RAACM: Resource Allocation for Admission Control in MANET

摘要

As wireless mobile network becomes widespread, the demand for user application is higher and the services provided by the wired application is expected to be available in the wireless medium. Therefore, the users of these applications will expect the same quality of service (QoS) obtained in wired network. Providing a reliable QoS in wireless medium, especially mobile ad-hoc network (MANET), is quite challenging and remains an ongoing research trend. The key issue of MANET lies around the ability to accurately predict the needed and available resources to avoid interference with ongoing traffic. An essential solution to the issues posed by MANET is the introduction of an admission control component for a guaranteed QoS. Admission control helps to control the usage of resources when an additional service is requested. For an admission decision to be made for a new flow, the expected bandwidth consumption must be correctly predicted prior to admission, notwithstanding the fact that wireless medium is shared and nodes contends among themselves to access the medium. The novelty of this research work is the proposed resource allocation for admission control in MANET (RAACM) solution which is an admission control scheme that estimates the available bandwidth needed within a network using a robust and accurate resource estimation technique. Furthermore, the various factors that must be considered for an effective estimation were highlighted and simulations were carried out. Results obtained show that our proposed scheme for MANET outperforms existing state-of-the-art approaches for admission control with bandwidth estimation. Part of this success is associated with its assumption about the idle channel period, which prevents the overestimation and underestimation of the existing bandwidth measurement. RAACM considers the dependency of two adjacent node idle channel occupancy by differentiating the networks BUSY state from the SENSE BUSY state and the IDLE state caused by an empty queue to give a better estimation.