A Method For Improving Throughput Of WLAN Multi-user System

With the development of intelligent city planning for the development of WLAN wireless network requirements,in the WLAN hotspot community to enjoy and experience better Internet service speed,is the focus of this paper to explore the direction of practice.How to effectively improve and enhance the overall performance of single cell system throughput and user independent performance in the Wlan network,in order to improve the utilization rate of wireless channel,network operators become the pursuit of the goal,and make the manufacturers put forward higher requirements on the overall performance of the WLAN product promotion.Eliminating such as interference inside and outside the systems and the bandwidth limitation to affect the system performance,the current network between WLAN users are still not balanced to use the channel preemption in the same environment,and the user'sdata-service experience is uneven.Meanwhile in the WLAN test project in the course of practice,the multi-users' throughput performance test could not meet the user's needs and experience,unable to compete with competitors in the same test environment.In order to quickly find the deeper reasons affecting the system performance,we intensived study and learned about the influence of throughput in 802.11 n protocol agreement about WMM parameters of different types of AC priority.Through simulation analysis and optimization of WMM parameters,the WMM parameters of AP and STA are disassembled and matched and the association assignment is used for traversal verification in groups in the laboratory tests.Eventually,we find the best matching rule of WMM parametersby matching rules of AP and STA each other to send and receive signals.Compared with the simulation analysis,we put forward the optimization scheme,which is to dynamically adjust the parameter of WMM by period measurement of the avtive user numbers online business status before throughput loss occurs.This scheme is mainly reflected in the characteristics of adaptive dynamic regulation and the avoidance of throughput loss.Changes in the number of users in a timely manner to adjust the WMM parameters to reduce the collision probability,to avoid the loss of traffic in advance,rather than the statistical adjustment of the loss to save.The proposed scheme is well verified in the new field performance test,and laid the cornerstone of the foundation in order to improve the overall throughput performance of WLAN cell and the good perception of shared STA.In the whole practice process,the new algorithm is proved to be successful and effective,it can significantly improve the throughput loss caused by collision between AP and STAs at the same time and has certain popularization and application value,and lays a good foundation for the continuous deepening and improvement of WMM parameters.