Lead developer of Advanced communication platform team,

Research Area

• IMS/VoLTE/RCS client enhancement

• Multiple Device Service

• Embedded SIM and etc.

lead developer of Android Telephony team,

Research Area

• Radio Interface Layer (RIL) a.k.a. Telephony API (TAPI)

• Message (SMS, MMS)

• IMS

served as a 3GPP SA2 delegate

• LTE / SAE architecture

• Voice Continuity (CSI, SRVCC)

• IMS

developed bluetooth protocol stack software and designed bluetooth products

powered by embedded linux.

led several commercial projects including Bluetooth access points with cordless

telephony profile for Korea Telecom.