Scheduling Algorithms for Packet-Oriented MAC Protocols in Wireless Multimedia Systems |
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Authors: | Romano Fantacci Giovanni Giambene Francesco Petiti |
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Affiliation: | (1) Dipartimento di Elettronica e Telecomunicazioni, Università degli Studi di Firenze, Via S. Marta, 3 – 50139 Firenze, Italy;(2) Dipartimento di Ingegneria dell'Informazione, Università degli Studi di Siena, Via Roma, 56 – 53100 Siena, Italy;(3) Alcatel Italia, Via Provinciale Lucchese, Firenze, Italy |
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Abstract: | Future generation wireless multimediacommunications will require efficient Medium AccessControl (MAC) protocols able to guarantee suitable Qualityof Service (QoS) levels for different traffic classes whileachieving a high utilization of radio resources. This paperproposes a new scheduling technique to be adopted at the MAClevel in wireless access systems, named Dynamic Scheduling-Time DivisionDuplexing (DS-TDD), that efficiently managesvideo, voice, Web and background traffics. A theoretical approachis proposed in this paper to evaluate the DS-TDD performance withvoice and Web traffics. Simulation results have permitted tohighlight the following promising characteristics of the DS-TDDscheme: (i) a high capacity of real-time traffics isattained with a QoS insensitive to Web and background trafficloads; (ii) a high throughput can be guaranteed whilepreserving the QoS levels of the different traffic classes;(iii) heavier downlink traffic loads do not modify the QoSof uplink traffics. Finally, extensive comparisons with differentscheduling schemes proposed in the literature have permitted tohighlight the better performanceof DS-TDD. |
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Keywords: | broadband wireless communications medium access control protocols scheduling techniques |
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