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: | 1-一月-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 |
顯示於類別: | 期刊論文 |