Uplink vs Downlink | difference between Uplink and also Downlink

The ax uplink suggests transmissions native ground side in the direction of cell tower and downlink indicates transmissions from cell tower towards ground side.Let us compare Uplink vs Downlink and derive difference in between Uplink and Downlink.

You are watching: Transmission from a satellite to an earth-based station is called an uplink.

This terms room usually supplied in wireless network. As we understand wireless network is created of two main parts viz.network side and mobile or addressed subscriber side. Network side houses network equipments such as base terminal (BTS) or Node-B or eNB.Network part also interfaces v PSTN, ISDN and also PSDN (i.e. Internet) in stimulate to provide various services to the subscribers or users.Subscriber side homes mobile phone call or smartphone with SIM card. The individuals can also use tablet or laptop to attach withnetwork because that data access. Below uplink describes transmissions indigenous subscribers next to the network anddownlink describes transmission native network come subscribers. Let us understand both uplink and downlink with respect toexamples.

What is Uplink ?

It is supplied to indicate transmission path from one device to the various other i.e. From mobile or solved terminal come the network side.The frequency provided for all the transmissions native Mobile Subscriber Unit (MS) come the Base station (BS) (i.e. Node-B, eNB) is known asuplink frequency. The data transmission direction from multiple sclerosis to BS is dubbed uplink direction. Permit us know term "uplink" v respect todifferent wireless technologies.


As we recognize satellite interaction is provided to cover broad area of the earth. To carry out ground connectivity with the satellite, VSATs and also Hub or earth stationsare installed at various locations on the planet after RF link budget estimation.The direction indigenous VSATs to sallite is recognized as uplink and also the direction native satellite come VSATs is well-known as downlink.6GHz tape frequency is provided for uplink and 4GHz frequency band is supplied for downlink in C tape satellite interaction operation.5925 MHz come 6425 MHz is uplink band where as 3700 come 4200 MHz is downlink band.Refer VSAT mechanism Overview>>.

In GSM network, the packet transmission from ms to BTS is recognized as uplinkwhere as from BTS to ms is recognized as downlink.In GSM frequency selection from 890 MHz come 915 MHz is used as uplink frequencywhere together 935 MHz to 960 MHz is supplied as downlink frequency.Refer GSM mechanism tutorial>>.


What is Downlink ?

The frequency provided for all the transmissions native Base terminal to the cell phone Subscriber Unit (MS) is known asdownlink frequency. The direction indigenous BS to MSs is dubbed downlink direction.TDD (Time division Duplex) and also FDD (Frequency division Duplex) is provided in mix withFDMA (Frequency division Multiple Access) and also TDMA (Time department Multiple Access)in order to usage the bandwidth effectively in wireless systems.

As mentioned above in C band satellite network, 3700 to 4200 MHz is provided as downlink frequency band.In GSM, frequency selection from 935 MHz to 960 MHz is supplied as downlink frequency range.

The RF unit referred to as upconverter is offered to transform baseband frequency to RF frequency fortransmissions in the uplink side.The RF unit referred to as downconverter is offered to transform RF frequency come baseband frequency forreceptions in the downlink side. The unit which go both teh uplink and also downlink processingis recognized as Transceiver. Modem is provided to interface with RF transceiver ~ above one next andantenna is supplied on the other side.

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In wireless system, these terms uplink and also downlink are provided to indicate channels (uplink channel, downlink channel), structure structure (uplink frame, downlink frame), packets (uplink packet, downlink packet) and so on.Similarly in wired system, the transmissions native modem towards cable heat is well-known as upstream directionwhere together from internet server in the direction of modem/user terminal is recognized as downstream direction.From the above discussion we can conveniently derive difference between uplink and downlink terms.

What is distinction between

Up converter and also Down converterdifference in between FDM and also OFDM Difference between SC-FDMA and OFDM Difference between SISO and also MIMO Difference between TDD and also FDD Difference between 802.11 criter viz.11-a,11-b,11-g and 11-n FDM vs TDMRF heterodyne versus homodyne recipient SCPC Vs. MCPCDiplexer matches DuplexerSensitivity Vs. Selectivity

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