Recent Progress on QoS Scheduling for Mobile Ad Hoc Networks

Abstract

Mobile ad hoc networks (MANETs) use algorithms that schedule transmissions in a fair and efficient manner. A multihop scheduler schedules transmissions so that the channel utilization is maximized while guaranteeing the quality of service (QoS) for all nodes. QoS-based scheduling in MANETs must be obtained under time-critical conditions as these networks have several features that produce unique queuing dynamics. Schedulers in MANETs take into account various QoS parameters such as end-to-end packet delay, packet delivery ratio, flow priority, etc. Also, scheduling in MANETs takes many forms such as distributed priority, fair, opportunistic, etc. This article provides a survey of scheduling techniques for MANETs and discusses the advantages and disadvantages of each category.