d Hoc中结合位置信息的计数器广播算法

In the mobile ad hoc network(MANETs), Broadcast is an important tool for route discovery, source paging and information diffusion. However, flooding as a simple and effective solution to broadcast may cause high redundancy, contentions and collisions of packets, a phenomenon referred to as broadcast storm. Counter-based and position-based solutions can avoid blind flooding to some extent. However, the uniformity aroused by constant threshold value and unconcern of the neighbour topology in both schemes causes a low performance efficiency. PCB (Position-aware Counter-based Broadcast), an algorithm that integrates the merits of counter-based and position-based schemes is proposed. Within PCB, threshold of EAC and counters vary adaptively according to network density. We carry out a full-scale simulation study on the NS2 simulator. Compared with position-based or counter-based algorithm, it shows that PCB has a better performance.