QoS Enhancement Through Link-Quality Prediction Using Signal-to-Noise Ratio in MANET

Due to the continuous and variable nature of ad hoc networks, the operations performed by the routing layer have a significant effect on the communication on these networks. Therefore, the most demanding QoS parameters must be implemented in the MANET environment to ensure the satisfactory performance of the network according to the user’s application requirements. So, the routing layer needs to use predictive techniques to react actively to the needs and anticipate the next probable action for stable communication. The quality of the link is reflected in the transmission time of the packet, which depends on the available transmission speed. Poor link quality needs the procedure of complex modulation and coding schemes, resulting in higher channel overhead. Aim of this chapter is to examine the challenges of QoS routing due to path loss, communication errors, and end-to-end delays. Later, it discusses the link state prediction approach and the accuracy of link quality using SNR. It suggests future research directions for improving QoS routing through enhanced link quality prediction.