JIANG Xiaotian, LI Hongyan. An Improved File Delivery Protocol in SpaceNetworks[J]. Chinese Journal of Electronics, 2010, 19(1): 119-123.
Citation: JIANG Xiaotian, LI Hongyan. An Improved File Delivery Protocol in SpaceNetworks[J]. Chinese Journal of Electronics, 2010, 19(1): 119-123.

An Improved File Delivery Protocol in SpaceNetworks

  • Received Date: 1900-01-01
  • Rev Recd Date: 1900-01-01
  • Publish Date: 2010-01-05
  • | The Consultative committee for space data
    systems (CCSDS) File delivery protocol (CFDP) is a pro-
    tocol speci¯cally designed to meet the comprehensive re-
    quirements of space networks. However, CFDP's retrans-
    mission mechanics in deferred mode reduce its link utiliza-
    tion in space networks where long propagation delay and
    high bit error rate exists. In this paper, we proposed an
    improved ¯le delivery protocol called Relayed ¯le delivery
    protocol (RFDP). RFDP adopts a relay transmission me-
    chanics which raises the link utilization and reduces the
    total ¯le delivery time. In the next place, we analyzed and
    deduced the performance expressions of both protocols.
    Finally, we made simulations to both CFDP and RFDP.
    The results show that RFDP have performance superior-
    ity over CFDP in space networks.
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      沈阳化工大学材料科学与工程学院 沈阳 110142

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