WiMAX subscriber and mobile station authentication challenges

This article examines the subject of authentication within WiMAX (IEEE 802.16-2009) based wireless metropolitan networks. The two WiMAX authentication mechanisms (PKM versions 1 and 2) are discussed and a number of aspects affecting their authentication capabilities presented. Of particular n4056792ote is the handling of digital certificates and the lack of multiple certificate authority support. This lack essentially prevents the interoperability of WiMAX devices produced by different manufactures. Proposed recommendations are presented that should improve how WiMAX authentication operates and allow for mixed manufacturer device interoperability.