无线传感器网络中基于协作通信的MAC协议研究
发布时间：2018-12-10 08:41
【摘要】：传感器网络与协作通信的结合,可以将传感器节点、物理层技术和无线信道等结合起来,并进一步地研究优化,得以有效地提高整个无线传感器网的频谱利用率及系统性能,而和传统协议设计的差异在于,需要了解系统中各层间的相关性。本文中,主要进行在节点能量有限的无线传感器网络中,基于中继选择与功率分配算法优化的协作MAC协议有关生命周期方面的研究。首先针对传统的中继选择策略中链路信息不足及功率资源利用低等问题,在无线传感器网络场景中,提出基于解码转发方式的中继选择与功率分配策略,以达到最小化系统发射功率的目的。在最大发射功率、平均误比特率及最大信道信噪比限制下,对候选中继节点进行最优功率分配,并根据传输距离和对应的能量消耗完成中继选择,以降低能耗,提升网络寿命。其次,在节点能量受限的无线传感器网络中,综合速率因素和功率因素,提出基于多中继节点优化的协作MAC协议,该协议依据本文提出的中继选择算法,先将选择出的中继节点加入初始的中继集。获得初始的中继集之后,进行多中继优化得到最优的协作集。仿真结果可得出,提出的基于多中继优化的协作MAC协议可有效延伸网络生命周期,减少节点能量损耗。
[Abstract]:The combination of sensor network and cooperative communication can combine sensor node, physical layer technology and wireless channel, and further study optimization, which can effectively improve the spectrum efficiency and system performance of the whole wireless sensor network. The difference with the traditional protocol design is that we need to understand the correlation between the different layers of the system. In this paper, the life cycle of cooperative MAC protocol based on relay selection and power allocation algorithm optimization is studied in wireless sensor networks with limited node energy. Firstly, aiming at the problems of lack of link information and low utilization of power resources in traditional relay selection strategy, a relay selection and power allocation strategy based on decoding and forwarding is proposed in wireless sensor network scenarios. In order to minimize the transmission power of the system. Under the limitation of the maximum transmit power, average bit error rate and maximum channel signal-to-noise ratio, the optimal power allocation is carried out for the candidate relay nodes, and the relay selection is completed according to the transmission distance and the corresponding energy consumption, so as to reduce the energy consumption and improve the network life. Secondly, in wireless sensor networks with limited node energy, a cooperative MAC protocol based on multi-relay node optimization is proposed by synthesizing rate and power factors, which is based on the relay selection algorithm proposed in this paper. First, the selected relay node is added to the initial relay set. After the initial relay set is obtained, the optimal cooperative set is obtained by multi-relay optimization. The simulation results show that the proposed cooperative MAC protocol based on multi-relay optimization can effectively extend the network life cycle and reduce node energy loss.
【学位授予单位】：南京邮电大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TN929.5;TP212.9
本文编号：2370299
[Abstract]:The combination of sensor network and cooperative communication can combine sensor node, physical layer technology and wireless channel, and further study optimization, which can effectively improve the spectrum efficiency and system performance of the whole wireless sensor network. The difference with the traditional protocol design is that we need to understand the correlation between the different layers of the system. In this paper, the life cycle of cooperative MAC protocol based on relay selection and power allocation algorithm optimization is studied in wireless sensor networks with limited node energy. Firstly, aiming at the problems of lack of link information and low utilization of power resources in traditional relay selection strategy, a relay selection and power allocation strategy based on decoding and forwarding is proposed in wireless sensor network scenarios. In order to minimize the transmission power of the system. Under the limitation of the maximum transmit power, average bit error rate and maximum channel signal-to-noise ratio, the optimal power allocation is carried out for the candidate relay nodes, and the relay selection is completed according to the transmission distance and the corresponding energy consumption, so as to reduce the energy consumption and improve the network life. Secondly, in wireless sensor networks with limited node energy, a cooperative MAC protocol based on multi-relay node optimization is proposed by synthesizing rate and power factors, which is based on the relay selection algorithm proposed in this paper. First, the selected relay node is added to the initial relay set. After the initial relay set is obtained, the optimal cooperative set is obtained by multi-relay optimization. The simulation results show that the proposed cooperative MAC protocol based on multi-relay optimization can effectively extend the network life cycle and reduce node energy loss.
【学位授予单位】：南京邮电大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TN929.5;TP212.9
【参考文献】
相关期刊论文 前2条
1 白智全;贾建岚;杨祥来;崔娟;;协作通信网络中基于Lagrange算法的中继选择和功率优化方案[J];山东大学学报(工学版);2012年03期
2 魏翼飞;张勇;宋梅;宋俊德;;一种适用于WiFi Mesh网络的AODV改进路由协议[J];北京邮电大学学报;2007年04期
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