Performance analysis of burst switching for integrated voice/data services

The voice cutoff fraction and mean data waiting time of an integrated burst-switched system are analyzed. Several approximate approaches are proposed for the analysis. Comparison between simulation and approximate results shows that the accuracy of the approximations depends on the relationship between μ_d and μ_v where 1/μ_d and 1/μ_v are the mean lengths of data and voice packets (bursts), respectively. In general, the approximations give good accuracy for μ_d≲μ_v. For μ_d>μ_v, the approximations for the mean data waiting time give less accurate but adequate results. From the analysis, it is found that a burst-switched system can achieve a higher bandwidth efficiency when data traffic has a shorter burst length (e.g. interactive data). Furthermore, it is also observed that the relative burst lengths between voice and data can significantly affect the characteristic of the voice clipping process. The analysis shows that, under normal operating condition where voice traffic is predominant and the constraint that the voice cutoff fraction is less than 0.5%, the data queue is always stable