臺灣博碩士論文加值系統

隨著工業物聯網技術的成熟與興起，不同設備之間所使用的通訊協定也有了更多
的選擇。而當中 DDS 通訊協定有著強大的功能與豐富的 QoS 策略，透過調整 QoS 策
略能滿足不同的需求與環境。在實際佈署之前，可以先透過 DDS 通訊協定模擬平台測
試所選的 QoS 策略是否合適，然而，DDS 通訊協定的 QoS 策略多而複雜，容易出現
設定錯誤而造成設備之間無法通訊的情況。
故本研究為 DDS 通訊協定模擬平台提出一樣設定工具，它包含一個基於 YAML
的描述語言，用來將基於 DDS 通訊協定的物聯網架構中，設備之間不同的資料流、訊
息發布的頻率、訊息的大小，和 DDS 通訊協定中的各項 QoS 策略等複雜的因素，抽象
化成適合機器和人類閱讀的簡單文字檔案，以及一個 DDS 通訊協定 QoS 策略一致性和
相容性的驗證機制，保證描述語言中的各項 DDS 通訊協定 QoS 策略都是有效且一致
的，並且在本語言經過處理後，可以產生 DDS 模擬平台，IIoT Testbed 的設定檔，協
助執行 DDS 模擬。

With the maturity and rise of IIoT technology, there are more choices in the
communication protocols used between different devices. Among of all, the DDS protocol has
powerful functions and rich QoS policies and it can adjust different QoS policies to meet
different needs and environments. Before the actual deployment, the DDS protocol emulation
platform can be used to test whether the selected QoS policy is appropriate. However, the
QoS policies of the DDS protocol is complex, and a user is prone to make mistakes when
setting QoS policies. Those mistakes may block the communication between devices.
Therefore, this thesis proposes a setting tool for the DDS protocol emulation platform. It
contains a YAML-based abstract language which is used to abstract the complex factors such
as different data flows, message publishing frequencies, message size and the various QoS
policies in a IIoT architecture based on the DDS protocol into a simple and readable text
document, and a QoS policies consistency and compatibility validation mechanism to ensure
that the various QoS policies which was used in an abstract language file are valid and
consistent. After being processed, the language can be convert to a configuration file of a
DDS emulation platform, IIoT Testbed, and help people to emulate DDS communication.

摘要 i
Abstract ii
目錄 iii
圖目錄 vi
表目錄 vii
一、 緒論 1
1-1 背景知識 2
1-1-1 DDS 2
1-1-2 YAML 5
1-1-3 IIoT Testbed 6
1-2 研究動機與目標 7
1-3 論文架構 . 8
二、 相關研究與討論 9
三、 預覽 DSAL . 10
3-1 定義 DDS QoS 策略範例 . 10
3-2 定義 DDS 實體範例 22
3-3 定義 DDS 通訊結構範例 28
3-4 完整 DSAL 範例 35
四、 處理 DSAL 46
4-1 載入 48
4-1-1. 剖析演示流 48
4-1-2. 編制表示圖 49
4-1-3. 建構原生資料結構 49
4-2 驗證格式 50
4-3 處理無窮值 52
4-4 解析 DDS QoS 策略群組 53
4-4-1. 檢查識別符 53
4-4-2. 檢查識別符及父識別符 53
4-4-3. 賦予 DDS QoS 策略預設值 54
4-4-4. 解析 DDS QoS 策略群組繼承關係 54
4-4-5. 建立 DDS QoS 策略群組映射表 54
4-5 解析 DDS 實體 56
4-5-1. 檢查 Topic、Data Writer、Data Reader 實體的識別符 56 4-5-2. 檢查 Data Writer 和 Data Reader 的識別符及父識別符 57
4-5-3. 建立 Topic 實體定義映射表 57
4-5-4. 檢查 Data Writer 和 Data Reader 的 Topic 識別符 57
4-5-5. 解析 Data Writer 和Data Reader 的繼承關係 57
4-5-6. 建立 Data Writer、Data Reader 實體定義映射表. 58
4-6 解析 DDS 通訊架構 59
4-6-1. 檢查 device 識別符 59
4-6-2. 檢查 Data Writer 及Data Reader 識別符 60
4-6-3. 檢查 Data Writer 及Data Reader 實體. 60
4-6-4. 解析 Data Writer 及Data Reader 實體. 60
4-6-5. 解析所有的DDS QoS 策略群組 61
4-7 驗證DDS QoS 策略一致性 62
4-8 驗證DDS QoS 策略相容性 63
4-9 產生DSAL資料集 64
4-10 模擬 DDS 通訊 . 64
五、 DSAL基本結構 65
5-1 關鍵字 65
5-1-1.qos 66
5-1-2 domains 66
5-1-3 partitions 66
5-2 BNF 語法說明 67
5-3 基本資料型態 68
5-4 資料結構 69
5-4-1. 映射表 69
5-4-2. 區塊映射表 . 69
5-4-3. 序列 70
5-5 值域和預設值 71
5-6 DSAL語法 75
5-6-1 dsal 75
5-6-2 define_qos 76
5-6-3 define_topic 77
5-6-4 define_data_writer 78
5-6-5 define_data_reader 79
5-6-6 devices 80
5-6-7. 可擴充性 83
六、 DSAL使用範例 84
6-1 實驗環境 . 84
6-2 實驗目的與設計 85
6-3 實驗方法 85
6-4 實驗結果 88
七、 結論與未來研究方向 88
參考文獻 90

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