With Ack The P Probability Csma Wireless Lan Mac Protocol Analysis

State "Twelve Five-Year" plan-an explicit proposal to develop "Internet of Things". WLAN as a very important things have also been widespread concern aspects of the current WLAN standard IEEE 802.11 series of commonly used protocols have advantages and disadvantages, so the research of high throughput volume, low latency wireless LAN MAC protocol is no doubt the important.In this paper, based on a wireless LAN MAC layer protocol for the research work, study and master the wireless LAN MAC protocol on the extensive literature, summarized and typical MAC protocol summarized the basic working principle. carefully analysis of the ALOHA multiple access, CSMA multiple access technology and the 802.11 standard. Because of studying these agreements found that the current important research agreement focused on the low point of collision rate, low latency, high throughputUnder the guidance of my instructors, I have studied and researched relevant literature, Chapter III in this paper, "p-probability CSMA with ACK wireless LAN MAC protocol analysis", the packet transmission period TP by dividing the information packet transmission time for the information 1. the line delay time a. ACK confirmation signal, to arrive within three hours of information sub-grouping control method used in different time periods, respectively, p probability of detection and of using non-adhere to the access channel:First, send the information within time 1 The information packet arrival probability p detected by continuous listening channel, using the probability 1-p to give up listening channel. Second, the delay of a packet within the reach of information access by way of non-adhere to the radio channel. Third, in the acknowledgment signal ACK within the time information packet is also insisted by way of non-access channel. After determining the working mechanism of the agreement, a mathematical model, deduced by careful analysis of the information packet sent successfully, the information packet collision, the channel is idle, the average length of three types of events, using the average cycle method, by throughput, delay and other systems Mathematical Analysis of performance style. Using MATLAB on the paper's computer system simulation protocol, the comparison revealed that the value of theoretical analysis and simulation of the value of a good coincidence that the experimental results verify the theoretical analysis model.Fourth chapter summarizes the studying of postgraduate research projects and achievements during the period, the focus described in the central and local governments to build teacher characteristics and advantages of university academic network communications and wireless communications laboratory work done by the project.