HANDOVER METHOD IN IP-BASED WIRELESS NETWORKS

摘要

A handover method in an IP-based radio network is provided to enable a terminal to receive an IP in an IP management area, and keep an IP address regardless of the movement of the terminal when there is a session performed by the terminal, thereby performing the handover of the terminal without changing the IP address of the terminal to prevent a delayed time and a data loss. A PSS(Portable Subscriber Station)(101) reports a radio access status to a RAS(Radio Access System)(102)(S401). The PSS requests a new RAS(105) to perform the handover of the terminal(S402). The new RAS determines whether to receive the terminal and transmits a handover response to a previous RAS(S403). The previous RAS sets a data path to the new RAS during handover and prevent a loss of data during the handover(S404). The previous RAS directs the PSS to perform handover(S405). The PSS performs a radio access connection with the new RAS(S406). The new RAS completes the radio access connection with the PSS(S407). The new RAS sets a radio data path to the PSS(S408). The new RAS notifies a radio access gateway(103) that the PSS is registered in itself(S409). The radio access gateway processes a registration request, releases the data path of the PSS through the previous RA, and sets the data path of the PSS through the new RAS(311,S411). Accordingly, an IP(Internet Protocol) bearer path to the PSS is completed.