A scalable QoS routing model for diffserv over MPLS networks

Abstract

In this paper, we present a new Quality of Service (QoS) routing model for Differentiated Services (Diffserv) over Multiprotocol Label Switching (MPLS) networks. We use a pre-established multi-path model in which several MPLS label switching paths (LSPs) are established between each ingress-egress router pair in advance. Ingress routers perform per-request admission control and bulk-type resource reservation based on the resource availability on the associated LSPs. We use a utilization-based dynamic load balancing scheme to increase resource utilization across LSPs. The proposed model increases signaling and state scalability in the network core. It also provides hard QoS guarantees and minimizes admission control time. The experimental results verify the achievements of our model under various network topologies and traffic conditions.

Design and evaluation of inter‐bandwidth broker signaling

“…In online, the BB task for intra-domain admission control is limited to direct access of this database. Note that since this work focuses only on inter-domain BB issues, we do not address the intra-domain resource management problems (the interested readers are referred to [5,8]). …”

“…There is a possibility that no single path can support the aggregated pipe due to the lack of resources. In [5,8,23], a multi-path model has been proposed to solve this problem. In multi-path model, several pipes (MPLS path) are pre-established between each ingress-egress router pair and the aggregated traffic is sent over multiple paths.…”

“…When the load portion of paths is changed, some flows may be switched among paths, thus causing out of order deliver. However, the experiments have shown that this possibility is very low [5,8,23]. The average number of times that a flow is switched among the possible paths during its duration is 2.4.…”

“…This means that only several packets (e.g. [15][16][17][18][19][20] may be delivered out of order [8].…”

The IPv6 QoS system implementation in virtual infrastructure

“…The IPv6 QoS system applies main functional blocks of NGN and DiffServ architectures [4][5][6] defined by ITU-T and IETF, respectively. However, comparing with proposals described in the literature e.g.…”