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在分析煤矿通信技术发展需求的基础上,讨论了作为数据传送载体的煤矿下一代网络传输层平台MNGN-TLP的网络拓扑结构及组成以及MNGN全局拓扑图谱的建立机制,研究了多环互连的MNGN-TLP中的环间传输方法.为了改善其跨环传输性能,提出一种新的近似松散路由的跨环传输算法,通过在数据帧中按倒序方式实时记录和修正当前分组到达目标结点必须经过的所有子环的环标识号,将数据准确传送到目标结点.在NS2环境中建立了MNGN-TLP跨环传输平台,实现了改进的跨环传输算法.结果表明:采用该算法,跨环传输的分组能够正确到达目标结点,监测监控数据的跨环转发平均延时仅600μs,语音数据的跨环转发平均延时为6.40ms,满足煤矿安全生产的实时性要求.
Based on the analysis of the demand for the development of coal mine communication technology, the network topology and composition of MNGN-TLP as the data transmission carrier and the establishment mechanism of MNGN global topology are discussed. In order to improve its cross-ring transmission performance, a new cross-loop transmission algorithm is proposed for loosely-coupled routing, which records and corrects the current packet arrivals at the target node in reverse order in the data frame The ring identification number of all the sub-rings that must pass through to accurately transmit the data to the target node.An MNGN-TLP cross-ring transmission platform is established in the NS2 environment to implement an improved cross-ring transmission algorithm.The results show that: With this algorithm, The cross-ring transmission of packets can reach the target node correctly. The average delay of cross-ring forwarding of monitoring data is only 600μs. The average delay of cross-ring forwarding of voice data is 6.40ms, which meets the real-time requirements of coal mine safety production.