WLAN对IEEE 802.15.4无线传感器网络干扰的研究

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3.0 侯斌 2024-11-19 4 4 1.18MB 54 页 15积分
侵权投诉
无线传器网是当信息术领研究与应用的之一经过多年的
无线传感器网络已经快速进入段。IEEE 802.15.4 通信协议是专针对
无线传感器网络设通信协议是无线传感器网络通信协议中MAC
体实
环境,存各种扰因素线传感网络扑频变化
部分,影无线网络数据的可靠性会因通信加而
量消耗能量,缩无线传感器网络时间IEEE 802.11b 通信协议无线
域网重要扰源之一与无线传感网络不地会距离共存。
研究 IEEE 802.15.4 通信协议抗干扰性能具重要
本文要针对 IEEE 802.15.4 通信协议研究其与无线域网
干扰性本文在对无线传感器网络IEEE 802.15.4 通信协议研究基础上,
研究 IEEE 802.15.4 抗干扰性能完成了干扰研究
测试平台测试平台括节测试统及据分析软件。测试节
TI CC2430 射频芯片,以 IEEE 802.15.4 通信协议验需要设
种情况线通信序;数据分析软平台成了测试数据的分
最后搭建干扰研究测试平台,以价因,定
种典型场系统抗干扰性。同,分了影响射层丢因素及其与
号强度RSSI
研究显示IEEE 802.15.4 的数据输会与之WLAN
干扰干扰程度随着 IEEE 802.15.4 点发减小来自 WLAN
干扰越强IEEE 802.15.4 RSSI 值越大,RSSI IEEE 802.15.4
正相关。研究究无线传感网络的同干扰技术了有
据。
:无线器网络 IEEE 802.15.4 协议 线域网 干扰
丢包率 RSSI
ABSTRACT
Wireless sensor network is one of the research and application in the current
information and technology field. WSN has quickly entered the practical stage after
years of development. IEEE 802.15.4 communication protocol is designed specifically
for WSN and it is the implementation in physical layer and MAC layer of WSN.
There are a variety of interfering factors in Practical applications. These interfering
factors result in frequent changes in network topology of WSN and some of the WSN
nodes isolated and affect the reliability of WSN data transmission. WSN networks
lifetime will be reduced due to large consumption of energy. Wireless Local Area
Network which based on IEEE 802.15.4b is one of the important interference source
and it will inevitably close to WSN. Therefore, it has important practical significance to
study the anti-interference performance of IEEE 802.15.4 protocol.
This paper mainly analyzes of anti-interference performance of IEEE 802.15.4
protocol when it coexists with IEEE 802.11b. The experimental study program is based
on the deeply study of WSN and IEEE 802.15.4 protocol. This paper establishes
interference test platform according to the experimental study program. The platform
consists of nodes test system and data analysis software. The nodes test system selects
TI CC2430 RF chip and wireless communication nodes under the program is designed
according to IEEE 802.15.4 protocol. The analysis and statistics of test packet is
accomplished in data analysis software. This paper quantitative analysis of the
anti-interference of the system in a variety of typical scenarios finally, using packet loss
rate as evaluation factors. Meanwhile, the correlation between factors of impact of radio
layer packet loss rate and RSSI is analyzed.
The results showed that data transmission in IEEE 802.15.4 channel will be
affected by WLAN overlapped with it. And the degree of interference will decrease with
the increase of transmit power of IEEE 802.15.4 nodes. RSSI of IEEE 802.15.4 channel
will increase if the inference of WLAN is stronger. RSSI value and IEEE 802.15.4
channel packet loss rate is positively correlated. The research provides a valuable
experimental basis for the study of WSN anti-interference technology in same
frequency.
Key words: Wireless Sensor Network, IEEE 802.15.4, Wireless Local
Area Network, interference, packet loss rate, RSSI
摘要
ABSTRACT
.................................................... 1
§1.1 ..................................................... 1
§1.2 背景............................................... 1
§1.2.1 题背景 ............................................. 1
§1.2.2 研究 ............................................. 3
§1.3 国内外研究........................................... 3
§1.4 论文研究内容....................................... 5
第二章 无线传感器网络IEEE 802.15.4 ....................... 6
§2.1 无线传感器网络........................................... 6
§2.1.1 无线传感器网络宏观 ......................... 6
§2.1.2 无线传感器网络通信体 ........................... 7
§2.1.3 无线传感器网络优势 ................................. 8
§2.2 IEEE 802.15.4 ....................................... 9
§2.2.1 PHY ....................................... 10
§2.2.2 MAC ............................................ 11
§2.3 章小结................................................ 14
第三章 2.4GHz 无线通信技术干扰研究 ..................... 15
§3.1 2.4GHz ISM 无线通信技术 ............................. 15
