| Presentation | 2004-11-19 Packet Size Sequence Modeling of Reliable Transmission Window Protocols for Bernoulli Bit-Erroneous Links Takashi Ikegawa, Yukio Takahashi, |
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| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | In this paper, we propose a Markov model which represents size-sequences of two kinds of packets for networks supporting communication protocols that include message-segmentation, error-recovery and window flow control functions (denoted as reliable transmission window protocols: RWPs), such as TCP: packets generated from messages by a sender at the original transmission (namely, generated.packets), and packets contained by frames (i.e., data-link level PDUs) transferred over data-links (referred to as transferred packets). This analytical model makes it possible to discuss the effect of the retransmitted packet size preservation (RPSP-) property, which means that all sizes of transferred packets with the same sequence number at retransmissions are equal to that of the original transmission (identical to generated packet-size). The noticeable effect of the RPSP-property will appear for the networks where the size distribution of generated packets has a large variance and transferred packets are frequently lost with rate dependent on the packet size, as in bit-erroneous link environment. Hence, we present analytical expressions of the mean generated packet size taking message-segmentation function into consideration and of the mean transferred packet size representing the RPSP-property in the environment where bit-errors happen according to Bernoulli bit-error model. Furthermore, we demonstrate numerical results when message sizes are assumed to be exponentially distributed, of which assumption leads the explicit analytical expressions, under different bit-error rates, retransmission schemes, window sizes and payload sizes. The key findings include that the RPSP-property cannot be negligible in the following case: 1) selective retransmission or go-back-TV retransmission with small window sizes is performed, 2) message-segmentation occurrence probability is relatively small, and 3) the bit error rate is high (e.g., 1×10^<-4> the mean bit-error rate of a wireless link in an industrial environment). |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | TCP / Reliable transmission window protocol / Packet size sequence / Bernoulli bit-erroneous link / Retransmitted packet size preservation property / Message-segmentation |
| Paper # | CQ2004-106,MoMuC2004-80 |
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| Committee | MoMuC |
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| Conference Date | 2004/11/12(1days) |
| Place (in Japanese) | (See Japanese page) |
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| Registration To | Mobile Multimedia Communications(MoMuC) |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Packet Size Sequence Modeling of Reliable Transmission Window Protocols for Bernoulli Bit-Erroneous Links |
| Sub Title (in English) | |
| Keyword(1) | TCP |
| Keyword(2) | Reliable transmission window protocol |
| Keyword(3) | Packet size sequence |
| Keyword(4) | Bernoulli bit-erroneous link |
| Keyword(5) | Retransmitted packet size preservation property |
| Keyword(6) | Message-segmentation |
| 1st Author's Name | Takashi Ikegawa |
| 1st Author's Affiliation | NTT Network Service Systems Laboratories, NTT Corporation:Graduate School of Information Science and Engineering, Tokyo Institute of Technology() |
| 2nd Author's Name | Yukio Takahashi |
| 2nd Author's Affiliation | Graduate School of Information Science and Engineering, Tokyo Institute of Technology |
| Date | 2004-11-19 |
| Paper # | CQ2004-106,MoMuC2004-80 |
| Volume (vol) | vol.104 |
| Number (no) | 444 |
| Page | pp.pp.- |
| #Pages | 6 |
| Date of Issue | |