當各國寬頻網路的建置逐漸趨於完善，使得各種寬頻應用服務更加多元化，因而結合數據、語音及影像的三網合一(Tri-play)整合服務，已成為驅使寬頻產業成長的重要動力。隨著纜線數據機的標準規範演進到DOCSIS 3.0(Data Over Cable Service Interface specification)，因此吸引有線電視系統營運商積極進行網路升級。現行的有線電視經營者都是提供單獨的數位機上盒產品與纜線數據機機台給用戶，因此新一代產品透過提升數據速率及功能整合，讓營運業者可透過家庭網路為多個聯網用戶提供更先進的服務。
本研究提出以DVB-C視訊和DOCSIS3.0數據傳輸為基礎，透過系統整合的方法完成頭端閘道器(Headed Gateway)，為數位家庭傳輸提供了一個架構。頭端閘道器是家庭網路對外的閘道裝置，亦是使用者端與外界連接的設備，其提供了使用者家庭網路服務，也提供異質網路之間及各種智慧設備的通訊服務。所以在系統設計上會面臨許多的挑戰，因此如何增加射頻收發訊號能力就顯得相當重要，因為沒有良好的網路效能提供應用服務及連結家庭各個裝置，就無法構成數位家庭的應用，因此在頭端閘道器前端的射頻接收器設計出最佳的三工器(Triplexer)增加射頻效能非常重要。經由射頻共存實測的分析結果，在低接收功率的情況下，本設計仍然可以保持調變能力，而且再提升了至少15%最低接收功率。
除此外，高度整合性的頭端閘道器其功率消耗也高於其他功能單純的家庭閘道器或是機上盒，因此本研究在系統加入節電管理，依使用者的使用習慣定義模式，實際驗證下來可節省45%功率消耗。

Currently the broadband device and service have developed completely in home network. Accordingly, the integrated service of data, voice and video (Triple-play) has urged in broadband industry development. Such as upgrading to DOCSIS (Data Over Cable Service Interface specification) 3.0 of cable modem, more and more Multimedia Service Operators (MSO) are interesting in infrastructure upgrading aggressively. MSO provides the digital set-top box and cable modem products to end user, and delivers more advanced services through new generation product with better performance and integrated varied function.

This works proposed a concept of Headed Gateway via system integration based on DVB-C and DOCSIS, established a structure for digital home-used environment. Headed Gateway is a kind of home-used gateway device connecting to external internet which provided each kind of communication service of different domain. System design is very important on how to improve and optimize the performance of RF front-end receiver, so it is a difficult topic and can’t provide qualified application without proper application of connecting each device via sufficient internet service. That’s the reason why to design the optimized Triplexer on RF front-end receiver can also improve the performance. According to the analysis result, in the case of low reception power, it could keep great ability of modulation, and increasing at least 15% of minimum received power level. It’s essential to implement the management of energy saving since the power consumption of extremely integrated headed gateway is higher than other simple one or set-top boxes. According to the actual experiment, it is probably to save 45% power consumption if define the power mode according to the user's habit and operated condition.

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