Effect of retransmitted packet size preservation property for wireless networks with a reliable communication protocol

  • Authors:
  • T. Ikegawa;Y. Takahashi

  • Affiliations:
  • NTT Corporation, Musashino-shi, Tokyo, Japan;Tokyo Institute of Technology, Meguro-ku, Tokyo, Japan

  • Venue:
  • MSWiM '05 Proceedings of the 8th ACM international symposium on Modeling, analysis and simulation of wireless and mobile systems
  • Year:
  • 2005

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Abstract

In this paper, we analyze the effect of the retransmitted packet size preservation (RPSP) property. RPSP says that all transferred packets at (re-)transmissions (namely, transferred packets) have the same size as at the original transmission, that is, identical to the packet generated from a message (i.e., a generated packet), over wireless networks supporting one or more reliable communication protocols (RCPs), such as IEEE 802.11 and/or TCP. The key findings from the numerical results include 1) when we use IEEE 802.11 as an RCP with IP, in payload size ld = 1500 bytes (i.e., the standard MTU size for LANs), the effect of RPSP is not negligible for high mean bit-error rates, since lpmax / lp is relatively large where lp and lpmax represent the mean and maximum generated packet sizes, respectively, 2) in the case of TCP with HTTP, for ld = 1460 bytes (a common MSS value used for TCP), the effect of RPSP is less strong, because lpmax / lp is smaller than in IEEE 802.11, and 3) a large mean burst bit-error length weakens the effect of RPSP.