____ __ ____ _____ ____ ______ _____ _____ ____ _____ _____ _____ ____ _____ Click to edit Master text styles Second level Third level Fourth level Fifth level National Interoperability Test Facility 700 MHz Public Safety Broadband Wireless Networks - Long Term Evolution (LTE) District of Columbia October 15, 2009

____ __ ____ _____ ____ ______ _____ _____ ____ _____ _____ _____ ____ _____ Click to edit Master text styles Second level Third level Fourth level Fifth level October 15, 2009 Proposal Summary Develop a national baseline of public safety requirements for LTE—local, state and federal. Test interoperability of multiple vendors’ products –12 base station sites available –Up to 6 vendors supply eNodeB base stations –Initially, use vendors’ remote core networks (Evolved Packet Core - EPC) and prototype devices –Develop multiple testing phases –Test interoperability of public safety applications –Test vendor interoperability of LTE network elements Evaluate Radio Access Network (RAN) design & performance

____ __ ____ _____ ____ ______ _____ _____ ____ _____ _____ _____ ____ _____ Click to edit Master text styles Second level Third level Fourth level Fifth level October 15, 2009 Public safety (local, state & federal) has unique interoperability challenges (roaming, applications, VPNs, etc.) LTE is highly complex to build and operate, especially the core network Testing is a driver of ongoing public safety requirements, especially for devices Mitigate risks of new technology Develop local/state/federal public safety-driven design and cost modeling for LTE Opportunity for public safety leveraged network with commercial carrier(s) depends on architectural design and business process development Why Public Safety Needs a Test Facility 3

____ __ ____ _____ ____ ______ _____ _____ ____ _____ _____ _____ ____ _____ Click to edit Master text styles Second level Third level Fourth level Fifth level October 15, 2009 Existing base station sites and backhaul –12 base station sites available (rooftop and towers) –Fiber infrastructure Local, state and federal agency users Challenging RF network environment –Noise floor variability –Global inflow and outflow of users and communication devices DC’s Special Temporary Authority (STA) to use public safety spectrum Experience from two generations of 700 MHz public safety broadband networks Ease of access for federal regulators / legislators District of Columbia Will Provide 4

____ __ ____ _____ ____ ______ _____ _____ ____ _____ _____ _____ ____ _____ Click to edit Master text styles Second level Third level Fourth level Fifth level October 15, Base Station Site Locations