本文選題：工業(yè)無線傳感器網(wǎng)絡(luò) + MAC協(xié)議�。� 參考：《北京交通大學(xué)》2014年博士論文

【摘要】：隨著通信網(wǎng)絡(luò)及硬件技術(shù)的發(fā)展,具有自組織、擴展靈活等技術(shù)優(yōu)勢的無線傳感器網(wǎng)絡(luò)為工業(yè)系統(tǒng)無線感知和無線控制提供了重要手段。然而,工業(yè)現(xiàn)場用頻設(shè)備復(fù)雜,對無線傳感器網(wǎng)絡(luò)的干擾尤為嚴重,這對面向應(yīng)用的工業(yè)無線傳感器網(wǎng)絡(luò)數(shù)據(jù)可靠實時傳輸提出了新的挑戰(zhàn)。 本文針對工業(yè)無線傳感器網(wǎng)絡(luò)MAC層關(guān)鍵技術(shù)開展研究。主要研究成果和創(chuàng)新點如下： 基于現(xiàn)場工業(yè)環(huán)境,論述了工業(yè)無線傳感器網(wǎng)絡(luò)的系統(tǒng)架構(gòu),并利用現(xiàn)場實驗測試結(jié)果,分析了工業(yè)無線信道對無線信號傳輸?shù)挠绊憽?提出了一種適用于工業(yè)無線傳感器網(wǎng)絡(luò)的信道接入控制協(xié)議IWSN-MAC。無線傳感器網(wǎng)絡(luò)中,基于競爭的CSMA機制和基于調(diào)度的TDMA機制無法滿足工業(yè)實時應(yīng)用需求。本文根據(jù)工業(yè)任務(wù)事件時間約束的不同,提出了一種以劃分正交子載波的方式定義事件優(yōu)先級的方法,并基于事件優(yōu)先級,設(shè)計信道接入控制判決機制。該機制針對工業(yè)應(yīng)用環(huán)境的復(fù)雜性以及用戶設(shè)備競爭信道的隨機行為,由中心控制設(shè)備根據(jù)用戶設(shè)備優(yōu)先級裁定信道接入優(yōu)先級隊列,用戶設(shè)備則根據(jù)判決結(jié)果依次接入信道并傳輸數(shù)據(jù)。論文運用DTMC模型的分析方法,得到數(shù)據(jù)成功傳輸概率、吞吐量和傳輸延時性能指標。分析表明,本協(xié)議作為一種按需接入的且適應(yīng)網(wǎng)絡(luò)動態(tài)變化的MAC協(xié)議,能避免信道沖突產(chǎn)生的不確定時延問題,提供確定的且可預(yù)期的時延性能,尤其適用于突發(fā)緊急事件的工業(yè)應(yīng)用。該方法在信道利用率方面也有明顯優(yōu)勢。 提出了一種工業(yè)無線傳感器網(wǎng)絡(luò)中心控制信道資源分配算法TS-CA。工業(yè)無線傳感器網(wǎng)絡(luò)是無線傳感器網(wǎng)絡(luò)和其它網(wǎng)絡(luò)的混合網(wǎng)絡(luò),由于無線信道資源有限,復(fù)用信道易引發(fā)設(shè)備間的數(shù)據(jù)碰撞問題。本文以抵抗信道干擾為目的,基于人工智能理論,提出了一種通過禁忌搜索的迭代啟發(fā)式思想為網(wǎng)絡(luò)設(shè)備分配信道的方法。本算法針對工業(yè)應(yīng)用環(huán)境的復(fù)雜性,將干擾溫度度量作為信道分配算法的終止條件,避免搜索迭代過程陷入局部最優(yōu)解迂回求解的問題。通過不斷搜索迭代的過程,算法可以為網(wǎng)絡(luò)提供一種全局最優(yōu)的信道分配方案。分析表明,本算法可以有效地避免工業(yè)無線傳感器網(wǎng)絡(luò)中的信道干擾。 提出了一種工業(yè)無線傳感器網(wǎng)絡(luò)自適應(yīng)功率控制算法CRN-PC。本文根據(jù)工業(yè)無線傳感器網(wǎng)絡(luò)的系統(tǒng)特點,基于認知無線網(wǎng)絡(luò)的分析思想,分別對工業(yè)無線傳感器網(wǎng)絡(luò)的主用戶系統(tǒng)和次用戶系統(tǒng)設(shè)計基于干擾溫度的累積干擾模型,并根據(jù)該模型,將工業(yè)無線傳感器網(wǎng)絡(luò)的數(shù)據(jù)傳輸問題建模為干擾約束下的網(wǎng)絡(luò)效用最優(yōu)化問題。論文運用數(shù)學(xué)規(guī)劃理論,得出功率控制問題的求解算法。分析表明,CRN-PC算法的收斂平衡點就是滿足系統(tǒng)期望的數(shù)據(jù)傳輸可靠性指標的最優(yōu)發(fā)射功率,并經(jīng)過凸優(yōu)化理論證明了算法平衡點的全局最優(yōu)性。該算法在用戶設(shè)備的功率資源利用率方面也有明顯優(yōu)勢。
[Abstract]:With the development of communication network and hardware technology, wireless sensor networks, which have the advantages of self organization and flexible expansion, provide an important means for wireless sensing and wireless control of industrial systems. However, the industrial field frequency equipment is complex and the interference to wireless sensor networks is particularly serious. This industrial wireless sensor is applied to the industry. Reliable real-time transmission of network data presents new challenges.
This paper focuses on the key technologies of MAC in industrial wireless sensor networks. The main research results and innovations are as follows:
Based on the field environment, the system architecture of industrial wireless sensor network is discussed, and the effects of industrial wireless channel on the wireless signal transmission are analyzed by using the experimental test results.
