Upper-layer protocol A protocol above IP that uses IP as its transport.
上层协议位于IP 之上并将IP 用作其传输层的协议。
In the system, the upper layer application software for the USB embedded host in household entertainment products is designed and implemented based on USB Protocol, by resolution of DVD.
系统在usb协议基础上，以DVD解决方案为依托，实现嵌入式usb主机系统在家庭娱乐消费产品中的应用软件设计与实现。
This technology auto accomplished in physical layer, no need upper protocol layer support, has the strongpoint of fast switching and short application resume time.
该技术完全在物理层自动完成，无需上层协议的支持，具有快速切换和业务恢复时间短等优点。
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