§3.1.1 ZigBee 技术 ......................................... 15
§3.1.2 Wi-Fi 技术 .......................................... 15
§3.1.3 蓝牙技术 ............................................ 16
§3.1.4 HomeRF 技术 ......................................... 17
§3.2 2.4GHz ISM 干扰研究 ................................. 17
§3.3 CAOS干扰研究中................ 19
§3.3.1 CAOS ....................................... 19
§3.3.2 IEEE 802.15.4 ........................ 19
§3.4 章小结................................................ 22
第四章 无线传感器网络干扰测试系统节点设 ...................... 23
§4.1 干扰研究标与研究.............................. 23
§4.2 CC2430 射频芯片 ......................................... 23
§4.3 技术介绍与实...................................... 24
§4.3.1 DMA .......................................... 24
§4.3.2 接受号强度RSSI .......................... 25
§4.3.3 空闲估(CCA ................................. 26
§4.3.4 ............................................ 27
§4.3.5 频率 .......................................... 28
§4.3.6 数据效载荷 ...................................... 29
§4.4 核心函................................................ 29
§4.4.1 射频初始 .......................................... 29
§4.4.2 送数据 .......................................... 30
§4.4.3 接收数据 ............................................ 30
§4.5 章小结................................................ 30
第五章 无线数据采析系统 ................................ 31
§5.1 系统介绍................................................ 31
§5.2 串口................................................ 34
§5.3 串口数据取与...................................... 34
§5.3.1 串口数据与实 .............................. 34
§5.3.2 数据 ............................................ 36
§5.4 章小结................................................ 37
第六章 干扰研究测试 ............................................ 38
§6.1 干扰研究方........................................ 38
§6.1.1 干扰研究测试场 .................................. 38
§6.1.2 干扰研究实 .................................... 38
§6.2 WLAN 变化的影 ......................... 39
§6.2.1 干扰测试步骤 .................................. 39
§6.2.2 数据分 ............................................ 40
§6.2.3 ................................................ 40
§6.3 IEEE 802.15.4 点发率变化 .......................... 41
§6.3.1 干扰测试步骤 .................................. 41
§6.3.2 数据分 ............................................ 41
§6.3.3 ................................................ 41
§6.4 响射频层丢因素环境 RSSI ......... 42
§6.4.1 干扰测试步骤 .................................. 42
§6.4.2 数据分 ............................................ 42
§6.4.3 ................................................ 43
§6.5 WLAN 干扰源强度未知 ............................... 43
§6.5.1 干扰测试步骤 .................................. 43
§6.5.2 数据分 ............................................ 43
§6.5.3 ................................................ 43
§6.6 章小结................................................ 44
第七章 总结与展 .............................................. 45
§7.1 论文总结................................................ 45
§7.2 研究展................................................ 45
参考 ....................................................... 47
公开发表的论文和承担项目取得 ................. 50
........................................................... 51
1
第一章
§1.1 引言
信息术领研究开发热点之一无线感器网络WSN
过多年的与开发快速进入段。不过多无线传感网络
性能满足网络时间短数据网络
盖失败问题直接线感器网络体应环境各种
干扰因素网络拓扑频繁变化和部分数据的可靠性
也会因通信量增而消耗能量,使网络时间显著[1-2]IEEE
802.11 无线域网Wireless Local NetworkWLAN在实中是一个
干扰源
前无线传感器网络之一是 IEEE 802.15.4
广泛2.4GHz使用该频段的括基IEEE 802.11bWLAN
IEEE 802.15.1蓝牙通信系统1-1显示2.4G Hz段,IEEE 802.15.4
IEEE 802.11b 技术段使用情况[3]IEEE 802.15.4 带宽3MHz,
IEEE 802.15.4 带宽22MHzIEEE 802.11b IEEE 802.15.4
个信这两用了抗干性能直接(DSSS)
“先听干扰制,是信使
干扰数据[3-4]
1-1 IEEE 802.15.4 IEEE 802.11b 2.4GHz 段的频率范围
§1.2 意义
§1.2.1 题背景
随着科技术的进便携式网络着越来越重要的作用。
摘要:

摘要无线传感器网络是当前信息技术领域研究与应用的热点之一,经过多年的发展,无线传感器网络已经快速进入实用阶段。IEEE802.15.4通信协议是专门针对无线传感器网络设计的通信协议,是无线传感器网络通信协议中物理层与MAC层的具体实现。实际应用环境中,存在各种干扰因素,导致无线传感器网络拓扑频繁变化和部分节点孤立,影响无线传感器网络数据传输的可靠性,也会因通信量增加而大量消耗能量,缩短无线传感器网络生存时间。基于IEEE802.11b通信协议的无线局域网是重要的干扰源之一,它与无线传感器网络不可避免地会近距离共存。因此,研究IEEE802.15.4通信协议抗干扰性能具有重要现实意义。本文主要针...

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作者:侯斌 分类:高等教育资料 价格:15积分 属性:54 页 大小:1.18MB 格式:PDF 时间:2024-11-19

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