eNodeB is a 3GPP-compliant implementation of 4G LTE base station. It consists of independent Network Functions, which implement 3GPP-compliant LTE RAN protocols namely: PHY, MAC, RLC, PDCP, RRC, S1AP  see Figure below. They can run together or independently and can be deployed on either physical  (e.g. a small cell chipset) or virtual resources (e.g. dedicated COTS server or shared cloud resources).

Figure eNodeB 3GPP protocol stack Control Plane.

Figure 1. eNodeB 3GPP protocol stack for Control Plane.

Figure eNodeB 3GPP protocol stack User Plane.

Figure 2. eNodeB 3GPP protocol stack for User Plane.

The eNodeB stack that IS-Wireless offers covers the 4G LTE protocols defined by 3GPP. Features set can be customized to meet customer needs.

The software is implemented in a manner that enables any protocol stack cutting option defined by 3GPP. Examples of stack cuts in eNodeB, options 8 (between RU and DU) and 2 (between DU and CU), are presented in the pictures.

Figure stack cuts eNodeB


Virtualization Component (VC) directly enables eNodeBN modularization and execution either on physical or virtual resources. It is also responsible for the ability for seamless integration, extension and upgrades. VC’s own modularity, reusability and open, well-defined APIs adds great value to services provided by the RAN.