Case study: Partial ASN.1/BER decoding scheme in a multiprocessor environment

  • Authors:
  • Sunwan Choi;Kilnam Chon

  • Affiliations:
  • Protocol Engineering Center, Electronics and Telecommunications Research Institute, 161 Kajong-Dong, Yusong-Gu, Taejon, 305-350, Korea;Department of Computer Science, Korea Advanced Institute of Science and Technology, 373-1 Kusong-Dong, Yusong-Gu, Taejon, 305-751, Korea

  • Venue:
  • Computer Communications
  • Year:
  • 1996

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Abstract

In many cases, the most time-consuming part of the Open Systems Interconnection (OSI) protocol stack is the encoding and decoding of transfer syntax done in the presentation layer. The conventional ASN.1/BER decoding scheme runs on a whole Presentation Protocol Data Unit (PPDU). To overcome this problem, we present a new ASN.1/BER decoding scheme called Partial Decoding. The Partial Decoding scheme allows us to start decoding partially on each segment of a PPDU before a whole PPDU has been received. The measures show that the new scheme has a performance improvement as high as 40% over the conventional decoding scheme at large message size. Parallel processing for the network layer through the presentation layer is also used for a high performance protocol implementation on the basis of the proposed scheme.