In this paper, we analyze the performance of vertical handover (VHO) algorithms for seamless mobility between WiFi and UMTS networks. We focus on a no-coupling scenario, characterized by the lack of any form of cooperation between the involved players (users and network operators). In this “hostile” scenario, the VHO operations are completely operated by the mobile terminal (MT), and the network authentication procedures are unoptimized, leading to typically long handover times. In this context, we first propose a low-complexity Received Signal Strength Indicator (RSSI)-based algorithm and, then, an improved hybrid RSSI/goodput version. We present experimental results based on the implementation of a real testbed with commercial WiFi (Guglielmo) and UMTS (Telecom Italia) Italian deployed networks. Despite the relatively long handover times experienced in our testbed, the proposed RSSI-based VHO algorithm guarantees an effective goodput increase at the MTs. Moreover, this algorithm mitigates the ping-pong phenomenon. Our results show that, by using simple MT-driven VHO mechanisms, the users can benefit from redundant and heterogeneous wireless network infrastructures. This can be done by leveraging on pre-existing commercially deployed networks, without the need for any modification of them.

Vertical handover between WiFi and UMTS networks: experimental performance analysis / S., Busanelli; M., Martalo'; Ferrari, Gianluigi; G., Spigoni; N., Iotti. - In: INTERNATIONAL JOURNAL OF ENERGY, INFORMATION AND COMMUNICATIONS. - ISSN 2093-9655. - 2:1(2011), pp. 75-96.

Vertical handover between WiFi and UMTS networks: experimental performance analysis

FERRARI, Gianluigi;
2011-01-01

Abstract

In this paper, we analyze the performance of vertical handover (VHO) algorithms for seamless mobility between WiFi and UMTS networks. We focus on a no-coupling scenario, characterized by the lack of any form of cooperation between the involved players (users and network operators). In this “hostile” scenario, the VHO operations are completely operated by the mobile terminal (MT), and the network authentication procedures are unoptimized, leading to typically long handover times. In this context, we first propose a low-complexity Received Signal Strength Indicator (RSSI)-based algorithm and, then, an improved hybrid RSSI/goodput version. We present experimental results based on the implementation of a real testbed with commercial WiFi (Guglielmo) and UMTS (Telecom Italia) Italian deployed networks. Despite the relatively long handover times experienced in our testbed, the proposed RSSI-based VHO algorithm guarantees an effective goodput increase at the MTs. Moreover, this algorithm mitigates the ping-pong phenomenon. Our results show that, by using simple MT-driven VHO mechanisms, the users can benefit from redundant and heterogeneous wireless network infrastructures. This can be done by leveraging on pre-existing commercially deployed networks, without the need for any modification of them.
Vertical handover between WiFi and UMTS networks: experimental performance analysis / S., Busanelli; M., Martalo'; Ferrari, Gianluigi; G., Spigoni; N., Iotti. - In: INTERNATIONAL JOURNAL OF ENERGY, INFORMATION AND COMMUNICATIONS. - ISSN 2093-9655. - 2:1(2011), pp. 75-96.
File in questo prodotto:
File Dimensione Formato  
BuMaFeSpIo_IJEIC11.pdf

non disponibili

Tipologia: Documento in Post-print
Licenza: Creative commons
Dimensione 3.65 MB
Formato Adobe PDF
3.65 MB Adobe PDF   Visualizza/Apri   Richiedi una copia

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11381/2350983
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus ND
  • ???jsp.display-item.citation.isi??? ND
social impact