tailieunhanh - Báo cáo hóa học: " Research Article Experimental Evaluation of the Usage of Ad Hoc Networks as Stubs for Multiservice Networks"

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 Experimental Evaluation of the Usage of Ad Hoc Networks as Stubs for Multiservice Networks | Hindawi Publishing Corporation EURASIP Journal on Wireless Communications and Networking Volume 2007 Article ID 62967 14 pages doi 2007 62967 Research Article Experimental Evaluation of the Usage of Ad Hoc Networks as Stubs for Multiservice Networks Miguel Almeida Rafael Sarro Joao Paulo Barraca Susana Sargento and Rui L. Aguiar Instituto de Telecomunicaẹões Campus Universitario de Santiago 3810-193 Aveiro Portugal Received 1 July 2006 Revised 22 October 2006 Accepted 11 January 2007 Recommended by Marco Conti This paper describes an experimental evaluation of a multiservice ad hoc network aimed to be interconnected with an infrastructure operator-managed network. This network supports the efficient delivery of services unicast and multicast legacy and multimedia to users connected in the ad hoc network. It contains the following functionalities routing and delivery of unicast and multicast services distributed QoS mechanisms to support service differentiation and resource control responsive to node mobility security charging and rewarding mechanisms to ensure the correct behaviour of the users in the ad hoc network. This paper experimentally evaluates the performance of multiple mechanisms and the influence and performance penalty introduced in the network with the incremental inclusion of new functionalities. The performance results obtained in the different real scenarios may question the real usage of ad-hoc networks for more than a minimal number of hops with such a large number of functionalities deployed. Copyright 2007 Miguel Almeida 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 Nowadays user communication requirements are much more than simple connectivity it is required to assure full service connectivity with high quality independently of the user s location and