NLOS-TWS
Non-Line of Sight Television White Space Communication System
Television White Space refers to the unused broadcasting frequencies in the wireless spectrum. Television networks leave gaps between channels for buffering purposes, and this space in the wireless spectrum is similar to what is used for 4G and so it can be used to deliver widespread broadband internet.
What is Non Line of Sight Television White Space?
A NLOS (Non-line-of-sight) TVWS (Television Whitespace) Network, resides in the unused gaps between over-the-air television stations. The signals in these bands travel very well through trees and buildings just like TV signals do. A clear line of sight is not necessary. Depending on antenna height, terrain and bandwidth requirements, distances of up to 20 miles can be realized between the HUB and CLIENT terminals. User interface of phones, tablets or computers connect to the whitespace terminals through Wi-Fi, Ethernet and LTE depending on terminal configuration. A network consists of a HUB terminal which connects to a satellite internet provider and several CLIENT terminals which are linked to the HUB by terrestrial radio links. The user interface to the HUB and CLIENT terminals is by Wi-Fi, Ethernet or LTE so it has the look and feel of any local area network or LTE interface. The network automatically adjusts the bandwidth and power of each radio link to optimize the performance of the whole network and is based on user client priority. The terminals can be powered by local utility company power, solar, generator or vehicle power to ensure uninterrupted service. Depending on equipment configuration and the priority of the user, data speeds from 256kb to 20Mb can be realized.