一种基于DAVIC模型的音视频传感器网络的体系结构

作为传感器网络的高级形式，音视频传感器网络在环境监控、安全监控以及医疗保健等诸多应用领域发挥重要作用。本文从音视频传感器网络的特点出发，设计了一种基于单跳簇结构的音视频传感器网络体系结构。本文将DAVIC模型应用到音视频传感器网络中，并加以改进，从而建立一个适用于音视频传感器网络的音视频服务模型。在此基础上，进一步描述了使用此音视频服务模型构建环境监测系统的方法和协议流程，并将环境监测分为请求服务模式和主动服务模式两种形式进行讨论。本文提出的体系结构和服务模型使音视频传感器网络以服务为核心，能够给用户以及上层应用提供灵活、可靠的音视频服务。最后，通过一个典型应用实例说明本文提供的体系结构和服务模型能灵活满足用户需求，很好地支持音视频传感器网络应用的实现。

An Audio/Video Sensor Network Architecture Based on DAVIC Model

As the advanced sensor networks,the audio/video sensor networks can provide rich multimedia information,which doubtlessly benefit data hungry applications such as environment monitoring,health care,emergency response and video security.On the basis of the distinct characteristics of the audio/video sensor networks,a kind of architecture for the audio/video sensor networks is designed based on a single hop cluster.In this paper,we introduce an improved DAVIC model into the audio/video sensor networks,thus establishing an audio/video service model for the audio/video sensor networks.Furthermore,this paper details how to buildup an environment monitoring system according to our audio/video service model,and describes its protocol flows.In particular,we classify the environmental monitoring patterns into two categories: the request service patterns and the active service pattern.The architecture and service model proposed in this paper turn service into the kernel of the audio/video sensor networks,and provide flexible and reliable the audio/video services to users and in upper applications.Finally,a typical application case is described to show that our audio/video sensor networks architecture and audio/video service model can flexibly meet the requirements of users and support realization of audio/video sensor networks applications.