{"@type": "dcat:Dataset", "accessLevel": "public", "accrualPeriodicity": "irregular", "bureauCode": ["006:55"], "contactPoint": {"fn": "Alison Kahn", "hasEmail": "mailto:alison.kahn@nist.gov"}, "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.", "distribution": [{"accessURL": "https://github.com/usnistgov/accessTime", "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.", "format": "Git repository", "title": "accessTime Repository"}, {"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.", "downloadURL": "https://data.nist.gov/od/ds/mds2-2356/Access%20Time%20Addendum%20Paper%20Data.zip", "format": "zip", "mediaType": "application/x-zip-compressed", "title": "Example Access Time Addendum Paper Data"}, {"downloadURL": "https://data.nist.gov/od/ds/mds2-2356/Access%20Time%20Addendum%20Paper%20Data.zip.sha256", "mediaType": "text/plain", "title": "SHA256 File for Example Access Time Addendum Paper Data"}], "identifier": "ark:/88434/mds2-2356", "issued": "2021-02-17", "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"], "landingPage": "https://data.nist.gov/od/id/mds2-2356", "language": ["en"], "license": "https://www.nist.gov/open/license", "modified": "2021-02-08 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.8328"], "theme": ["Public Safety:Public safety communications research"], "title": "Mission Critical Voice Quality of Experience Access Time Measurement Method Addendum Data"}