A jitter experience: dealing with SRD and LRD background traffic

摘要

From a pure signal point of view, jitter can be defined as an interference on an analog line caused by a variation of the signal from its reference timing slot. The same effect can be experienced within an ATM switch buffer at the cell level mechanism due to that many traffic streams are concurring to be served. Therefore, a theoretical approach for a single quality of service (QoS) constant bit rate (CBR) cell stream being multiplexed firstly with an elastic short-range dependent (SRD) background traffic and thereafter with a long-range dependent (LRD) traffic is presented. Results show that jitter experienced by the CBR cell stream, is extremely high when LRD traffic is being multiplexed with. This is not the case when SRD traffic is taking into account. Furthermore, this work shows a very interesting result, for low Hurst parameter values (H > 0.70), a sort of cross-effect boundary is visualized; it means that there could exist a threshold where self-similarity could have no adverse effect on the network.