基于光照控制网络的RDM改进数据传输方案

Research of RDM Based Data Transmission Scheme Based on Illumination Control Network

针对远程设备管理(Remote Device Management,RDM)传输方案难以提供可靠数据包传输的问题,提出了两种基于光照控制网络的数据重传方案,分别是基于序列的重传方案和基于定时器的重传方案。在基于序列的方案中,使用了应答数据包的事务编号(Transaction Number,TN),只有当TN的顺序出现丢失或错误时,才执行数据包重传。在基于定时器的方案中,使用了应答数据包的TN与临时缓冲。其中,控制器将数据包存储在缓冲区中,并通过DMX512数据链路发送该数据包。然后,控制器为传输的请求数据包激活重传定时器,并等待应答数据包,根据应答数据包决定后续操作。仿真结果表明,与RDM和E1.45方案相比,所提方案可靠性更高,可对高丢包率网络中的丢失数据包进行有效恢复。

As remote device management(RDM)transmission scheme is difficult to provide reliable packet transmission,two data retransmission schemes based on light control network are proposed,one is based on sequence and the other is based on timer.In the former scheme,the transaction number(TN)of the response packet is used,and packet retransmission will be performed only when the order of TN is lost or in error.While in the second scheme,TN and temporary buffer are used to answer packets.The controller stores data packets in the buffer and sends the packets through the DMX512 data link.Then,the controller activates the retransmission timer for the transmitted request packet,and waits for the reply packet to decide the subsequent operation according to the reply packet.Simulation results show that compared with RDM and E1.45 schemes,the proposed scheme is more reliable and can effectively recover the missing packets in the high packet loss rate network.