Patent ID: 8432816
Filing Date: 2013-04-30
Classification: H04L

Abstract:
1. A Voice over Internet Protocol (VoIP) terminal, comprising: a first detector to detect a packet loss value and a jitter value from a Real-Time Transport Control Protocol (RTCP) packet received from a terminal in communication the VoIP terminal over a network; a second detector to calculate a Round-Trip delay Time (RTT) value from a Real-Time Transport Protocol (RTP) packet and RTCP packet which are received from the terminal, and to add the jitter value detected by the first detector to the RTT value to obtain a time-axis index value; a controller to determine a QoS state value from the packet loss value and the time-axis index value to compare the determined QoS state value to a QoS state value of a QoS state table, and to display a QoS state; wherein the QoS state table comprises at least one of a network delay time value, the packet loss value, and the QoS state value of the QoS state table; and wherein the QoS state value of the QoS state table is obtained from an intersection between the network delay time value on an x-axis and the packet loss value on a y-axis.