BROADCOM
When people talk about wireless technologies, they tend to think about broadband cellular wireless networks like 5G and WiFi, which offers local area wireless connections. The truth is that most people do not really know (nor do they care) much about the differences between how each technology works.
They just want to know if they have reception that allows them to connect to a network and that they can get to the information, content, or services that they want. If you are the type of person who's reading a column like this, however, you probably do have at least a passing interest in how the technologies powering these different types of networks are related.
Those questions are particularly relevant now, thanks to the latest additions to the WiFi standard, WiFi6 and WiFi6E. Several of the underlying technologies powering these new networks are very similar to, or in some cases even the same as, ones used for 5G networks....Continue reading….
By: Bob O'Donnell
Source: New WiFi 6E Standard Brings 5G-Related Technologies To Local Area Wireless
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In telecommunications, a broadband signalling method is one that handles a wide band of frequencies. "Broadband" is a relative term, understood according to its context. The wider (or broader) the bandwidth of a channel, the greater the data-carrying capacity, given the same channel quality.
In radio, for example, a very narrow band will carry Morse code, a broader band will carry speech, and a still broader band will carry music without losing the high audio frequencies required for realistic sound reproduction. This broad band is often divided into channels or "frequency bins" using passband techniques to allow frequency-division multiplexing instead of sending a higher-quality signal.
In data communications, a 56k modem will transmit a data rate of 56 kilobits per second (kbit/s) over a 4-kilohertz-wide telephone line (narrowband or voiceband). In the late 1980s, the Broadband Integrated Services Digital Network (B-ISDN) used the term to refer to a broad range of bit rates, independent of physical modulation details.
The various forms of digital subscriber line (DSL) services are broadband in the sense that digital information is sent over multiple channels. Each channel is at a higher frequency than the baseband voice channel, so it can support plain old telephone service on a single pair of wires at the same time.
However, when that same line is converted to a non-loaded twisted-pair wire (no telephone filters), it becomes hundreds of kilohertz wide (broadband) and can carry up to 100 megabits per second using very high-bit rate digital subscriber line (VDSL or VHDSL) techniques.
Modern networks have to carry integrated traffic consisting of voice, video and data. The Broadband Integrated Services Digital Network (B-ISDN) was designed for these needs. The types of traffic supported by a broadband network can be classified according to three characteristics:
- Bandwidth is the amount of network capacity required to support a connection.
- Latency is the amount of delay associated with a connection. Requesting low latency in the quality of service (QoS) profile means that the cells need to travel quickly from one point in the network to another.
- Cell-delay variation (CDV) is the range of delays experienced by each group of associated cells. Low cell-delay variation means a group of cells must travel through the network without getting too far apart from one another.
Cellular networks utilize various standards for data transmission, including 5G which can support one million separate devices per square kilometer. Many computer networks use a simple line code to transmit one type of signal using a medium's full bandwidth using its baseband (from zero through the highest frequency needed).
Most versions of the popular Ethernet family are given names, such as the original 1980s 10BASE5, to indicate this. Networks that use cable modems on standard cable television infrastructure are called broadband to indicate the wide range of frequencies that can include multiple data users as well as traditional television channels on the same cable. Broadband systems usually use a different radio frequency modulated by the data signal for each band.
The total bandwidth of the medium is larger than the bandwidth of any channel. The 10BROAD36 broadband variant of Ethernet was standardized by 1985, but was not commercially successful. The DOCSIS standard became available to consumers in the late 1990s, to provide Internet access to cable television residential customers.
Matters were further confused by the fact that the 10PASS-TS standard for Ethernet ratified in 2008 used DSL technology, and both cable and DSL modems often have Ethernet connectors on them. Power lines have also been used for various types of data communication. Although some systems for remote control are based on narrowband signaling, modern high-speed systems use broadband signaling to achieve very high data rates.
One example is the ITU-T G.hn standard, which provides a way to create a local area network up to 1 Gigabit/s (which is considered high-speed as of 2014) using existing home business and home wiring (including power lines, but also phone lines and coaxial cables). In 2014, researchers at Korea Advanced Institute of Science and Technology made developments on the creation of ultra-shallow broadband optical instruments.
Power lines have also been used for various types of data communication. Although some systems for remote control are based on narrowband signaling, modern high-speed systems use broadband signaling to achieve very high data rates. One example is the ITU-T G.hn standard, which provides a way to create a local area network up to 1 Gigabit/s (which is considered high-speed as of 2014) using existing home business and home wiring (including power lines, but also phone lines and coaxial cables).
In 2014, researchers at Korea Advanced Institute of Science and Technology made developments on the creation of ultra-shallow broadband optical instruments.
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