Department of Information Technology

Seminar series

Only one seminar will be running: Wireless sensor networks.


A seminar will comprise of one or two lectures delivered by the seminar instructor followed by an instance with student presentations. Attending and presenting in the seminars is mandatory to pass the course. The topics for the student presentations will be discussed and assigned during the second lectures. The presentation is preferably prepared by a team of two students. The instructor will recommend some references for the presentation and the presentation should last about ten minutes with 5 minutes for discussions. There will be a PC projector available.

The student presentations are scheduled for Nov 29.

The following advanced topics in wireless mobile networking will be offered in the form of seminars. (Check the schedule for time)

  • Wireless ad-hoc and mesh networks Will not be given this year

Wireless ad-hoc networks are networks where nodes do not depend on any central infrastructure (e.g., base-station, access point) for communication. Nodes within communication range of each other can communicate directly. Nodes that cannot communicate directly transfer data with the help of intermediate nodes that act as routers and forward data for one another. Nodes may be mobile, the topology of these networks may change, which makes it challenging to route and transport data in a reliable manner. If nodes are static, then such fixed multi-hop wireless networks are often termed as mesh networks that can be used to form wireless backbone where laying wired infrastructure is impractical.

  • Wireless sensor networks (Instructor: Adam Dunkels, SICS), Nov 22, 10-12 (Pol_1245) and Nov 23, 10-12 (Pol_1245); Student presentations: Nov 29 (13:00-15:00)

Recent advances in micro-electromechanical systems, embedded computing and wireless communications are converging towards future wireless miniature sensor systems. Smart and cheap micro sensor devices, ranging in size from cubic inches to cubic millimetres, each having multiple on-board miniaturized low-powered sensors can be deployed in small and large numbers (up to thousands) to instrument new scientific and societal applications: monitoring temperature, early detection of natural disasters like forest fires, monitoring pollution levels, detecting structural flaws and wildlife tracking, to name a few. Designing sensor networks opens up many research questions, e.g., localization, energy-efficiency, resource management, diffusion of sensor data, designing system software that fits in the limited memory.

  • Delay- and Disruption-tolerant networks Will not be given this year

There are many harsh and challenging environments, for example, deep space communication, digital content delivery in rural areas with under-developed infrastructure, wildlife and habitat monitoring, where communication network are typically characterized by disruption of communication links leading to frequent and long durations of network paritioning, long delays, limited resources and heterogeneity. Traditional networking solutions (based on TCP/IP) are not viable and even extensions such as ad hoc networking do not provide a definite solution since they need a reliable end-to-end path between a source and destination. Delay- an disruption-tolerant networking (DTN) is emerging as a solution for these challenging network environments. This area is relatively new and there is ongoing research to address open questions reagrding the network architecture, data transport, routing and forwarding, and congestion control, to name a few.

  • Applications over wireless mobile networks Will not be given this year

The unpredictable nature of the wireless channel and device mobility poses many challenges for real-time applications such VoIP and video streaming, as well as for reliable data services based on TCP. In this seminar we will address these challenges in different wireless networks (e.g., WiFi, Bluetooth, Cellular networks) and consider some of the solutions for quality of service provisioning and improving performance of data transport protocols such as TCP in these networks.

Updated  2007-11-08 00:11:23 by Per Gunningberg.