AllocTC-Sharing: A New Bandwidth Allocation Model for DS-TE Networks

TL;DR

AllocTC-Sharing introduces a flexible bandwidth allocation model for DS-TE networks that allows dynamic sharing among traffic classes, enhancing link utilization while maintaining QoS guarantees.

Contribution

The paper proposes a novel dual sense bandwidth sharing model for DS-TE networks that improves utilization without violating class-specific bandwidth constraints.

Findings

Enhanced link utilization through dynamic sharing

Preservation of bandwidth constraints for all classes

Improved network efficiency with QoS guarantees

Abstract

DiffServ-aware MPLS-TE (DS-TE) allows bandwidth reservation for Traffic Classes (TCs) in MPLS-based engineered networks and, as such, improves the basic MPLS-TE model. In DS-TE networks, per-Class quality of service guarantees are provided while being possible to achieve improved network utilization. DS-TE requires the use of a Bandwidth Allocation Model (BAM) that establishes the amount of bandwidth per-Class and any eventual sharing among them. This paper proposes a new bandwidth allocation model (AllocTC-Sharing) in which the higher priority traffic classes are allowed to use non allocated resources of lower priority traffic classes and vice versa. By adopting this dual sense allocation strategy for dynamic bandwidth allocation, it is shown that AllocTC-Sharing model preserves bandwidth constraints for traffic classes and improves overall link utilization.