MIDS-LVT LINK-16 INTRODUCTION - idlsoc.com

1 Government SystemsMIDS -LVT LINK-16 MIDS -LVT LINK-16 INTR ODUC TIONINTR ODUCTION International Data link Symposium2006Mr. James (Jim) Quis torfViaS at19 S eptember 2006 September 25, 2006 Government SystemsGovernment SystemsIDLS-2006 MIDS-LVT & LINK-16 : MIDS-LVT & LINK-16 : An IntroductionAn INTRODUCTION TOPICS to be CoveredTOPICS to be Covered LINK-16 OVERVIEW Basics J-series messages Waveform Time Slots Networks Round-Trip Timing (RTT) Relative Navigation Terminal-Host Interaction MIDS-LVT OVERVIEW System Identification System Operation Terminal Initialization & Control Functional Layout & SRU Review System SoftwareSeptember 25, 2006 Government SystemsGovernment SystemsIDLS-2006 MIDS-LVT & LINK-16 : MIDS-LVT & LINK-16 .

2 An IntroductionAn INTRODUCTION link 16 Overview: link 16 Overview: The Basics The Basics Tactical Data link 16 ( link 16) Purpose: Exchange real-time tactical data. Architecture: Time Division Multiple Access (TDMA) Synchronization: Acquisition & maintenance of system time Terminal variations Class I, Class II, MIDS (LVT-1, LVT-2, LVT-3) Host platform integration requirements Features Jam resistance, Improved security data rate + amounts & granularity of IE terminal size = allows install in fighter/attack a/c PPLI & Relative navigation September 25, 2006 Government SystemsGovernment SystemsIDLS-2006 MIDS-LVT & LINK-16 : MIDS-LVT & LINK-16 : An IntroductionAn INTRODUCTION link 16 Overview: link 16 Overview.

3 J S eries Messages J S eries Messages Network ManagementTrack ManagementElectronic Initial Track EW Test Data Update Coordination & Net Time Time Slot PointerThreat Radio Relay Track Repromulgation IFF/SIF Comm Filter Weather over TSR Connectivity Interrogation Unit DesignatorNational Mission Correlator National Route National AcknowledgmentWeapons Coordination & National Communication National Net Control Engagement National Needline PG ECCM National National 5-NSAP recise Participant Location & Unit National Indirect Interface Unit Air Surface (Maritime) Subsurface (Maritime) Mission Land Ground Point Land Ground Track Precision AC Flight PathRTT-A RTT Controlling Unit ChangeRTT-B RTT Reference CorrelationRTT-REP RTT Emergency Target Air Surveillance Target Surface (Maritime) TrackSTANAG Subsurface (Maritime) TrackPlatform & System Land Ground Airfield StatusOP-SPEC Space Track Platform EW Product Platform Acoustic Platform Intelligence Platform StatusSeptember 25, 2006 Government SystemsGovernment SystemsIDLS-2006 MIDS-LVT & LINK-16 : MIDS-LVT & LINK-16 .

4 An IntroductionAn INTRODUCTION link 16 Overview: link 16 Overview: Notable J-MessagesNotable J-Messages Initial Entry Transmitted by Network Time Reference (NTR), IEJU, Active Relays Used by other terminals in acquiring system time RTT Round Trip Timing Support the Synchronization Process RTT Interrogation (RTT-I) may be either addressed (RTT-A) or broadcast (RTT-B) PPLI Automatically generated by terminal Keeps network informed of participant s location & IDSeptember 25, 2006 Government SystemsGovernment SystemsIDLS-2006 MIDS-LVT & LINK-16 : MIDS-LVT & LINK-16 : An IntroductionAn INTRODUCTION link 16 Overview: link 16 Overview: Waveform CharacteristicsWaveform Characteristics Frequency: 960-1215 MHz (Lx Band)September 25, 2006 Government SystemsGovernment SystemsIDLS-2006 MIDS-LVT & LINK-16 : MIDS-LVT & LINK-16 : An IntroductionAn INTRODUCTION link 16 Overview: link 16 Overview: Waveform CharacteristicsWaveform Characteristics Spread Spectrum 969-1206 MHz Lx Band IFF NOTCHES Centered on 1030 & 1090 MHz Frequency Hopping 51 Freqs.

5 Frequency not held constant Hop Rate: 76,923 hops per second September 25, 2006 Government SystemsGovernment SystemsIDLS-2006 MIDS-LVT & LINK-16 : MIDS-LVT & LINK-16 : An IntroductionAn INTRODUCTION link 16 Overview: link 16 Overview: The NetworkThe Network TDMA Division of Network Time 1 Day = 24 hours 1 Day = Epochs 1 Epoch = min 1 Epoch = 64 Frames 1 Epoch = 98k time slots 1 Frame = 12 seconds 1 Frame = 1,536 Timeslots (3 sets of 512) 1 Timeslot = msecSeptember 25, 2006 Government SystemsGovernment SystemsIDLS-2006 MIDS-LVT & LINK-16 : An INTRODUCTION link 16 Overview: Timeslot Blocks SLOT Interval (within set) (within ) (time) No.

