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KVM 开关

用于 KVM 切换的 SDVoE 半导体解决方案

用于 Professional AV 或 Pro AV 的 Semtech 屡获殊荣的 BlueRiver® 技术用于 KVM 切换,允许计算机操作员使用一组操作设备(键盘、视频、鼠标)控制多个器件。

BlueRiver enables low cost KVM over IP applications with simple integration into third party KVM software systems. Support for fully networked KVM switching allows powerful applications such as single operator control of multiple computers with one set of USB peripherals.

KVM Point-to-Point Switching

The most common KVM application is point-to-point switching and routing for secure remote desktop applications. This allows users to sign in to any KVM workstation and remotely connect to a dedicated PC host, secured in an equipment room to prevent unauthorized access. This architecture is typically used in command-and-control center applications, where sources are in a machine room to decrease clutter and environmental noise.

Collaboration

By connecting multiple KVM workstations over an IP network, a single PC can be subscribed to all users to allow collaboration on a single desktop. For example, in a classroom environment, students may be asked in turn to select answers to a quiz on screen that they are all observing simultaneously. Using simple software control, teaching staff can enable and disable the individual student participation.

Dynamic Switching

由于所有 USB 控制数据都通过 10G 网络以 IP 数据包的形式发送,因此可以实现更高级的 KVM 应用(需要使用第三方 KVM 软件进行动态切换和控制)。在此示例中,单个用户(或高级用户)可以动态控制多个主机。只需在多台显示器上移动鼠标,KVM 服务器即可在四台远程 PC 之间智能切换。

 

Power User

详细查看高级用户应用,如左图所示,每个远程 PC 的视频输出和 USB 都连接到基于 AVP 的发射器。然后,每台远程 PC 的视频输出通过 10G 网络路由到连接到工作站显示器的专用接收器。右下方基于 AVP 的接收器通过 USB 连接键盘和鼠标。利用 SDVoE API,第三方 KVM 软件可以订阅从发射器到接收器的每个视频馈送,同时还将每个 USB 主机和器件连接到 KVM 服务器 IP 地址。KVM 软件现在可以控制所有 USB 流量切换和路由的系统,并通过检测鼠标位置,可以确定何时将用户控制从一台远程 PC 切换到另一台。例如,当用户将鼠标移动到显示器 1 的右边缘时,USB 控制从远程 PC 1 切换到 PC2。当鼠标一直向右移动到显示器 2 的边缘时,USB 控制会从远程 PC 2 动态切换到 PC 3。

图 4. 高级用户应用示例,通过 SDVoE 服务器和第三方 KVM 软件控制器使用基于 AVP 的发射器和接收器。

Figure 5. Remote desktop dynamic switching

Remote Desktop

Many environments need to optimize floor space and physical workstation sizes, allowing companies and organizations to reduce their building costs and environmental footprint. By simplifying workstations to just a single display with a mouse and keyboard, servers and desktop PCs can be kept in a dedicated secure and IT-controlled room, and accessed via the networked remote desktop, as shown in the diagram. Other benefits of this remote desktop architecture include reduced noise levels in the workspace since there are no more noisy fans, and physical security of PC’s to prevent unauthorized access or tampering. Both building management and IT departments benefit from AVP-enabled KVM over IP systems.

提供全面的参考设计,因此 KVM 系统设计人员可以评估由 Semtech 的 BlueRiver 器件驱动的典型远程桌面或工作站的性能。下图所示为使用两个 RDK-AVP2000T 参考设计套件的简单设置,一个配置为具有本地 USB 的发射器,另一个配置为具有远程 USB 的接收器。结合使用强大的 SDVoE API 和 Semtech 的 Pro AV 控制器软件评估工具,可进行配置和控制。

图 6.使用 RDK-AVP2000T 参考设计套件的简单设置,一个配置为具有本地 USB 的发射器,另一个配置为具有远程 USB 的接收器。SDVoE API 和 Semtech 的 Pro AV 控制器软件评估工具一起提供配置和控制。

Inside the Box with AVP1000: A Powerful and Seamless KVM Switching Solution

Low latency performance is key to KVM applications, where hand to on screen mouse movement reaction time needs to be imperceptible to the user. The speed of 10G networking combined with the lowest latency AVP1000-based products, provides the ideal solution for powerful and seamless KVM switching with only a handful of major components. For 10G fiber support, the AVP2000 can be used coupled with a standard SFP+ optical module.

MCU HD MI P ort Swi t ch F l a sh SPI T MDS I2 C 25MHz XFIMDIO

Figure 7. This AVP1000-based transmitter delivers powerful and seamless KVM switching with only a handful of major components.

Mouse to screen lag becomes noticeable by the user at around 50ms of latency, or delay. With a combination of both AVP1000-based Transmitters and Receivers, sub-millisecond end-to-end latency is guaranteed, ensuring operators see no lag between moving their mouse or typing and on-screen response. In power user applications, switching between hosts is also seamless due to the speed and power of 10G Ethernet networking.

MCU HD MI P ort Swi t ch F l a sh SPI T MDS I2 C PLL25MHz XFIMDIO

Figure 8. Using a combination of AVP1000-based transmitters and receivers ensures sub-millisecond end-to-end latency.

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