ETSI TS 102 461定义了IPv4多播协议互通所需的体系结构和功能， 包括使用BSM的多播源。本文件以第2条中提及的先前BSM文件为基础，尤其是ETSI TS 102 294[1] BSM多播功能体系结构研究。本文档首先考虑了用于IP多播互通的BSM网络场景，主要有两种 方面:卫星网络架构；静态或动态地管理多播源和数据转发。然后导出BSM功能和协议架构，用于管理:IP多播控制消息（组管理和路由协议）；组播访问控制（包括资源管理）； 和多播地址解析。

ETSI TS 102 461 defines the architectures and functions required for the interworking of IPv4 multicast protocols, including multicast sources, with the BSM.The present document builds upon previous BSM documents referenced in clause 2, and notably ETSI TS 102 294 [1] on BSM Multicast Functional Architecture.The present document firstly considers the BSM network scenarios for IP multicast interworking, with two main aspects:the satellite network architecture;the management of multicast sources and data forwarding, either statically or dynamically.The BSM functional and protocol architectures are then derived for management of:IP multicast control messages (group management and routing protocols);Multicast access control (including resource management); andMulticast address resolution.