Analytic modeling for soft handoff in CDMA based wireless cellular network using guard channel assignment scheme

In Cellular networks, blocking occurs when a base station has no free channel to allocate to a mobile user. Handoff is the process of changing the channel associated with the current mobile user while a call is in progress. If free channel not available in moving cell, then progressive call is blocked. To reduce handoff blocking probability handoff prioritization Scheme using guard channels has been applied in CDMA network. The main goal of this research paper is to investigate the handover research issues and developing schemes which can handle handovers traffic in order to support on-going calls when mobile users are switching between base stations. Finite buffering queueing model has been developed with Poisson arrival process to analyze the soft handoff problem in CDMA system. Here the reneging behavior of queued handoff calls is also considered and different performance measures have been developed.