TDM/TDMA

The TDM/TDMA network consists of a central earth station (Hub) and remote earth stations (Terminals). Hub is a central station of the network that manages all network Terminals and distributes the bandwidth accordingly to actual traffic load and predefined QoS. The Hub also acts as a gateway, concentrating and routing traffic of all network Terminals to/from external networks. The Hub consists of one or several UHP-1000 routers depending on the network size.

Hub constantly broadcasts common TDM channel (Outroute) dedicated to all network Terminals. Hub uses Time Division Multiplexing (TDM) to deliver data to a specific Terminal or to some group of Terminals. Such data consists of user traffic and network management commands.

Terminal - is network access equipment that interacts with the Hub in Hub/Spoke (Star) topology. Terminals constantly receive the Outroute channel broadcasted from the Hub and respond to the Hub via Time Divided Multiple Access (TDMA) carrier - Inroute. One or several Inroutes are shared between groups of Terminals. Each Terminal transmits its information as packets (burst) to individually-assigned time-slot determined by the Hub.