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Mobile IP is the proposed standard for IP mobility support. When a Mobile Node (MN) is far away from home, registration at its home agent can cause a long handoff delay that leads to significant packet drop and throughput reduction. In order to improve standard mobile IP, the mobility of MN has been divided into micro-mobility and macro-mobility. Some micro-mobility management protocols have been developed. We compare the performance between standard mobile IP (RFC2002,RFC3220,RFC3344) and micro-mobility management protocols and give some equations along with the analysis of calculating results.