Opportunistic multicasting scheduling using erasure correction coding over wireless channels
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Opportunistic multicasting scheduling using erasure correction coding over wireless channels
Opportunistic Multicasting Scheduling using Erasure-Correction Coding over Wireless ChannelsDang Quang LeDepartment of Electrical and Computer Enginee Opportunistic multicasting scheduling using erasure correction coding over wireless channels eringMcGill University Montreal, Quebec, Canada Aug. 27, 2010A thesis submitted to McGill University in partial fulfillment of the requirements for the degree of Master of Engineering. ©Copyright 2010 All rights reserved.ABSTRACTIn wireless communications, the broadcast nature can be explored to eff Opportunistic multicasting scheduling using erasure correction coding over wireless channels iciently support multicast sei-vices while the difference in channel gains among the wireless links of users promoles multiuser diversity which can heOpportunistic multicasting scheduling using erasure correction coding over wireless channels
used to improve multicast performance. This thesis proposes an opportunistic multicast scheduling scheme using erasure-correction coding to jointly eOpportunistic Multicasting Scheduling using Erasure-Correction Coding over Wireless ChannelsDang Quang LeDepartment of Electrical and Computer Enginee Opportunistic multicasting scheduling using erasure correction coding over wireless channels users in the multicast group al a selected transmission threshold on lime/ITequency slots and using erasure-correction coding to recover erased packets when the instantaneous signal-to-noise ratio (SNR) of the link between the Base Station and a user is insufficient.On flat fading channel, an analyt Opportunistic multicasting scheduling using erasure correction coding over wireless channels ical framework is developed to establish the optimum selection of transmission threshold and erasure-correction code rate to achieve the best multicasOpportunistic multicasting scheduling using erasure correction coding over wireless channels
t throughput on different fading conditions. Numerical results show that the proposed scheme outperforms both the Worst-User and Best-User schemes forOpportunistic Multicasting Scheduling using Erasure-Correction Coding over Wireless ChannelsDang Quang LeDepartment of Electrical and Computer Enginee Opportunistic multicasting scheduling using erasure correction coding over wireless channels h SNR region. Moreover, to study the role of channel knowledge, the proposed scheme is considered in two cases: (i) with full channel gain knowledge and (ỈỈ) with only partial knowledge of lading type and average SNR. Our study indicates that lull channel knowledge is beneficial lor small multicast Opportunistic multicasting scheduling using erasure correction coding over wireless channels groups but al large group Size it is sufficient to have partial channel knowledge as the difference in achievable throughput between the two cases isOpportunistic multicasting scheduling using erasure correction coding over wireless channels
just marginal.The proposed scheme is further extended for applications to Orthogonal frequency Division Multiplexing systems to take advantage of freqOpportunistic Multicasting Scheduling using Erasure-Correction Coding over Wireless ChannelsDang Quang LeDepartment of Electrical and Computer Enginee Opportunistic multicasting scheduling using erasure correction coding over wireless channels king useiiiof frequency diversity, significant delay reduction can be achieved with minimal penalty on multicast throughput.ABRÉGÉDans les communications sans-fil, la diffusion se prête naturellement aux services efficaces de multidiffusion tandis que les variations des gains de canal, parml les lie Opportunistic multicasting scheduling using erasure correction coding over wireless channels ns avec les dittérents utillsateurs, permettent de promouvoir la diversite multiutilisateur qui peut être utilisée pour améliorer la performance de muOpportunistic multicasting scheduling using erasure correction coding over wireless channels
ltidiffusion. Ce mémoire propose une méthode d'ordonnancement multidiffusion opportuniste en utlllsant un code correcteur d'effacement pour exploiter Opportunistic Multicasting Scheduling using Erasure-Correction Coding over Wireless ChannelsDang Quang LeDepartment of Electrical and Computer Enginee Opportunistic multicasting scheduling using erasure correction coding over wireless channels l. La méthode proposée n'envoie qu'une seule copie, sur les créneaux temporels et spectraux, à un seuil de transmission sélectlonné pour tons les utihsateurs appartenant au groupe de multidiffusion et en utilisant un code correcteur d'effacement pour récupérer les paquets effaces lorsque le rapport Opportunistic multicasting scheduling using erasure correction coding over wireless channels signal sur bruit (SNR) ỉnstantané du Hen entre Station de Base et un utillsateur est Insuffisant.Sur un canal à évanouissement uniforme, un cadre analOpportunistic multicasting scheduling using erasure correction coding over wireless channels
ytique est développé pour établỉr la sélectỉon optimale du seull de transmission et le taux de codage à effacement pour atteindre le meilleur debit deOpportunistic Multicasting Scheduling using Erasure-Correction Coding over Wireless ChannelsDang Quang LeDepartment of Electrical and Computer Enginee Opportunistic multicasting scheduling using erasure correction coding over wireless channels nce à la fols les methodes Pire-Utilisateur et Meilleur-Utilisateur pour une ample plage de SNR. Les résultats montrent aussi que la diversite multiutlllsateur est supérỉeure à bas SNR tandls que le gain multidiffusion est plus significatif à haut SNR. De plus, pour étudier le role de la connaissanc Opportunistic multicasting scheduling using erasure correction coding over wireless channels e du canal, la méthode proposée est consỉdérée pour deux cas: (1) avec connaỉssance complète du canal et (11) avec seulement line connalssance partielOpportunistic multicasting scheduling using erasure correction coding over wireless channels
le du type d'evanouissement et SNR moyen. Notre étude indique que la connaissance complete du canal est avantageuse pour les petits groupes multiutlHsOpportunistic Multicasting Scheduling using Erasure-Correction Coding over Wireless ChannelsDang Quang LeDepartment of Electrical and Computer Enginee Opportunistic multicasting scheduling using erasure correction coding over wireless channels x cas est marginale.La méthode proposée est généralỉsée pour être appliquée aux systèmes de multiplexage par répartỉtion orthogonale de la frequence (OFDM) quỉ permettent de profiler de la diversité spectrale dans un milieu à évanouỉssement progress!!' de frequences. Notre étude sur 1’effet de la co Opportunistic multicasting scheduling using erasure correction coding over wireless channels rrélatỉon spectrale sur le débit de multidiffusion montre qu’en utllisant la diversite spectrale, une reduction significative du délai est atteignableOpportunistic multicasting scheduling using erasure correction coding over wireless channels
tout en minỉmỉsant 1‘effet sur le débỉt de multidiffusion.ViOpportunistic Multicasting Scheduling using Erasure-Correction Coding over Wireless ChannelsDang Quang LeDepartment of Electrical and Computer EngineeOpportunistic Multicasting Scheduling using Erasure-Correction Coding over Wireless ChannelsDang Quang LeDepartment of Electrical and Computer EngineeGọi ngay
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