Networking Research in Stony Brook University

mashpeemoveMobile - Wireless

Nov 24, 2013 (3 years and 6 months ago)

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Networking Research

in

Stony Brook

University

Faculty and Labs

Lab Name

Acronym

Experimental Computer
Systems Lab

ECSL

Wireless Networking and
Simulation Lab

WINGS

Media Networking Lab

MNL


Faculty:

Hussein Badr, Tzi
-
cker Chiueh,
Samir Das, Jie Gao, Himanshu Gupta,
Alex Mohr, Jennifer Wong.

Focus Areas


Wireless LAN


Wireless Ad Hoc and Mesh
Networks


Wireless Sensor Networks


Media Networking


Peer
-
to
-
peer Networking


Wireless

router

Mobile

host

Ad Hoc / Mesh Network

Mobile wireless

router/host

Ad Hoc / Mesh Network

Focus Areas


Wireless LAN


Wireless Ad Hoc and Mesh
Networks


Wireless Sensor Networks


Media Networking


Peer
-
to
-
peer Networking


Sensor Network

Focus Areas


Wireless LAN


Wireless Ad Hoc and Mesh
Networks


Wireless Sensor Networks


Media Networking


Peer
-
to
-
peer Networking


Wireless Interference Modeling
(Das)


Model wireless interference in an actual
deployed network.


Model network capacity based on
measurements.


Useful for many goals:


Routing


Channel assignment


Admission control for VoIP


Protocols and Algorithms for
Using Multiple Channels and
Directional Antenna

(Das and Gupta)


Use of multiple channels and directional
antennas improve wireless network
capacity.


Many directions: from MAC protocols to
topology control algorithms with
provable properties..


Integration with routing.

RFID Sensor Networks

(Das and Gupta)


Augment a sensor network with RFID
readers acting as sensors.


Efficient channel access with multiple
RFID readers.


Applications: activity recognition,
assisting blind people.

Carlsbad: Indoor Wireless Sensor
Network Platform (Chiueh)


Exploit commodity IEEE 802.11b WLAN access points
(Linksys WRT54G, < $30) as building blocks for indoor
wireless sensor network (WSN) applications


Use SNMP as the basic interaction protocol among
wireless sensor network nodes


Provide a SQL interface and distributed query
processing system to sensor data stored on WSN
nodes


Support
dynamic channel switching

to minimize
impacts of Carlsbad on enterprise LANs


First application: enterprise WLAN traffic and security
monitoring, including spoof detection

Voice over IP on IEEE802.11
-
based Wireless Mesh Network
(Chiueh)


Challenges:


Quality of service guarantee


Per
-
packet overhead


Solution:


A software
-
only MAC based on TDMA


Disable link
-
layer ACK, shrink contention window
to zero and batching of downstream packet


Result: allows a single IEEE 802.11b channel to
support more than
50

two
-
way G.729 VoIP
connections:
< 10

in commercial VoWLAN products

MiNT: Miniaturized High
-
Fidelity
Wireless Test
-
bed (Chiueh)


Use
radio signal attenuation

to reduce physical space
requirement


Wireless network node on Roomba robot


Vision
-
based robot motion control


Self
-
charging for 24x7 unmanned operation


Allow ns
-
2 code to run on MiNT without change


Support
re
-
configurable

initial multi
-
hop network
topology and
run
-
time mobility

during simulation


Next step: comprehensive wireless network
simulations on MiNT testbed

Topology Discovery in Sensor
Networks (Gao)


Given a network of sensor nodes deployed in
an
unknown

region without location
information, discover the
boundary nodes
.

Joint work with Yue Wang, Joe Mitchell, to appear in Mobicom’06.

Routing Around Holes (Gao)


Load balancing


Do not overload
nodes on the
boundary.



“Traffic road
system”.

Joint work with Shuki Bruck, Anxiao Jiang, Mobicom’05.