Handover method in wireless portable internet system

摘要

Disclosed is a handover method in a wireless portable Internet system. When a mobile subscriber station is in a drop state, a ranging request message including an identifier of a previous base station and a string generated by encoding the ranging request message using an authentication key of the previous base station is sent to a target base station. The target base station requests the previous base station to execute handover of the mobile subscriber station using the identifier of the previous base station included in the ranging request message. The previous base station carries out message authentication using the encoded string received from the target base station, and when the authentication is successful, transmits information about the mobile subscriber station that is required for handover to the target base station. Accordingly, a ceaseless service session can be provided even in the drop state.

主权项

1. A method of performing a handover on a subscriber station in a target base station, the method comprising:
receiving a ranging request message including a base station identifier of a previous serving base station from the subscriber station when a drop situation is detected by the subscriber station; acquiring information of the subscriber station through the base station identifier of the previous serving base station; transmitting a response message on the ranging request message to the subscriber station; and performing network re-entry on the subscriber station.