【摘要】：當毫微微小區(qū)(Femtocell)高密度部署時,在頻譜共享的毫微微小區(qū)網(wǎng)絡(luò)中,毫微微小區(qū)之間的同層干擾以及毫微微小區(qū)與宏小區(qū)(Macrocell)之間的跨層干擾嚴重限制了系統(tǒng)的性能。在Femtocell大規(guī)模部署時,急需解決Femtocell雙層網(wǎng)絡(luò)中的干擾問題。為緩解干擾,本文研究了宏基站與Femtocell共信道部署組成的Femtocell雙層網(wǎng)絡(luò)中的下行鏈路資源分配問題。第三代合作伙伴計劃(The 3rd Generation Partnership Project,3GPP)標準中規(guī)定了毫微微小區(qū)的三種接入模式:封閉接入模式、開放接入模式以及混合接入模式。本文研究了Femtocell封閉接入方式下的資源分配策略和Femtocell混合接入方式下的信道分配算法。首先,提出了一種基于分組的Femtocell封閉接入方式下的資源分配算法。該算法包括兩部分:一部分是宏基站先利用改進的匈牙利算法為宏小區(qū)用戶分配信道,再用注水算法分配功率,保證宏小區(qū)用戶的正常傳輸;另一部分是在避免干擾宏小區(qū)用戶的基礎(chǔ)上,先采用模擬退火算法對毫微微小區(qū)進行分組,再進行信道和功率分配,在滿足毫微微小區(qū)用戶的數(shù)據(jù)速率需求的同時最大化頻譜效率。仿真結(jié)果表明,該算法有效地抑制了這兩種干擾,既能保證用戶的數(shù)據(jù)速率需求,又能有效提升網(wǎng)絡(luò)頻譜效率。其次,提出了一種適用于Femtocell混合接入方式的信道分配算法。該算法包括兩部分:一部分是根據(jù)毫微微小區(qū)間的干擾將毫微微小區(qū)分到不同的組中,用來減少信道分配的復雜度并減少它們之間的干擾;另一部分是為宏小區(qū)用戶和毫微微小區(qū)用戶分配信道,消除它們之間的頻譜沖突,在保證授權(quán)用戶服務質(zhì)量需求(Quality of Service,QoS)的同時提升非授權(quán)用戶的性能。仿真結(jié)果表明,該算法既能保證用戶的數(shù)據(jù)速率需求,又能保證用戶間的公平性。
[Abstract]:When the femto cell (Femtocell) is deployed with high density, the performance of the system is severely limited by the same layer interference between the femto cell and the (Macrocell) between the femto cell and the macro cell in the spectrum shared femto cell network. When Femtocell is deployed on a large scale, it is urgent to solve the interference problem in Femtocell double layer network. In order to mitigate interference, the downlink resource allocation problem in Femtocell bilevel network composed of Acer station and Femtocell co-channel deployment is studied in this paper. The third Generation Partnership Program (The 3rd Generation Partnership Project,3GPP) standard specifies three access modes for femto cells: closed access mode, open access mode and hybrid access mode. In this paper, the resource allocation strategy for Femtocell closed access and the channel allocation algorithm for Femtocell hybrid access are studied. Firstly, a resource allocation algorithm based on packet-based Femtocell closed access is proposed. The algorithm consists of two parts: one is that Acer station first allocates channels for macro cell users by using the improved Hungarian algorithm, and then distributes power by water injection algorithm to ensure the normal transmission of macro cell users; In the other part, on the basis of avoiding interference with macro cell users, simulated annealing algorithm is used to group the femto cells, and then channel and power distribution are carried out. The spectrum efficiency is maximized while satisfying the data rate requirements of femto cell users. Simulation results show that the proposed algorithm can effectively suppress these two kinds of interference, which can not only guarantee the data rate requirements of users, but also effectively improve the spectral efficiency of the network. Secondly, a channel allocation algorithm for Femtocell hybrid access is proposed. The algorithm consists of two parts: one is to divide the femto cells into different groups according to the interference of the femto cell to reduce the complexity of channel allocation and to reduce the interference between them; The other part is to allocate channels to macro cell users and femto cell users to eliminate the spectrum conflicts between them and to improve the performance of unauthorized users while guaranteeing the quality of service (Quality of Service,QoS) requirements of authorized users. The simulation results show that the algorithm can not only guarantee the data rate requirement of users, but also ensure the fairness between users.
【學位授予單位】：重慶郵電大學
【學位級別】：碩士
【學位授予年份】：2016
【分類號】：TN929.5

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本文編號：2367636