Research On Efficient Mobility Management Mechanism In Ultra Dense Network

The capacity of mobile communication networks has been in a explosive growth trend from the development of the first generation of analog cellular systems to today's fourth generation communications systems.There is a need to enhance the existing mobile broadband network to meet the data needs of future network services.There are two main ways to improve the system capacity,one is to split the macro cell,the other is the deployment of small coverage,low-power small area,and the traditional communications equipment manufacturers and operators are more inclined to adopt the second method.In the process of research 5G,it will further realize the densification of the cell,thus forming UDN,so the development of UDN in the future mobile communication system occupies an unshakable position.This paper focuses on small area-intensive deployment of UDN,and studies the emerging small cell enhancement technology.Firstly,the user plane architecture and control plane architecture of DC technology are studied by continuously advancing the standardization of 3GPP LTE-A,and the separation of user plane and control plane is realized.This paper studies the mobility flow scheme and basic switching enhancement scheme of SeNB addition,modification and release in DC communication process in detail.We combine UDN with DC to build a dual connectivity simulation platform based on ultra-dense network.There analyzes the problem of increasing the switching failure rate caused by UDN intensive,and then from the perspective of mobility and throughput to verify the effectiveness of DC technology in the UDN.The advantages and disadvantages of DC technology in UDN application are analyzed,so as to provide reliable experimental conclusions for the research of UDN mobility management.