In order to enhance the spectrum efficiency in heterogeneous wireless networks, the idea of dynamic spectrum allocation (DSA) used in cognitive radio was introduced into the heterogeneous wireless networks, the idea of vertical handoff for multi-mode mobile users was introduced into the base station side, thereafter, the shared carrier vertical network transformation (SCVNT) algorithm in heterogeneous wireless networks was proposed. The theoretical analysis and simulation results show that SCVNT algorithm can effectively enhance the total channel efficiency in heterogeneous wireless networks, improve fairness in resource allocation, and will be able to achieve smooth upgrade, which is of a relatively high application value.%为了提高异构无线网络的频谱利用率,将认知无线电中合作动态频谱分配(DSA)的思想应用于以基站和用户为基本单元的异构无线网络,将多模终端用户垂直切换的思想引入基站侧,提出了异构无线网络中的共享载波垂直网络转换( SCVNT)算法.理论分析与仿真实验表明,SCVNT算法可有效提高异构无线网络的总体信道利用率,改善资源分配的公平性,并可实现平滑升级,具有较高的应用价值.
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