Do we really need A Priori Link Quality Estimation?

Do we really need A Priori Link Quality Estimation?

Vasilopoulos, V.

Zúñiga Zamalloa, M.A. (mentor)

Electrical Engineering, Mathematics and Computer Science

Software and Computer Technology

Embedded Systems

2013-08-13

Traditionally, link quality estimation (LQE) has been viewed as an a priori step in sensor network routing protocols because it filters out unreliable links before data transmission. Recent results, however, show that protocols can perform well without a priori LQE. Because getting rid of LQE seems rather counter-intuitive, the aim of this work is to look deeper into the behavior of LQE-free protocols. Our results, based on one of the state-of-the-art LQE-free protocols, show two interesting insights. First, LQE-free protocols manage to choose links that are slightly better than the ones obtained with a priori LQE methods. Second, in traditional protocols, the effort needed to identify good links accounts for 40% to 60% of the energy consumption of nodes. By eliminating this overhead, LQE-free protocols can save a significant amount of energy compared to standard approaches. On the other hand, clear downsides of LQE-free operation are the longer paths and the worse load balance. The latter poses a higher transmission burden on some nodes.

Link Quality Estimation
Data Collection
Routing
Collection Tree Protocol
Broadcast-Free Collection Protocol
Wireless Sensor Networks

http://resolver.tudelft.nl/uuid:d78723a9-7b4f-4d3a-a568-c0d7d14a1632

2013-08-31

Student theses

master thesis

(c) 2013 Vasilopoulos, V.