Public Safety Voice Service Solution for Broadband Wireless Infrastructure and Handsets

We will develop PS-specific voice service and system requirements based on the input from the PS community and will design an innovative and practical voice service architecture that can interwork with existing public safety communication systems, including Project 25 LMR, 4.9 GHz WiMAX and commercial cellular networks. Our architecture enables the use of cost-effective commercial handsets while still delivering interoperability with legacy PS voice services by augmenting the commercial LTE infrastructure with PS Interworking and gateway functions. The LTE handset running the PS voice applications supports both the infrastructure and talkaround modes. The infrastructure mode uses off-the-shelf cellular and LTE radios. The talkaround mode uses enhanced Wi-Fi mesh architecture. With its unique talkaround function, our solution will be of value to the PS and commercial users. It will address stringent voice service requirements of first responders (police, fire, EMT), national responders and military users while also serving the communication needs of commercial industries operating in remote areas with sparse cellular coverage (mining, oil exploration, seafaring vessels).