HANDOVER VOLTE CALL TO UMTS PS-BASED VOICE CALL

摘要

Aspects of the methods and apparatus relate to transferring a received Voice-over-Long Term Evolution (VoLTE) call to a High Speed Packet Access (HSPA) packet-switched (PS) based voice call. One aspect of the methods and apparatus include receiving a VoLTE call from a network and identifying uplink VoLTE handover characteristics of the VoLTE call for an uplink transmission to the network and a downlink VoLTE handover characteristics for a downlink transmission from the network. The aspect includes configuring uplink HSPA PS based handover characteristics that emulate the uplink VoLTE handover characteristics for the uplink transmission and configuring downlink HSPA PS based handover characteristics that emulate the downlink VoLTE handover characteristics for the downlink transmission. The aspect includes utilizing the uplink HSPA PS based handover characteristics during the uplink transmission to the network and utilizing the downlink HSPA PS based handover characteristics during the downlink transmission from the network.