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 OMNeT++-Based Cross-Layer Simulator for Content Transmission over Wireless Ad Hoc Networks | Hindawi Publishing Corporation EURASIP Journal on Wireless Communications and Networking Volume 2010 Article ID 502549 12 pages doi 2010 502549 Research Article OMNeT -Based Cross-Layer Simulator for Content Transmission over Wireless Ad Hoc Networks R. Massin C. Lamy-Bergot C. J. Le Martret and R. Fracchia EDS SPM and SEA Departments Thales Communications Colombes 92704 France Correspondence should be addressed to R. Massin Received 1 June 2009 Accepted 24 November 2009 Academic Editor Nikos Passas Copyright 2010 R. Massin 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. Flexbility and deployment simplicity are among the numerous advantages of wireless links when compared to standard wired communications. However challenges do remain high for wireless communications in particular due to the wireless medium inherent unreliability and to the desired flexibility which entails complex protocol procedures. In that context simulation is an important tool to understand and design the protocols that manage the wireless networks. This paper introduces a new simulation framework based on the OMNeT simulator whose goal is to enable the study of data and multimedia content transmission over hybrid wired wireless ad hoc networks as well as the design of innovative radio access schemes. To achieve this goal the complete protocol stack from the application to the physical layer is simulated and the real bits and bytes of the messages transferred on the radio channel are exchanged. To ensure that this framework is reusable and extensible in future studies and projects a modular software and protocol architecture has been defined. Although still in progress our work has already provided some valuable results concerning cross layer HARQ MAC protocol performance and video .
