Adaptive local route optimization in hierarchical mobile IPv6 networks

Although hierarchical mobile IPv6 (HMIPv6) can reduce the signaling overhead and the handoff latency, it results in the non-optimal local routing problem when two mobile nodes communicate in the same mobility anchor point domain. To address this problem, we propose an adaptive local route optimization (ALRO) scheme. The ALRO scheme chooses either the global route optimization scheme or the local route optimization scheme depending on the session-to-mobility ratio (SMR). Based on the proposed analytical model, we find the optimal SMR threshold at which the ALRO scheme shows the best performance. Numerical results demonstrate that the ALRO scheme shows a good performance in terms of the total cost, session delivery time, and session disruption time.