检测不稳定的网络连接

Omnissa Horizon Client 可以在远程会话期间监控网络质量，并在检测到由于高延迟而导致网络不稳定时显示通知消息。网络延迟基于 TCP 连接的往返时间 (RTT)，以及 BEAT 和 UDP 连接的 RTT、丢包率和 RTT 变化 (RTTV)。

您可以使用 Horizon Client 设置或组策略对象 (GPO) 来控制这些通知消息的显示。您还可以配置 Horizon Client 用于确定不稳定网络的阈值参数。

使用“设置”窗口显示网络通知

您可以从“设置”窗口启用和禁用网络通知。

1. 启动 Horizon Client。

2. 单击菜单栏右上角的设置（齿轮图标），然后选择 Omnissa Horizon Blast。

   

3. 配置网络不稳定时通知的显示。

   • 要启用网络通知，请将禁止显示网络状态选项切换为“关”。默认情况下，此选项设置为“关”以允许显示通知。
   • 要禁用网络通知，请将禁止显示网络状态选项切换为“开”。

使用客户端 GPO 显示网络通知

您还可以使用禁用显示网络状态 GPO 选项来启用和禁用网络通知。有关更多信息，请参阅使用组策略设置配置 Horizon Client。

Horizon Client 如何确定网络质量

为确定网络连接的质量，Horizon Client 会将指定时间间隔内的网络状况与一对低阈值和高阈值进行比较，并计算 0% 到 100% 的质量评分。如果评分低于特定百分比，则网络将被视为高延迟且不稳定。

Horizon Client 根据使用的网络协议衡量以下网络条件。

然后，Horizon Client 使用以下规则计算网络质量评分：

TCP Connections

Definitions:
rtt = detected RTT value
lowBound = RTT low threshold
highBound = RTT high threshold
score = overall network quality score

Rules:
If rtt >= highBound, then score = 0 (network is considered POOR)
If rtt <= lowBound, then score = 100 (network is considered GOOD)
If lowBound < rtt < highBound, then score = 100 * (rtt / (highBound - lowBound))

BEAT and UDP Connections

Definitions:
RTT = detected RTT value
RTT_extreme = RTT extreme threshold
RTT_lowBound = RTT low threshold
RTT_highBound = RTT high threshold
RTT_score = RTT quality score
RTT_weight_percentage = weight of RTT quality score

PkLoss = detected packet loss value
PkLoss_extreme = packet loss extreme threshold
PkLoss_lowBound = packet loss low threshold
PkLoss_highBound = packet loss high threshold
PkLoss_score = packet loss quality score
PkLoss_weight_percentage = weight of packet loss quality score


RTTV = detected RTT variation
RTTV_lowBound = low RTTV threshold
RTTV_highBound = high RTTV threshold
RTTV_score = RTTV quality score
RTTV_weight_percentage = weight of RTTV quality score

score = overall network quality score

Rules:
If RTT > RTT_extreme, then score = 0 (network is automatically considered POOR, all other calculations are skipped)
If RTT >= RTT_highBound, then RTT_score = 0
If RTT <= RTT_lowBound, then RTT_score = 100
If RTT_lowBound < RTT < RTT_highBound, then RTT_score = 100 * (rtt / (RTT_highBound - RTT_lowBound))

If PkLoss > PkLoss_extreme, then score = 0 (network is automatically considered POOR, all other calculations are skipped)
If PkLoss >= PkLoss_highBound, then PkLoss_score = 0
If PkLoss <= PkLoss_lowBound, then PkLoss_score = 100
If PkLoss_lowBound < PkLoss < PkLoss_highBound, then PkLoss_score = 100 * (PkLoss / (PkLoss_highBound - PkLoss_lowBound))

If RTTV >= RTTV_highBound, then RTTV_score = 0
If RTTV <= RTTV_lowBound, then RTTV_score = 100
If RTTV_lowBound < RTTV < RTTV_highBound, then RTTV_score = 100 * (RTTV / (RTTV_highBound - RTTV_lowBound))

To calculate the overall score, take the weighted average of the three quality scores:
score = RTT_score * RTT_weight_percentage / 100 +
        PkLoss_score * PkLoss_weight_percentage / 100 +
        RTTV_score * RTTV_weight_percentage / 100

然后，Horizon Client 使用以下规则确定网络稳定性：

Definitions:
score = overall network quality score
thresholdGood = minimum score indicating GOOD network stability
thresholdPoor = high limit of score range indicating POOR network stability

Rules:
If score >= thresholdGood, the network is considered GOOD and no notification is displayed.
If thresholdPoor < score < thresholdGood, the network is considered OK and no notification is displayed.
If score <= thresholdPoor, the network is considered POOR and a notification is displayed.

配置网络质量的阈值参数

要自定义 Horizon Client 用于计算网络质量评分并确定网络稳定性的阈值参数，请在某个 vvc 注册表文件中配置相应的项。

Horizon Client 将按所列顺序搜索注册表文件，并在找到具有已配置值的项时立即停止搜索。

**注意：**在更改这些配置项的默认值时，请慎重考虑。默认阈值是通过广泛的内部测试确定的，旨在为典型网络环境生成合理的结果。