本文關(guān)鍵詞：TD-LTE公網(wǎng)集群多媒體業(yè)務(wù)上行資源調(diào)度的研究　出處：《哈爾濱工業(yè)大學(xué)》2015年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： TD-LTE 公網(wǎng)集群 優(yōu)先級 度量矩陣 公平性

【摘要】：集群通信系統(tǒng)是按照動態(tài)信道指配的方式實現(xiàn)多用戶共享信道的無線移動通信系統(tǒng)。近年來,TD-LTE技術(shù)已經(jīng)成為主流技術(shù),基于TD-LTE現(xiàn)有標(biāo)準(zhǔn),設(shè)計TD-LTE集群系統(tǒng)架構(gòu)和資源分配方案是非常有必要的。隨著當(dāng)前移動互聯(lián)網(wǎng)的高速發(fā)展以及全球各城市無線網(wǎng)絡(luò)的大規(guī)模建設(shè),寬帶化成為了整個無線通信的發(fā)展趨勢;與之對應(yīng),集群通信技術(shù)將在某種程度向IP系統(tǒng)、多元化業(yè)務(wù)、寬帶數(shù)據(jù)和多模終端的方向發(fā)展。公網(wǎng)集群系統(tǒng)在交通運輸、能源、電力、金融、物流等行業(yè)均具有一定的應(yīng)用前景,因此LTE公網(wǎng)集群通信的發(fā)展方向是一個必然的發(fā)展方向。TD-LTE是LTE的兩大標(biāo)準(zhǔn)之一,是TD-SCDMA演進(jìn)的結(jié)果,目前TD-LTE公網(wǎng)的覆蓋范圍很廣,建立依托于TD-LTE公網(wǎng)的集群系統(tǒng),可以利用TD-LTE公網(wǎng)所覆蓋的網(wǎng)絡(luò),這樣對于集群業(yè)務(wù)的運營成本和維護(hù)成本都可以做到一定程度上的降低。本文重點對LTE上行鏈路資源調(diào)度算法進(jìn)行了研究,首先分析了上行鏈路和下行鏈路的區(qū)別以及LTE常用的一些資源調(diào)度算法,然后研究了一些可用于上行鏈路的資源分配調(diào)度算法:輪詢啟發(fā)式算法、第一極值擴(kuò)張法、遞歸式啟發(fā)式算法以及包絡(luò)差異值啟發(fā)式算法,并且分別描述了這些算法的具體過程以及優(yōu)缺點,指出了這些算法應(yīng)用于集群網(wǎng)絡(luò)的關(guān)鍵技術(shù)問題。本文明確了在LTE公網(wǎng)集群系統(tǒng)中考慮優(yōu)先級的重要性,并提出了一種可用于LTE公網(wǎng)集群上行鏈路的資源分配算法。這種算法主要在以下三個方面做出改進(jìn):系統(tǒng)中不同的用戶具有不同的優(yōu)先級,這種算法通過改變傳統(tǒng)算法中分配資源時使用的度量矩陣來為具有不同優(yōu)先級的用戶分配資源;使用了一種提升頻譜利用率和吞吐量的方法,通過修剪資源塊的方法來達(dá)到進(jìn)一步提升系統(tǒng)吞吐量和頻譜利用率的目的,并通過吞吐量公式和頻譜利用率公式對其進(jìn)行了分析;使用了一種在信道資源不好的情況下處理資源塊的方法,將自動重傳請求之間的資源塊保留。在本文之前提出的具有優(yōu)先級的算法基礎(chǔ)上,又對這種算法就公平性方面進(jìn)行進(jìn)一步改進(jìn),通過用戶具有的資源塊數(shù)量來改進(jìn)算法的公平性,如果分配的資源塊過多則降低其優(yōu)先級。通過LTE-sim仿真平臺對其進(jìn)行仿真并分析可以得出,增加了優(yōu)先級之后系統(tǒng)的吞吐量和頻譜利用率不但沒有下降而且有所提升,而在此基礎(chǔ)上對算法公平性的改進(jìn)也使其公平性有所增強(qiáng),能夠使公平性指數(shù)更高。
[Abstract]:Trunking communication system refers to the wireless mobile communication system with the shared channel according to the dynamic channel. In recent years, TD-LTE technology has become a mainstream technology, the existing TD-LTE standard based on TD-LTE cluster system design architecture and resource allocation scheme is very necessary. With the rapid development of mobile Internet and large-scale construction city wireless networks around the world, became the development trend of the broadband wireless communication; and the trunking communication technology will be diversified to IP system, in a certain degree of business, broadband data and multi-mode terminal direction. Public cluster system in transportation, energy, electricity, finance, logistics and other industries have a certain application prospect therefore, the development direction of LTE network cluster communication is an inevitable direction of development of.TD-LTE is one of the two major LTE standards, is the evolution of TD-SCDMA The current TD-LTE network coverage is very wide, a cluster system based on TD-LTE network, you can use the TD-LTE network coverage network, such as cluster service operation and the maintenance cost can be reduced to a certain extent. This paper focuses on the LTE uplink resource scheduling algorithm is studied, the paper analyzes the uplink the difference between the LTE and the downlink and some commonly used scheduling algorithm, and then study some resource allocation for uplink scheduling algorithm: polling heuristic algorithm, the first extreme expansion of Zhang Fa, a heuristic algorithm of recursive heuristic algorithm and the difference between the value of the envelope, and describes the specific process of these algorithms and the advantages and disadvantages, points out the key technical problems the algorithm is applied to cluster network. This paper defines in LTE network cluster system into senior high school entrance examination priority. The importance, and proposed a resource allocation algorithm for LTE network cluster uplink. This algorithm is improved in the following three aspects: users of different systems have different priorities, this algorithm to allocate resources for users with different priorities by changing the use of resource allocation in the traditional algorithm when using the metric matrix; a method to improve the spectrum efficiency and throughput, to further improve the system throughput and spectrum utilization by pruning resource blocks, and analyzes the utilization rate through the throughput formula and the formula of frequency spectrum; using a method of processing resource blocks in the channel resource situation is not good and the resource blocks retained between the automatic repeat request. In this paper before with priority algorithm, and the algorithm is fairness For further improvement, the fairness of resource block number through the user has to improve the algorithm, if the resource block allocation too much lower the priority. Through the LTE-sim simulation platform to simulate and analysis can be drawn, then increase the priority system throughput and spectrum utilization rate has not decreased but increased, and on the basis of on the improvement of the fairness algorithm also makes its fairness has been enhanced, enabling the fairness index higher.

【學(xué)位授予單位】：哈爾濱工業(yè)大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TN929.5

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本文編號：1370551