Novel rate-jitter control algorithms for TDMoIP

Abstract

TDMoIP is the emulation of Time Division Multiplexing (TDM) over Packet Switched Network (PSN), say IP. When TDM traffic is packetized and injected into a PSN for transportation, packets arrive at the destination with different inter-arrival times, due to variable delay (jitter) introduced by PSN. This network induced jitter should be minimized, because TDM traffic is highly synchronous. Problem of jitter from theoretical (competitive and statistical analysis) to more practical view point had been well studied [1], [6]–[9]. In this paper, we have proposed two on-line algorithms, algorithm-A and algorithm-B to control the rate-jitter. We have shown both analytically and by simulation that the rate-jitter achieved by algorithm-A is strictly less than the rate-jitter of on-line algorithm proposed in [1] and through simulations, it is shown that algorithm-B also achieves less rate-jitter compared with [1]. We also undertake the statistical analysis of above algorithms, in particular, we modeled jitter buffer as an M/D̃/1/Bon queue and steady state queue length distribution is calculated. The correctness of the analytical results corresponding to our proposed algorithms is verified with simulation results. From the simulation results, it is also shown that the mean waiting time of a packet in the buffer is less for both the proposed algorithms compared with [1].