Xiangguang joined Nokia in Jan 2001 as R&D Engineer in Nokia Networks after he earned his M.Sc. (Electromagnetic and Microwave Engineering) from Beijing University of Post and Telecommunications. In Jan 2002, he joined Mobile Network Lab of Nokia Research Center (NRC) as Research Engineer where he devoted on cellular competences building up in the team and research on (E)GPRS and WCDMA RRM algorithms. Since March 2003, Xiangguang was appointed as Research Manager to lead a team on system performance and protocol research of WCDMA and CDMA2000, and the Research Manager to lead a team on Radio System Performance in RAD Lab since July 2004 till now. Xiangguang is author of several technial papers and holder of a few issued and/or pending patents.