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Considerations for Isochronous Data Services over the Proximity-1 Space Link

Show simple item record Gao, Jay L. 2006-11-08T23:36:44Z 2006-11-08T23:36:44Z 2006-06-19
dc.identifier.citation AIAA 9th International Conference on Spacecraft Operations (SpaceOps), Rome, Italy, June 16-24, 2006 en
dc.identifier.clearanceno 06-1276
dc.description.abstract This paper will analyze the latency, jitter, and throughput performance of the Proximity-1 protocol for isochronous applications. In particular we will focus on constrained scenarios where the protocol operates in full-duplex mode, carrying isochronous traffic in one direction and error-controlled traffic in the other direction. We analyze the impact of the strict priority scheme in Proximity-1 on delay jitter and the impact of the isochronous traffic on the efficiency of the reliable data transfer in the other direction, and discuss methods for performance optimization. In general, jitter performance is driving by relative loading of isochronous traffic on the forward link compared to the acknowledgement traffic. Under light loading condition, the upper-bound of the delay jitter is the transmission duration of an acknowledgement frame on the forward link; for higher loading scenarios, the maximum jitter is scaled up by the inverse of the residual bandwidth, i.e., the spare capacity available in the forward link to carry isochronous traffic. The efficiency of reliable data transfer can be improved by using larger retransmission widow size or limiting the frame size of the forward link data frames. In general we find that when properly configured, Proximity-1 protocol, without modification, can provide isochronous service without sacrificing efficiency. en
dc.description.sponsorship NASA/JPL en
dc.format.extent 460951 bytes
dc.format.mimetype application/pdf
dc.language.iso en_US en
dc.publisher Pasadena, CA : Jet Propulsion Laboratory, National Aeronautics and Space Administration, 2006. en
dc.subject Proximity-1 en
dc.subject isochronous communications en
dc.subject real-time en
dc.subject Consultative Committee for Space Data System (CCSDS) en
dc.subject data communications
dc.title Considerations for Isochronous Data Services over the Proximity-1 Space Link en
dc.type Preprint en

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