A method and apparatus for handover data integrity of a mobile station in a wireless data network with a plurality of wireless network service areas. The method and apparatus includes initiating handover by a mobile station, identifying a target access service network (ASN) for handover from a serving ASN. When the target ASN is identified, receive a data integrity capability from the target ASN, and determine whether a direct data delivery mode is available as a data integrity mode. When a direct data delivery mode is available, direct data delivery is performed with the data associated with the service flow from the serving ASN to the target ASN.