偵測不穩定的網路連線

Omnissa Horizon Client 可在遠端工作階段期間監控網路品質，若偵測到因延遲過高導致的網路不穩定，將顯示通知訊息。網路延遲是依 TCP 連線的來回行程時間 (RTT)，以及 BEAT 和 UDP 連線的 RTT、封包遺失和 RTT 變化 (RTTV) 來衡量。

您可以使用 Horizon Client 設定來控制這些通知訊息的顯示。您也可以設定 Horizon Client 用來確定不穩定網路的臨界值參數。

設定網路通知的顯示

您可以透過設定 Omnissa Horizon Blast 功能表項目來控制網路通知訊息的顯示。

1. 啟動 Horizon Client。

2. 從功能表列中選取檔案 > 設定 Horizon Blast。

   

3. 設定網路不穩定時通知的顯示。

   • 若要啟用網路通知，請取消選取停用網路狀態顯示選項。依預設，此選項為取消選取狀態，以允許顯示通知訊息。
   • 若要關閉網路通知，請選取停用網路狀態顯示選項。

4. 按一下確定以儲存您的變更。

Horizon Client 如何判定網路品質

為判定網路連線品質，Horizon Client 會在指定的時間間隔內，將網路條件與一組高低臨界值進行比較，並計算出一個介於 0 到 100% 之間的品質分數。若該分數低於某個百分比，則該網路會被視為高延遲且不穩定。

Horizon Client 根據使用的網路通訊協定來衡量以下網路條件。

Horizon Client 接著依照以下規則計算網路品質分數：

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

然後，Horizon Client 會使用以下規則判定網路的穩定性：

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.

設定網路品質的臨界值參數

若要自訂 Horizon Client 用來計算網路品質分數並判斷網路穩定性的臨界值參數，請在其中一個組態檔中設定相關機碼。

1. 全域設定
2. 使用者喜好設定
3. 使用者預設組態
4. 主機預設組態
5. 站台預設值

Horizon Client 會依照列出的順序搜尋組態檔，一旦找到已設定值的機碼即停止搜尋。

**附註：**變更這些組態機碼的預設值時，請小心。預設臨界值是透過完整的內部測試確定的，旨在為一般網路環境產生合理的結果。