ABSTRACT
Ad hoc networks (AHNs) are a new type of wireless networks that can be established on the fly and without the need for infrastructure or centralized control. Mobile AHNs (MANETs), wireless sensor networks (WSNs), and wireless mesh networks (WMNs) are three prominent classes of AHNs. This chapter presents the challenges and difficulties associated with the problem of Quality of Service (QoS) routing in AHNs. A comprehensive and detailed literature review of the QoS routing schemes in these three classes of AHNs is presented. Different approaches are grouped according to many parameters with emphasis on similarities and differences among these approaches. The chapter provides a perspective of current and future directions of QoS routing in MANETs. QoS support in MANETs is different from QoS provisioning in other wire line or infrastructured wireless networks in the sense that free node mobility may easily result in service disruption or cause QoS guarantees violations.
