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".
Copyrights notice
The original paper is in English. Non-English content has been machine-translated and may contain typographical errors or mistranslations. Copyrights notice
É bem conhecido que o TCP frequentemente sofre grave degradação de desempenho em redes móveis, uma vez que perdas de pacotes não relacionadas ao congestionamento da rede ocorrem frequentemente devido à mobilidade do host. Neste artigo, propomos um novo método de buffer de pacotes para resolver tal problema sem o problema de escalabilidade em redes baseadas em IP móvel. Para tanto, primeiro investigamos o desempenho do TCP Tahoe sem considerar o buffer de pacotes por meio da simulação. Nosso resultado de simulação mostra que, na maioria dos casos, o handoff suave pela extensão de otimização de rota do padrão Mobile IP não pode impedir a degradação do desempenho do TCP devido aos handoffs, embora seja projetado para reduzir o número de pacotes descartados durante o handoff. Ele também mostra que ao utilizar a extensão de otimização de rota, o desempenho do TCP às vezes se torna pior até mesmo do que no caso do IP Móvel base, a menos que sua transferência suave faça com que menos de quatro pacotes sejam descartados durante a transferência. Tais resultados significam que, pelo menos para TCP, o handoff suave não é útil, a menos que a extensão de otimização de rota suporte o método de buffering, que faz com que os handoffs sejam transparentes para os protocolos da camada de transporte, recuperando os pacotes descartados durante o handoff. Em seguida, investigamos os efeitos do buffer de pacotes no desempenho do TCP. Modificamos a extensão de otimização de rota para suportar o buffer de pacotes na estação base, mas é uma alteração muito pequena. Por fim, discutimos alguns problemas que devem ser abordados para recuperar os pacotes descartados durante o handoff pelo método de buffering sem causar um impacto pior no desempenho do TCP, e propomos nossa solução para resolver esses problemas.
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Doo Seop EOM, Masashi SUGANO, Masayuki MURATA, Hideo MIYAHARA, "Performance Improvement by Packet Buffering in Mobile IP Based Networks" in IEICE TRANSACTIONS on Communications,
vol. E83-B, no. 11, pp. 2501-2512, November 2000, doi: .
Abstract: It is well-known that TCP often experiences severe performance degradation in mobile networks since packet losses not related to network congestion occur frequently due to host mobility. In this paper, we propose a new packet buffering method to address such a problem without the scalability problem in Mobile IP based networks. For this purpose, we first investigate the performance of TCP Tahoe without considering packet buffering through the simulation. Our simulation result shows that in most cases, the smooth handoff by the route optimization extension of Mobile IP standard cannot prevent the degradation of TCP performance due to handoffs, although it is designed to reduce the number of packets dropped during the handoff. It also shows that in utilizing the route optimization extension, the TCP performance sometimes becomes worse even than the case of the base Mobile IP unless its smooth handoff makes less than four packets be dropped during the handoff. Such results mean that at least for TCP, the smooth handoff is not useful unless the route optimization extension supports the buffering method, which makes handoffs be transparent to transport layer protocols by recovering the packets dropped during the handoff. We then investigate the effects of packet buffering on the performance of TCP. We modify the route optimization extension in order to support packet buffering at the base station, but it is a very minor change. Finally, we discuss some problems that should be addressed to recover the packets dropped during the handoff by the buffering method without giving a worse impact on the performance of TCP, and propose our solution to solve those problems.
URL: https://global.ieice.org/en_transactions/communications/10.1587/e83-b_11_2501/_p
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@ARTICLE{e83-b_11_2501,
author={Doo Seop EOM, Masashi SUGANO, Masayuki MURATA, Hideo MIYAHARA, },
journal={IEICE TRANSACTIONS on Communications},
title={Performance Improvement by Packet Buffering in Mobile IP Based Networks},
year={2000},
volume={E83-B},
number={11},
pages={2501-2512},
abstract={It is well-known that TCP often experiences severe performance degradation in mobile networks since packet losses not related to network congestion occur frequently due to host mobility. In this paper, we propose a new packet buffering method to address such a problem without the scalability problem in Mobile IP based networks. For this purpose, we first investigate the performance of TCP Tahoe without considering packet buffering through the simulation. Our simulation result shows that in most cases, the smooth handoff by the route optimization extension of Mobile IP standard cannot prevent the degradation of TCP performance due to handoffs, although it is designed to reduce the number of packets dropped during the handoff. It also shows that in utilizing the route optimization extension, the TCP performance sometimes becomes worse even than the case of the base Mobile IP unless its smooth handoff makes less than four packets be dropped during the handoff. Such results mean that at least for TCP, the smooth handoff is not useful unless the route optimization extension supports the buffering method, which makes handoffs be transparent to transport layer protocols by recovering the packets dropped during the handoff. We then investigate the effects of packet buffering on the performance of TCP. We modify the route optimization extension in order to support packet buffering at the base station, but it is a very minor change. Finally, we discuss some problems that should be addressed to recover the packets dropped during the handoff by the buffering method without giving a worse impact on the performance of TCP, and propose our solution to solve those problems.},
keywords={},
doi={},
ISSN={},
month={November},}
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TY - JOUR
TI - Performance Improvement by Packet Buffering in Mobile IP Based Networks
T2 - IEICE TRANSACTIONS on Communications
SP - 2501
EP - 2512
AU - Doo Seop EOM
AU - Masashi SUGANO
AU - Masayuki MURATA
AU - Hideo MIYAHARA
PY - 2000
DO -
JO - IEICE TRANSACTIONS on Communications
SN -
VL - E83-B
IS - 11
JA - IEICE TRANSACTIONS on Communications
Y1 - November 2000
AB - It is well-known that TCP often experiences severe performance degradation in mobile networks since packet losses not related to network congestion occur frequently due to host mobility. In this paper, we propose a new packet buffering method to address such a problem without the scalability problem in Mobile IP based networks. For this purpose, we first investigate the performance of TCP Tahoe without considering packet buffering through the simulation. Our simulation result shows that in most cases, the smooth handoff by the route optimization extension of Mobile IP standard cannot prevent the degradation of TCP performance due to handoffs, although it is designed to reduce the number of packets dropped during the handoff. It also shows that in utilizing the route optimization extension, the TCP performance sometimes becomes worse even than the case of the base Mobile IP unless its smooth handoff makes less than four packets be dropped during the handoff. Such results mean that at least for TCP, the smooth handoff is not useful unless the route optimization extension supports the buffering method, which makes handoffs be transparent to transport layer protocols by recovering the packets dropped during the handoff. We then investigate the effects of packet buffering on the performance of TCP. We modify the route optimization extension in order to support packet buffering at the base station, but it is a very minor change. Finally, we discuss some problems that should be addressed to recover the packets dropped during the handoff by the buffering method without giving a worse impact on the performance of TCP, and propose our solution to solve those problems.
ER -