networking research in stony brook university

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Networking Research in Stony Brook University

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Networking Research in Stony Brook University. Faculty and Labs. 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 - PowerPoint PPT Presentation

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Page 1: Networking Research  in  Stony Brook University

Networking Research in

Stony BrookUniversity

Page 2: 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.

Page 3: Networking Research  in  Stony Brook University

Focus Areas

• Wireless LAN

• Wireless Ad Hoc and Mesh Networks

• Wireless Sensor Networks

• Media Networking

• Peer-to-peer Networking

Page 4: Networking Research  in  Stony Brook University

Wireless router

Mobile host

Ad Hoc / Mesh Network

Page 5: Networking Research  in  Stony Brook University

Mobile wireless router/host

Ad Hoc / Mesh Network

Page 6: Networking Research  in  Stony Brook University

Focus Areas

• Wireless LAN

• Wireless Ad Hoc and Mesh Networks

• Wireless Sensor Networks

• Media Networking

• Peer-to-peer Networking

Page 7: Networking Research  in  Stony Brook University

Sensor Network

Page 8: Networking Research  in  Stony Brook University

Focus Areas

• Wireless LAN

• Wireless Ad Hoc and Mesh Networks

• Wireless Sensor Networks

• Media Networking

• Peer-to-peer Networking

Page 9: Networking Research  in  Stony Brook University

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

Page 10: Networking Research  in  Stony Brook University

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.

Page 11: Networking Research  in  Stony Brook University

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.

Page 12: Networking Research  in  Stony Brook University

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

Page 13: Networking Research  in  Stony Brook University

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

Page 14: Networking Research  in  Stony Brook University

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

Page 15: Networking Research  in  Stony Brook University

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.

Page 16: Networking Research  in  Stony Brook University

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.