WATMnet: a prototype wireless ATM system for multimedia personal communication

Raychaudhuri, Dipankar; French, L.; Siracusa, R.; Biswas, Subir; Yuan, Rui; Narasimhan, P.; Johnston, C.A.

doi:10.1109/49.553680

Cited by 193 publications

(20 citation statements)

References 11 publications

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“…na qual pea taxa de erro de bit no enlace. Se a decodificac;ao do HEC nao e considerada, Pc e dado por (4) Pelo criterio adotado para definic;iio dos c6digos, tem-se Pee<l maior ou igual a probabilidade de urn enlace 6ptico entregar uma-celula sem erro para 0 pr6ximo enlace 6ptico (P eco ) , resultando em (5) em que a probabilidade P cw e dada pela equa~ao (3), com p igual aprobabilidade de erro de bit no enlace 6ptico.…”

Section: Escolha Dos Codigosunclassified

“…de ARQ [13][15]- [18] e utiliza~ao de FEC com maior capacidade que 0 especificado para 0 HEC (Header Error Control), adaptativo ou nao, para proteger 0 cabe~alho [19]. Os protocolos ARQ mais utilizados sao 0 Go-Back-N (GBN-ARQ) [4] [8] e 0 Selective Repeat (SR-ARQ) [5] [6] [8] (ou alguma variante), enquanto os codigos FEC mais utilizados sao 0 BCH (Bose, Chaudhuri and Hocquenghem) [5][8] [10][13]- [15] [19] e 0 Reed-Solomon [7] [8][11]- [13] [17].…”

Section: Introducaounclassified

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Controle de Erros em Redes ATM sem Fio

Brito¹,

Bonatti²

2005

Journal of Communication and Information Systems

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Resumo As redes ATM (Asvnchronous Transfer Mode) foram concebidas consider;ndo a utiliza«ii'a de meios de transmissiio 6pticos, que apresentam taxa de erro de bit pequena. Urn dos principais problemas de se utilizar 0 ATM em redes sem fio esta relacionado a taxa de erro, que e variavel e pode assumir valores elevados. Para contornar este problema, mecanismos adicionais de controle de erro devem ser inclufdos no enlace ATM sem fio. as esquemas tradicionais de controle de erro siio a corre«iio por retransmissao (ARQ-Automatic Repeat Request) e a corre«iio automatica no receptor do enlace sem fio (FEC Forward Error Correction). a uso de FEC ou ARQ no enlace sem fio da rede ATM resulta na diminui«iio da taxa de erro de bit residual (taxa de erro de bit ap6s a aplica«iio do mecanismo de controle de erro), no aumento do atraso para transmissiio dos pacotes de informa«iio e na diminui«iio da vazao, devido ao overhead dos mecanismos de controle de erro. Neste artigo, compara-se, analiticamente, 0 FEC e 0 ARQ no ambiente das redes ATM sem fio considerando sistemas adaptativos e nao adaptativos e aplica«oes em tempo real e niio tempo real. as criterios de compara«ao utilizados siio: 0 tempo para se transmitir uma PDU (Protocol Data Unit), para aplica«oes de comunica«iio de dados niio tempo real, e, para aplica«oes em tempo real, a vazao e os tempos medio e maximo para se transferir uma celula.

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Section: Escolha Dos Codigosunclassified

Section: Introducaounclassified

Controle de Erros em Redes ATM sem Fio

Brito¹,

Bonatti²

2005

Journal of Communication and Information Systems

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“…Since then, there has been significant work in this area. The software architecture of a wireless ATM base station, MAC/DLC for a wireless ATM link, and preliminary ideas on handoff are presented in [11,27]. Reference [8] describes the hardware design of a wireless ATM NIC card, while [7] reports performance figures for a DLC protocol for CBR and UBR over wireless ATM links.…”

Section: Related Workmentioning

confidence: 99%

Mobility management in wireless ATM networks

Acharya

Li²,

Rajagopalan³

et al. 1997

IEEE Commun. Mag.

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“…In this work, the shared transmission resources are defined to be the slots (packet transmission times) of a time division multiple access (TDMA) frame. This resource structure has been widely considered in personal communication networks (PCN) [1], [2], satellite networks [3], and wireless LAN's [4], as well as in recent work toward the development of wireless ATM networks [5].…”

Section: Introductionmentioning

confidence: 99%

“…In [5], channel access is based on a multiservice dynamic reservation (MDR)-TDMA frame format. At the beginning of each uplink MDR-TDMA frame, a slotted ALOHA control channel is employed for accommodating allocation requests, followed by a number of slots available to service the traffic.…”

Section: Introductionmentioning

confidence: 99%

Achievable QoS in an interference/resource limited shared wireless channel

Capone

Stavrakakis

1999

IEEE J. Select. Areas Commun.

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In this work, the region of achievable quality-ofservice (QoS) is precisely described for a system of real-time heterogeneous variable bit rate (VBR) sources competing for slots (packet transmission times) of a time division multiple access (TDMA) frame. The QoS for each application is defined in terms of a maximum tolerable packet-dropping probability. Packets may be dropped due to delay violations and channel induced errors. The region of achievable QoS is precisely described for an interference/resource limited network by considering the underlying TDMA-multiple access control (TDMA-MAC) structure and the physical channel. A simple QoS-sensitive errorcontrol protocol that combats the effects of the wireless channel while satisfying the real-time requirements is proposed and its impact on the region of achievable QoS is evaluated. The results presented here clearly illustrate the negative impact of a poor channel and the positive impact of the employed error-control protocol on the achievable QoS. The region of achievable QoS vectors is central to the call admission problem, and in this work, it is used to identify a class of scheduling policies capable of delivering any achievable performance.

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WATMnet: a prototype wireless ATM system for multimedia personal communication

Cited by 193 publications

References 11 publications

Controle de Erros em Redes ATM sem Fio

Controle de Erros em Redes ATM sem Fio

Mobility management in wireless ATM networks

Achievable QoS in an interference/resource limited shared wireless channel

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