Abstract
The IEEE 802.11e standard was proposed to guarantee QoS in the MAC layer. It uses new HCF(Hybrid Coordination Function) protocol, which is composed of two access functions: A distributed contention-based channel access function(EDCA) providing prioritized QoS and a centralized polling-based channel access function(HCCA) providing parameterized QoS. In this paper, we propose a new scheduling algorithm to improve the performance of HCCA. The proposed scheduler guarantees QoS by changing suitably service intervals and transmission opportunities. The service schedule is based not only on the TSPEC parameters of a flow but also on the traffic queueing. Simulation results show that the proposed scheduling algorithm is superior to the reference scheduler and SETT-EDD scheduler in terms of throughput, end-to-end delay and jitter.
This work was supported by the new faculty research fund of Ajou University.
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References
IEEE Std, IEEE standard for wireless LAN medium access control (MAC) and physical (PHY) specification (1999)
IEEE Std 802.11e/D13.0, Draft supplement to standard for telecommunications and information exchange between systems-LAN/MAN specific requirements. Part 11: Wireless medium access control (MAC) and physical layer (PHY) specifications: Medium access control (MAC) enhancements for quality of service (QoS) (April 2005)
del Prado, J., Soomro, A., Shankar, S.: Normative Text for TGe Consensus Proposal. IEEE 802.11-02/612r0 (September 2002)
Prado, J.: Mandatory TSPEC Parameters and Reference Design of a Simple Scheduler. IEEE 802.11-02/705ar0 (November 2002)
del Prado, J., Soomro, A., Shankar, S.: TGe Scheduler - Minimum Performance Requirements. IEEE 802.11-02/ 709r0 (November 2002)
Skyrianoglou, D., Salkintzis, A.: Traffic Scheduling for Multimedia QoS over Wireless LANs. In: Proc. of IEEE ICC, May 2005, vol. 2, pp. 1266–1270 (2005)
Ansel, P., Ni, Q., Turletti, T.: An Efficient Scheduling Scheme for IEEE 802.11e. In: Proc. Modeling and Optimization in Mobile, Ad Hoc and Wireless Networks (2004)
Grilo, A., Macedo, M., Nunes, M.: A Scheduling Algorithm for QoS Support in IEEE 802.11E Networks. IEEE Wireless Commun., 36–43 (June 2003)
Skyrianoglou, D., Passas, N., Salkintzis, A.K.: ARROW: An Efficient Traffic Scheduling Algorithm for IEEE 802.11e HCCA. IEEE Transactions on Wireless Commun. 5(12), 3558–3567 (2006)
Stankovic, J., et al.: Deadline Scheduling for real-time Systems: EDF and Related Algorithms. Kluwer, Dordrecht (1998)
Ferrari, D., Verma, D.: A Scheme for Real-time Channel Establishment in Wide-Area Networks. IEEE JSAC 8(3), 368–379 (1990)
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Lee, DY., Kim, SR., Lee, CW. (2009). An Enhanced EDD QoS Scheduler for IEEE 802.11e WLAN. In: Kim, Th., et al. Advances in Computational Science and Engineering. FGCN 2008. Communications in Computer and Information Science, vol 28. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-10238-7_4
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DOI: https://doi.org/10.1007/978-3-642-10238-7_4
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