Ns is a discrete event simulator targeted at networking research. Ns provides substantial support for simulation of TCP, routing, and multicast protocols over wired and wireless (local and satellite) networks [Text from ns-2 official page]. nsRFIDsim implements a RFID module based on the EPCTM Radio-Frequency Identity Protocols Class-1 Generation-2 UHF RFID Protocol for Communications at 860 MHz ? 960 MHz Version 1.2.0(25/10/2008) standard for the ns-2 simulator, release 2.35. The focus of this implementation is the Network layer and its mechanisms for anti-collision.
To get more information, please visit the page http://ccsl.ime.usp.br/pt-br/rfid-module-ns-2-simulator