P. Venkata Krishna , S.N. Iyengar , A Cross Layer Based QoS Model for Wireless and Mobile Ad Hoc Networks, Journal of Mobile Communication, Volume 1,Issue 4, 2007, Pages 114-120, ISSN 1990-794x, jmcomm.2007.114.120, (https://makhillpublications.co/view-article.php?doi=jmcomm.2007.114.120) Abstract: The cross-layer design approach is an efficient procedure used to solve several open issues of mobile and wireless networks. Cross-layer design is used to share the information between layers and promotes adaptability at various layers based on information exchanged. However, such a design process needs to be carefully coordinated to avoid unintentional and undesirable consequences. The basic idea of cross layer approach is to overcome performance problems by allowing protocols belonging to different layers to cooperate and share network status information to maintain the Quality of Service. This study presents a QoS model based on cross layer concepts for Mobile and wireless environments. Keywords: Cross layer;services;mapping;QoS models;wireless