ABSTRACT
In recent times, wireless local area networks (WLAN) technology based on the 802.11 family has become a resource in solving communication needs in multiple applications. Some of the applications that have gained momentum
CONTENTS
6.1 Wireless Local Area Networks in Fixed Mobile Convergence Scenarios ..................................................................................................... 151 6.1.1 Enterprise-Based Architecture .................................................... 152 6.1.2 Unlicensed Mobile Access ............................................................ 152 6.1.3 SIP/WiFi Architecture ................................................................... 153
6.2 Conversational Services and Wireless Network Planning .................. 153 6.3 Subjective Quality Assessment for Conversational Services .............. 156
6.3.1 Voice Over IP Quality Estimation Model ................................... 158 6.3.2 Video Over IP Quality Estimation Model .................................. 161
6.4 WLAN Planning Principles Oriented to Data Services ....................... 166 6.5 WLAN Planning Based on Conversational Services Quality
of Service ..................................................................................................... 176 6.5.1 WLAN Quality of Experience Design Process: Contention
Mechanism and Delay .................................................................. 177 6.5.2 WLAN Quality of Experience Design Process: Automatic
Rate Selection and Packet Losses ................................................ 180 6.6 Conclusions and Future Work ................................................................. 186 Acknowledgments .............................................................................................. 186 Appendix 6.A: Default Values in VoIP and Multimedia QoE
Assessment Procedures .......................................................... 187 Appendix 6.B: Packet Error Rate Assessment in IEEE802.11 ...................... 188 References ............................................................................................................. 189
are those related to the communications that not only transport LAN data or web type Internet access, but also mainly IP-based voice and video. This is possible because of the availability of proprietary and standardized (IEEE802.1le) techniques for trafc prioritization. This circumstance has enabled the possibility to have not only WLAN-based handhelds, but also dual-mode terminals including cellular and WLAN.
