三維空間中的無線網路分析與設計

Abstract

隨著無人駕駛飛行載具的發展，傳統地面網路漸漸向天空中延伸。因應未來飛行載具的普及等，現行架構下的二維無線網路勢必要有所調整。 本文探究在純三維網路布建的情形下，無線隨意網路與含基礎設施網路之布建。以隨機幾何圖作為工具，分析三維網路的基本性質。探究無線隨意網路中的連接性、路徑長與通信半徑、裝置密度的關聯性。另外將概念從二維基礎設施網路的布建，延伸到三維空間，探討基礎設施網路中重要議題。包含網路佈建結構，系統容量、干擾與通信範圍、頻率再利用、還有路徑衰減指數的關係，說明三維基礎設施網路佈建之要點。

With the development of the unmanned aerial vehicle (UAV), the traditional terrestrial wireless network is now extending to the sky. Consider the condition with UAV fleets and devices all over the sky, the recent structure of two dimensional network should be adjusted. In this article, we investigate the pure 3-dimensional wireless network including the ad-hoc network and the infrastructured wireless network. We use random geometric graph (RGG) as a tool to analyze the characteristic of three dimensional network, and investigate how the important issue (ie. Connectivity, path length) in ad-hoc network related to the total number and the communication radius of the device. Then, we extend the concept of infrastructured wireless network in two dimensional space to three dimensional space, investigate the important issue, including the structure of the 3-dimensional infrastructured network and the relations between system capacity, interference and the cell size, frequency reuse, and the pathloss exponent. Summarize the design issue of infrastructured wireless network in three dimensional space.