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Beyond Line of Sight (BLOS) communications

  • Mon 9th Feb 2015

MilCIS 2011 demonstration

The 2011 Military Communications and Information Systems (MilCIS) conference was held in Canberra, Australia, during November. The MilCIS conference is the premier gathering of defense and government organizations, as well as research, academia and industry members from Australia and around the globe. Its aim is to facilitate ongoing discussion of current and future defense requirements, capabilities and technological solutions.

Throughout the 2011 MilCIS, a series of live tactical information exchange domain (TIED) demonstrations were jointly presented by the Tactical Information Exchange Integration Office (TIEIO) and the Australian/New Zealand chapter of the International Data Link Society (IDLSoc).

Rohde & Schwarz collaborated with the US-based Joint Range Extension (JRE) team from L-3 in San Diego in order to demonstrate the capability of the and to pass the Joint Range Extension Application Protocol (JREAP-C) IP data over an HF link using the xDL protocol variant of the HDL+ high rate data link protocol.

The xDL protocols provide a transparent IP interface that allows users to implement standard IP-based applications and transmit the IP data stream beyond line of sight (BLOS) using the R&S®M3SR Series4100 HF radios and R&S®M3TR tactical radios.

Scenario and Setup

The primary goal of Rohde & Schwarz was to show the R&S®M3SR and R&S®M3TR radios’ capability to successfully transmit and receive IP data using the xDL protocols embedded within the radios’ ALE-3G protocol stack.

For L-3, the main aim was to display the JRE system’s capability to successfully transmit and receive JREAP-C IP data via a BLOS HF radio bearer.

Combined, these two capabilities enable a real-world scenario of passing a tactical data stream from a tactical data link (TDL) capable platform (e.g. a major surface combatant with a Link 16 / Link 11 capability) to a TDL disadvantaged platform (e.g. a patrol vessel without an inherent TDL capability onboard). This scenario can be expanded to include passing data from land sites to vehicular platforms, helicopter platforms, dismounted soldiers, etc.

The block diagram below shows the setup displayed at MilCIS. The system on the left-hand side represents the major surface combatant or land station capability. This station converts the original link formatted data into the JREAP-C (UDP/IP) variant for transmission over the R&S®M3SR Series4100 HF radio.

On the right-hand side, the TDL disadvantaged platform is represented, with only the R&S®M3TR MR3000 tactical radio and a JRE capable user terminal (e.g. a CF-52 Toughbook or the L-3 JRE Enabled TacView (JET)) required to provide the platform with a TDL capability.