Research On Base Station Self-planning And Application For LTE FDD-TDD

With the continuous development of wireless communication technology,the data traffic demand of users increases explosively.The single-standard LTE base station networking is controlled by capacity limitation and cannot meet the needs of users.The operator is adapting to the gradually increasing user throughput and reasonable.Plan spectrum resources and gradually promote LTE FDD-TDD hybrid networking in various regions.LTE hybrid networking is an inevitable trend in the development of communication networks.Research institutes at home and abroad actively carry out research and implementation of LTE hybrid networking related technologies.Nowadays,the competition in the mobile communication market is becoming more and more fierce.How to reduce the cost of LTE hybrid networking and improve the quality of communication networks are the key issues facing operators.An excellent wireless network planning solution can greatly improve the overall performance of the network and save operators money.The main contents of wireless network planning include requirements analysis,base station pre-planning,system simulation,survey confirmation,and engineering construction.Base station pre-planning is an important part of the network planning process,which directly determines the performance and investment income of network construction.It has always been network planning.The research hotspot of construction and the study of base station pre-planning problems have very good theoretical and practical significance.Thesis studies the base station site planning problem in the LTE hybrid networking process with the LTE system as the object.The goal of LTE hybrid network base station planning is to plan the target area based on the distribution characteristics of the coverage area,so that the wireless network can meet the requirements of coverage,capacity,cost and quality,and meet the current business needs.Adapt to the future development needs and expansion requirements of the network.Therefore,the pre-planning method of the base station is very important,especially in the project,a good planning method can bring the network advantage to the operator.The main contents of thesis are as follows:(1)On the basis of consulting a large number of domestic and foreign literatures,the background and development status of LTE mixed network base station planning were analyzed,and the planning model and optimization algorithm were summarized.Then,the LTE network system and the basic theory of base station planning were introduced.(2)For the determination of the base station site in the pre-planning of LTE hybrid network,two methods based on traditional pre-planning and based on mathematical model are proposed.And using one example to carry out site planning with two methods,two sets of site planning schemes are obtained.Through comparative analysis,it is found that the traditional pre-planning method often relies on engineers' experience in site estimation and site selection process,resulting in inaccurate planning results,but because of this,engineers can artificially develop the subsequent development and performance of the entire network according to engineering requirements.Intervention;based on the mathematical model of the hybrid network base station self-planning method,combined with multi-objective discrete particle swarm optimization,can obtain the optimal base station site planning scheme in terms of coverage,energy efficiency ratio,load ratio and cost,which can comprehensively improve Network performance,while reducing costs,but does not combine the specific case to limit the optimization objectives,the probability of selecting unreasonable sites is very large,so it is necessary to combine the conditional constraints and manual adjustments to make the coverage more realistic.(3)According to the network construction requirements of the LTE hybrid network project in Lhasa,the planning requirements are analyzed.Combined with the method described in chapter 3,the constraint conditions are obtained by using the traditional preplanning method,which is used for constraint self-planning calculation,and the site planning scheme is obtained.Finally,Atoll communication planning software is adopted to simulate the planning scheme and verify its rationality.