Compressed error and erasure correcting codes via rank-metric codes in random network coding

  • Authors:
  • Siguang Chen;Meng Wu;Weifeng Lu

  • Affiliations:
  • College of Computer Science, Nanjing University of Posts and Telecommunications, Nanjing, China;College of Telecommunications & Information Engineering, Nanjing University of Posts and Telecommunications, Nanjing, China and Key Lab of ‘‘Broadband Wireless Communication and Sens ...;College of Telecommunications & Information Engineering, Nanjing University of Posts and Telecommunications, Nanjing, China

  • Venue:
  • International Journal of Communication Systems
  • Year:
  • 2012

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Abstract

The error control of random network coding has recently received a lot of attention because its solution can increase robustness and reliability of data transmission. To achieve this, additional overhead is needed for error correction. In this paper, we design a compressed error and erasure correcting scheme to decrease the additional overhead of error correction. This scheme reduces the computation overhead dramatically by employing an efficient algorithm to detect and delete linearly dependent received packets in the destination node. It also simplifies the hardware operations when the scheme reduces the received matrix Y to form Ek(Y) instead of E(Y) in the decoding process. If at most r original packets get combined in k packets of one batch, the payload of one packet can increase from M − k to M − O(rlog qk) for the application of compressed code, where M is the packet length. In particular, the decoding complexity of compressed code is O(rm) operations in an extension field , which does not enhance the overall decoding complexity of the system. Finally, we also compare our scheme's performance with existing works. The numerical results and analyses illustrate the security and performance of our scheme. Copyright © 2011 John Wiley & Sons, Ltd.