{
  "_schema": "https://data.nist.gov/od/dm/nerdm-schema/v0.7#",
  "@context": [
    "https://data.nist.gov/od/dm/nerdm-pub-context.jsonld",
    {
      "@base": "ark:/88434/mds2-2356"
    }
  ],
  "@type": [
    "nrdp:PublicDataResource",
    "dcat:Dataset"
  ],
  "_extensionSchemas": [
    "https://data.nist.gov/od/dm/nerdm-schema/pub/v0.7#/definitions/PublicDataResource"
  ],
  "@id": "ark:/88434/mds2-2356",
  "ediid": "ark:/88434/mds2-2356",
  "version": "1.2.5",
  "title": "Mission Critical Voice Quality of Experience Access Time Measurement Method Addendum Data",
  "contactPoint": {
    "fn": "Alison Kahn",
    "hasEmail": "mailto:alison.kahn@nist.gov"
  },
  "modified": "2021-02-08 00:00:00",
  "landingPage": "https://data.nist.gov/od/id/mds2-2356",
  "description": [
    "These are measurement data associated with https://doi.org/10.6028/NIST.IR.8328. Code to process data is available at https://github.com/usnistgov/accessTime. Includes access delay measurement results for P25 Direct operating in unencrypted and encrypted modes, P25 Trunked Phase 1 and Phase 2 operating in unencrypted and encrypted modes, and an early development of a 3GPP compliant LTE MCPTT application server. Transmit audio and associated cutpoints files are also included."
  ],
  "keyword": [
    "Access delay; Articulation Band Correlation Modified Rhyme Test (ABC-MRT); A-weight; Encryption; Key performance indicator (KPI); Land mobile radio (LMR); Latency; Long Term Evolution (LTE); Mission Critical Push-to-Talk (MCPTT); Modified Rhyme Test (MRT); Mouth-to-ear (M2E); Packetized; Project 25 (P25); Public Safety; Push-to-talk (PTT); Quality of experience (QoE); Receive; Streaming; Transmit; Vocoder"
  ],
  "theme": [
    "Public Safety: Public safety communications research"
  ],
  "topic": [
    {
      "@type": "Concept",
      "scheme": "https://data.nist.gov/od/dm/nist-themes/v1.1",
      "tag": "Public Safety: Public safety communications research"
    }
  ],
  "references": [
    {
      "@type": [
        "npg:Document"
      ],
      "@id": "#ref:10.6028/NIST.IR.8328",
      "refType": "References",
      "location": "https://doi.org/10.6028/NIST.IR.8328",
      "_extensionSchemas": [
        "https://data.nist.gov/od/dm/nerdm-schema/bib/v0.7#/definitions/DCiteReference"
      ],
      "title": "Mission Critical Voice Quality of Experience Access Time Measurement Method Addendum",
      "issued": "2020-12-02",
      "citation": "Greene, C., Frey, J., Soetan, Z., Pieper, J., & Thompson, T. (2020). Mission Critical Voice Quality of Experience Access Time Measurement Method Addendum. doi:10.6028/nist.ir.8328\n"
    }
  ],
  "accessLevel": "public",
  "license": "https://www.nist.gov/open/license",
  "components": [
    {
      "accessURL": "https://github.com/usnistgov/accessTime",
      "format": {
        "description": "Git repository"
      },
      "description": "The purpose of this software is to measure the access delay of a push-to-talk network. Access time generally describes time associated with the initialization and assignment of channels upon user request to speak and has been identified as a key component of quality of experience (QoE) in communications. NIST?s PSCR division developed a method to measure and quantify the access time of any push to talk (PTT) communication system.",
      "title": "accessTime Repository",
      "@type": [
        "nrdp:AccessPage",
        "dcat:Distribution"
      ],
      "@id": "#usnistgov/accessTime",
      "_extensionSchemas": [
        "https://data.nist.gov/od/dm/nerdm-schema/pub/v0.7#/definitions/AccessPage"
      ]
    },
    {
      "@id": "cmps/Access Time Addendum Paper Data.zip.sha256",
      "@type": [
        "nrdp:ChecksumFile",
        "nrdp:DownloadableFile",
        "dcat:Distribution"
      ],
      "filepath": "Access Time Addendum Paper Data.zip.sha256",
      "downloadURL": "https://data.nist.gov/od/ds/mds2-2356/Access%20Time%20Addendum%20Paper%20Data.zip.sha256",
      "algorithm": {
        "tag": "sha256",
        "@type": "Thing"
      },
      "describes": "cmps/Access Time Addendum Paper Data.zip",
      "description": "SHA-256 checksum value for Access Time Addendum Paper Data.zip",
      "_extensionSchemas": [
        "https://data.nist.gov/od/dm/nerdm-schema/pub/v0.7#/definitions/ChecksumFile"
      ],
      "mediaType": "text/plain",
      "size": 64,
      "checksum": {
        "hash": "e2b34b8fdf75c3eb450099cfae82b85ee5b0d5b9ef979e29a0194ad9335a4d93",
        "algorithm": {
          "tag": "sha256",
          "@type": "Thing"
        }
      },
      "valid": true,
      "title": "SHA256 File for Example Access Time Addendum Paper Data"
