發(fā)布時間：2018-06-29 01:16

  本文選題：可充電無線傳感器網絡 + 無線能量傳輸��； 參考：《合肥工業(yè)大學》2015年博士論文

【摘要】：無線傳感器網絡興起和發(fā)展成為數(shù)字信息世界和物理真實世界的紐帶,為信號與信息處理方向的研究帶來了新的機遇,同時,無線傳感器網絡的研究也面臨著前所未有的挑戰(zhàn)。無線傳感器網絡能量相關問題始終是該領域研究的熱點問題。無線傳感器節(jié)點能源受限一直是阻礙無線傳感器網絡長期工作的瓶頸。已有學者在無線傳感器網絡的數(shù)據(jù)路由、MAC協(xié)議、能量控制、跨層優(yōu)化及外部能量獲取領域進行研究。近年來,新興的無線能量傳輸技術為無線傳感器節(jié)點能量補給帶來了曙光。對無線傳感器節(jié)點進行遠距離無線能量補給,可有效地解決無線傳感器節(jié)點能源受限的問題,然而國內外對引入無線能量傳輸設備后的無線傳感器網絡的研究才剛起步。本文利用最優(yōu)化方法,通過深入分析引入無線能量補給設備的無線傳感器網絡模型,提出一系列優(yōu)化問題并求解,得到不同網絡結構下的無線能量補給設備和無線傳感網絡的工作策略。本文的研究成果如下：(1)提出單基站可充電無線傳感器網絡靜態(tài)拓撲下的動態(tài)模型。該動態(tài)模型反映無線傳感器節(jié)點和無線能量補給設備在不同時刻需要滿足的約束條件。無線能量補給設備通過遍歷網絡內所有傳感器節(jié)點進行能量補給,使其不會因為放電過度而失效。為盡可能減少無線能量補給設備的工作時間而更長地駐留在維護站,提出了動態(tài)網絡模型下的優(yōu)化問題,并通過推導和證明將其轉化為具有等優(yōu)性的線性規(guī)劃問題。求解該優(yōu)化問題后,得到無線能量補給設備的最佳遍歷路徑、充電時長和無線傳感器網絡的動態(tài)數(shù)據(jù)路由策略。(2)提出單基站可充電無線傳感器網絡動態(tài)拓撲下的動態(tài)模型。在該模型中,無線能量補給設備在遍歷無線傳感器網絡中不同節(jié)點時,也擔任數(shù)據(jù)收集任務,從節(jié)點處接收數(shù)據(jù)。而被充電的節(jié)點作為簇頭節(jié)點從簇內其他節(jié)點處接收信息,并直接傳輸給無線能量補給設備。由于無線能量補給設備需要遍歷網絡中所有傳感器節(jié)點,那么擔任簇頭的傳感器節(jié)點和簇的劃分不是固定不變的。與靜態(tài)拓撲模式下的模型不同,需要研究不同時刻不同傳感器節(jié)點需要滿足的約束條件,并提出相應的優(yōu)化問題。通過求解該優(yōu)化問題,得到單基站可充電無線傳感器網絡動態(tài)拓撲模式下節(jié)點動態(tài)分簇策略、網絡數(shù)據(jù)路由策略及無線能量補給設備的工作策略。(3)提出多基站可充電無線傳感器網絡動態(tài)模型。在較為廣闊的區(qū)域內布設多個基站,可有效地減少無線傳感器網絡中數(shù)據(jù)傳輸?shù)木嚯x和跳數(shù),從而降低無線傳感器節(jié)點的能耗。通過分析之前兩個研究成果,提出無線傳感器節(jié)點活躍度的概念,建立多基站可充電無線傳感器網絡動態(tài)模型并提出相應優(yōu)化問題。通過求解該優(yōu)化問題,得到在最大化網絡中傳感器節(jié)點活躍度目標下的數(shù)據(jù)路由、通信功率控制及無線能量補給設備動態(tài)且周期的工作策略。
[Abstract]:The rise and development of wireless sensor network has become the link between the digital information world and the physical real world. It has brought new opportunities for the research of the direction of signal and information processing. At the same time, the research of wireless sensor networks is facing unprecedented challenges. The problem of the capacity of wireless sensor networks has always been a hot topic in this field. The energy limitation of wireless sensor nodes has been a bottleneck to the long-term work of wireless sensor networks. Some scholars have studied the data routing, MAC protocol, energy control, cross layer optimization and external energy acquisition in wireless sensor networks. In recent years, new wireless energy transmission technology has been used for wireless sensor node energy supplement. The long distance wireless energy supply to wireless sensor nodes can effectively solve the problem of energy limitation for wireless sensor nodes. However, the research on wireless sensor networks after the introduction of wireless energy transmission equipment at home and abroad is just starting. This paper uses the most optimized method to introduce wireless energy through in-depth analysis. A series of optimization problems and solutions are proposed for the wireless sensor network model of recharge equipment. The work strategy of wireless energy supply equipment and wireless sensor networks under different network structures is obtained. The results of this paper are as follows: (1) the dynamic model of the single base station Rechargeable Wireless sensor network topology is proposed. The wireless sensor nodes and the wireless energy supply equipment need to meet the constraints at different times. The wireless energy supply equipment can supply energy by traversing all the sensor nodes in the network, so that it will not be invalid because of excessive discharge. The maintenance station, the optimization problem under the dynamic network model is proposed, and it is transformed into a linear programming problem with equal optimality by derivation and proof. After solving the optimization problem, the optimal ergodicity path of the wireless energy supply equipment, the long charge time and the dynamic data routing strategy of the wireless sensor network are obtained. (2) the single base station can be recharged. In the dynamic topology of an electric wireless sensor network, a wireless energy supply device also acts as a data collection task to receive data from a node when it traverses the different nodes in the wireless sensor network. The charged node receives information as a cluster head node from his node in the cluster and transfers it directly to the wireless network. Because the wireless energy supply equipment needs to traverse all the sensor nodes in the network, the partition of the sensor nodes and clusters of the cluster heads is not fixed. Different from the static topology model, the constraints that the sensor nodes need to meet at different time should be studied and the corresponding advantages are proposed. By solving the optimization problem, the dynamic clustering strategy of nodes, network data routing strategy and the work strategy of wireless energy supply equipment in the dynamic topology mode of the single base station Rechargeable Wireless sensor network are solved. (3) the dynamic model of the multibase station Rechargeable Wireless Sensor Network is proposed. Stations can effectively reduce the distance and hops of data transmission in wireless sensor networks and reduce the energy consumption of wireless sensor nodes. By analyzing the previous two research results, the concept of the activity of wireless sensor nodes is proposed, and the dynamic model of the multibase station Rechargeable Wireless Sensor Network is established and the corresponding optimization problems are put forward. In order to solve the optimization problem, the data routing, communication power control and the dynamic and periodic work strategy of the power control and the wireless energy supply equipment are obtained in the maximum network.
【學位授予單位】：合肥工業(yè)大學
【學位級別】：博士
【學位授予年份】：2015
【分類號】：TP212.9;TN929.5

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