面向物联网的机会网络信息传输最优控制策略

Optimal control strategy of information transmission in opportunistic network oriented to internet of things

面向大规模物联网系统高动态、运行环境复杂等特征,构建了基于机会网络的存储携带转发信息传输模式,进而提出了带有传输不确定性的信息传输性能评估模型。在此基础上,综合考虑信息传输过程的能量消耗与传输性能等目标,提出了基于庞特李雅金极大值定理的最优传输策略。进一步,通过理论分析证明了最优传输策略服从阈值形式。仿真实验表明,模型的误差低于4.08%。同时,实验也表明所提出的最优传输策略明显优于传统的静态策略,并随着信息有效期的递增,性能表现更好。

In light of the high dynamic property and the complex running environment of the Internet of Things,this paper sets up a store-carry-forward information transmission mode based on the opportunistic network.Then,it proposes a theoretical model to evaluate the performance of the information transmission process with uncertainty.According to the model,considering both the energy consumption and transmission performance,this paper proposes the optimal transmission policy by the Pontryagin’s maximum principle,and proves that the policy conforms to the threshold structure.Finally,several experiments signify that the model is accurate with the error below 4.08%.At the same time,the experiments show that the optimal policy is better than the traditional static policy,and gets better with the increasing of the information’s lifetime.