水声通信技术已发展到网络化阶段，水声网络多媒体信息的可靠传输使得在海洋实现全方位、立体化通信成为可能。然而，窄带宽、长延迟、高误码率、多径效应、高时空变等特性给水声网络多媒体信息传输技术带来巨大挑战。青藏高原二次科考需要多次大范围收集三江源水生态多媒体信息。项目采用高度灵活、智能的水下自驱组网架构，以数据传输可靠性为首要目标，均衡考虑延时、能耗和吞吐量等多性能指标，研究基于规则与感知模型的MAC机制，应用图理论构建基于生成树的无环、无空洞、单径路由方案，进一步融合过滤式降维译码的数字喷泉码方案，形成水下航行器与水下节点联合组网的一套完整、可靠的多媒体信息水声网络传输协议模型，并在NS3仿真平台和三江源水声网络实验床进行综合试验验证与应用。这不仅对三江源水生态保护有着深远意义，并且在水下资源勘探、海洋数据收集、地震/海啸预警、国防安全等领域具有广泛的应用前景。

The technology of underwater acoustic communication has developed towards the stage of network, and the technology of reliable transmission of multimedia information in underwater acoustic network makes it possible to communicate in oceans comprehensively. Nevertheless, the characteristics of underwater acoustic network, such as narrow bandwidth, long delay, high bit error rate, multipath effect and great space-time variety, bring about great challenges to the transmission of multimedia information in underwater acoustic network. The second Scientific Examination of Qinghai-Tibet Plateau needs to collect multimedia information on water ecology of the source of the Three Rivers on a large scale for many times. So, the project adopts a highly flexible and intelligent underwater self-driving networking architecture. Considering the reliability of data transmission as the primary objective, the performance such as delay, energy consumption and throughput should be balanced. Firstly, MAC mechanism based on rule and perception model is studied. Secondly, a ring-free, hollow-free and single-path routing scheme based on spanning tree is constructed using graph theory. Furtherly, a digital fountain code scheme with filtering and dimensionality reduction decoding is put forward. Finally, a complete and reliable transmission protocol model of multimedia information in underwater acoustic network is formed. The complete transmission model is verified comprehensively on NS3 simulation platform and Sanjiang Source underwater acoustic network experimental bed. Our research has great significance for the protection of environment in the Three Rivers Source area. The research has widely prospect in underwater resources exploration, marine data collection, seaquake warning, national defense and other fields.