A new approach for vertical handover between LTE and WLAN based on fuzzy logic and graph theory

Abstract

Today, two major wireless technologies exist, LTE and WLAN. Greatest challenge is to decide which one to use when both are available. Process of moving a device from LTE to WLAN network is called vertical handover. Many factors could impact the handover decision, and a lot of algorithms exist with their advantages and disadvantages. Here, a new algorithm is proposed which is based on fuzzy logic and a new combination of input factors. Also, a large number of vertical handover could produce ping-pong effect and reduce user performance. According to this, a new solution for reducing ping-pong effect is proposed. A solution is based on graph theory and finding bridges in a graph.