Multi-path Transmission Based On Heterogeneous Self-organizing Cellular Network

With the rapid development of mobile Internet and networking technology,a variety of deployment scenarios(macro base station coverage,micro base station network,ultra dense macro micro joint coverage),multiple connections(D2D,multi-hop relay transmission,mesh network)and V2V communication,M2M,which has a certain self-organizing characteristic network,makes the traditional cellular network and self-organizing network become an inevitable trend in the next generation communication network.However,the current transmission of high definition video service is mostly oriented to the traditional cellular network based on single hop wireless link,which cannot meet the new multi-hop wireless network scene.In order to satisfy the users of new large capacity multimedia services in heterogeneous wireless multi-hop network environment needs,it is necessary for us to study the transmission of high capacity services in wireless multi-hop in the network environment.Aiming at the scene mentioned above,this paper proposes a multi-path closed-loop transmission system based on scalable video coding in the background of heterogeneous ad hoc cellular networks cellular network.This system combines the characteristics of video scalable coding with the multi-path shunting transmission strategy,which enables the sending nodes to adapt to the coding strategy in real time according to the characteristics of the transmission path.This strategy uses multipath parallel distributary transmission technology to increase network throughput,balance network load and increase network fault tolerance,effectively solves the problem of large capacity traffic transmission,and ensures the quality of service of the receiver video.The specific contents of this article are as follows:1.The network environment factors,such as network bandwidth,delay and mode,which affect the service transmission,are considered comprehensively.Different environmental factors have been used to define the link quality information,and a unified representation model of network link quality information is proposed.2.For data transmission of large-capacity services,a multi-path offload transmission strategy is proposed.Using the network link quality information as a criterion,the(Multipath Quality Optimized,MQO)routing algorithm is devised to calculate the parallel transmission of multiple transmission paths from the originating to the terminal link quality,which are arranged in parallel.At the same time,the importance of high-capacity services is classified according to the results of path finding to ensure the optimality of link selection.3.Combining the features of scalable coding of high-definition video services with multi-path transmission strategies,we proposes a multi-path closed loop video transmission algorithm(Video Multipath Quality Optimized,VMQO)and system.The sender encodes the video service into a base layer video and several enhancement layer videos according to the routing path finding result and the network channel status,and uses the VMQO algorithm to find a path from the originator to the terminal with the lowest packet loss rate to transmit the video stream at the base layer.At the same time,the sender find a number of multiple possible paths based on the quality of the link as the trade-off standard to separately transmit the enhancement layer video stream,so as to ensure the reliable transmission of the base layer video frame,and enhance the layer video frame as much as possible The purpose of the acquisition ultimately ensure the quality of the receiver's high-definition video transmission.