信息技术 - UPnP设备架构 - 第20-11部分:音频视频设备控制协议 - 第4级 - 连接管理器服务

[中文适用范围]： 此服务定义符合 UPnP 设备架构 1.0 版 [14]。此服务类型支持对 A/V 设备的流媒体功能进行建模，并在设备之间绑定这些功能。每个能够根据 UPnP AV 架构发送或接收流的设备都将拥有一个 ConnectionManager 服务实例。此服务为控制点提供了一种机制，用于：a) 在源/服务器设备和接收/渲染器设备之间执行功能匹配；b) 查找网络中当前正在进行的传输信息；c) 在设备之间建立和断开连接（当流媒体协议需要时）。ConnectionManager 服务足够通用，可以正确抽象不同类型的流媒体机制，例如基于 HTTP 的流媒体、基于 RTSP/RTP 的流媒体和基于 1394 的流媒体。ConnectionManager 使控制点能够在建立连接时从物理媒体互连技术中抽象出来。此服务模板中使用的术语“流”指的是模拟和数字数据传输。 [外文原描述]： ISO/IEC 29341-20-11:2017 is compliant with the UPnP Device Architecture version 1.0 [14]. This service-type enables modeling of streaming capabilities of A/V devices, and binding of those capabilities between devices. Each device that is able to send or receive a stream according to the UPnP AV Architecture will have 1 instance of the ConnectionManager service. This service provides a mechanism for control points to: a) Perform capability matching between source/server devices and sink/renderer devices, b) Find information about currently ongoing transfers in the network, c) Setup and teardown connections between devices (when required by the streaming protocol). The ConnectionManager service is generic enough to properly abstract different kinds of streaming mechanisms, such as HTTP-based streaming, RTSP/RTP-based and 1394-based streaming. The ConnectionManager enables control points to abstract from physical media interconnect technology when making connections. The term ?stream' used in this service template refers to both analog and digital data transfer.