Performance Compensation for the False Alarm of L2 Trigger in FMIPv6

With the timely link-layer (L2) trigger invoking the handover protocols of upper layer, the specified handover procedures in FMIPv6 can be fully accomplished before terminating the current access link for enhancing the network performance. Firing the L2 trigger however is not always preferable owing to the irregular mobility profile acted by the mobile terminals. The premature L2 trigger named false alarm leads to the unnecessary handover with serious performance loss and resources waste. To address this issue, a performance compensation scheme for the false alarm (PC-FA) is proposed, where the IP prefix in the Router Acknowledgement (RA) messages received by the mobile node within a defined time frame after the L2 trigger are firstly analyzed to promptly determine the false alarm, and then a set of specific performance compensation measures are developed to accelerate the process of re-accessing into the previous served subnet. The simulations conducted on NS-2 platform indicate that PC-FA outperforms the compared schemes in the case that the L2 trigger does not correspond to an actual handover by promptly determining the false alarm, accelerating the re-accessing process and partially eliminating the performance loss.