Changes between Version 20 and Version 21 of WikiStart


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Timestamp:
17/02/15 16:31:43 (8 years ago)
Author:
marc.blanchet@…
Comment:

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  • WikiStart

    v20 v21  
    22
    33* DtnUseCases
    4 
    5 == DTN Use Cases ==
    6 
    7 Space Systems Communications
    8   * International Space Station (ISS) Tracking and Data Relay Satellite (TDRS)
    9     availability, bandwidth and latency
    10   * Deep space communications (One-­Way Light Time (OWLT) from Earth to Mars
    11     ~4min minimum)
    12   * Space system support for isolated ground systems (data exchanges only
    13     possible during satellite over-­flights)
    14   * GEO satellite communications for long-delay; frequent disruptions
    15     (replaces traditional Peformance Enhancing Proxies (PEPs))
    16   * LEO satellite communications with scheduled link intermittency
    17     which can take advantage of both DTN  scheduled contacts and
    18     resilience to disruption.
    19    
    20     Need:
    21       * BP Compressed format for resource-­constrained devices
    22       * BP End-to-end integrity assurance
    23       * Streamlined Security
    24       * Security Key Management
    25 
    26 Unmanned Air Systems (UAS) in Integrated Air Space
    27   * Unmanned Air Systems (UAS) will operate in same airspace as
    28     civil aviation (e.g., FAA Modernization and Reform Act of 2012)
    29   * RF communications occasionally subject to disruption (e.g.,
    30     terrain features, atmospheric conditions, signal fading, etc.)
    31   * Operation in remote regions can result in extended outages
    32   * Internet protocols alone (e.g., TCP/IP) insufficient to
    33     assure safety of flight
    34 
    35     Need:
    36       * BP and SBSP Improvements
    37       * Security Key Management
    38       * Dynamic Routing
    39       * Neighbor and Contact Discovery
    40 
    41 Vehicular Delay Tolerant Networks
    42   * Vehicles communicate with each other for road safety,
    43     traffic monitoring, navigation, etc.
    44   * Infreqenet transmission opportunities due to intermittent
    45     signals, sparse traffic conditions, terrain features etc.
    46   * Short contacts between vehicles passing
    47 
    48     Need:
    49       * BP and SBSP Improvements
    50       * Security Key Management
    51       * Dynamic Routing
    52       * Neighbor and Contact Discovery
    53 
    54 Disaster Response and Humanitarian Aid
    55   * Communications infrastructure frequently impaired or decimated
    56   * Response teams use portable or vehicular radio systems;
    57     “Reachback” via SATCOM; terrestrial links-of­-opportunity
    58   * Long delays when connected; extended periods of disruption
    59   * Loss due to attrition, battery lifetime, sensor network duty
    60     cycles, etc.
    61   * Ad‐hoc approaches often result in communication failures
    62 
    63     Need:
    64       * BP and SBSP Improvements
    65       * Security Key Management
    66       * Network Management
    67       * Neighbor and Contact Discovery
    68 
    69 Unmanned Underwater Vehicles (UUV)
    70   * UUV networking still in exploratory phase
    71   * Speed of sound underwater is only 1.5 km/sec; data rates are low
    72   * Long‐endurance UUV operations (days/weeks/months)
    73   * Delay-tolerant multi-hopping between mobile UUVs
    74   * Message relaying based on scheduled or unplanned windows of opportunity
    75   * Secure store, carry and forward of data objects larger than packets
    76 
    77     Need:
    78       * BP Compressed format for resource‐constrained devices
    79       * Streamlined Security
    80       * Neighbor and Contact Discovery
    81 
    82 Civil Aviation
    83   * Global Aeronautical Telecommunications Network (ATN) is low
    84     delay/disruption and can use traditional non-DTN protocols
    85   * Air Traffic Control (ATC), Airline Operations Control (AOC) track
    86     aircraft over ATN in all phases of flight in real time.
    87   * System‐Wide Information Management (SWIM) - significant delays possible
    88   * Aviation data links can experience disruption; some may not be available
    89     during all phases of flight, and periods of complete data link outages
    90     possible. DTN may be applicable.
    91 
    92     Need:
    93       * BP End‐to‐end integrity assurance
    94       * Streamlined Security
    95       * Security Key Management
    96 
    97 Summary
    98   * Many use cases, with more on the way
    99   * Of interest to many industry sectors
    100   * Bundle Protocol and security as enablers
    101   * DTNWG provides framework for moving the technology forward