In this topic, you will learn about, Multiplexing Techniques.
Multiplexing offers the facility to specify a satellite network. There are various types of multiplexing used with the satellite network. It is used when two devices are connected by a point to point a link to specify network sharing. Multiplexing specifies data rate and cost-effective transmission where multiplexing can be specified by synchronous and asynchronous transmission in the form of TDM and FDM.
- FDM: Frequency division multiplexing.
- TDM: Time division multiplexing.
- ATM: Asynchronous transmission multiplexing.
FDM: It stands for Frequency division multiplexing. It works by more multiplane which allows to collect all signals and distribute in time slice with the help of FCFS method. The TV cable is an example of FDM. FDM use bandwidth to specify transmission where signals cannot overlap.
TDM: It stands for Time division multiplexing. In this multiplexing signal pass or synchronize automatically. So, it is also called synchronous time division multiplexing. TDM allows receiving signals from multiple channels and also outputting all channels at once.
ATM: It stands for Asynchronous transmission medium. It is a type of multiplexing. It allows using with telephone signal. ATM networks are based on ISON and its allow to deal physically and work voltage bit, timing and type of signal. ATM consumes 53 bits memory space where 5 bit used for header and 48-bit used for user data. ATM multiplexing is a very small size multiplexing and can be implemented with very small networking devices.
ATM provides two levels of connections:
- Hierarchical model.
- Graphical model.
ATM hierarchical model visible for the transport layer but ATM doesn’t support guided medium likes twisted pair cable, co-axial cable, etc. ATM is connection-oriented multiplexing allows creating a virtual circuit for data transmission.
Advantages of ATM use small size memory:
- ATM can be applied with any small network or component. Eg: – Bluetooth device.
- ATM can be transferred easily over network due to small size.
- ATM support unguided transmission medium. So, we can easily work Wi-Fi, Bluetooth and satellite communication.
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