Research On NB-IoT Network Performance Based On LTE Network

This paper is based on the rapid development of NB-IoT nowadays.But it has not yet begun to be officially used in China.Based on the principle of NB-IoT,the 3 deployment modes of NB-IoT are analyzed,and the characteristics of NB-IoT uplink and downlink are introduced.The network performance of NB-IoT services deployed on 800M LTE networks is tested in terms of interference,coverage,network speed,mobility management,delay and so on.This paper analyzes the test results and the problems that NB-IoT may appear in the formal commercial situation,and accumulates experience for large-scale deployment,which will play a certain reference role for the future development of NB-IoT network.The main work and achievements of this paper are as follows:1.This paper studies the possible adjacent frequency interference between NB-IoT and CDMA,and tests whether there is interference between the two scenes of common station and non common station.2.The coverage capacity of NB-IoT single station is tested,and two networking modes of 1:1 and 1:N are proposed.The coverage capacity of two networking modes is compared under the condition that N is 1.6.3.The limit rate of NB-IoT at near point,midpoint and far point is tested,and the possible rate of decrease is also verified in multi-user case.4.The mobility of NB-IoT is analyzed,and the mobility characteristics of NB-IoT are verified from the aspects of reselection and handover.5.Combined with the test situation,some suggestions are put forward for the deployment of NB-IoT,which can provide reference for the actual deployment of operators.