This book is
about cognitive radio (CR), a revolution in radio technology and an enabling
technology for dynamic spectrum access. Due to the unique characteristics of
the wireless networks, it is essential to address the approach of multiple layers
(e.g., physical, link, and network) to maximize the network performance.
The formulation
of this cross-layer problem is usually complicated and challenging, while
wireless resource allocation is a vital way to handle the race condition of the
limited wireless resources. However, given the intrinsic characteristics of
cognitive radio networks (CRN), none of the existing analytical approach could
be a direct fit. Therefore, innovative theoretical results, along with the
corresponding mathematical techniques, are necessary. In this book, we aim to
develop some novel algorithmic design and optimization techniques that provide
optimal or near-optimal solutions.
Although
cross-layer design has been introduced to CRN for many years, there are rarely
any books for researchers, engineers, and students, from the engineering perspective.
From one hand, most of the existing books primarily focus on the mathematical
and economic aspects, which are considerably different from the engineering. On
the other hand, all of the books mainly aim to system optimization or control
techniques, while the cross-layer algorithm design in the distributed
environment is usually ignored. As the result, there is an urgent demand for a
reference source, which can provide complete information on how to fully adopt
cross-layer resource allocation to the CRN.
In this regard,
this book not only focuses on the description of the main aspects of cross-layer
resource allocation over CRN, but also provides a review of the application
solutions. In a nutshell, it provides a specific treatment of cross-layer
design in CRN. The topics range from the basic concepts of cross-layer resource
allocation, to the state-of-the-art analyses, modelings, and optimizations for
CRN.