Wireless communications rely on access to radio spectrum. With a continuing proliferation of wireless applications and services, the spectrum resource becomes scarce. The measurement studies of spectrum usage, however, reveal that spectrum is being used sporadically in many geographical areas...

The development of secondary spectrum access raises numerous technical, institutional, and economic issues. Transaction costs of the market mechanism and potential interference from spectrum sharing are among the issues of concern. Both transaction costs and uncertainty due to interference must...

Citywide wireless fidelity (WiFi) offers an opportunity for municipalities and BISPs to break through the duopoly broadband market structure that is prevalent in the US. Although municipal WiFi offers low deployment cost, short building time, high capacity, and wide coverage, the competition...

Spectrum trading markets are of growing interest to many spectrum management agencies. They are motivated by their desire to increase the use of market-based mechanisms for spectrum management and reduce their emphasis on command and control methods. Despite the liberalization of regulations on...

Telecommunication regulators are facing increasing pressure to make spectrum resources more widely available to new wireless services and providers. In spectrum trading markets, buyers and sellers determine the assignments of spectrum and, possibly, its uses. These markets are being considered...

Much of the research in dynamic spectrum access (DSA) has focused on opportunistic access in the temporal domain. While this has been quite useful in establishing the technical feasibility of DSA systems, it has missed large sections of the overall DSA problem space. This paper argues that the...