本文關(guān)鍵詞：桃園中無線傳感網(wǎng)絡(luò)通信協(xié)議改進(jìn)設(shè)計(jì)，由筆耕文化傳播整理發(fā)布。

桃園中無線傳感網(wǎng)絡(luò)通信協(xié)議改進(jìn)設(shè)計(jì)

Design and Improvement of the Communication Protocol for Wireless Sensor Networks in Peach Garden

[1] [2] [3] [4] [5] [6]

Lu Chen, Qu Wentai, Yang Xianglong, Wang Chunlong, Cao Hong, Jia Shengyao （1. College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou 310058, China

[1]浙江大學(xué)生物系統(tǒng)工程與食品科學(xué)學(xué)院,杭州310058; [2]浙江大學(xué)寧波理工學(xué)院,寧波315100

文章摘要：為部署和運(yùn)行符合桃園灌溉應(yīng)用要求的無線傳感網(wǎng)絡(luò)，選取2470MHz載波頻率，以長(zhǎng)時(shí)間監(jiān)測(cè)數(shù)據(jù)包傳輸率為基礎(chǔ)獲得可靠通信距離為40in，短時(shí)間內(nèi)數(shù)據(jù)包傳輸率監(jiān)測(cè)結(jié)果的分析表明無線鏈路在短時(shí)間內(nèi)的變化很劇烈，且鏈路間沒有明顯的相關(guān)性。根據(jù)應(yīng)用要求和鏈路特點(diǎn)設(shè)計(jì)了無線傳感網(wǎng)絡(luò)的通信協(xié)議；為降低監(jiān)聽功耗，對(duì)泛洪時(shí)間同步協(xié)議進(jìn)行改進(jìn)，，設(shè)計(jì)了更符合本應(yīng)用要求的泛洪一固定根節(jié)點(diǎn)時(shí)間同步協(xié)議；針對(duì)短時(shí)間內(nèi)鏈路質(zhì)量變化劇烈的特點(diǎn)，改進(jìn)采集樹路由協(xié)議以提高數(shù)據(jù)包傳輸效率，將兩種協(xié)議結(jié)合，設(shè)計(jì)了較完備的通信協(xié)議，并在TinyOS無線傳感網(wǎng)絡(luò)操作系統(tǒng)上用nesC的編程方法進(jìn)行實(shí)現(xiàn)，最后在桃園中進(jìn)行現(xiàn)場(chǎng)實(shí)驗(yàn)，結(jié)果表明：全網(wǎng)節(jié)點(diǎn)時(shí)間同步的誤差小于10ms，研究的通信協(xié)議與基于MuhihopLQI的通信協(xié)議相比，數(shù)據(jù)包傳輸率提高8％～15％，兩節(jié)AA電池可供節(jié)點(diǎn)運(yùn)行264d，具有很低的功耗。

Abstr：With the aim to deploy wireless sensor networks and accommodate to application in a peach garden, the frequency of 2 470 MHz was selected, a distance of 40m was defined as a reliable communication distance based on the monitoring of variance of packet deliver rate in long term, the result and analysis of short term monitoring of packet delivery rate showed that quality of wireless links changed greatly in short term and there were no significant correlation between them. Then a communication protocol was designed based on the requirement of application and the characteristics of links：with the aim to reduce power consumption of listening , the flooding time synchronization protocol was improved and flooding-stable root time synchronization protocol was designed; as the link quality changes greatly in short time the collection tree protocol was improved to enhance the packet deliver efficiency, a comparatively complete communication protocol was designed by combining these two protocols above. After that the protocol was implemented with nesC language in TinyOS, finally field tests were carried out in the peach garden, the result shows that the time synchronization errors are less than 10 ms in the whole net, the packet delivery rate of communication protocol is 8% -15% higher than that of communication protocol based on MuhihopLQI. A TelosB node can run 264 d, with the supply power of two AA batteries, indicating that the communication protocol achieves very low power consumption.

文章關(guān)鍵詞：

Keyword：:Peach garden Wireless sensor networks Packet delivery rate Time synchronization protocol Routing protocol

課題項(xiàng)目：寧波市自然科學(xué)基金資助項(xiàng)目（2011A610135）和浙江省科技廳重大科技專項(xiàng)（優(yōu)先主題）工業(yè)項(xiàng)目（2009C11041）

  本文關(guān)鍵詞：桃園中無線傳感網(wǎng)絡(luò)通信協(xié)議改進(jìn)設(shè)計(jì)，由筆耕文化傳播整理發(fā)布。