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基于WIA-PA傳感器網(wǎng)絡(luò )的能量有效時(shí)間同步算法
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(1.江蘇信息職業(yè)技術(shù)學(xué)院, 江蘇 無(wú)錫 214000;2.電子科技大學(xué) 通信抗干擾技術(shù)國家級重點(diǎn)實(shí)驗室, 四川 成都 611731)

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季云峰(1978-),男,江蘇無(wú)錫人,碩士,講師,主要從事無(wú)線(xiàn)傳感器網(wǎng)絡(luò )等方向的研究。 [FQ)]

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An Energy-Efficient Algorithm for Time Synchronization Based on WIA-PA Sensor Networds
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(1.Jiangsu College of Information Technology, Wuxi 214000, China;2.University of Electronic Science and Technology, Chengdu 611731,China)[JZ)]

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    摘要:

    WIA-PA協(xié)議是一種新型工業(yè)級無(wú)線(xiàn)傳感器網(wǎng)絡(luò )國際標準;當WIA-PA網(wǎng)絡(luò )內節點(diǎn)數目增多時(shí),傳統的參考廣播同步算法RBS以及改進(jìn)型ERBS算法網(wǎng)絡(luò )開(kāi)銷(xiāo)非常大;針對這一嚴峻的問(wèn)題,提出了一種能量有效的局部最優(yōu)時(shí)間同步算法;該算法對相鄰的接收節點(diǎn)在多個(gè)參考廣播消息的條件下求取平均相位偏差,然后對此平均相位偏差進(jìn)行最大后驗估計,最后根據此估計值調整本地時(shí)鐘;仿真結果表明,所提時(shí)間同步算法在同步精度方面比RBS約提高168%,比ERBS約提高24%;同時(shí),同步過(guò)程中的網(wǎng)絡(luò )能耗也大大減少。

    Abstract:

    WIA-PA protocol is a new type of international communication standards for industrial wireless sensor networks. With the incensement of the number of the sensor nodes in the WIA-PA network, the overhead and the energy consumption of the whole network appear to be very large based on the traditional reference broadcast synchronization algorithm RBS and its modified version algorithm ERBS. In order to solve this serious problem, this paper puts forward a kind of energy efficient local optimal algorithm for the time synchronization process. The algorithm solves out the average phase deviation according to the adjacent receiving node under the condition of multiple reference broadcast messages, and then carries out maximum posteriori estimation for this calculated phase deviation, and finally adjusts the local clock according to the estimate. The simulation results show that the synchronous accuracy of the proposed time synchronization algorithm is about 168% higher than that of RBS and is about 24% higher than that of ERBS. At the same time, the energy consumption in the process of time synchronization is also greatly reduced。

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季云峰,馬上.基于WIA-PA傳感器網(wǎng)絡(luò )的能量有效時(shí)間同步算法計算機測量與控制[J].,2015,23(5):1646-1648, 1656.

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  • 在線(xiàn)發(fā)布日期: 2015-07-31
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