MOBILE AD HOC NETWORKING
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DYNAMIC ROUTING IN MOBILE AD HOC NETWORKS
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Routing problems in MANETs
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Standardization efforts and the role of the IETF MANET WG
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Overview of IETF MANET Routing Protocols & Analysis of the
RDMAR protocol (IETF candidate by G. N. Aggélou)
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WIRELESS MEDIUM ACCESS CONTROL/CHANNEL ACCESS PROTOCOLS
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Problems at Wireless Access Layer
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Overview of IEEE 802.11 & ETSI HIPERLAN type 2 protocols
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Analysis of MBCA/BRCA Channel Assignment (Filed for Patent by G. N.Aggélou)
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QUALITY-OF-SERVICE (QOS) IN WIRELESS/MOBILE NETWORKS
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INTEGRATION WITH WIDE-AREA MOBILITY MODELS
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Techniques in Cellular Radio Networks (channel assignment algorithms,
handoff schemes, diversity techniques, sectorization/cell splitting,
micro/pico-cellular)
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Mobility Management in Wireless Networks (call processing and signaling)
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Issues, Challenges & System Requirements
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Analysis of an integrated GSM-MANET model (Proposed model to Nokia
3G Lab/UK by G. N. Aggélou)
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SUMMARY AND CONCLUDING REMARKS
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Intended Audience
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The goal of the tutorial is to comprehensively expose the state-of-the-art in ad-hoc
networking, with the emphasis on the applicability of the ad-hoc technology to current
and future commercial communications systems.
The tutorial is targeted towards a broad audience, both from the academic and the
industrial environments. It is designed to provide the attendees with a focused view on
what are the issues, the solutions, and the techniques used in today's and future
wireless networks. Mobile Networking professionals who want to develop better
understanding of technology trends and identify new market opportunities in the
space of short range wireless networking will also benefit from this tutorial.
Basic understanding of layered network architecture is expected. No background in
wireless communication is required. Researchers who want to identify open research
problems in the area of personal area networking will also find this tutorial very
useful.
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Internet
Multimedia Traffic Pattrerns |
Presenter
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Dr. Petre Dini
Cisco Systems, Inc. / Concordia University
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Abstract
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Internet multimedia traffic is increasing as
applications like streaming media and packet telephony grow in
popularity. In the North America, data traffic volumes now regularly
exceed voice traffic volumes. It is expected that the predominant
form of traffic carried over advanced networks will be computer to
computer traffic. Therefore, understanding the new tendencies in
network traffic becomes a key factor for monitoring and managing
tomorrow's networks. The tutorial presents particular traffic
challenges in multimedia environments.
In the first part, the tutorial introduces
Internet traffic and multimedia aspects related to it. The second
part is dedicated to traffic modeling, and especially to particular
multimedia traffic patterns. The third part is devoted to multimedia
monitoring and management, while the last part illustrates special
use cases on content delivery and GRID networks.
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Internet Traffic
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Internet Multimedia Traffic
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Internet Multimedia Traffic Modelling
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Traffic Patterns
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Multimedia Traffic Patterns
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Service Differentiation and QoS Handling to
support Internet Multimedia through Traffic Monitoring
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Dynamic Packet Filtering
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Internet Traffic Management
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Special Multimedia Traffic concerns in
Content Delivery
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Particular issues in Internet Multimedia GRID
Networks
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Presenter's biography
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Petre is a Senior Technical Leader with Cisco
Systems, Inc., being responsible for policy-based strategic
architectures and protocols for network management, QoS, SLA, and
Performance, Programmable Networks and Services, Provisioning under
QoS constraints, and Consistent Service Manageability. He’s
industrial research interests include mobile systems, performance,
scalability, and policy-related issues in GRID networks. He’s also
working on particular issues in multimedia systems concerning
traffic patterns and security. He worked on various industrial
applications including CAD/CAM, nuclear plant monitoring, and
real-time embedded software. In early 90’s he worked on various
Pan-Canadian projects related to object-oriented management
applications for distributed systems, and to broadband services in
multimedia applications. As a Researcher at the Computer Science
Research Institute of Montreal he coordinated many projects on
distributed software and management architectures. In this period he
was an Adjunct Professor with McGill University, Montreal, Canada,
and a Canadian representative in the European projects. Since 1998
he was with AT&T Labs, as a senior technical manager, focusing
on distributed QoS, SLA, and Performance in content delivery
services.
