低轨卫星无线接入网切片资源分配研究

Research on Resource Allocation of Low Earth Orbit Satellite Radio Access Network Slice

摘要: 随着低轨卫星网络规模扩大及其业务多样化发展，如何在动态网络环境下实现高效的切片资源分配成为亟待解决的关键问题。针对这一挑战，本文就低轨卫星无线接入网切片资源分配问题，提出一种基于模型强化学习的动态优化策略。本文将低轨卫星无线接入网切片资源分配问题建模成了一个控制问题。这个控制问题要求分配策略运行在的网络中在线学习，并且在学习过程中保持服务水平协议违约率低于阈值。在此基础上，本文提出了基于模型的强化学习的资源分配策略。策略包含一个基于核方法的分类器和一个用于控制模型预测错误率的模型自评估机制。实验结果表明，与其他强化学习策略相比，本文的策略在资源利用率、服务稳定性、平均执行时间等性能指标上均更优，更加适应低轨卫星网络环境。

Abstract: With the rapid expansion of low Earth orbit (LEO) satellite networks and the diversification of their services, how to achieve efficient resource allocation for network slicing in dynamic networking environments has become a critical challenge. To address this problem, this paper proposes a model- based reinforcement learning (MBRL) optimization strategy for radio access network (RAN) slicing resource allocation in LEO satellite networks. We formulate the RAN slicing resource allocation problem as a constrained control problem that requires: the allocation policy to perform online learning within the operational network, while maintaining the service level agreement (SLA) violation rate below a predefined threshold during the learning process. Building upon this formulation, we propose an MBRL-based resource allocation strategy featuring: a kernel method-based classifier for predictive modeling, and a model self-evaluation mechanism for error rate control. Experimental results demonstrate that compared with other reinforcement learning approaches, our strategy shows superior performance across multiple metrics including resource utilization efficiency, service stability, and average execution time, proving better adaptability to the unique characteristics of LEO satellite networks.