Improvements to seamless vertical handover between mobile WiMAX and 3GPP UTRAN through the evolved packet core. - William J. Song; Jong-Moon Chung; Daeyoung Lee; Chaegwon Lim; Sungho Choi; Taesun Yeoum (IEEE Commun. Mag., 2009)

Enhancements to FPMIPv6 for improved seamless vertical handover between LTE and heterogeneous access networks. - Jong-Moon Chung; Daeyoung Lee; William J. Song; Sungho Choi; Chaegwon Lim; Taesun Yeoum (IEEE Wirel. Commun., 2013)