MDSA Rack Components
Terrestrial Broadband System
MDSA Technology MPEG2 DVB High-Speed Internet)
How It Works (at a glance)
From a transmission point of view, data is transmitted in a similar fashion as the television terrestrial broadcasting method. The MPEG-2 DVB Internet Radio Server consists of a number of components that carry out various functions ranging from IP encryption to authentication. It is a turnkey system and no extra equipment is needed to provide high-speed internet access.
The system is designed with general Internet use in mind. This means that the MDSA Technology architecture is asymmetric in design, where the downstream channel has a much higher bandwidth allocation (faster data rate) than the upstream. This asymmetric network design is derived primarily from the asymmetric nature of Internet usage. Activities such as surfing the web send much more data down to the user as opposed to the user uploading data to the network. Mouse clicks (URL requests) and e-mails are not bandwidth intensive in the upstream direction. Image files, streaming media and audio files such as MP3's are bandwidth intensive in the downstream direction.
At the subscriber end, an MDSA Technology modem will be needed. This will typically have two connections: one to the antenna, the other to the computer. Users log on to the Internet via the usual PSTN/ISDN modem through their local ISP. They then receive an IP address (dynamic or static) from the ISP. Using this IP address, the driver logs on to the MDSA Technology network, and communication parameters are set for the session. The user will communicate to the ISP via the PSTN/ISDN line, but information downlink will be provided via the high-speed MDSA Technology transmitter.
The MDSA Technology enables data delivery to end users at speeds exceeding 7 Mbps for each FTP session. Currently the total speed available is 60 Mbps per transmitter. This is remarkable considering the delivery speeds of other distribution channels.
To give you a better idea of MDSA Technology capabilities, consider the following example.
The time a 25 Mb file takes to download will be:
- 30 Kbps modem connection = 140 minutes
- ISDN = 70 minutes
- T1 = 3 minutes
- MDSA Technology System = 30 seconds
The system is designed with general Internet use in mind. This means that the MDSA Technology architecture is asymmetric in design, where the downstream channel has a much higher bandwidth allocation (faster data rate) than the upstream.