ABSTRACT
Until recently, the research into wireless networks concentrated only on single-hop wireless networks. The number of simultaneous users and the volume of data communicated over wireless networks have driven the need for high-capacity wireless networks. This chapter examines some of the recent architectures that have been proposed to enhance the capacity of wireless networks by improving spectrum reuse through ad hoc radio relaying. Such next-generation wireless network architectures that fuse the properties of ad hoc networking into the existing infrastructure-based wireless networks point to the fact that ad hoc networking will be an essential feature of next-generation systems. We describe the design of each architecture, identify its pros and cons, and brief the open issues that should be addressed in such architectures.
