SINGLE RADIO TUNE-AWAY FOR LTE VOICE WITHOUT CSFB

摘要

A method, an apparatus, and a computer program product for wireless communication are provided. In one aspect, an apparatus supports multiple radio access technologies (RATs), and has a single radio configured to provide a circuit-switched (CS) and packet switched (PS) connectivity. The apparatus sends a request for combined registration to a first network entity and detects whether circuit-switched fallback (CSFB) support is available to the apparatus in the first network. The request for combined registration may include a request for concurrent registration with a packet switched (PS) service of the first network and a CS service of a second network using a second RAT. The apparatus enables a single radio LTE (SR-LTE) operation, to maintain the availability of PS service in the first network, when the requested combined registration is not accepted by the first network entity. The SR-LTE operation and related techniques provided herein enable CS and PS service for voice- centric devices without regard to network support for CSFB operation.