Similarly in wired system, the transmissions from modem towards cable line is known as upstream direction , frame structure (uplink frame, downlink frame), packets (uplink packet, downlink packet) and so on. In wireless system, these terms uplink and downlink are used to indicate channels (uplink channel, downlink channel) Modem is used to interface with RF transceiver on one side and The unit which does both teh uplink and downlink processing The RF unit called downconverter is used to convert RF frequency to baseband frequency for The RF unit called upconverter is used to convert baseband frequency to RF frequency for In GSM, frequency range from 935 MHz to 960 MHz is used as downlink frequency range. In order to use the bandwidth effectively in wireless systems.Īs mentioned above in C band satellite network, 3700 to 4200 MHz is used as downlink frequency band. TDD (Time Division Duplex) and FDD (Frequency Division Duplex) is used in combination withįDMA (Frequency Division Multiple Access) and TDMA (Time Division Multiple Access) The direction from BS to MSs is called downlink direction. The frequency used for all the transmissions from Base Station to the Mobile Subscriber Unit (MS) is known asĭownlink frequency. Where as 935 MHz to 960 MHz is used as downlink frequency. In GSM frequency range from 890 MHz to 915 MHz is used as uplink frequency Where as from BTS to MS is known as downlink. In GSM network, the packet transmission from MS to BTS is known as uplink The direction from VSATs to sallite is known as uplink and the direction from satellite to VSATs is known as downlink.ĦGHz band frequency is used for uplink and 4GHz frequency band is used for downlink in C band satellite communication operation.ĥ925 MHz to 6425 MHz is uplink band where as 3700 to 4200 MHz is downlink band. To provide ground connectivity with the satellite, VSATs and Hub or Earth stationsĪre installed at various places on the earth after RF link budget estimation. Let us understand term 'uplink' with respect toĪs we know satellite communication is used to cover wide area of the earth. The data transmission direction from MS to BS is called uplink direction. The frequency used for all the transmissions from Mobile Subscriber Unit (MS) to the Base Station (BS) (i.e. from mobile or fixed terminal to the network side. It is used to indicate transmission route from one device to the other i.e. Let us understand both uplink and downlink with respect to Here uplink refers to transmissions from subscribers side to the network andĭownlink refers to transmission from network to subscribers. The users can also use tablet or laptop to connect with Subscriber side houses mobile phone or smartphone with SIM card. internet) in order to provide various services to the subscribers or users. Network part also interfaces with PSTN, ISDN and PSDN (i.e. Network side houses network equipments such as base station (BTS) or Node-B or eNB. Network side and mobile or fixed subscriber side. As we know wireless network is composed of two main parts viz. This terms are usually used in wireless network. Let us compare Uplink vs Downlink and derive difference between Uplink and Downlink. The term uplink indicates transmissions from ground side towards cell tower and downlink indicates transmissions from cell tower towards ground side. Uplink vs Downlink | difference between Uplink and Downlink

Uplink vs downlink frequency