Patent ID: 8451799
Filing Date: 2013-05-28
Classification: H04L,H04W

Abstract:
1. A zone switching method, comprising: performing, by a mixed-mode mobile station, a handover from a legacy frame structure of a legacy base station to a 802.16e zone of a mixed-mode frame structure of the mixed-mode base station, wherein the legacy base station supports an 802.16e standard and the mixed-mode base station supports both 802.16e and 802.16m standards; causing, by the mixed-mode mobile station, an anchor authenticator to be relocated from a legacy access service network gateway to a mixed-mode access service network gateway, wherein the legacy access service network gateway supports the 802.16e standard and the mixed-mode access service network gateway supports both 802.16e and 802.16m standards; performing, by the mixed-mode mobile station, a security update, resulting in a mixed-mode security context for operating in an 802.16m zone of the mixed-mode frame structure of the mixed-mode base station, the security update further comprising: switching, by the mixed-mode mobile station, from the 802.16e zone of the mixed-mode frame structure to the 802.16m zone of the mixed-mode frame structure; wherein data communication using the 802.16e zone is not disrupted during the above operations.