Wireless Infrastructure less networks consist of wireless mobile nodes with
heterogeneous and constrained resources, to establish internet connectivity regardless of the
location. The applications the networks are disaster relief, health care and military. These
applications are sensitive, and demands the reliable, and best quality of communication.
Routing is one of the resources to enable the communication. Routing is acceptable in an
infrastructure less networks if it satisfies the quality of service requirements. Thus the paper
aims to investigate the existing QoS routing protocol performance in various conditions. The
aim is to achieve a broad understanding of QoS routing protocol designed for Wireless
Infrastructure less networks, and further pave the pathway for future research. The paper
analyses the QoS routing protocol performance in presence of bottleneck intermediate node,
and it is the novel aspect of the work.