Research of Service Flow Authentication Relocation

SFA management is an essential element in the WiMAX network architecture. However, there are some issues, which are the abruptions between the authenticator and the ASFA and between the anchor GW and the SSFA. The abruptions result from the mobility management in WiMAX network architecture and bring on that service flow service provided to mobile users canpsilat be accomplished. Network exit may take place because the incorrect communication from the abruptions. The issues are figured out by the ASFA relocation algorithm and the SSFA relocation algorithm presented in the paper. The algorithms proposed can implement the normal communication between the ASFA and the SSFA. And mobile users can obtain the anticipant service flow. Therefore, the network exit and the states mismatch can be avoided. The proposed scheme can be implemented through minimally modifying the existing Mobile-WiMAX specification. Furthermore, after the relocation of SSFA follows the change of the anchor point in the CSN mobility management, the ASFA is not conscious of the location movement of the SSFA. In this paper, the context transfer is applied for notifying the current location of the SSFA to the ASFA.