A UNIFIED PERFORMANCE-MODEL FOR RESERVATION-TYPE MULTIPLE-ACCESS SCHEMES

This paper presents a unified performance model for the integrated voi ce/data wireless system using reservation-type multiple-access (MA) sc hemes, It is observed that although these schemes are different in the frame structure and resource assignment procedure, all of them can be described by several common state variables whose evolvement exhibits the Markovian property. Based on this observation, a general Markovia n model is developed in this paper, Three performance measures, namely , voice-packet-loss probability, data throughput, and data delay are d efined, As a special case, the performance evaluation model for the vo ice-only system is also presented, Numerical results are given and ver ified by simulation under both voice-only and integrated scenarios usi ng packet-reservation MA (PRMA), dynamic time-division multiple access (D-TDMA), and resource-auction multiple access (RAMA) as examples, It is found that our analytical model is quite accurate, especially in t he region of interest, The impact of system parameters (such as the vo ice-permission probability, data-retransmission probability, maximum n umber of voice slots per frame, etc.) on the integrated system perform ance is also investigated for these three example systems.