DUBLIN--(BUSINESS WIRE)--Research and Markets (http://www.researchandmarkets.com/research/w73c7r/_public_safety) has announced the addition of the "Public Safety Spectrum & Systems: Which Pathways to Broadband PPDR Networks?" report to their offering. PPDR usage worldwide is concentrated on a limited number of frequency bands. Among them, the 400 MHz is the most currently used for narrowband systems. At the WRC-15 in November 2015, a decision is to be taken on allocation of frequencies for