Design And Implementation Of Mobile Formation Communication System Based On WiFi Hotspot 2.0 And WiFi Direct

The low cost and simple realization of the construction of mobile ad hoc network and formation communication network has great economic and practical significance for production and life as well as military action.WiFi communication technology has become the most widely range of wireless short-range communication technology with its stable,high-speed,secure communication performance and low-cost characteristics of chip manufacturing.In view of the shortcoming of current WiFi communication that can only be transmitted within a single hop range,this paper studies two common technologies in the WiFi protocol cluster,WiFi Direct and WiFi Hotspot 2.0,and discover two technologies under specific conditions,it can be interconnected at the same time to realize network transmission within multi-hop range.On this basis,a mobile group communication system integrating voice text message transmission,personnel statistics,personnel search and location sharing is designed and implemented.As far as the current mobile terminal,there is a lack of a low-cost implementation of a mobile ad hoc network.This paper firstly proposes a combination of two communication technologies using the WiFi protocol to achieve long-distance multihop transmission,without the root system and changing the WiFi chip driver source code,the stability and security of the native system is guaranteed;secondly,in terms of application,it provides a stable and convenient communication system for the group tourism in the absence of a mobile network environment.The system can provide voice message service,online personnel statistics service and accurate location service in real time.Finally,in order to improve the availability of the system.The system has designed multiple rounds of edge search and the main relay node election based on the remaining power,which realizes the system's out-of-group search function and intergroup communication function.At the end of the paper,the overall function and stability of the mobile formation communication system are also tested.The experimental results show that the system can provide stable and efficient communication services for group members under various environments and devices,and can dynamically monitor group members activity.It can also provide timely and effective search for out-of-group members,reduce the loss of group members,and provide a stable and efficient temporary communication system for group activities such as group tourism.