Multiplexing, in the context of 5G wireless communication, refers to a collection of techniques that enable the simultaneous transmission of multiple data streams over a shared communication channel. This shared channel can be a physical medium like a radio frequency band, or a logical construct established within the network. For example, several users can transmit data to a base station at the same time using different sub-bands within the available spectrum.
Its significance stems from the need to maximize the efficiency of limited radio resources. Without it, each user or device would require its own dedicated channel, which would quickly exhaust available spectrum and severely limit network capacity. It enables operators to support a greater number of connected devices and applications, meeting the demands of increasing data traffic and diverse service requirements. Historically, advances have been pivotal in enabling each generation of wireless technology to support higher data rates and more users.
