Research and Realization of NAT Traversal Solutions in VoIP System Based on ALG

doi:10.3969/j.issn.1006-2475.2011.03.026

Computer and Modernization ›› 2011, Vol. 1 ›› Issue (3): 95-97.doi: 10.3969/j.issn.1006-2475.2011.03.026

• 网络与通信 • Previous Articles Next Articles

Research and Realization of NAT Traversal Solutions in VoIP System Based on ALG

ZHAO Hui¹, LOU Xin-yuan¹, YANG Qing-wei²

1. School of Information Science and Technology, Southwest Jiaotong University, Chengdu 610031, China;2. School of Computer Science and Engineering, University of Electronic Science and Technology of China, Chengdu 611731, China

Received:2010-10-28 Revised:1900-01-01 Online:2011-03-18 Published:2011-03-18

Abstract

Abstract: During the VoIP communication, the address information carried by H.323 protocol traveling the NAT, decoding-all method with lower performance is used in the traditional performance of ALG solution. To optimize performance, the paper analyzes the ALG technology and gives a decoding method using on-demand which only decodes the address information of the message instead of re-encoding all. A comparison experiment is carried out which shows that the time of decoding on-demand is about 1/75~1/80 of the decoding-all solution. The problem of low efficiency of ALG treatment is optimized.

Key words: ALG, on-demand decoding, NAT traversal, H.323

CLC Number:

TP393

ZHAO Hui;LOU Xin-yuan;YANG Qing-wei. Research and Realization of NAT Traversal Solutions in VoIP System Based on ALG[J]. Computer and Modernization, 2011, 1(3): 95-97.

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Research and Realization of NAT Traversal Solutions in VoIP System Based on ALG

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