摘要
在VoIP(Voice over Internet Protocol)通信中H.323协议消息携带的地址信息在穿越NAT(Network Address Translation)时,传统的ALG(Apply Layer Gateway)方案采用的全部解码方法,性能较低。为了解决此问题,本文分析ALG技术,采用按需解码的方法,只解码消息的地址信息部分,不需全部重新编码,并做对比实验。结果表明,按需解码所需时间约是全部解码方案所需时间的1/75～1/80,优化了ALG的处理性能。
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.
出处
《计算机与现代化》
2011年第3期95-97,共3页
Computer and Modernization
