Interference Coexistence Studies Of Lte Wireless System Under Introducing The Mobile WI-FI Devices

Wireless communication technology develops so rapidly, providing services from the basic voice and short message to current mobile broadband services like a variety of high-speed wireless Internet access, entertainment, computing and mobile information services. The increasing prominence of users, user-centric mobile communication systems are also gradually becoming apparent based on the technology development and integration.With increasingly diverse needs, users want to connect to the Internet getting rid of the restrictions of time and place. Diverse needs lead to various equipments such as mobile phones, tablet computers, notebook computers and personal digital assistants and smart cameras. More and more people have not only one electronic device. It will be a trend that users use multi-terminals access to the Internet at the same time. Sharing contents between friends is also becoming more and more popular. How to solve the multi-terminal devices access to the network at the same time regardless of time and place is of great research value and practical significance.Existing wireless fidelity technology (Wireless Fidelity, Wi-Fi) can support the802.11standard for wireless networking products including mobile phones, tablet PC, PDA and other terminals to connect. Actually it converts the wired network signal to wireless signal. However, Wi-Fi access points can not move freely so that the Wi-Fi signal coverage is fixed. As the Wi-Fi hotspots are not commonly deployed so far, mobile wireless Internet devices (Mobile Wi-Fi, later referred to Mi-Fi), turned out can provide an effective way to allow users to enjoy wireless access to Internet anytime and anywhere with a certain data rate and better experience.The introduction of new devices adds to the original topology but also lead to some change like increasing the possible link type, adding new access point and launch equipment, resulting in a more complex interference structure. The new device is both a source of interference and a interferer. It is possible to cause effect on the system throughput and capacity. So it’s necessary to carry a interference coexistence study of LTE wireless system under introducing the mobile Wi-Fi devices. This paper aims at above deployment and studies the influence on the whole system after introducing the new devices. First, it calculates the precise isolation between the new device and the original system using a deterministic analysis method. Then it simulates two kinds of scenario deployment including indoor and outdoor scenario through the Monte Carlo simulation method. Finally, this paper offers some coexistence recommendations including the isolation and radio frequency parameters.