Short Courses/Tutorials
· In May/2006, we delivered a Short Course on Mobility Management and Architectures for 4G Networks at the 24th Brazilian Symposium on Computer Networks in Curitiba, Brazil. Tutorial details:
Title: Mobility Management and
Architectures for 4G Networks
Authors: Kelvin Dias, Dave Cavalcanti, and Carlos Cordeiro
·
In October/2004, we delivered a Tutorial on
Directional Antennas at the IEEE
International Conference on Mobile Ad Hoc and Sensor Systems (MASS 2004) in
Title: Directional Antenna Systems for
Mobile Ad Hoc and Sensor Networks
Authors: Carlos Cordeiro,
Hrishikesh Gossain, and Dharma P. Agrawal
Goals: Mobile Ad Hoc Networks (MANETs) and Sensor Networks (SNs)
employing omni-directional antennas are known to suffer from poor network
performance due to multi-hop forwarding requirements and insufficient spatial
reuse. The root of this problem is that traditional MAC and routing protocols
being used for these networks assume omni-directional antennas for
communication at the physical layer. Directional antenna systems are
increasingly being recognized as a powerful way for increasing the capacity,
connectivity, and covertness of both MANETs and SNs. Directional antennas can
focus electromagnetic energy in one direction and enhance coverage range for a
given power level. They also minimize co-channel interference and reduce noise
level in the common channel in a contention-based access scheme, thereby reducing
the collision probability. However, replacing an omni-directional antenna by a
directional one in MANETs and/or SNs is not by itself sufficient to exploit the
offered potential. The antenna system needs to be appropriately controlled by
each layer of the network protocol stack. Therefore, in this tutorial we
provide attendees with a broad overview on the various types of directional
antenna systems, associated problems, and solution approaches for utilizing
these antenna systems in ad hoc and sensor networks. We will describe, among
other things, research issues in physical, medium access control, neighbor
discovery, and routing revolving directional communications, and survey the
state of the art. We also cover the current efforts within IEEE to incorporate
a type of adaptive antenna system, called MIMO (Multiple-Input
Multiple-Output), into the next generation of high speed wireless communication
standards, and outline some of the proposed solutions.
·
In May/2003, we delivered a Short Course on Last
Mile Wireless Technologies at the 21th Brazilian
Symposium on
Computer Networks
in
Title: The Last Mile: Wireless
Technologies for Broadband and Home Networks
Authors: Carlos Cordeiro,
Hrishikesh Gossain, Roy L. Ashok, and Dharma P. Agrawal
Goals: Until recently, limitations of the access networks have been the
major obstacle to the "digital networked house". The well-known
"last mile problem" has hindered an effortless broadband access at
home and, therefore, has impacted the home networking applications. However,
recent advances in transmission and broadband access technologies are very
promising and are capable of bringing information superhighway to the houses
worldwide. More notably, broadband wireless access and home networking
technologies are being warmly accepted by homeowners because of ease of
installation, low cost, and high bandwidth. With this in mind, in this course
we investigate the concepts and technologies needed in between the consumers
and the service provider, also known as last mile technologies. In other words,
the focus here is to cover mainly WLL, WLAN, and WPAN systems. We begin with a
discussion on the general concepts of broadband wireless communication, and
then we delve into the enabling technologies of WLL such as MMDS, LMDS,
satellite communications, the newly developed IEEE standard 802.16,
HIPERACCESS, and so on. Next, we move on to WLAN technologies including IEEE
802.11a, 802.11b, and HIPERLAN. Finally, we depict the prominent WPAN systems
such as Bluetooth, IrDA, HomeRF, and the IEEE standards 802.15.3 and 802.15.4.
Material: Presentation
slides. Course handout.
·
In May/2002, we delivered a Short Course on Ad
Hoc and Sensor Networking at the 20th
Brazilian Symposium on
Computer Networks in
Title:
Authors: Carlos Cordeiro
and Dharma P. Agrawal
Goals: In this short course we focus on current protocols which provide
connectivity in mobile ad hoc networks. After beginning with an introduction to
the characteristics and challenges of mobile networks, we will delve into the technology
that makes these networks possible. Topics include Mobile IP, ad hoc unicast
protocols (including AODV, DSR, DSDV, and so on) and ad hoc multicast protocols
(including M-AODV and ODMRP). We also cover MAC protocols such as IEEE 802.11,
and Bluetooth, a solution for wireless personal area networking (WPAN), and
provide a clear view of the new promising emerging area of ad hoc networks
called Sensor networks. Through the presentation of several wireless mobile
technologies and further comparison among them illustrating their pros and
cons, we give the audience a broad understating of this field and which
technologies are likely to play a major role in the near future. Recent
research results are also discussed. We conclude this short course by discussing
current challenges to mobile networking that have not received as much
attention from the research community, and then highlighting some of the
current wireless protocol standardization efforts within the IETF and the
Bluetooth SIG (Special Interest Group).
Material: Presentation slides. Course handout.