A Survey of Data Forwarding Techniques for Data Collection in Wireless Sensor Networks

PhD Qualifying Examination


Title: "A Survey of Data Forwarding Techniques for Data Collection in
Wireless Sensor Networks"

by

Mr. Zhichao Cao


Abstract:

Data collection is one of the most important applications in wireless 
sensor networks. In this scenario, there is a central sever as sink. All 
other sensor nodes transmit their data packets to sink by multi-hop 
forwarding. The reliable and efficient delivery is subject to several 
factors. For example, link dynamics might cause packet loss or loop. The 
energy cost and transmission delay of one-hop forwarding are different in 
diverse media access mechanisms. Data forwarding is thus a critical and 
challenge issue for data collection in wireless sensor networks.

In this survey, we discuss the existing data forwarding techniques for 
data collection and present a new taxonomy of them. Based on different QoS 
metrics concerned, routing protocols are classified into five categories: 
fairness, reliability, throughput, transmission delay, and energy 
consumption. We also discuss the potential design space of data 
forwarding, particularly on the direction of QoS metric optimization under 
unsynchronized low duty cycle media access model. In this model, nodes in 
a local area will not access media simultaneously. Without sleep schedule 
of neighbors, the long waiting time could degrade the energy and delay 
efficiency. On the other hand, the unsynchronized media access model could 
provide extremely low duty cycle and it does not need the overhead of 
synchronization. Thus the corresponding forwarding technique needs to be 
reconsidered.


Date:                   Monday, 18 April 2011

Time:                   3:30pm - 5:30pm

Venue:                  Room 3402
                         lifts 17/18

Committee Members:	Dr. Yunhao Liu (Supervisor)
                         Prof. Lionel Ni (Chairperson)
 			Dr. Lei Chen
 			Prof. Bo Li


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