In this paper, a channel access control protocol IWSN-MAC. wireless sensor network suitable for industrial wireless sensor networks is proposed. The competitive CSMA mechanism and scheduling based TDMA mechanism can not meet the needs of industrial real-time applications. In this paper, according to the different time constraints of industrial task events, a method of dividing the positive subcarrier is proposed. The method of defining event priority and designing the channel access control decision mechanism based on the event priority. The mechanism aims at the complexity of the industrial application environment and the random behavior of the competitive channel of the user equipment. The central control device adjudication the channel to the priority queue according to the priority of the user equipment, and the user equipment is based on the decision node. The paper uses the analysis method of DTMC model to obtain the successful data transmission probability, throughput and transmission delay performance. The analysis shows that this protocol is a MAC protocol which is connected to the demand and adapts to the dynamic changes of the network. It can avoid the uncertain time delay caused by the channel conflict and provide the determination. The expected delay performance is especially suitable for industrial applications with sudden emergencies. This method also has obvious advantages in channel utilization.
An industrial wireless sensor network central control channel resource allocation algorithm TS-CA. industrial wireless sensor network is a hybrid network of wireless sensor networks and other networks. Due to the limited resources of the wireless channel, the multiplexing channel is easy to trigger the problem of data collision among devices. In the theory of intelligence, a method of channel allocation for network devices is proposed by the iterative heuristic idea of tabu search. This algorithm aims at the complexity of the industrial application environment and uses the interference temperature measure as the terminating condition of the channel allocation algorithm, avoiding the problem of searching the optimal solution of the local optimal solution by the search iteration process. The algorithm can provide a global optimal channel allocation scheme for the network. The analysis shows that this algorithm can effectively avoid channel interference in industrial wireless sensor networks.
An adaptive power control algorithm for industrial wireless sensor network (CRN-PC.) is proposed in this paper. Based on the characteristics of the industrial wireless sensor network, based on the analysis idea of cognitive wireless network, the cumulative interference model based on the interference temperature is designed for the main user system and sub user system of the industrial wireless sensor network. In this model, the data transmission problem of the industrial wireless sensor network is modeled as a network utility optimization problem under the interference constraint. The paper uses the mathematical programming theory to obtain the solution algorithm of the power control problem. The analysis shows that the convergence equilibrium point of the CRN-PC algorithm is the optimal launch of the system expected data transmission reliability index. The global optimality of the algorithm's equilibrium point is proved by convex optimization theory. The algorithm also has obvious advantages in the utilization of power resources of the user equipment.
【學(xué)位授予單位】：北京交通大學(xué)
【學(xué)位級別】：博士
【學(xué)位授予年份】：2014
【分類號】：TN929.5;TP212.9

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相關(guān)博士學(xué)位論文 前1條

1 霍宏偉;醫(yī)療護理無線傳感器網(wǎng)絡(luò)系統(tǒng)關(guān)鍵技術(shù)研究[D];北京交通大學(xué);2010年

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本文編號：1907087