Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: The Village Telco project: a reliable and practical wireless mesh telephony infrastructure | Adeyeye and Gardner-Stephen EURASIP Journal on Wireless Communications and Networking 2011 2011 78 http content 2011 1 78 EURASIP Journal on Wireless Communications and Networking a springeropen Journal RESEARCH Open Access The Village Telco project a reliable and practical wireless mesh telephony infrastructure Michael Adeyeye1 and Paul Gardner-Stephen2 Abstract VoIP Voice over IP over mesh networks could be a potential solution to the high cost of making phone calls in most parts of Africa. The Village Telco VT is an easy to use and scalable VoIP over meshed WLAN Wireless Local Area Network telephone infrastructure. It uses a mesh network of mesh potatoes to form a peer-to-peer network to relay telephone calls without landlines or cell phone towers. This paper discusses the Village Telco infrastructure how it addresses the numerous difficulties associated with wireless mesh networks and its efficient deployment for VoIP services in some communities around the globe. The paper also presents the architecture and functions of a mesh potato and a novel combined analog telephone adapter ATA and WiFi access point that routes calls. Lastly the paper presents the results of preliminary tests that have been conducted on a mesh potato. The preliminary results indicate very good performance and user acceptance of the mesh potatoes. The results proved that the infrastructure is deployable in severe and under-resourced environments as a means to make cheap phone calls and render Internet and IP-based services. As a result the VT project contributes to bridging the digital divide in developing areas. Keywords WLAN Wireless mesh networks VoIP mesh potato Village Telco Rural telephony 1 Introduction The cost of making a call and sending an SMS in most parts of Africa is extremely high compared to Soft phones running on PDAs WiFi-enabled VoIP handsets and cell phones with WiFi capabilities already exist and as VoIP over WLAN becomes widespread it
