@misc{1135221, author = {Priam Varin and Yishen Sun and Wesley Garey}, title = {Test scenarios for mission critical push-to-talk (MCPTT) off-network mode protocols implementation:}, year = {2018}, month = {2018-10-01 04:10:00}, publisher = {, National Institute of Standards and Technology, Gaithersburg, MD}, doi = {https://doi.org/10.6028/NIST.IR.8236}, language = {en}, }