本文選題：異構(gòu)無(wú)線蜂窩通信網(wǎng) + 小區(qū)內(nèi)干擾管理��； 參考：《南京理工大學(xué)》2014年博士論文

【摘要】：隨著移動(dòng)互聯(lián)網(wǎng)的快速發(fā)展和智能終端的廣泛應(yīng)用,人們對(duì)無(wú)線蜂窩通信網(wǎng)絡(luò)的容量、延時(shí)和覆蓋范圍等性能都提出了更高的要求。為了提高無(wú)線蜂窩通信網(wǎng)絡(luò)的性能,學(xué)術(shù)界和工業(yè)界正研究在傳統(tǒng)無(wú)線宏蜂窩通信網(wǎng)絡(luò)中加入許多小功率基站,如微微蜂窩基站(picocell base station)、毫微微蜂窩基站(femtocell base station)和中繼站(relay)等。這樣形成的異構(gòu)的新興無(wú)線網(wǎng)絡(luò)已成為當(dāng)前無(wú)線通信領(lǐng)域的研究熱點(diǎn)。相比于傳統(tǒng)無(wú)線宏蜂窩通信網(wǎng)絡(luò),新興無(wú)線蜂窩通信網(wǎng)絡(luò)中基站密度大大增加,網(wǎng)絡(luò)結(jié)構(gòu)復(fù)雜度也大大增加；且由于頻率資源非常有限,不同類型的基站一般使用相同的頻段,因而網(wǎng)絡(luò)中不但同頻干擾強(qiáng)度大大增加,而且干擾結(jié)構(gòu)和環(huán)境的復(fù)雜度也大大增加。同時(shí),隨著基站密度的增加,移動(dòng)終端同時(shí)檢測(cè)到的基站數(shù)量增大,且不同類型基站的覆蓋范圍大小不同且相互部分重疊,這就使得移動(dòng)終端的越區(qū)切換管理更加復(fù)雜。因此,新興無(wú)線蜂窩通信網(wǎng)絡(luò)中有效的干擾管理和越區(qū)切換管理成為提高網(wǎng)絡(luò)性能的關(guān)鍵,對(duì)其進(jìn)行的研究具有重要的理論意義和實(shí)用價(jià)值。本論文研究了新興無(wú)線蜂窩通信網(wǎng)絡(luò)中的干擾管理和越區(qū)切換管理問(wèn)題,以期為新興無(wú)線蜂窩通信網(wǎng)絡(luò)的廣泛應(yīng)用提供一定的理論和技術(shù)參考,主要研究?jī)?nèi)容、創(chuàng)新點(diǎn)和取得的研究成果如下：(1)研究了小區(qū)內(nèi)不同移動(dòng)終端之間的干擾管理問(wèn)題。本文分析了當(dāng)前基于信號(hào)與泄漏加噪聲比(signal to leakage plus noise ratio, SLNR)準(zhǔn)則的小區(qū)內(nèi)多個(gè)移動(dòng)終端發(fā)射波束成形的干擾管理方案存在的局限性及產(chǎn)生局限性的根本原因。針對(duì)其局限性及原因,本文提出了一種改進(jìn)方案。該改進(jìn)方案把接收機(jī)結(jié)構(gòu)融合在發(fā)射波束優(yōu)化過(guò)程中,使優(yōu)化過(guò)程中的信號(hào)強(qiáng)度和干擾(或泄漏)強(qiáng)度的描述更加準(zhǔn)確,從而使設(shè)計(jì)的發(fā)射波束成形矩陣能夠更加準(zhǔn)確地減小不同移動(dòng)終端間的同信道干擾。從理論上看,該改進(jìn)方案具有更加通用的形式,適用于多種接收機(jī)結(jié)構(gòu)或接收濾波器；從系統(tǒng)性能看,相比于原始方案,該改進(jìn)方案對(duì)系統(tǒng)中移動(dòng)終端的等效信號(hào)干擾噪聲比有約2 dB的增益,因而提高了數(shù)據(jù)傳輸速率。在多路數(shù)據(jù)流情景下,本文提出了一種新的模型,即層SLNR模型,該模型不但考慮了不同移動(dòng)終端的數(shù)據(jù)流之間的干擾,而且考慮了來(lái)自相同移動(dòng)終端的不同數(shù)據(jù)流之間的干擾(在前人的研究中,此干擾一般假設(shè)為零)。因而信號(hào)與干擾的建模更加精細(xì)和準(zhǔn)確,優(yōu)化得到的預(yù)編碼向量使信號(hào)與干擾達(dá)到了較好的平衡,從而使每個(gè)數(shù)據(jù)流都有較好的接收質(zhì)量。(2)研究了用于小區(qū)間干擾管理的無(wú)線信令信息的傳輸設(shè)計(jì)問(wèn)題。本文綜合分析了無(wú)線蜂窩通信網(wǎng)中傳統(tǒng)無(wú)線信令信號(hào)的功能、設(shè)計(jì)要求、特點(diǎn)、傳輸和實(shí)現(xiàn)方式,并在不同場(chǎng)景下比較了多種典型的傳統(tǒng)無(wú)線信令的檢測(cè)性能。由于傳統(tǒng)無(wú)線信令信號(hào)是針對(duì)服務(wù)基站而設(shè)計(jì)的(只用于小區(qū)內(nèi)信息傳輸),且在無(wú)線信道中極易受到干擾,傳統(tǒng)無(wú)線信令信號(hào)不適用于新興無(wú)線蜂窩通信網(wǎng)小區(qū)間無(wú)線信令傳輸,特別是在多發(fā)射機(jī)環(huán)境下其檢測(cè)性能迅速惡化。因此,本文提出了一種新的無(wú)線信令信號(hào)方案(即單音信令信號(hào)方案),從理論上證明了該信號(hào)具有最大碼距可分離性和多信號(hào)可分辨性,詳細(xì)分析了單音信令信號(hào)的檢測(cè)方法和在多種場(chǎng)景下的檢測(cè)性能,并比較了單音信令與傳統(tǒng)無(wú)線信令的檢測(cè)性能。結(jié)果表明,單音信令信號(hào)的強(qiáng)抗干擾、大覆蓋、低開(kāi)銷等特性使其非常適用于復(fù)雜的異構(gòu)無(wú)線通信網(wǎng)小區(qū)間無(wú)線信令傳輸；即使在多發(fā)射機(jī)同時(shí)發(fā)射信號(hào)的情況下,該信令信號(hào)方案仍具有優(yōu)異的檢測(cè)性能。(3)研究了無(wú)線蜂窩通信網(wǎng)絡(luò)中分布式動(dòng)態(tài)小區(qū)間干擾管理問(wèn)題(小區(qū)間數(shù)據(jù)傳輸方案設(shè)計(jì)和優(yōu)化)。基于單音信令信號(hào),本文從物理層實(shí)際出發(fā),研究提出了兩種小區(qū)間數(shù)據(jù)傳輸調(diào)度算法,即開(kāi)關(guān)功率控制算法和小區(qū)間波束協(xié)調(diào)算法。該兩種算法都為分布式算法,不需要中心控制器或中心協(xié)調(diào)器,具有較低的復(fù)雜度；且它們不但能快速減小小區(qū)間干擾從而提高了信道條件差的移動(dòng)終端的性能,而且能極大地改善系統(tǒng)中各移動(dòng)終端的公平性。特別是提出的小區(qū)間波束協(xié)調(diào)算法,在改善系統(tǒng)中移動(dòng)終端之間的公平性的同時(shí),能較好地維持信道條件好的移動(dòng)終端的性能,并提供了不同用戶服務(wù)質(zhì)量的調(diào)節(jié)機(jī)制。通過(guò)網(wǎng)絡(luò)級(jí)蒙特卡洛仿真,本文分析比較了提出的兩種算法與傳統(tǒng)方法的性能,驗(yàn)證了提出算法的有效性、可行性和優(yōu)越性。(4)研究了無(wú)線蜂窩通信網(wǎng)中移動(dòng)性管理——越區(qū)切換管理問(wèn)題,重點(diǎn)分析了越區(qū)切換策略(或切換最初觸發(fā)條件)的選擇問(wèn)題。本文分析了傳統(tǒng)越區(qū)切換策略的不足之處,即切換偏置(handoff bias)不能隨移動(dòng)終端的移動(dòng)狀態(tài)和不同類型基站的環(huán)境參數(shù)的變化而變化；針對(duì)該不足,本文研究提出了一種啟發(fā)式越區(qū)切換策略方案。該方案將移動(dòng)終端的速度大小與方向和各基站的傳輸環(huán)境參數(shù)融合到越區(qū)切換策略中,使越區(qū)切換時(shí)間選擇更加準(zhǔn)確,減小了越區(qū)切換頻率和切換失敗率,從而減小了系統(tǒng)開(kāi)銷和服務(wù)中斷概率。在新興異構(gòu)無(wú)線蜂窩通信網(wǎng)中四種典型的越區(qū)切換場(chǎng)景下,本文利用蒙特卡洛仿真,通過(guò)與傳統(tǒng)方法進(jìn)行比較,驗(yàn)證了提出方法的有效性和優(yōu)越性。
