ETD system

Electronic theses and dissertations repository

 

Tesi etd-04202012-084326


Thesis type
Tesi di laurea specialistica
Author
FUSINI, LORENZO
URN
etd-04202012-084326
Title
Performance analysis of an underwater acoustic network
Struttura
INGEGNERIA
Corso di studi
INGEGNERIA DELLA AUTOMAZIONE
Commissione
relatore Prof. Caiti, Andrea
Parole chiave
  • uan
  • uan11
  • underwater
  • acoustic
  • network
  • sintef
Data inizio appello
11/05/2012;
Consultabilità
parziale
Data di rilascio
11/05/2052
Riassunto analitico
This thesis aims at analysing some of the many data collected during the final sea trial of the UAN11 project (Underwater Acoustic Network) in the Trondheim fjord, Norway. The objective is to check how conditions of the underwater acoustic channel affected communications, namely ping sequences, between specific nodes and, in those periods of time when good conditions were associated with bad communication results, try to find the reason why. The available ping results were fetched and used to identify periods of time with good or bad communications between the master node and other fixed or mobile nodes: such results were compared with the channel impulse responses stored, record by record, in the acoustic modems logfiles. Whenever ping results and channel conditions did not match, the upper communications levels (UANtun and MOOS) were analysed to try and find at which point the system failed. The matching was generally positive, but sometimes a favourable acoustic channel delivered bad ping results: a deeper analysis showed that apparently a traffic overload of the UANtun level was the cause for lost pings.
File