基于能效和时延的多跳中继通信系统功率控制算法
Power control algorithm for multi hop relay communication systems based on energy efficiency and delay
  
DOI:
中文关键词:  中继通信;多跳中继;功率控制;能效;时延;遗传算法
英文关键词:relay communications; multi hop relays; power control; energy efficiency; delay; genetic algorithm
基金项目:国家自然科学基金(61871241,61771263)资助项目
作者单位
张士兵 南通大学 信息科学技术学院,江苏南通226019 
陈超 南通大学 信息科学技术学院,江苏南通226019 
李业 南通大学 信息科学技术学院,江苏南通226019 
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中文摘要:
      在多跳中继通信系统中,以能效为优化对象的功率控制算法可以保证功率的有效性,但可能无法满足多跳通信传输时延的要求。为此,文中分析了中继节点发射功率对系统能效和传输时延的影响,提出以能效和传输时延为优化对象的多目标优化功率控制算法。以多跳通信系统节点的发射功率为变量,导出了中继通信系统的能效和传输时延表达式。在此基础上构建了基于系统能效和时延的多目标优化函数及其优化算法。该算法将个体间的线性距离作为拥挤度对个体进行评价,选择较好的父代个体,通过交叉和变异产生新的子代种群,保证了种群后代的多样性,提高了算法的优化精度。仿真结果表明,提出的改进算法能较好地同时满足多跳中继通信能效和时延的要求,可以保证在能效较大的情况下,降低系统的传输时延。
英文摘要:
      In the multi hop relay communication systems, a power control algorithm by taking the energy efficiency as its optimization objective, can guarantee the power effectiveness, but cannot meet the transmission delay needs of multi hop communications. Based on it,the effects of relay node transmitted power on the energy efficiency and the transmission delay are analyzed, and a multi objective optimal power control algorithm is proposed for the energy efficiency and the transmission delay. The expressions of the energy efficiency and the transmission delay of relay communication systems are derived by taking the transmission power of nodes in the system as a variable. On this basis, the multi objective optimization function and its optimizing algorithm were constructed. In the algorithm, the linear distance between individuals is taken as its crowding degree to evaluate the fitness of individuals. The better parent generation individuals are selected to generate new offspring population through crossover and mutation, ensuring the diversity of the descendants and improving the optimization accuracy of the algorithm. The simulation results show that the improved algorithm can meet the requirements of the energy efficiency and the transmission delay in multi hop relay communication systems simultaneously. It can reduce the transmission delay while ensuring high energy efficiency.
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