Key words to describe this work: Network Simulator/Emulator, Heterogeneous Network

Key Results: This paper proposes a novel framework for a wireless network simulator/emulator. A complex wired network is simulated at individual Linux PC by reusing the real Linux TCP/IP stack. Then, traffic from simulated host is redirected to a wireless proxy for heterogeneous networks emulation. Links features, router setting, TCP parameters and MTU are readily adjusted. Modules of different queuing disciplines are also involved inside the emulator. How does the work advance the state-of-the-art?: An network emulator with a simple architecture but designed for complex network topologies, can enhance the accuracy of simulated future wireless and heterogeneous researches. Motivation (Problems addressed): Wireless features like quick handover, radio jamming and dynamic data rates cannot be truthful presented inside the simulator, but concentrates on all layers above the physical layer. Previous network emulators were designed for wired network or router relative emulations. A complex network topology is not easy to be constructed and integrated. Developing new modules are also a challenging job based on previous emulators ' framework