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標題: | 細胞網路下的適應性全雙工設計 Adaptive Full Duplex Design in Cellular Networks |
作者: | Shi-Ming Lu 呂士銘 |
指導教授: | 蘇炫榮(Hsuan-Jung Su) |
關鍵字: | 全雙工,混合雙工系統,模式選擇,適應性系統,隨機幾何, Full-duplex,Hybrid duplex system,Mode selection,Adaptive system,Stochastic geometry, |
出版年 : | 2019 |
學位: | 碩士 |
摘要: | 全雙工是一個能同時傳送與接收資料的技術,這項技術可以使頻譜效率提升。然而在細胞網路下,使用全雙工模式相較於半雙工模式會受到更多干擾,這些干擾會導致全雙工的頻譜效率下降,甚至可能比半雙工的頻譜效率差。因此,本篇論文探討基地台在根據自己細胞內的通道信息以及距離關係下該如何適應性地選擇全雙工和半雙工模式。
當基地台做決定時,它將會把來自其他細胞的基地台或用戶端的干擾的集合視為是卜瓦松點過程。而利用細化過程,來自其它基地台或用戶端的全雙工干擾和半雙工干擾也都遵從卜瓦松點過程。我們利用干擾的期望值去計算假想的全雙工速率與半雙工速率。然後,我們將其做比較,採用較好的模式。經過模擬的驗證,我們所提出的方法優於只做半雙工或全雙工的系統。 Full Duplex (FD) is a technique which can transmit and receive on the same frequency band at the same time. Hence, it is able to enhance the spectrum efficiency (SE). However in cellular networks, the base station (BS) which operates in FD mode suffers from more aggregate interference than half duplex (HD). It may lead the FD performance degradation and even worse than HD mode. Therefore, we propose a duplex-switching criterion to help the BS adaptively switch between FD and HD mode according to the channel state information and distance relation in each cell. When the BS has to make a decision of FD/HD operation, it regards the set of interference from BSs/UEs in the other cells as Poisson Point Process (PPP). By using a thinning process, the set of interfering HD BSs/UEs and the set of interfering FD BSs/UEs also follow independent PPP. We calculate the hypothetical FD sum rate and hypothetical HD sum rate by considering the expectation of interference. Then, we compare them and adopt the better mode. After the simulation, the proposed scheme outperforms both HD and FD systems. |
URI: | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/74503 |
DOI: | 10.6342/NTU201902611 |
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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