本文件规定了由具有固定和便携式用户终端的专业固定基站（BS）组成的点对多点和回程无线区域网（WRAN）的空中接口，包括认知无线电介质访问控制层（MAC）和物理层（PHY）。该文件规定了允许频谱共享的频段中的操作，其中通信设备可能会在主要服务的频谱中操作，例如54 MHz至862 MHz之间的VHF/UHF电视广播频段，以及1300 MHz至1750 MHz和2700 MHz至3700 MHz频段，前提是监管制度允许。

This document specifies the air interface, including the cognitive radio medium access control layer (MAC) and physical layer (PHY), of point-to-multipoint and backhaul wireless regional area networks (WRANs) comprised of a professional fixed base station (BS) with fixed and portable user terminals. The document specifies operation in the bands that allow spectrum sharing where the communications devices may opportunistically operate in the spectrum of the primary service, such as the VHF/UHF TV broadcast bands between 54 MHz to 862 MHz, and the 1300 MHz to 1750 MHz and 2700 MHz to 3700 MHz bands provided the regulatory regime allows it.