Sponsored by FutureMobile Inc./CyberCom group
Tutorials will take place in parallel
with the technical sessions, 17th to 19th May 2004
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Monday, May 17, 14.00 – 17.30 Mantegna
T-01 WLAN/3G Interworking
Apostolis Salkintzis, Motorola
The recent evolution and successful deployment of WLAN systems
worldwide has fueled the need for interworking mechanisms between
WLANs and cellular telecommunication networks, such as GSM/GPRS,
UMTS, cdma2000, etc. Several forums and standardization bodies
worldwide have already initiated activities for exploiting WLAN
technology and integrating this technology into cellular telecommunication
networks. In addition, several R&D projects are currently
underway, which address vertical handovers between WLANs and
UMTS, as well as common authentication, authorization and accounting
procedures. It is evident that the integration of WLANs and cellular
telecommunication networks is of paramount importance nowadays,
from both business and technology points of view. This tutorial
will concentrate on this integration and will thoroughly examine
all the alternative architectures proposed to date for interworking
between WLANs and 3G cellular systems. In addition, it will address
the key technical issues, such as security, quality of service,
billing, roaming, etc.
Monday, May 17, 10.30 – 12.30 Washington A
T-04 Turbo Tranceivers for Wireless Communications
Lajos Hanzo, University of Southampton, Tadashi Matsumoto, University
of Oulo
Discovery of the Turbo codes has driven research on the creation
of new signal detection concepts that can, in general, be referred
to as the Turbo approach. Recently, this approach has made a
drastic change in creating signal detection techniques and algorithms
such as equalization of inter-symbol interference (ISI) experienced
by broadband single carrier signaling over mobile radio channels.
A goal of this tutorial is to provide the course takers with
broad views and knowledge of Turbo codes by explaining how the
Turbo concept-based signal transmission techniques are developed
in various applications, and how they improves performances.
To achieve this goal, the two instructors (Prof. Lajos Hanzo
and Prof. Tad Matsumoto) introduce the Turbo concept-based techniques
from their own viewpoints and backgrounds.
Tuesday, May 18, 8.30 – 12.30 Mantegna
T-05 Distributed-MIMO Multi-Stage Communication Networks
Hamid Aghvami, Mischa Dohler, Kings College, London
The aim of this tutorial is to expose an industrial and academic
audience to the challenges related to the analysis, design and
deployment of recently emerged Distributed-MIMO Multi-Stage Communication
Networks at PHY, MAC and network layers. The logical thread of
the tutorial, ranging from the underlying Shannon theory to resource
allocation and scheduling within distributed networks, proves
vital in conveying the most essential issues relating to the
design of these networks. The tutorial will commence with a brief
overview of distributed-MIMO multi-stage communication networks,
including their potential applications as well as engineers'
objectives when designing such networks. This will be followed
by a review of MIMO Shannon theory and relaying technologies,
both of which constitute inherent ingredients to the understanding
of the gains offered by distributed relaying networks. A thorough
Shannon theory of these networks will then be presented with
novel twists on closed form capacity formulas over ergodic and
non-ergodic, traditional and orthogonalised MIMO channels obeying
various channel fading statistics. The output from this will
be shown to be useful in deriving explicit optimum fractional
resource allocation rules such as to achieve optimum end-to-end
throughput. The analysis, design and performance of distributed
space-time block and trellis codes, concatenated with outer channel
codes, will be dealt with in sufficient depth. The derived deployment
guidelines will then be utilised to design properly functioning
MAC protocols, which reflect the characteristics of the underlying
distributed PHY layer as well as the served IP traffic. Performance
examples will be given, and important cross-layer design guidelines
elaborated upon. Finally, open research topics for academia and
industry will be suggested.
Monday, May 17, 10.30 – 17.30 Viconti
T-6/8 B3G & TDD - Key Air Interface Technologies for Future
Services
Harald Haas, Stephen McLaughlin, University of Edinburgh
This tutorial aims to provide a perspective on the key drivers
for present and future cellular communication systems and some
of the key technologies, in particular emerging air radio interface
solutions for the future Beyond 3G (B3G) or 4G networks. The
generations of mobile communication systems have been identified
by the technology implemented at the air radio interface. The
capacity, performance and the implementation complexity of the
systems are determined with the main building blocks of this
interface. Future cellular systems need to support a plurality
of different high data rate services with different load requirements
for uplink and downlink efficiently. This tutorial will describe
the main requirements and the state-of-the art achievements in
the air interface technologies for the B3G networks, including
multiple access techniques (based on spread spectrum and multi-carriers),
advanced signal processing techniques (multi-user detection,
turbo codes), multiple antennas solutions (transmit/receive diversity,
smart antennas). It will provide an understanding of the challenging
and open issues related with the current and future research
and development in the field of the air radio interface for B3G
networks. The presenters see a particular challenge of the future
in research on and the deployment of the appropriate duplexing
technique instead of multiple access technique as was the focus
in the past. In this context, also using TDD in cellular systems
seems to be the most appropriate choice. Therefore, in this tutorial
the properties of TDD are discussed in detail especially when
used in a cellular environment. This involves a discussion of
combining strategies of existing FDD based air interfaces (e.g.
UTRA-FDD (UMTS terrestrial radio access)) and TDD based air interfaces
(e.g. UTRA-TDD, IEEE 802.11, etc.).
Monday, May 17, 14.00 – 17.30 Caravaggio
T-09 MAC and Routing Protocols for Ad Hoc Wireless Networks
Using Smart Antennas
Somprakash Bandyopadhyay, Indian Institute of Management
Mobile Ad Hoc Networks (MANET) is a new paradigm of wireless
local area network enabling instantaneous group communications
immediately and easily without the aid of any established infrastructure
or centralized administration. Usually, the user-terminals in
ad hoc networks are equipped with omni-directional antennas.
However, ad hoc networks with omni-directional antenna normally
use a medium access mechanism that wastes a large portion of
the network capacity by reserving the wireless media over a large
area. To overcome this problem, researchers have proposed to
use directional or adaptive antenna that would largely reduce
radio interference, thereby improving the utilization of wireless
medium and consequently the network throughput. This tutorial
will first present an overview of basic MAC and routing protocols
in ad hoc networks with omnidirectional antenna to discuss the
issues and challenges. Subsequently, the tutorial will focus
on the use of smart antennas in ad hoc networks and discuss the
strategies and techniques to be used in designing MAC and routing
protocols for improved medium utilization and improved routing
performance with effective load balancing. Finally, it will discuss
some of the design issues related to QOS-Aware MAC and routing
protocols with smart antennas to illustrate the potential of
these antennas vis-à-vis omni-directional antennas in
the context of ad hoc networks. Open problems and challenges
for ad hoc networks with smart antennas and their applicability
in inter-vehicular communications conclude the presentation.
