Analysis of Delay Characteristics in MPsLS Forwarding Scheme

Jun YANG  Yasushi HIBINO  

IEICE TRANSACTIONS on Communications   Vol.E89-B   No.6   pp.1738-1746
Publication Date: 2006/06/01
Online ISSN: 1745-1345
DOI: 10.1093/ietcom/e89-b.6.1738
Print ISSN: 0916-8516
Type of Manuscript: PAPER
Category: Switching for Communications
QoS,  MPsLS,  synchronization,  frame,  appointed channel,  filler channel,  

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The delay characteristics of the MPsLS, a data forwarding scheme used for a core area of the integrated data service network, are discussed and analyzed. MPsLS has the capability of guaranteeing QoS on the per-flow level for time-sensitive applications and simultaneously maintaining the high utilization of network resources. In the MPsLS core area, the forwarding process is implemented with a fine-grain slot synchronization model, and at the ingress edge nodes, the forwarding process is carried with a coarse-grain frame synchronization model. The delay analyses are done according to three service models: the exact synchronization model, the less strict synchronization model for the appointed channels, and an asynchronous model for the filler channels. The authors give estimation equations of mean delay between edge-to-edge nodes in an MPsLS network, and introduce an effective method to determine the reserved bandwidth for given application flows based on numerical calculations from those theory analysis and simple simulation results.