Energy efficiency and area spectral efficiency tradeoff for coexisting wireless body sensor networks



The coexistence of wireless body sensor networks (WBSNs) is a very challenging problem, due to strong interference, which seriously affects energy consumption and spectral reuse. The energy efficiency and spectral efficiency are two key performance evaluation metrics for wireless communication networks. In this paper, the fundamental tradeoff between energy efficiency and area spectral efficiency of WBSNs is first investigated under the Poisson point process (PPP) model and Matern hard-core point process (HCPP) model using stochastic geometry. The circuit power consumption is taken into consideration in energy efficiency calculation. The tradeoff judgement coefficient is developed and is shown to serve as a promising complementary measure. In addition, this paper proposes a new nearest neighbour distance power control strategy to improve energy efficiency. We show that there exists an optimal transmit power highly dependant on the density of WBSNs and the nearest neighbour distance. Some important properties are also addressed in the analysis of coexisting WBSNs based on the IEEE 802.15.4 standard, such as the impact of intensity nodes distribution, optimal guard zone, and outage probability. Simulation results show that the proposed power control design can reduce the outage probability and enhance energy efficiency. Energy efficiency and area spectral efficiency of the HCPP model are better than those of the PPP model. In addition, the optimal density of WBSNs coexistence is obtained.


本文采用随机几何分析方法, 采用了两种随机几何模型: PPP(泊松点过程)模型和HCPP(中心点过程)模型, 提出了共存无线体域网络的能量效率和区域频谱效率的折中关系, 并对在两种模型下的能效和频效关系进行了比较, 得出了在一定共存密度下的可行域。另外, 本文还提出了一种基于邻居节点距离的功率控制方法。通过对无线体域网络共存的性能分析研究, 可对无线体域网的系统设计提供一种参考或依据。

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Correspondence to Cheng-Xiang Wang.

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Liu, R., Wang, Y., Wu, S. et al. Energy efficiency and area spectral efficiency tradeoff for coexisting wireless body sensor networks. Sci. China Inf. Sci. 59, 122311 (2016).

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  • WBSNs coexistence
  • stochastic geometry
  • energy efficiency
  • area spectral efficiency
  • power control


  • 无线体域网共存
  • 随机几何
  • 能量效率
  • 区域频谱效率
  • 功率控制