tailieunhanh - Báo cáo hóa học: " Editorial Opportunistic and Delay-Tolerant Networks Sergio Palazzo,1 Andrew T. Campbell,2 and Marcelo Dias de Amorim3"

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: Editorial Opportunistic and Delay-Tolerant Networks Sergio Palazzo,1 Andrew T. Campbell,2 and Marcelo Dias de Amorim3 | Hindawi Publishing Corporation EURASIP Journal on Wireless Communications and Networking Volume 2011 Article ID 164370 2 pages doi 2011 164370 Editorial Opportunistic and Delay-Tolerant Networks Sergio Palazzo 1 Andrew T. Campbell 2 and Marcelo Dias de Amorim3 1 University of Catania Catania Italy 2Dartmouth College Hanover NH 03755 USA 3 UPMC Sorbonne Universites 75005 Paris France Correspondence should be addressed to Sergio Palazzo palazzo@ Received 18 January 2011 Accepted 18 January 2011 Copyright 2011 Sergio Palazzo 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. Today people predominately rely on the Internet and cellular network as well as the plain old telephone system to communicate with each other. Typically these communication services are built from fixed wired or wireless infrastructure where the next hop is known in advance well engineered and its performance in terms of delay throughput and loss characteristics has been well studied. Over the last decade a new paradigm in end-to-end communications has emerged mostly in academia and industrial research laboratories based on the notion that the next hop between a sender and receiver is not known in advance. These networks typically called opportunistic and delay-tolerant networks are characterized as opportunistic because like nodes in mobile ad hoc networking infrastructure the forwarding nodes are mobile and dynamic they come and go in unpredictable ways. In this case it is very hard to make strong statements about the type of service opportunistic networks will offer the user. Opportunistic nodes collectively form dynamic networks that are built from short unpredictable contact times as nodes move in and out of connectivity. Unlike mobile ad hoc networks which aim to offer a frequently available connected path