怎么理解AP AUTOSAR ara::com中的CommunicationGroup？

The Communication Group is a communication concept based on ara::com which is designed for Adaptive State Management applications. It can be seen as a composite Service which manages information routing in a defined manner. A Communication Group has one server and multiple clients. The server is able to send broadcast and peer to peer messages to the clients of a Communication Group. The clients can acknowledge these messages. The server of a Communication Group can further verify how many clients are connected to the Communication Group at every time. Applications can connect/disconnect to a Communication Group instance using one of the two Communication Group Service Interfaces, CommunicationGroupServer or CommunicationGroupClient.

通信组是一种ara::com的功能，它可以让自适应状态管理的应用程序更好地传递信息。它就像一个包含多个服务的大服务，它有一个服务器和很多客户端。

服务器可以给客户端发各种各样的消息，客户端可以回复。服务器也可以知道有多少客户端在跟它联系。应用程序可以用CommunicationGroupServer或