Broadband Technologies

Broadband Technologies

Introduction

High denotes a bandwidth or a frequency range which is very large, rather broad. In contrast to narrow band which is very small or narrow. The term broadband is usually more related to digital transmission methods, and transfer rates. A wide range is synonymous with a lot of transmission capacity. Particularly in the transmission of data is an important criterion. The more bandwidth, the more data can be transmitted per time unit. 

In the past, the demand for more bandwidth led to new transmission technologies. Because every time the transfer of technology must be rebuilt or replaced, it is now other way. Instead each time to install a new technique, we tried in the technical development for continuous small steps and go straight to exhaust the current technology to their physical limits.

Frequent broadband transmission technologies

DSL

ADSL

ADSL2

ADSL2 +

VDSL2

Cable modem technology

Powerline

Satellite

UMTS

WiMAX

PtP Ethernet

GPON

GEPON

Discussion

In particular, DSL is the synonym in Germany for high-speed Internet access and is provided almost exclusively by Deutsche Telekom. The regulatory authority in Germany is against the dominant position of Deutsche Telekom now proceeding sufficiently. You have to wait and see familiar position that access techniques, such as power line and cable technology, to prevail without problems. Since the laying of new lines is a costly affair, it was obvious to use existing networks. But, unfortunately, could not convince Powerline technology. And the cable operators are due to the complex structure cannot come fast enough on the market. The cable networks have been built in Germany at the time of the Bundespost. So this was a time long pipeline network owned by Deutsche Telekom. Meanwhile, the cable operators are caught and sometimes faster than the German Telekom's VDSL. Today, wireless technology is the future of broadband access networks. Especially in rural areas, there is a range of DSL is limited and does not reach every household. Since WLL is flopped, LTE is poised to eliminate the white spots or more areas on the broadband card. 

In the long term, the days are numbered of the copper cable - no matter whether it is used for ADSL, VDSL or cable TV. Fiber optic cable and radio are the technology of the future in order to realize broadband access.

Bandwidth requirements

Application

Data Rate

Chat

<1 kbit/s

Phone

16-80 kbit/s

Radio, MP3

32-320 kbit/s

Audio, uncompressed

1.5 Mbit/s

Surfing, e-mail

1-6 Mbit/s

TV (analog)

2-3 Mbit/s

DivX video

4-8 Mbit/s

DVD-Video

to 10 Mbit/s

HD-Video (1 channel)

6-8 Mbit/s

HD-TV (2 channels)

to 20 Mbit/s

Backup, remote data access

100-500 Mbit/s

As the first broadband Internet access were provided was interesting, especially the high speed. The high bandwidth and thus the high transfer rate promised to retrieve web pages within a fraction of a second. At a click, the site was immediately displayed. Internet users interested in then for the first time for new content such as audio and video. Thanks to the broadband video transmission over the Internet is no longer a problem. 

Over the past few years, the transmission speed of broadband connections has increased continuously. When DSL (ADSL), we are currently arriving at 16 Mbit/s, sometimes even 20 Mbit/s, with VDSL, even 25 or 50 Mbit/s. But usually nobody needs, let alone the general mass of customers, a broadband Internet connection with 50 Mbit/s. There is no application for a download rate of ...