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应用层组播技术不需要网络层设备的支持,适合用于流媒体服务。在基于单播的流媒体直播系统基础上,设置应用层组播服务器,赋予客户端转发数据的能力,设计符合流媒体特点的应用层组播协议,形成了基于应用层组播的流媒体直播系统。按照该方案开发的原型系统运行状况表明,该设计方案能够稳定地提供流媒体服务。相比于基于单播的流媒体直播系统,采用应用层组播技术可以明显提高系统的用户数量,并保持较好的服务质量。
Application layer multicast technology does not require network layer device support, suitable for streaming media services. Based on the unicast streaming media broadcast system, an application layer multicast server is set up to give the client the ability to forward data. The application layer multicast protocol that conforms to the characteristics of streaming media is designed to form a live streaming media broadcast based on the application layer multicast system. The prototype system operating under this solution showed that the design solution can provide streaming media services stably. Compared with the unicast-based streaming media live broadcast system, the application layer multicast technology can significantly improve the number of users of the system and maintain good quality of service.