本文選題：接納控制 + 資源分配　； 參考：《電子科技大學(xué)》2014年碩士論文

【摘要】：無線局域網(wǎng)已經(jīng)成為無線寬帶通信的重要組成部分,無線局域網(wǎng)技術(shù)可以顯著的增加接入帶寬,并且減少布網(wǎng)成本,同時提高接入的靈活性。無線局域網(wǎng)技術(shù)能使用戶通過無線實現(xiàn)高速率、低資費的上網(wǎng),已經(jīng)顯示出了強大的生命力和應(yīng)用前景,成為了最具商業(yè)前景的通信技術(shù)之一。在下一代超高速無線局域網(wǎng)中,不同帶寬接入能力的終端,不同QoS需求的業(yè)務(wù)并存,使得接納控制問題顯得尤為突出,通過合適的接納控制算法可以限制呼叫的接入和動態(tài)的分配帶寬來實現(xiàn)高的信道利用率和減少系統(tǒng)的整體阻塞概率和掉線率。本文依托于國家高技術(shù)發(fā)展計劃(863)重大專項——超高速無線局域網(wǎng)無線接口關(guān)鍵技術(shù)研究與驗證,實現(xiàn)了NUHT系統(tǒng)的大部分協(xié)議,包括業(yè)務(wù)流的連接管理,資源分配,帶寬申請,ARQ,MAC服務(wù)數(shù)據(jù)單元的分片和聚合等功能,并且完善了Pipeline機制對于無線通信信道的性能仿真。本文針對下一代超高速無線局域網(wǎng)多帶寬接入能力、多業(yè)務(wù)并發(fā)執(zhí)行的場景,提出了以提高信道利用率為目標,兼顧切換業(yè)務(wù),QoS優(yōu)先級因素下,盡可能實現(xiàn)同類業(yè)務(wù)公平性的接納控制算法FDBR(Fairly dynamic bandwidth release),并對該算法進行了理論上的分析,在下一代超高速無線局域網(wǎng)的仿真平臺上進行了仿真,并進行了性能對比。承接接納控制算法,對接納控制后的資源進行細分配,基于信道利用率的最優(yōu)化算法,提出了一種二級分配機制,先以用戶為粒度對按用戶優(yōu)先級進行了一級分配,再對用戶得到的資源按業(yè)務(wù)流進行再分配,最后統(tǒng)一分配BE業(yè)務(wù)。最后基于OPNET的仿真平臺下進行系統(tǒng)級的仿真,并同現(xiàn)有算法進行了對比,驗證針對現(xiàn)有環(huán)境下,所提出的接納算法在業(yè)務(wù)量不斷增加的情形下,新業(yè)務(wù)的阻塞概率和切換業(yè)務(wù)丟失概率的比現(xiàn)有的一些接納控制算法有比較明顯的下降,資源分配算法在隨著80M用戶的比例的增多,信道的利用率趨于增高。
[Abstract]:Wireless local area network (WLAN) has become an important part of wireless broadband communication. WLAN technology can significantly increase access bandwidth, reduce the cost of network distribution, and improve access flexibility. Wireless local area network (WLAN) technology enables users to access the Internet with high speed and low tariff through wireless, which has shown strong vitality and application prospect, and has become one of the most promising communication technologies. In the next generation ultra-high speed wireless local area network, different bandwidth access capabilities of terminals and different QoS requirements coexist, which makes the admission control problem particularly prominent. Access to calls and dynamic bandwidth allocation can be restricted by appropriate admission control algorithms to achieve high channel utilization and reduce the overall blocking probability and drop rate of the system. Based on the research and verification of the key technology of ultra-high speed wireless local area network (WLAN), which is a major project of the National High Technology Development Program (863), this paper realizes most of the protocols of the NUHT system, including connection management of traffic flow, resource allocation, etc. The partition and aggregation functions of ARQO MAC service data unit are presented, and the performance simulation of wireless communication channel based on Pipeline mechanism is improved. Aiming at the scenario of multi-bandwidth access and concurrent execution of multi-service in the next generation ultra-high speed wireless local area network, this paper proposes a new method to improve channel utilization and to take into account the QoS priority factor of handoff services. The admission control algorithm (FDBR(Fairly dynamic bandwidth release), which realizes the fairness of similar services as much as possible, is analyzed theoretically and simulated on the next generation ultra-high speed WLAN simulation platform, and the performance is compared. Taking the admission control algorithm, the resources after admission control are subdivided and allocated. Based on the optimal channel utilization algorithm, a two-level allocation mechanism is proposed. First, the user granularity is used to allocate the resources according to the priority of the user. The resources obtained by the user are redistributed according to the service flow, and finally the be services are uniformly allocated. Finally, the system-level simulation based on OPNET is carried out, and compared with the existing algorithms, it is verified that the proposed admission algorithm is in the case of increasing traffic under the existing environment. The blocking probability and handoff loss probability of the new traffic are significantly lower than those of some existing admission control algorithms. With the increase of the proportion of 80m users, the channel utilization rate tends to increase.
【學(xué)位授予單位】：電子科技大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TN925.93

【參考文獻】

相關(guān)期刊論文 前1條

1 馬小強;張春業(yè);張波;;基于IEEE 802.16的接納控制機制[J];計算機工程;2010年10期

相關(guān)碩士學(xué)位論文 前2條

1 黃鑫;IEEE 802.16系統(tǒng)接納控制機制研究[D];西安電子科技大學(xué);2008年

2 王小成;基于博弈論的認知無線電網(wǎng)絡(luò)頻譜資源共享研究[D];燕山大學(xué);2013年

，

本文編號：1904113