[Abstract]:With the rapid development of mobile Internet and the wide application of intelligent terminals, people have put forward higher requirements for the capacity, delay and coverage of wireless cellular communication networks. In order to improve the performance of wireless cellular communication networks, academia and industry are studying in the traditional wireless macro cellular communication networks to add a lot of small. Power base stations, such as micro cellular base station (picocell base station), micro cellular base station (femtocell base station) and relay station (relay), and so on. Such a heterogeneous emerging wireless network has become a research hotspot in the field of wireless communication. Compared to traditional wireless macro cellular communication network, the base station of new wireless cellular communication network The density of the network is greatly increased and the complexity of the network structure is greatly increased. And because of the very limited frequency resources, the same frequency bands are used in different types of base stations. Therefore, the interference intensity of the same frequency is greatly increased in the network, and the complexity of the interference structure and environment is also greatly increased. The number of base stations detected is increasing, and the coverage of different types of base stations is different and overlaps each other. This makes the handover management of mobile terminals more complex. Therefore, effective interference management and handover management in new wireless cellular communication networks are the key to improve the network performance. It has important theoretical significance and practical value. In this paper, the problems of interference management and handover management in the new wireless cellular communication networks are studied in order to provide some theoretical and technical reference for the wide application of the new wireless cellular communication networks. The main research content, innovation and achievements are as follows: (1) The problem of interference management between different mobile terminals in a cell is discussed. This paper analyzes the limitations of the current interference management schemes based on the signal to leakage plus noise ratio (SLNR) criterion for multiple mobile terminals in a cell and the limitations of the interference management scheme. In this paper, an improved scheme is proposed, which combines the receiver structure in the process of transmitting beam optimization, which makes the description of signal intensity and interference (or leakage) intensity more accurate in the optimization process, so that the designed emitter beamforming matrix can more accurately reduce the same channel between different mobile terminals. In theory, the improved scheme has a more general form, suitable for a variety of receiver structures or receiving filters; from the performance of the system, the improved scheme has a gain of about 2 dB to the equivalent signal interference noise ratio of the mobile terminal in the system, thus increasing the data transmission rate. In the scenario, this paper presents a new model, the layer SLNR model, which takes into account not only the interference between the data streams of different mobile terminals, but also the interference between different data streams from the same mobile terminal (in previous studies, this interference is generally assumed to be zero). And accurately, the optimized precoding vector makes the signal and interference good balance, so that each data stream has better reception quality. (2) the transmission design of wireless signaling information for inter cell interference management is studied. The function of the traditional wireless signaling signal in the wireless