基于MB-OFDM-UWB的煤矿井下无线多媒体传感器网络技术研究
发布时间：2019-04-03 11:02
【摘要】：针对煤矿井下监测环境复杂,无线信道多径衰落严重及传感器网络中节点能量受限等问题,为了保证煤矿安全生产的顺利进行,需要更加全面、准确的获取井下环境监测信息。为此,本文基于MB-OFDM-UWB构建了煤矿井下无线多媒体传感器网络,对其中的若干关键技术进行了研究。主要研究内容和成果如下:(1)针对煤矿井下巷道带状受限空间的特性以及多媒体信息采集的需求,基于MB-OFDM-UWB构建了煤矿井下异构无线多媒体传感器网络系统,设计了网络拓扑结构与工作方式,使网络可以有效工作。(2)针对煤矿井下狭长受限空间中无线信道多径衰落严重,一些位置的节点到基站的信道条件较差的问题,提出了一种煤矿井下异构无线多媒体传感器网络MB-OFDM-UWB时频编码协作传输方案。该方案实现了信道状况较好与较差节点间的协作。仿真结果表明,采用所提出的煤矿井下MB-OFDM-UWB时频编码协作传输方案,显著提高了网络中信道状况较差节点的误码率性能。(3)针对煤矿井下巷道狭长结构的特点,提出了一种基于虚拟网格划分的煤矿井下异构无线多媒体传感器网络PREVG分簇算法。该算法依据网络中节点的通信半径对节点划分虚拟网格进行分簇管理,并在选取上层簇头节点过程中考量节点的剩余能量及所处位置信息。仿真结果表明,采用所提出的煤矿井下PREVG分簇算法能够有效提高网络中数据的传输效率,均衡网络中节点的能量消耗,延长网络的生命周期。(4)针对煤矿井下传感器网络节点能量受限,上层簇头节点与汇聚节点一般距离较远,向汇聚节点传送数据耗能大的问题,结合PREVG分簇算法,提出了一种基于蚁群的煤矿井下异构无线多媒体传感器网络EDACA路由算法。该算法对上层簇头节点引入备选簇头节点,并在簇头节点至汇聚节点的路由选择过程中考量各簇头节点的剩余能量及节点间距离信息。仿真结果表明,采用所提出的煤矿井下EDACA路由算法能够明显减少网络中能量耗尽的节点的数目,保证数据的长效传输,延长网络的生命周期,提升网络的监测性能。以上结果表明,在普通节点数据传输过程中采用所提出的MB-OFDM-UWB时频编码协作传输方案、在普通节点成簇管理过程中采用所提出的PREVG分簇算法以及在簇头节点与汇聚节点通信路径选取过程中采用所提出的EDACA路由算法,能够有效保证煤矿井下异构无线多媒体传感器网络数据传输的可靠性与节点能量有效性。
[Abstract]:In order to ensure the smooth operation of the coal mine safety production, it is necessary to obtain the downhole environmental monitoring information more comprehensively and accurately for the problems of complicated monitoring environment of the underground coal mine, serious multi-path fading of the wireless channel and the limitation of the energy of the nodes in the sensor network. In this paper, the wireless multi-media sensor network in coal mine is constructed based on the MB-OFDM-UWB, and some key technologies are studied in this paper. The main research contents and achievements are as follows: (1) According to the characteristics of the belt-shaped restricted space of the coal mine and the demand of the multimedia information acquisition, the network system of the heterogeneous wireless multimedia sensor in the coal mine is constructed based on the MB-OFDM-UWB, and the network topology and the working mode are designed. So that the network can work effectively. And (2) aiming at the problem that the multipath fading of the wireless channel in the long and narrow confined space of the coal mine is serious, and the channel conditions of the nodes in some positions to the base station are poor, a network MB-OFDM-UWB time-frequency coding cooperative transmission scheme of the underground heterogeneous wireless multimedia sensor network of the coal mine is proposed. The scheme realizes the cooperation between the better channel condition and the poorer node. The simulation results show that the proposed coal mine downhole MB-OFDM-UWB time-frequency coding cooperative transmission scheme significantly improves the bit error rate performance of the poor node in the network. (3) According to the characteristics of the long and narrow structure of the underground tunnel in the coal mine, a network PREVG clustering algorithm of the underground heterogeneous wireless multimedia sensor network based on the virtual grid division is proposed. According to the communication radius of the nodes in the network, the nodes are divided into a virtual grid for clustering management, and the residual energy and the position information of the nodes are considered in the process of selecting the upper layer cluster head node. The simulation results show that the proposed method can effectively improve the transmission efficiency of the data in the network, balance the energy consumption of the nodes in the network, and prolong the life cycle of the network. (4) aiming at the energy limitation of the network node of the underground sensor network of the coal mine, the upper layer cluster head node is far from the common distance of the aggregation node, the problem that the energy consumption is large is transmitted to the aggregation node, and the method is combined with the PREVG clustering algorithm, This paper presents an ant colony-based network EDACA routing algorithm for the underground heterogeneous wireless multimedia sensor network. In that method, an alternative cluster head node is introduce to the upper layer cluster head node, and the residual energy and the inter-node distance information of each cluster head node are taken into account in the route selection process of the cluster head node to the aggregation node. The simulation results show that the proposed underground EDACA routing algorithm can significantly reduce the number of nodes in the network, ensure the long-term transmission of data, prolong the life cycle of the network and improve the monitoring performance of the network. the above results show that the proposed MB-OFDM-UWB time-frequency coding cooperative transmission scheme is adopted in the data transmission process of the common node, in the process of cluster management of the common node, the proposed PREVG clustering algorithm and the proposed EDACA routing algorithm are adopted in the selection process of the cluster head node and the aggregation node communication path, The reliability of the data transmission of the heterogeneous wireless multimedia sensor network in the coal mine and the energy efficiency of the node can be effectively ensured.
