Dynamic Spectrum Leasing in Cognitive Radio Networks

Dynamic spectrum leasing (DSL) refers to the dynamic spectrum sharing (DSS) approach in which primary users proactively facilitate the spectrum access by secondary cognitive radios. Similar to DSA, DSL‐based spectrum coexistence can also be achieved in the form of either spectrum underlay or spectrum overlay. In DSL, primary users dynamically adjust the extent to which they are willing to lease their spectrum. In return, they receive a leasing payment, called a reward or a payback, that is proportional to the amount of allowed spectrum access. This chapter discusses example DSL implementations based on both types of leasing paybacks. Both of them can be implemented either as spectrum underlay or spectrum interweave. Hence, the chapter discusses one type of leasing paybacks in the context of an underlay network and the other in the context of a spectrum overlay network.