With the explosive growth in demand for wireless services, the next generation wireless networks are expected to provide solutions to cost-effective, ubiquitous, always-on broadband access. There has been a general consensus that developing network-level solutions that take advantage of the interplay between the physical-layer and the upper protocol layers would yield significant performance gains. Thus motivated, a common thread of this book is to study physical- layer aware control and optimization in stochastic wireless networks. Specifically, we want to obtain a fundamental understanding of the following issues: How can we take advantages of rich diversities such as time/multi-user/multi-channel degrees of freedom in wireless networks? How can we develop distributed algorithms of joint rate control and MAC design for end-to-end QoS provisioning? Are these distributed algorithms stable in the presence of stochastic noisy feedback? A principal objective of this book is to develop systematic frameworks for solving these issues.