SYSTEM AND METHOD OF DYNAMIC SWITCHING OF ADVANCED CALLING FEATURE IN LTE NETWORKS

摘要

A user equipment comprises a transceiver circuitry that operates the user equipment in either of two modes, the two modes comprising: i) a first mode in which the transceiver circuitry performs packet data services in a packet switched network using a first radio access technology(RAT) and performs voice calls in the packet switched network using a Voice over IP (VoIP) service, and ii) a second mode in which the transceiver circuitry performs packet data services in the packet switched network and performs voice calls in a circuit switched network using a second RAT. The user equipment also comprises a controller that compares a link quality associated with a radio link to the packet switched network to at least one threshold value and, in response to the comparison, controls switching the user equipment between the first mode and the second mode. The controller switches the user equipment from the first mode to the second mode if the link quality falls below a first drop threshold value associated with an RSRP value or an SINR value. The controller switches the user equipment from the first mode to the second mode if the link quality falls below the first drop threshold value for more than a drop period of time threshold value.