dc.contributor |
Universitat Politècnica de Catalunya. Departament d'Enginyeria Telemàtica |
dc.contributor |
Zola, Enrica Valeria |
dc.contributor.author |
Martínez Navarro, Jesús |
dc.date |
2009-01-20 |
dc.identifier.uri |
http://hdl.handle.net/2099.1/6257 |
dc.language.iso |
eng |
dc.publisher |
Universitat Politècnica de Catalunya |
dc.rights |
Attribution-NonCommercial-ShareAlike 3.0 Spain |
dc.rights |
info:eu-repo/semantics/openAccess |
dc.rights |
http://creativecommons.org/licenses/by-nc-sa/3.0/es/ |
dc.subject |
Àrees temàtiques de la UPC::Enginyeria de la telecomunicació::Telemàtica i xarxes d'ordinadors::Xarxes d'àrea local |
dc.subject |
Àrees temàtiques de la UPC::Enginyeria de la telecomunicació::Radiocomunicació i exploració electromagnètica::Comunicacions mòbils |
dc.subject |
Wireless LANs |
dc.subject |
Mobile communication systems |
dc.subject |
Indoor models of movement |
dc.subject |
WLAN |
dc.subject |
NS-2 |
dc.subject |
Simulation |
dc.subject |
Xarxes d'àrea local sense fils (Xarxes d'ordinadors) |
dc.subject |
Comunicacions mòbils, Sistemes de |
dc.title |
Evaluation of the impact of mobility models on handover in WLAN indoor environments |
dc.type |
info:eu-repo/semantics/masterThesis |
dc.description.abstract |
Nowadays, mobility models are used to simulate realistic movements produced
by the users of a wireless or a mobile network.
The aim of this project is to evaluate the impact of mobility models on handover
process in Wireless Local Area Networks (WLAN) indoor environments, using
the network simulator NS-2.
This document contains a previous theoretical characterization of the basic
mobility models and their application in the network simulator NS-2, a study of
the infrastructure mode support and a modification of the current handover
algorithm.
The study focuses on two mobility models in WLAN indoor environments: one
where movements are completely random (i.e. Random Waypoint) and another
one where next step depends on previous movements (i.e. Gauss-Markov). In
order to support infrastructure mode operation in WLAN, a new patch with
modifications of the source code is applied. Furthermore, a first approach for
the development of a new handover algorithm is presented.
Simulations are run in two different scenarios: one with 4 Access Points (APs)
offering full coverage in the simulated area, and another one with 8 APs,
simulating overcoverage in order to guarantee higher capacity for a higher
density of users. Results are presented showing a comparative of the cell
residence time (CRT) for each scenario. From the results obtained, it is
possible to see that the CRT changes depending on the algorithm and the
mobility model applied, being lower when the Random Waypoint model is
applied. On the other hand, the new handover algorithm designed from the
current implementation leads to a decrease in the average CRT. |