Indigenous 4G stack
Also called: Atmanirbhar 4G stack, Swadeshi 4G stack · Topic: Infrastructure: Transport, Communications and Energy · NCERT: Beyond NCERT
Meaning
An indigenous 4G stack is a complete 4G mobile network system that India designed and built itself, with no foreign telecom vendors involved. A "stack" is all the layers a network needs to run. BSNL's stack has three Indian parts. C-DOT (the government's telecom research centre) built the core network, which is the "brain" that manages calls, data and users. Tejas Networks made the radio equipment that sends signals from towers to phones. TCS is the system integrator, the firm that makes all the parts work together. The Prime Minister launched it nationwide in September 2025, along with one lakh BSNL towers. With it, India became one of five countries with a fully home-grown 4G stack, a goal of Atmanirbhar Bharat (self-reliance).
Example
Under the 4G Saturation Project, approved by the Cabinet on 27 July 2022 at ₹26,316 crore, BSNL uses this stack to bring 4G to 24,680 villages that had no coverage. The money comes from Digital Bharat Nidhi. In LWE-affected and border areas, the stack helps in two ways. Remote villagers get mobile service, and the security network does not depend on foreign equipment.
Don't confuse with
- C-DOT alone: C-DOT built only the core network, which is one part of the stack. The stack also needs Tejas radio equipment and TCS integration. BSNL runs the network, not C-DOT.
- The 4G Saturation Project: that project is the rollout to uncovered villages. The indigenous stack is the technology the project uses.