Margaret Rouse is an award-winning technical writer and teacher known for her ability to explain complex technical subjects simply to a non-technical, business audience. Over…
Downlink is a telecommunication term pertaining to data which is sent out or downwards from a higher level or portion of a network.
Traditionally, it refers to a satellite communications process where data is sent from a satellite down to an earthbound terminal or device, hence the word "down." It is also used in other fields of networking like cellular and computer networking, where it is used in a similar manner but may or may not involve the directional meaning of up or down.
In satellite communications, downlink simply refers to the process when a satellite beams down information toward earthbound terminals or devices. The opposite of this is uplink, where the satellite receives data from an earthbound terminal.
In cellular networking, downlink can be seen from the user perspective as receiving some sort of message or data. A cellular device or phone receives direct communication from a cellular base station. An example of this is receiving a text message or an image from someone—that message is received the through a downlink communication process.
The term is used in the same way in computer networking. Edge terminals or nodes receive data from the network core or from higher-level network nodes such as routers and servers, and is commonly known as downloading. Therefore, the downloading of images and videos is done through the downlink process.
Techopedia’s editorial policy is centered on delivering thoroughly researched, accurate, and unbiased content. We uphold strict sourcing standards, and each page undergoes diligent review by our team of top technology experts and seasoned editors. This process ensures the integrity, relevance, and value of our content for our readers.
Margaret is an award-winning technical writer and teacher known for her ability to explain complex technical subjects to a non-technical business audience. Over the past twenty years, her IT definitions have been published by Que in an encyclopedia of technology terms and cited in articles by the New York Times, Time Magazine, USA Today, ZDNet, PC Magazine, and Discovery Magazine. She joined Techopedia in 2011. Margaret's idea of a fun day is helping IT and business professionals learn to speak each other’s highly specialized languages.
What is whoami? whoami is a command-line utility program for computers. It answers the question, "Who am I logged in as?" and...
Margaret RouseTechnology Expert
What is Backhaul? Backhaul is the process of transmitting data signals from remote locations or networks back to central ones...
Kuntal ChakrabortyTechnology Writer
What Does Interplanetary File System Mean? The Interplanetary File System (IPFS) is an open-source storage protocol for peer-to-peer (P2P) networks....
Trending NewsLatest GuidesReviewsTerm of the Day