A source and channel rate adaptation algorithm for AMR in VoIP using the Emodel
NOSSDAV '03 Proceedings of the 13th international workshop on Network and operating systems support for digital audio and video
ACM SIGCOMM Computer Communication Review
An E-Model Implementation for Speech Quality Evaluation in VoIP Systems
ISCC '05 Proceedings of the 10th IEEE Symposium on Computers and Communications
Very long distance wi-fi networks
Proceedings of the second ACM SIGCOMM workshop on Networked systems for developing regions
Measurement and Analysis of the VoIP Capacity in IEEE 802.11 WLAN
IEEE Transactions on Mobile Computing
Using cross-layer metrics to improve the performance of end-to-end handover mechanisms
Computer Communications
Modeling and Optimizing IEEE 802.11 DCF for Long-Distance Links
IEEE Transactions on Mobile Computing
Validation of the IEEE 802.11 MAC model in the ns3 simulator using the EXTREME testbed
Proceedings of the 3rd International ICST Conference on Simulation Tools and Techniques
Voice quality prediction models and their application in VoIP networks
IEEE Transactions on Multimedia
Experiences in using WiFi for rural internet in India
IEEE Communications Magazine
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In many rural and developing countries, the high cost of deploying and operating traditional telecommunications equipment mean that there are many areas that lack basic telecommunications infrastructure; this is further exacerbated by the low returns on investment that can be achieved. However, the increasing availability of low-cost femtocell equipment presents a potential solution. This paper investigates the feasibility of using long range WiFi as a backhauling solution for femtocell network deployments. Specifically, the number of high quality circuit switched AMR voice and packet switched AMR VoIP calls that can be supported via femtocells using long range WiFi backhauling is analysed. An adapted variant of the E-Model, which supports the AMR codec, is used to assess the end-to-end voice quality that would be achieved. In order to validate the obtained results both an analytical model and an NS-3 simulation based capacity analysis are presented, with both sets of results showing a high degree of correlation. The results show that a relatively large number of simultaneous AMR voice calls can be supported. This demonstrates the feasibility of using WiFi as a backhauling solution to deploy low-cost femtocell networks in areas were previously it has not been economically viable.