Overview of System Architecture Have a glance at Figure 1. The configuration is a 3-layer structure. Every element has capability to link with its peers and upper/lower layer. Much like the up-to-date cellular network, almost all kinds of data can be tranceived th- rough the system. Mythril didn't request a system for massive users, so circuit switching became the switching measure of the chioce [2]. Normally links between layers are required to have the overall system work out, while those within one layer are not, though they may improve system effi- cency and robustness. Links between peers can also privide another advantage. When overall system are down, partial system may still work, which means parti- al effectiveness are allowed. The more detailed description will be given in l- ater sections. This somewhat complicated architecture have disadvantages, too. Versibility often brings huge bill, but as mentioned before that's not a problem. And thank to advanced fabrication technology provided by other IEEE experts, malfunction rate of components is lower than expected. Minimization of devices (both number and size) could have been a difficult problem, but by using certain design tec- hniques we managed to get it solved. Thus the system satisfies the demands of stability and portability. ┌────────┐ │ Global Network │ 全球網路 └────────┘ ／ ｜ ＼ ╱ ｜ ＼ ┌────────┐┌────────┐┌────────┐ ┌┤Regional Network├┤Regional Network├┤Regional Network├┐ 地區網路 │└────────┘└────────┘└────────┘│ │ ／ ｜ ＼ │ │ ╱ ｜ ＼ │ │ ┌─□─────□─────□─┐ │ │ │ User User User │ │ 使用者 │ └───────────────┘ │ └──────────────────────────────┘ Figure 1. System Configuration Reference: [2] In a Circuit Switching network, a dedicated communications path is established between two stations through the nodes of the n- etwork. The path is a connected sequence of physical links bet- ween nodes. Data and Computer Communications, 7ed., W. Stallings =================================以下是翻譯==================================== 系統架構概觀 請見圖1，該架構是一個三層式結構。每個單元都有能力與同儕和上/下層建立連結。 各種型態的資料都可以透過這套系統收發，與最先進的手機網路類似。為大量使用者提供 服務並非「密銀」的要求，所以在交換技術上我們使用線路交換 [2]。 正常而言，為使整體系統能夠運作，建立各層之間的連結是必要的，而同一層內的連 結並非必要，但它們可能增進系統的效率和強固程度。與同儕的連結同時也提供另一項優 點：當整體系統無法運作時，部分系統仍然可能正常運作。之後的章節會作更詳盡的解說 。 這個有些複雜的系統也有缺點。多功能通常代表高價格，當然如前述我們並不為此感 到困擾。並且，得力於其他IEEE專家提供的先進製造技術，原件的故障率比預期要低。裝 置的微型化(包含數量和大小)原本是個可能的難題，但我們藉由某些設計技巧解決了。因 此，這套系統滿足了穩定和輕便的要求。 參考來源：[2] 線路交換：在線路交換的網路中，一個專用的通訊通道被建立在傳輸的兩 端點之間，該通道是一個實體的連結序列。數據通訊第7版 W. Stallings --

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