本文選題：流量卸載　切入點：合作下載　出處：《南京郵電大學(xué)》2017年碩士論文

【摘要】：隨著智能終端設(shè)備的不斷增加以及通信技術(shù)的不斷升級,蜂窩數(shù)據(jù)呈現(xiàn)爆炸式的增長。造成蜂窩壓力的原因之一是同樣數(shù)據(jù)的多次重復(fù)下載,通過合作下載數(shù)據(jù)的方式可以減少數(shù)據(jù)下載的次數(shù)�；贒2D的流量卸載技術(shù)能夠減輕蜂窩壓力,提高用戶數(shù)據(jù)接入體驗,因此成為當(dāng)前的熱點研究領(lǐng)域。因此本文研究基于D2D的合作下載的流量卸載方案。然而現(xiàn)有的合作下載方案尚存在如下問題:第一,在合作數(shù)據(jù)分發(fā)的過程中并未將能量效率考慮進去;第二,在下載階段已存在一些激勵機制,但尚未有融進合作下載方案中的激勵機制。論文的貢獻在于以下三點:1、通過分組的方式進行合作數(shù)據(jù)下載,由組頭從蜂窩網(wǎng)絡(luò)下載數(shù)據(jù),然后在組內(nèi)分發(fā)數(shù)據(jù)。已有方案采用星狀數(shù)據(jù)傳輸方式,但其在下載時間與系統(tǒng)吞吐量等方面的性能不足,故而提出組內(nèi)鏈式傳輸方式。同時,相應(yīng)的修改數(shù)據(jù)下載過程中的能量消耗表達式。最后,通過仿真實驗證明該方案有效的提高能量效率,并提供更快的下載時間與更高的系統(tǒng)吞吐量。2、現(xiàn)有的激勵方案不能很好的融合激勵用戶參與流量卸載過程與用戶轉(zhuǎn)發(fā)數(shù)據(jù)兩方面。本文提出融合這兩方面的集成的激勵機制,并應(yīng)用到合作數(shù)據(jù)下載方案中。其中通過反向拍賣方案激勵用戶參與流量卸載過程中,通過獎勵計費函數(shù)激勵用戶轉(zhuǎn)發(fā)數(shù)據(jù)。最后通過分析在流量卸載過程中,各個參與者的即得利益表明方案的可行性。3、在反向拍賣過程中,運營商需要知道參加拍賣用戶的卸載潛力。本文針對D2D網(wǎng)絡(luò)和Wi-Fi網(wǎng)絡(luò)兩種場景提出不同的預(yù)測模型,并將預(yù)測模型與仿真得出的實際值進行對比。由此,根據(jù)不同的預(yù)測模型可得出用戶的卸載潛力。
[Abstract]:With the increasing number of smart terminal devices and the continuous upgrading of communications technology, cellular data is exploding. One of the reasons for cellular pressure is repeated downloads of the same data. It can reduce the number of data downloads by co-downloading data. D2D based traffic unloading technology can reduce cellular pressure and improve the user's data access experience. Therefore, this paper studies the traffic unload scheme based on D2D collaborative download. However, the existing cooperative download scheme still has the following problems: first, Energy efficiency is not taken into account in the collaborative data distribution process; second, there are some incentives already in place during the download phase. However, there is no incentive mechanism in the cooperative download scheme. The contribution of this paper lies in the following three points: 1: 1. Download the cooperative data by grouping, and download the data from the cellular network by the group head. Then the data is distributed in the group. The existing scheme uses star data transmission mode, but its performance in download time and system throughput is insufficient, so the intra-group chain transmission mode is proposed. At the same time, The expression of energy consumption in the process of data downloading is modified accordingly. Finally, the simulation results show that the proposed scheme can effectively improve the energy efficiency. It also provides faster download time and higher system throughput. The existing incentive schemes can not well combine the two aspects of encouraging users to participate in the flow unload process and the user forwarding data. This paper proposes an integrated incentive mechanism combining these two aspects. It is applied to the cooperative data download scheme. The reverse auction scheme is used to encourage users to participate in the process of traffic unloading, and the reward billing function is used to motivate the user to forward the data. Finally, through the analysis of the process of traffic unloading, The pay-as-you-go benefits of each participant indicate the feasibility of the scheme. 3. In the reverse auction process, operators need to know the unloading potential of users participating in the auction. In this paper, different prediction models are proposed for two scenarios: D2D network and Wi-Fi network. By comparing the prediction model with the actual value obtained by simulation, the unloading potential of the user can be obtained according to different prediction models.
【學(xué)位授予單位】：南京郵電大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TN929.5

【參考文獻】

相關(guān)期刊論文 前1條

1 焦巖;高月紅;楊鴻文;楊大成;;D2D技術(shù)研究現(xiàn)狀及發(fā)展前景[J];電信工程技術(shù)與標準化;2014年06期

，

本文編號：1683572