{
    "identifier": "8C669FDFEA76120CE0532457068104992083",
    "accessLevel": "public",
    "references": [
        "https:\/\/doi.org\/10.6028\/NIST.IR.8275"
    ],
    "contactPoint": {
        "hasEmail": "mailto:[email protected]",
        "fn": "Alison Kahn"
    },
    "programCode": [
        "006:045"
    ],
    "@type": "dcat:Dataset",
    "landingPage": "https:\/\/data.nist.gov\/od\/id\/mds2-2083",
    "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.",
    "language": [
        "en"
    ],
    "title": "MCV QoE End to End Access Time Measurement Data",
    "distribution": [
        {
            "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"
        },
        {
            "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.",
            "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.",
            "mediaType": "application\/x-zip-compressed",
            "title": "Example Access Delay Measurement Data"
        },
        {
            "downloadURL": "https:\/\/doi.org\/10.18434\/M32085",
            "format": "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.",
            "mediaType": "application\/http",
            "title": "accessTime Repository"
        },
        {
            "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"
        }
    ],
    "license": "https:\/\/www.nist.gov\/open\/license",
    "bureauCode": [
        "006:55"
    ],
    "rights": "Purchase is not required for data downloading. Users must complete registration form to download data.",
    "modified": "2019-06-28 00:00:00",
    "publisher": {
        "@type": "org:Organization",
        "name": "National Institute of Standards and Technology"
    },
    "theme": [
        "Advanced Communications:Wireless (RF)",
        "Public Safety:Public safety communications research"
    ],
    "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."
    ]
}