bee nest communication network is analyzed and analyzed. A variety of typical traditional wireless signaling detection performance is compared in different scenarios. Traditional wireless signaling signals are designed for service base stations (only for intra cell information transmission), and are extremely vulnerable to interference in wireless channels. Traditional wireless signaling signals are not applicable to emerging wireless signaling. In this paper, a new wireless signaling scheme (monosyllabic signaling scheme) is proposed. It is proved theoretically that the signal has the maximum distance separability and multi signal resolution. The detection performance of signal signal and the detection performance in a variety of scenes, and compared the detection performance of monosyllabic signaling and traditional wireless signaling. The results show that the strong anti-interference, large coverage, low overhead of single tone signaling makes it very suitable for inter cell wireless signaling transmission in complex heterogeneous wireless communication networks; even in many cases. In the case of simultaneous firing of the transmitter, the signaling scheme still has excellent detection performance. (3) the distributed dynamic inter cell interference management problem in the wireless cellular communication network (the design and optimization of the inter cell data transmission scheme) is studied. Based on the monosyllabic signaling, two cells are proposed in this paper from the physical layer. Between the switching power control algorithm and the inter cell beam coordination algorithm, the two algorithms are distributed algorithms, which do not need the central controller or central coordinator, and have low complexity; and they can not only reduce the inter cell interference rapidly, but also improve the performance of the mobile terminal with poor channel condition. It can greatly improve the fairness of each mobile terminal in the system, especially the proposed inter cell beam coordination algorithm, which can improve the performance of the mobile terminal with good channel conditions while improving the fairness between the mobile terminals in the system, and provides a regulation mechanism for the quality of different user services. In this paper, the performance of the proposed two algorithms and traditional methods is analyzed and compared, and the effectiveness, feasibility and superiority of the proposed algorithm are verified. (4) the mobility management in wireless cellular communication networks - handover management problem is studied, and the selection problem of the handover strategy (or the initial trigger condition) is analyzed. The shortcoming of the traditional handover strategy is that the handoff bias can not change with the moving state of the mobile terminal and the change of the environment parameters of the different types of base stations. In this paper, a heuristic handover strategy scheme is proposed in this paper. The scheme is the speed and direction of the mobile terminal and the base of each base. The transmission environment parameters of the station are fused into the handover strategy, which makes the handover time more accurate, reduces the handover frequency and the switching failure rate, thus reduces the system overhead and the service interruption probability. In the four typical handover scenes in the new heterogeneous wireless cellular communication network, this paper uses Monte Carlo simulation, Compared with the traditional methods, the effectiveness and superiority of the proposed method are verified.
【學(xué)位授予單位】：南京理工大學(xué)
【學(xué)位級(jí)別】：博士
【學(xué)位授予年份】：2014
【分類號(hào)】：TN929.5;TN972

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