主用戶(hù)移動(dòng)場(chǎng)景下的感知用戶(hù)時(shí)間分配算法
[Abstract]:The traditional cognitive radio technology is mainly aimed at the static cognitive networks of primary and perceptual users. In recent years, the research on user mobility has gradually become a research hotspot. Cognitive network is widely used in multimedia access technology, and the protocols of multimedia access technology are mostly based on time allocation. In this paper, the methods of time allocation for sensing users in mobile environment are studied. Firstly, a time allocation model of primary users in and out of the cognitive radio network is constructed. From the point of view of user mobility, the transmission time available to a single perceived user is given, and the problem of perceptual time threshold is raised, that is, due to the mobility of the primary user, The sensing accuracy of spectrum sensing algorithm will not be improved by the extension of sensing time. Then, in order to give the time parameter design method that can be used in practice, especially for the random walk model, the expression of the optimal transmission time and perceptual time threshold under the condition that the single perceptual user occupies the spectrum is given, especially for the random walk model which is most commonly used in the random model. Simulation experiments are carried out to verify the correctness of the method.
【作者單位】: 哈爾濱工業(yè)大學(xué)電子與信息工程學(xué)院;哈爾濱工業(yè)大學(xué)航天學(xué)院;
【基金】:國(guó)家自然科學(xué)基金資助項(xiàng)目(No.61603115) 中國(guó)博士后科學(xué)基金資助項(xiàng)目(No.2015M81455) 2015年黑龍江省博士后資助經(jīng)費(fèi)(No.LBH-Z15085) 微小型航天器技術(shù)國(guó)防重點(diǎn)學(xué)科實(shí)驗(yàn)室開(kāi)放基金資助項(xiàng)目(No.HIT.KLOF.MST.201501,HIT.KLOF.MST.201601)
【分類(lèi)號(hào)】:TN925
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