本文關(guān)鍵詞：異構(gòu)蜂窩網(wǎng)絡(luò)中資源分配算法的研究與仿真　出處：《東北大學(xué)》2014年碩士論文　論文類(lèi)型：學(xué)位論文

  更多相關(guān)文章： 異構(gòu)蜂窩網(wǎng)絡(luò) 資源分配 功率控制 資源優(yōu)化

【摘要】：為了應(yīng)對(duì)近年來(lái)快速增長(zhǎng)的移動(dòng)通信系統(tǒng)的數(shù)據(jù)業(yè)務(wù),滿(mǎn)足移動(dòng)通信系統(tǒng)用戶(hù)設(shè)備(User Equipment, UE)的性能需求并提升移動(dòng)通信系統(tǒng)的整體性能,第三代合作伙伴計(jì)劃(The 3rd Generation Partnership Project,3GPP)組織在先進(jìn)的長(zhǎng)期演進(jìn)技術(shù)(Long Term Evolution-Advanced, LTE-A)的標(biāo)準(zhǔn)化過(guò)程中,提出了異構(gòu)蜂窩網(wǎng)絡(luò)(Heterogeneous Cellular Networks, HetCNets)的概念。隨著異構(gòu)蜂窩網(wǎng)絡(luò)技術(shù)的興起,我們面臨著許多技術(shù)挑戰(zhàn)�；�(Base Station, BS)之間覆蓋重疊的區(qū)域大大增加,導(dǎo)致異構(gòu)蜂窩網(wǎng)絡(luò)環(huán)境出現(xiàn)更加復(fù)雜的小區(qū)間干擾關(guān)系。較強(qiáng)的小區(qū)干擾會(huì)導(dǎo)致用戶(hù)通話(huà)性能急劇下降甚至出現(xiàn)掉話(huà)；同時(shí),與傳統(tǒng)同構(gòu)網(wǎng)絡(luò)相比,異構(gòu)蜂窩網(wǎng)絡(luò)加入了很多不同類(lèi)型的基站,相當(dāng)于增加了很多小區(qū)邊緣,處在邊緣的用戶(hù)受到的干擾就會(huì)更加復(fù)雜,這樣對(duì)小區(qū)間干擾協(xié)調(diào)有了更高的技術(shù)要求。同時(shí),在異構(gòu)蜂窩網(wǎng)絡(luò)中,由于低功率節(jié)點(diǎn)的部署隨意性較強(qiáng),不像傳統(tǒng)宏蜂窩基站那樣具有規(guī)劃性,所以傳統(tǒng)的干擾協(xié)調(diào)技術(shù)并不適用。為此,針對(duì)下一代無(wú)線(xiàn)異構(gòu)蜂窩網(wǎng)絡(luò)的特點(diǎn),為了減少宏蜂窩基站與其覆蓋范圍內(nèi)的低功率蜂窩基站之間的干擾,本文提出了一種異構(gòu)蜂窩網(wǎng)絡(luò)的資源分配算法,首先根據(jù)基站間干擾關(guān)系建立干擾圖,通過(guò)干擾圖給蜂窩基站分配相應(yīng)的正交資源,然后將蜂窩基站下的用戶(hù)分為中心用戶(hù)和邊緣用戶(hù),中心用戶(hù)可以使用蜂窩網(wǎng)絡(luò)的全部頻帶資源,邊緣用戶(hù)只能使用正交頻帶資源以消除蜂窩基站之間的干擾,最后用戶(hù)根據(jù)改進(jìn)的正比例公平算法選擇合適的資源塊。在異構(gòu)蜂窩網(wǎng)絡(luò)資源分配算法的基礎(chǔ)上,,為了進(jìn)一步提高網(wǎng)絡(luò)吞吐量,在滿(mǎn)足用戶(hù)的基本性能要求下,由異構(gòu)蜂窩網(wǎng)絡(luò)下的基站確定用戶(hù)資源塊上的發(fā)射功率,降低基站和用戶(hù)之間的相互干擾,提升蜂窩基站下用戶(hù)的性能,從而提高整個(gè)蜂窩網(wǎng)絡(luò)的吞吐量。為了評(píng)估和測(cè)試算法性能,本文分別對(duì)所設(shè)計(jì)的算法進(jìn)行了理論求解和仿真。結(jié)果表明,本文所提的算法不僅可以提高異構(gòu)蜂窩網(wǎng)絡(luò)的頻譜資源利用率,降低蜂窩基站之間干擾,使蜂窩基站負(fù)載平衡,還可以提升邊緣用戶(hù)的性能,增加網(wǎng)絡(luò)吞吐量。
[Abstract]:In order to cope with the rapid growth of mobile communication system data services in recent years, to meet the mobile communication system user equipment user Equipment. The performance requirements of UEE and improve the overall performance of the mobile communication system. The 3rd Generation Partnership Project. The 3GPP) organization is in the process of standardizing long Term Evolution-Advanced- (LTE-A), an advanced long-term evolution technology. The concept of heterogeneous Cellular Networks (HetCNETs) is proposed. We face many technical challenges. The coverage of overlapping areas between Base Base Base stations (BSs) is greatly increased. It leads to more complex inter-cell interference relationship in heterogeneous cellular network environment. Strong cell interference will lead to a sharp decline in the performance of user calls and even drop calls. At the same time, compared with the traditional isomorphic networks, heterogeneous cellular networks join many different types of base stations, which is equivalent to increase a lot of cell edge, the edge users will be more complex interference. At the same time, in heterogeneous cellular networks, the deployment of low power nodes is arbitrary, so it is not as planned as the traditional macrocellular base stations. Therefore, the traditional interference coordination technology is not suitable. Therefore, aiming at the characteristics of the next generation wireless heterogeneous cellular network, in order to reduce the interference between the macrocellular base station and the low power cellular base station in its coverage. In this paper, a resource allocation algorithm for heterogeneous cellular networks is proposed. Firstly, the interference graph is established according to the interference relationship between the base stations, and the corresponding orthogonal resources are allocated to the cellular base stations by the interference graph. Then the users under the cellular base station are divided into the central user and the edge user. The central user can use all the frequency band resources of the cellular network, and the edge user can only use the orthogonal frequency band resource to eliminate the interference between the cellular base stations. Finally, the user selects the appropriate resource block according to the improved proportional fairness algorithm. On the basis of the resource allocation algorithm of heterogeneous cellular network, in order to further improve the network throughput. In order to meet the basic performance requirements of users, the transmission power on the user resource block is determined by the base station in the heterogeneous cellular network, which reduces the interference between the base station and the user, and improves the performance of the user under the cellular base station. In order to evaluate and test the performance of the algorithm, the proposed algorithm is solved theoretically and simulated. The proposed algorithm can not only improve the efficiency of spectrum resources in heterogeneous cellular networks, reduce interference between cellular base stations, balance the load of cellular base stations, but also improve the performance of edge users and increase network throughput.
【學(xué)位授予單位】：東北大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類(lèi)號(hào)】：TN929.5

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本文編號(hào)：1389697