Homework problem sets
SUBMISSION DEADLINE: 16:00, January 5, 2007
The homework solutions should be submitted to the seminar instructors by e-mail with a CC to Per Gunningberg and Kaustubh Phanse. Make sure to include your name on the homework solution.
Wireless ad-hoc and mesh networks (Seminar instructor: Laura Marie Feeney)
Wireless sensor networks (Seminar instructor: Thiemo Voigt)
(Ignore the Jan 13 deadline in this assignment.)
Delay- and disruption-tolerant networks (Seminar instructor: Kaustubh Phanse)
A seminar will comprise of one or two lectures delievered by the seminar instructor followed by an instance with student presentations. Attending and presenting in at least one of the seminars is mandatory to pass the course.
The student presentations are scheduled for Dec 4 and 5.
To attain a higher grade, you can do a homework assignment, which consists of two parts. In the first part, you should submit a written report (not more than 1.5 pages) that (a) summarizes the introductory lectures and presentations in the seminar, and (b) summarizes your own reflections about the topic (e.g., what you found most interesting and why, how applicable is the knowledge in real life, questions that you might want to raise). The weightage should be 40% for part(a) and 60% for part(b). In the second part, you will be assigned short questions to test your understanding of the seminar topic.
To be able to attain a grade of 4, you must submit answers for one homework assignment and to be able to attain a grade of 5, you must submit answers for two homework assignments. Note that you cannot do homework assignment based on the seminar that you presented in.
While solving a homework, you can discuss with other students, but the solution you submit must be your own work. Homework solutions should be submitted to the mailbox of Prof. Per Gunningberg, House 1, Floor 4. The strict deadline for submitting homework solutions is 16:00 on January 5, 2007. Late submissions will be silently ignored and will not be graded. You will get a passing grade on a homework assignment if your summary in part(a) is of acceptable quality and you obtain at least 50% of the points allocated for part(b).
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 (Instructor: Laura Marie Feeney), Nov 6 (Pol_1211) and Nov 7 (Pol_1212) ; Student presentations: Dec 4
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: Thiemo Voigt), Nov 10 (Pol_1212) and Nov 15 (Pol_1213) ; Student presentations: Dec 5 (10:00-12:00)
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 (Instructor: Kaustubh Phanse), CANCELLED!
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 (Instructor: Per Gunningberg), CANCELLED!
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.