Cost-efficient vertical handover between cellular networks and WLAN based on HMIPv6 and IEEE 802.21 MIH. - Jongdae Park; Hoyoung Ryu; Soon Seok Lee; Sueng Jae Bae; Ju Yong Lee; Mihui Kim; Min Young Chung (Int. J. Netw. Manag., 2013)