This paper proposes a novel real-time packet rescheduling algorithm using a token-passing protocol to achieve QoS on WDM (Wavelength Division Multiplexing) Ring Access Networks. The proposed rescheduling algorithm is called PEM (PDS-EATS-MTD) algorithm. The PDS (PriorityDifferentiated Scheduling) algorithm deals with real-time packets and allows them to be transmitted first, such that the front line of the prescheduled nonreal-time packets can be inserted into the queue. The EATS (Earliest Available Time Scheduling) algorithm selects the earliest available data channel, independently of the availability of the destination. The MTD (Minimum Time Difference) algorithm selects the minimum-time-to-wait channel to transmit the nonreal-time packet and is quick to establish the path of the real-time packets. The updated information including the Scheduled Data Table and the Channel Available Time Table, is then broadcasting to other access nodes using token-passing protocol to maintain the status of packet scheduling/rescheduling consistency. Overall, the PEM algorithm outperforms NPEM, PEE, and EATS in terms of average delay time for different traffic loads and number of channels.
Keywords: Packet Rescheduling, Token-passing Protocol, Quality of Service, WDM Ring Access Network, PEM Algorithm
REFERENCES
[1] Keepence, B., “Quality of Service for Voice over IP,” in Services Over the Internet—What Does Quality Cost?, Ser. IEE Colloquium, No. 99, pp. 4/14/4 (1999).
[2] Li, B. and Qin, Y., “Traffic Scheduling with Per VC QoS Guarantee in WDM Networks,” IEEE GLOBECOM’98, pp. 339344 (1998).
[3] Jelger, C. S. and Elmirghani, J. M. H., “A Simple MAC Protocol for WDM Metropolitan Access Ring Networks,” IEEE CLOBECOM 2001, Vol. 3, pp. 1500 1504 (2001).
[4] Chu, P. L. and Diao, J., “Packet Rescheduling in WDM Star Networks with Real-time Service Differentiation,” Journal of Lightwave Technology, Vol. 19, pp. 1818 1828, (2001).
[5] Jia, F., Mukherjee, B. and Iness, J., “Scheduling Variable-length Messages in a Single-hop Multichannel Local Lightwave Network,” IEEE/ACM Transactions Networking, Vol. 3, pp. 477488, (1995).
[6] Bengi, K. and Van, H. R. “CONRAD a Novel Medium Access Control Protocol for WDM Local Lightwave Networks Enabling Efficient Convergence of Realtime and Data Services,” Proceedings on Local Computer Networks 2001, pp. 468476 (2001).
[7] Ganguly, B. and Chan, V., “A Scheduled Approach to Optical Flow Switching in the ONRAMP Optical Access Network Testbed,” OFC 2002, pp. 215216 (2002).
[8] Modiano, E. and Barry, R., “A Novel Medium Access Control Protocol for WDM-based LAN’s and Access Networks Using a Master Slave Scheduler,” Journal of Lightwave Technology, Vol. 18, pp. 461468, (2000).
[9] Hwang, I.-S., Lee, S.-N. and Lin, Y.-S., “Stochastic Generative Model of Cost Effective OADM Using the Neural Network in a WDM Access Network,” 1st PNC/ 6th JCIS 2002, pp. 13141318 (2002).
[10] Lee, S.-N. and Hwang, I.-S., “Stochastic Generative Model of Cost-effective OADM Using a Three-dimensional Neural Network in a WDM Access Network,” The Fifth Pacific Rim Conference on Lasers and Electro-Optics (CLEO/PR 2003), pp. 391 (2003).
[11] Takachio, N., Suzuki, H., Fujiwara, M., Jun-ichi Kani, K., Iwatsuki, K., Yamada, H., Shibata, T. and Kitoh, T., “Wide Area Gigabit Access Network Based on 12.5 GHz Spaced 256 Channel Super-dense WDM Technologies,” Electronics Letters, Vol. 37, pp. 309311 (2001).
[12] Mariconda, A. and Merli, S., “An Optical Add-drop Multiplexer (OADM) Node Architecture in a Fully Transparent Self Healing Ring Network,” 22nd European Conference on Optical Communication ECOC’96 (1996).
We use cookies on this website to personalize content to improve your user experience and analyze our traffic. By using this site you agree to its use of cookies.
