隨著科技快速發展以及行動裝置的普及，使用者對於傳輸的需求量越來越高，伴隨著日益豐富的網路服務，用戶對上網品質的要求也日漸重視，3GPP於2008年提出LTE-Advanced作為IMT-Advanced的候選技術提案，其中最關鍵的技術為載波聚合技術，載波聚合即是可以將連續或不連續的載波單元聚合在一起以增大使用頻寬，好滿足大量使用者的需求速率。 由於使用者對於網路服務的需求量持續的上升，雖然載波聚合技術可以聚合多個載波單元來增大使用頻寬，但其頻譜資源還是只有原本的授權頻譜，3GPP便提出將載波聚合技術拓展頻譜至未授權頻譜，故本論文研究當在LTE-Advanced網路下聚合未授權頻譜時，系統該如何有效的在下行鏈路進行資源分配以滿足所有的使用者，本論文提出AHP分配演算法用來分配載波單元給使用者，該演算法在分配載波單元時不但會考慮使用者對於每個載波單元的通道品質量測參數，也會依據載波單元內的負載狀況來分配載波單元，還提出EUEF演算法來分配資源區塊給使用者，此演算法會對不同的訊務類型(GBR、non-GBR)進行更有效率的資源分配，最後模擬的結果將顯示相較於其他方法本論文所提出的方法擁有較好的吞吐量以及使用者滿意度。;With the rapid development of technology and the popularity of mobile devices, the demand of transmission data rate has been increasing. Along with the increasingly rich network services, quality requirements of Internet users are also becoming more important. The 3GPP proposed LTE-Advanced in 2008 as a candidate proposal for IMT-Advanced technology, the carrier aggregation technology is the most critical in LTE-Advanced that can increase the use of bandwidth by aggregating continuous or discontinuous Carrier Components to satisfy a large number of user’s demand. Due to continuoes rise in user demand for Internet services, although carrier aggregation can aggregate multiple Carrier Component to increase the use of bandwidth, but it is still only the original licensed spectrum, the 3GPP has proposed to expand the carrier aggregation spectrum to unlicensed spectrum. Therefore, this thesis is to research when aggregation unlicensed spectrum in the LTE-Advanced network and the system how to effectively allocate resources in the downlink to satisfy all users. This thesis proposes an AHP allocation algorithm to allocate the Carrier Component to the user not only considers the user for each Carrier Component by channel quality measurements parameters, but also based on the load conditions within the cell to assign Carrier Component. We also proposes an EUEF algorithm to allocate resource blocks to the user, This algorithm can be more efficient allocation of resources for different types of traffic services (GBR, non-GBR). Finally, the simulation results will be compared to that by other methods, and it shows the proposed method has better throughput and user satisfaction.
