Patent ID: 8681756

Claim:
An anchor gateway for use in a WiMAX network, the WiMAX network comprising an authentication gateway, a serving gateway and a serving base station (BS), the serving BS being configured to proceed a first data path (DP) registration procedure with the anchor gateway via the serving gateway and transmit a DP registration signal, comprising an identification (ID) code of a mobile station (MS), of the MS corresponding to the first DP registration procedure, the anchor gateway comprising: a transceiver interface, being configured to receive the DP registration signal; and a microprocessor, being electrically connected to the transceiver interface and configured to: transmit an authentication key context request signal comprising the ID code of the MS to the authentication gateway via the transceiver interface according to the DP registration signal; and transmit a medium access control (MAC) context request signal comprising the ID code of the MS to the serving BS according to the DP registration signal; wherein the authentication gateway is configured to transmit authentication key context according to the ID code of the MS and the ID code of the candidate BS, the serving BS is configured to transmit an MAC context according to the ID code of the MS, and the transceiver interface is further configured to receive the authentication key context and the MAC context.