In 3G or LTE mobile networks, a macro cell alone can not cover up the subscriber capacity and quality of experiences. Heterogenous network scenario is a method to improve capacity and coverage which can be achieved by integrating all wireless technologies and radio access in cost effective, from macro to small cell and wifi.
With data explosion demand and real-time application more and more data is passing through mobile network. This increase in traffic over limited network is causing service disruptions, data congestion and performance degradation.
Small cell solutions have some cost advantages for mobile data offloading. Traffic can be offloaded by 80% by utilising small cell compared to macrocell. The term small cell covers not only micro, pico or femto but also wifi which is using unlicensed spectrum.