Advance and Immediate Request Admission: A Preemptable Service Definition for Bandwidth Brokers


  • Ibrahim Taner Okumus K.Maras Sutcu Imam University, Computer Engineering Department Avsar Kampusu, 46000, K.Maras, Turkey
  • Ferhat Umut Dizdar Mugla University, Graduate School of Science Kotekli Kampusu, 48000, Mugla, Turkey


admission control, IR Flows, AR flows, preemptable forwarding service, quality of services


Differentiated Services Architecture lacks control level functionalities and Bandwidth Brokers are proposed to fill that gap. In order to provide proper control level functionalities, Bandwidth Brokers need to provide services for both advance requests and immediate requests. There is a tradeoff between preemption of immediate flows and utilization of links. It is important for a resource manager to provide the promised QoS level to a flow without any preemption. In this study, we solve the preemption and the experienced QoS problem by defining a preemptable service and explain how this service works and also show the performance and scalability characteristics of resource manager with the addition of a preemptable service.


Blake, S., An Architecture for Differentiated Services, RFC 2475, 1998

Nichols K., Jacobson V., Zhang L., A Two-bit Differentiated Services Architecture for the nternet, RFC 2638, 1999

Mantar H.A., Okumus Ã.T., Hwang J., Chapin S.J., A Scalable Intra-Domain Resource anagement Architecture for Diffserv Networks, Journal of High Speed Networks, 15, 185- 05, 2006

Jacobson V., Nichols K., Poduri K., An Expedited Forwarding PHB, RFC 2598, 1999

Heinanen, Assured Forwarding PHB Group, RFC 2598, 1999

Schelen O., Pink S., Resource Sharing in Advance Request Agents, Journal of High Speed etworks: Special issue on Multimedia Networking, 7(3-4):213-228, 1998

Lin Y., Chang C., Hsu Y., Bandwidth Brokers of Instantenaous and Book-ahead Requests for ifferentiated Services Networks, ICICE Transactions on Communication, E85-B, No.1,278- 83, 2002

Ahmad I., Kamruzzaman J., Aswathanarayaniah S., A Dynamic Approach to Reduce Preemption, n Book-ahead Reservation in QoS-Enabled Networks, Computer Communications, 9(9):1443-1457, 2006

Degermark M., Advance reservationss for Predictive Service in the Internet, Multimedia ystems, 5(3):177-186, 1997

Greenberg A.G., Srikant R., Whitt W., Resource Sharing for Book -Ahead and Instantaneous-Request Calls, IEEE/ACM Transactions on Networking, 7(1):10-22, 1999

Srikant R., Whitt W., Resource Sharing for Book-Ahead and Instantaneous-Request Calls sing a CLT Approximation, Telecommunication Systems, 16(3-4):233-253, 2001

Karsten M., Beries N., Wolf L., steinmetz R., A Policy-Based Service Specification for esource Reservation in Advance, Proceedings of the International Conference on Computer ommunications (ICCC'99), Tokyo, Japan, 82-88, Sept 1999

Ahmad I., Kamruzzaman J., Preemption Policy in QoS-Enabled Networks: A Customer entric Approach, Journal of Research and Practice in Information technology, 39(1):61-79, 007

Adamson A. et al., QBone Signaling Design Team final Report", Internet2 QBone SinalingWorkgroup, ttp://, Jul 2002

The Network Simulator - ns-2,



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