本文選題：移動(dòng)通信　切入點(diǎn)：直連通信　出處：《北京郵電大學(xué)》2015年碩士論文　論文類(lèi)型：學(xué)位論文

【摘要】：近些年來(lái),隨著智能終端數(shù)量的急劇增長(zhǎng),各種新的應(yīng)用程序不斷出現(xiàn),導(dǎo)致移動(dòng)數(shù)據(jù)流量,尤其是移動(dòng)視頻業(yè)務(wù)量大幅提升。同時(shí),移動(dòng)通信對(duì)于數(shù)據(jù)傳輸速率的要求也越來(lái)越高。未來(lái)的蜂窩網(wǎng)絡(luò)中,高質(zhì)量的語(yǔ)音業(yè)務(wù)已不能滿(mǎn)足用戶(hù)的需求,系統(tǒng)必須能夠提供大量的數(shù)據(jù)傳輸服務(wù)。因而,有必要顯著提升系統(tǒng)容量和實(shí)現(xiàn)高數(shù)據(jù)速率覆蓋。傳統(tǒng)的蜂窩網(wǎng)絡(luò)架構(gòu)已不能滿(mǎn)足這樣的要求,研究人員引入了許多先進(jìn)技術(shù)進(jìn)行網(wǎng)絡(luò)性能的改善,直連通信(Device-to-Device, D2D)就是其中之一。 然而,D2D通信可能在實(shí)際中因?yàn)檫h(yuǎn)距離、傳播介質(zhì)、蜂窩干擾等因素而受到嚴(yán)重限制。因此,提出多跳D2D通信的概念來(lái)擴(kuò)展D2D系統(tǒng)的通信能力。多跳通信中恰當(dāng)?shù)穆酚伤惴〞?huì)對(duì)系統(tǒng)性能產(chǎn)生重要影響,特別是能量有效性能。信道復(fù)用和功率分配對(duì)提高多跳D2D通信系統(tǒng)的能量有效性起到關(guān)鍵作用,但已有的路由算法較少同時(shí)考慮這兩個(gè)因素。此外,D2D系統(tǒng)中干擾管理的相關(guān)機(jī)制已經(jīng)很多,且各有所長(zhǎng),有必要對(duì)它們進(jìn)行系統(tǒng)的總結(jié)和仿真分析,得出合理的性能對(duì)比。 因此,本論文主要工作如下： 1.通過(guò)聯(lián)合優(yōu)化信道復(fù)用和功率分配,提出了一種新型的蜂窩與D2D混合網(wǎng)絡(luò)中能量有效的多跳D2D路由算法。首先,將能量有效的多跳路由問(wèn)題建模為一個(gè)組合優(yōu)化問(wèn)題；其次,為了獲得一個(gè)運(yùn)算量可行的解,并且得到滿(mǎn)意的能量有效性能,提出了一個(gè)啟發(fā)式多跳D2D路由算法；最后,仿真結(jié)果分析表明,本文所提出的路由算法與其他已有的相關(guān)算法相比,在不同的場(chǎng)景下均具有較好的能量有效性。 2.在D2D通信中引入部分頻率復(fù)用(Fractional Frequency Reuse,FFR)進(jìn)行干擾管理,可以有效的提升系統(tǒng)吞吐量和中斷概率。本文系統(tǒng)的總結(jié)了在蜂窩與D2D混合網(wǎng)絡(luò)中FFR技術(shù)的典型應(yīng)用,對(duì)FFR動(dòng)態(tài)頻譜分配方案和FFR最優(yōu)閾值方案做了較詳細(xì)的分析比較,并將上述兩種方案在不同場(chǎng)景中進(jìn)行了仿真和討論。
[Abstract]:In recent years, with the rapid growth of the number of intelligent terminals, various new applications are emerging, resulting in a significant increase in mobile data traffic, especially mobile video traffic. In future cellular networks, high quality voice services can no longer meet the needs of users, and the system must be able to provide a large number of data transmission services. It is necessary to significantly increase system capacity and achieve high data rate coverage. Traditional cellular network architectures can no longer meet such requirements, and researchers have introduced many advanced technologies to improve network performance. Direct communication device-to-device (D-2 D) is one of them. However, D2D communication may be severely restricted in practice because of such factors as distance, propagation medium, cellular interference, etc. The concept of multi-hop D2D communication is proposed to extend the communication capability of D2D system. The proper routing algorithm in multi-hop communication will have an important impact on the performance of the system. In particular, energy efficiency, channel multiplexing and power allocation play a key role in improving the energy efficiency of multi-hop D2D communication systems. However, the existing routing algorithms seldom consider these two factors at the same time. In addition, there are many relevant mechanisms of interference management in D2D systems, and each has its own strong points. It is necessary to summarize and simulate them, and get a reasonable performance comparison. Therefore, the main work of this paper is as follows:. 1. By jointly optimizing channel multiplexing and power allocation, a novel energy-efficient multi-hop D2D routing algorithm in cellular and D2D hybrid networks is proposed. Firstly, the energy-efficient multi-hop routing problem is modeled as a combinatorial optimization problem. A heuristic multi-hop D2D routing algorithm is proposed in order to obtain a feasible solution with computational complexity and satisfactory energy efficiency. Finally, the simulation results show that, Compared with other existing algorithms, the proposed routing algorithm has better energy efficiency in different scenarios. 2. In D2D communication, using Fractional Frequency reuse FFR) in D2D communication can effectively improve system throughput and interrupt probability. In this paper, the typical applications of FFR technology in cellular and D2D hybrid networks are summarized. The dynamic spectrum allocation scheme of FFR and the optimal threshold scheme of FFR are analyzed and compared in detail, and the two schemes are simulated and discussed in different scenarios.
【學(xué)位授予單位】：北京郵電大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類(lèi)號(hào)】：TN929.5

【共引文獻(xiàn)】

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