Distributed system Raptor code transmission method specific to deep space communication

A distributed system and deep space communication technology, applied in the field of Raptor code transmission in distributed systems, can solve the problems of uncorrectable bit errors and low efficiency of confirmation and retransmission methods

Active Publication Date: 2016-08-10
HARBIN INST OF TECH SHENZHEN GRADUATE SCHOOL
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Problems solved by technology

The "Curiosity" Mars Exploration Rover that landed in October 2012 returned most of the video and image data to the earth through the "Odyssey" and "Mars Reconnaissance Orbiter", and the relay communication rate reached more than 40 times that of the direct link ; However, even with multi-hop network transmission, the single-hop link distance of interstellar communicati

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  • Distributed system Raptor code transmission method specific to deep space communication
  • Distributed system Raptor code transmission method specific to deep space communication
  • Distributed system Raptor code transmission method specific to deep space communication

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Embodiment Construction

[0034] Below in conjunction with accompanying drawing, preferred embodiment of the present invention is described in further detail:

[0035] This example provides a distributed system Raptor code transmission method for deep space communication, including the following steps:

[0036] Step S1, the code length is K respectively 1 and K 2 The original information of the source end is encoded by the system Raptor and sent to the same relay;

[0037] Step S2, the relay R stores the encoding symbols from the source end in the buffer area E respectively 1 and cache area E2, and then use the DSRC algorithm to process the data and send it to the destination;

[0038] In step S3, the destination D decodes the received encoded symbols.

[0039] This example is aimed at the communication scenario where the surface probe of the measured star jointly uses the orbiter to relay back the scientific data in the future, such as figure 1 As shown, design a Y-shaped topology with two source...

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Abstract

The invention provides a distributed system Raptor code transmission method specific to deep space communication, comprising the steps of: S1, separately performing system Raptor coding on source end raw information having a code length of K1 and K2, and sending coding to a same relay; S2, a relay R respectively storing coded identifications from source ends in a cache region E1 and a cache region E2, employing a DSRC algorithm to process data, and then sending the processed coded identifications to a destination end; and S3, a destination end D decoding the received coded identifications. The invention designs a distributed system Raptor code transmission method specific to the occasion where a plurality of detectors transmit towards the ground through orbiters, provides a joint decoding simplified scheme, theoretically analyzes and derivates a DSRC scheme, improves performance parameters of the scheme, performs simulation comparison with the distributed no-rate erasure correcting scheme of the prior art, and obtains a 99% decoding success rate when redundancy reaches 5%.

Description

technical field [0001] The invention relates to a code transmission method oriented to deep space communication, in particular to a distributed system Raptor code transmission method oriented to deep space communication. Background technique [0002] With the diversification of deep space exploration tasks and the continuous extension of the detection range, the amount of data and business types that need to be transmitted is increasing day by day, especially in the face of the needs of multimedia data services such as images, videos, and voices for deep space exploration in the future. The point-to-point support measures based on physical quantity gains are unsustainable, and the use of relay, collaboration, and even networked transmission is an inevitable trend in the development of deep space communications in the future; the "Space Interconnection Strategy Group" established by various aerospace organizations in the world including China (SISG), established the Delay / Dis...

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Application Information

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IPC IPC(8): H04L1/00H04B7/185
CPCH04B7/1851H04L1/0076
Inventor 焦健聂胜贤杨轶顾术实吴绍华张钦宇
Owner HARBIN INST OF TECH SHENZHEN GRADUATE SCHOOL
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