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dc.contributor.authorSallent Roig, José Oriol
dc.contributor.authorAgustí Comes, Ramon
dc.contributor.otherUniversitat Politècnica de Catalunya. Departament de Teoria del Senyal i Comunicacions
dc.date.accessioned2016-12-16T15:17:20Z
dc.date.available2016-12-16T15:17:20Z
dc.date.issued2000-05
dc.identifier.citationSallent, J., Agusti, R. Adaptive s-aloha cdma as an alternative way of integrating services in mobile environments. "IEEE transactions on vehicular technology", Maig 2000, vol. 49, núm. 3, p. 1-12.
dc.identifier.issn0018-9545
dc.identifier.urihttp://hdl.handle.net/2117/98482
dc.description.abstractCode-division multiple-access (CDMA) schemes appear to be very promising access techniques for coping with the requirements of third-generation mobile systems, mainly because of their flexibility. This paper proposes an adaptive S-ALOHA DS-CDMA access scheme as a method for integrating nonreal-time (i.e., Internet applications) and real-time (i.e., voice) services in a multicell scenario by exploiting the potentials of CDMA under time-varying channel load conditions. The adaptive component makes data terminals autonomously change their transmission rate according to the total (voice+data) channel occupancy, so that the minimum possible data delay, which can be analytically obtained by defining a birth-death process, is almost always achieved. Moreover, by means of a simplified cellular model, the proposed algorithm revealed the same behavior, i.e., it tries to select the most suitable transmission rate at any time slot, when it is affected by intercell interference and even by power control imperfections. Finally, in order to gain more insight into the potentials of such an access strategy, the adaptive S-ALOHA CDMA scheme is then compared to a reservation time-division multiple-access (TDMA)-based protocol (PRMA++), showing the benefits of the CDMA-based solution in terms of capacity, flexibility, and data delay performance.
dc.format.extent12 p.
dc.language.isoeng
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/3.0/es/
dc.subjectÀrees temàtiques de la UPC::Enginyeria de la telecomunicació
dc.subject.lcshTelecommunication
dc.subject.otherPacket reservation multiple access
dc.subject.otherAdaptive systems
dc.subject.otherCode division multiple access
dc.subject.otherCellular radio
dc.subject.otherTelecommunication services
dc.subject.otherTime-varying channels
dc.subject.otherMultiuser channels
dc.subject.otherDelays
dc.subject.otherIntegrated voice/data communication
dc.subject.otherRadiofrequency interference
dc.subject.otherTime division multiple access
dc.titleAdaptive s-aloha cdma as an alternative way of integrating services in mobile environments
dc.typeArticle
dc.subject.lemacTelecomunicació
dc.contributor.groupUniversitat Politècnica de Catalunya. GRCM - Grup de Recerca en Comunicacions Mòbils
dc.identifier.doi10.1109/25.845110
dc.description.peerreviewedPeer Reviewed
dc.relation.publisherversionhttp://ieeexplore.ieee.org.recursos.biblioteca.upc.edu/document/845110/
dc.rights.accessOpen Access
drac.iddocument802023
dc.description.versionPostprint (published version)
upcommons.citation.authorSallent, J., Agusti, R.
upcommons.citation.publishedtrue
upcommons.citation.publicationNameIEEE transactions on vehicular technology
upcommons.citation.volume49
upcommons.citation.number3
upcommons.citation.startingPage1
upcommons.citation.endingPage12


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