He is the IEEE ComSoc Committee Chair of Dynamic
Policy-Based control in Distributed Systems, and actively involved
in the innovative NGOSS industrial initiative in TeleManagement
Forum. Petre is also a Rapporteur in Study Group 4 at ITU-T. He has
been an invited speaker to many international conferences, a
tutorial lecturer, chaired several international conferences, and
published many technical papers.
He is currently an Adjunct Professor at Concordia
University, Montreal, Canada, a Senior IEEE member, and an ACM
member.
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Realizing
the Vision of On-Demand Networking |
Presenter
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John Strassner, Chief Strategy Officer, Intelliden
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Abstract
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In today's economy, everyone must learn to do
more with less. With respect to network services, this means that a
new genre of management applications is required to accommodate more
users that use more demanding applications that have conflicting
requirements on their shared environment. The key to solving this
problem is to realize that currently, network operation is divorced
from how the business operates, and that current approaches don't
address this problem.
This tutorial will discuss the four key foundational elements of
solving this problem - use of standard information models, the
transformation of these information models to a set of data models
to suit the characteristics of different management data, the
holistic combination of policy and process management, and a
distributed interface oriented architecture that can realize the
power of the previous three elements.
More specifically, the information models discussed will be DEN-ng
(the new version of the original Directory Enabled Networks
standard) and the Shared Information and Data model - both being
built under the auspices of the TeleManagement Forum. In this
section, focus will be directed on two important characteristics of
these models - their representation of business, system, and
implementation entities, and their innovative modeling of policy and
network resources (especially how to configure a network
resource).
The second portion of the tutorial will discuss how the information
models, which are independent of platform, language and protocol,
are transformed into multiple data models, each of which are very
dependent on platform, language and protocol. Coherency between the
multiple data models will be discussed. It will be shown that this
is an implementation of the OMG's Model Driven Architecture
initiative.
The third portion of the tutorial centers around the theme that the
combination of policy and process management is required to built
high-performance distributed systems. The architectural implications
of this lead naturally into the concluding portion of the tutorial,
which discusses how the TeleManagement Forum's NGOSS architecture
can be used to meet our goals. The NGOSS is a business-oriented
solution framework for defining a next-generation OSS.
This tutorial will be of interest to system and software architects,
developers and project managers, as well as technical and business
team leaders that want to gain an understanding of future OSS
solutions.
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Presenter's biography
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John Strassner, the founder of Directory Enabled
Networking (DEN) technology, currently serves as Chief Strategy
Officer for Intelliden, providing the overall direction and strategy
for the definition and development of the company's patent-pending
software management suite. He is a former Cisco Fellow who was
instrumental in setting the direction for directory- and
policy-enabled products and technologies within Cisco and the
industry. He first developed DEN as a new paradigm for managing and
provisioning networks and networked applications. Currently, he is
the rapporteur of the NGOSS metamodel working group (this extends
the UML metamodel to incorporate NGOSS concepts), rapporteur of the
NGOSS behavior and control working group (this defines how policy
and process management can be used to manage the behavior of an
NGOSS system), co-chair of the TMF Shared Information and Data
modeling work group (which is where DEN-ng and other modeling
activities live), member of the TMF NGOSS Steering Group (chartered
to set the definition and direction of the NGOSS architecture).
Strassner is currently leading the effort to define and implement
the next version of the DEN specification, called DEN-ng, in both
the TMF as well as in Intelliden products. DEN-ng was built to
accommodate the needs of NGOSS architectures, and features the use
of patterns and roles. He is the author of the book Directory
Enabled Networks, and is currently authoring a new book, called
Policy Based Network Management. Strassner is a frequent speaker at
many leading international industry conferences.
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