Closed form analysis of a slotted ALOHA random access protocol in a mixed voice and data with a finite number of sessions in wireless communications

The paper presents a performance analysis of a random access (RA) protocol that is in use in a TDMA multi-access mobile communication channel. The channel is shared by mixed voice and data with general distribution. The work considers a class of data that consists of a finite number of open sessions. Users contend in the uplink using an RA protocol based on S-ALOHA and contention takes places every N_C frames. We start with a general model description of a voice and data subsystem in which admission protocols are explained. An analytical framework is derived. An algorithm is then formulated that complements the analytical framework. The analysis is based on equilibrium-point-analysis (EPA) and is novel and topical. Numerical results are corroborated using a simulation in OPNET.