Abstract:
The IEEE 802.1Qcr Asynchronous Traffic Shaping (ATS) proposed by Time-Sensitive Network (TSN) is a flow control mechanism based on Urgency-based Scheduler (UBS). The ATS ...Show MoreMetadata
Abstract:
The IEEE 802.1Qcr Asynchronous Traffic Shaping (ATS) proposed by Time-Sensitive Network (TSN) is a flow control mechanism based on Urgency-based Scheduler (UBS). The ATS aims to reshape flows or traffic per-hop and is still with the update of the draft.In the draft of version 2.0, the ATS algorithm concerns about two parameters cir (Committed Information Rate) and cbs (Committed Burst Size). When an ATS shaper operates in the condition of parameter consistency, i.e. the cir and the cbs have the same values of the ingress flow's rate and burstiness respectively, the burst cascade can be avoided perfectly.On the contrary, we introduced a deterministic Network Calculus (NC) based method to compute the delay bound for an ATS hop with parameter inconsistency, with a concatenation model of this ATS shaper and its upstream Strict Priority Queuing (SPQ) scheduler. Furthermore, we induced a threshold for the cbs parameter corresponding to a certain ingress busrtiness. When the cbs of ATS is not equal to the threshold value, the delay bound of the flows shaped by the shaper will increase. In addition, the results of analysis and case study show that when the cbs of the ATS is changed, the delay bounds of other multiplexing flows will also be affected.
Date of Conference: 28-31 October 2020
Date Added to IEEE Xplore: 24 December 2020
ISBN Information: