Myoung-hun Han

Regional Route Maintenance Protocol Based on Local Pheromone Diffusion for Mobile Ad Hoc Networks

Route maintenance protocol has a tradeoff between the amount of control overhead and the provision of useful alternative paths. To break through this tradeoff, we consider a bio-inspired approach based on the natural phenomena of ant pheromone. The pheromone is accumulated on the shortest path between the nest and the food, and then diffused into its vicinity over time. Thus, the ants can find another route along this locally diffused pheromone when the shortest path in use is blocked. Based on this local pheromone diffusion and rerouting behavior, we propose a new route maintenance protocol for mobile ad hoc networks. First, pheromones (i.e., routing information) are locally diffused around the shortest path between the source and the destination (i) by overhearing at the one-hop neighbors from the shortest path and (ii) by sharing the overheard pheromone information among the one-hop neighbors. Thereafter, a probabilistic path exploration is executed within the one-hop region based on the locally diffused pheromone and so useful alternative paths around the shortest path are discovered. Through intensive simulations, we verify that the proposed regional route maintenance protocol outperforms the conventional routing protocols in terms of disruption frequency, delivery ratio, delay, and jitter, while reducing the control overhead.

Tactical MANET architecture for Unmanned Autonomous Maneuver Network

A MANET is a self-configuring ad hoc network that could be very useful for battlefield communication. Because of its versatility, Tactical Mobile Ad-hoc NETwork (MANET) is also widely used by modern military units especially for the autonomous maneuvering of unmanned vehicles and robots. But Quality of Service in Tactical-MANET is difficult because the network topology changes dynamically. The resource allocation scheme of MAC layer and load balancing of network layer can be critical factors in Tactical MANET. Without a QoS scheme, users might have difficulties in getting their service in Tactical MANET. In this paper we present the architecture of the MAC and Network layers of tactical MANET for Unmanned Autonomous Maneuver Network in order to provide better communication support in battlefield. It aimed to provide real-time streaming over a multi-hop ad hoc network with QoS support. The simulation results are presented to demonstrate the effectiveness of proposed scheme.