MAC Protocol Used Progressive Reservation Mechanism in Ad hoc Networks

摘要

Guarantee to QoS for real-time traffic is the bottleneck to Ad hoc Networks' development. In the distributed network, packet contention is so high that nodes always fail to access channels in limited time. Although there are many protocols, for example FPRP, which could eliminate collision remarkably, they usually need a large quantity of control packets, which lead to high access delay. By studying dynamical slot-distribution MAC protocol, a protocol using progressive reservation mechanism for Ad hoc Networks was laid out, named PR-MAC. In the new protocol, nodes access channel by gradation, coordinated competition, and also the idle data slot is reconstructed to resolve the confliction. Therefore, PR-MAC possesses the merit of high utilization of resources, few data-packets collision, and low access delay; in addition, it can also support data traffic fine.