{
  "@type": "dcat:Dataset",
  "accessLevel": "public",
  "bureauCode": [
    "006:55"
  ],
  "contactPoint": {
    "fn": "Alison Kahn",
    "hasEmail": "mailto:alison.kahn@nist.gov"
  },
  "description": "Data collected includes audio device characterization (latency/delay). End to end access time of Land Mobile Radios (LMR) including direct mode operation and trunked mode operation.",
  "distribution": [
    {
      "accessURL": "https://nist.force.com/pdr?@id=8C669FDFEA76120CE0532457068104992083",
      "description": "This page provides a registration form that must be completed before downloading the data.",
      "title": "Gateway for Registered Data Access"
    },
    {
      "description": "Example measurement results from the Mission Critical Voice (MCV) Quality of Experience (QoE) access delay measurement system. Access delay and mouth-to-ear latency combine to describe end-to-end access time. In particular access delay describes the minimum amount of time a transmitting user must wait between pressing PTT on a device and starting to speak to ensure that the start of their message is not lost.",
      "downloadURL": "https://data.nist.gov/od/ds/8C669FDFEA76120CE0532457068104992083/Access_Time_Data.zip",
      "format": "The data is provided as wav files for the audio clips used, and results are presented as csv files.",
      "mediaType": "application/x-zip-compressed",
      "title": "Example Access Delay Measurement Data"
    },
    {
      "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.",
      "downloadURL": "https://doi.org/10.18434/M32085",
      "format": "Git repository",
      "mediaType": "application/http",
      "title": "accessTime Repository"
    },
    {
      "downloadURL": "https://data.nist.gov/od/ds/8C669FDFEA76120CE0532457068104992083/Access_Time_Data.zip.sha256",
      "mediaType": "text/plain",
      "title": "SHA256 File for Example Access Delay Measurement Data"
    }
  ],
  "identifier": "8C669FDFEA76120CE0532457068104992083",
  "issued": "2019-10-07",
  "keyword": [
    "Access Delay; Access Time; Articulation Band Correlation Modified Rhyme Test (ABC-MRT); Audio; Communications; Delay; Device to Device (D2D); Direct Mode; Handset;Key Performance Indicator (KPI); Land Mobile Radio (LMR); Latency; Mission CriticalPush  To  Talk  (MCPTT);  Mission  Critical  Voice  (MCV);  Modified  Rhyme  Test  (MRT);Mouth-to-Ear (M2E); Project 25 (P25); Proximity Services (ProSe); Public Safety; PushTo Talk (PTT); Quality of Experience (QoE); Quality of Service (QoS); Repeater;  RootMean Square Error (RMSE); Sidelink; Trunked Mode."
  ],
  "landingPage": "https://data.nist.gov/od/id/mds2-2083",
  "language": [
    "en"
  ],
  "license": "https://www.nist.gov/open/license",
  "modified": "2019-06-28 00:00:00",
  "programCode": [
    "006:045"
  ],
  "publisher": {
    "@type": "org:Organization",
    "name": "National Institute of Standards and Technology"
  },
  "references": [
    "https://doi.org/10.6028/NIST.IR.8275"
  ],
  "rights": "Purchase is not required for data downloading. Users must complete registration form to download data.",
  "theme": [
    "Advanced Communications:Wireless (RF)",
    "Public Safety:Public safety communications research"
  ],
  "title": "MCV QoE End to End Access Time Measurement Data"
}