Mitigating Contention in Equal‐Priority Access

This chapter focuses on strategies deployed to mitigate contention between emitters of equal priority. It also focuses on multiple access and spread‐spectrum techniques as methods of contention mitigation. These techniques as used in the wireless coexistence standards are different from standards focusing on exclusive‐use. Wireless devices broadcast data using the electro‐magnetic spectrum as a medium. Each device is going to need access to such a spectrum resource in order to communicate. Wireless microphones operating in the TV band also present an interesting case of a primary user. The spectrum regulatory authorities of different nations have allocated certain segments of the spectrum for unlicensed use. Duplexing describes the ability for a node in a network to both transmit and receive. There are three general categories to duplexing: Simplex, HalfDuplex, and Full‐Duplex. Frequency Division Multiple Access and Time Division Multiple Access are two of the oldest and simplest multiple access techniques.