The original paper is in English. Non-English content has been machine-translated and may contain typographical errors or mistranslations. ex. Some numerals are expressed as "XNUMX".
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The original paper is in English. Non-English content has been machine-translated and may contain typographical errors or mistranslations. Copyrights notice
Recentemente, a procura por serviços multimédia aplicáveis a redes ad hoc sem fios tem aumentado. Muitos protocolos que suportam QoS (Qualidade de Serviço) definidos pelo ITU H.323 são adequados para o sistema com um coordenador central (ex. ponto de acesso), e não são aplicados a redes ad hoc. Como cada estação móvel envia um pacote aleatoriamente em uma rede sem fio, é necessário evitar uma colisão de pacotes que resulte na diminuição do rendimento do canal. IEEE 802.11 é um padrão para LANs sem fio. O mecanismo básico de acesso em seu protocolo de controle de acesso ao meio (MAC) é a função de coordenação distribuída (DCF) baseada no acesso múltiplo com detecção de portadora com prevenção de colisão (CSMA/CA). Porém, este mecanismo não possui controle de QoS e a colisão de pacotes pode ocorrer frequentemente com o aumento do número de estações móveis. Neste artigo, as duas filas, fila de voz sobre IP (VoIP) e fila de DADOS, são definidas em cada estação móvel, e propomos um novo protocolo MAC usando múltiplas filas para QoS. Nosso esquema consiste em detecção de portadora, agendamento de pacotes e prevenção de colisões, além de melhorar a janela de contenção no DCF. Usamos dois tipos de agendamento de pacotes. Um é o agendamento em uma estação móvel e o outro é o agendamento entre estações móveis. Chamamos o escalonamento proposto entre estações móveis de D2VTS (Programação de Tempo Virtual Duplo Distribuído). Simulações são realizadas para analisar o esquema proposto. Os resultados da simulação mostram que nosso esquema é capaz de transportar tráfego multimídia com desempenho superior comparado ao DCF convencional.
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Masakatsu OGAWA, Takeshi HATTORI, "A Novel Media Access Control Using Multiple Queues for Voice over IP in Ad Hoc Networks--D2VTS Algorithm--" in IEICE TRANSACTIONS on Communications,
vol. E85-B, no. 10, pp. 2136-2144, October 2002, doi: .
Abstract: Recently, demand for multimedia service applicable with wireless ad hoc networks is increasing. Many protocols which support QoS (Quality of Service) defined by ITU H.323 are suitable for the system with a central coordinator (ex. access point), and are not applied to ad hoc networks. Since each mobile station sends a packet randomly in a wireless network, it is necessary to avoid a packet collision which results in the decrement of the channel throughput. IEEE 802.11 is a standard for wireless LANs. The basic access mechanism in its media access control (MAC) protocol is the distributed coordination function (DCF) based on carrier sense multiple access with collision avoidance (CSMA/CA). However, this mechanism does not have QoS control, and packet collision may occur frequently with the increase of the number of mobile stations. In this paper, the two queues, voice over IP (VoIP) queue and DATA queue, are set in each mobile station, and we propose a novel MAC protocol using multiple queues for QoS. Our scheme consists of carrier sensing, packet scheduling and collision avoidance, and improves the contention window in DCF. We use two kinds of packet scheduling. One is the scheduling in a mobile station, and the other is the scheduling among mobile stations. We called the proposed scheduling among mobile stations D2VTS (Distributed Double Virtual Time Scheduling). Simulations are conducted to analyze the proposed scheme. The simulation results show that our scheme is able to carry multimedia traffic with a higher performance compared with the conventional DCF.
URL: https://global.ieice.org/en_transactions/communications/10.1587/e85-b_10_2136/_p
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@ARTICLE{e85-b_10_2136,
author={Masakatsu OGAWA, Takeshi HATTORI, },
journal={IEICE TRANSACTIONS on Communications},
title={A Novel Media Access Control Using Multiple Queues for Voice over IP in Ad Hoc Networks--D2VTS Algorithm--},
year={2002},
volume={E85-B},
number={10},
pages={2136-2144},
abstract={Recently, demand for multimedia service applicable with wireless ad hoc networks is increasing. Many protocols which support QoS (Quality of Service) defined by ITU H.323 are suitable for the system with a central coordinator (ex. access point), and are not applied to ad hoc networks. Since each mobile station sends a packet randomly in a wireless network, it is necessary to avoid a packet collision which results in the decrement of the channel throughput. IEEE 802.11 is a standard for wireless LANs. The basic access mechanism in its media access control (MAC) protocol is the distributed coordination function (DCF) based on carrier sense multiple access with collision avoidance (CSMA/CA). However, this mechanism does not have QoS control, and packet collision may occur frequently with the increase of the number of mobile stations. In this paper, the two queues, voice over IP (VoIP) queue and DATA queue, are set in each mobile station, and we propose a novel MAC protocol using multiple queues for QoS. Our scheme consists of carrier sensing, packet scheduling and collision avoidance, and improves the contention window in DCF. We use two kinds of packet scheduling. One is the scheduling in a mobile station, and the other is the scheduling among mobile stations. We called the proposed scheduling among mobile stations D2VTS (Distributed Double Virtual Time Scheduling). Simulations are conducted to analyze the proposed scheme. The simulation results show that our scheme is able to carry multimedia traffic with a higher performance compared with the conventional DCF.},
keywords={},
doi={},
ISSN={},
month={October},}
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TY - JOUR
TI - A Novel Media Access Control Using Multiple Queues for Voice over IP in Ad Hoc Networks--D2VTS Algorithm--
T2 - IEICE TRANSACTIONS on Communications
SP - 2136
EP - 2144
AU - Masakatsu OGAWA
AU - Takeshi HATTORI
PY - 2002
DO -
JO - IEICE TRANSACTIONS on Communications
SN -
VL - E85-B
IS - 10
JA - IEICE TRANSACTIONS on Communications
Y1 - October 2002
AB - Recently, demand for multimedia service applicable with wireless ad hoc networks is increasing. Many protocols which support QoS (Quality of Service) defined by ITU H.323 are suitable for the system with a central coordinator (ex. access point), and are not applied to ad hoc networks. Since each mobile station sends a packet randomly in a wireless network, it is necessary to avoid a packet collision which results in the decrement of the channel throughput. IEEE 802.11 is a standard for wireless LANs. The basic access mechanism in its media access control (MAC) protocol is the distributed coordination function (DCF) based on carrier sense multiple access with collision avoidance (CSMA/CA). However, this mechanism does not have QoS control, and packet collision may occur frequently with the increase of the number of mobile stations. In this paper, the two queues, voice over IP (VoIP) queue and DATA queue, are set in each mobile station, and we propose a novel MAC protocol using multiple queues for QoS. Our scheme consists of carrier sensing, packet scheduling and collision avoidance, and improves the contention window in DCF. We use two kinds of packet scheduling. One is the scheduling in a mobile station, and the other is the scheduling among mobile stations. We called the proposed scheduling among mobile stations D2VTS (Distributed Double Virtual Time Scheduling). Simulations are conducted to analyze the proposed scheme. The simulation results show that our scheme is able to carry multimedia traffic with a higher performance compared with the conventional DCF.
ER -