6 Slots per FrameRRN Time Slot Blocks (TSB) Assigned to each terminal for transmission and reception. Each block is defined by three variables: Set (A, B, or C) Index ( 0 511) (Starting Slot) Recurrence rateie; A-2-13 Recurrence Rate Number (RRN) The logarithm of number of slots in the time slot block. Indicates: Number slots in a block Time slot distributionSeptember 25, 2006 Government SystemsGovernment SystemsIDLS-2006 MIDS-LVT & LINK-16 : MIDS-LVT & LINK-16 : An IntroductionAn INTRODUCTION link 16 Overview: link 16 Overview: The Time S lot The Time S lot JITTERSYNCHMESSAGE HEADERMESSAGE DATAPROPAGATIONT/RJITTER: VARIABLE START INTERVALSYNCH: SYNCHRONIZATION PREAMBLE ALLOWS RECEIVING TERMINAL TO ID HEADER: ADDRESSMESSAGE DATA: BODY OF DATAPROPAGATION: TIME PERIOD ALLOWED FOR TRANSMISSION PROPAGATION.

7 ALLOWS TERMINALS TO UPDATE SYSTEM TIME TIME REFINEMENT: REMEMBER: J-STMPS eptember 25, 2006 Government SystemsGovernment SystemsIDLS-2006 STDP(186 pulses of data), P2SP (186 pulses of data), P2DP (372 pulses of data), P4SP (444 pulses of data).16x216x2 JitterTRH D1 SPropagationStandard Double Pulse16x24x216x293x2 JitterTRH D1 D2 SPropagationPacked-2 Single Pulse16x24x216x293x1 TRH D1 D2 SPropagationPacked-2 Double Pulse4x216x293x293x193x2 TRH D1 D2 D3 D4 SPropagationPacked-4 Single Pulse4x216x293x193x193x193x1 STRHD= Sync= Time Refinement= Header= DataMIDS-LVT & LINK-16 : MIDS-LVT & LINK-16 : An IntroductionAn INTRODUCTION link 16 Overview: link 16 Overview.

8 Data PackingData Packing Timeslots form at different # of data pulses, amount of EDAC encoding and amount of redundancy STDP is used whenever possible to ensure maximum anti-jam performance. P2SP and P2DP both allow for transmission of six LINK-16 words per timeslot. P4SP allow for transmission of 12 LINK-16 words per 25, 2006 Government SystemsGovernment SystemsIDLS-2006 MIDS-LVT & LINK-16 : MIDS-LVT & LINK-16 : An IntroductionAn INTRODUCTION link 16 Overview: link 16 Overview: The Network The Network Synchronization: The acquisition and maintenance of system time. The SYNCHRONIZING terminal must correct the ERROR (Initial Clock Offset) between terminals ( ).

9 RTT Messages: represent the only exception to the rule that a terminal can transmit or receive, but not both, in a given time slot. In link 16 operations, each terminal estimates how well it knows system time. This estimate is based on: 1. Clock drift, 2. Accuracy that terminals replying RTT interrogations know system time, 3. The time since it last completed an RTT exchange. The terminal uses this information to set its Time Quality (TQ). By definition, Only the Network Time Reference (NTR) has a TQ = 15 September 25, 2006 Government SystemsGovernment SystemsIDLS-2006 MIDS-LVT & LINK-16 : MIDS-LVT & LINK-16 : An IntroductionAn INTRODUCTION link 16 Overview: link 16 Overview: Round Trip Timing (RTT)Round Trip Timing (RTT) User Terminal: Transmit an RTT Interrogation (RTTI) in the beginning of the slot and receive an RTT Reply (RTTR) later in the slot.

10 Net Time Reference (NTR): Receive an RTTI in the beginning of the slot and transmit an RTTR later in the 25, 2006 Government SystemsGovernment SystemsIDLS-2006 MIDS-LVT & LINK-16 : MIDS-LVT & LINK-16 : An IntroductionAn INTRODUCTION link 16 Overview: link 16 Overview: Relative NavigationRelative Navigation Determining the distance of JUs by measuring the Time of Arrival (TOA) of received PPLI and correlating that information with reported LAT/LONG Synchronous nature of link 16 provides the basis for individual JU s to determine own-unit location relative to other JU s in the network. An automatic function of the terminalSeptember 25, 2006 Government SystemsGovernment SystemsIDLS-2006 MIDS-LVT & LINK-16 : MIDS-LVT & LINK-16 : An IntroductionAn INTRODUCTION link 16 Overview: link 16 Overview: Relative NavigationRelative Navigation The Terminal's navigation function performs all computations necessary to determine own unit navigation data measured on: received link 16 PPLI data contained in the from.