A Self Clocked Fair Queuing MAC Approach Limiting Deafness and Round Robin Issues in Directional MANET

The use of directional communications in Mobile Ad Hoc Networks (MANET) helps to overcome the most of undesired issues occurring at Medium Access Control (MAC) layer involved by omnidirectional antennas. Although, the employment of Directional Virtual Carrier Sensing (DVCS) techniques are not sufficient to limit decisively the deafness problem, the most recent approaches such as [1] exploiting Round-Robin principle help to enhance efficiency in reducing this issue. However, because these kinds of approaches employ queues for frame management, while considering to reduce the deafness through a Round-Robin scheduling approach, it is necessary also to address the most common issues implied by these strategies that are the waiting queue and the time slice problems. These problems, unfortunately, tend to considerably reduce benefits involved by a sectorized-queue based solution. In this paper a novel Self Clocked Fair Queueing MAC (SCFQ-MAC) approach is proposed with the goal to minimize the effects of the mentioned issue. By exploiting a SCFQ scheduling it is possible to reduce the average waiting time of frames in queues and consequently, to improve system performance especially in terms of fairness.