Patent ID: 9088876
Filing Date: 2015-07-21
Classification: H04L,H04M,H04W

Abstract:
1. A system for providing advanced voice services in a plurality of wireless communications networks, comprising: one or more servers that interface to the wireless communications networks to perform advanced voice services, the advanced voice services being performed for one or more mobile units in the wireless communications networks and the advanced voice services including an instant two-way half-duplex voice call within a group of mobile units comprising a Push-to-Talk-over-Cellular (PoC) call session; wherein both servers and the mobile units that use the advanced group services communicate with each other using Internet Protocol (IP) control messages within the wireless communications networks, and at least one of the servers switches IP voice packets for the advanced group services between the mobile units across the wireless communications networks; wherein at least one of the servers manages the PoC call session by acting as an arbitrator for the PoC call session and controls sending of the IP control packets and the IP voice packets to and from the mobile units; wherein at least one of the servers relays the IP voice packets between the mobile units and the servers; wherein at least one of the wireless communications networks comprises a WiFi network and at least one of the wireless communications networks comprises a wireless data network operated by a cellular service provider; and wherein at least one of the servers is coupled to the WiFi network, and the mobile units together with the servers coupled to the WiFi network implement a WiFi interworking solution for performing transitions of the mobile units between the WiFi network and the wireless data network operated by the cellular service provider.