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        Congestion-Aware Handover in LTE Systems for Load Balancing in Transport Network

        Safdar Nawaz Khan Marwat,Sven Meyer,Thushara Weerawardane,Carmelita Goerg 한국전자통신연구원 2014 ETRI Journal Vol.36 No.5

        Long-Term Evolution employs a hard handoverprocedure. To reduce the interruption of data flow,downlink data is forwarded from the serving eNodeB(eNB) to the target eNB during handover. In cellularnetworks, unbalanced loads may lead to congestion inboth the radio network and the backhaul network,resulting in bad end-to-end performance as well ascausing unfairness among the users sharing the bottlenecklink. This work focuses on congestion in the transportnetwork. Handovers toward less loaded cells can helpredistribute the load of the bottleneck link; such amechanism is known as load balancing. The results showthat the introduction of such a handover mechanism intothe simulation environment positively influences thesystem performance. This is because terminals spendmore time in the cell; hence, a better reception is offered. The utilization of load balancing can be used to furtherimprove the performance of cellular systems that areexperiencing congestion on a bottleneck link due to anuneven load.

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