PTT packet delay analysis for GPRS/GSM links
Yan Wang, Moshe Zukerman, Richard Harris · IEEE Communications Letters · 2006
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