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2) Wake-up Radio for Wireless Sensor Networks:
Recent works on wireless sensor networks concentrate on configuration
protocols based on sleep-scheduling. For event-driven applications,
instead of scheduled operation, sensors may reside in deep sleep and
operate only when the monitored event occurs. Wake-up radio is an enabler
of this mode of operation. When an event occurs, the activated sensor
wakes up the surrounding nodes, then starts communicating the decision. A
typical example of event-driven WSN is the surveillance system whose duty
is intrusion detection in applications such as border monitoring against
penetration by hostile elements or perimeter protection. Dynamic
clustering, adressing spatio-temporal correlations of detections are some
typical application areas of the wake-up radio. Depending on the rate of
the events, utilization of the wake-up radio may become useless. If the
events occur frequently, some set of sensors have to sleep and wake up
frequently. Hence, for such scenarios switching to periodic sleep
scheduling is wiser. An example scenario can be the surveillance
application of museums. Assume that visitors of a historic arena is to be
monitored. The objective of the WSN is to detect the visitors whom are
trying to enter unallowed parts of the arena. During the open hours of the
museum, the rate of the events may be larger compared to the night shifts.
Daytime operation of the network can be based on periodic sleep
scheduling, whereas the night time operation can follow the wake-up
scheme. Rigorous analysis of when to switch from wake-up scheme to sleep
scheduling is required when such bi-modal operation is probable. Moreover,
the effect of the wake-up radio on the reporting delay (sensor-to-sink
event notification delay) must be analyzed. The MS student will survey the
wake-up radio technology, simulate and evaluate the performance of the
utilization of wake-up radio in sensor nodes and propose methods to reduce
the effect of delay introduced by the wake-up radio.
(Coadvised with Ilker Demirkol and Ertan Onur)
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Notes for Scaring the Unwilling and Lazy:
1. CmpE 475 or equivalent is a must 476/477/523/524 are strongly recommended.
2. Performance evaluation and implementation projects
will result in long working hours in NETLAB.
3. Willingness for hard work is a must since all
of these are difficult problems.