Patent ID: 8085732

Claim:
A wireless communication terminal for roaming from a current access point (AP) to a destination AP within a plurality of APs, comprising: a detection module configured for detecting a current service quality parameter of each of the plurality of APs, a roaming frequency and a packet retransmission rate of the wireless communication terminal in a predetermined detection period; a roaming policy regulating module configured for calculating a value of a radio quality index (RQI) according to the current service quality parameter of each of the plurality of APs, the roaming frequency and the packet retransmission rate of the wireless communication terminal, and regulating a roaming threshold of the current AP according to the value of the RQI; and a roaming determining module configured for determining the destination AP that has satisfied a roaming condition corresponding to the value of the RQI; wherein the current service quality parameter of each of the plurality of APs includes a quality of service basic service set (QBSS) and a receive signal strength indication (RSSI) variance of each of the plurality of APs, wherein the QBSS of each of the plurality of APs represents a current channel utilization rate and a current loading of each of the plurality of APs, and wherein the RSSI variance of each of the plurality of APs is a RSSI variance of each of the plurality of APs in the predetermined detection period, and represents a stability of each of the plurality of APs; wherein the roaming frequency of the wireless communication terminal is a roaming amount of the wireless communication terminal in a system operation period detected by the detection module in the predetermined detection period, and indicates a communication stability between the wireless communication terminal and each of the plurality of APs, and wherein the communication stability between the wireless communication terminal and each of the plurality of APs decreases when the roaming frequency increases; and wherein the packet retransmission rate of the wireless communication terminal is a packet retransmission amount in an audio operation period, and wherein the packet retransmission rate of the wireless communication terminal indicates a communication stability between the wireless communication terminal and the current AP, wherein the communication stability between the wireless communication terminal and the current AP decreases when the packet retransmission rate increases.