標題: NAT-Compatibility Testbed: An Environment to Automatically Verify Direct Connection Rate
作者: Ho, Cheng-Yuan
Wang, Fu-Yu
Tseng, Chien-Chao
Lin, Ying-Dar
資訊工程學系
瑞昱交大聯合研發中心
網路測試中心
Department of Computer Science
Pealtek NCTU Joint Res Ctr
Network Benchmarking Lab
關鍵字: NAT;NAT traversal;direct connection;testbed
公開日期: 1-Jan-2011
摘要: In this article, an NAT-compatibility testbed is designed to automatically conduct the repeated experiments, collect the test results, and verify the direct connection rate (DCR) of any NAT traversal programs. Achieving a high DCR is important because using relays may unnecessarily increase the bandwidth cost, processing load of the relay servers, and the end-to-end packet delay. The NAT-compatibility testbed is constructed with 4 components: two peers, an automatic execution mechanism, NAT devices, and signaling/intermediate servers such as STUN, TURN, and SIP. It is also called the fully meshed testbed because the test result of all NAT combinations is a square. It measures the DCR of ICE, KeyStone, and PJNATH as 53.7%, 59.87%, and 50.93%, respectively. Experimental results show that asymmetric and unexpected direct connectivity check results occur in the real Internet. In order to enhance NAT traversal capability, the findings, like "port prediction" and "call-role sensitivity problem," are also described in the experimental results.
URI: http://dx.doi.org/10.1109/LCOMM.2010.102810.101700
http://hdl.handle.net/11536/26129
ISSN: 1089-7798
DOI: 10.1109/LCOMM.2010.102810.101700
期刊: IEEE COMMUNICATIONS LETTERS
Volume: 15
Issue: 1
起始頁: 4
結束頁: 6
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