Development and implementation of a network coding module for NS3

Participants : Cédric Adjih, Ichrak Amdouni, Hana Baccouch.

DragonNet is a complete modular solution of network coding. This solution is responsible of coding, decoding, maintaining necessary information and the associated signaling. It is designed to be extensible. A variant of DragonNet was specified for wireless sensor networks and implemented.

As a follow-up to the ADT MOBSIM (and the previous module EyWifi), DragonNet was also integrated as a module for the NS-3 simulation tool.

Optimized Broadcast Scheme for Mobile Ad hoc Networks

Participants : Nadjib Achir, Paul Muhlethaler.

The main objective is to select the most appropriate relay nodes according to a given cost function. Basically, after receiving a broadcast packet each potential relay node computes a binary code according to a given cost function. Then, each node starts a sequence of transmit/listen intervals following this code. In other words, each 0 corresponds to a listening interval and each 1 to a transmit interval. During this active acknowledgment signaling period, each receiver applies the following rule: if it detects a signal during any of its listening intervals, it quits the selection process, since a better relay has also captured the packet. Finally, we split the transmission range into several sectors and we propose that all the nodes within the same sector use the same CDMA orthogonal spreading codes to transmit their signals. The CDMA codes used in two different sectors are orthogonal, which guarantees that the packet is broadcast in all possible directions. The obtained results demonstrate that our approach outperforms the classical flooding by increasing the delivery ratio and decreasing the number of required relays and thus the energy-cost.