关键词: 分层移动IP, 随机游动, 信令传输成本, 包转发成本

Abstract:

Three hierarchical mobile IP （Internet protocol） schemes to improve the handoff performance of mobile IP, i.e. hierarchical mobile IP, distributed and dynamic hierarchical mobile IP and chained foreign agent hierarchical mobile IP were introduced. An analysis model based on onedimensional random walk model was also proposed to derive the signaling transmission cost, the packet delivery cost and the total handoff cost of the three schemes. The performances of the three schemes were compared in detail based on the model, and the effects of different home handoff thresholds on the costs were discussed. Numerical results show that the chained foreign agent hierarchical mobile IP scheme outperforms the other two under small home handoff threshold.

Key words: hierarchical mobile Internet protocol, random walk, signaling transmission cost, packet delivery cost