A Lightweight Signaling Solution Based on MQTT for Peer to Peer Video Call System

Along with the popularity of 5G mobile networks and the impact of the epidemic, there is a growing demand for video calls on mobile. The signaling protocol for video calls plays a very important role in maintaining the session state, we propose a lightweight signaling solution for video calls, which is based on MQTT protocol and takes advantage of MQTT's lightweight features. We have tested the system's functionality and signaling traffic consumption, and the results show that the system has complete video call functionality, is very traffic efficient at the signaling level, and has good call establishment delay.