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標題: | 毫米波回程網路之第五代無線通訊異質網路系統: 架構設計及網路切片資源配置 Millimeter Wave Backhaul Integrated 5G HetNets: Architecture Design and Slice-tailored Resource Allocation |
作者: | Yi-Hsuan Chiang 江怡萱 |
指導教授: | 廖婉君(Wanjiun Liao) |
關鍵字: | 異質性網路,毫米波回程網路,網路切片,行動邊緣運算,感知無線電,能源收集, Heterogeneous network (HetNet),millimeter wave (mmWave) backhaul,network slicing,mobile edge computing (MEC),cognitive radio (CR),RF-energy harvesting, |
出版年 : | 2018 |
學位: | 博士 |
摘要: | 除了因應資料量迅速增加之外,未來第五代無線通訊還必須解決來自使用者的各式不同且可能互相衝突的服務需求,在涵蓋許多密集布建的小型基地台的異質性網路下引入網路切片概念,資源配置與管理可更加靈活。因此包涵使用者與基地台、基地台與基地台各結點之間回程網路的連結,是決定實現軟體定義網路中將控制平面從資料平面中分離出來的關鍵。本論文討論了許多在此異質網路架構下三個面相所遇到的議題:
無線回程網路:我們提出一個使用毫米波做為回程網路傳輸的分級異質網路架構,此架構可於異質網路中選取最少數量的小型基地台集合做為群集簇頭,用以幫忙中繼回程資料流,我們並且提出一個路徑選擇的策略用以平衡各個群集簇頭的回程資料流量,且有效減少因更改回程路徑而造成的流量波動。 網路切片的傳遞:我們討論了三個不同使用案例在無線接取網路上實行網路切片所會遇到的資源配置問題,這些用例各有各對頻寬、研遲、與行動邊緣運算不同的需求。 接取端的能量擷取:為增進接取端連結的頻譜與能量效率,我們讓擁有感知無線電技術的小型基地台同時能透過無線電能量截取技術支撐本身的耗電,透過適當分配各頻道的功率,讓小型基地台在能量收集與服務使用者模式間切換而達到節能目的。 我們透過對毫米波、網路切片、感知網路、與無線電能量截取等第五代無線網路技術的討論,展示了一個在許多面向都更加彈性的異質性網路架構。並且基於數職模擬所呈現的結果,我們為此異質性網路架構的建置可能性給予一些建議。 For future 5G network, it is expected not only massive traffic growth but a variety of applications services with diverse or conflicting performance requirements. By adopting the concept of network slicing, heterogeneous network (HetNet) composed of densely deployed small cells is able to realize more flexibility in resource allocation and management. Hence, backhaul connections between multi-tier nodes are essential to support the separation of the control plane from the user plane in software defined network (SDN). In this dissertation, we discuss some issues encountered under this network architecture in the following three aspects: Wireless backhaul architecture: A millimeter wave (mmWave) hierarchical small cell backhaul is proposed to optimally select a minimal set of small cells to serve as cluster heads for helping backhaul the underlying small cell traffic. And A path protection strategy is provided to balance backhaul traffic and minimize the fluctuations incurred by rerouting. Network slice delivery: We discuss the resource allocation problems on radio access network (RAN) in three different use cases. Each of them has diverse requirements in terms of bandwidth, latency and mobile edge computing (MEC) assistance. Access link energy harvesting: To improve spectrum and energy efficiency of access links, small cells possessed cognitive radio (CR) capabilities are wirelessly powered by electromagnetic radiation energy (RF-energy). By properly switching small cells to harvesting mode or allocating channel/power for serving their users. From the above studies, we demonstrate a more flexible network by examining some promising 5G technologies, such as mmWave, network slicing, CR and RF-harvesting on the top of HetNet structure in different dimensions. Based on the numerical results, we give some insights into the possibility of such a novel HetNet deployment. |
URI: | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/69870 |
DOI: | 10.6342/NTU201800384 |
全文授權: | 有償授權 |
顯示於系所單位: | 電信工程學研究所 |
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