What is Picocell?
A picocell is a small, low-power cellular base station designed to provide coverage and capacity enhancement in a limited area — typically covering 100–200 metres indoors or up to 250 metres outdoors. Picocells are a key component of Heterogeneous Networks (HetNets) in both 4G LTE and 5G NR, deployed alongside macro cells to offload traffic in high-density areas such as offices, shopping centres, airports, and stadiums. They offer higher capacity than femtocells and are operator-managed, unlike consumer-deployed femtocells.
How Does Picocell Work?
A picocell consists of a small form-factor base station (eNB for LTE, gNB for 5G NR) with integrated antennas and typically 0.25–2 watts of transmit power. It connects to the core network via standard backhaul (Ethernet/fibre) and operates on either dedicated spectrum or shared spectrum with the macro layer. In HetNets, picocells handle capacity offloading — users within the picocell’s coverage area are served by the picocell rather than the macro cell, freeing macro resources. Interference management between macro and picocells uses techniques like eICIC (LTE) or cross-link interference mitigation (5G NR TDD). 5G NR picocells may use massive MIMO and operate in mid-band or mmWave frequencies.
Use Cases
Indoor coverage and capacity enhancement, enterprise office and campus deployments, public venue coverage (stadiums, airports, malls), urban hotspot capacity offloading, and private 5G network small cell deployments.
3GPP / Standards Reference
3GPP TS 36.300 (E-UTRAN HetNet architecture), 3GPP TS 38.300 (NR small cell deployment), 3GPP TR 36.932 (Small cell enhancements)
Related Terms
Cell Tower | gNB | RAN | MEC | Private 5G
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This glossary entry is part of the 5GWorldPro Complete 5G Glossary. To go deeper into 5G architecture and technology, explore our 5G Training courses.
