Research and design of Dual-Network Dual-Standby in Radio Interface Layer based on Android

摘要

This paper focuses on the improvement and the implementation of Dual-Network Dual-Standby (DNDS) based on Android, which is novel and can be extremely valuable as a more effective scheme to carry out DNDS. We research the Android system architecture and the call processing system. The new design scheme improves the Radio Interface Layer (RIL) and transplants a new set of RIL Daemon (RILD) processing mechanism. Here, we also design a socket that is between RIL Java framework and RIL C framework to intercept and distinguish different message flow, so that the phone application can identify and interact with the independent RILD. The result shows that this method has the advantages of simple, easy transplant, and effectively reduces the complexity and workload.