自由光通信网络作为一种新兴的宽带无线网络，适用于多媒体通信的要求。针对多媒体业务在FSO网络中的传输进行了研究，考虑FSO网络的特点，提出了适用于多媒体任务的FSO网络模型。利用该模型，设计了基于拓扑控制算法的路由算法TCR。TCR改进三角剖分算法进行拓扑控制，形成虚拟拓扑图，使得节点的平均吞吐量大；同时，TCR是基于位置的、按需和主动混合的路由，适用于数据量大，实时性要求高的多媒体通信需求。

To meet the requirement of multimedia communication, the paper presents a new mobility model(FSOM). FSOM takes special requirements of mobile multimedia services into consideration, and is fit for the characteristics of Free-space Optical Networks. A routing algorithm, using FSOM, is proposed for multimedia services in Free-space Optical Networks. This routing algorithm called TCR is based on topology control algorithm(TTC). TTC controls topology using improved triangulation algorithm. After executing TTC, we acquire Virtual Graph, which increases the average throughput. Formass data and real-time requirement of multimedia communication, TCR combines the proactive and reactive routing, which is based on VirtualGraph.