本章節藉由改變系統架構逐步從有線網路到無線網路測詴模擬，漸進到直接 進行 Haptic device 實機測詴，使 QoS 順利運行於無線軟體定義網路的環境，並運 用有線環境證明 OpenFlow switch 之 QoS 機制的可行性，逐一更改架構成無線測 詴環境進行 QoS 實驗設置。然而在整體系統架構未加入 QoS 機制前，對於 Haptic
device 執行在無線網路傳輸上網路損耗遠比區域網路實驗高出許多且環境複雜之 情形下，所造成 Delay、Jitter 和 Packet loss 抖動劇烈對 Haptic device 而言是非常 危險的測詴環境。因此，第 4 章節所做的模擬測詴實際目的是為第五章的上機實 測作為參考，藉由 Background traffic 數量的差異來影響 Haptic device 封包傳輸可 發現未加入 QoS 機制時 Haptic device 會因測詴環境過於複雜，Delay、Jitter 和
Packet loss 增加以及 Background traffic 干擾下讓設備不動作、立即斷線以及瞬間 的抖動。加入 QoS 機制後，保證了 Haptic device 傳輸頻寬，避免了 Background
traffic 占掉 Haptic device 可傳輸頻寬，使網路 Jitter 和 Packet loss 降至趨近於 0%，
並維持圖形相似度達 80%以上，這對於 Haptic device 在無線網路的表現上是非常 好的呈現結果。
第六章
結論與未來研究方向
本研究針對了 Haptic device 實體設備架設在有損網路中所呈現的情形進行相 關分析及圖形繪製，由於網路損耗如 Delay、Jitter、Packet loss 對於 Haptic device 在使用者同步觸覺感知時會造成嚴重抖動，除非建置於良好的傳輸環境、降低網 路損耗降低或是進行補償機制等方式來獲得改善。因此本論文針對 Haptic device 建置 SDN 無線網路架構並使用 Jperf 模擬 Distributed Haptic device 雙向傳輸測詴 以評估 Distributed Haptic device 在 SDN 網路架構下之可行性，不僅能有效的模 擬出 Haptic device 測詴封包先行測詴網路環境，避免網路測詴將會對設備造成無 法彌補的損害，並且藉由改變系統架構逐步從有線網路測詴到無線網路模擬，進 階到直接進行 Haptic device 實機測詴，逐步使 QoS 順利運行於無線軟體定義網路 之環境，同時解除觸覺設備是否可運行於 SDN 的無線環境之疑慮。解決了不同 作業系統執行於網路相關實驗，尤其以時間同步易成為實驗過程中艱困的一環。
因此，在實驗期間克服了時間同步問題和定時執行批次檔及 Linux shell script 之 實驗測詴，以利實驗執行順利遂行。
未來研究與思考上目前雖已實作出 QoS 運行在無線軟體定義網路架構下，但
以達到 80%以上的相似度，最重要的無線傳輸距離和訊號強度對於 Haptic device 傳輸封包的影響程度還尚未進行測詴。在此也必頇克服無線網路的測詴環境不佳 和設備無法隨時移動至良好之環境進行實驗等問題都是需要慎重考慮並解決。
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