First, the key technologies of 5G heterogeneous wireless networks are introduced. Based on the 5G heterogeneous network fusion architecture, heterogeneous network technologies are used to achieve the integration between different access networks, so that they can cooperate with each other, coordinate interference, and improve spectrum resources. Utilization and transmission efficiency; At the same time, an enhanced ADNSF congestion-aware WiFi(WIreless FIdelity) offloading system suitable for 5G networks is proposed. The congestion-aware WiFi offloading system can obtain network status information in real time. Analyzed the shortcomings of 3GPP’s existing congestion-aware WiFi offload strategy, combined with the user-centric network characteristics of 5G, proposed a congestion-aware WiFi offload algorithm, and modeled the access strategy as the effective capacity In the non-cooperative game model, a distributed algorithm and a dynamic value algorithm are designed respectively to maximize network utility. Simulation shows that the proposed distributed algorithm doubles the total effective capacity of the network compared to the device full activation scheme; compared with the distributed algorithm, the proposed dynamic value algorithm improves the total effective capacity of the network. This algorithm can effectively improve user satisfaction and achieve fine management of congested WiFi offloads

首先，介绍了5G异构无线网络的关键技术。异构网络技术基于5G异构网络融合架构，用于实现不同接入网之间的融合，从而可以相互协作，协调干扰，改善频谱资源。利用和传输效率；同时，提出了一种适用于5G网络的增强型ADNSF拥塞感知WiFi（无线保真）卸载系统。具有拥塞意识的WiFi卸载系统可以实时获取网络状态信息。分析了3GPP现有的拥塞感知WiFi卸载策略的缺点，结合5G以用户为中心的网络特征，提出了拥塞感知WiFi卸载算法，并将访问策略建模为有效容量在非合作博弈模型中，分别设计了分布式算法和动态值算法以最大化网络效用。仿真表明，与设备完全激活方案相比，该分布式算法使网络的总有效容量增加了一倍。与分布式算法相比，提出的动态价值算法提高了网络的总有效容量。该算法可以有效提高用户满意度，并实现对拥塞的WiFi流量的精细管理。仿真表明，与设备完全激活方案相比，该分布式算法使网络的总有效容量增加了一倍。与分布式算法相比，提出的动态价值算法提高了网络的总有效容量。该算法可以有效提高用户满意度，并实现对拥塞的WiFi流量的精细管理。仿真表明，与设备完全激活方案相比，该分布式算法使网络的总有效容量增加了一倍。与分布式算法相比，提出的动态价值算法提高了网络的总有效容量。该算法可以有效提高用户满意度，并实现对拥塞的WiFi流量的精细管理。