Research On Multi-carrier Bandwidth Fusion Transmission Of HD Video

With the rapid development of mobile cellular network technology and high-definition video technology,the quality and scale of wireless streaming services have gradually expanded,and are becoming an important part of current Internet traffic because of their advantages in transmission efficiency,clarity,and interactive capabilities.In 4G network wireless video transmission,network transmission quality is affected by signal strength,operator coverage,operator differences in upstream and downstream bandwidth configurations,and differences in network card equipment,which may lead to massive packet loss and video quality degradation.Even in 5G networks,it is still difficult for single-operator networks to fully meet the demand for HD video transmission.Link aggregation provides a simple and efficient method to scale network bandwidth by forming a logical path from multiple integrated physical links,and improving network throughput and robustness by sharing traffic among link aggregation member ports.In this paper,we combine the idea of link aggregation to address the current problems of unstable mobile networks and difficult network bandwidth scaling,with the aim of improving HD video transmission performance from the following aspects.(1)In-depth study of the research background and status of cellular mobile networks,HD video technology,streaming media technology and link aggregation,analysis of the key technical theories and technical difficulties of load balancing in link aggregation,discussion of wireless network aggregation scenarios for this paper,and the implementation of scalable wireless bandwidth convergence schemes in the application layer.(2)Design and development of a multi-operator bandwidth aggregation transmission system based on 4G networks.The system includes a client and an server on the cloud,and uses a UDP-based application layer multiplexing protocol to constitute the core transmission platform to realize a stable high-throughput link in the weak network.(3)In-depth study of the data scheduling scheme in link aggregation,combined with the transmission characteristics of wireless channels,the dynamic smoothing weighted(DSWRR)load balancing algorithm is used to evenly distribute video streams to multiple channels to achieve bandwidth convergence in multi-operator networks.