论文信息 - G-RDM: A New Bandwidth Constraints Model for DS-TE Networks

G-RDM: A New Bandwidth Constraints Model for DS-TE Networks

MPLS traffic engineering (TE) allows the creation of end-to-end paths across the network with bandwidth reservations. The main drawback of the basic MPLS-TE model is that it operates at an aggregate level and so it is unaware of traffic classes. DiffServ-aware MPLS-TE (DS- TE) refines the MPLS-TE model by allowing bandwidth reservations to be carried out on a per-class basis. The result is the ability to give strict QoS guarantees while optimizing the use of network resources. Bandwidth constraints models play a key role in the DS-TE architecture, since they establish how bandwidth is distributed among different classes. In this paper, we first present a new bandwidth constraints model, called G-RDM. Then, we compare the performance of G-RDM with respect to MAM and RDM in different scenarios by means of an analytical model based on Markov-chains. The results show that G-RDM, joining the best features of MAM and RDM, allows to improve their performance.

[1] David L. Black,et al. An Architecture for Differentiated Service , 1998 .

[2] Daniel O. Awduche,et al. Requirements for Traffic Engineering Over MPLS , 1999, RFC.

[3] Francois Le Faucheur,et al. Russian Dolls Bandwidth Constraints Model for Diffserv-aware MPLS Traffic Engineering , 2005, RFC.

[4] Wai Sum Lai,et al. Requirements for Support of Differentiated Services-aware MPLS Traffic Engineering , 2003, RFC.

[5] Eric C. Rosen,et al. Multiprotocol Label Switching Architecture , 2001, RFC.

[6] Wai Sum Lai,et al. Traffic engineering for MPLS , 2002, SPIE ITCom.

[7] Wai Sum Lai,et al. Maximum Allocation Bandwidth Constraints Model for Diffserv-aware MPLS Traffic Engineering , 2005, RFC.

[8] Francois Le Faucheur,et al. Protocol Extensions for Support of Diffserv-aware MPLS Traffic Engineering , 2005, RFC.

[9] Wai Sum Lai,et al. Bandwidth Constraints Models for Differentiated Services (Diffserv)-aware MPLS Traffic Engineering: Performance Evaluation , 2005, RFC.

[10] Jerry Ash,et al. Max Allocation with Reservation Bandwidth Constraints Model for Diffserv-aware MPLS Traffic Engineering & Performance Comparisons , 2005, RFC.