A Priority Paradigm for Deep Space Data Communication

Communicating data in deep-space, across interplanetary distances, entails constraints such as signal propagation delays in the order of minutes and hours, high channel error characteristics, meager and asymmetric bandwidth availability, and disruptions due to planetary orbital dynamics and antenna scheduling constraints on Earth. The licklider transmission protocol (LTP) is being designed as a reliable data transmission protocol optimized for this environment. We present a dynamic priority paradigm for LTP jobs that may help improve the volume and value of data communicated in deep-space by quantifying each job's Intrinsic Value and Immediacy. We study convolutional codes, Reed-Solomon codes, Raptor codes, and some of their combinations, over various channel error rates. We show how the appropriate application of these mechanisms to each job, based on its Immediacy and Intrinsic value, can improve the aggregate value of data transferred over the channel across various job mixes.

[1]  V. Jacobson,et al.  Congestion avoidance and control , 1988, CCRV.

[2]  Frank Drews,et al.  Obtaining the Greatest Scientific Benefit from Observational Platforms by Consideration of the Relative Benefit of Observations , 2003 .

[3]  Robert G. Gallager,et al.  Low-density parity-check codes , 1962, IRE Trans. Inf. Theory.

[4]  Mark Allman,et al.  New techniques for making transport protocols robust to corruption-based loss , 2004, CCRV.

[5]  John S. Heidemann,et al.  Ongoing TCP Research Related to Satellites , 2000, RFC.

[6]  Stephen Farrell,et al.  Licklider Transmission Protocol - Motivation , 2008, RFC.

[7]  K. K. Ramakrishnan,et al.  LT-TCP: End-to-End Framework to Improve TCP Performance over Networks with Lossy Channels , 2005, IWQoS.

[8]  Larry Peterson,et al.  TCP Vegas: new techniques for congestion detection and avoidance , 1994, SIGCOMM 1994.

[9]  Y. Feria,et al.  Solar Scintillation Effects on Telecommunication Links at Ka-Band and X-Band , 1997 .

[10]  Keith E. Wilson,et al.  Comparative Study of Optical and Radio-Frequency Communication Systems for a Deep-Space Mission , 1997 .

[11]  Stephen Farrell,et al.  Licklider Transmission Protocol - Specification , 2008, RFC.

[12]  R. Casta,et al.  Validating Rover Image Prioritizations , 2005 .

[13]  Jay L. Gao,et al.  CFDP Performance over Weather-Dependent Ka-band Channel , 2006 .

[14]  Thomas Stockhammer,et al.  Raptor Forward Error Correction Scheme for Object Delivery , 2007, RFC.

[15]  J. Bibb Cain,et al.  Error-Correction Coding for Digital Communications , 1981 .