一维传感网中混合数据传输的能量均衡

发布时间：2019-05-10 23:30

【摘要】：无线传感器网络的固有通信特征会引发能耗不均衡现象,进而产生能量空洞问题;混合数据传输是新近提出的一种能量空洞避免策略,其能量均衡性能主要取决于各节点的传输概率.然而,传输概率的设置还缺乏相关理论模型的指导,而且在节点传输距离受限的条件下能否通过混合传输策略实现全网能量均衡,还有待进一步研究.将一维网络中混合传输策略的能量均衡问题转化为传输概率的优化分配问题,通过相应的形式化模型,推导传输概率的精确表达.研究中发现:传输概率主要取决于节点的位置,但当网络片段的个数超过某一阈值时,传输概率的取值非法,无法应用混合传输策略均衡网络能耗.在此基础上,从理论上给出了全网能量均衡的条件,证明仅当网络片段数不超过n0时全网能量均衡才能实现,n0仅取决于一个文中新发现的系数α,α是通信系统的能耗溢价率.还分析了传输距离设置对能量均衡的影响,给出了一般情况下混合传输策略的能量均衡上限.通过仿真实验对所给出的能量均衡条件进行了验证,实验结果与理论分析表明:该条件下,基于所提方法设置传输概率,能够均衡所有节点的能耗.
[Abstract]:The inherent communication characteristics of wireless sensor networks will lead to uneven energy consumption, which will lead to the problem of energy voids. Hybrid data transmission is a newly proposed energy hole avoidance strategy, and its energy equilibrium performance mainly depends on the transmission probability of each node. However, the setting of transmission probability still lacks the guidance of the relevant theoretical model, and it needs to be further studied whether the energy balance of the whole network can be achieved through the hybrid transmission strategy under the condition that the transmission distance of the nodes is limited. The energy balance problem of hybrid transmission strategy in one-dimensional network is transformed into the optimal allocation problem of transmission probability. The exact expression of transmission probability is deduced through the corresponding formal model. It is found that the transmission probability mainly depends on the location of the nodes, but when the number of network segments exceeds a certain threshold, the value of the transmission probability is illegal, and the network energy consumption can not be equalized by using the hybrid transmission strategy. On this basis, the energy equalization conditions of the whole network are given theoretically. It is proved that the energy equilibrium of the whole network can be achieved only if the number of network segments does not exceed n _ 0, and that n _ 0 only depends on the newly discovered coefficient 伪 in one paper. A is the energy consumption premium rate of communication system. The influence of transmission distance setting on energy balance is also analyzed, and the upper limit of energy balance of hybrid transmission strategy is given. The experimental results and theoretical analysis show that the energy consumption of all nodes can be balanced by setting the transmission probability based on the proposed method.
【作者单位】：西北工业大学计算机学院;
【基金】：国家重大科技专项(2012ZX03005007) 陕西省自然科学基金(2013JQ8041) 西北工业大学基础研究基金(JC20110268)
【分类号】：TP212.9;TN929.5

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