关键词: LTE, WLAN, 垂直切换

Abstract:

In order to improve the quality of service in heterogeneous networks and reduce the pingpong effect caused by handover,this paper presents a new algorithm for vertical handoff in LTE and WLAN networks.The algorithm takes into account the fading impact on the received signal strength,selects the target network based on RSS,and then selects the best network according to the user's mobile speed and the cost function.In the cost function,the analytic hierarchy process is used to determine the weight of the delay and the parameters of the price and the user's preference.The simulation results show that the vertical handoff algorithm proposed in this paper can effectively reduce the “pingpong effect” and improve the service quality of the communication network.

Key words: LTE;WLAN;vertical handoff