@article{Wang2006PTT,
author = {Y. Wang and M. Zukerman and R. J. Harris},
title = {{PTT} packet delay analysis for GPRS/GSM links},
journal = {IEEE Communications Letters},
volume = {10},
number = {6},
pages = {456-458},
month = {Jun.},
year = {2006},
abstract = {Push-to-talk (PTT) is a new mobile service that
enables fast-access and two-way communication between two or more users. This
paper develops an approximate evaluation model for PTT delay performance in
GPRS/GSM networks based on a quasi-stationary assumption and an M/G/1 processor
sharing queueing model. Numerical results are presented in order to illustrate
the effect of traffic load and other design parameters on PTT packet delay.}
}