Research On High Load Cellular Network Optimization And Emergency Guarantee In LTE Network

With the further development of LTE network,the load of LTE network will be further increased and this state will be more and more common.As the regional load of the hotspot area is gradually increased,the uneven distribution of the users leads to the high load situation in some areas.The coverage of the hotspot area and the single carrier can not guarantee the demand of the current community to support the users.Using the optimization method to meet the user's business needs is an urgent need to solve the network operation.In this paper,the optimization method of LTE network under high load is studied,and the feasibility scheme is put forward.Several common LTE network optimization methods,including coverage adjustment,parameter optimization,load balancing and resource expansion,are introduced in this paper.The risk of network performance degradation can be reduced by increasing network capacity and enhancing LTE network resiliency.To ensure that the number of users under high load scenarios have a good business experience,we carry out the analysis of the network capacity,define the LTE high load cell,analyze the high load area in hot spots.This paper puts forward the idea of resource evaluation,parameter optimization and capacity optimization to provide a basis for high-load solution by three steps to the LTE network.After the expansion of the base station,the problem can be solved by opening the load balancing,the relevant parameter configuration,RF adjustment and other optimization means.The experimental results show that under the condition of making full use of wireless resources,users' access to the network is guaranteed and the load is controlled within a reasonable range,avoiding the overall network performance degradation caused by the high load.In the continuous coverage area,the great performance of the load sharing among the small area at the same time ensure that the resource allocation is reasonable and effectively improve the network resource utilization of the entire district.In this paper,we propose a network emergency solution to deal with large users and heavy traffic.According to the scenario of high load network,we study the strategies to deal with the impact of LTE network traffic in the four dimensions of "expansion,optimization,relocation,and limitation." In response to the growth of the entire network business,especially in the case of sudden service impact,measures such as capacity expansion,optimization,traffic relocation,and restricted access are taken to relieve network pressure and enhance user perception.According to the actual situation of the network,we put forward the expansion criteria: "PRB utilization> 80%" and "RRC connection user number> 60";and the related timers T302 that may affect the network performance under the heavy traffic conditions.The UE does not activate the timer parameters and gives the reference value;for the hot spot cell,it studies the precise control of the coverage area by adjusting the reselection / handover parameters,and provides the parameter setting specifications and reference values.The measures of traffic relocation in the system are formulated.The parameter values for load balancing based on the number of users are given.The actual effect is verified in the LTE network of Ma'anshan Unicom,and the load of hot spots network is successfully reduced,while the user experience does not decline at the same time.