Patent ID: 9107049
Filing Date: 2015-08-11
Classification: H04L,H04N,H04W

Abstract:
1. A method of making Voice over Internet Protocol (VoIP) calls, legacy circuit calls, and sending/receiving Short Message Service (SMS) using a Long Term Evolution (LTE) modem or a legacy modem, switching between the LTE and the legacy modem on a mobile terminal with both LTE and legacy modems, and providing all legacy modem functions using existing applications on the mobile terminal, the method comprising: a Session Initiation Protocol module (SIP) and Control/Status Module (CSM) subsystem making VoIP calls and sending/receiving SMS over Internet Protocol (SMSoIP) on an LTE processor; a Command Handler module directing voice and SMS messages from a modem driver to the SIP/CSM, and passing all other messages to the legacy modem directly; the CSM module determining, based on radio policy set by a network or the mobile terminal, whether the call or SMS will be processed by the SIP module and a Voice Engine as required or be passed to the legacy modem and processed by voice algorithms embedded in the legacy modem; the Command Handler module directing voice and SMS messages from the legacy modem to the SIP/CSM, and passing all other messages through to the modem driver; selecting the radio policy for Rich Communications Services (RCS) on the mobile terminal on a per function basis either by the mobile terminal or an operator of the network; and determining which network interface to use for each RCS function by making accessible to either the network or the mobile terminal a Radio Policy Manager (RPM) to set parameters or rules for making the determination.