Three Latency Measuring and Analysis in 3G WIFI Router

• 1、School of Information and Communication Engineering, Beijing University of Posts and Telecommunications, Beijing 100876

Abstract：In this paper, we will introduce a new wireless network scenario, which connects Wi-Fi network and the 3G network together to relay packets from the terminal to the Internet. The new network scenario can compensate some shortcomings of the traditional wireless network, for example it can extend the transmission distance and serve more users. Measuring latency for the new network scenario can play a significant role in resource management, congestion control, network performance monitoring and Mobile Router optimization. When it comes to latency measurement, existing solutions normally require the time synchronization using Network Time Protocol(NTP), which will introduce inaccuracy and much more costs. In this paper we will propose a new latency measurement approach to measure latency for the new network scenario. The experiment results show that our approach is feasible and better performed, we will also analyse the performance of the network.

Keywords： latency measurement Network Time Protocol 3G WIFI Router