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IEICE Transactions on Communications 2005 E88-B(2):766-769; doi:10.1093/ietcom/E88-B.2.766
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Copyright © 2005 The Institute of Electronics, Information and Communication Engineers

Letter

An Adaptive Routing Method for VoIP Gateways Based on Packet Delay Information

Minho JO1, HyoungDo KIM2 and Hyogon KIM3

1 The author is with the Department of Computer Science & Internet, Sejong Cyber University, Seoul, 143-150, Rep. of Korea., 2 The author is with the Department of Management Information Systems, Hanyang Cyber University, HIT Building, 17, Haengdang-Dong, Seongdong-Gu, Seoul, 133-791, Rep. of Korea. E-mail: hdkim{at}hycu.ac.kr, 3 The author is with the Department of Computer Science, Korea University, Seoul, 136-704, Rep. of Korea.

In order to improve the quality of VoIP services, an adaptive routing method is proposed in the application layer of Internet gateways. This method determines routing paths based on the average one-way delays in a predetermined re-routing interval. In order to evaluate the performance of the method, five different routing policies are specifically designed and tested. Experimental results show that the method can improve the QoS of Internet phone services.

Key Words: gateway-level routing, packet delay, VoIP

Manuscript received August 20, 2004.


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