Efficient Congestion Control and Vertical Handoff Technique for 3GPP LTE Advanced Network

Since from last decade, there is tremendous growth in cellular wireless networks like heterogeneous cellular networks. The heterogeneous networks such as LTE-A in which WiFi, WiMAX networks are communicated frequently. Radio Access Technologies (RATs) through which number of mobile devices having interfaces, similarly mobile devices having number interfaces with different RATs. These RATs are differing in performance, costs and capabilities. The mobile nodes need to be having always best connected depending on availability and requirements. The handover is performed in heterogeneous networks whenever mobile device leaves the present cellular network and joining another network. Such handover operations are utilized to achieve the seamless mobility. The MIH (802.21 standard) is recently introduced standard to perform efficient handover operations in heterogeneous networks. Apart from efficient handover operations for such networks, congestion is another research challenge which is rarely addressed. In this paper, novel MIH method is presented to solve the problem of congestion control and handover efficiency. Main goal is to present efficient approach for congestion detection, congestion prevention and congestion notification. Vertical handover is secondary objective, as congestion control method is concatenate with process of vertical handover during performing the handover decision and selecting the target network using protocol MIH.