针对远距离遥感数据传输过程中存在的网络通信高时延、带宽利用率低等问题,在基于TCP(transmission control protocol)和UDP(user datagram protocol)的基础上,提出了一种新型数据传输协议--FRUDP(feedback retransmission user data pr...针对远距离遥感数据传输过程中存在的网络通信高时延、带宽利用率低等问题,在基于TCP(transmission control protocol)和UDP(user datagram protocol)的基础上,提出了一种新型数据传输协议--FRUDP(feedback retransmission user data protocol).该协议依据链路条件将待发数据分包、分组,发送方根据接收方IP地址及对应端口,依序集中发送数据组包及反馈重传包,接收方通过接收、解析数据包头,遍历统计得出数据包接收情况,进而反馈重传统计结果,轮询发送、接收反馈操作直到接收完成.该协议有效地保证了传输数据的准确性,并且使发送方性能获得极大提升,提高了高时延链路环境下的带宽利用率.测试实验结果表明:FRUDP能够有效保障高时延链路条件下的带宽利用率.展开更多
The aim of this paper is to present DCM+, a new congestion control protocol for data networks. It stands for Dynamic Congestion control for Mobile networks. New metrics have been newly invented and introduced like nor...The aim of this paper is to present DCM+, a new congestion control protocol for data networks. It stands for Dynamic Congestion control for Mobile networks. New metrics have been newly invented and introduced like normalized advancing index (NAI) and complete transmission time (CTT). The simulations are done for a simple single-hop-topology (sender-router-receiver). The outcomes of this protocol are excellent and, in most cases, better than other approaches. The excellent properties of our proposed protocol were possible through tracking the available slow-start threshold. We achieved performance improvement, minimized end-to-end delay and large reduction in transmission time. DCM+ was able to combine many advantages at same time of the protocols NewReno and Westwood+. The results show, that DCM+ is extremely adequate for different types of networks. Feedback as main principle of control theory was used to control the congestion in the network. The parameters Round-Trip-Time (RTT) and Retransmission Timeout (RTO) are used as feedback signals to adjust the next congestion window (cwnd).展开更多
文摘针对远距离遥感数据传输过程中存在的网络通信高时延、带宽利用率低等问题,在基于TCP(transmission control protocol)和UDP(user datagram protocol)的基础上,提出了一种新型数据传输协议--FRUDP(feedback retransmission user data protocol).该协议依据链路条件将待发数据分包、分组,发送方根据接收方IP地址及对应端口,依序集中发送数据组包及反馈重传包,接收方通过接收、解析数据包头,遍历统计得出数据包接收情况,进而反馈重传统计结果,轮询发送、接收反馈操作直到接收完成.该协议有效地保证了传输数据的准确性,并且使发送方性能获得极大提升,提高了高时延链路环境下的带宽利用率.测试实验结果表明:FRUDP能够有效保障高时延链路条件下的带宽利用率.
文摘The aim of this paper is to present DCM+, a new congestion control protocol for data networks. It stands for Dynamic Congestion control for Mobile networks. New metrics have been newly invented and introduced like normalized advancing index (NAI) and complete transmission time (CTT). The simulations are done for a simple single-hop-topology (sender-router-receiver). The outcomes of this protocol are excellent and, in most cases, better than other approaches. The excellent properties of our proposed protocol were possible through tracking the available slow-start threshold. We achieved performance improvement, minimized end-to-end delay and large reduction in transmission time. DCM+ was able to combine many advantages at same time of the protocols NewReno and Westwood+. The results show, that DCM+ is extremely adequate for different types of networks. Feedback as main principle of control theory was used to control the congestion in the network. The parameters Round-Trip-Time (RTT) and Retransmission Timeout (RTO) are used as feedback signals to adjust the next congestion window (cwnd).
