Mobile offloading enables mobile devices to distribute computation-intensive tasks to the cloud or other devices for energy conservation or performance gains. In principle, the idea is to trade the relatively low communication energy expense for high computation power consumption. In this thesis, we first focus on the technique of mobile code offloading to the cloud by proposing the new technique of coalesced offloading, which exploits the potential for multiple applications to coordinate their offloading requests with the objective of saving additional energy on mobile devices. We then turn our attention to collaborative mobile computing where a group of mobile users with the common target job form coalitions to reduce the overall energy costs. We propose distributed collaboration strategies through game theory, and formulate the problem as a non-transferable utility coalitional game, and solve it by merge and split rules.M.A.S
