面向WIA-FA网络下行传输的灵活可靠重传方法

Flexible and Reliable Retransmission Method for Downlink Transmissions in WIA-FA Networks

针对恶劣射频环境下的大规模WIA-FA(industrial wireless network for industrial automation-factory automation)网络可靠传输问题,提出了一种面向WIA-FA网络下行数据传输的灵活可靠重传方法(flexible and reliable downlink retransmission,FRDR)。首先,设计一种新型超帧结构以支持循环重传和按需重传的混合重传模式。其次,分别对循环重传与按需重传两种重传模式进行了可靠性建模,网关基于分析结果动态选择更可靠的重传模式进行数据传输。最后,通过大量仿真验证了FRDR相比于传统的重传方法的可靠性优势。

Massive industrial wireless networks for industrial automation-factory automation(WIA-FA)networks in hostile radio frequency environments are associated with unreliable transmission.Hence,to resolve this issue,we propose a flexible and reliable downlink retransmission(FRDR)method for downlink transmission in WIA-FA networks.For this,we first design a novel superframe architecture that supports a hybrid cyclic/on-demand retransmission mode.Second,we perform reliability modeling to cyclic retransmission mode and on-demand retransmission mode.The obtained analysis results facilitate the selection of a more reliable retransmission scheme dynamically.Finally,the results of extensive simulations validate the reliability advantage of FRDR over the existing retransmission methods.