【学位授予单位】：北京交通大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TP212.9;TN919.8
本文编号：2453156
[Abstract]:In order to ensure the smooth operation of the coal mine safety production, it is necessary to obtain the downhole environmental monitoring information more comprehensively and accurately for the problems of complicated monitoring environment of the underground coal mine, serious multi-path fading of the wireless channel and the limitation of the energy of the nodes in the sensor network. In this paper, the wireless multi-media sensor network in coal mine is constructed based on the MB-OFDM-UWB, and some key technologies are studied in this paper. The main research contents and achievements are as follows: (1) According to the characteristics of the belt-shaped restricted space of the coal mine and the demand of the multimedia information acquisition, the network system of the heterogeneous wireless multimedia sensor in the coal mine is constructed based on the MB-OFDM-UWB, and the network topology and the working mode are designed. So that the network can work effectively. And (2) aiming at the problem that the multipath fading of the wireless channel in the long and narrow confined space of the coal mine is serious, and the channel conditions of the nodes in some positions to the base station are poor, a network MB-OFDM-UWB time-frequency coding cooperative transmission scheme of the underground heterogeneous wireless multimedia sensor network of the coal mine is proposed. The scheme realizes the cooperation between the better channel condition and the poorer node. The simulation results show that the proposed coal mine downhole MB-OFDM-UWB time-frequency coding cooperative transmission scheme significantly improves the bit error rate performance of the poor node in the network. (3) According to the characteristics of the long and narrow structure of the underground tunnel in the coal mine, a network PREVG clustering algorithm of the underground heterogeneous wireless multimedia sensor network based on the virtual grid division is proposed. According to the communication radius of the nodes in the network, the nodes are divided into a virtual grid for clustering management, and the residual energy and the position information of the nodes are considered in the process of selecting the upper layer cluster head node. The simulation results show that the proposed method can effectively improve the transmission efficiency of the data in the network, balance the energy consumption of the nodes in the network, and prolong the life cycle of the network. (4) aiming at the energy limitation of the network node of the underground sensor network of the coal mine, the upper layer cluster head node is far from the common distance of the aggregation node, the problem that the energy consumption is large is transmitted to the aggregation node, and the method is combined with the PREVG clustering algorithm, This paper presents an ant colony-based network EDACA routing algorithm for the underground heterogeneous wireless multimedia sensor network. In that method, an alternative cluster head node is introduce to the upper layer cluster head node, and the residual energy and the inter-node distance information of each cluster head node are taken into account in the route selection process of the cluster head node to the aggregation node. The simulation results show that the proposed underground EDACA routing algorithm can significantly reduce the number of nodes in the network, ensure the long-term transmission of data, prolong the life cycle of the network and improve the monitoring performance of the network. the above results show that the proposed MB-OFDM-UWB time-frequency coding cooperative transmission scheme is adopted in the data transmission process of the common node, in the process of cluster management of the common node, the proposed PREVG clustering algorithm and the proposed EDACA routing algorithm are adopted in the selection process of the cluster head node and the aggregation node communication path, The reliability of the data transmission of the heterogeneous wireless multimedia sensor network in the coal mine and the energy efficiency of the node can be effectively ensured.
【学位授予单位】：北京交通大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TP212.9;TN919.8
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