基于802.15.4与Ad-hoc的语音多跳通信技术研究与实现
发布时间：2018-11-05 08:01
【摘要】：近年来,无线传感器网络技术已经变得日益成熟,其物理层基础是IEEE802.15.4,最初仅针对低速率、低成本、低功耗的应用,随着对监控数据丰富需求的增加,节点配备有麦克风及摄像头的无线多媒体传感网络,已经成为研究热点,并在边境控制、灾害管理、应急救援、区域通信等多领域发挥重要作用。本文对语音多跳传输技术进行研究,结合IEEE 802.15.4的低功耗与低成本特性,以及Ad-hoc网络的无中心、自组织、抗摧毁等特性,设计的语音传输系统可以在目标区域通过节点的多跳转发实现语音传输。设计并实现的节点可对声音信号进行采集、编码、传输、解码、还原。针对在低速率的无线传感器网络上传输较大数据量的语音数据时,节点能量、网络容量、语音质量之间矛盾的问题,提出带有负载及能量均衡的网络路由算法,设计并实现了带有语音QoS的语音多跳传输协议。协议包括地址分配算法、最短路由算法、网络维护方法、路由表结构设计、数据包格式设计、单播以及广播实现方法等等。为获得大规模节点下协议的运行状况,使用NS3对设计的协议进行仿真,结果表明其满足多跳语音传输的要求。系统测试单跳视距传输可达200米,5个节点4跳传输测试丢包率在5%左右,获得了良好的语音通话效果。设计并实现的低成本、低功耗的无线语音多跳传输系统,其潜在应用领域包括军事通信、灾难救助、矿井通信、长距通信、区域监控以及基础通信延伸等,具有重要意义。
[Abstract]:In recent years, wireless sensor network (WSN) technology has become more and more mature. The physical layer of WSN is based on the application of low speed, low cost and low power consumption. Wireless multimedia sensor networks equipped with microphones and cameras have become a research hotspot and play an important role in border control, disaster management, emergency rescue, regional communications and other fields. In this paper, the speech multi-hop transmission technology is studied, which combines the low power and low cost characteristics of IEEE 802.15.4, as well as the characteristics of Ad-hoc network, such as no center, self-organization, anti-destruction and so on. The designed voice transmission system can transmit the voice in the target area through the multi-hop transmission of nodes. The designed and realized node can collect, encode, transmit, decode and restore the sound signal. Aiming at the contradiction among node energy, network capacity and voice quality, a network routing algorithm with load and energy balance is proposed to solve the problem of the contradiction between node energy, network capacity and speech quality when transmitting large amount of voice data in low rate wireless sensor networks. A speech multi-hop transmission protocol with voice QoS is designed and implemented. The protocol includes address assignment algorithm, shortest routing algorithm, network maintenance method, routing table structure design, packet format design, unicast and broadcast implementation method and so on. In order to obtain the running status of the protocol under large-scale nodes, the designed protocol is simulated by NS3, and the results show that the protocol meets the requirements of multi-hop voice transmission. The test results show that the system can transmit 200 meters in single hop and 5 nodes in 4 hops, and the packet loss rate is about 5%. The result of voice communication is good. The design and implementation of a low-cost, low-power wireless voice multi-hop transmission system, its potential applications include military communications, disaster relief, mine communications, long-distance communications, regional monitoring and basic communication extension, and so on.
【学位授予单位】：长安大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TN929.5;TP212.9
本文编号：2311421
[Abstract]:In recent years, wireless sensor network (WSN) technology has become more and more mature. The physical layer of WSN is based on the application of low speed, low cost and low power consumption. Wireless multimedia sensor networks equipped with microphones and cameras have become a research hotspot and play an important role in border control, disaster management, emergency rescue, regional communications and other fields. In this paper, the speech multi-hop transmission technology is studied, which combines the low power and low cost characteristics of IEEE 802.15.4, as well as the characteristics of Ad-hoc network, such as no center, self-organization, anti-destruction and so on. The designed voice transmission system can transmit the voice in the target area through the multi-hop transmission of nodes. The designed and realized node can collect, encode, transmit, decode and restore the sound signal. Aiming at the contradiction among node energy, network capacity and voice quality, a network routing algorithm with load and energy balance is proposed to solve the problem of the contradiction between node energy, network capacity and speech quality when transmitting large amount of voice data in low rate wireless sensor networks. A speech multi-hop transmission protocol with voice QoS is designed and implemented. The protocol includes address assignment algorithm, shortest routing algorithm, network maintenance method, routing table structure design, packet format design, unicast and broadcast implementation method and so on. In order to obtain the running status of the protocol under large-scale nodes, the designed protocol is simulated by NS3, and the results show that the protocol meets the requirements of multi-hop voice transmission. The test results show that the system can transmit 200 meters in single hop and 5 nodes in 4 hops, and the packet loss rate is about 5%. The result of voice communication is good. The design and implementation of a low-cost, low-power wireless voice multi-hop transmission system, its potential applications include military communications, disaster relief, mine communications, long-distance communications, regional monitoring and basic communication extension, and so on.
【学位授予单位】：长安大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TN929.5;TP212.9
【参考文献】
相关硕士学位论文 前1条
1 朱佳鸽;基于物联网的智能家居系统的设计与实现[D];长安大学;2013年
，本文编号：2311421
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