Wireless Wide Area Networks (WWANs)

WMAN technology allows users to make wireless connections between multiple locations within a metropolitan area (for example, between building different in a city or on the university campus), and this can be achieved without the cost of fiber optic or copper cables that are sometimes very expensive. In addition, WMAN can act as a backup for cable-based network and he will be active when the cable-based network that was experiencing problems. WMAN using radio waves or infrared light to transmit data. Broadband wireless access networks, which provides users with high-speed access, is much in demand today. Although there are several different technologies, such as multichannel multipoint distribution service (MMDS) and local multipoint distribution services (LMDS) in use today, but the working group for IEEE 802.16 broadband wireless access standards continue to make the specifications for these technologies

source : http://informatics-tools.blogspot.com/