Improvement of Handover Break Time Performance for Wireless Broadband Access System

Abstract 1 – Handover break time is a critical performance measure to warrant the seamless mobility, especially for the real-time service, e.g., Voice over IP (VoIP) service, in the wireless broadband access system. It refers to the time duration for which a PSS is no longer communicating with the serving BS or target BS until initial network entry is completed with the target BS during a handover process. Since a MAC-layer handover procedure is mainly controlled by exchanging a sequence of MAC management messages as a physical burst, we investigate how the handover break time is affected by a block error rate (BLER) of the link level. Furthermore, we consider some variations of the current handover procedure so as to explore the possibilities for improvement of the handover break time