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.
研究异构无线网络的垂直切换及网络选择算法。
Study the vertical handoff and network selection algorithms for heterogeneous wireless networks.
异构无线网络的融合是当前无线网络的发展趋势。
Heterogeneous wireless networks convergence is a trend in present wireless networks development.
如何有效集成异构无线网络，优化使用全部的无线资源是B3G研究领域内关键课题之一。
How to efficiently integrate heterogeneous wireless networks and optimally use the whole wireless resource is one of crucial issues in the field of B3G research.
根据3gpp对无线网络业务类型的划分，提出了一种基于业务类型的异构无线网络选择算法。
This paper proposes an algorithm of heterogeneous wireless network selection based on service, according to the wireless network service types classified by the 3gpp.
并结合具有主动特性的异构无线网络资源管理，在蜂窝网试验平台上添加相关接口和相应的通信流程。
Thirdly, we add interfaces and communication procedures in the cellular platform corresponding to the radio resource management technologies with active characteristics.
异构无线网络的无线资源管理是当前研究的一个热点问题，但由于异构无线网络本身的复杂性，大范围的工程试验成本很高，因此，目前的研究多以理论仿真为主。
Radio resource management is a crucial issue in studying heterogeneous wireless networks. However, for the complexity of the problem, it will cost high to do large-scale project experiment.
为使异构分层无线网络能服务更多的移动用户，提出了一种基于逗留时间的动态流量均衡算法。
In order to serve much more mobile stations in heterogeneous hierarchical wireless networks, a dynamic load balancing algorithm based on sojourn time was proposed.
而无线网络本身带宽多变、终端异构、丢包率高等与生俱来的特点对网络结构和协议的设计提出了新的要求。
Because of the changing bandwidth, heterogeneous terminals and high packet loss rate, the wireless networks put forward new requirement for the design of network architectures and protocols.
为了适应不同通信条件下不同的需求，目前多媒体通信和无线网络普遍存在异构性。
For the different requirement of various multimedia communication conditions, the heterogeneity exists in multimedia communication and wireless network.
为了适应不同通信条件下不同的需求，目前多媒体通信和无线网络普遍存在异构性。
For the different requirement of various multimedia communication conditions, the heterogeneity exists in multimedia communication and wireless network.
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