Simulación de redes inalámbricas en NS-2

Background: The Ad hoc networks are a new paradigm in wireless networks due to its dynamic characteristics and autoconFiguration, appear in response connectivity to different situations where additional to those offered by conventional networks such as protocols for efficient routing features are required, interoperability between mobile devices and properties as the changing role of the nodes within the network. Objective: The objective of this work is to generate different environments simulated in the Network Simulator 2 software, varying routing protocols, service and overall traffic to validate the performance of an Ad hoc network. Methods: A detailed description of the characteristics of the simulator and abstractions used to model each of the network elements is presented, highlighting the mobile node abstraction who acts as a router or terminal mobility attributes, energy consumption management protocols routing and coverage, simulating all network layers of a real system, reactive and proactive protocols routing are used as AODV and DSR, in the same way the FEBA protocol in Mesh networks. Result: To validate the performance of the scenarios one Mesh structure was used to evaluate the effect of multichannel redundancy, compared to traditional architectures in Ad hoc networks and the number of hops required for transmission is greater than the Mesh, which generates latency in communications, metrics improve with reactive protocols and increase redundancy. Generating dedicated for traffic produced by the services, improving considerably more than 5 times the performance of a conventional Ad hoc network channels. Conclusion: The NS-2 simulator open source is a vital tool for modeling and simulating networks of any type, with the advantage of being able to modify and create existing libraries to create simulated environments more realistic and responsive to a need for communications as it is in emergency situations