The scheme of vertical handover procedure with care-of-address function

We analyze the possibilities of using the cognitive radio standard IEEE 802.22. Temporarily unoccupied channels can be used for transferring information where 3GPP LTE service becomes impossible. The technology is very actual in sparsely populated areas. The current paper offers a complete vertical handover procedure from 3GPP LTE to the cognitive radio network IEEE 802.22 with the IP address preserved for easy user recognition. The procedure includes the authorization phase, registration, authentication and connection. The proposed procedure includes Care-of-Address Function for saving an IP address, which will be useful for mobile users. The main idea of proposed vertical handover procedure is saving of a temporary IP address. The vertical handover procedure based on entities from 3GPP LTE network and target IEEE 802.22 WRAN network. This procedure consist from 45 signaling messages (requests and responses) between mobile terminal, ANDSF function, Service Gateway and Packet Data Network Gateway, Base Station IEEE 802.22 and some other entities. Copyright © 2018 for the individual papers by the papers’ authors.