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networking radios. For WNW to become the migration path for CDL wide band (>274 Mbit/s)
applications, however, high-powered, directional JTRS hardware would have to be developed and fielded.
In addition, a WNW waveform, capable of supporting such data rates would have to be developed,
integrated, tested and fielded. Current funding does not support this approach.
FIGURE C-9. SPIRALED STAGES TO A UA COMMUNICATIONS NETWORK.
Another possible direction would be, in keeping with currently published and supported OSD guidance,
continuing to evolve the CDL specification using existing processes. Initial tasks would be to migrate to
a net-centric footing, by isolating the data and transport layers from the physical connection, making CDL
a wideband, point to point, network connection, vice the tightly coupled closed circuit it is today.
Evolving software defined hardware components and supporting wideband waveforms would come next
bringing the CDL into SCA compliance, making it part of the family of JTRS solutions. Current funding,
however, does not support this approach either.
Regardless of which direction future CDL programming takes, however, one imperative remains clear.
Systems that need a CDL for wideband data exchanges, must submit their specific performance
requirements to the JTRS program office to help guide future wide band data link procurement efforts.
Figure C-10 illustrates these two potential directions.
Spiral Migration
to Seamless
GIG Spiral 4
2016
Spiral 3
2012
Full GIG Deployment: TSAT, Teleports, GIG-BE, JTRS, NCES
- Seamless capability to create and use global repository of
information, available to all authorized users
- Land, sea, air and space connectivity
-Support to stationary users and users on the move
Transition to Transformational Satellite (TSAT) with Teleports
- Extend Network Reach
- Dynamic Bandwidth Allocation
- UAV LaserComm Connectivity
Spiral 2
2008
Spiral 1
2006
Multiple Inter-Networked Systems
- UAV as Transport provider
- End to End Network Connectivity
- Extended wideband Capability
Initial Capability
- IP based transport
- Metadata registration
- Field Net-Centric systems: JTRS, WNW, WIN-T
- IP enable CDL data links
Current Experience – Unique non-interoperable solutions (stovepipes)
UAS ROADMAP 2005
APPENDIX C - COMMUNICATIONS
Page C-21
CDL requirements evolution
Feed into JTRS
WNW requirements
Evolve SCA compliant software defined
CDL hardware and software, and fold into
JTRS family of software defined radios
JTRS WNW capable of 274Mbps+
And range exceeding 250 nm
SCA compliant, JTRS version of
software defined CDL
FIGURE C-10. POTENTIAL CDL MIGRATION PATHS.
JTRS
The Joint Tactical Radio System program addresses legacy radio problems (refer to the section entitled
Radios) through a two-pronged approach: software and hardware. First, the SCA, written for the JTRS
program, specifies guidelines for developing software-defined waveforms. The Object Management
Group (OMG) has adopted the SCA as an industry standard. In addition to software, JTRS certified
hardware is being developed that can import software-defined waveforms and communicate using them.
The JTRS program will oversee development of a family of software-defined radios, based on a set of
common hardware components and software applications. All UA programs that require radios must
synchronize purchases with the JTRS schedule. In cases where JTRS radios are not yet available, these
programs must obtain a waiver, procure the minimum required number of legacy radios, and have a
migration plan to procure and install JTRS counterparts as they become available.
Figure C-11 shows IOC dates for key UA related JTRS programs. Cluster 1 and the MIDS JTRS should
reach IOC in 2007. USN/USA will demonstrate and begin fielding Fire Scout with an integrated SCA
compliant CDL (TCDL), using a JTRS Cluster I terminal equipped with a high-band modem module.
AMF JTRS is expected to reach IOC in 2009. This schedule may change, but it remains a requirement
for UA programs to coordinate all future radio purchases with the JTRS program office. For more
detailed information about JTRS Clusters refer to the section entitled “Joint Tactical Radio System.”
Additional information about the JTRS program and means of contact can be found at
http://jtrs.army.mil/index.htm.
UAS ROADMAP 2005
APPENDIX C - COMMUNICATIONS
Page C-22
UA Related Program Schedules
CY04 CY05 CY06 CY07 CY08 CY09 CY10 CY11 CY12 CY13 CY14 CY15
JTRS
TSAT
HAIPE
TSAT 1 TSAT 2 IOC TSAT 3 TSAT 4
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