【NOMA】Resource Allocation for Optimizing Energy Efficiency in NOMA-based Fog UAV Wireless Networks

文章名

Resource Allocation for Optimizing Energy Efficiency in NOMA-based Fog UAV Wireless Networks
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缩写速查
cloud radio access networks (CRANs)
fog radio access networks (FRANs)
collaboration radio signal processing (CRSP)
cooperative radio resource management (CRRM)

文章贡献

• In this article, we study resource allocation in a fog UAV wireless network, where the UAV serves as a temporary mobile base station(BS) to achieve movement of the wireless network coverage area and the fog can bring gain in data rate or network traffic.
• Fog computing aims to reduce response time through processing units located in the edge of the network
• We propose a novel UAV system architecture where FRAN and NOMA coexist. In the presented UAV wireless networks, this article considers a NOMA-based UAV to relieve limited spectrum resources, and introduces fog-based caching technology to release link and traffic burden. Accordingly, these together form a network with high energy efficiency.*

架构

• Multiple adjacent UAVs can interact to form various kinds of topologies
• UAVs are connected to the BBU pool which processes the signal transmitted by fronthaul links which can use millimeter wave technology, while backhaul links are used to connect the macro BS and BBU pool.
• content with high popularity is stored at the edge of the network preferentially and users do not need to obtain it from traditional remote data centers.a caching strategy such as first-in and first-out can be very beneficial in improving overall network capacity

算法

• NOMA technology based UAV Wireless Networks
  考虑4个用户uplink的情况，信道质量好的可以消除信道质量不好的用户对自己的影响。(其实就是SIC解调，不明白可以查阅NOMA)
• subchannel Assignment in UAV Wireless networks
  The assignment of subchannel can be considered a two-sided matching procedure according to the preference lists of both subchannels and users

swapping algorithm交换算法
The purpose of this swapping is for better gains, so the energy efficiency of all participating players cannot be reduced after each successful swapping.

In the swapping process, matched users search users on the other subchannels to form a swap-blocking pair if they can meet the above conditions as shown in Fig. 3

其他因素

As society’ s attention to energy increases, the total energy efficiency is a problem that needs to be considered.
we mainly pay attention to maximizing the total energy efficiency considering the limited transmitted power in this section.

• UAV placement
  
• Caching Model
  
• Energy Efficiency
  

挑战、可提升的地方