Abstract
In Mobile IPv6, the handover process reveals numerous problems manifested by movement detection, non-optimized time sequencing of handover procedures, latency in configuring a new care of address and binding update to a home agent (HA). These problems may cause packet loss as well as packet disruption. To mitigate such effects, Fast handover for Mobile IPv6 (FMIPv6) has been developed. FMIPv6 can reduce a packet loss using tunnel based handover mechanism which relies on L2 triggers such as transmitting a packet from a previous access router (PAR) to a new access router (NAR). However, this mechanism may result in decreasing the performance of TCP due to the out-of-sequence packets between tunneling packet from the Home Agent, PAR and directly transmitted packet from the correspondent node (CN). In this paper, we propose a new scheme called EF-MIPv6 to prevent packet reordering problem using new snoop mechanism (NS). This new scheme can prevent a sequence reordering of data packet using proposed "MSAD" controlling. Simulation results demonstrate that managing the packet sequence in our proposed scheme greatly increases the overall TCP performance in Mobile IPv6 network.
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