Achieve load balancing and avoid bandwidth fragmentation in MANET QoS routing

This paper presents a new approach of integrating prioritized admission control into QoS routing to achieve load balancing and avoid bandwidth fragmentation in mobile ad hoc networks (MANETs). As a crucial part of this new approach, the prioritized admission control algorithm is defined to give preference to high-bandwidth connections. An algorithm named bandwidth upper bound with dynamic dropping probability (BUB-DDP) is proposed and investigated as an example of prioritized admission control algorithm in this paper. Because this algorithm is nonlinear and unsolvable by conventional mathematical approach, we employ OPNET simulation to study its performance. The simulation results demonstrate that BUB-DDP can control traffics of different bandwidth requirements effectively, and by combining it with MANET QoS routing protocol, the mission of achieving load balancing and avoiding bandwidth fragmentation can be accomplished successfully