垂直切换是异构无线网络相互融合的基础。
Vertical handoff is the basic requirement for the integration of heterogeneous wireless networks.
下一代移动通信系统的特征之一是异构网络的融合。
Heterogeneous network is one of the characteristics of next-generation mobile communication systems.
移动性管理技术是实现异构网络融合的关键技术之一，而切换管理对移动性管理显得尤为重要。
Mobility management is one of the key technologies for convergence of heterogeneous networks, and handover management is especially critical to mobility management.
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