    },
    {
      "@id": "cmps/Access Time Addendum Paper Data.zip",
      "@type": [
        "nrdp:DataFile",
        "nrdp:DownloadableFile",
        "dcat:Distribution"
      ],
      "_extensionSchemas": [
        "https://data.nist.gov/od/dm/nerdm-schema/pub/v0.7#/definitions/DataFile"
      ],
      "filepath": "Access Time Addendum Paper Data.zip",
      "downloadURL": "https://data.nist.gov/od/ds/mds2-2356/Access%20Time%20Addendum%20Paper%20Data.zip",
      "mediaType": "application/x-zip-compressed",
      "format": {
        "description": "zip"
      },
      "description": "Measurement data associated with https://doi.org/10.6028/NIST.IR.8328. Code to process data is available at https://github.com/usnistgov/accessTime. Includes access delay measurement results for P25 Direct operating in an unencrypted and encrypted modes, P25 Trunked Phase 1 and Phase 2 operating in unencrypted and encrypted modes, and an early development of a 3GPP compliant LTE MCPTT application server. Transmit audio and associated cutpoints files are also included.",
      "size": 6952404,
      "_status": "in progress",
      "checksum": {
        "hash": "7c39e5a9d2439e8d15da592fea5dfeb9674a3d51dc14e0c8f8717dc1ea7a838e",
        "algorithm": {
          "tag": "sha256",
          "@type": "Thing"
        }
      },
      "title": "Example Access Time Addendum Paper Data"
    }
  ],
  "publisher": {
    "name": "National Institute of Standards and Technology",
    "@type": "org:Organization"
  },
  "language": [
    "en"
  ],
  "bureauCode": [
    "006:55"
  ],
  "programCode": [
    "006:052"
  ],
  "doi": "doi:10.18434/mds2-2356",
  "versionHistory": [
    {
      "version": "1.0.0",
      "issued": "2021-02-08",
      "@id": "ark:/88434/mds2-2356",
      "location": "https://data.nist.gov/od/id/ark:/88434/mds2-2356",
      "description": "initial release"
    },
    {
      "version": "1.0.1",
      "issued": "2021-02-08",
      "@id": "ark:/88434/mds2-2356",
      "location": "https://data.nist.gov/od/id/ark:/88434/mds2-2356",
      "description": "metadata update"
    },
    {
      "version": "1.2.0",
      "issued": "2021-02-08",
      "@id": "ark:/88434/mds2-2356",
      "location": "https://data.nist.gov/od/id/ark:/88434/mds2-2356",
      "description": "data update"
    }
  ],
  "releaseHistory": {
    "@id": "ark:/88434/mds2-2356.rel",
    "@type": [
      "nrdr:ReleaseHistory"
    ],
    "hasRelease": [
      {
        "version": "1.0.0",
        "issued": "2021-02-08",
        "@id": "ark:/88434/mds2-2356/pdr:v/1.0.0",
        "location": "https://data.nist.gov/od/id/ark:/88434/mds2-2356/pdr:v/1.0.0",
        "description": "initial release"
      },
      {
        "version": "1.0.1",
        "issued": "2021-02-08",
        "@id": "ark:/88434/mds2-2356/pdr:v/1.0.1",
        "location": "https://data.nist.gov/od/id/ark:/88434/mds2-2356/pdr:v/1.0.1",
        "description": "metadata update"
      },
      {
        "version": "1.2.0",
        "issued": "2021-02-08",
        "@id": "ark:/88434/mds2-2356/pdr:v/1.2.0",
        "location": "https://data.nist.gov/od/id/ark:/88434/mds2-2356/pdr:v/1.2.0",
        "description": "data update"
      },
      {
        "version": "1.2.1",
        "issued": "2021-02-08 00:00:00",
        "@id": "ark:/88434/mds2-2356/pdr:v/1.2.1",
        "location": "https://data.nist.gov/od/id/ark:/88434/mds2-2356/pdr:v/1.2.1",
        "description": "metadata update"
      },
      {
        "version": "1.2.2",
        "issued": "2021-02-08 00:00:00",
        "@id": "ark:/88434/mds2-2356/pdr:v/1.2.2",
        "location": "https://data.nist.gov/od/id/ark:/88434/mds2-2356/pdr:v/1.2.2",
        "description": "metadata update"
      },
      {
        "version": "1.2.3",
        "issued": "2021-02-08 00:00:00",
        "@id": "ark:/88434/mds2-2356/pdr:v/1.2.3",
        "location": "https://data.nist.gov/od/id/ark:/88434/mds2-2356/pdr:v/1.2.3",
        "description": "metadata update"
      },
      {
        "version": "1.2.4",
        "issued": "2021-02-08 00:00:00",
        "@id": "ark:/88434/mds2-2356/pdr:v/1.2.4",
        "location": "https://data.nist.gov/od/id/ark:/88434/mds2-2356/pdr:v/1.2.4",
        "description": "metadata update"
      },
      {
        "version": "1.2.5",
        "issued": "2021-02-08 00:00:00",
        "@id": "ark:/88434/mds2-2356/pdr:v/1.2.5",
        "location": "https://data.nist.gov/od/id/ark:/88434/mds2-2356/pdr:v/1.2.5",
        "description": "metadata update"
      }
    ]
  },
  "issued": "2021-02-17T13:38:20",
  "status": "available",
  "annotated": "2025-04-04T16:14:05.352072"
}