摘要
设计实现基于JN5139模块的全双工VoIP语音与数据同传终端,解决了缓冲区不足造成的声音断续问题.将其应用于多媒体无线传感器网络中,在Cluster+AODVjr的路由算法基础上,提出基于数据类型的路由策略,避免RREQ分组大量洪泛,并均衡节点能量消耗.借助E-model方法对语音质量进行评价,最远语音传输距离达150m,最高数据丢包率在8%以下.
A terminal unit which has simultaneous audio and data transmit ability based on the JN5139 module is designed for applying it to a multimedia wireless sensor network,and the audio stutter problem caused by buffer underrun is solved.On the basis of Cluster＋AODVjr routing algorithm,a routing strategy based on data type is proposed,which can prevent RREQ from flooding and can balance energy costs of the nodes.The sound quality is evaluated by using E-model,the result shows that the longest transmission distance can reach 150 m,and the data packet loss ratio can be reduced to less than 8%.
出处
《北京理工大学学报》
EI
CAS
CSCD
北大核心
2011年第3期299-302,共4页
Transactions of Beijing Institute of Technology
基金
北京理工大学基础研究基金资助项目(20080642001)
关键词
ZIGBEE
数话同传
路由算法
语音质量
Zigbee
simultaneous audio and data transmission
routing algorithm
sound quality
