CR網(wǎng)絡(luò)中基于BCR-MAC協(xié)議的頻譜接入策略
發(fā)布時(shí)間：2018-11-06 13:55
【摘要】：現(xiàn)代無(wú)線網(wǎng)絡(luò)應(yīng)用對(duì)高數(shù)據(jù)率的要求引發(fā)了頻譜資源利用方面的探究。為了提高頻譜利用率，有策略提出讓主用戶和次用戶共享資源。認(rèn)知無(wú)線電被認(rèn)為是提高頻譜利用率的一種潛在的解決方案，由于其在無(wú)線網(wǎng)絡(luò)中考慮了動(dòng)態(tài)頻譜接入。為了有效部署認(rèn)知無(wú)線電網(wǎng)絡(luò)，MAC層實(shí)行了協(xié)作通信。 CR網(wǎng)絡(luò)頻譜分配的一個(gè)主要問(wèn)題是怎樣接入頻譜并能保留次級(jí)用戶鏈路。本文的目的是基于BCR-MAC協(xié)議對(duì)這種技術(shù)提出不同的MAC替代方案。此方案易于識(shí)別檢測(cè)錯(cuò)誤，例如漏檢和錯(cuò)檢。 本文采用備份信道預(yù)約機(jī)制的MAC協(xié)議來(lái)用處理等待的次級(jí)用戶鏈路從而避免了其與主用戶的沖突。最近關(guān)于BCR協(xié)議的概念是根據(jù)包括占有率，信道現(xiàn)狀，剩余空閑時(shí)間和釋放時(shí)間等標(biāo)準(zhǔn)來(lái)選擇信道。這種方案提供了有效的次級(jí)用戶鏈路支持，同時(shí)也減少了對(duì)主次用戶的干擾。 由MATLAB和NS得到的仿真結(jié)果驗(yàn)證了BCR-MAC協(xié)議的魯棒性。
[Abstract]:The demand for high data rate in modern wireless network applications leads to the exploration of spectrum resource utilization. In order to improve spectrum efficiency, a strategy is proposed to share resources between primary and secondary users. Cognitive radio is considered as a potential solution to improve spectrum efficiency because it considers dynamic spectrum access in wireless networks. In order to deploy cognitive radio networks effectively, the MAC layer implements cooperative communication. One of the main problems of spectrum allocation in CR networks is how to access the spectrum and retain secondary user links. The purpose of this paper is to propose different MAC alternatives to this technique based on BCR-MAC protocol. This scheme is easy to identify and detect errors, such as miss and error detection. In this paper, the MAC protocol of backup channel reservation mechanism is used to deal with the waiting secondary user link so as to avoid the conflict between the secondary user and the primary user. Recently, the concept of BCR protocol is to select the channel according to the criteria including occupancy rate, channel status, remaining idle time and release time. This scheme provides effective secondary user link support and reduces interference to primary and secondary users. The simulation results obtained from MATLAB and NS verify the robustness of BCR-MAC protocol.
【學(xué)位授予單位】：華中科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：TN925
本文編號(hào)：2314474
[Abstract]:The demand for high data rate in modern wireless network applications leads to the exploration of spectrum resource utilization. In order to improve spectrum efficiency, a strategy is proposed to share resources between primary and secondary users. Cognitive radio is considered as a potential solution to improve spectrum efficiency because it considers dynamic spectrum access in wireless networks. In order to deploy cognitive radio networks effectively, the MAC layer implements cooperative communication. One of the main problems of spectrum allocation in CR networks is how to access the spectrum and retain secondary user links. The purpose of this paper is to propose different MAC alternatives to this technique based on BCR-MAC protocol. This scheme is easy to identify and detect errors, such as miss and error detection. In this paper, the MAC protocol of backup channel reservation mechanism is used to deal with the waiting secondary user link so as to avoid the conflict between the secondary user and the primary user. Recently, the concept of BCR protocol is to select the channel according to the criteria including occupancy rate, channel status, remaining idle time and release time. This scheme provides effective secondary user link support and reduces interference to primary and secondary users. The simulation results obtained from MATLAB and NS verify the robustness of BCR-MAC protocol.
【學(xué)位授予單位】：華中科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：TN925
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相關(guān)碩士學(xué)位論文 前1條
1 胡瑞佑;CR網(wǎng)絡(luò)中基于BCR-MAC協(xié)議的頻譜接入策略[D];華中科技大學(xué);2014年
，本文編號(hào)：2314474
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