To call or to be called behind NATs is sensitive in solving the direct connection problem

Cheng Yuan Ho, Chien-Chao Tseng*, Fu Yu Wang, Jui Tang Wang, Ying-Dar Lin

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

5 Scopus citations

Abstract

In this article, we first depict the call-role sensitivity problem in Network Address Translation (NAT) traversal, and then propose an approach to resolving the problem. The problem is whether a direct connection can be found between two peers across NATs mainly depends on the NAT type at the caller's side. We propose the extra-candidate connectivity check where both peers initiate a direct connectivity check to eliminate the effect of the call role. We have implemented the extra-candidate connectivity check and conducted experiments with 18 different NATs. Experimental results show that our approach can indeed resolve the call-role sensitivity problem, and maximize the direct connectivity rate (DCR) which is improved by 18.71% from the original scheme.

Original languageEnglish
Article number5620995
Pages (from-to)94-96
Number of pages3
JournalIEEE Communications Letters
Volume15
Issue number1
DOIs
StatePublished - 1 Jan 2011

Keywords

  • NAT
  • NAT traversal
  • direct connection

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