provides only the PS business. CSFB and single SIM dual-band are the two ways to voice solutions to be the current TD- LTE system. CSFB on terminal battery has a larger increase. It is discussed in this paper focus on TD-LTE system voice fall back pattern
attachments
procedure and called fl ow. CSFB typical issues
such as unopened CSFB features
down to 2G failed
hook doesn’t return such as the 4G
network problems after careful analysis of signaling