The cloud computing is the dynamic provisioning of IT capabilities such as hardware, software or services, from third parties over a network. Resource sharing in the cloud Computing environment is the major issues that limited application of the cloud computing. The problem of enabling effective peer-to-peer resource sharing in this types of networks the availability of a wireless infrastructure and broadcast nature of wireless communication. Which bring to the notions of location awareness and MAC layer cross-layering. Through extensive packet-level simulations, I have investigated the separate effects of location awareness and MAC layer cross-layering, the performance of the P2P application. The combined protocol Optimizing Resource Sharing In Cloud Computing (ORSCC), reduces message overhead of as much as 40 percent with respect to the existing design, while at the same time improving the information retrieval performance. Notably, differently from the existing design, our proposed ORSCC specialization displays information retrieval performance resilient to the presence of both CBR and TCP background traffic. © 2011 Springer-Verlag.