Research And Implementation Of Transport Layer Performance Meterage And Optimal Scheduling In WIFI Wireless Network

With the rapid development of wifi wireless communication technology and the popularization of intelligent terminal devices with multi network interfaces,the traditional communication protocol cannot meet the demand of new wireless transmission applications.Therefore,improving the reliability,efficiency and security is the key of the wireless communication optimization work.Based on the background,thesis studies the information transmission technology in the wifi network,introduces the SCTP protocol and RUDP protocol into the wifi network,and finally realizes the performance meterage and optimal scheduling of the wireless transmission layer.In the current wifi wireless transmission schemes,the TCP protocol can effectively improve the reliability of data transmission,but the strict reliability guarantee mechanism of TCP is complex,and not suitable for the unstable network environment of wireless.Besides,the RUDP protocol based on UDP protocol realizes unconnected data transmission,which can reduce the transmission delay,ensure the transmission of real-time,but cannot solve the congestion and packetloss of wireless transmission.With the popularity of intelligent terminals with multi network interfaces,the traditional TCP and UDP transport protocols cannot meet the current demand of multi access heterogeneous network transmission.In order to solve the above problems,thesis introduces the SCTP protocol and the RUDP protocol to solve the problem of the TCP and UDP protocol in wireless transmission.The RUDP protocol mainly improves the reliability of the real-time transmission service by adding reliability assurance mechanisms on the upper session layer of the UDP protocol,such as the confirmation mechanism,the time-out retransmission mechanism and so on.The SCTP protocol uses the multi-path transmission functions to achieve concurrent multipath transmission(CMT)and path state detection and switching.In addition,in order to cope with the complex wireless network scenario,thesis adds the scheduling layer on the transport layer to provide the network transmission quality monitoring and the transport protocol scheduling.The data of the transmission quality-monitoring module is provided by the RTP/RTCP protocol.Finally,the new transmission protocol is tested and analyzed based on the file transmission.The experimental results show that the new wireless transmission scheme is in complete accord with design,which can meet the demand daily communication,and can against the attack.