Handover priority based on adaptive channel reservation in wireless networks

The process, handover was introduced to facilitate users' mobility and quality of service to the users in wireless networks. Forced termination of a continuing call, which is undesirable to the users, is the result of handover failure. So, it is a requirement to keep the handover request in the higher priority than the new originating call. Several schemes were introduced to give priority to the handover calls which include fixed guard channel reservation scheme, handover queuing scheme, channel transferred scheme, etc. where simultaneous minimization of handover call dropping probability and new call blocking probability did not come out with successful results. Again, a non-priority scheme results in higher handover call dropping probability with the highest channel utilization. In our proposed idea, at first we study about the different schemes for handover call priority, analyze their performances in wireless networks and discuss their merits and demerits. Then, we propose our scheme to overcome the problems arose in the previous schemes. In our proposed scheme, we combine both the features of minimizing handover call dropping probability and new call blocking probability. This results in improved channel utilization keeping the handover call dropping probability within an acceptable range based on variable guard channels which has been made adaptive on the basis of channel occupancy.