Research And Implementation Of Multi-link Cooperative Wireless Transmission Strategy

With the rapid development of mobile communication technology in the military field,wireless communication has become an indispensable part of the battlefield.During the process of wireless transmission,it often causes packet loss and large transmission delay,especially in the battlefield environment.Because of interference and mobility,the network in the battlefield often shows weak connectivity.If a single wireless link is used for transmission at this time,it will cause serious packet loss or throughput degradation.Therefore,in order to ensure the quality of service of communication in the battlefield,multi-link transmission provides a solution for these problems.However,most of the existing multi-link transmission strategies are generally based on wired network with low packet loss rate and small differences in link parameters,which are not applicable to the special environment like battlefield.This thesis is focus on how to use the resources of the battlefield heterogeneous wireless network to increase the efficiency and reliability of transmission through multi-link cooperative transmission.Aiming at the characteristics of heterogeneous wireless networks in the battlefield,this thesis proposes a corresponding multi-link cooperative transmission strategy.The specific contents are as follow:First of all,according to the problems of high packet loss and large difference in the parameters of each link,a multi-link cooperative transmission strategy based on adaptive network coding is proposed.The strategy uses the technology of network coding to ensure the reliability of transmission by introducing a certain redundancy.At the same time,a corresponding scheduling strategy is designed,which can reasonably allocate data to each link according to the change of the network.Secondly,according to the problem of decoding efficiency,a multilink cooperative transmission strategy based on parallel decoding is proposed.Based on this strategy,the buffer structure is set,and the traditional time threshold model is improved.Meanwhile,GP3600 chip is used for decoding optimization.In the end,the multi-link cooperative transmission strategy proposed in this thesis was implemented and verified that it has a good performance through experiments.Besides,by transmitting the text and video service,the strategy was proved that can support the different type of services in the battlefield.