Fault Tolerance Agents in Grid Environment

Abstract: To support multimedia services with different Quality of Services (QoS) and bandwidth requirements is current aim in the wireless networks. To enhance network performance is important in effective management of limited resources. Access Service Network Gateway (ASN GW) relocation is the process of changing the traffic‟s Anchor Point (AP) from one GW to another which is independent of Mobile Station‟s (MS‟s) Link Layer (LL) handover. The existing standardsdo not specify when the ASN GW relocation has to be performed, buthave details about the ASN relocation procedures. The proposed system combines gateway relocation and Admission Control to determine when to perform ASN GW relocation, as relocation is closely related to Admission Control. This novel Bandwidth based Admission Control (BAC) Scheme considers the size of requests from each MS rather than taking the number of MSs as a whole. Hence the mobility management, which refers the IEEE 802.16e, scheme minimizes the packet loss, new call blocking probability, maximizes the throughput, handover delay and handover probability.

Keywords: Gateway Relocation, Handover, Admission Control, Blocking Probability, Dropping Probability.