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    Please use this identifier to cite or link to this item: http://ir.lib.ncu.edu.tw/handle/987654321/63535

    Title: WebSocket代理伺服器群組頻道與伺服端動態快取機制;WebSocket Proxy for group channel and server active cache mechanism
    Authors: 劉逸文;Liu,Yi-Wen
    Contributors: 資訊工程學系在職專班
    Keywords: 伺服器推送;網頁雙向通訊;WebSocket代理伺服器;群組頻道;重複性連線合併;動態快取;WebSocket;WebSocket proxy;channel group;active cache;combine duplicate connection
    Date: 2014-01-28
    Issue Date: 2014-04-02 15:47:25 (UTC+8)
    Publisher: 國立中央大學
    Abstract: 於現行的Web雙向通訊協定技術(Bi-directional web technologies)之中,以WebSocket效率優於其他Web雙向通訊技術(例如:Ajax),並在2011年由IETF定為通訊協定標準RFC 6455,以及W3C將WebSocket API列入為HTML5的標準。
    本論文也討論群組頻道及伺服端動態快取的分散式架構,使這兩種機制均可運用於互動性影音傳輸服務或WebTV,助於提升WebSocket通訊協定使用的效率,使得WebSocket通訊協定更適合運用於頻寬成本較高的網路環境中。; With current bi-directional web technologies, the efficiency of WebSocket is superior to other bi-directional web communication technologies (for example: Ajax). In 2011, it was defined by IETF as the RFC 6455 standard, and WebSocket API has been incorporated by W3C as a standard for HTML5.

    This paper focuses on the discussion of the efficiency of WebSocket protocol. When WebSocket is used for interactive video services or WebTV, access to the same video from different users causes repeated transmission of the same data. Therefore, in this paper, WebSocket proxy is utilized as a mechanism to group channels and another server Active Cache mechanism is to resolve the issue of repeated data transmission.

    The group channel mechanism is driven by the request of end users. When users make request on the same channel, the connection to the same information on the server can be merged, and information can be transmitted to the users as a group to save network bandwidth. However, it is limited by the fact that only completely identical connection can be merged. Therefore, another server Active Cache mechanism is developed. It works by initiating caching based on response from the server. Although it can resolve the limitation on the channel grouping mechanism, it creates additional bandwidth load because of caching control. Therefore, there is a need to discuss the benefits of transmission via caching control.

    This paper also discusses the distribution architecture of both mechanisms in order to improve the efficiency of WebSocket protocol application and make WebSocket protocol more suitable for network environment with high bandwidth cost.
    Appears in Collections:[資訊工程學系碩士在職專班 ] 博碩士論文

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