In cellular networks, the size of cells is kept smaller—a technique often referred to as cell splitting or densification—primarily to increase network capacity and improve efficiency.
As user demand for data-intensive services grows, shrinking the size of cells is the most effective way to manage limited radio spectrum.
The fundamental principle of a cellular network is to reuse the same frequencies across different, non-adjacent geographical areas.
By creating smaller cells, carriers can reuse the same frequency bands more frequently in a given area, allowing a much higher number of users to connect simultaneously.
Small cells use lower power transmitters. By reducing the transmission power, the signal does not travel as far, minimizing interference with adjacent cells (co-channel interference).
This creates a cleaner signal and higher quality of service (QoS).
Small cells are often deployed closer to the user.
A shorter distance between the user’s mobile device and the base station means less signal attenuation and faster, more reliable data transmission, which is crucial for 5G, streaming, and gaming.
High-frequency signals, particularly in 5G, cannot easily penetrate walls. Smaller cells (like picocells and femtocells) can be installed inside buildings, in shopping centers, or on streetlights to fill coverage gaps and provide superior, consistent indoor connectivity.
Because the base station is closer, the mobile phone needs to use less transmission power to communicate, which reduces energy consumption and prolongs the battery life of the user’s device.
In urban areas with high density (hotspots), small cells help "offload" traffic from large, congested, high-power macrocells, reducing congestion and improving overall network performance.