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RTDD: A Real-Time Communication Protocol for Directed Diffusion

In this paper, we propose Real-Time Directed Diffusion (RTDD), a real-time communication protocol for directed diffusion. Using the mechanisms provided by directed diffusion, we implement a prioritized scheduling policy over diffusion. With just a few extensions, RTDD significantly enhances the directed diffusion protocol, allowing time-critical flows to delivery more packets on time. We also propose two new scheduling policies which do not require location knowledge. We simulate RTDD in ns-2 and compare its performance to standard directed diffusion. Results show that RTDD delivers significantly more packets on time than directed diffusion alone.