The Automatic Cell Outage Compensation Algorithm In LTE Networks

With the rapid development of communication technology, the requirements on the intelligence of communication network are also rising. The purpose of Self-organizing network (SON) technology is to achieve the self-management of communication network, in order to minimize human intervention during network maintenance process. Self-organizing networks including three functions, they are self-configuration, self-optimization and self-healing. Cell outage compensation is an important use case of self-healing function. An outage may be occurred in the mobile communication network due to hardware failure, configuration errors or any other reasons. In this paper, we focus on the achievement of cell outage compensation, and design two methods of cell outage compensation algorithms.Currently, the study of self-management is still at the requirements of concept and framework, lack of targeted research specific to a particular type of network self-management functionality. The study of a specific LTE cell outage compensation algorithm and mechanism of compensation has not yet reached a mature stage, need further study. The actual network environment is changing, and therefore, different adjustment parameters of the compensation scheme will bring a different result, the optimal adjustment parameters for different network environments and also varies with the scenario change.In response to these problems, the paper summarizes the system of self-organizing wireless access network related fields, and how to use the independent network management technology to achieve self-organizing network function of radio access network, the study focused on the LTE radio access network cell outage compensation algorithm, the main contents include two specific cell outage compensation algorithm and the implementation and simulation.During the design of downlink cell outage compensation algorithm and the implementation, reference signal received power chosen to be the adjustment parameters. According to the rate of overlap coverage and coverage optimization goal, the algorithm established a corresponding mathematical model for algorithm design. After the outage occurring in the cell is detected, according to the prevailing situation of network coverage to neighboring cells to adjust the reference signal power as a mathematical object model and particle swarm optimization algorithm to generate the specific change values. Simulation results show that this method can effectively restore performance impact caused by cell outage. During the design of uplink cell outage compensation algorithm and implementation, this paper selected target uplink received power as an adjustment parameter, analyzes the feasibility of adjustment under the condition of uplink coverage is limited. According to the two optimization objective, coverage and link quality, this paper built a mathematical model. Taking into account the immune algorithm has the advantage of global optimization, convergence speed, etc., this algorithm to be selected to implement the mathematical model. Taking into account the different scenarios compensation targets may differ, the algorithm sets the optimization goal weight, the proportion of the two goals can be adjusted according to different requirements for a wider scope. In the simulation analysis phase, this section use the coverage, speed and user SINR algorithm converges to analyze the simulation results, the results show that the algorithm can quickly converge coverage reached normal levels, decreased user SINR values are within the allowable range, confirmed that the algorithm is effective and feasible.