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Multi-Role – TCDL (MR-TCDL). Flexible, scaleable, modular, and programmable data link that can be
reconfigured through software programmable subsystems and plug-and-play modules for a variety of
missions and applications. MR-TCDL will be interoperable with the existing CDL systems and provide a
wideband “clear channel” for bandwidth-on-demand requirements of future applications. Through IP
networking, and SCA modularity, MR-TCDL will provide a full mesh, self-healing network that will
strengthen the Army Intelligence Community’s ability to allow the Army Knowledge Enterprise
UAS ROADMAP 2005
APPENDIX C - COMMUNICATIONS
Page C-9
Architecture, GIG, DCGS, Warfighter Information Network-Tactical (WIN-T), JTRS, and the family of
CDLs to communicate and disseminate information across the Army, Joint, Allied, and Coalition ISR air,
ground, and space functional areas. The MR-TCDL system will be capable of interoperating in
Multi-Connect/Direct-Connect RF topologies, and will provide a complimentary wideband RF network
backbone that is fully compatible and interoperable with the emerging Multi-Platform CDL (MP-CDL)
network topology.
Multi-Platform Common Data Link. Network-based application of the standard DoD data link for the
dissemination of ISR data. The airborne MP-CDL will be the first fully networked CDL the military has
deployed with the capability to communicate from the aircraft to as many as 30 active, airborne- and/or
ground-networked platforms at one time (threshold). MP-CDL can be used to relay information from one
aircraft to another or to ground stations in the network. It is a wideband, jam resistant, IP enabled data
link that includes a wideband mobile router running commercial off-the-shelf (COTS) protocols
(IPv4/RIP/DHCP) and a network manager using simple network management protocol (SNMP). The
MP-CDL system provides for extensive future growth capabilities including additional channels,
wideband (274 Mbit/s) SATCOM, higher data rates (548 Mbit/s and 1Gbit/s), and advanced networking
protocols. The flexibility and interoperability of the MP-CDL system will provide the net-centric
warfighter multiple communications capabilities, ultimately extending the edge of the Global Information
Grid through the command and control and ISR assets to the shooter.
Joint Tactical Radio System
JTRS will promote interoperability, streamline logistics across the Services, and reduce radio
maintenance costs, through the development and fielding of software defined radios. The JTRS Joint
Program Office (JPO) will oversee Service-led development and procurement of JTRS hardware and
software, including the software-defined waveforms, which will define the functionality of these new
radios. The new radios will match the size, weight, power, and interface requirements of legacy radio
systems that they are designed to replace.
The SCA governs the structure and operation of the JTRS, enabling programmable radios to load
waveforms, run applications, and be networked into an integrated system. For complete information on
this key standard see the Software Communications Architecture Specifications, MSRC-5000SCA. The
complete software specification along with Application Program Interface (API) and Security
supplements can be downloaded from the JTRS website:
http://jtrs.army.mil/sections/overview/fset_overview.html.
JTRS employs an evolutionary acquisition approach, which provides for multiple procurements with
increasing capability and functionality over the life of the program. Rather than delay fielding until
systems meet all requirements, initial capabilities are fielded as soon as possible, with new capabilities
added as they mature. JTRS evolution can be viewed as three distinct phases: Near-Term, Mid-Term,
and Long-Term.
Near-Term 2004-2007. This phase provides the warfighter with a foundation for future capabilities as
JTRS compliant equipment is developed and fielded. During the near-term, JTRS will provide
interoperability within each cluster and with all other clusters. Routing and retransmitting through
dedicated JTRS nodes will provide interoperability with legacy radios and networks during the transition
to full JTRS fielding.
Mid-Term 2007-2012. In the mid-term, tactical networks will use new JTRS capabilities, including the
Wideband Networking Waveform (WNW) and enhanced network, spectrum and security management.
Mid-term JTRS will also provide route and retransmission between JTRS and legacy networks.
Long-Term 2012-2030. Over the long-term, JTRS will provide a fully integrated information system
network to include active and passive information operations management across the joint and combined
environments. The system will include a self-establishing and self-healing "smart" network, which will
　
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