中文摘要：

面对实时多媒体组通信应用中带宽瓶颈及用户对服务质量的不同需求，通过对带宽、时延、抖动等网络性能指标施加约束，设计一个满足大规模用户带宽需求的覆盖组播算法（BOM），用于构建层次化的覆盖组播树，平衡服务代理节点间的负载和链路间的流量．通过基于GT-ITM的网络仿真实验，证明该方法在实时流传输中具有较低的延迟、较小的抖动性和良好的可扩展性．

英文摘要：

To solve the bottleneck of bandwidth and the QoS of live streaming delivery, the algorithm of Bandwidth-Satisfied overlay multicast （BOM） is suggested by constrained the bandwidth,delay and jitter. BOM can balance the overlay traffic and the load on the SvBs,and build the layered overlay multicast tree and minimize the cost of multicast tree. It is testified availability and scalability for Large-Scale Live Streaming group communication by in GT-ITM network simulation environment.