【摘要】：隨著提升行車安全的需求越來(lái)越迫切和無(wú)線通信技術(shù)的發(fā)展,車聯(lián)網(wǎng)技術(shù)吸引了越來(lái)越多的關(guān)注和研究。車聯(lián)網(wǎng)的主要目的是通過(guò)車與車、車與路邊設(shè)施的通信,傳輸行車安全相關(guān)的信息和接入互聯(lián)網(wǎng)的數(shù)據(jù)包,為駕駛員提供安全舒適的行車體驗(yàn)。 車聯(lián)網(wǎng)通信中由于傳輸行車安全相關(guān)的信息,因此對(duì)用戶服務(wù)質(zhì)量(Quality of Service, QoS)和通信的可靠性要求十分嚴(yán)苛。而在車聯(lián)網(wǎng)通信QoS和可靠性的研究中,需要解決嚴(yán)苛端到端時(shí)延需求和頻譜資源瓶頸兩大難題。圍繞這兩個(gè)問(wèn)題,本文分別對(duì)車聯(lián)網(wǎng)控制信道的接入問(wèn)題和認(rèn)知合作車聯(lián)網(wǎng)的性能優(yōu)化問(wèn)題進(jìn)行了探討和研究。同時(shí)這也是作者在碩士期間參與項(xiàng)目的研究成果,包括：北京市教委項(xiàng)目(基于認(rèn)知無(wú)線電的公交車聯(lián)網(wǎng)應(yīng)用技術(shù)開(kāi)發(fā)),北京郵電大學(xué)優(yōu)秀研究生創(chuàng)新基金項(xiàng)目。具研究?jī)?nèi)容如下： 1.首先針對(duì)分布式競(jìng)爭(zhēng)中控制信道接入時(shí)延無(wú)法保證的問(wèn)題,研究了車聯(lián)網(wǎng)中控制信道的接入機(jī)制�？紤]到車聯(lián)網(wǎng)多信道操作中時(shí)隙交替對(duì)接入時(shí)延的影響,論文巧妙地利用剩余有效時(shí)延控制接入競(jìng)爭(zhēng),提出了時(shí)延敏感的控制信道接入機(jī)制,并通過(guò)仿真表明所提算法可以在保證接入成功率的基礎(chǔ)上有效提高接入時(shí)延的性能。 2.針對(duì)車聯(lián)網(wǎng)頻譜資源緊缺的現(xiàn)狀,本文通過(guò)研究認(rèn)知合作車聯(lián)網(wǎng)來(lái)擴(kuò)展車聯(lián)網(wǎng)可用頻譜資源并提高頻譜效率。在認(rèn)知合作車聯(lián)網(wǎng)中,合作鏈路的性能與合作中繼的選擇密切相關(guān)。因此,本文首先在單鏈路場(chǎng)景中,通過(guò)求解最大能量效率的優(yōu)化問(wèn)題,提出了高能效的中繼的選擇方案；其次在多鏈路場(chǎng)景中,通過(guò)分析多鏈路場(chǎng)景下的干擾限制條件,提出基于最優(yōu)化網(wǎng)絡(luò)吞吐量的中繼選擇方案。仿真結(jié)果表明,所提的兩種中繼選擇方案分別可以有效提高單鏈路下的能量效率和多鏈路下的網(wǎng)絡(luò)吞吐量。
[Abstract]:With the development of wireless communication technology and the urgent need to improve vehicle safety, vehicle networking technology has attracted more and more attention and research. The main purpose of vehicle networking is to communicate with vehicles, vehicles and roadside facilities, to transmit information related to driving safety and data packets connected to the Internet, and to provide drivers with a safe and comfortable driving experience. Due to the transmission of information related to vehicle safety, the quality of service (Quality of Service, QoS) and the reliability of communication are very strict. In the research of QoS and reliability of vehicle network communication, it is necessary to solve the demanding end-to-end delay requirements and the bottleneck of spectrum resources. According to these two problems, the access problem of the control channel and the performance optimization of the cognitive cooperative vehicle network are discussed and studied in this paper. At the same time, this is the research result of the author's participation in the project during his master's period, including: Beijing Education Commission Project (bus networking Application Technology Development based on Cognitive Radio), Beijing University of posts and Telecommunications excellent Graduate Innovation Fund project. The research contents are as follows: 1. Firstly, aiming at the problem that control channel access delay can not be guaranteed in distributed competition, the access mechanism of control channel in vehicle network is studied. Considering the influence of time slot alternation on the access delay in the multi-channel operation of vehicle networking, this paper skillfully uses the remaining effective delay to control the access competition, and proposes a time-sensitive control channel access mechanism. The simulation results show that the proposed algorithm can effectively improve the performance of access delay on the basis of ensuring the success rate of access. 2. In view of the shortage of spectrum resources in vehicle networking, this paper studies the cognitive cooperative vehicle network to expand the available spectrum resources and improve the spectrum efficiency. In cognitive cooperative vehicle networking, the performance of cooperative links is closely related to the selection of cooperative relays. Therefore, in the single link scenario, by solving the optimization problem of maximum energy efficiency, this paper proposes a high energy efficiency relay selection scheme. Secondly, in the multi-link scenario, by analyzing the interference limitation conditions in the multi-link scenario, a relay selection scheme based on optimal network throughput is proposed. Simulation results show that the proposed two relay selection schemes can effectively improve the energy efficiency and network throughput under single link and multi-link respectively.
【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
【分類號(hào)】：U495;U463.67

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本文編號(hào)：2337372