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: Research Article Challenges in Second-Generation Wireless Mesh Networks | Hindawi Publishing Corporation EURASIP Journal on Wireless Communications and Networking Volume 2008 Article ID 274790 10 pages doi 2008 274790 Research Article Challenges in Second-Generation Wireless Mesh Networks Roger P. Karrer 1 Antonio Pescape 2 and Thomas Huehn1 1 Deutsche Telekom Laboratories Technical University of Berlin 10587 Berlin Germany 2 Dipartimento di Informatica e Sistemistica Universita degli Studi di Napoli Federico II 80125 Napoli Italy Correspondence should be addressed to Roger P. Karrer Received 25 January 2008 Accepted 7 August 2008 Recommended by Jong Hyuk Park Wireless mesh networks have the potential to provide ubiquitous high-speed Internet access at low costs. The good news is that initial deployments of WiFi meshes show the feasibility of providing ubiquitous Internet connectivity. However their performance is far below the necessary and achievable limit. Moreover users subscription in the existing meshes is dismal even though the technical challenges to get connectivity are low. This paper provides an overview of the current status of mesh networks deployment and highlights the technical economical and social challenges that need to be addressed in the next years. As a proof-of-principle study we discuss the above-mentioned challenges with reference to three real networks i MagNets an operator-driven planned two-tier mesh network ii Berlin Freifunk network as a pure community-driven single-tier network iii Weimar Freifunk network also a community-driven but two-tier network. Copyright 2008 Roger P. Karrer et al. This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use distribution and reproduction in any medium provided the original work is properly cited. 1. INTRODUCTION Wireless networks have the potential to realize the longstanding vision of ubiquitous high-speed Internet access. Therefore they may revolutionize society in the
