arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2106.11368eess.SPcs.NI
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基于强化学习的可控激光光无线系统资源分配

Reinforcement Learning for Resource Allocation in Steerable Laser-based Optical Wireless Systems

Abdelrahman S. Elgamal, Osama Z. Alsulami, Ahmad Adnan Qidan, Taisir E. H. El-Gorashi, Jaafar M. H. Elmirghani

摘要:

垂直腔面发射激光器(VCSEL)由于其高调制带宽和低制造成本,已经证明适用于室内光无线通信(OWC)系统中的数据传输。具体而言,资源分配是影响多用户光无线系统性能的主要挑战之一。在本文中,一个优化问题,制定最佳分配每个用户到一个光接入点(AP)组成的VCSEL阵列内的多个VCSEL在一定的时间,以最大限度地提高信号与干扰加噪声比(SINR)。在这种情况下,一个混合整数线性规划(MILP)模型来解决这个优化问题。尽管MILP模型是最优的,但由于其高复杂性、高存储器和完整的系统信息要求,它被认为是不切实际的。因此,强化学习(RL)被认为是,最近已被广泛研究的各种优化问题的实际解决方案,在蜂窝网络中,由于其与环境交互的能力,没有以前的经验。特别是,Q学习(QL)算法进行调查,在可操纵的VCSEL为基础的OWC系统的资源管理。结果表明,QL算法能够实现接近MILP模型的最优解。此外,通过光束转向,使用全息图实现利用液晶器件,结果在考虑的网络的性能进一步增强。

英文摘要:

Vertical Cavity Surface Emitting Lasers (VCSELs) have demonstrated suitability for data transmission in indoor optical wireless communication (OWC) systems due to the high modulation bandwidth and low manufacturing cost of these sources. Specifically, resource allocation is one of the major challenges that can affect the performance of multi-user optical wireless systems. In this paper, an optimisation problem is formulated to optimally assign each user to an optical access point (AP) composed of multiple VCSELs within a VCSEL array at a certain time to maximise the signal to interference plus noise ratio (SINR). In this context, a mixed-integer linear programming (MILP) model is introduced to solve this optimisation problem. Despite the optimality of the MILP model, it is considered impractical due to its high complexity, high memory and full system information requirements. Therefore, reinforcement Learning (RL) is considered, which recently has been widely investigated as a practical solution for various optimization problems in cellular networks due to its ability to interact with environments with no previous experience. In particular, a Q-learning (QL) algorithm is investigated to perform resource management in a steerable VCSEL-based OWC systems. The results demonstrate the ability of the QL algorithm to achieve optimal solutions close to the MILP model. Moreover, the adoption of beam steering, using holograms implemented by exploiting liquid crystal devices, results in further enhancement in the performance of the network considered.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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