Design And Implementation Of Wi-Fi Direct Channel Intelligent Selection Software System For Android Phone

As the continuous development of the Internet,we are stepping into a high-speed Information Age,the mobile internet occupies important position in the network.Smartphones are the most commonly used devices to access internet,understanding and mastering its technology are crucial.Since Android was purchased by Google in 2007,the upgrades of android system attracts close attentions in the market,various aspects including the gorgeous design of user interface and inter-cooperation lead to android's great success.At the same time Wi-Fi as a convenient and efficient wireless LAN transmission technology,Its emergence and development of the network greatly liberated the traditional problem of limited range of mobile devices.Since the Android system with the market is more popular Wi-Fi Direct technology to introduced Wi-Fi Display function of the product,The discussion about the wireless HD video transmission technology has never stop.Due to the shortage of spectrum resources and interference from other same-frequency wireless devices such as Bluetooth,Wi-Fi 2.4 GHz frequency band network is very busy.In addition,in order to meet the wireless high-definition video transmission of real-time signal and stability of the demand,reasonable choice of 2.4 GHz Wi-Fi channel on the band is particularly important.Against this background paper includes the following.First of all,The article introduced Android system structure and the Android system in the key technical knowledge,and described the physical characteristics of Wi-Fi 802.11 and the key type to use MAC frame structure,for modify the code for the analysis of experimental results and pave the way.Then it analyzes the technical architecture and implementation principle of Wi-Fi part in Android system.It focus on the wpa_supplicant code framework,and points out the deficiencies and improvement methods of the existing Wi-Fi Direct channel selection scheme in Android system.Then modify and compile the Andrew system source code,and control experiments were carried out before and after the program modification.Experimental simulation in two different wireless environments to transfer large-capacity files,the quality of Wi-Fi Direct communication is judged by observing the automatic channel selection,transmission rate and transmission time.Experimental results show that in Wi-Fi Direct communication through the realization of a reasonable adaptive channel selection function will make a greater degree of increase in transmission rate and stability.The innovations for this work can be summarized as follows,through the system software to modify the way,it could be more flexibility and iterations than traditional hardware upgrades.Users can complete the Wi-Fi Direct channel smart selection through system upgrade.