Memorias de investigación
Research Publications in journals:
Dimensioning Method for Conversational Video Applications in Wireless Convergent Networks
Year:2008

Research Areas
  • Processing and signal analysis

Information
Abstract
New convergent services are becoming possible, thanks to the expansion of IP networks based on the availability of innovative advanced coding formats such as H.264, which reduce network bandwidth requirements providing good video quality, and the rapid growth in the supply of dual-mode WiFi cellular terminals. This paper provides, first, a comprehensive subject overview as several technologies are involved, such as medium access protocol in IEEE802.11, H.264 advanced video coding standards, and conversational application characterization and recommendations. Second, the paper presents a new and simple dimensioning model of conversational video over wireless LAN. WLAN is addressed under the optimal network throughput and the perspective of video quality. The maximum number of simultaneous users resulting from throughput is limited by the collisions taking place in the shared medium with the statistical contention protocol. The video quality is conditioned by the packet loss in the contention protocol. Both approaches are analyzed within the scope of the advanced video codecs used in conversational video over IP, to conclude that conversational video dimensioning based on network throughput is not enough to ensure a satisfactory user experience, and video quality has to be taken also into account. Finally, the proposed model has been applied to a real-office scenario.
International
Si
JCR
No
Title
EURASIP journal on wireless communications and networking
ISBN
1687-1472
Impact factor JCR
0
Impact info
Volume
2008
10.1155/2008/328089
Journal number
14
From page
45
To page
58
Month
DICIEMBRE
Ranking
Participants

Research Group, Departaments and Institutes related
  • Creador: Grupo de Investigación: Microondas y Radar
  • Departamento: Señales, Sistemas y Radiocomunicaciones
  • Departamento: Ingeniería de Sistemas Telemáticos