以公平性為考量之LTE-A上行訊務排程方法研究;Study of Fairness Based Uplink Scheduler for LTE-A Network

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題名:	以公平性為考量之LTE-A上行訊務排程方法研究;Study of Fairness Based Uplink Scheduler for LTE-A Network
作者:	黃啟賢;Huang, Qi-Xian
貢獻者:	通訊工程學系
關鍵詞:	進階長期演進技術;單載波正交頻分多址;正交頻分多址;多載波正交頻分多址;LTE-Advanced;SC-FDMA;OFDMA;Multi-Cluster-SC-FDMA
日期:	2017-08-11
上傳時間:	2017-10-27 14:02:26 (UTC+8)
出版者:	國立中央大學
摘要:	LTE-A（Long Term Evolution Advanced）是3GPP推出的4G網路主流技術。在無線資源調度方面，由無線資源管理單位（Radio Resource Management, RRM）來實現目標。SC-FDMA（Single-carrier Frequency-Division Multiple Access）具有比OFDMA（Orthogonal Frequency Division Multiple Access）較低之PAPR（Peak to Average Power Ratio），考量手機省電因素，LTE-A的Uplink採用SC-FDMA技術，SC-FDMA傳輸資料量低，所以要求調度傳輸分配給任一用戶之RB（Resource Block）必須是連續的，使得Downlink調度傳輸不能直接應用OFDMA技術在Uplink調度傳輸。 3GPP於Rel.8上行提出SC-FDMA，為了使UE選擇RB彈性，提昇系統吞吐量（throughput），於Rel.10推出了Multi-Cluster SC-FDMA載波技術，支援一個UE最多可以有2個clustered SC-FDMA之連續性分配，因此本論文參考文獻[1]之文章，引入此關鍵技術，並設計一個權值公式（weight function）來考量其公平性（fairness）及吞吐量。最後模擬結果，除了符合規格之連續分配資源的規範，頻寬需求和用戶間通道品質考量之步驟，也加入了Multi-Cluster SC-FDMA技術、權值公式設計，達到系統頻寬資源之公平分配與吞吐量的提昇。【關鍵詞】 LTE-Advanced、OFDMA、SC-FDMA、Multi-Cluster SC-FDMA ;LTE-A (Long Term Evolution Advanced) was proposed by 3GPP, is the main technology of 4G Network. The RRM unit would fulfill the work for wireless resource scheduling. LTE-A uplink scheduling uses SC-FDMA technique to allocate continuous RBs for each UE, because it has low data-rate and its PAPR is lower than OFDMA. Lower PAPR can save UE’s battery energy. Therefore, OFDMA technique can not be applied on uplink scheduling transmission. 3GPP launched the Multi-Cluster Carrier technique in Rel.10 to make UEs can choose a flexible RB to enhance system throughput. Each UE could be assigned up to two continuous RBs allocation. This paper refers to a conference article which posted in VTC Fall [1], and will adopt this key technique to take throughput and fairness into consideration. Simulation result finally shows that not only can meet the standard of continuous resource allocation, but take Bandwidth requirement and channel quality into account between UEs, and designs a design weight function with Multi-Cluster technique to achieve fairness of system bandwidth resource and throughput enhancement. Keyword : LTE-Advanced、SC-FDMA、OFDMA、Multi-Cluster SC-FDMA
顯示於類別:	[通訊工程研究所] 博碩士論文

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