LTE与Wi-Fi异系统垂直切换融合算法的设计与研究

DESIGN AND RESEARCH OF THE INTEGRATION ALGORITHM ON LTE AND WI-FI INTER-SYSTEM VERTICAL HANDOVER

为了解决LTE与Wi-Fi的异系统中,不同制式的网络进行垂直切换时,通常存在产生的切换响应不及时、信噪比降低、传输信号质量差的问题,切换设计引入了融合算法进行改进设计,并通过Matlab实验,验证改进切换设计的可行性,以及评估该切换设计的传输信号强度与传输信噪比特性。仿真结论表明,融合算法的设计使得LTE与Wi-Fi异系统能够成功进行垂直切换,加代价函数迟滞与时间迟滞减少了LTE与Wi-Fi异系统之间的乒乓切换,提高了系统的稳定性;信道质量比单独LTE、Wi-Fi系统、基于信号强度的水平切换算法系统得到了有效的改善。

In order to solve the problem that the handover of different standard networks in the system LTE and Wi-Fi,such as converging is not vertical,the handover response is not timely,the signal-to-noise ratio is reduced and the quality of the transmitted signal is poor;the handover designed introduces a fusion algorithm to improve.Through matlab experiments,verify the feasibility of improved handover design,and evaluate the transmission signal strength and signal-to-noise ratio characteristics of the handover design.The simulation results show that the design of the fusion algorithm enables LTE and Wi-Fi different systems to successfully perform vertical handover.The cost function hysteresis and time lag reduce the ping-pong switching between LTE and Wi-Fi different systems,which improves the stability of the system.The channel quality is effectively improved compared to the LTE,Wi-Fi system,and signal strength based horizontal handover algorithm system.