arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2102.03405cs.ITmath.IT
收藏

基于网络编码和多级缓存的异构网络的吞吐量最大化

Throughput Maximization of Network-Coded and Multi-Level Cache-Enabled Heterogeneous Network

Mohammed S. Al-Abiad, Md. Zoheb Hassan, Md. Jahangir Hossain

摘要:

支持多级缓存(MLCE)的网络的最大优势之一是将内容推到网络边缘附近,并在多个发射机处主动缓存它们(即,小型基站(SBS)、无人驾驶飞行器(UAV)和启用高速缓存的设备到设备(CE-D2 D)用户)。因此,减轻了核心网络与大量发射机之间的前传拥塞。为了这个目标,我们利用网络编码(NC)调度一组用户到同一个发射机。针对这一点,我们考虑吞吐量最大化问题,优化联合网络编码的用户调度和功率分配,受到前传容量,发射功率和NC约束。鉴于问题的棘手性,我们将其解耦为两个独立的子问题。在第一个子问题中,我们考虑了网络编码的用户调度问题,对于给定的功率分配,而在第二子问题中,我们使用NC产生的用户调度优化的功率水平。我们设计了一个创新的\textit{two-layered rate-aware NC (RA-IDNC)}图来解决第一个子问题,并使用迭代函数评估(IFE)的方法来评估第二子问题。仿真结果描绘的吞吐量增益所提出的方法在现有的解决方案。

英文摘要:

One of the paramount advantages of multi-level cache-enabled (MLCE) networks is pushing contents proximity to the network edge and proactively caching them at multiple transmitters (i.e., small base-stations (SBSs), unmanned aerial vehicles (UAVs), and cache-enabled device-to-device (CE-D2D) users). As such, the fronthaul congestion between a core network and a large number of transmitters is alleviated. For this objective, we exploit network coding (NC) to schedule a set of users to the same transmitter. Focusing on this, we consider the throughput maximization problem that optimizes jointly the network-coded user scheduling and power allocation, subject to fronthaul capacity, transmit power, and NC constraints. Given the intractability of the problem, we decouple it into two separate subproblems. In the first subproblem, we consider the network-coded user scheduling problem for the given power allocation, while in the second subproblem, we use the NC resulting user schedule to optimize the power levels. We design an innovative \textit{two-layered rate-aware NC (RA-IDNC)} graph to solve the first subproblem and evaluate the second subproblem using an iterative function evaluation (IFE) approach. Simulation results are presented to depict the throughput gain of the proposed approach over the existing solutions.

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。

↑