隨著網際網路的普及化,使得上網人口逐漸擴增,更帶動了多元化的電子商務蓬勃發展,然而數位資料不斷快速增長,國內頻寬的擴增速度無法滿足使用者的需求,因此,為了有效提升整體網路服務品質,本研究試圖利用代理伺服器(proxy server)的快取機制(caching)及預先擷取機制(prefetching)作探討。 本研究依據代理伺服器的存取記錄檔(access log),進一步分析使用者瀏覽的興趣及主題領域(domain-based),依據目前電子商務之網站發展型態作觀察,將網站的主題領域依據網頁出現密度所隱含的資訊量作分類,再針對網站的主題領域特性作進一步分析,並考量時間變化與使用者瀏覽趨勢,將使用者可能重覆瀏覽的網頁做為預先擷取參考依據,以改善代理伺服器的快取命中率(hit ratio),降低使用者等待網頁傳輸的時間,進而提升整體網路服務品質。
Along with the Internet universalization, causes the surfer population to expand gradually increases, has led the multiplex electronic commerce vigorous development, however digital materials fast grow unceasingly, the speed of increasing physical bandwidth is unable to meet user's need, therefore, in order to improve the overall surfing quality effectively, this study focuses on caching and prefetching mechanisms on proxy server. This study basis proxy server access log, further analyzes the interest and subject field which the user surfs, makes the observation website of development state based on at present electronic commerce, appears the website subject field based on the web page the information quantity which the density conceals to do the classification, again aims at the website the subject field characteristic to do further analyzes, and considers the time variation and the user surfing tendency, to consider user possibly surfing duplicate pages as reference to see if it improves the proxy server hit ratio, reduces user waiting transmission time, and increasing overall surfing quality.