Congestion-aware WiFi offload algorithm for 5G heterogeneous wireless networks

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